Railway applications -- Heating, ventilation and air conditioning systems for rolling stock

This document specifies a general approach for achieving thermal comfort for passenger compartments or saloons of railway vehicles (single level or double-decker) such as main line, regional/suburban and urban vehicles used in public transportation services. This document also describes guidelines to specify conditions, performance values and the comfort parameter measurement methods for compartments, saloons and local annexes. This document does not apply to the thermal comfort of the cab driver.

Applications ferroviaires -- Systèmes de chauffage, ventilation et climatisation pour le matériel roulant

Le présent document spécifie une approche générale pour atteindre un confort thermique pour les compartiments des voyageurs ou les salles de véhicules ferroviaires (ŕ un seul ou deux niveaux), tels que les véhicules grande ligne, les véhicules régionaux/périurbains et les véhicules urbains utilisés pour les services de transport public. Le présent document fournit également des lignes directrices pour spécifier les conditions, les valeurs de performances et les méthodes de mesure du paramčtre de bien-ętre pour les compartiments, salles et locaux annexes. Le présent document ne s'applique pas au confort thermique du conducteur de la cabine.

General Information

Status
Published
Publication Date
06-Jul-2020
Current Stage
5060 - Close of voting Proof returned by Secretariat
Start Date
30-May-2020
Completion Date
29-May-2020
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INTERNATIONAL ISO
STANDARD 19659-2
First edition
2020-07
Railway applications — Heating,
ventilation and air conditioning
systems for rolling stock —
Part 2:
Thermal comfort
Applications ferroviaires — Systèmes de chauffage, ventilation et
climatisation pour le matériel roulant —
Partie 2: Confort thermique
Reference number
ISO 19659-2:2020(E)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 19659-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO 19659-2:2020(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Category of passenger railway vehicles ........................................................................................................................................ 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Category 1 (e.g. main line, intercity, long-distance, high speed) .................................................................. 1

4.3 Category 2 (e.g. suburban, commuter, regional) ........................................................................................................ 2

4.4 Category 3 (e.g. urban, LRV, tram, metro/subway) ................................................................................................. 2

5 Design conditions ................................................................................................................................................................................................ 2

5.1 General ........................................................................................................................................................................................................... 2

5.2 Exterior design conditions ............................................................................................................................................................ 2

5.2.1 Parameters ............................................................................................................................................................................ 2

5.2.2 Temperature and corresponding relative humidity .......................................................................... 2

5.2.3 Solar radiation ................................................................................................................................................................... 4

5.2.4 Altitude ..................................................................................................................................................................................... 4

5.2.5 Train speed ........................................................................................................................................................................... 4

5.3 Extreme exterior conditions ....................................................................................................................................................... 5

5.4 Interior design conditions ............................................................................................................................................................. 5

5.4.1 Internal heat gains .......................................................................................................................................................... 5

5.4.2 Temperature and corresponding relative humidity .......................................................................... 5

6 Interior temperature setting (T ) ...................................................................................................................................................... 6

7 Thermal comfort parameters ................................................................................................................................................................. 9

7.1 General ........................................................................................................................................................................................................... 9

7.2 Interior air temperature in the comfort zone ............................................................................................................10

7.2.1 Mean interior temperature range (difference between T and T ) ...............................10

im ic

7.2.2 Horizontal temperature range (ΔT ) ...........................................................................................................10

7.2.3 Vertical temperature range (ΔT ) ...................................................................................................................10

7.3 Relative humidity in the comfort zone ............................................................................................................................10

7.4 Surface temperature on the comfort envelope .........................................................................................................11

7.5 Air velocity in the comfort zone ............................................................................................................................................11

7.6 Interior temperature in the local annexes ....................................................................................................................12

7.7 Air quality .................................................................................................................................................................................................12

7.7.1 Fresh air volume flow rate into the comfort zone ............................................................................12

7.7.2 Particulate filtration of the air ...........................................................................................................................13

7.7.3 Air transfer between interior zones .............................................................................................................13

8 Air movement tests .........................................................................................................................................................................................13

8.1 General ........................................................................................................................................................................................................13

8.2 Air volume flow rate ........................................................................................................................................................................13

8.3 Air velocity ...............................................................................................................................................................................................14

8.4 Air transfer between interior zones ..................................................................................................................................14

9 Climatic tests .........................................................................................................................................................................................................14

9.1 General ........................................................................................................................................................................................................14

9.2 Type of tests ...........................................................................................................................................................................................15

9.2.1 General...................................................................................................................................................................................15

9.2.2 Design conditions test ..............................................................................................................................................15

9.2.3 Extreme conditions test ..........................................................................................................................................15

9.2.4 Regulation test ................................................................................................................................................................15

9.2.5 Door open/close cycling test ..............................................................................................................................16

9.3 Test programme ..................................................................................................................................................................................16

© ISO 2020 – All rights reserved iii
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ISO 19659-2:2020(E)

10 Characteristics of the test facility and equipment ..........................................................................................................18

10.1 General ........................................................................................................................................................................................................18

10.2 Exterior temperature......................................................................................................................................................................18

10.3 Relative humidity ...............................................................................................................................................................................18

10.4 Occupation ...............................................................................................................................................................................................19

10.5 Wind speed (if required) .............................................................................................................................................................19

10.6 Equivalent solar load ......................................................................................................................................................................19

11 Recording and measuring instruments .....................................................................................................................................19

11.1 General ........................................................................................................................................................................................................19

11.2 Recording ..................................................................................................................................................................................................19

11.3 Temperature ...........................................................................................................................................................................................19

11.4 Relative humidity ...............................................................................................................................................................................20

11.5 Air velocity ...............................................................................................................................................................................................20

11.6 Air volume flow rate ........................................................................................................................................................................20

11.7 Wind speed (if required) .............................................................................................................................................................20

11.8 Equivalent solar load (if required) .....................................................................................................................................20

11.9 Energy consumption and power rating ..........................................................................................................................20

12 Position of measuring points ................................................................................................................................................................20

12.1 General ........................................................................................................................................................................................................20

12.2 Position of sensors in the passenger railway vehicle .........................................................................................20

12.2.1 General...................................................................................................................................................................................20

12.2.2 Interior air temperature .........................................................................................................................................21

12.2.3 Relative humidity .........................................................................................................................................................21

12.2.4 Surface temperature ..................................................................................................................................................21

12.2.5 Air velocity .........................................................................................................................................................................21

12.2.6 Interior temperature in the local annex ...................................................................................................21

12.3 Position of sensors in the test facility ...............................................................................................................................21

12.3.1 General...................................................................................................................................................................................21

12.3.2 Exterior air temperature ........................................................................................................................................21

12.3.3 Relative humidity .........................................................................................................................................................21

12.3.4 Wind speed (if required) .......................................................................................................................................21

12.3.5 Equivalent solar load (if required) ................................................................................................................22

12.4 Position of sensors for testing where no test facility exists ..........................................................................22

12.4.1 General...................................................................................................................................................................................22

12.4.2 Exterior air temperature ........................................................................................................................................22

12.4.3 Relative humidity .........................................................................................................................................................22

12.4.4 Wind speed ........................................................................................................................................................................22

12.4.5 Solar load (if required) ............................................................................................................................................22

Annex A (informative) Example of exterior design temperature and corresponding relative

humidity .....................................................................................................................................................................................................................23

Annex B (informative) PMV calculation results per each vehicle category ...............................................................25

Annex C (informative) Method to calculate the recommended air velocity range ............................................30

Bibliography .............................................................................................................................................................................................................................31

iv © ISO 2020 – All rights reserved
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ISO 19659-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 269, Railway applications, Subcommittee

SC 2, Rolling Stock.
A list of all parts in the ISO 19659 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO 19659-2:2020(E)
Introduction

Thermal comfort is the condition that expresses satisfaction with the thermal environment. This is

mostly reached if the heat generated by the human metabolism is allowed to dissipate in every part

of the human body in order to maintain thermal equilibrium with the surroundings. Since the heat

generated by the human metabolism is individual, the satisfaction with the thermal comfort condition

is also individual.

The main factors that influence thermal comfort locally at every part of the human body are physical

activity, clothing insulation, air temperature, mean radiant temperature, air velocity and relative

humidity. A satisfying thermal equilibrium can be reached in various combinations of the mentioned

factors. Therefore, it is not possible to specify an independent optimum of a single factor, like air

temperature, mean radiant temperature, air velocity or relative humidity.

ISO 7730 presents methods for predicting the general thermal sensation and degree of thermal

satisfaction of people exposed to moderate thermal environments in buildings.

The thermal comfort sensation in railway vehicles is in addition strongly affected by temporary factors.

Passengers enter the vehicle coming from an environment with a different thermal condition and with

an individual physical activity level. Thermal comfort sensation is then temporary depending on the

thermal equilibrium and comfort sensation generated in the environment where they are coming from.

In hot weather conditions, passengers who travel just for some minutes in an urban train typically

prefer lower temperatures and higher air velocities than passengers who travel for some hours in a

long-distance train. Further, whether passengers adapt their clothing during their stay in the vehicle is

of additional influence.

The thermal comfort which can be offered is also affected by temporary factors. The interaction of the

vehicle with the environment influences the thermal condition in the occupied areas in a dynamic way.

Door openings in train stations, rapidly changing outside weather conditions, rapidly changing degree

of occupation cannot be balanced promptly by the installed HVAC system.

The mentioned combinations of air temperature, mean radiant temperature, air velocity and relative

humidity are furthermore limited by the high grade of occupation, high air volume exchange rate, short

distance between passenger and surrounding surfaces and other technical constraints of a railway

vehicle.

This document takes into account these special conditions in railway vehicles. It deals with the

influence of the exterior climatic condition on the dimensioning of the HVAC system, the air quality, and

the measurement methods in order to achieve adequate thermal comfort. This document also considers

specific areas in railway vehicles, such as sanitary rooms, entrance areas and galleries.

This document describes the parameters and requirements in general which should be taken into

account when designing and testing an HVAC system for railway vehicles. This document also describes

guidelines to specify conditions, performance values and the comfort parameter measurement

methods, but does not specify detailed pass and fail criteria for comfort requirements or any other

technical property of the railway vehicles.

These specifications are designed to be considered together with the national/regional standards,

which take into account different preferences, local weather and operational conditions.

vi © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
INTERNATIONAL STANDARD ISO 19659-2:2020(E)
Railway applications — Heating, ventilation and air
conditioning systems for rolling stock —
Part 2:
Thermal comfort
1 Scope

This document specifies a general approach for achieving thermal comfort for passenger compartments

or saloons of railway vehicles (single level or double-decker) such as main line, regional/suburban and

urban vehicles used in public transportation services.

This document also describes guidelines to specify conditions, performance values and the comfort

parameter measurement methods for compartments, saloons and local annexes.
This document does not apply to the thermal comfort of the cab driver.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 19659-1, Railway applications — Heating, ventilation and air conditioning systems for rolling stock —

Part 1: Terms and definitions
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 19659-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Category of passenger railway vehicles
4.1 General

For the needs of this document, passenger railway vehicles are categorized into three types that

consider average passenger travel time and average time between station stops next to each other. The

following subclauses, 4.2, 4.3 and 4.4, are helpful for choosing the category.

NOTE The ability to achieve thermal comfort is influenced by the type of train. It is not practicable to take

a level of thermal comfort of one vehicle category and apply it to a different vehicle category. For example, it is

generally not feasible to provide the higher level of thermal comfort of a main line train in an urban train.

4.2 Category 1 (e.g. main line, intercity, long-distance, high speed)

Passenger railway vehicles are typically used in long-distance transit services between major cities

and/or regions of a country and sometimes across several countries. They have toilets and often have

© ISO 2020 – All rights reserved 1
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ISO 19659-2:2020(E)

food service facilities, such as a dining car or a restaurant car. Passenger railway vehicles travelling

overnight also sometimes have sleeping cars. Passenger coach interiors are typically fitted with

comfortably spaced and configured seating and separated by interior doors from the vestibule.

The average passenger travel time is typically more than 30 minutes and the average time between

consecutive station stops is typically 15 to 30 minutes or more.
4.3 Category 2 (e.g. suburban, commuter, regional)

Passenger railway vehicles are typically used in medium-distance transit services between cities

and suburban areas or between smaller communities along the line or at the outer rim of a suburban

belt. Passenger coach interiors are normally equipped with high-density seating with proportionately

limited space for standing passengers. The average passenger travel time is typically more than

20 minutes and the average time between consecutive station stops is typically 5 to 10 minutes.

4.4 Category 3 (e.g. urban, LRV, tram, metro/subway)

Passenger railway vehicles are typically used in high-density urban passenger transportation services.

Passenger coach interiors are normally equipped with limited seating with a proportionately large

space for standing passengers. The average passenger travel time is typically less than 20 minutes and

the average time between consecutive station stops is typically 1 to 5 minutes.
5 Design conditions
5.1 General

Exterior/interior boundary conditions, under which the comfort parameters shall be achieved, shall be

specified as the design conditions in the technical specification.

Since exterior/interior design conditions depend on local climatological conditions, this document does

not give specific values for exterior/interior design conditions. It is recommended to use values taken

from relevant national/regional standards, literature or existing meteorological data. In case such

values are not available, this document provides recommended values that can be applied in general.

5.2 Exterior design conditions
5.2.1 Parameters

The values for the parameters — temperature and corresponding relative humidity, solar radiation,

altitude, train speed — shall be specified based on actual conditions throughout the service route and

should be described in the technical specification or the relevant national/regional standard.

In 5.2.2 to 5.2.5, recommendations are given that specify the exterior design conditions.

5.2.2 Temperature and corresponding relative humidity

Table 1 gives typical climatic design conditions for summer and Table 2 gives typical climatic design

...

NORME ISO
INTERNATIONALE 19659-2
Première édition
2020-07
Applications ferroviaires —
Systèmes de chauffage, ventilation
et climatisation pour le matériel
roulant —
Partie 2:
Confort thermique
Railway applications — Heating, ventilation and air conditioning
systems for rolling stock —
Part 2: Thermal comfort
Numéro de référence
ISO 19659-2:2020(F)
ISO 2020
---------------------- Page: 1 ----------------------
ISO 19659-2:2020(F)
DOCUMENT PROTÉGÉ PAR COPYRIGHT
© ISO 2020

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y compris la photocopie, ou la diffusion sur l’internet ou sur un intranet, sans autorisation écrite préalable. Une autorisation peut

être demandée à l’ISO à l’adresse ci-après ou au comité membre de l’ISO dans le pays du demandeur.

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Publié en Suisse
ii © ISO 2020 – Tous droits réservés
---------------------- Page: 2 ----------------------
ISO 19659-2:2020(F)
Sommaire Page

Avant-propos ................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Domaine d'application ................................................................................................................................................................................... 1

2 Références normatives ................................................................................................................................................................................... 1

3 Termes et définitions ....................................................................................................................................................................................... 1

4 Catégorie de véhicules ferroviaires pour voyageurs....................................................................................................... 1

4.1 Généralités .................................................................................................................................................................................................. 1

4.2 Catégorie 1 (par exemple, grande ligne, interurbain, longue distance, grande vitesse) ......... 2

4.3 Catégorie 2 (par exemple, train suburbain, de banlieue, régional) ........................................................... 2

4.4 Catégorie 3 (par exemple, train urbain, métro léger, tram, métro) ........................................................... 2

5 Conditions de conception ............................................................................................................................................................................ 2

5.1 Généralités .................................................................................................................................................................................................. 2

5.2 Conditions de conception extérieures ................................................................................................................................ 2

5.2.1 Paramètres ............................................................................................................................................................................ 2

5.2.2 Température et humidité relative correspondante............................................................................ 3

5.2.3 Rayonnement solaire ................................................................................................................................................... 4

5.2.4 Altitude ..................................................................................................................................................................................... 4

5.2.5 Vitesse du train.................................................................................................................................................................. 5

5.3 Conditions extérieures extrêmes ............................................................................................................................................ 5

5.4 Conditions de conception intérieures ................................................................................................................................. 5

5.4.1 Apports thermiques internes ................................................................................................................................ 5

5.4.2 Température et humidité relative correspondante............................................................................ 5

6 Température intérieure de consigne (T ) .................................................................................................................................. 6

7 Paramètres de confort thermique ...................................................................................................................................................... 9

7.1 Généralités .................................................................................................................................................................................................. 9

7.2 Température de l'air intérieur dans la zone de bien-être .................................................................................. 9

7.2.1 Plage de températures intérieures moyennes (différence entre T et T ) ................. 9

im ic

7.2.2 Gradient thermique horizontal (ΔT ) ............................................................................................................ 9

7.2.3 Gradient thermique vertical (ΔT ).................................................................................................................... 9

7.3 Humidité relative dans la zone de bien-être...............................................................................................................10

7.4 Température de surface sur le volume de bien-être ............................................................................................10

7.5 Vitesse de l'air dans la zone de bien-être ......................................................................................................................10

7.6 Température intérieure dans les locaux annexes ..................................................................................................11

7.7 Qualité de l'air ......... ..............................................................................................................................................................................12

7.7.1 Volume du débit d'air neuf dans la zone de bien-être ..................................................................12

7.7.2 Filtration des particules de l'air .......................................................................................................................13

7.7.3 Transfert d'air entre les zones intérieures .............................................................................................13

8 Essais aérauliques ............................................................................................................................................................................................13

8.1 Généralités ...............................................................................................................................................................................................13

8.2 Volume du débit d'air .....................................................................................................................................................................13

8.3 Vitesse de l'air .......................................................................................................................................................................................14

8.4 Transfert d'air entre les zones intérieures ..................................................................................................................14

9 Essais climatiques ............................................................................................................................................................................................14

9.1 Généralités ...............................................................................................................................................................................................14

9.2 Types d'essais .......................................................................................................................................................................................15

9.2.1 Généralités .........................................................................................................................................................................15

9.2.2 Essai en conditions de conception ................................................................................................................15

9.2.3 Essai en conditions extrêmes .............................................................................................................................16

9.2.4 Essai de régulation ......................................................................................................................................................16

9.2.5 Essai de cycle d'ouverture/fermeture des portes ............................................................................16

9.3 Programme d'essais.........................................................................................................................................................................17

© ISO 2020 – Tous droits réservés iii
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ISO 19659-2:2020(F)

10 Caractéristiques des installations et équipements d'essai ...................................................................................19

10.1 Généralités ...............................................................................................................................................................................................19

10.2 Température extérieure ...............................................................................................................................................................19

10.3 Humidité relative ...............................................................................................................................................................................19

10.4 Occupation ...............................................................................................................................................................................................19

10.5 Vitesse du vent (si nécessaire) ...............................................................................................................................................19

10.6 Puissance solaire équivalente .................................................................................................................................................19

11 Instruments d'enregistrement et de mesurage ................................................................................................................20

11.1 Généralités ...............................................................................................................................................................................................20

11.2 Enregistrement ....................................................................................................................................................................................20

11.3 Température ...........................................................................................................................................................................................20

11.4 Humidité relative ...............................................................................................................................................................................20

11.5 Vitesse de l'air .......................................................................................................................................................................................20

11.6 Volume du débit d'air .....................................................................................................................................................................20

11.7 Vitesse du vent (si nécessaire) ...............................................................................................................................................21

11.8 Puissance solaire équivalente (le cas échéant) ........................................................................................................21

11.9 Consommation d'énergie et puissance nominale ..................................................................................................21

12 Position des points de mesurage ......................................................................................................................................................21

12.1 Généralités ...............................................................................................................................................................................................21

12.2 Position des capteurs dans le véhicule ferroviaire pour voyageurs.......................................................21

12.2.1 Généralités .........................................................................................................................................................................21

12.2.2 Température de l'air intérieur ..........................................................................................................................21

12.2.3 Humidité relative ..........................................................................................................................................................21

12.2.4 Température de surface ..........................................................................................................................................22

12.2.5 Vitesse de l'air .................................................................................................................................................................22

12.2.6 Température intérieure dans le local annexe.......................................................................................22

12.3 Position des capteurs dans l'installation d'essai ....................................................................................................22

12.3.1 Généralités .........................................................................................................................................................................22

12.3.2 Température de l'air extérieur ..........................................................................................................................22

12.3.3 Humidité relative ..........................................................................................................................................................22

12.3.4 Vitesse du vent (si nécessaire)..........................................................................................................................22

12.3.5 Puissance solaire équivalente (le cas échéant)...................................................................................22

12.4 Position des capteurs pour des essais sans installation ...................................................................................22

12.4.1 Généralités .........................................................................................................................................................................22

12.4.2 Température de l'air extérieur ..........................................................................................................................22

12.4.3 Humidité relative ..........................................................................................................................................................23

12.4.4 Vitesse du vent ................................................................................................................................................................23

12.4.5 Puissance solaire (le cas échéant) .................................................................................................................23

Annexe A (informative) Exemple de température de conception extérieure et d'humidité

relative correspondante ............................................................................................................................................................................24

Annexe B (informative) Résultats du calcul de l'indice PMV pour chaque catégorie de véhicule .....26

Annexe C (informative) Méthode de calcul de la plage de vitesse de l'air recommandée..........................33

Bibliographie ...........................................................................................................................................................................................................................34

iv © ISO 2020 – Tous droits réservés
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ISO 19659-2:2020(F)
Avant-propos

L'ISO (Organisation internationale de normalisation) est une fédération mondiale d'organismes

nationaux de normalisation (comités membres de l'ISO). L'élaboration des Normes internationales est

en général confiée aux comités techniques de l'ISO. Chaque comité membre intéressé par une étude

a le droit de faire partie du comité technique créé à cet effet. Les organisations internationales,

gouvernementales et non gouvernementales, en liaison avec l'ISO participent également aux travaux.

L'ISO collabore étroitement avec la Commission électrotechnique internationale (CEI) en ce qui

concerne la normalisation électrotechnique.

Les procédures utilisées pour élaborer le présent document et celles destinées à sa mise à jour sont

décrites dans les Directives ISO/CEI, Partie 1. Il convient, en particulier de prendre note des différents

critères d'approbation requis pour les différents types de documents ISO. Le présent document a été

rédigé conformément aux règles de rédaction données dans les Directives ISO/CEI, Partie 2 (voir www

.iso .org/ directives).

L'attention est appelée sur le fait que certains des éléments du présent document peuvent faire l'objet de

droits de propriété intellectuelle ou de droits analogues. L'ISO ne saurait être tenue pour responsable

de ne pas avoir identifié de tels droits de propriété et averti de leur existence. Les détails concernant

les références aux droits de propriété intellectuelle ou autres droits analogues identifiés lors de

l'élaboration du document sont indiqués dans l'Introduction et/ou sur la liste ISO des déclarations de

brevets reçues (voir www .iso .org/ brevets).

Les éventuelles appellations commerciales utilisées dans le présent document sont données pour

information à l'intention des utilisateurs et ne constituent pas une approbation ou une recommandation.

Pour une explication de la nature volontaire des normes, de la signification des termes et expressions

spécifiques de l'ISO liés à l'évaluation de la conformité, aussi bien que pour des informations au sujet de

l'adhésion de l'ISO aux principes de l'OMC concernant les obstacles techniques au commerce (OTC) voir

le lien suivant: https:// www .iso .org/ fr/ foreword -supplementary -information .html .

Le comité chargé de l'élaboration du présent document est l'ISO/TC 269, Applications ferroviaires, Sous-

comité SC 2, Matériel Roulant.

Une liste de toutes les parties de la série ISO 19659 se trouve sur le site web de l’ISO.

Il convient que l’utilisateur adresse tout retour d’information ou toute question concernant le présent

document à l’organisme national de normalisation de son pays. Une liste exhaustive desdits organismes

se trouve à l’adresse www .iso .org/ fr/ members .html.
© ISO 2020 – Tous droits réservés v
---------------------- Page: 5 ----------------------
ISO 19659-2:2020(F)
Introduction

Le confort thermique est la condition qui exprime la satisfaction par rapport à l'environnement

thermique. Cette condition est essentiellement atteinte lorsque la chaleur produite par le métabolisme

humain peut se diffuser dans l'ensemble du corps humain, afin de maintenir un équilibre thermique

par rapport à son environnement. Étant donné que la chaleur produite par le métabolisme humain est

individuelle, la satisfaction par rapport à la condition de confort thermique est également individuelle.

Les principaux facteurs qui influencent le confort thermique localement sur chaque partie du corps

humain sont l'activité physique, l'isolation vestimentaire, la température de l'air, la température

radiante moyenne, la vitesse de l'air et l'humidité relative. Un équilibre thermique satisfaisant peut être

atteint avec diverses combinaisons des facteurs susmentionnés. Il n'est donc pas possible de spécifier un

optimum indépendant pour un facteur unique, comme la température de l'air, la température radiante

moyenne, la vitesse de l'air ou l'humidité relative.

L'ISO 7730 présente des méthodes pour prévoir la sensation thermique générale et le degré de

satisfaction thermique des personnes exposées à des environnements thermiques modérés au sein de

bâtiments.

La sensation de confort thermique à l'intérieur de véhicules ferroviaires est de plus fortement impactée

par des facteurs temporaires.

Les passagers entrent dans le véhicule en sortant d'un environnement d'une condition thermique

différente et avec un niveau d'activité physique individuel. La sensation de confort thermique dépend

de ce fait temporairement de l'équilibre thermique et de la sensation de confort thermique générés

par l'environnement duquel les passagers sortent. En cas de conditions de forte chaleur, les passagers

voyageant seulement quelques minutes dans un train urbain préfèrent habituellement des températures

plus basses et une vitesse de l'air plus élevée que les passagers voyageant plusieurs heures dans un

train longue distance. De plus, le fait que les passagers adaptent ou non leur tenue vestimentaire au

cours de leur voyage dans le véhicule est un facteur influant supplémentaire.

Le confort thermique qui peut être offert est également affecté par des facteurs temporaires.

L'interaction du véhicule avec l'environnement influence de façon dynamique la condition thermique

des zones occupées. Les ouvertures de portes en gare, l'évolution rapide des conditions météorologiques

extérieures et l'évolution rapide du degré d'occupation ne peuvent pas être équilibrées rapidement par

le système HVAC installé.

Les combinaisons susmentionnées de température de l'air, de température radiante moyenne, de

vitesse de l'air et d'humidité relative sont en outre limitées par le haut niveau d'occupation, le taux

de renouvellement d'air élevé, la proximité entre passagers et les surfaces environnantes, et d'autres

contraintes techniques propres à un véhicule ferroviaire.

Le présent document prend en compte les conditions spéciales propres aux véhicules ferroviaires. Elle

traite de l'influence des conditions climatiques extérieures sur le dimensionnement du système HVAC,

la qualité de l'air et les méthodes de mesure afin d’atteindre un confort thermique adéquat. Le présent

document prend également en compte les zones spécifiques, dans les véhicules ferroviaires, telles que

les locaux sanitaires, les espaces d'entrée et les galeries.

Le présent document décrit les paramètres et les exigences qu'il convient de prendre en compte de

façon générale lors de la conception et de l'essai d'un système HVAC pour véhicules ferroviaires. Le

présent document décrit également les lignes directrices pour spécifier des conditions, des valeurs

de performance et les méthodes de mesurages du paramètre de bien-être, mais ne spécifie pas de

critères de réussite ou d'échec détaillés par rapport aux exigences de bien-être ou toute autre propriété

technique des véhicules ferroviaires.

Lesdites spécifications sont conçues pour être étudiées conjointement aux normes nationales/

régionales, qui prennent en compte différentes préférences et diverses conditions météorologiques

locales et opérationnelles.
vi © ISO 2020 – Tous droits réservés
---------------------- Page: 6 ----------------------
NORME INTERNATIONALE ISO 19659-2:2020(F)
Applications ferroviaires — Systèmes de chauffage,
ventilation et climatisation pour le matériel roulant —
Partie 2:
Confort thermique
1 Domaine d'application

Le présent document spécifie une approche générale pour atteindre un confort thermique pour les

compartiments des voyageurs ou les salles de véhicules ferroviaires (à un seul ou deux niveaux), tels

que les véhicules grande ligne, les véhicules régionaux/périurbains et les véhicules urbains utilisés

pour les services de transport public.

Le présent document fournit également des lignes directrices pour spécifier les conditions, les valeurs

de performances et les méthodes de mesure du paramètre de bien-être pour les compartiments, salles

et locaux annexes.

Le présent document ne s’applique pas au confort thermique du conducteur de la cabine.

2 Références normatives

Les documents suivants cités dans le texte constituent, pour tout ou partie de leur contenu, des

exigences du présent document. Pour les références datées, seule l’édition citée s’applique. Pour les

références non datées, la dernière édition du document de référence s’applique (y compris les éventuels

amendements).

ISO 19659-1, Applications ferroviaires — Systèmes de chauffage, ventilation et climatisation pour le

matériel roulant — Partie 1: Termes et définitions
3 Termes et définitions

Pour les besoins du présent document, les termes et définitions donnés dans l'ISO 19659-1 s'appliquent.

L'ISO et l'IEC tiennent à jour des bases de données terminologiques destinées à être utilisées en

normalisation, consultables aux adresses suivantes:

— ISO Online browsing platform: disponible à l'adresse https:// www .iso .org/ obp

— IEC Electropedia: disponible à l'adresse http:// www .electropedia .org/
4 Catégorie de véhicules ferroviaires pour voyageurs
4.1 Généralités

Pour les besoins du présent document, les véhicules ferroviaires pour voyageurs sont classés en trois

catégories qui tiennent compte du temps moyen de trajet des voyageurs et du temps moyen entre deux

arrêts en gare. Les paragraphes 4.2, 4.3 et 4.4 sont utiles pour le choix de la catégorie.

NOTE Le type de train influence l'aptitude à atteindre le confort thermique. Il s'avère peu pratique

d'emprunter un niveau de confort thermique d'une catégorie de véhicules et de l'appliquer à une autre catégorie

de véhicules. Par exemple, il est généralement impossible d'attribuer à un train urbain le niveau de confort

thermique supérieur d'un train grande ligne.
© ISO 2020 – Tous droits réservés 1
---------------------- Page: 7 ----------------------
ISO 19659-2:2020(F)
4.2 Catégorie 1 (par exemple, grande ligne, interurbain, longue distance, grande
vitesse)

Les véhicules ferroviaires pour voyageurs sont habituellement utilisés pour les services de transport

longue distance entre de grandes villes et/ou régions d'un pays et parfois entre plusieurs pays. Ils

sont équipés de toilettes et proposent souvent des installations de restauration, telles qu’une voiture-

restaurant ou un wagon-restaurant. Les véhicules ferroviaires pour voyageurs effectuant des trajets de

nuit sont parfois également équipés de wagons-lits. L'intérieur des voitures offre, en règle générale, un

espace confortable avec des sièges configurés; il est séparé de la plate-forme par des portes intérieures.

Le temps moyen de trajet des voyageurs est généralement supérieur à 30 min et le temps moyen entre

deux arrêts en gare successifs est habituellement compris entre 15 min et 30 min, voire plus.

4.3 Catégorie 2 (par exemple, train suburbain, de banlieue, régional)

Les véhicules ferroviaires pour voyageurs sont habituellement utilisés pour les services de transport

moyenne distance entre des villes et des zones suburbaines, ou entre des communautés plus modestes

le long de la ligne ou à la périphérie extérieure d'une ceinture suburbaine. L'intérieur des voitures

est généralement équipé de sièges haute densité avec un espace proportionnellement limité pour les

passagers qui voyagent debout. Le temps moyen de trajet des voyageurs est généralement supérieur à

20 min et le temps moyen entre deux arrêts en gare successifs est habituellement compris entre 5 min

et 10 min.
4.4 Catégorie 3 (par exemple, train urbain, métro léger, tram, métro)

Les véhicules ferroviaires pour voyageurs sont habituellement utilisés pour les services de transport

de voyageurs urbains de haute densité. L'intérieur des voitures est généralement équipé de sièges en

nombre limité avec un espace proportionnellement important pour les passagers qui voyagent debout.

Le temps moyen de trajet des voyageurs est généralement inférieur à 20 min et le temps moyen entre

deux arrêts en gare success
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 19659-2
ISO/TC 269/SC 2
Railway applications — Heating,
Secretariat: AFNOR
ventilation and air conditioning
Voting begins on:
2020-04-03 systems for rolling stock —
Voting terminates on:
Part 2:
2020-05-29
Thermal comfort
Applications ferroviaires — Systèmes de chauffage, ventilation et
climatisation pour le matériel roulant —
Partie 2: Confort thermique
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 19659-2:2020(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. ISO 2020
---------------------- Page: 1 ----------------------
ISO/FDIS 19659-2:2020(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2020

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may

be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting

on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address

below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved
---------------------- Page: 2 ----------------------
ISO/FDIS 19659-2:2020(E)
Contents Page

Foreword ..........................................................................................................................................................................................................................................v

Introduction ................................................................................................................................................................................................................................vi

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Category of passenger railway vehicles ........................................................................................................................................ 1

4.1 General ........................................................................................................................................................................................................... 1

4.2 Category 1 (e.g. main line, intercity, long-distance, high speed) .................................................................. 1

4.3 Category 2 (e.g. suburban, commuter, regional) ........................................................................................................ 2

4.4 Category 3 (e.g. urban, LRV, tram, metro/subway) ................................................................................................. 2

5 Design conditions ................................................................................................................................................................................................ 2

5.1 General ........................................................................................................................................................................................................... 2

5.2 Exterior design conditions ............................................................................................................................................................ 2

5.2.1 Parameters ............................................................................................................................................................................ 2

5.2.2 Temperature and corresponding relative humidity .......................................................................... 2

5.2.3 Solar radiation ................................................................................................................................................................... 4

5.2.4 Altitude ..................................................................................................................................................................................... 4

5.2.5 Train speed ........................................................................................................................................................................... 4

5.3 Extreme exterior conditions ....................................................................................................................................................... 5

5.4 Interior design conditions ............................................................................................................................................................. 5

5.4.1 Internal heat gains .......................................................................................................................................................... 5

5.4.2 Temperature and corresponding relative humidity .......................................................................... 5

6 Interior temperature setting (T ) ...................................................................................................................................................... 6

7 Thermal comfort parameters ................................................................................................................................................................. 9

7.1 General ........................................................................................................................................................................................................... 9

7.2 Interior air temperature in the comfort zone ............................................................................................................10

7.2.1 Mean interior temperature range (difference between T and T ) ...............................10

im ic

7.2.2 Horizontal temperature range (ΔT ) ...........................................................................................................10

7.2.3 Vertical temperature range (ΔT ) ...................................................................................................................10

7.3 Relative humidity in the comfort zone ............................................................................................................................10

7.4 Surface temperature on the comfort envelope .........................................................................................................11

7.5 Air velocity in the comfort zone ............................................................................................................................................11

7.6 Interior temperature in the local annexes ....................................................................................................................12

7.7 Air quality .................................................................................................................................................................................................12

7.7.1 Fresh air volume flow rate into the comfort zone ............................................................................12

7.7.2 Particulate filtration of the air ...........................................................................................................................13

7.7.3 Air transfer between interior zones .............................................................................................................13

8 Air movement tests .........................................................................................................................................................................................13

8.1 General ........................................................................................................................................................................................................13

8.2 Air volume flow rate ........................................................................................................................................................................13

8.3 Air velocity ...............................................................................................................................................................................................14

8.4 Air transfer between interior zones ..................................................................................................................................14

9 Climatic tests .........................................................................................................................................................................................................14

9.1 General ........................................................................................................................................................................................................14

9.2 Type of tests ...........................................................................................................................................................................................15

9.2.1 General...................................................................................................................................................................................15

9.2.2 Design conditions test ..............................................................................................................................................15

9.2.3 Extreme conditions test ..........................................................................................................................................15

9.2.4 Regulation test ................................................................................................................................................................15

9.2.5 Door open/close cycling test ..............................................................................................................................16

9.3 Test program ..........................................................................................................................................................................................16

© ISO 2020 – All rights reserved iii
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ISO/FDIS 19659-2:2020(E)

10 Characteristics of the test facility and equipment ..........................................................................................................18

10.1 General ........................................................................................................................................................................................................18

10.2 Exterior temperature......................................................................................................................................................................18

10.3 Relative humidity ...............................................................................................................................................................................18

10.4 Occupation ...............................................................................................................................................................................................19

10.5 Wind speed (if required) .............................................................................................................................................................19

10.6 Equivalent solar load ......................................................................................................................................................................19

11 Recording and measuring instruments .....................................................................................................................................19

11.1 General ........................................................................................................................................................................................................19

11.2 Recording ..................................................................................................................................................................................................19

11.3 Temperature ...........................................................................................................................................................................................19

11.4 Relative humidity ...............................................................................................................................................................................20

11.5 Air velocity ...............................................................................................................................................................................................20

11.6 Air volume flow rate ........................................................................................................................................................................20

11.7 Wind speed (if required) .............................................................................................................................................................20

11.8 Equivalent solar load (if required) .....................................................................................................................................20

11.9 Energy consumption and power rating ..........................................................................................................................20

12 Position of measuring points ................................................................................................................................................................20

12.1 General ........................................................................................................................................................................................................20

12.2 Position of sensors in the passenger railway vehicle .........................................................................................20

12.2.1 General...................................................................................................................................................................................20

12.2.2 Interior air temperature .........................................................................................................................................21

12.2.3 Relative humidity .........................................................................................................................................................21

12.2.4 Surface temperature ..................................................................................................................................................21

12.2.5 Air velocity .........................................................................................................................................................................21

12.2.6 Interior temperature in the local annex ...................................................................................................21

12.3 Position of sensors in the test facility ...............................................................................................................................21

12.3.1 General...................................................................................................................................................................................21

12.3.2 Exterior air temperature ........................................................................................................................................21

12.3.3 Relative humidity .........................................................................................................................................................21

12.3.4 Wind speed (if required) .......................................................................................................................................21

12.3.5 Equivalent solar load (if required) ................................................................................................................22

12.4 Position of sensors for testing where no test facility exists ..........................................................................22

12.4.1 General...................................................................................................................................................................................22

12.4.2 Exterior air temperature ........................................................................................................................................22

12.4.3 Relative humidity .........................................................................................................................................................22

12.4.4 Wind speed ........................................................................................................................................................................22

12.4.5 Solar load (if required) ............................................................................................................................................22

Annex A (informative) Example of exterior design temperature and corresponding relative

humidity .....................................................................................................................................................................................................................23

Annex B (informative) PMV calculation results per each vehicle category ...............................................................25

Annex C (informative) Method to calculate the recommended air velocity range ............................................30

Bibliography .............................................................................................................................................................................................................................31

iv © ISO 2020 – All rights reserved
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ISO/FDIS 19659-2:2020(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www .iso .org/ patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see www .iso .org/

iso/ foreword .html.

This document was prepared by Technical Committee ISO/TC 269, Railway applications, Subcommittee

SC 2, Rolling Stock.
A list of all parts in the ISO 19659 series can be found on the ISO website.

Any feedback or questions on this document should be directed to the user’s national standards body. A

complete listing of these bodies can be found at www .iso .org/ members .html.
© ISO 2020 – All rights reserved v
---------------------- Page: 5 ----------------------
ISO/FDIS 19659-2:2020(E)
Introduction

Thermal comfort is the condition that expresses satisfaction with the thermal environment. This is

mostly reached, if the heat generated by the human metabolism is allowed to dissipate in every part

of the human body in order to maintain thermal equilibrium with the surroundings. Since the heat

generated by the human metabolism is individual, the satisfaction with the thermal comfort condition

is also individual.

The main factors that influence thermal comfort locally at every part of the human body are physical

activity, clothing insulation, air temperature, mean radiant temperature, air velocity and relative

humidity. A satisfying thermal equilibrium can be reached in various combinations of the mentioned

factors. Therefore, it is not possible to specify an independent optimum of a single factor, like air

temperature, mean radiant temperature, air velocity or relative humidity.

ISO 7730 presents methods for predicting the general thermal sensation and degree of thermal

satisfaction of people exposed to moderate thermal environments in buildings.

The thermal comfort sensation in railway vehicles is in addition strongly affected by temporary factors.

Passengers enter the vehicle coming from an environment with a different thermal condition and with

an individual physical activity level. Thermal comfort sensation is then temporary depending on the

thermal equilibrium and comfort sensation generated in the environment where they are coming from.

In hot weather conditions, passengers who travel just for some minutes in an urban train typically

prefer lower temperatures and higher air velocities than passengers who travel for some hours in a

long-distance train. Further, whether passengers adapt their clothing during their stay in the vehicle is

of additional influence.

The thermal comfort which can be offered is also affected by temporary factors. The interaction of the

vehicle with the environment influences the thermal condition in the occupied areas in a dynamic way.

Door openings in train stations, rapidly changing outside weather conditions, rapidly changing degree

of occupation cannot be balanced promptly by the installed HVAC system.

The mentioned combinations of air temperature, mean radiant temperature, air velocity and relative

humidity are furthermore limited by the high grade of occupation, high air volume exchange rate, short

distance between passenger and surrounding surfaces and other technical constraints of a railway

vehicle.

This document takes into account these special conditions in railway vehicles. It deals with the

influence of the exterior climatic condition on the dimensioning of the HVAC system, the air quality, and

the measurement methods in order to achieve adequate thermal comfort. This document also considers

specific areas in railway vehicles, such as sanitary rooms, entrance areas and galleries.

This document describes the parameters and requirements in general which should be taken into

account when designing and testing an HVAC-system for railway vehicles. This document also describes

guidelines to specify conditions, performance values and the comfort parameter measurement

methods, but does not specify detailed pass and fail criteria for comfort requirements or any other

technical property of the railway vehicles.

These specifications are designed to be considered together with the national/regional standards,

which take into account different preferences, local weather and operational conditions.

vi © ISO 2020 – All rights reserved
---------------------- Page: 6 ----------------------
FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 19659-2:2020(E)
Railway applications — Heating, ventilation and air
conditioning systems for rolling stock —
Part 2:
Thermal comfort
1 Scope

This document specifies a general approach for achieving thermal comfort for passenger compartments

or saloons of railway vehicles (single level or double-decker) such as main line, regional/suburban and

urban vehicles used in public transportation services.

This document also describes guidelines to specify conditions, performance values and the comfort

parameter measurement methods for compartments, saloons and local annexes.
This document does not apply to the thermal comfort of the cab driver.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 19659-1, Railway applications — Heating, ventilation and air conditioning systems for rolling stock —

Part 1: Terms and definitions
3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 19659-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
4 Category of passenger railway vehicles
4.1 General

For the needs of this document, passenger railway vehicles are categorized into three types that

consider average passenger travel time and average time between station stops next to each other. The

following subclauses, 4.2, 4.3 and 4.4, are helpful for choosing the category.

NOTE The ability to achieve thermal comfort is influenced by the type of train. It is not practicable to take

a level of thermal comfort of one vehicle category and apply it to a different vehicle category. For example, it is

generally not feasible to provide the higher level of thermal comfort of a main line train in an urban train.

4.2 Category 1 (e.g. main line, intercity, long-distance, high speed)

Passenger railway vehicles are typically used in long-distance transit services between major cities

and/or regions of a country and sometimes across several countries. They have toilets and often have

© ISO 2020 – All rights reserved 1
---------------------- Page: 7 ----------------------
ISO/FDIS 19659-2:2020(E)

food service facilities, such as a dining car or a restaurant car. Passenger railway vehicles travelling

overnight also sometimes have sleeping cars. Passenger coach interiors are typically fitted with

comfortably spaced and configured seating and separated by interior doors from the vestibule.

The average passenger travel time is typically more than 30 minutes and the average time between

consecutive station stops is typically 15 to 30 minutes or more.
4.3 Category 2 (e.g. suburban, commuter, regional)

Passenger railway vehicles are typically used in medium-distance transit services between cities

and suburban areas or between smaller communities along the line or at the outer rim of a suburban

belt. Passenger coach interiors are normally equipped with high-density seating with proportionately

limited space for standing passengers. The average passenger travel time is typically more than

20 minutes and the average time between consecutive station stops is typically 5 to 10 minutes.

4.4 Category 3 (e.g. urban, LRV, tram, metro/subway)

Passenger railway vehicles are typically used in high-density urban passenger transportation services.

Passenger coach interiors are normally equipped with limited seating with a proportionately large

space for standing passengers. The average passenger travel time is typically less than 20 minutes and

the average time between consecutive station stops is typically 1 to 5 minutes.
5 Design conditions
5.1 General

Exterior/interior boundary conditions, under which the comfort parameters shall be achieved, shall be

specified as the design conditions in the technical specification.

Since exterior/interior design conditions depend on local climatological conditions, this document does

not give specific values for exterior/interior design conditions. It is recommended to use values taken

from relevant national/regional standards, literature or existing meteorological data. In case such

values are not available, this documen
...

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