oSIST prEN 14750:2022

Railway applications - Air conditioning for urban, suburban and regional rolling stock - Comfort parameters and type tests

This European Standard establishes thermal comfort parameters for passenger compartments or saloons of railway vehicles. These comfort parameters apply in a similar way to the areas reserved for train staff.
The standard also specifies conditions, performance values and the comfort parameter validation methods for compartments or saloons.
This European Standard is applicable to urban (metro, tramway), suburban and/or regional vehicles equipped with cooling and/or heating/ventilation systems. It does not apply to main line vehicles and driver's cabs which are considered in separate European Standards.

Bahnanwendungen - Luftbehandlung in Schienenfahrzeugen des städtischen-, Vorort- und Regionalverkehrs - Behaglichkeitsparameter und Typprüfungen

Applications ferroviaires - Conditionnement de l'air pour matériel roulant urbain, banlieue et régionaux - Paramètres de bien-être et essais de type

Le présent document établit les paramètres de confort thermique pour les compartiments voyageurs ou les salles des voitures ferroviaires. Les paramètres de confort s’appliquent d’une façon analogue aux locaux réservés au personnel d’accompagnement du train.
Ce document précise également les conditions, les valeurs de performance et les méthodes de validation des paramètres de confort pour les compartiments ou les salons.
Ce document est applicable aux véhicules urbains (métro, tramway), de banlieue et/ou régionaux équipés de systèmes de réfrigération et/ou de chauffage/ventilation. Le présent document ne s’applique pas aux véhicules de grandes lignes et les cabines de conduite qui font l’objet de Normes européennes spécifiques.

Železniške naprave - Klimatske naprave v železniških vozilih za mestni, primestni in regionalni promet - Parametri za določanje udobja in preskusi tipa

General Information

• Status: Not Published
• Public Enquiry End Date: 31-Dec-2022
• ICS: 13.040.20 - Ambient atmospheres
• ICS: 23.120 - Ventilators. Fans. Air-conditioners
• ICS: 45.060.01 - Railway rolling stock in general
• ICS: 45.140 - Metro, tram and light rail equipment
• Technical Committee: IŽNP - Reilway applications
• Current Stage: 4020 - Public enquire (PE) (Adopted Project)
• Start Date: 28-Oct-2022
• Due Date: 17-Mar-2023
• Completion Date: 06-Jan-2023
• Directive: 2008/57/EC - Directive 2008/57/EC of the European Parliament and of the Council of 17 June 2008 on the interoperability of the rail system within the Community (Recast)
• Directive: 2016/797/EU - Directive (EU) 2016/797 of the European Parliament and of the Council of 11 May 2016 on the interoperability of the rail system within the European Union (Text with EEA relevance)
• Mandate: M/486 - Mandate for programming and standardisation addressed to the European standardisation bodies in the field of urban rail
• Ref Project: prEN 14750 - Railway applications - Air conditioning for urban, suburban and regional rolling stock : Comfort parameters and type tests

Relations

• Revised: SIST EN 14750-1:2006 - Railway applications - Air conditioning for urban and suburban rolling stock - Part 1: Comfort parameters
• Effective Date: 20-Oct-2021
• Revised: SIST EN 14750-2:2006 - Railway applications - Air conditioning for urban and suburban rolling stock - Part 2: Type tests
• Effective Date: 20-Oct-2021
• Revised: SIST EN 14750-1:2006 - Railway applications - Air conditioning for urban and suburban rolling stock - Part 1: Comfort parameters
• Effective Date: 18-Jan-2023
• Revised: SIST EN 14750-2:2006 - Railway applications - Air conditioning for urban and suburban rolling stock - Part 2: Type tests
• Effective Date: 18-Jan-2023
• Revised: SIST EN 14750-1:2006 - Railway applications - Air conditioning for urban and suburban rolling stock - Part 1: Comfort parameters
• Effective Date: 19-Jan-2023
• Revised: SIST EN 14750-2:2006 - Railway applications - Air conditioning for urban and suburban rolling stock - Part 2: Type tests
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 14750:2022
01-december-2022
Železniške naprave - Klimatske naprave v železniških vozilih za mestni, primestni
in regionalni promet - Parametri za določanje udobja in preskusi tipa
Railway applications - Air conditioning for urban, suburban and regional rolling stock -
Comfort parameters and type tests
Bahnanwendungen - Luftbehandlung in Schienenfahrzeugen des städtischen-, Vorort-
und Regionalverkehrs - Behaglichkeitsparameter und Typprüfungen
Applications ferroviaires - Conditionnement de l'air pour matériel roulant urbain, banlieue
et régionaux - Paramètres de bien-être et essais de type
Ta slovenski standard je istoveten z: prEN 14750
ICS:
23.120 Zračniki. Vetrniki. Klimatske Ventilators. Fans. Air-
naprave conditioners
45.060.01 Železniška vozila na splošno Railway rolling stock in
general
oSIST prEN 14750:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 14750:2022

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oSIST prEN 14750:2022


DRAFT
EUROPEAN STANDARD
prEN 14750
NORME EUROPÉENNE

EUROPÄISCHE NORM

October 2022
ICS 13.040.20; 45.140 Will supersede EN 14750-1:2006, EN 14750-2:2006
English Version

Railway applications - Air conditioning for urban,
suburban and regional rolling stock : Comfort parameters
and type tests
Applications ferroviaires - Conditionnement de l'air Bahnanwendungen - Luftbehandlung in
pour matériel roulant urbain, banlieue et régionaux - Schienenfahrzeugen des städtischen-, Vorort- und
Paramètres de bien-être et essais de type Regionalverkehrs - Behaglichkeitsparameter und
Typprüfungen
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 256.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations
which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.

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 supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 14750:2022 E
worldwide for CEN national Members.

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oSIST prEN 14750:2022
prEN 14750:2022 (E)
Contents Page

European foreword . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Parameter selection . 11
5 Vehicle categories . 11
6 Comfort parameters . 13
7 Quality limits . 13
8 Exterior conditions. 14
8.1 Generalities . 14
8.2 Mean exterior temperature range with comfort criteria . 14
8.3 Mean exterior temperature range with functional criteria . 15
9 Performance of the heating and cooling installations . 15
9.1 Design passenger load . 15
9.2 Heating . 15
9.3 Pre-heating . 15
9.4 Cooling . 16
9.5 Pre-cooling . 16
9.6 Stand by operation . 16
10 Control . 17
10.1 General. 17
10.2 Interior temperature setting (T ) . 17
ic
10.3 Interior temperature setting (T ) for vehicles without cooling . 17
ic
11 Comfort condition requirements . 17
11.1 Requirements for comfort zone. 17
11.1.1 Quality regulation for steady-state tests . 17
11.1.2 Quality of regulation for regulation tests . 21
11.1.3 Horizontal range of the extreme interior air temperatures (ΔT ) . 23
H
11.1.4 Vertical range of the extreme interior air temperatures (ΔT ) . 24
V
11.1.5 Temperatures of the surfaces surrounding the comfort zone . 24
11.1.6 Relative humidity for air-conditioned vehicle (RH ) . 26
im
11.1.7 Air speed (AS) . 26
11.2 Requirements for local annexes (T ) . 26
Localization
11.3 Air quantities and quality . 27
11.3.1 Outside air or fresh air . 27
11.3.2 Smoking vehicles . 27
11.3.3 Toilet . 27
11.3.4 Particle air filtration . 27
12 Complementary requirements . 27
12.1 Heat transfer coefficient (k) . 27
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12.1.1 General . 27
12.1.2 Standstill coefficient k of the vehicle . 27
12.2 Condensation . 28
12.3 Door opening/closing cycles . 28
12.4 Solar factor (g) of the windows . 29
12.5 Sealing against water and snow . 29
13 Validation . 29
13.1 General . 29
13.2 Test levels . 29
13.3 Selection of tested cars . 29
13.4 Assessment of comfort criteria based on simulation . 30
13.4.1 Introduction . 30
13.4.2 Comparison between test and simulation of the reference case . 31
13.4.3 Trainset validated by simulation . 31
14 Preliminary verifications . 32
15 Air movement tests . 32
15.1 General remarks . 32
15.2 Air flow rates . 32
15.3 Visualization of the air flow direction . 32
15.4 Air speed test . 32
15.4.1 Critical air speed . 32
15.4.2 Measurement of air speeds . 32
16 Climatic tests . 33
16.1 General remarks . 33
16.2 Pre-heating test . 33
16.2.1 Test level TL1 . 33
16.2.2 Test level TL2 and TL3 . 33
16.3 Pre-cooling test - Test level TL1 . 34
16.4 Regulation test . 34
16.5 Steady-state tests . 34
16.6 Tests at extreme exterior operating conditions . 35
16.7 Complementary tests . 35
16.7.1 Determination of the coefficient k . 35
16.7.2 Thermography . 39
17 Methods of measurement − Measuring instruments . 40
17.1 General remarks . 40
17.2 Temperatures . 40
17.2.1 Air temperature . 40
17.2.2 Surface temperatures. 40
17.3 Relative humidity . 40
17.4 Air speed . 40
17.5 Air flow rate . 40
17.6 Simulated speed of the vehicle . 40
17.7 Equivalent solar energy . 40
17.8 Energy consumption and power rating . 40
18 Characteristics of the test equipment . 41
18.1 General remarks . 41
18.2 Occupation . 41
18.3 Temperature and uniformity of the climatic chamber and climatic wind tunnel . 41
18.4 Relative exterior humidity . 41
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18.5 Simulation of exterior air speed . 42
18.5.1 Standstill tests . 42
18.5.2 Dynamic tests . 42
18.6 Equivalent solar energy . 42
18.6.1 General. 42
18.6.2 Solar load calculation . 42
18.6.3 Window area . 43
18.6.4 Wall area . 43
18.6.5 Roof area . 43
19 Distribution of measuring points . 44
19.1 General. 44
19.2 Comfort envelope temperature measuring points . 44
Annex A (normative) Parameters selection . 45
Annex B (normative) T Regulation curves for the interior temperature setting . 49
Annex C (normative) Acceptable air speed. 51
Annex D (normative) Maximum Relative interior humidity in the comfort envelope . 53
Annex E (normative) Heat emitted by a person . 55
Annex F (normative) Exterior conditions for climatic zones . 58
Annex G (normative) Fresh air flow . 60
G.1 General. 60
G.2 Vehicles with air conditioning installation . 60
G.2.1 Fresh air flow design . 60
G.2.2 Fresh air flow regulation . 60
G.2.3 Free cooling . 61
G.3 Vehicles with only heating and ventilation . 61
Annex H (normative) Test programme for TL1 . 62
Annex I (normative) Test programme for TL2 and TL3 . 64
Annex J (normative) Equivalent solar energy (Simulation of solar exposure) . 74
Annex K (normative) Location of the measuring points used for the determination of the
mean interior temperature in the comfort envelope (T ), horizontal (ΔT ) and
im H
vertical (ΔT ) range of the extreme interior air temperatures, floor surface
V
temperature (T _ ), relative interior humidity (RH ), interior CO concentration
S Fl im 2
(C ) in the comfort envelopes and local annexes . 75
im
Annex L (normative) Location of the measuring points used for the determination of
surface temperatures . 79
L.1 Floor (measurement of TS_Fl) . 79
L.2 Windows pane (measurement of T ) . 79
S_Win_Pa
L.3 Side wall (measurement of T ) . 79
S_Wal
L.4 Door (measurement of T ) . 79
S_Do
L.5 Seat (measurement of T ) . 79
S_Seat
Annex M (normative) Location of sensors in the climatic chamber . 82
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Annex N (informative) Coefficient k . 86
Annex O (normative) Calculation method of the comfort level CL. 87
Annex P (informative) Title of Annex A, e.g. Example of a table, a figure and a formula . 103
Annex Q (normative) Set-up of the simulation . 109
Annex R (informative) Abbreviations . 115
R.1 Surface temperatures: T . 115
S__Range_Surface concerned
R.2 Airflow: V� _ . 115
Type of airflow
R.3 Range of temperature: ΔT . 115
_Location
R.4 Comfort level and simulation . 116
R.5 Other. 116
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive (EU) 2016/797 aimed to be covered . 117
Bibliography . 118


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oSIST prEN 14750:2022
prEN 14750:2022 (E)
European foreword
This document (prEN 14750:2022) has been prepared by Technical Committee CEN/TC 256 “Railway
applications”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 14750-1:2006 and EN 14750-2:2006.
In comparison with the previous edition, the following technical modifications have been made:
— Creation of 3 categories of vehicle (Urban, Suburban and Regional) to define the corresponding
performances.
— Definition of normal and extreme range of exterior temperature with corresponding performances.
— Usage of an index (Comfort Level) to provide a global view of the climatic comfort.
— Improvement of the validation process with new regulation tests. The purpose is to check the
regulation of the system.
— Introduction of the process of validation of the climatic comfort parameters thanks simulations.
This document has been prepared under a Standardization Request given to CEN by the European
Commission and the European Free Trade Association, and supports essential requirements of EU
Directive(s) / Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral
part of this document.
6

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oSIST prEN 14750:2022
prEN 14750:2022 (E)
1 Scope
This document establishes thermal comfort parameters for passenger compartments or saloons of
railway vehicles. These comfort parameters apply in a similar way to the areas reserved for train staff.
This document also specifies conditions, performance values and the comfort parameter validation
methods for compartments or saloons.
This document is applicable to urban (metro, tramway), suburban and/or regional vehicles equipped
with cooling and/or heating/ventilation systems. It does not apply to main line vehicles and driver's
cabs which are considered in separate European Standards.
2 Normative references
The following documents are referred to in the text in such a way that some or all 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.
EN ISO 7726:2001, Ergonomics of the thermal environment - Instruments for measuring physical
quantities (ISO 7726:1998)
ISO 19659-1:2017, 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 19659-1:2017 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
NOTE Refer to informative Annex R for abbreviations.
3.1
air conditioning installation
all equipment of HVAC system involved to reach the thermal comfort
Note 1 to entry: Refer to ISO 19659-1:2017.
3.2
interior temperature setting
T
ic
target value for interior air temperature
3.3
normal interior temperature setting
T
ic,0
target value for interior air temperature according to regulation curve
Note 1 to entry: Refer to 10.2 and normative Annex B.
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oSIST prEN 14750:2022
prEN 14750:2022 (E)
3.4
interior temperature setting offset
T
ic,Off
adjustment of the interior temperature setting
Note 1 to entry: Refer to 10.2.
3.5
mean interior temperature
T
im
arithmetic mean of the interior temperatures of one comfort zone and measured 1,10 m above the floor
as specified in the procedure described in normative Annex K
3.6
mean exterior temperature
T
em
arithmetic mean of the exterior temperatures measured according to the procedure described in
nor
...