Ergonomics of the thermal environment - Estimation of the thermal insulation and evaporative resistance of a clothing ensemble (ISO 9920:1995)

Migrated from Progress Sheet (TC Comment) (2000-07-10): The scope mentioned in the draft BP will be added at the deadline of the PQ : ++ 1999-05-05 (TA/981211) ++ New stage 49 in BP (bli 991222)

Ergonomie des Umgebungsklimas - Abschätzung der Wärmeisolation und des Verdunstungswiderstandes einer Bekleidungskombination (ISO 9920:1995)

Diese Internationale Norm legt Verfahren zur Abschätzung der thermischen Kennwerte (Widerstand gegen den Verlust an trockener Wärme und Verdunstungswiderstand) unter stationären Prüfbedingungen für eine Bekleidungskombination fest. Die Verfahren basieren auf bekannten Werten für Kleidungsstücke, Bekleidungs-kombinationen und Textilien.
Der Einfluss von Körperbewegungen und der Einfluss des Luftdurchgangs durch die Kleidung auf die Wärmeisolation und den Verdunstungswiderstand wird diskutiert.
Diese Internationale Norm
- behandelt nicht andere Wirkungen der Bekleidung wie Wasseraufnahme, Pufferwirkung und Trage-komfort;
- berücksichtigt nicht den Einfluss von Regen und Schnee auf die thermischen Kennwerte;
- berücksichtigt nicht spezielle Schutzkleidungen (wasser- oder luftgekühlte Anzüge, beheizte Kleidung);
- behandelt nicht die örtliche Wärmeisolation an verschiedenen Körperteilen und den Behaglichkeitsverlust infolge der asymmetrischen Verteilung der Bekleidungskombination.

Ergonomie des ambiances thermiques - Détermination de l'isolement thermique et de la résistance a l'évaporation d'une tenue vestimentaire (ISO 9920:1995)

L'IEC 60092-360:2014 spécifie les exigences relatives aux caractéristiques électriques, mécaniques et particulières des matériaux d'isolation et de gainage destinés à être utilisés dans des câbles d'alimentation, de commande, d'instrumentation et de télécommunication installés à bord des navires et des unités fixes et mobiles en mer. Cette première édition annule et remplace l'IEC 60092-351 Ed. 3 parue en 2004 et l'IEC 60092-359 Ed. 1 parue en 1987, Amendement 1:1994 et Amendement 2:1992. Cette édition constitue une révision technique.

Ergonomija toplotnega okolja – Ocena toplotne izolativnosti in izparilne odpornosti oblačil (ISO 9920:1995)

General Information

Status
Withdrawn
Publication Date
31-May-2004
Withdrawal Date
04-Feb-2008
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
25-Jan-2008
Due Date
17-Feb-2008
Completion Date
05-Feb-2008

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SLOVENSKI STANDARD
01-junij-2004
1DGRPHãþD
SIST ISO 9920:2001
(UJRQRPLMDWRSORWQHJDRNROMD±2FHQDWRSORWQHL]RODWLYQRVWLLQL]SDULOQH
RGSRUQRVWLREODþLO ,62
Ergonomics of the thermal environment - Estimation of the thermal insulation and
evaporative resistance of a clothing ensemble (ISO 9920:1995)
Ergonomie des Umgebungsklimas - Abschätzung der Wärmeisolation und des
Verdunstungswiderstandes einer Bekleidungskombination (ISO 9920:1995)
Ergonomie des ambiances thermiques - Détermination de l'isolement thermique et de la
résistance a l'évaporation d'une tenue vestimentaire (ISO 9920:1995)
Ta slovenski standard je istoveten z: EN ISO 9920:2003
ICS:
13.180 Ergonomija Ergonomics
61.020 2EODþLOD Clothes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 9920
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2003
ICS 13.040.20; 13.180; 61.020
English version
Ergonomics of the thermal environment - Estimation of the
thermal insulation and evaporative resistance of a clothing
ensemble (ISO 9920:1995)
Ergonomie des ambiances thermiques - Détermination de Ergonomie des Umgebungsklimas - Abschätzung der
l'isolement thermique et de la résistance à l'évaporation Wärmeisolation und des Verdunstungswiderstandes einer
d'une tenue vestimentaire (ISO 9920:1995) Bekleidungskombination (ISO 9920:1995)
This European Standard was approved by CEN on 7 August 2003.
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. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Management Centre or to any CEN member.
This European Standard exists 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9920:2003 E
worldwide for CEN national Members.

Foreword
The text of ISO 9920:1995 has been prepared by Technical Committee ISO/TC 159
"Ergonomics" of the International Organization for Standardization (ISO) and has been taken over
as EN ISO 9920:2003 by Technical Committee CEN/TC 122 "Ergonomics", the secretariat of
which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by February 2004, and conflicting national
standards shall be withdrawn at the latest by February 2004.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and
the United Kingdom.
Endorsement notice
The text of ISO 9920:1995 has been approved by CEN as EN ISO 9920:2003 without any
modifications.
INTERNATIONAL
Is0
STANDARD
First edition
1995-03-01
Ergonomics of the thermal
environment - Estimation of the thermal
insulation and evaporative resistance of a
clothing ensemble
Ergonomie des ambiances thermiques
- D6 termina tion de I ‘isolemen t
thermique et de la r&stance ;i 1 ’8vaporation d ’une tenue vestimentaire
Reference number
IS0 9920:1995(E)
IS0 9920:1995(E)
Contents
Page
1 Scope . . 1
2 Principles and general definitions . . 1
3 Estimation of the t hermal insulation of a clothing ensemble
on
tables with va lues measu red on standing thermal manikin
4 Estimation of the clothing area factor
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5 Influence of body movements and wind on the thermal insulation of
a clothing ensemble . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .*.
6 Estimation of the evaporative resistance
Annexes
A Thermal insulation values for clothing ensembles
. . . . . . . . . . . . . . . . . . 5
B Thermal insulation values for individual garments . . . . . . . . . . . . . . . . . 20
C Measurement of the thermal insulation of clothin on a thermal
manikin 47
D Measurement of the th ermal insu ation and eva pora tive resistance
of a clothing e nsemble on hu man subje ts . . . . . . . . . . . . . . . . . . . . . 49
E Different expressions for the thermal insulation of clothing 50
F Evaporative resistance of a clothing ensemble 52
0 IS0 1995
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopyrng and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii
0 IS0
IS0 9920: 1995(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation of national standards bodies (IS0 member bodies). The work
of preparing International Standards is normally carried out through IS0
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. IS0
collaborates closely with the International Electrotechnical Commission
(IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 9920 was prepared by Technical Committee
ISO/TC 159, Ergonomics, Subcommittee SC 5, Ergonomics of the physi-
cal environment.
Annexes A and B form an integral part of this International Standard. An-
nexes C, D, E and F are for information only.
. . .
III
0 IS0
IS0 9920: 1995(E)
Introduction
This International Standard is one of a series of International Standards
intended for use in the study of thermal environments. It is a basic docu-
ment for evaluation of the thermal characteristics of a clothing ensemble
(thermal insulation and evaporative resistance). It is necessary to know
these values when evaluating the thermal stress or degree of comfort
provided by the physical environment according to standardized methods.
The thermal characteristics determined in this International Standard are
values for steady-state conditions. Properties like “buffering ”, adsorption
of water, etc., are not dealt with.
This International Standard does not deal with the local thermal insulation
on different body parts, nor the discomfort due to a nonuniform distri-
bution of the clothing on the body.
Man ’s thermal balance in neutral, cold and warm environments is influ-
enced by the clothing worn. For evaluating the thermal stress on man in
the cold [IREQ (see lSO/TR 11079) insulation index], neutral [PMV-PPD
(see IS0 7730) indices] and heat [required sweat rate (see IS0 7933)
index], it is necessary to know the thermal characteristics of the clothing
ensemble, i.e. the thermal insulation (ZC,) and the evaporative resistance
T-
CR >
Until now, very few data are available on the evaporative resistance of a
clothing ensemble. This International Standard mainly deals with the esti-
mation of the thermal resistance to dry heat loss.

INTERNATIONAL STANDARD 0 IS0
IS0 9920: 1995(E)
Ergonomics of the thermal environment - Estimation
of the thermal insulation and evaporative resistance
of a clothing ensemble
1 Scope t,k - &I
--
I . . .
(1)
cl- H
This International Standard specifies methods for es-
where
timating the thermal characteristics (resistance to dry
heat loss and evaporative heat loss) in steady-state
H is the dry heat loss per square metre of skin
conditions for a clothing ensemble based on values
area, in watts per square metre;
for known garments, ensembles and textiles.
is the mean skin temperature, in degrees
t,k
The influence of body movement and air penetration
Celsius;
on the thermal insulation and evaporative resistance
is discussed.
is the mean surface temperature of the
Cl
clothed person, in degrees Celsius.
This International Standard
This definition of clothing insulation also includes the
- does not deal with other effects of clothing, such
uncovered parts of the body like head and hands, i.e.
as adsorption of water, buffering, tactile comfort;
the mean surface temperature of the clothed person
is not only influenced by clothing surface tempera-
- does not take into account the influence of rain
ture, but also by the skin temperature of the un-
and snow on the thermal characteristics;
clothed parts of the body.
- does not consider special protective clothing
Due to this special definition of the thermal insulation
(water-cooled suits, ventilated suits, heated cloth-
including also unclothed parts, it is convenient to use
ing);
the clo unit for the thermal insulation of a clothing
(I cl0 = 0,155 m** ‘C/W) .
- does not deal with the separate insulation on dif-
ferent parts of the body and discomfort due to the
The equations in this International Standard are mainly
asymmetry of a clothing ensemble.
given in SI units. For information, the same equations
may also be given using the clo-unit for thermal insu-
lation. Annexes C and D describe how the thermal
insulation can be measured.
2 Principles and general definitions
The dry heat loss from the body (convection, radiation,
In this International Standard, the thermal insulation
conduction) takes place from the skin surface through
(resistance to dry heat loss from the body) of a cloth-
the clothing to the clothing surface. The resistance to
ing ensemble is expressed as the basic clothing insu-
this heat flow is expressed by the thermal insulation,
lation, Ic,, expressed in square metre degrees Celsius
per watt (m*= ‘C/W), which is the insulation from the
Cl.
skin to the clothing surface:
IS0 9920: 1995(E) 0 IS0
Then the dry heat loss is transferred from the
3 Estimation of the thermal insulation
clothing/skin surface to the environment. The resist-
of a clothing ensemble based on tables
ante to this heat flow is expressed by the surface
with values measured on standing
resistance between clothing/skin and environment,
thermal manikin
Ia, expressed in square metre degrees Celsius per
watt (m*= ‘C/W).
3.1 General
. . .
4l = 1 I (h, + hr>
(2)
In annex A, Ic, values are listed for a selection of
clothing ensembles. All of the values were measured
on a standing thermal manikin. A short description of
h, is the convective heat loss coefficient, in
the clothing ensembles is given and thef,, values are
watts per square metre degree Celsius;
also listed. The total clothing mass is based on gar-
h, is the radiant heat loss coefficient, in watts ments which fit a standard person (European male
per square metre degree Celsius. size 52) and it does not include shoes.
TableA. is used for finding a clothing ensemble
& is influenced by air velocity, clothing/skin surface
which is comparable with the actual clothing ensem-
temperature, air temperature and mean radiant tem-
ble. Interpolation between the thermal insulation of
perature.
two ensembles may be used. Annex A can also be
used to predict which types of clothing can be used
Clause 3 presents procedures for estimating the
to obtain a given thermal insulation.
thermal insulation, &,, for a clothing ensemble based
on existing values measured by a standing thermal
A number is listed for each of the individual garments
manikin.
making up most of the ensembles. This number re-
fers to annex B, where a more detailed description
When measuring the thermal insulation value Zc, or
of the individual garments is presented.
when estimating the heat loss from the human body,
it is necessary to know the clothing area factor, fc,,
The insulation for the entire clothing, Ic, (in m2moC/W
defined as the ratio of the surface area of the clothed
or clo), may also be estimated using the following
body, A,, (including unclothed parts) to the surface of
empirical equation:
the nude body, A,, (Du Bois area):
. . .
(3) I
fcl = Acl/ADu (fcl 2 I> I . . .
(4)
cl = CIU
c
A photographic method for estimatingf,, is described
where IclU is the thermal insulation of various individual
in clause 4 together with a simplified equation for
garments making up the ensemble, in square metre
estimating it.
degrees Celsius per watt or in clo.
The posture and body movements of the wearer
3.2 Thermal insulation values for individual
(pumping effect) and the penetration of air through
garments
the clothing due to increased air velocity will change
the thermal insulation> of a clothing ensemble. This
See annex B.
influence of activity and air velocity is discussed in
clause 5.
The thermal insulation, IclU, (in m*= ‘C/W or clo) of in-
I
dividual garments making up the ensemble (see
A thermal manikin is often used to measure the ther-
tabl
...

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