EN ISO 11079:2007
(Main)Ergonomics of the thermal environment - Determination and interpretation of cold stress when using required clothing insulation (IREQ) and local cooling effects (ISO 11079:2007)
Ergonomics of the thermal environment - Determination and interpretation of cold stress when using required clothing insulation (IREQ) and local cooling effects (ISO 11079:2007)
ISO 11079:2007specifies methods and strategies for assessing the thermal stress associated with exposure to cold environments. These methods apply to continuous, intermittent as well as occasional exposure and type of work, indoors and outdoors. They are not applicable to specific effects associated with certain meteorological phenomena (e.g. precipitation), which are assessed by other methods.
Ergonomie der thermischen Umgebung - Bestimmung und Interpretation der Kältebelastung bei Verwendung der erforderlichen Isolation der Bekleidung (IREQ) und lokalen Kühlwirkungen (ISO 11079:2007)
Diese Internationale Norm legt Verfahren und Strategien zur Beurteilung der thermischen Belastung fest, die mit dem Aufenthalt in Kälteumgebungen verbunden ist. Diese Verfahren gelten für eine ununterbrochene, eine unterbrochene sowie eine gelegentliche Exposition sowohl für Arbeiten in Innenräumen als auch im Freien. Sie sind nicht auf spezifische Wirkungen im Zusammenhang mit bestimmten meteorologischen Erscheinungen (z. B. Niederschlag) anwendbar, die nach anderen Verfahren beurteilt werden.
Ergonomie des ambiances thermiques - Détermination et interprétation de la contrainte liée au froid en utilisant l'isolement thermique requis du vêtement (IREQ) et les effets du refroidissement local (ISO 11079:2007)
L'ISO 11079:2007 expose des méthodes et des stratégies ayant pour but d'évaluer la contrainte thermique associée à l'exposition aux environnements froids. Ces méthodes s'appliquent aux expositions et aux types de travaux continus, intermittents et occasionnels, aussi bien en intérieur qu'à l'extérieur. Elles ne sont pas applicables aux effets spécifiques liés à certains phénomènes météorologiques (des précipitations, par exemple), qui sont évalués par d'autres méthodes.
Ergonomija toplotnega okolja - Ugotavljanje in razlaga obremenitev zaradi mraza ob uporabi zahtevanih zaščitnih oblačil (IREQ) in zaradi učinkov lokalnega ohlajevanja (ISO 11079:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-april-2008
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Ergonomics of the thermal environment - Determination and interpretation of cold stress
when using required clothing insulation (IREQ) and local cooling effects (ISO
11079:2007)
Ergonomie der thermischen Umgebung - Bestimmung und Interpretation der
Kältebelastung bei Verwendung der erforderlichen Isolation der Bekleidung (IREQ) und
lokalen Kühlwirkungen (ISO 11079:2007)
Ergonomie des ambiances thermiques - Détermination et interprétation de la contrainte
liée au froid en utilisant l'isolement thermique requis du vetement et les effets du
refroidissement local (ISO 11079:2007)
Ta slovenski standard je istoveten z: EN ISO 11079:2007
ICS:
13.180 Ergonomija Ergonomics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 11079
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2007
ICS 13.180 Supersedes ENV ISO 11079:1998
English Version
Ergonomics of the thermal environment - Determination and
interpretation of cold stress when using required clothing
insulation (IREQ) and local cooling effects (ISO 11079:2007)
Ergonomie des ambiances thermiques - Détermination et Ergonomie der thermischen Umgebung - Bestimmung und
interprétation de la contrainte liée au froid en utilisant Interpretation der Kältebelastung bei Verwendung der
l'isolement thermique requis du vêtement (IREQ) et les erforderlichen Isolation der Bekleidung (IREQ) und lokalen
effets du refroidissement local (ISO 11079:2007) Kühlwirkungen (ISO 11079:2007)
This European Standard was approved by CEN on 14 December 2007.
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 CEN 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 CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
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Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11079:2007: E
worldwide for CEN national Members.
Contents Page
Foreword.3
Foreword
This document (EN ISO 11079:2007) has been prepared by Technical Committee ISO/TC 159 "Ergonomics"
in collaboration with 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 June 2008, and conflicting national standards shall be withdrawn at
the latest by June 2008.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes ENV ISO 11079:1998.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11079:2007 has been approved by CEN as a EN ISO 11079:2007 without any modification.
INTERNATIONAL ISO
STANDARD 11079
First edition
2007-12-15
Ergonomics of the thermal
environment — Determination and
interpretation of cold stress when using
required clothing insulation (IREQ) and
local cooling effects
Ergonomie des ambiances thermiques — Détermination et
interprétation de la contrainte liée au froid en utilisant l'isolement
thermique requis du vêtement (IREQ) et les effets du refroidissement
local
Reference number
ISO 11079:2007(E)
©
ISO 2007
ISO 11079:2007(E)
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ii © ISO 2007 – All rights reserved
ISO 11079:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions and symbols. 2
4 Principles of methods for evaluation. 4
5 General cooling. 4
6 Local cooling. 10
7 Practical assessment of cold environments and interpretation. 11
Annex A (normative) Computation of thermal balance. 13
Annex B (informative) Physiological criteria in cold exposure . 16
Annex C (informative) Metabolic rate and thermal properties of clothing . 18
Annex D (informative) Determination of wind cooling . 21
Annex E (informative) Examples of evaluation of IREQ . 23
Annex F (informative) Computer program for calculating IREQ . 33
Bibliography . 34
ISO 11079:2007(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. 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.
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.
ISO 11079 was prepared by Technical Committee ISO/TC 159, Ergonomics, Subcommittee SC 5,
Ergonomics of the physical environment.
This first edition of ISO 11079 cancels and replaces the ISO/TR 11079:1993, of which it constitutes a
technical revision.
iv © ISO 2007 – All rights reserved
ISO 11079:2007(E)
Introduction
Wind chill is commonly encountered in cold climates, but it is low temperatures that first of all endanger body
heat balance. By proper adjustment of clothing, human beings can often control and regulate body heat loss,
to balance a change in the ambient climate. The method presented here is based therefore on the evaluation
of the clothing insulation required to maintain the thermal balance of the body in equilibrium. The heat balance
equation used takes into account the most recent scientific findings concerning heat exchanges at the surface
of the skin as well as the clothing.
INTERNATIONAL STANDARD ISO 11079:2007(E)
Ergonomics of the thermal environment — Determination and
interpretation of cold stress when using required clothing
insulation (IREQ) and local cooling effects
1 Scope
This International Standard specifies methods and strategies for assessing the thermal stress associated with
exposure to cold environments. These methods apply to continuous, intermittent as well as occasional
exposure and type of work, indoors and outdoors. They are not applicable to specific effects associated with
certain meteorological phenomena (e.g. precipitation), which are assessed by other methods.
2 Normative references
The following referenced documents are indispensable for the application 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 7726, Ergonomics of the thermal environment — Instruments for measuring physical quantities
ISO 8996, Ergonomics of the thermal environment — Determination of metabolic rate
ISO 9237, Textiles — Determination of permeability of fabrics to air
ISO 9920, Ergonomics of the thermal environment — Estimation of thermal insulation and water vapour
resistance of a clothing ensemble
ISO 13731, Ergonomics of the thermal environment — Vocabulary and symbols
ISO 13732-3, Ergonomics of the thermal environment — Methods for the assessment of human responses to
contact with surfaces — Part 3: Cold surfaces
ISO 15831, Clothing — Physiological effects — Measurement of thermal insulation by means of a thermal
manikin
EN 511, Protective gloves against cold
ISO 11079:2007(E)
3 Terms, definitions and symbols
For the purposes of this document, the terms and definitions given in ISO 13731 and the following terms,
definitions and symbols apply.
3.1 Terms and definitions
3.1.1
cold stress
climatic conditions under which the body heat exchange is just equal to or too large for heat balance at the
expense of significant and sometimes uncompensable physiological strain (heat debt)
3.1.2
heat stress
climatic conditions under which the body heat exchange is just equal to or too small for heat balance at the
expense of significant and sometimes uncompensable physiological strain (heat storage)
3.1.3
IREQ
required clothing insulation for the preservation of body heat balance at defined levels of physiological strain
3.1.4
thermoneutral zone
temperature interval within which the body maintains heat balance exclusively by vasomotor reactions
3.1.5
wind chill temperature
temperature related to the cooling effect on a local skin segment
3.2 Symbols
A Dubois body surface area, m
Du
-2 −1
ap air permeability, l ⋅ m ⋅ s
−2
C convective heat flow (exchange), W ⋅ m
−1
c water latent heat of vaporization, J ⋅ kg
e
−1 −1
c specific heat of dry air at constant pressure, J ⋅ kg ⋅ K
p
−2
C respiratory convective heat flow (loss), W ⋅ m
res
D duration limited exposure,
...
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