Advanced

New algorithms for prediction of wind effects on cold protective clothing

Nilsson, Håkan O.; Anttonen, Hannu and Holmér, Ingvar LU (2000) Ergonomics of Protective Clothing. NOKOBETEF 6, The 1st European Conference on Protective Clothing (ECPC 1) In Arbete och hälsa p.17-20
Abstract
The European Pre-Standard for protective clothing against cold ENV 342:1998 suggests that the testing of thermal insulation should be made on a moving thermal manikin. In this way the value can be used to match requirements specified by the IREQ-method or as realistic input for prediction of thermal stress in other standards. It is known from prior work that insulation values measured with human subjects can be reduced by up to 70 % from the value measured on a standing thermal manikin.

This paper will focus on the principals of reduction made on total insulation calculated according to methods presented in ENV 342:1998. A general reduction equation that takes into account the insulation reduction effects from wind, permeability... (More)
The European Pre-Standard for protective clothing against cold ENV 342:1998 suggests that the testing of thermal insulation should be made on a moving thermal manikin. In this way the value can be used to match requirements specified by the IREQ-method or as realistic input for prediction of thermal stress in other standards. It is known from prior work that insulation values measured with human subjects can be reduced by up to 70 % from the value measured on a standing thermal manikin.

This paper will focus on the principals of reduction made on total insulation calculated according to methods presented in ENV 342:1998. A general reduction equation that takes into account the insulation reduction effects from wind, permeability and walk has been developed. The equation makes it possible to calculate the reduction of different activity and weather conditions for most winter work clothing, if the static clothing insu-lation is known from measurements or tables.

Three different permeability classes are suggested high (> 100 l/m2s), medium (5 - 100 l/m2s) and low (< 5 l/m2s) air permeability. The air permeability has little influence on the insulation for wind speed below 2 m/s. For calculations below this limit the air perme-ability could be omitted. In the future only measurements on standing manikin should be needed. The wind, permeability and walk reductions will be produced with correction equations. To validate these relationships more measurements on subjects exposed to wind and motion in working life are needed.

The Swedish Council for Work Life Research and Finnish Work Environment Fund has supported this work. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
Arbete och hälsa
editor
Kuklane, Kalev; Holmér, Ingvar; and
issue
2000:8
pages
4 pages
publisher
National Institute for Working Life
conference name
Ergonomics of Protective Clothing. NOKOBETEF 6, The 1st European Conference on Protective Clothing (ECPC 1)
ISSN
0346-7821
ISBN
91-7045-559-7
language
English
LU publication?
no
id
576300b0-dfca-47b1-8b3f-c9dabe836903 (old id 709089)
alternative location
http://hdl.handle.net/2077/4246
date added to LUP
2008-09-30 14:13:41
date last changed
2016-04-16 04:22:37
@inproceedings{576300b0-dfca-47b1-8b3f-c9dabe836903,
  abstract     = {The European Pre-Standard for protective clothing against cold ENV 342:1998 suggests that the testing of thermal insulation should be made on a moving thermal manikin. In this way the value can be used to match requirements specified by the IREQ-method or as realistic input for prediction of thermal stress in other standards. It is known from prior work that insulation values measured with human subjects can be reduced by up to 70 % from the value measured on a standing thermal manikin.<br/><br>
This paper will focus on the principals of reduction made on total insulation calculated according to methods presented in ENV 342:1998. A general reduction equation that takes into account the insulation reduction effects from wind, permeability and walk has been developed. The equation makes it possible to calculate the reduction of different activity and weather conditions for most winter work clothing, if the static clothing insu-lation is known from measurements or tables.<br/><br>
Three different permeability classes are suggested high (&gt; 100 l/m2s), medium (5 - 100 l/m2s) and low (&lt; 5 l/m2s) air permeability. The air permeability has little influence on the insulation for wind speed below 2 m/s. For calculations below this limit the air perme-ability could be omitted. In the future only measurements on standing manikin should be needed. The wind, permeability and walk reductions will be produced with correction equations. To validate these relationships more measurements on subjects exposed to wind and motion in working life are needed.<br/><br>
The Swedish Council for Work Life Research and Finnish Work Environment Fund has supported this work.},
  author       = {Nilsson, Håkan O. and Anttonen, Hannu and Holmér, Ingvar},
  booktitle    = {Arbete och hälsa},
  editor       = {Kuklane, Kalev and Holmér, Ingvar},
  isbn         = {91-7045-559-7},
  issn         = {0346-7821},
  language     = {eng},
  number       = {2000:8},
  pages        = {17--20},
  publisher    = {National Institute for Working Life},
  title        = {New algorithms for prediction of wind effects on cold protective clothing},
  year         = {2000},
}