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Cooling vest incorporated with phase change materials (PCMs): how much benefit is there?

Zhao, M; Wang, Faming LU and Gao, Chuansi LU (2012) The 5th European Conference on Protective Clothing and NOKOBETEF 10(ECPC) p.1-4
Abstract
The aim of this study was to investigate torso cooling benefit of various PCM vests in a simulated warm environment (Ta= 34 °C, RH=56 %, Va=0.4 m/s). A pre-wetted cotton torso fabric skin was used to simulate sweating on a thermal manikin (Tmanikin=34 °C). Six conditions were tested: nude fabric skin (Fabric Skin), Vest A without (VA) and with frozen gels with a melting temperature (Tm) of 0 °C (VA+Gel), Vest B without (VB) and with PCMs of Tm=21 °C (VB+PCM21) and Vest B with PCMs of Tm=24 °C (VB+PCM24). Cooling benefits for the three vests were: 10 W/m2 (VA+Gel), -49 W/m2 (VB+PCM21) and -52 W/m2 (VB+PCM24). The restricted evaporation rates were: 97 g/h (VA+Gel), 80 g/h (VB+PCM21), and 75 g/h (VB+PCM24). Torso fabric skin temperature was... (More)
The aim of this study was to investigate torso cooling benefit of various PCM vests in a simulated warm environment (Ta= 34 °C, RH=56 %, Va=0.4 m/s). A pre-wetted cotton torso fabric skin was used to simulate sweating on a thermal manikin (Tmanikin=34 °C). Six conditions were tested: nude fabric skin (Fabric Skin), Vest A without (VA) and with frozen gels with a melting temperature (Tm) of 0 °C (VA+Gel), Vest B without (VB) and with PCMs of Tm=21 °C (VB+PCM21) and Vest B with PCMs of Tm=24 °C (VB+PCM24). Cooling benefits for the three vests were: 10 W/m2 (VA+Gel), -49 W/m2 (VB+PCM21) and -52 W/m2 (VB+PCM24). The restricted evaporation rates were: 97 g/h (VA+Gel), 80 g/h (VB+PCM21), and 75 g/h (VB+PCM24). Torso fabric skin temperature was reduced by 1.6 °C (VA+Gel), 1.2 °C (VB+PCM21) and 0.2 °C (VB+PCM24). The results revealed that all the cooling vests presented negative benefits in a simulated work activity and environmental condition. The observed positive benefit could be only found on reducing local torso skin temperature. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to conference
publication status
published
subject
keywords
Fabric skin, Sweat evaporation, PCMs, Cooling vest
pages
4 pages
conference name
The 5th European Conference on Protective Clothing and NOKOBETEF 10(ECPC)
language
English
LU publication?
yes
id
d35a4e60-6579-4685-af41-1807afef01d3 (old id 2518367)
date added to LUP
2012-07-06 09:21:56
date last changed
2016-04-16 11:14:18
@misc{d35a4e60-6579-4685-af41-1807afef01d3,
  abstract     = {The aim of this study was to investigate torso cooling benefit of various PCM vests in a simulated warm environment (Ta= 34 °C, RH=56 %, Va=0.4 m/s). A pre-wetted cotton torso fabric skin was used to simulate sweating on a thermal manikin (Tmanikin=34 °C). Six conditions were tested: nude fabric skin (Fabric Skin), Vest A without (VA) and with frozen gels with a melting temperature (Tm) of 0 °C (VA+Gel), Vest B without (VB) and with PCMs of Tm=21 °C (VB+PCM21) and Vest B with PCMs of Tm=24 °C (VB+PCM24). Cooling benefits for the three vests were: 10 W/m2 (VA+Gel), -49 W/m2 (VB+PCM21) and -52 W/m2 (VB+PCM24). The restricted evaporation rates were: 97 g/h (VA+Gel), 80 g/h (VB+PCM21), and 75 g/h (VB+PCM24). Torso fabric skin temperature was reduced by 1.6 °C (VA+Gel), 1.2 °C (VB+PCM21) and 0.2 °C (VB+PCM24). The results revealed that all the cooling vests presented negative benefits in a simulated work activity and environmental condition. The observed positive benefit could be only found on reducing local torso skin temperature.},
  author       = {Zhao, M and Wang, Faming and Gao, Chuansi},
  keyword      = {Fabric skin,Sweat evaporation,PCMs,Cooling vest},
  language     = {eng},
  pages        = {1--4},
  title        = {Cooling vest incorporated with phase change materials (PCMs): how much benefit is there?},
  year         = {2012},
}