Effect of cooling vest on heat and humidity transfer of stab-resistant body armor

doi:10.16265/j.cnki.issn1003-3033.2020.03.027

Abstract

Abstract: In order to quantitatively study the heat and moisture transfer performance of SRBA and improve the thermal comfort of SRBA, a thermal manikin was used to measure and analyze thermal insulation and evaporative resistance of cooling vest, SRBA and both stacks at different temperatures (25, 30, 40 ℃) and humidity (40%, 55%, 70%). It is found that the thermal insulation changes at the three temperatures measured as SRBA> both stacks > cooling vest, and the evaporative resistance follows this characteristic above 30 ℃, that the higher the temperature is, the greater the effect of the cooling vest on the heat transfer efficiency of the SRBA will be, and that the thermal insulation can be reduced by up to 46.75% and the evaporative resistance can be reduced up to 82.97%. The results show that at higher ambient temperature (＞30 ℃), the cooling vest can effectively reduce the thermal insulation and evaporative resistance of the SRBA and improve the heat and moisture transfer efficiency, and that the influence of the cooling vest on the heat and moisture transfer of the SRBA changes with the ambient temperature, humidity and design characteristics.

Key words: cooling vest, stab-resistant body armor (SRBA), thermal insulation, evaporative resistance, thermal manikin

CLC Number:

X924.4

LI Nan, CHANG Suqin, GUO Zerong, HE Jingjie, YUAN Mengqi. Effect of cooling vest on heat and humidity transfer of stab-resistant body armor[J]. China Safety Science Journal, 2020, 30(3): 178-184.

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