| PHYSICS AND ENGINEERING PHYSICS |
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Experimental investigation of the thermal insulation and evaporative resistance of protective clothing on a thermal manikin in a hot environment |
| FU Ming, WENG Wenguo, HAN Xuefeng |
| Institute of Public Safety Research, Department of Engineering Physics, Tsinghua University, Beijing 100084, China |
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Abstract The thermal insulation and evaporative resistance of clothing are the two main parameters related to clothing thermal comfort and protective ability. These two parameters, that all usually only measured for normal or cold atmospheric conditions, are measured here using a thermal manikin, one a commonly used and accurate method. This paper presents measurements of the thermal insulation and evaporative resistance of two-layer and three-layer protective clothing using the thermal manikin "NEWTON" in normal and hot environments. The tests show that, the parallel resistance method gives lower overall thermal resistances than the serial resistance method in hot environments. The tests also show that the thermal insulation resistances at high temperatures are 30%~38% lower than at normal conditions. The results also show that evaporative resistance of the two-layer clothing in the hot environment is less than for the warm condition and that the evaporative resistance of the three-layer clothing based on the mass loss method at high temperatures is less than in the normal environment, while the evaporative resistance based on the heat loss method in the hot environment is larger than that in the normal environment.
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| Keywords
thermal insulation
evaporative resistance
thermal manikin
protective clothing
hot environment
thermal radiation
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Issue Date: 15 March 2017
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2017,
Vol. 57
