Study On Temperature Distribution Of Protective Clothing System Ontaining Pcms In Cold Environment

This paper was aimed to study the temperature distribution regularity of each layer and different areas of the protective clothing system containing PCMs during the thermal protective process. Based on the experimental results, several optimized design schemes were put forward. In order to research the contents, objective experiments were conducted on a thermal manikin using the temperature recorder and the infrared thermal imager to test the temperatures of the micro climate layer and the outermost layer of the protective clothing containing PCMs.(1) Study on temperature distributions of interlayer in clothing system. Objective experiments were conducted on a thermal manikin in a climate chamber using the temperature recorder with 8 probes to test the left chest temperatures of the micro climate layer and the outermost layer of the protective clothing containing PCMs. The experiments were conducted under three temperature conditions of 2℃, 5℃ and 8℃. Three kinds of PCMs with different dosage and two kinds of PCMs with different phase-transition temperature were selected in the test. The temperature distribution regularities of the micro climate layer, the outermost layer, and the temperature difference between the micro climate layer and the outermost layer of different PCM protective clothing under the influence of the PCMs with different dosage and phase-transition temperature were researched. And the correlation between the protective time of the micro climate layer and the equilibrium temperature of the outermost layer was analyzed.(2) Study on temperature distributions of different areas in clothing system. Objective experiments were conducted on a thermal manikin in a climate chamber using the temperature recorder with 8 probes to test temperatures of the micro climate layer and the outermost layer in different areas of the protective clothing containing PCMs. The experiments were conducted under three temperature conditions of 2℃, 5℃ and 8℃.Three kinds of PCMs with different dosage and two kinds of PCMs with different phase-transition temperature were selected in the test. The differences of temperature distribution regularities of the micro climate layer, the outermost layer between different areas of the PCM protective clothing under the influence of the PCMs with different dosage and phase-transition temperature were researched.(3) Study on temperature distributions of the outermost layer in clothing system. Objective experiments were conducted on a thermal manikin in a climate chamber using the infrared thermal imager to test temperatures of the outermost layer in the whole areas of the protective clothing PCMs. The experiments were conducted under three temperature conditions of 2℃, 5℃ and 8℃. Three kinds of PCMs with different dosage and two kinds of PCMs with different phase-transition temperature were selected in the test. The whole outmost layer was divided into different areas so that the temperature differences between different areas were analyzed. The temperatures of different areas were ranked. And the temperature differences between different areas under the influence of the PCMs with different dosage and phase-transition temperature were researched.(4) Optimized design schemes were put forward for the protective clothing system containing PCMs. Based on the experimental results, combination schemes of PCMs with different dosage for different areas or combination of PCMs with different phase-transition for different areas in the same clothing system were proposed which could improve the entire protective effect with less PCMs consumption.