制冷背心用于隔绝式防护服中的传热模型研究

采用芯材为石蜡，壁材为密胺树脂，相变温度为35.66℃，相变潜热为158.7J/g的微胶囊相变材料制备制冷背心原理样衣，与隔绝式防护服配套使用，并委托中国人民解放军北京防化研究院生理评价试验中心对制冷背心进行生理评价试验。在室温36℃，相对湿度60%的条件下，测定穿着隔绝式防护服配有制冷背心前后的人体胸温、手温、腿温和肛温等参数随穿着时间的变化关系；结合人体产热，散热经验式与伍德科克人体散热理论建立模型，探讨人体穿着隔绝式防护服配有制冷背心前后人体平均体温随穿着时间的变化关系，并对如何提高人体着装舒适度和延长隔绝式防护服穿着生理时限进行综合分析。结果表明：穿着隔绝式防护服配有制冷背心前后，人体胸温、背温、手温、腿温和肛温明显下降；通过建模计算分析，穿着隔绝式防护服配有制冷背心前后的人体平均体温随穿着时间的变化关系计算值与实验测试结果吻合，变化趋势一致；在相同条件下，穿着配有制冷背心的隔绝式防护服过程中，人体体温较穿着未配有制冷背心的隔绝式防护服有所下降，上升幅度较小。

Heat Transfer Model of Cooling Vest Applied in Impermeable Chemical Protective Clothing

A cooling vest was prepared by micro-encapsulated phase change material with melamine resin as shell and paraffin as core. The phase change temperature and latent heat storage capability of microcapsules is 35.66℃ and 158.7J/g, respectively. The physiological evaluation was evaluated by the volunteer who wore the impermeable protective clothing with and without cooling vest inside to perform moderate exercises in the climatic chamber at the room temperature of 36℃ and the relative humidity of 60%. The temperature on the body chest, body back, hand, leg and rectal of volunteers wearing the protective clothing with and without cooling vest inside were tested in different wearing time. According to the empirical formula of heat production and dissipation in human body and Woodcock equation, the relationship between the average body temperature and time with and without cooling vest inside the impermeable chemical protective clothing was analyzed. The results showed that the temperature on the body chest, body back, hand, leg and rectal with cooling vest inside decreased clearly. After modeling calculation, the experimental and computer results were tallied well. The average body temperature with cooling vest inside the impermeable protective clothing decreased compared to without cooling vest inside.