热环境下液体冷却服(LCG)的性能评估

Performance Evaluation of Liquid Cooled Garments (LCG) in a Hot Environment

摘要: 为了缓解高温环境给人体造成的各种热不适，本文研制了一种以半导体制冷模块为核心的液体冷却服(LCG)系统，首先，构建了人体–LCG–环境之间的传热模型，基于传热模型搭建了LCG系统。其次，对无制冷措施和穿着LCG制冷时的人体皮肤温度和主观感受进行了对比实验。最后，根据LCG制冷时的出入水口温度，计算了LCG在不同环境温度下的制冷量实验研究及性能评估。实验结果表明，本文提出的LCG能够减缓人体在高温环境中的热不适，使得人体皮肤平均温度维持在热中性范围(32.1℃~33.6℃)内。

Abstract: In order to alleviate the various thermal discomforts caused by the high temperature environment to the human body, in this paper, a liquid cooling garment (LCG) system with semiconductor cooling technology as the core is developed. First, a heat transfer model between human body-LCG-environment is constructed, and the LCG system is built based on the heat transfer model. Secondly, the human skin temperature and subjective perceptions without cooling measures and when wearing LCG cooling were compared using human experiments. Finally, the experimental study and performance evaluation of the cooling capacity of LCG under different ambient temperatures were calculated based on the inlet and outlet temperatures of LCG cooling. The experimental results show that the LCG proposed in this paper can alleviate the thermal discomfort of human body in a high temperature environment and make the average human skin temperature maintain within the thermoneutral range (32.1˚C~33.6˚C).