液冷服冷源优化及性能参数研究

Study on cold source optimization and performance parameters of liquid-cooled cloth

为延长液冷服的有效使用时间,提出一种使用高吸水性树脂(SAP)作为冷源的液冷服。在高温气候室中进行测试,探究液冷服对受试者皮肤温度及主观评价的影响。使用数值模拟探究环境温度、流量和人体代谢率对冷却服性能的影响,以及最佳工况组合。结果表明:SAP能够延长液冷服的有效使用时间,与冰袋相比增长了37.5%,改善了受试者的主观评价;当环境温度和劳动强度增加时,改变进口温度比降低流速对皮肤温度有着更好的改善;在中度劳动下,20℃的进口温度与500 mL/min流量为最佳组合。

In order to prolong the effective use time of a liquid-cooled cloth, using super absorbent resin(SAP) as a cold source was proposed.The effects of liquid-cooled cloth on skin temperature and subjective evaluation were investigated in a high-temperature climate chamber. The effects of ambient temperature, flow rate and human metabolic rate on the performance of cooling cloth and the optimal combination of working conditions were investigated by numerical simulation. The results show that SAP can prolong the effective use time of liquid-cooled cloth by 37.5% compared with ice bag, and improve the subjective evaluation of subjects, the skin temperature can be improved by changing the inlet temperature rather than decreasing the flow rate, and the optimal combination of the inlet temperature of 20 ℃ and the flow rate of 500 ml/min is obtained under moderate labor.