论文部分内容阅读
目的研究舱外服的液温调节特性与换热量的对应关系,为液温调节阀的档位设计和自动温控设计提供依据。方法舱外服置于温度舱内,尽可能减小其与环境的热流;暖体假人着液冷服穿入舱外服内,模拟人体代谢产热;舱外服加压并控制余压40 kPa。开启风机和循环泵,保证通风和液冷循环并实现设备产热;净化装置采用模拟件;利用地面设备模拟改变水升华器出口水温和冷路流量。热平衡时计算系统换热量。结果液冷换热量随着冷路水流量的增大和水升华器出口水温降低而增大;通风换热量随着冷路水流量的增大而减小,随水升华器出口水温降低而增大。结论舱外服换热量与冷路流量为非线性变化关系;舱外服液温调节阀的分流特性应分段设计;在满足最大换热量的前提下,水升华器出口水温应控制在5~7℃。
Objective To study the corresponding relationship between the liquid temperature regulation and the heat exchange in the field service, and provide the basis for the gear design and automatic temperature control design of the liquid temperature control valve. Methods The outerwear was placed in a temperature chamber to minimize its heat flow with the environment. The warm-body dummy was dressed in the outerwear to simulate the heat metabolism in the body. The outerwear was pressurized to control the residual pressure 40 kPa. Open the fan and circulation pump to ensure ventilation and liquid cooling cycle and equipment to generate heat; purification device using simulation; use of ground equipment to simulate the change of water sublimation outlet water temperature and cold flow. Heat balance calculated when the heat exchange system. Results The liquid-cooling heat transfer increased with the increase of cold water flow and the decrease of water temperature at the outlet of water sublimation. The ventilation heat transfer decreased with the increase of cold water flow, Increase. Conclusions The heat exchange capacity and cold-flow rate of non-service outdoor unit are non-linear, and the shunt characteristics of the liquid temperature control valve should be designed in stages. Under the premise of maximum heat transfer, the outlet water temperature of water sublimation unit should be controlled at 5 ~ 7 ℃.