并联蒸发器环路热管实验研究

采用并联蒸发器环路热管作为传热元件,并联冷却管辐射器作为散热部件,建立了包括热量收集、传递与排散的环路热管(LHP)集成试验系统,并进行了实验研究。实验结果表明:在并联蒸发器LHP系统中,蒸发器按顺序先后启动是其稳定的启动方式;在LHP运行过程中,当LHP工作在可变热导模式下,只有一个液体补偿器中保持汽液两相状态,并控制着LHP的运行温度,另一个液体补偿器则被充满液体,且处于过冷状态;在总热负荷不变的情况下,随着热负荷在蒸发器之间的分配不同,LHP的运行温度改变。当LHP工作在固定热导模式下,LHP的运行温度只与总热负荷有关,而与热负荷的分配情况无关。

Testing of Loop Heat Pipe with Dual-Evaporator

In order to investigate the performances of an loop heat pipe(LHP) with multi-(evaporator),an integrated experimental system including dual-evaporator loop heat pipe,parallel-flow condenser and equipment panel was established,which could accumulate,transfer and radiate heat.An extensive testing program was conducted on a loop heat pipe with two evaporators.The tests(results) showed that the loop could be always started successfully if the loop started up in(sequence),which was the most dependable start-up model.After multi-evaporator loop started up,only one Compensation Chamber contained two-phase fluid and control the loop operating(temperature) under the variable conductance mode.The heat loads distribution was a function of the loop(operating) temperature.However,under constant conductance mode,all Compensation Chambers were liquid filled and the heat loads distribution between evaporators had hardly any effect on the loop operating temperature.