采用并联蒸发器作为传热元件,并联冷凝器作为散热部件,建立了包括热量收集、传递与排散的机械泵驱动两相回路集成试验系统,并对该系统的热启动进行实验研究。实验结果表明:(1)在冷工况、低热流密度的情况下,采用长程毛细管结构的蒸发器对分布式小热源进行集热时,会出现阶段性形核沸腾蒸发,并且上游过热液体形核沸腾后会导致下游出现干烧现象。(2)对于该系统,并联蒸发器相同热量同时启动是相对较好的启动方式。 The parallel evaporator was used as the heat transfer element and the parallel condenser was used as the heat-dissipating component. The integrated test system of mechanical pump-driven two-phase circuit including heat collection, transfer and discharge was established. The experimental study was carried out on the hot start of the system. The experimental results show that: (1) In the condition of cold condition and low heat flux, the nucleate boiling evaporation occurs when the distributed small heat source is heated by the evaporator with long-distance capillary structure, and the superheated liquid form After the nuclear boiling will lead to the downstream dry phenomenon. (2) For this system, it is relatively good to start with the same heat in parallel evaporator.