本文阐述了一种机械泵驱动两相回路的储液器的控温原理，并对待选的两种控温策略进行了解释：一种是基于电压的PI控制，另一种是基于功率的PI控制。文中将它们作了近似等效转换，并用SINDA／FLuINT软件进行模拟。结果显示：当控温点上升时，两种不同控制策略的控温效果大体一致；但当控温点下降时，由于基于功率的PI控制策略包含有Peltier的制冷功能，可以比基于电压的PI控制策略更快到达控温点。另外，基于功率的PI控制策略在死区内的跳跃更少，其应当为优先选择的控制策略。“,”The temperature control principle on the accumulator of a mechanical pumped two-phase loop has been presented in this paper, and two scenarios have been discussed： one is PI control based on the voltage, and the other is PI control base on the power. Approximate equivalent conversion between the two scenarios has been realized, and simulation has been conducted by using SINDA/FLUINT. The results show that, both the two scenarios have almost the same performance when the set-point is rising; but the accumulator can be much faster to reach the set-point with PI control based on the power when the set-point is decreasing, because it has cooling effect from the peltier. Besides, the skips in the dead-band for the PI control based on the power are less than those of the PI control based on the voltage. PI control based on the power should be the priority scenario to choose.