Abstract: 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.