Thermosyphon is chosen to deal the problem. A two-phase closed thermosyphon (TPCT) is essentially a gravity-assisted wickless heat pipe, which utilizes the heat of evaporation and condensation as a working fluid. The TPCT uses gravity to return liquid to condensate. Since the evaporator of a TPCT is located in the lowest position, the gravitational force will support the capillary force’s duty.