without boiling. However, liquid cooling with boilingreduce more effectively the temperature of electroniccomponents compared to single-phase liquid cooling.Thermosyphon cooling is an alternative cooling technologyof dissipating high local heat fluxes. Thermosyphons can bedesigned either as a single tube or as a closed loop. Athermosyphon loop consists of an evaporator where heat isdissipated from the electronic components and a condenserwhere heat is rejected to the ambient. These twocomponents are connected by a riser and a downcomer