Compact Thermosyphon Using Refrigerant Flow Control. (Improvement of Heat Transfer Characteristics in the Cooling Unit with Multiple Power Modules Vertically Mounted)

Abstract

In a compact closed two-phase loop thermosyphon which consists of a multiradiator and a refrigerant bath with multiple power modules mounted vertically, the heat radiation performance deteriorates as the refrigerant bath becomes thinner. We have found that this is because the return condensate is blocked by the back flow of the bubble in the return path when the heat load decreases and increases sharply. We have also improved the heat radiation performance by providing an adiabatic path between the boiling area and the return path.