Double-Loop Thermosyphon for Electric Components Cooling

A double-loop thermosyphon for cooling electric components is presented. It consists of two loop thermosyphons in series, both driven by gravity. The evaporator of the first loop is in contact with the heating blocks providing the power. The condenser of the first loop thermosyphon comprises a heat exchanger plate, in close contact with a second heat exchanger plate serving as evaporator for the second loop. The heat is finally removed from the condenser of the second loop by forced convection. The motivation behind this double-loop thermosyphon consisting of two thermosyphons in series is increased layout flexibility. The thermal performance of the system is presented and compared with simulations based on a 1-D numerical model.