Experimental Analysis of Dual-Evaporators Hybrid Two-Phase Cooling Loop

A mechanical pump-assisted and capillary-driven (hybrid) two-phase cooling loop, with dual-evaporators in the same loop placed in parallel and series, was constructed to experimentally investigate the performance of the multi-evaporators cooling loop. This paper discusses various heat input experiments using the dual-evaporators loop that were tested up to 1200 Watts, or 600 Watts (102 W/cm²) for each evaporator. Difficulties and limitations experienced with both parallel and series tests are discussed. It is found from the tests that the total heat inputs in the system determine the system temperatures and pressures and the individual heat input to each evaporator determines the evaporator temperatures. Setting up the evaporators in parallel allows for more cooling than series.