Experimental analysis of two loops system for high heat flux microelectronics cooling

As electronics advance and require higher power densities, the demand for efficient cooling methods increases. Due to high heat flux capability, two-phase cooling systems may be applied to cool a wide variety of newly emergent technologies such as power electronics seen in electric-drive vehicles. In this work, the experimental results of the cooling performance of a pump-assisted and capillary-driven two-phase loop, which utilizes a unique planar evaporator are discussed. Water was used as the working fluid. The evaporator was fed liquid by both mechanical and capillary pumping, while the vapor and liquid phases in the evaporator are separated by capillary force to prevent it from flooding. The experimental results of the two phase loop system with a single evaporator handling a single heat source shows the proper boiling condition under a stepwise heat load with sudden power variation. The effects of various operation variables of the two-phase cooling loop, such as dynamic and stepwise heat input, liquid flow rate, high heat flux, on the cooling performance of the two-phase loop are discussed.