Design and Performance Verification of Pump-driven Two-phase Cooling System

To solve the heat dissipation problem of high heat flux devices in electronic equipment, the pumpdriven two-phase cooling technology, which is based on the principle of medium phase transformation, is adopted. In this paper the pump-driven two-phase cooling system is built and the key components are designed. The heat dissipation performance of the system and the influence of heat load change on multi-branch flow distribution are analyzed. The results show that the 312 W/cm² local heat flux of the pump-driven two-phase cooling system with R134a as working medium can be achieved, the temperatures near the joint surfaces of different heat sources and cold plate are uniform, and the temperature difference is less than 1 ℃ for multipoint heat sources (heat flux of 0.4 ~5.5 W/cm² ), the heat load changes of a branch can cause the flow distribution changes of each branch for multi-branch system.