| 内容提要: |
With the development of the miniaturization and the high integration of electronic chip, the thermal management of the high power electronic becomes a major challenge. In this paper the influence of heat sink temperature on operational characteristics was comprehensively conducted and the 35% of charging ratio was selected through the experiment study. To evaluate the LHP system, temperatures, start-up time, thermal resistance, and evaporator heat transfer coefficient were selected as performance indicators. The result showed that, there existed an optimal heat sink temperature (18oC) to obtain the lowest evaporator bottom temperature (77oC), the shortest start-up time (1000s), the smallest thermal resistance (0.29k/W), and the highest evaporator heat transfer coefficient (3.1 104 W/(m2·k)). The temperature range to keep a high performance of LHP system was 14-20oC. The conclusion obtained through the experiment can provide the reference of design the cooling system when the LHP system applied into the electric cooling. |