Investigation of copper-water loop heat pipe for different filling ratios

Abstract

The present work reported here involves the experimental investigation and performance evaluation of loop heat pipe (LHP) with flat evaporator and wick made up of stainless-steel mesh. The experiment is conducted for different fill ratio such as 40%, 50%, 60% and different heat loads of 20 W, 40 W, 60 W, 80 W and 100 W using De-Ionized water as fluid for electronic cooling applications. And evaluated operating performance of loop heat pipes for both steady and transient state. The evaporator, condenser, liquid line and vapour line are made up of copper and are placed in horizontal orientation. The results show Under forced water-cooling condition with the cooling water temperature of 25 °C, the LHP can transfer a maximum heat load of 100 W with the evaporator temperature of 92°C and a minimum thermal resistance of 0.5332 °C/W.