Abstract
In this study, the effect of Non-Condensable Gas (NCG) in Oscillating Heat Pipe (OHP) was evaluated by using Closed Loop OHP (CLOHP) made of copper capillary tube. The working fluid was ethanol and the NCG was argon. Temperature and pressure were measured over the heat input range from 40 W to 180 W. The temperature amplitude, the thermal resistance, the pressure amplitude and frequency were calculated. From the results, the NCG affects the thermal performance of OHP.