히트 파이프 형상이 열전달 성능에 미치는 영향

Abstract

In this study, the effect of the shape of the heat pipe on heat transfer performance was evaluated using experimental and simulation approaches. The volume fraction of the working fluid was set to 10-30% in the annular heat pipe, and the amount of heat rate of 10-30 W was applied until the temperature reached a steady state. The experimental results show similar temperature distribution at the points not in contact with the heat source regardless of the volume fraction. The overall temperature distribution also increases as the amount of heat input increases. This study reveals that the heat pipe could obtain high performance by appropriately combining the volume fraction of working fluid and heat input. Based on these experimental data, heat transfer performance was investigated with two different heat pipes models. The heat transfer performance of a heat pipe can be affected by vapor flow, evaporation, and condensation. The steam is easier to flow in the annular heat pipe that shows better heat transfer performance than a square column type heat pipe.