다채널 평판형 써모사이폰의 열성능에 미치는 응축부 경사각 및 길이의 영향에 관한 연구

Abstract

Heat pipes with simple structure, miniaturization, low production cost and high thermal performance are used in various fields. However, when the heat pipe is used, there is a problem that it does not operate in the horizontal state or the performance becomes low. Therefore, in this paper it is created a mechanism that allows the working fluids to easily return to the evaporation section by inclining only the condensation section, which is part of the heat pipe that emit heat. In addition, it is tried to confirm the thermal performance characteristics of the heat pipe according to the length of the condensation section. The performance characteristics were confirmed experimentally. The experiment was conducted on input power of 5W and 15W based on the battery temperature of the electric vehicle in order to utilize it for heat dissipation of the battery of the electric vehicle. In addition, in order to expand the range of use, we conducted additional experiments with input power of 5 to 25W. As a result, in the 5W and 15W conditions, according to the inclination angle of the condensation section or the length of the condensation section, the performance was up to 2.3 times higher than when the flat type thermosyphon was horizontally operated. It can be seen that the effective thermal conductivity increases up to 2.4 times under the input power condition of 5W to 25W. As a result of the experiment, the thermal performance of 20% charging ratio shows higher thermal performance than the thermal performance of 40% charging ratio. Compared to the case of, It shows the best thermal performance at of inclination of the condensation section. The effective thermal conductivity when the length of the condensation section is long is approximately 2.4 times larger than the effective thermal conductivity when the length of the condensation section is short.