Design and Numerical Analysis of Air-cooled Heat Dissipation Structure Based on PCM

• 1、Department of Mechanical Engineering, Zhejiang University City College, Hangzhou 310015

Abstract：In this paper, based on the actual working conditions of a small air-cooled engine, a surface cooling structure based on phase change material was designed. The device was arranged in a circular structure on the surface of the engine, and the phase change material is filled inside, and the metal fins are wrapped outside to strengthen the heat transfer. Through the enthalpy model, the numerical model of the phase change heat transfer process was established, and the influence of the parameters, such as different phase change materials, thickness and curvature, and the starting temperature and the temperature of the engine water on the phase change heat transfer process were analyzed and compared. It is found that the phase change paraffin is an ideal material, and the thickness has a significant influence on the phase change heat transfer process, and the influence of the curvature can be ignored. In addition, the lower starting temperature and the highest temperature of engine have adverse effects on the heat transfer effect of phase change.

Keywords： Engineering thermal physics Enhanced heat transfer Phase change material Cooling device Numerical analysis