Optimization design of surface microstructure of high-efficiency space radiation heat dissipation fins

Abstract

With the continuous progress of deep space exploration, the need to develop high-power spacecraft has become urgent. The mass and volume of high-powered spacecraft radiators account for a large percentage. Therefore, an efficient and lightweight space radiation cooling system is one of the key research directions that need to be developed in the future. In the present study, from the perspective of strengthening the radiant heat flow rate unit mass (Φ/m), the improvement idea of adding “triangular rib”, “arc rib” and “wave rib” types of surface microstructure on the traditional plate radiation fins is proposed. The heat conduction and the radiation process were simulated by COMSOL Multiphysics®. The effects of parameters, such as microstructure thickness, top angle, heat source spacing and environment temperature on index Φ/m were analyzed. The optimal parameter arrangement of the surface microstructure was obtained, and the mechanism was revealed from the view of thermal conductivity and radiation heat dissipation.