Study on night heating design of solar thermal storage system in winter based on CFD

Abstract

Abstract With the gradual maturity of solar heating system, more and more houses are equipped with solar heating equipment for heating. In view of the heating effect of the movable plate house, this paper selects the coldest monthly average temperature of -15 °C in Jinan as the external condition, designs the wall embedded heating coil with water as the medium, and uses CFD simulation software to establish the geometric model of the temperature distribution of the house in 7 hours after 10 pm. The simulation results show that when the overall wall is covered with heating coil, the nighttime temperature of the indoor personnel rest area is above 7 °C without considering the heat transfer effect between the personnel themselves and the internal space of the house. If the wall is covered with heating coil, the indoor average temperature will be no less than 12 °C. Solar energy contribution rate can reach more than 43.15 %, energy saving effect is obvious.