Optimal design of the solar heating system with porous heat-storage wall

In this paper, an optimal solar heating system with porous heat-storage solar wall is designed. The heating energy available coefficient and the heating temperature efficiency proposed in this paper are regarded as two indicators to assess the effect of air distribution on the usage of solar energy. The effect of ventilation mode on the heat transfer and flow characteristics of the heating system are calculated, analyzed and compared by using the energy two-equation model and Brinkman-Forchheimer Extended Darcy model for saturated porous medium, and the standard k-Ε turbulent flow model. Results show that the ventilation mode of the solar heating system with porous heat-storage solar wall has a big influence on the temperature field, the flow field in the heating room, and it directly affects the insulation effect of the system and the heat utilization of the porous solar wall. The ventilation pattern of upper-side inlet and upper-side outlet is conducive to raising the utilization of the porous wall.