The research of analytical solution of hollow brick and porous media transient heat transfer

According to the structure of hollow brick and porous media, heat conduction mechanism can be analyzed in two-dimensional space. Using the physical coupling model of natural convection and heat conduction, heat transfer equation of hollow brick and porous media transient heat transfer can be got, the control equation adopts the finite volume method. Analytical solution of heat exchanger models can be deduced under constant heat flux and wall temperature boundary condition. Heat transfer law can be studied under the change of external environment. And the inner and outer temperature changing and delay characteristics can be obtained. By researching in temperature change, we can get that energy-saving effect of hollow and porous media brick is remarkable.