Performance simulation of phase change walls with low exergy water

Combining the capillary with the phase change walls, studies the effects of physical parameters, supply and return water temperatures and double-layer phase change material arrangement on wall heat flux and temperature under winter and summer working conditions by using ANSYS Fluent software. The results show that the greater the difference between the phase change temperature and the average water supply temperature, the more energy storage, which is beneficial to the energy storage process. The greater the thermal conductivity of the phase change material, the faster the heat storage of the phase change material, and the greater the wall heat flux. The thermal conductivity has less effect on energy release. The greater the latent heat of phase change material, the more stable the wall temperature. For the single-layer capillary and double-layer phase change material, the thicker phase change material should be arranged on the side of the insulation layer, the thinner phase change material on the wall side, and the capillary in the thicker phase change material layer.