The heat storage rate of phase change components for a building envelope is low

because the thermal conductivity is low and the surface heat transfer is not sufficient for the phase change materials. In order to increase the rate of heat storage

the phase change component is placed under mechanical ventilation to test the regenerative rate of phase change component under different supply air temperature and air velocity conditions in the experimental platform for researching thermal performance of phase change component. Finite difference method is also used to calculate the thermal storage process of phase change component by Matlab software to expand the experimental air supply temperature conditions. It also calculates the energy consumption of the system considering the energy consumption of the fan

and an effective ventilation method is proposed. The results show that changing the supply air temperature or air velocity greater impacts on the heat storage rate of liquefaction process

but fewer impacts on the heat storage rate of regenerative process. Improving the supply air temperature or air velocity can shorten the phase change completion time

it also can improve heat flux of the component's surface. When the air velocity was 1.0 m·s-1

and the supply air temperature increased from 34℃ to 80℃

the average heat flux of liquefaction process increased from 23 W to 322 W. The percentage of heat storage in liquefaction process decreases with the increase of air temperature

and can be constant with the increase of air velocity. In case of the phase change component is combined with mechanical air supply

it should be considered in heat storage of the system and power consumption of the fan. In the same air velocity conditions

the time of achieving maximum energy savings ultimate steady. When the supply air temperature is 80℃

the air velocity is 2.0 m·s-1

the time is 1.6 h

the system can achieve maximum energy savings for 891.8 kJ.