Phase change materials absorb or release heat during phase changing

but its own temperature keep constant. Thus

a box-type energy storage device was developed to regulate the internal temperature of the vehicle and saving energy. Since the suitable environment temperature of human body is 22-26℃ and the phase change temperature of paraffin is 25℃

paraffin is chosen as phase change energy storage material. In this experiment

the melting process and solidification process of paraffin packed in aluminum bottles had been explored. The air velocity of outlet was set at 2.5 m/s. When the air temperature of inlet was 35℃

the paraffin could absorb heat in the melting process and reduce the ambient temperature by 3℃ for 3 hours. When the air temperature of inlet was 10℃

the heat could be released in the solidification process and the ambient temperature was increased by 3℃ above for 3.5 hours. Meanwhile

the temperature change regularity of the graphite composite in the melting and solidification process is explored. Under the condition of constant air velocity

the rate of melting and solidification of graphite composite is related to the temperature difference between phase change material and ambient air. The greater the temperature difference

the faster the phase transition speed and the shorter the phase transition time.