Dynamic charging characteristics modeling of heat storage device with heat pipe

The dynamic characteristics of heat storage device with heat pipe during charging process are studied. According to the energy balance of heat storage device, the dynamic charging process model of heat storage device with heat pipe is presented. Paraffin is taken as phase change material (PCM) and water is used as heat transfer fluid (HTF). R134a is taken as working medium of heat pipe. The temperature of PCM, heat storage capacity and heat storage rate are simulated. The effects of inlet temperature of heat pipe medium and initial temperature of the PCM on the thickness and temperature of the PCM, outlet temperature of heat pipe medium, total heat storage capacity and heat storage rate of heat storage device are discussed. The results indicate that total heat storage capacity and heat storage rate increase when the inlet temperature of heat pipe medium increases or the initial temperature of heat storage material decreases.

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► The charging characteristics of heat storage device with heat pipe are studied.
► The effects of heat pipe medium and PCM temperatures are analyzed.
► The outlet temperature of medium varies little during latent heat phase of the PCM.
► The heat storage capacity increases with the inlet temperature of heat pipe medium.
► The heat storage rate is constant during latent heat storage process of the PCM.