Experimental Study on the Heat Storage/Release Characteristics of a Thermoelectric Heat Pump Phase-Change Thermal Storage Device

This paper made experimental study on the heat storage / release characteristics of a new-type thermoelectric heat pump phase-change thermal storage device which can achieve active heat storage/release, by altering the operating parameter such as heat medium flow, heat medium temperature difference, input current. The results show that: when the working voltage and the exhaust heat source temperature are high, the time that the device need to store heat is short. The heating coefficient of the device can be influenced by over high working voltage. Compared to passive heat storage / release phase-change thermal storage devices, the device improved the mismatch of thermal energy supply and demand sides on time, place and intensity in the process of low-temperature waste heat recovery. It overcame disadvantages that passive thermal energy conversion device existed. The device can timely adjust heat storage rate according to the time and intensity of heat emission, actively recycle and use low temperature waste heat.