무기계 상변화 물질을 이용한 온수 축열 및 방열 성능 평가 연구

Although many domestic industrial and incineration facilities utilize waste heat generated during processing, they only use waste heat and do not utilize waste heat of relatively low quality. In this study, we intended to develop a technology to store and supply waste heat by using latent heat and latent heat of inorganic PCM(Phase Change Material) as a means of utilizing low-quality waste heat generated by industrial processes. A PCM thermal storage device was built, and the heat storage and releasement performance were evaluated through repeated experiments. A manufactured PCM heat storage device used water as a heat transfer medium. The water was heated to an average temperature of 96.8℃ and supplied to the PCM heat storage system. The average heat storage amount of the PCM heat storage device during heat storage operation was 321.5 MJ, and 321.5 MJ of heat stored in the PCM heat storage device was discharged through water and air. It was able to heat to 283.4 MJ when heated through water and 300.7 MJ when heated through air. The overall efficiency of the entire system, calculated as the amount of heat releasement compared to the amount of heat stored, was 88.2% using water and 93.5% using air.