공기-물 히트펌프와 결합된 PCM 축열조의 연간 급탕 에너지 성능에 관한 연구

다국어 초록 (Multilingual Abstract)

Domestic hot water and space heating are occupying more than 65% of carbon dioxide emissions from residential sector, highlighting the critical need to reduce carbon dioxide emissions from these sources. Heat pumps are promising products that can cover the domestic hot water load with higher efficiency than conventional boiler and electric heater system. In addition, phase change materials (PCMs) have received attention as thermal energy storage because of its high thermal energy density and isothermal characteristics during charging and discharging. In this study, heat pumps integrated with water and PCM thermal energy storages were analyzed to address domestic hot water demands of residential apartment. The system annual energy performance was analyzed using TRNSYS with domestic hot water demand profile of apartment in Gyeonggi-do. As a result, the energy consumption of the water thermal energy storage integrated with heat pump was 28.4% of that of the boiler system. The PCM thermal energy storage integrated with heat pump can reduce storage volume by 65% compared to water storage, while maintaining same energy consumption as water storage integrated with heat pump.