2 GJ급 열에너지 저장 시스템의 축열 및 방열 특성

The increasing demand and the environmental impacts of fossil fuel consumption calls for increasing efforts to reduce greenhouse gas emissions, improve energy efficiency, and manage energy demand. Recently, the focus has been placed on technologies that effectively use unutilized energy in the industrial setor. Thermal Energy Storage (TES) is a key technology in the development of storage and distribution of waste heat, and a heat delivery technology using a mobile- TES system has been proposed. In this study, we constructed a 2 GJ-scale TES module based on latent heat storage using a Phase Change Material (PCM) and investigated its heat charging and discharging characteristics. Docosanol-organic fatty alcohol-was selected as a heat storage medium, and steam and water were used as heat transfer fluids. The test results showed that approximately 2 GJ of heat could be stored at a charging rate of 190 kW. After the heat charging process, hot water can be produced at 43oC with a flow rate of 0.6 m3/hr, and the discharging heat is equivalent to 1.9 GJ with a thermal efficiency of 92%.