18 May 2017

P.2.3.1 A demonstration study of cooling system assisted with thermal energy storage system using phase change material

At the 21st COP (Conference of Parties), the agreement was made by representatives of 195 countries. It requires all participated countries have to active against the climate change. Before reached this agreement, Korea government had announced a plan to reduce the country’s greenhouse gas emission by 37 percent from the BAU (business-as-usual) level of 2030 year. Under this trend, the energy network technology has attracted to one of key research activities to meet above goals. KIER (Korea institute of energy research) headquarter is a suitable site for demonstrated research of the energy network technology because it has various heat facilities such as geothermal heat pump, solar collector, fuel cell and coal-fired power plant. For a demonstrated research, the lab-scale TESS (thermal energy storage system) was constructed in KIER. Its purpose is to reduce energy consumption by relieving time differences between thermal energy generation and consumption. To achieve its goal, TESS was constructed with an air to air heat pump and PCM (phase change material). Also an KIER EMS (energy management system) had accumulate measured data to provide information to decision-maker to optimal operate the system. As results of a preparatory experiment, TESS could shift the cooling loads and it might improve the primary energy efficiency by 33% compared to conventional absorption chiller system.