저에너지태양주택의 여름철 피크시간대 전력부하제로화를 위한 축냉이용운전

This paper describes an experimental demonstration of control method for reducing cooling energy demand during on-peak period by use of building thermal mass and buffer thermal storage for heat pump. The demonstration test was performed at a low-energy solar house demonstration house. The house employed high-insulation and high performance windows to reduce energy demand and renewable energy systems such as solar heating, solar PV, and ground-source heat pump. The control method is to change the setpoint temperatures for indoor space and heat pump prior to and during the on-peak period. The lower and higher setpoints were 24℃and 28℃ for indoor space cooling and 10℃ and 20℃ for heat pump by considering indoor comfort and availability for cooling of chilled water. Two test days in similar weather conditions were compared. Test results showed that cooling electric demand was zero during on-peak period and cooling energy consumptions for the whole test days were nearly same.