부하패턴을 고려한 보조열원 내장형 급탕용 태양열 시스템 축열조의 설계 방법

The objective of this study is to develop a design process to determine the size of solar DHW storage with immersed auxiliary heater. Solar DHW storage with immersed auxiliary heater should be designed to supply hot water which is required in building and to store solar energy produced solar collector. In this paper, design process consists of four steps. At first, hot water load pattern in building is analyzed. Secondly, by considering hot water load pattern and solar fraction of solar energy systems, hot water production rate of the immersed coil is determined. Thirdly, hot water tank size is determined by comparing the surplus stored hot water and the excess domestic hot water. Lastly, solar thermal storage volume is determined. TRNSYS simulations were carried out to guarantee the ability to supply hot enough water of the storage designed by the suggested design process.