태양열을 이용한 온수 및 난방 일체형 복합시스템에 관한 연구

Abstract

Meanwhile the dynamic models of hot water boilers of residential house are small and simple, most of the systems are designed to heated up water at a coil type heat exchanger passing through the length of fire way in the boiler. However, the heating of the water in this study is conducted at a storage tank by heat exchangers which conveys heat from solar collector and boiler to the tank that is directly inserted to the thermal storage tank. In this study, a simulation program was developed with heat transfer model in the storage tank and analysis was conducted with variation of operating condition and schedule of operation to analyze performance of the a hot water supply and panel heating system with a solar collector and burner combined thermal storage tank. The simulation program is divided two sections. One part is calculation of temperature variation of water which flows through the panel in the floor for heating of the residential house during 24 hours, and the other part is heat transfer calculation for the reaction time to get desired water temperature in the thermal storage tank. For the analysis, solar radiation was varies with climate condition as three kinds of weather such as fair, clear and cloudy based on Korean Standard. As results, light oil consumption and system performance during operation period were analyzed with variation of climate condition and with or without solar collector. It was founded that the effect of collector on the system performance was good in all considered cases. Most of the case, oil could be saved about from 24 to 41% with installing the solar collector. The performance of the system is more dependent on radiation time of the solar the collector rather than the intensity of the solar radiation.