복합형 태양열 가열기의 일일 운전 특성 및 축열 성능에 관한 연구 = A Study on Thermal Storage Performance and Characteristics of Daily Operation of a Hybrid Solar Air-Water Heater

다국어 초록 (Multilingual Abstract)

In this study, a thermal storage performance and characteristics of daily operation were investigated when the air and the liquid were heated simultaneously by a hybrid solar air-water heater that can make hot water as well as heated air. The hybrid solar air-water heater is kind of a flat plate solar collector that can make hot water and heated air by installing air channel beneath absorber plate of traditional flat plate solar collector for hot water. As a result of daily operation, maximum water temperature reached in a thermal storage was shown $44^{\circ}C$ on 73kg/h of air mass flow rate and about $40^{\circ}C$ on 176kg/h of air mass flow rate. Thus, the necessity of heating water in thermal storage by operating only liquid side was confirmed when the temperature of liquid in thermal storage is lower than we need. In case of efficiency investigated on daily operation, the thermal efficiency of the liquid side was decreased with increment of the inlet liquid temperature and decrement of the solar radiation, but efficiency of the air side was increased with increment of inlet liquid temperature difference as the traditional solar air heater. Total thermal efficiency of the collector was shown from 65.85% to 78.23% and it was decreased with increment of the inlet liquid temperature and decrement of solar radiation same as the traditional system.

참고문헌 (Reference)

1 최휘웅, "복합형 태양열 가열기에서 열매체 단일운전에 따른 기기성능 평가" 한국태양에너지학회 34 (34): 49-56, 2014

2 최광환, "복합형 태양열 가열기 열매체 동시운전시의 열적 성능에 관한 실험적 연구" 한국태양에너지학회 34 (34): 115-121, 2014

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5 Alireza Mohajer, "Experimental investigation of a Hybrid Solar Drier and Water Heater System" 76 : 935-944, 2013

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7 Fatkhur Rokhman, "An Experimental Study on the Characteristic of the Hot Water-Air Heating Generating System with a Solar Collector" 360-363, 2012