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Analysis on the Effect of Thermal Performance with Various Load Patterns for Solar Hot Water Heating System  

Kim, Byoung-Gi (Department of Mechanical Engineering, Gyeongsang National University)
Jang, Hwan-Young (Department of Mechanical Engineering, Gyeongsang National University)
Chung, Kyung-Taek (2nd BK21(AMAEEP), Gyeongsang National University)
Suh, Jeong-Se (School of Mechanical and Aerospace Engineering, ReCAPT, Gyeongsang National University)
Publication Information
International Journal of Air-Conditioning and Refrigeration / v.15, no.3, 2007 , pp. 108-113 More about this Journal
Abstract
The performance of a solar water heater incorporating evacuated tubes was evaluated using a transient simulation program, TRNSYS. Simulations were performed for $60^{\circ}C$ of hot water load temperature and for 280 liter of daily hot water volumes and three 400 liter of storage tank volumes. Three patterns of daily hot water consumption profile were used in the present study (morning, lunch and evening). The results show that the increase in solar fraction depends on the load profile, as well as the collector efficiency coefficient. Hot water draw profile has a large effect on the performance of the SDHWS, the morning load profile has the highest solar fraction. The annual solar fraction of the system, at the weather conditions of Jinju is approximately 84% at lunch load pattern, the 280 kg of load volume, 400 kg of tank volume and the $60^{\circ}C$ of load temperature.
Keywords
Water heating system; TRNSYS; Solar fraction; Consumption profile; Collector efficiency; Load pattern;
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