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A Characteristic Analysis on the Thermal Performance of the Dish Type Solar Concentrating System  

Kang, Myeong-Cheol (Advanced Solar Thermal Research Center, Korea Institute of Energy Research)
Kang, Yong-Heack (Advanced Solar Thermal Research Center, Korea Institute of Energy Research)
Yoon, Hwan-Ki (Advanced Solar Thermal Research Center, Korea Institute of Energy Research)
Yoo, Seong-Yeon (Department of Mechanical Design Engineering, Chungnam National University)
Publication Information
Journal of the Korean Solar Energy Society / v.26, no.1, 2006 , pp. 7-12 More about this Journal
Abstract
The dish type solar thermal concentrating system can collect the solar energy above $800^{\circ}C$. It has a concentration ratio of 800 and total reflector area of $49m^2$. To operate solar receivers at high temperature, the optimum aperture size is obtained from a comparison between maximizing absorbed energy and minimizing thermal losses. The system efficiency is defined as the absorbed energy by working fluid in receiver divided by the energy coming from the concentrator. We find that system efficiency is stable in case of flow rate of above 6lpm. The system efficiency are 64.9% and 65.7% in flow rate of 6lpm and 8lpm, respectively. The thermal performance showed that the maximum efficiency and the factor of thermal loss in flow rate of 8lpm are 68% and 0.0508.
Keywords
Solar thermal Concentrating system; Thermal Performance; solar absorber/receiver;
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