MEASURING ENERGY EFFICIENCY FROM A 4 kW DISH CONCENTRATOR SYSTEM USING OLDER PARABOLIC ANTENNA TECHNOLOGY
A fiberglass parabolic dish with a diameter of 2.44 m and focal length of 0.92 m, used for telecommunication in decades past, has been converted into a parabolic solar concentrator. In previous work a solar tracking system was developed and a vinyl-aluminum film was applied to the receiver to make it reflective. Current studies began with the analysis of the optical properties of the vinyl-aluminum film after three years of exposure to the elements; subsequently a new film was tested and applied. A receptor, serving as a heat exchanger, was constructed from carbon steel in order to measure the energy efficiency and net energy gain of the system. A cost analysis is reported for the entire system. The average net energy gain for the 4.68 m2 receiver was 2.18 kJ when normal direct irradiance averaged 950 W/ m2. With thermal efficiency measured to be 48％, capable of reaching 53％, a Stirling engine is proposed to generate electricity.
Rafael E.Cabanillas L Joseph Kopp
Universidad de Sonora Rosales y Luis Encinas, Col.Centro Hermosillo, Sonora, 83000 México University of Nevada, Las Vegas Graduate College
国际会议
2007世界太阳能大会(Proceedings of ISES Solar World Congress 2007)
北京
英文
2007-09-18（万方平台首次上网日期，不代表论文的发表时间）