Browse > Article

A Study on Energy Distributions Produced by Dish Solar Concentrating System  

현성택 (한국에너지기술연구원)
강용혁 (한국에너지기술연구)
천원기 (제주대학교 에너지공학과)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.14, no.11, 2002 , pp. 907-913 More about this Journal
Abstract
An experimental study on energy density distributions produced by dish solar concentrating system was performed to optimally design and rightly position a cavity receiver. This deemed also very useful to find and correct various errors associated with a concentrator. It is observed that the actual focal length is 2.17 m with a maximum energy density of 1.89 MW/$m^2$. By evaluating the position of flux centroid, it was found that there are errors within 2 cm from the target center. As a result of the percent power within radius, approximately 90% of the incident radiation is intercepted by about 0.06 m radius. The area concentration ratio normalized to 800 W/$m^2$ insolation and 90% mirror reflectivity was 347 suns. The total integrated power of 2467 W was measured under focal flux distributions, which corresponds to the intercept rate of 85.8%.
Keywords
Flux distribution; Dish solar concentrating system; Reflector; Absorber;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Jones, S. A. and Neal, D. R., 1996, VSHOT: A Tool for Characterizing Large, Imprecise Reflectors. SNL Report SAND96-2272C
2 Kang, Y. H. and Kack, H. Y, 1999, Development of Solar Thermal Concentrating System With Paraboloidal Dish, Report of Korea Institute of Energy Research, KIER-994601
3 Feuermann, D., Gordon, J. M. and Ries, H., 1999, High-Flux Solar Concentration with Imaging Designs, Solar Energy, Vol. 65, No. 2, pp. 83-89
4 Neumann, A. and Schmitz, A., 1999, The SCATMES Device for Measurement of Concentrated Solar Radiation, ASME J. Solar Energy Engineering, Vol. 121, pp. 116-120
5 Schubnell, M., Keller, J. and Imhof, A., 1991, Flux Density Distribution in the Focal Region of a Solar Concentrator System, ASME J. Solar Energy Engineering, Vol. 113, pp. 112-116   DOI
6 Johnston, G., 1998, Focal Region Measurements of the 20m$^2$ Tiled Dish AT the Australian National University, Solar Energy, Vol. 63, No. 2, pp. 117-124
7 Johnston, G., 1995, Flux Mapping the 400m$^2$ 'Big Dish' at the Australian National University, ASME J. Solar Energy Engineering, Vol. 117, pp. 290-293   DOI