KIEAE Journal

Korea Institute of Ecological Architecture and Environment (한국생태환경건축학회)
권호 표지

A New Approach to Design Method of the Solar Compound Parabolic Concentrator with Tubular Absorber

태양열집속집열기의 설계 방법에 관한 연구

  • Published : 2002.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

The intermediate range of temperatures($100{\sim}300^{\circ}C$) which can be achieved with CPCs(Compound Parabolic Concentrators) without tracking device provides both economic and thermal advantages for solar collector design. The present paper summarizes critical design considerations for CPC with cylindrical absorber and its optical performance using ray tracing program. Concentration ratios vary as acceptance half angle, ratio of reflector height to aperture width and ratio of reflector area to aperture area. This effects showed that the concentration ratio was increased as acceptance angle but optimum ratio of reflector height to aperture width existed at critical value. As a result of ray tracing, solar ray losses was maximized at acceptance half angle and this problem was solved by increasing absorber tube diameter. The concentrating flux distribution on the absorber surface was uniform but peak flux existed.

Keywords

Acknowledgement

Supported by : 과학기술부

References

  1. Keith A. Snail. Joseph J. O'gallagher and Roland Winston. 1983, A Stationary Evacuated Collector with Integrated Concentrator, Solar Energy. Vol. 33. No. 3 pp. 441-449
  2. A. Rabl. J. O'Gallagher and R. Winston, 1980, Design and Test of Non-Evacuated Solar Collectors with Compound Parabolic Concentrators. Solar Energy, Vol. 25, pp. 335 351
  3. P. C. Eames and B. Norton, 1993, Validated, Unified Model for Optics and Heat Transfer in Line-Axis Concentrating Solar Energy Collectors. Solar Energy, Vol. 50, No. 4, pp. 339-355
  4. W. T. Welford and R. Winston, 1989, High Collection Non imaging Optics, Academic Press, New York