Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
권호 표지

Thermal Performance Variations of Glass Evacuated Tube Solar Collectors Depending on the Absorber Shape and the Incidence Angle of Solar Ray

흡수관 형상과 일사 각도에 따른 진공관형 태양열 집열기의 성능 변화

  • Kim Yong (Department of Mechanical Engineering, Graduate School, Inha University) ;
  • Seo Tae-Beom (Department of Mechanical Engineering, Inha University) ;
  • Kang Yong-Heack (Korea Institute of Energy Research)
  • 김용 (인하대학교 대학인 기계공학과) ;
  • 서태범 (인하대학교 기계공학과) ;
  • 강용혁 (한국에너지기술 연구원)
  • Published : 2005.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

The thermal performances of glass evacuated tube solar collectors are numerically investigated. Four different shapes of solar collectors are considered and the performances of these solar collectors are numerically investigated. Dealing with only collecting tube, the effects of not only the shape of the absorber tube but also the incidence angle of solar irradiation on the thermal performance of the collector are studied because the energy obtained by the absorber can be varied according to the incidence angle of solar radiation. However, the solar irradiation consists of the beam radiation as well as the diffuse radiation. Also, in actual system, the interference of solar irradiation and heat transfer interaction between the tubes should be considered. Therefore, this study considered these effects is carried out experimentally and numerically. The accuracy of the numerical model is verified by experiments. The result shows that the thermal performance of the absorber used a plate fin and U-tube is about $25\%$ better than those of the other models.

Keywords

References

  1. Harding, G. L., Zhiqiang, Y. and Mackey, D. W., 1985, Heat extraction efficiency of a concentric glass tubular evacuated collector, Solar Energy, Vol. 35, No.1, pp.71-79 https://doi.org/10.1016/0038-092X(85)90038-6
  2. Perez, R., Seals, R., Anderson, J. and Menicucci, D., 1995, Calculating solar radiation received by tubular collectors, Journal of Solar Energy Engineering, Vol. 117, pp.341-344 https://doi.org/10.1115/1.2847893
  3. Zinian, H., Hongchusan, G., Fulin, J. and Wei, L., 1997, A comparison of optical performance between evacuated collector tubes with flat and semicylindric absorbers, Solar Energy, Vol. 60, No.2, pp.109-117 https://doi.org/10.1016/S0038-092X(96)00160-0
  4. Lin, Q. and Furbo, S., 1998, Solar heating systems with evacuated tubular solar collector, EuroSun 98, III.2.27-1-7
  5. Shah, L.J. and Furbo, S., 2004, Vertical evacuated tubular-collectors utilizing solar radiation from all directions, Applied Energy, Vol. 78, Issue 4, pp. 371 -395 https://doi.org/10.1016/j.apenergy.2003.10.004
  6. Kim, Y, Seo, T., Kang, Y and Yim, C., 2004, Numerical analysis on the thermal performance of the glass evacuated tube solar collector adopting a finned tube, National Solar Energy Conference
  7. Pyrko, J, 1984, A model of the average solar radiation for the tubular collector, Solar Energy, Vol. 32, Issue 4, pp.563-565 https://doi.org/10.1016/0038-092X(84)90273-1
  8. Perez, R, Seals, R, Anderson, J. and Meincucci, D., 1995, Calculating solar radiation received by tubular solar energy collectors, Solar Engineering, Vol. 1, ASME, pp.699-704
  9. Zhiqiang, Y, Harding, G. L. and Window, B., 1984, Water-in-glass manifold for heat extraction from evacuated solar collector tubes, Solar Energy, Vol. 32, No.2, pp.223-230 https://doi.org/10.1016/S0038-092X(84)80039-0
  10. Zhiqiang, Y, Harding, G. L., Craigand, S. and Collins, R E., 1985, Comparative study of fluid-in-metal manifolds for heat extraction form single ended evacuated glass tubular collectors, Solar Energy, Vol. 35, No.1, pp. 81-91 https://doi.org/10.1016/0038-092X(85)90039-8
  11. Duffie, J. A and Beckman, W. A, 1991, Solar Engineering of Thermal Process, 2nd ed., Wiley Interscience, New York
  12. Jo, D. K., Kang, Y. H. and Auh, C. M., 2003, A study on the analysis of solar radiation characteristics on a high elevated area, Journal of the Korea Solar Energy Society, Vol. 23, No.3, pp.23-28