한국태양에너지학회 논문집 (Journal of the Korean Solar Energy Society)

  • 제25권1호
  • /
  • Pages.19-25
  • /
  • 2005
  • /
  • 1598-6411(pISSN)
  • /
  • 2508-3562(eISSN)
한국태양에너지학회 (The Korean Solar Energy Society)
권호 표지

이중 진공관형 태양열 집열기의 집열관 내부 형상과 운전 조건이 성능 변화에 미치는 영향

Effects of Absorber Tube Shape and Operating Conditions on Thermal Performance of All-Glass Evacuated Tube Solar Collectors

  • 최은용 (인하대학교 대학원 기계공학과) ;
  • 김용 (인하대학교 대학원 기계공학과) ;
  • 서태범 (인하대학교 기계공학과)
  • Choi, Eun-Young (Dept. of Mechanical Eng., Graduate School, Inha University) ;
  • Kim, Yong (Dept. of Mechanical Eng., Graduate School, Inha University) ;
  • Seo, Tae-Beom (Dept. of Mechanical Eng., Inha University)
  • 발행 : 2005.03.30
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초록

All-glass evacuated tube solar collectors consist of glass evacuated tubes and absorber tubes. Solar thermal energy from the sun is transferred to the working fluid through the glass evacuated tube and the absorber tube. Several collectors which have different absorber tubes are tested to find the effects of the absorber tube shapes and the operating conditions such as the incident heat flux and the flow rate. As the results, the efficiency of the collector which has a finned tube U tube is about $2{\sim}5%$ higher than that of the others in all cases on an average. And the collector has a finned U tube has the highest efficiency at the high flow rate and the low incident heat flux. In this condition, the outlet mean temperature is low and the heat loss becomes small. Also, it is known that the fin effect is greater than the shade effect.

키워드

참고문헌

  1. Journal of Solar Energy Engineering v.117 Calculating solar radiation received by tubular collectors Perez, R.;Seals, R.;Anderson, J.;Menicucci, D.
  2. Journal of the Korean Solar Energy Society v.24 Thermal Performance Compairsons of Glass Evacuated Solar Collectors Using Different Absorbing Tubes Kim, Yong;Seo, Tae-Beom;Kang, Yong-Hyuk
  3. Solar Energy v.64 Determination of Emittance of Sellective Absorbing Surface Yuzong, Gui;Zuqing, Xue;Xiaowen, Zhou;Zhiqiang, Yin
  4. Solar Engineering of Thermal Processes Duffie, John A.;Beckman, William A.
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  6. John A Duffie, William A Beckman, Solar Engineering of Thermal Processes Second Eidition, 1991
  7. D. Yogi Goswami, Frank Kreith, Janf. Kreider, Principles of Solar Engineering Second Edition, 1999