Numerical Analysis on Heat Transfer Characteristics of a Heat Pipe Type Solar Thermal Receiver Depending on End Wall Angle Variation

고온 히트파이프식 태양열 흡수기의 후벽 각도 변화에 따른 열전달 특성의 수치해석

  • Park, Young-Hark (Dept. of Aerospace & Mechanical Engineering, Graduate School, Korea Aerospace University) ;
  • Jung, Eui-Guk (Dept. of Aerospace & Mechanical Engineering, Graduate School, Korea Aerospace University) ;
  • Boo, Joon-Hong (School of Aerospace & Mechanical Engineering, Korea Aerospace University) ;
  • Kang, Yong-Heack (New and Renewable Energy Research Division, Korea Institute of Energy Research)
  • 박영학 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 정의국 (한국항공대학교 대학원 항공우주 및 기계공학과) ;
  • 부준홍 (한국항공대학교 항공우주 및 기계공학부) ;
  • 강용혁 (한국에너지기술연구원 신재생에너지 연구본부)
  • Published : 2008.11.14

Abstract

The heat transfer characteristics of a solar high-temperature receiver with heat pipes was investigated by numerical simulation. The concentration ratio of the solar receiver ranges 1000 and the concentrated heat is required to be transported to a certain distance for specific applications. This study deals with internal geometry variation of a solar receiver incorporating high-temperature heat pipe. The isothermal characteristics in the receiver section is of major concern. The diameter of the solar thermal receiver was 120 mm and the length was 400 mm. The angle of receiver end wall was varied between $0^{\circ}$ and $45^{\circ}$. The wall thickness of the heat pipe channel was 4mm and 48 axial channels of the same dimensions were attached to the outer wall of the receiver with even spacing in the circumferential direction. The channels are changed to high-temperature sodium heat pipes. Commercial softwares were employed to deal with the radiative heat transfer inside the receiver cavity and the conduction heat transfer along the channels. The numerical results are compared and analyzed from the view Point of high-temperature solar receiver.

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