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Heat Transfer Research
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Heat Transfer Research

DOI: 10.1615/HeatTransRes.2014007043
pages 429-446

PROPOSAL OF THE SHAPE LAYOUT OF TRAPEZOIDAL CAVITY RECEIVER TO IMPROVE THE OPTICAL EFFICIENCY

Fuqiang Wang
Harbin Institute of Technology at Weihai, Harbin Institute of Technology, 2 West Wenhua Road, Weihai 264209, P.R. China
Yong Shuai
Key Laboratory of Aerospace Thermophysics of MIIT, School of Energy Science of Engineering, Harbin Institute of Technology, Harbin 150001, China
Heping Tan
Key Laboratory of Aerospace Thermophysics of MIIT, School of Energy Science of Engineering, Harbin Institute of Technology, Harbin 150001, China
Liang Gong
Department of Energy and Power Engineering, China University of Petroleum (East China), 66 West Changjiang Rd. Huangdao District, Qingdao 266580, PR. China

ABSTRACT

The optical efficiency of conventional trapezoidal cavity receiver with different aperture radii is analyzed by the Monte Carlo ray tracing (MCRT) method. During fabrication, the bottom surface of the conventional cavity receiver cannot be fully covered by a coiled copper tube which would induce a dead space of solar energy absorption. A proposal for a shape layout of the trapezoidal cavity receiver, i.e., an inverted trapezoidal receiver with a bottom surface interior convex (ITBSIC receiver) is put forward with the objective of solving the problem of dead space absorption and improving the optical efficiency of the conventional trapezoidal cavity receiver. The effects of the interior convex dimensionless height, wall absorptivity, alignment error, and the pointing error on variation of the optical efficiency are analyzed.


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