Cavity receiver thermal performance analysis based on total heat loss coefficient and efficiency factor |
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| Authors: | Qiangqiang Zhang Xin Li Zhifeng Wang Zhi Li Hong Liu Jun Li |
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| Affiliation: | Key Laboratory of Solar Thermal Energy and Photovoltaic Systems of the Chinese Academy of Sciences, Beijing Engineering Research Center of Solar Thermal Power, Institute of Electrical Engineering, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Beijing, China |
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| Abstract: | A cavity structure effectively decreases the heat loss of a receiver. This paper applies the widely used collector analysis method to derive the total heat loss coefficient and efficiency factor for a cavity receiver. Based on the derived factors, this paper investigates the effect of different parameters, such as absorber surface temperature and emissivity, on thermal performance. The absorber surface emissivity significantly affects the total heat loss coefficient at high temperatures. The effect of the absorber surface temperature on the total heat loss coefficient is significant, while the effect of the ambient temperature on the total heat loss coefficient can be ignored. The present results can help to determine the testing conditions for the cavity receiver by using molten salt as the heat transfer fluid. |
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| Keywords: | cavity receiver efficiency factor molten salt total heat loss coefficient |
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