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Experimental Study of Moonlight Concentration of a Solar Tower Power Plant in the Full Moon Night

  • WANG Nan ,
  • WANG Xin-yu ,
  • SUN Fei-hu ,
  • GUO Ming-huan
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  • 1. Key Laboratory of Solar Thermal Energy and Photovoltaic System, Chinese Academy of Sciences, Beijing 100190, China;                  
    2. Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;                                             
    3. University of Chinese Academy of Sciences, Beijing 100049, China; 
    4. Joint Laboratory, Institute of Electrical Engineering, Chinese Academy of Sciences and Guangdong Five Star Solar Energy Co., Ltd, Beijing 100190, China;
    5. Taiyuan University of Technology, Taiyuan 030024, China

Received date: 2018-11-04

  Revised date: 2018-11-13

  Online published: 2019-02-27

Abstract

In the solar thermal tower power generation system, the measurement of concentrated flux distribution on the receiver aperture is of great significance for optimizing the solar thermal performance of the whole system. In this paper, an indirect measurement method was proposed based on moonlight concentration for the concentrated solar flux distribution of the heliostat field of a tower power plant. Two moonlight concentrating experiments carried out at Yanqing Solar Tower Power Plant in Beijing in the night of September 24, 2018, were introduced: one was to obtain the illuminance distribution of the concentrated lunar image taken by a CCD camera and calibrated through the illuminometers arranged on the tower; another was to obtain the illuminance distribution of the concentrated image by moving the image through the fixed illuminometers and then reconstructing the lunar image from the measured illuminance values at different times by Gaussian fitting. And then the relative illuminance distribution of the concentrated lunar image on the tower was obtained by comparing the illumination distribution with the direct normal illumination of the moonlight measured by the moonlight measuring station. The moonlight concentrating experiments showed that the relative flux distribution (ie, the concentration ratio distribution) of the concentrated lunar image of the tower power plant can be obtained, which provided experimental data support for the subsequent conversion to the solar flux distribution according to the brightness distribution relationship between the sun and the moon.

Cite this article

WANG Nan , WANG Xin-yu , SUN Fei-hu , GUO Ming-huan . Experimental Study of Moonlight Concentration of a Solar Tower Power Plant in the Full Moon Night[J]. Advances in New and Renewable Energy, 2019 , 7(1) : 23 -31 . DOI: 10.3969/j.issn.2095-560X.2019.01.003

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