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JOURNAL OF DESERT RESEARCH ›› 2016, Vol. 36 ›› Issue (4): 932-942.DOI: 10.7522/j.issn.1000-694X.2016.00042

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The Effect of Dustfall on the Power Output of Photovoltaic Plants Located in Major Cities in Northearn China

Sun Jiahuan1,3, Wang Tao1, Xue Xian1, Cui Yongqin2, Xiao Jianhua1   

  1. 1. Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. Division of Hydrology and Water-Land Resources in Cold and Arid Regions, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    3. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2016-03-14 Revised:2016-03-31 Online:2016-07-20 Published:2016-07-20

Abstract: In 2010-2015, photovoltaic (PV) plants were booming in China. Dustfall on PV modules may decrease the transmittance of its glass and cause a significant decrease of power output. Quantization of the power output losses by dustfall is basic to predict the power output. Based on irradiation, temperature losses, dustfall and other data, this paper model the annual power output of PV plants of 36 cities (annual precipitaion <800mm) in Northern China, where the dustfall is higher than southern China. The results show: (1)The mean annual power output of the 36 cities is 209.62±30.15 kWh·5m-2, with the maximal and minimal power outputs in Lhasa and Xi'an, respectively; (2) The dustfall almost have no effect on the optimal tilt angles; (3) The maximal power output losses by dustfall (5.32%) is obtained in regions where the annual precipitation is 100-200 mm, and the minimal power output losses by dustfall (2.09%) is obtained in regions where the annual precipitation is 600-800 mm.

Key words: photovoltaic plants, power output, optimal tilt angles, dustfall

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