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Environmental Effects on the Optimal Performance of Photovoltaic Power Systems

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This paper investigates the effect of the different climatic parameters such as accumulated dust, high temperature, humidity, and solar radiation on the PV system performance. This study is carried out using 20 kW roof-top photovoltaic (PV) system located in Cairo city (capital of Egypt). The practical results are recorded for two years (2017-2018). The experiments and the processes of collecting data have been performed according to a normal cleaning scheduled scheme. The essential contribution of this research is the usage of the collected practical data for developing an empirical formula used for detecting the energy loss due to dust accumulation, high temperature, humidity, and cleaning pattern. Therefore, the proposed formula can be used for detecting the energy produced from any solar power plant in this area according to the used cleaning pattern. The validity of the proposed model is investigated by comparing the output energy from the proposed model with the real measured data at different operating conditions during the period of study.
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Environmental Conditions; PV Efficiency; PV Mathematical Model; PV Modules; Photovoltaic System Performance

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