This study investigates the effect of soiling on the performance of a solar photovoltaic (PV) panel at controllable indoor conditions. The investigation took a dynamic study approach into the I-V characteristics curve at the National Energy Research Center (NERC), Soba, Khartoum state, Sudan. The soiling used dust samples collected from the premises of NERC. The experiments were conducted using some of the prepared dust samples' particles distributed on a monocrystalline silicon solar PV panel with a constant power light source. At different dust layers the solar PV was characterized by computing the resulting power generated of the PV panel. It has been found that the accumulation of the dust on the surface of the solar photovoltaic panel, 14.6 µm and 43.9 µm thicknesses, can reduce the panel's generated power by 17.1% and 67.6%, respectively. In addition, a full blockage of the solar photovoltaic panel's characteristics has been reported at 109.8 µm thickness of the dust layer.
This paper presents an experimental study of deposited dust particles effect on the electrical performance of solar photovoltaic (PV) panels. Due to limited conventional resources (fossil fuels) renewable energy turns to be the best alternative as a source of clean energy. Enhancing the efficiency of PV panels has been presenting a significant part of the clean energy technology developments. Accumulation of dust on solar PV panels is a natural process. External resistance caused by light obstruction material, due to dust, reduces solar photovoltaic performance. Studies show that accumulated dust can reduce solar panel systems efficiency, however, the percentages depend totally on the environment conditions of the system site. Therefore, outdoor experiments were conducted, using two silicon mono-crystalline panels (washed before each measurement and unwashed panel) exposed to natural sun light for three months at the national energy research center (NERC), Soba, Khartoum state, Sudan. The results show that dust deposition reduces the efficiency of the solar PV panels in a range from 4.3% to 16.8%.
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