About Dust hot spots at the bottom of photovoltaic panels
The partial shading of the PV modules creates itself the well-known effect of hot spots (Moretón et al., 2015, Perez and Gorji, 2016). Moreover, the presence of dust covering partially or totally the glazing of the PV panel can cause overheating or cooling of the module according to their natures.
The partial shading of the PV modules creates itself the well-known effect of hot spots (Moretón et al., 2015, Perez and Gorji, 2016). Moreover, the presence of dust covering partially or totally the glazing of the PV panel can cause overheating or cooling of the module according to their natures.
Testing several dust types on the edge of the PV panel disclosed that dust, like “ash” and “soil”, causes a temperature rise of the panel compared to other dust types. They also experimentally measured losses from 10%–16% in power when dust accumulates on the bottom edging of the solar panel.
This study provides a comprehensive review of 278 articles focused on the impact of dust on PV panels’ performance along with other associated environmental factors, such as temperature, humidity, and wind speed.
The accumulation of dust and aggregation on the surfaces of the PV panels cause a haze of solar irradiation and acts as a shadow; leading to increase the temperature of the PV. The temperature, in turn, reduces the efficiency and performance of PV ( Kazem et al., 2017 ).
Abderrezek et al. studied the effect of dust on the electrical and thermal behavior of PV panels. They observed that hot spots can cause module overheating, depending on the nature and density of the dust .
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