Influence of Dirt Accumulation and the Performance of PV Solar Panels
Shown in Table 1 is the output power of different loads and cases (layers of light obstruction) for light radiation of 310 W/msq : i.e the higher light intensity. It is shown that the electrical power output was reduced significantly (by up to 83%) when external resistances obscured the light path of the solar panel. The experiment was done by using a clean panel and a panel covered in talcum, dust, sand and moss. For light radiation of 310 W/msq
The output power of the solar panel was reduced by between 9% and 31% due to the effects of presence of talcum, between 60% and 70% due to dust, between 70% and 80% due to sand and between 77% and 83% due to moss. This implies that regular cleaning would be very important in order to ensure worthiness of adopting the readily known high-cost of solar PV technology.
This study shows that opaque particles tremendously affect the performance of solar PV, in particular moss, which could reduce the power by up to 83%. To overcome these problems, a proper maintenance operation for the solar panels would be necessary.
The International Conference on Technologies and Materials for Renewable Energy, Environment and Sustainability TMREES14
Science Direct Energy Procedia 50 (2014) 50 - 56