Due to the increasing energy costs and concern on carbon footprint, renewable energy technologies have become more important. Especially after the COP21 Paris meeting, increase in implementation of renewable energy systems has been an important agenda item of countries globally. Among these renewable technologies, solar energy is one of the key players. Hence research on photovoltaic (PV) panels has become more important.
This study investigates the heat transfer effect of water droplets on the panel surface. As surface temperature variation plays a significant role in the efficiency of the solar panel, understanding the heat transfer phenomena between the droplet and the panel is crucial. Temperature variation around the droplet-panel interface was studied both theoretically and numerically. Different cases were studied considering droplet volume, number of droplets, and the distance between the droplets. This research concludes that droplet retention on PV panel surface after a rain, condensation or irrigation event is observed when the drag force dominates the body forces. Amount of heat transfer increases with increasing droplet volume and contact area. Hence more heat transfer is observed over hydrophilic surfaces then hydrophobic surfaces. As the number of droplets over the PV panel surface increase, cell temperature decreases which would yield panel efficiency. It was observed that as the distance between the droplets increases, cooling effect lessens. This decrease in the cooling effect would get higher as the droplets get further away from each other.
|Commitee:||Shavezipur, Kamram, Yan, Terry|
|School:||Southern Illinois University at Edwardsville|
|School Location:||United States -- Illinois|
|Source:||MAI 58/02M(E), Masters Abstracts International|
|Subjects:||Engineering, Mechanical engineering|
|Keywords:||ANSYS simulation of heat transfer, Heat transfer between two boodies, Retention of the droplets on an inclined plane, Solution of the energy conduction equation, Temperature distribution by numerical and theoretically method, Volume of the droplet|
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