Fresnel lens, succession of concentric rings, each consisting of an element of a simple lens, assembled in proper relationship on a flat surface to provide a short focal length. The Fresnel lens is used particularly in lighthouses and searchlights to concentrate the light into a relatively narrow beam. Its the reason that fresnel lenses have a great advantages to enhance the efficiency of panels in solar energy. But due to high capital cost its difficult to arrange, but if it possible then you can achieve the maximum efficiency from solar panels or plates.

First, any concentrator system relies on steering, and the higher the level of concentration the better the steering must be. But don't equate focussing with efficiency. Efficiency is determined primarily by the PV technology. and concentrator PV has to be cooled to remove the excess thermal energy absorbed by the cell.

Hi! Maybe this 2 article can help you: Article The Use of Fresnel Lenses to Improve the Efficiency of Photo...

Article Design analysis of a Fresnel lens concentrating PV cell

There is a big feasibiliy when use concentrating PV solar technology by fresnel lens especially with high efficiency solar cell like tandom solar cell which its effeciency reach more than 30% , and U can harvest electrical and thermal energy at the same time for different applications.

Any energy concentration system requires a sun-tracking system. This dramatically increases the cost of the system as a whole. For the same funds, you can increase the area of the panels and get a bigger win.

U can increase the benifet from using fresnel concentrating lens by using high concentrating ratio lens.

Dear gentlemen, thank you for an interesting and inspiring discussion.

Vladimir Kubov .

For panels, the accuracy requirements for a tracking system are not high, often several degrees. Such tracking systems do not dramatically increase the cost of the station. The possible areas of single panels have technical limitations. Even wind effect must be considered. The determination of panel area, the presence of a tracking system, station efficiency and other optimization tasks should be considered together as one an integral system. Typically, large stations have tracking systems. In short, everything is not so simple here, we have a complex problem.

Rasul Akbarov Tracking systems with energy concentrators are used only for very expensive, multi-layer elements with a small work surface. For conventional panels with an efficiency of 13-17%, the use of a tracking system is not economically justified.