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Shining more light on solar panels

Improving low concentration photovoltaics

Date:
October 22, 2015
Source:
Michigan Technological University
Summary:
A better understanding of how light reflects off different surfaces has improved action movies, videogames and now solar panels. Researchers have found a way to get more sun to shine on the panels and crank up the output by 30 percent or more.
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Thermal radiation readings on panels help Joshua Pearce and his research team better understand ways to improve low-concentration photovoltaic systems.
Credit: Joshua Pearce, Michigan Tech

Solar panels are the beacon of renewable energy, yet they are not getting as much light as they could be. Joshua Pearce from Michigan Technological University and a team from Queen's University in Canada have found a way to get more sun to shine on the panels and crank up the output by 30 percent or more.

"We expend a lot of blood, sweat and tears to make solar panels as efficient as possible," Pearce says. "We work so hard to get a fraction of a percent increase on the module level; double digit returns on the systems level was relatively easy."

Such a large increase of efficiency at the system level then could greatly change how solar panels are installed, and with the economic payback, it could even mean major retrofits for existing solar farms.

"We're looking at this from a systems perspective," Pearce says, who is an associate professor of materials science and engineering and electrical and computing engineering. He explains that the research focused on the system rather than individual panels mostly because the current set up for ground-mounted solar panel arrays is "wasting space."

The iconic flat-faced solar panels installed in large-scale utility solar farms are spaced apart to prevent shading. As the sun shines on a photovoltaic system, sending electricity into the grid, a fair amount of that potential energy is lost as the light hits the ground between rows of panels. The solution is simple, says Pearce: Fill the space with a reflector to bounce sunlight back onto the panels and use the light-reflecting mathematical models of videogames and action movies to avoid temperature swings.


Story Source:

Materials provided by Michigan Technological University. Note: Content may be edited for style and length.


Journal Reference:

  1. Rob W. Andrews, Andrew Pollard, Joshua M. Pearce. Photovoltaic System Performance Enhancement With Nontracking Planar Concentrators: Experimental Results and Bidirectional Reflectance Function (BDRF)-Based Modeling. IEEE Journal of Photovoltaics, 2015; 5 (6): 1626 DOI: 10.1109/JPHOTOV.2015.2478064

Cite This Page:

Michigan Technological University. "Shining more light on solar panels: Improving low concentration photovoltaics." ScienceDaily. ScienceDaily, 22 October 2015. <www.sciencedaily.com/releases/2015/10/151022141718.htm>.
Michigan Technological University. (2015, October 22). Shining more light on solar panels: Improving low concentration photovoltaics. ScienceDaily. Retrieved May 8, 2017 from www.sciencedaily.com/releases/2015/10/151022141718.htm
Michigan Technological University. "Shining more light on solar panels: Improving low concentration photovoltaics." ScienceDaily. www.sciencedaily.com/releases/2015/10/151022141718.htm (accessed May 8, 2017).