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Collect more solar energy and waste heat for process water heating

By Mary Page Bailey |

A new technology developed by Enertopia Corp. (Kelowna, B.C., Canada; www.enertopia.com) aims to improve the efficiency of solar panels by collecting excess waste heat and using it to heat water. Besides improving energy output, the technology also significantly lengthens the useful lifespan of solar panels by reducing overheating. Enertopia’s technology involves outfitting the backside of a solar panel with a sponge-like heat-dissipative device made of ethylene propylene diene monomer (EPDM). “Basically, there’s water flowing underneath the solar panels, which removes the excess heat, but in order to couple the panel to the EPDM rubber device and not shock the panel or break the glass, we have developed a breakthrough technology that actually acts like a one-way heat sink on the back of the panel,” explains Mark Snyder, lead process technologies consultant for Enertopia. In some conditions, says Snyder, the EPDM device can take advantage of dewpoint differences and draw water out of the atmosphere, meaning that it can actually create water in addition to collecting waste heat. “If you have a large array, you could actually be making several thousands of gallons of water per day,” he adds. On either side of an array of…
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