The world’s first power plant combining hydroelectric and solar power is now operational in Portugal. The Alto Rabagão dam has been outfitted with 840 floating solar panels, which increase the plant’s total capacity of 68 MWh by 220 kWp. Within its first year, the station should generate 332 megawatt hours, enough to power 100 homes for a year.
The panels were created by Ciel & Terre International (C&T), developers of the floating solar system Hydrelio. The system is designed to allow ecologically friendly floating photovoltaic (FPV) panels made out of recyclables to be installed on large bodies of water rather than eating up valuable space on land.
Additionally, the panels partially shield the water, which helps to slow evaporation and the growth of algae. The panels also reduce waves within the reservoir, cutting down on the erosion of its banks.
The main goal behind C&T’s FPV panels is to generate energy while maximizing the use of an artificial body of water. Installing the panels on dams makes plants more profitable and produces more energy. The panels collect sunlight during daylight hours, and hydropower can be used during peak demand times and after dark.
C&T estimates that if only 10 percent of the world’s 50 largest dams were outfitted with FPV panels, 400 gigawatts (GW) of solar electricity could be produced.
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