WaterWorld, September 2011, ran an article entitled Floating Solar Systems Provide Power, Environmental Benefits. This article noted that “water facilities in several states are taking control of their energy costs by turning to solar photovoltaic (PV) power.”
As a water professional, I found one example presented in that article fascinating. Far Niente winery in Napa Valley, CA wanted to take advantage of solar power and a new technology which conserves valuable land space.
According to the article, SPG Solar, (www.spgsolar.com) has developed a floating solar technology named “Floatovoltaics® .“ This technology floats solar panels on water.
These floating panels both “conserves land space and provides water and environmental benefits while generating clean, renewable and affordable electricity.” According to the article, the solar panels are mounted on a racking system floating on pontoons and secured by a mooring system. For durability and longevity, the systems are engineered to keep all metallic components above water, leaving only closed HDPE plastic floats in contact with the water. The floats have been approved for use in drinking water reservoirs. The floating system is engineered to withstand 85 mph winds and change in water levels.
Noted in the article, this system benefits both the solar installation and the water reservoir. The panels are naturally cooled which results in improved power production. The cooler environment also reduces stress on the system, extending the system’s lifespan. The panels shade the water and reduces evaporation, a significant water loss in arid climates, up to 70%. A three acre storage pond covered with solar panels could save over 4 million gallons per year. This system also reduces algae growth minimizing associated treatment costs.
The system, which covers one square acre of water can generate 500,000 kWh of renewable energy. The winery offsets 100% of its electrical needs with this minimal maintenance floating solar system. This floating solar system is an example of how new renewable energy technology can be developed and implemented to solve both our energy crisis and be very environmentally beneficial as well.
H. Court Young
Author Understanding Water Rights and Conflicts
http://www.hcourtyoung.com
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