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Does Solar Water Pumping Work in New York? More than a dozen solar water-pumping systems have been installed in upstate New York since 2001 by Four Winds Renewable Energy. With funding from the NYS Department of Agriculture and Markets, two systems were installed at the Alfred State College Tech Farm in order to test the long-term performance of solar water pumps used in seasonal grazing. The systems are a submersible pump placed in a 225 ft. well (90 ft. static water level) in a heifer pasture and a floating pump placed on a developed spring in a pasture used for grazing beef cattle. On clear days, the pumping rate was consistently 1.8-1.9 gpm, the maximum that the pump is rated for, over the course of the day (excluding sunrise and sunset). This was measured between 9 AM and 5 PM on summer days, with lower rates during the dawn and dusk hours. On partly cloudy days, the midday pumping rate was 0.9 to 1.3 gpm when clouds obscured the sun. During severe cloud cover, such as rainy days, the pump would not operate (but is not needed). The highest values (1000- 1120 gpd) were seen during clear summer days. In 2002, Four Winds Renewable Energy installed seven more systems in Steuben, Tioga and Tompkins County. More installations are scheduled through the “Solar-Powered Livestock Watering Project” sponsored by the Finger Lakes RC&D and funded by NYSERDA. All nine existing systems are doing well, meeting or exceeding projected daily water production. Conclusions Solar water pumps can provide simple and low labor watering options for farms that require water in remote areas. Several general points to keep in mind about solar water pumping include: 14 Figure 12. PV powered booster pump assembly in a mobile unit.PDF Image | GUIDE TO SOLAR- POWERED WATER PUMPING SYSTEMS IN NEW YORK STATE
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