30 Sep '13, 4pm

This Sunflower irrigates fields with sunshine

This Sunflower irrigates fields with sunshine

In areas with abundant sunshine during the growing season, as well as accessible groundwater, this low-cost solar water pump could be a great alternative to diesel pumps for irrigating fields and enabling more predictable yields for small farmers. The Sunflower pump, from Futurepump, uses a solar collector and a steam boiler to drive a water pump capable of a potential daily output of over 10,000 liters from a well with a 10 meter water depth, and is simple to use and easy to maintain. © Futurepump "The solar collector concentrates sunlight onto the water-filled boiler, producing steam which is piped to the engine. A cam attached to the flywheel shaft opens an inlet valve. Steam enters the cylinder and the pressure pushes the diaphragm piston forward activating the water pump and rotating the flywheel. The inlet valve closes, the exhaust valve opens and as the pressure dro...

Full article: http://www.treehugger.com/solar-technology/sunflower-irri...

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