Development of wind-driven water pumping system for supplemental irrigation in Pililla, Rizal, Philippines
2015
Ang, R.C.A.
With the continuous threat on fuel shortage, wind energy is harnessed to prime agricultural activities. While numerous type of windmills are already available in the market, there is a growing interest and need of wind energy extraction systems with other blade shapes and structural configurations. This paper aims to develop a wind-driven water pump for supplemental irrigation. Relevant design criteria such as functionality and simplicity in construction and operation are considered in the design phase. The wind-driven water pump is a combination of Savonius wind turbine and centrigugal pump. Performance of the wind turbine was tested on a wind turbine and centrifugal pump. Performance of the wind turbine was tested on a wind tunnel using a scale model. Characteristics such as torque, shaft speed and power coefficient are measured under 15%, 20% and 25% overlap ratio and test wind speeds of 2.62 m/s, 3.25 m/s, and 3.86 m/s. The 20% overlap ratio yields the best wind turbine performance in all wind speeds. Its performance is used to predict the performance is used to predict the performance of full-scale wind turbine which is 4.88 times the size of the scale model. The predicted values are simulated on a pump test rig using torque/speed control mechanism. Pump performance is tested under variation in torque and shaft speed as a function of wind speed. An average is tested under variation in torque and shaft speed as a function of wind speed. An average flow rate of 10 gpm was obtained under 5.79 m/s wind speed. The cost of pumped water is estimated at Php 2.60 per cubic meter
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