Doing this research It designs, builds and compare the wind turbine with 4 blades and five rotor diameter of 1.25 meters, the rotor is made of PVC (PVC), a material that is readily available locally and reduce the cost of generating wind turbines for selection. use a custom installation on buildings or on high. Chanthaburi province in wind speed at different levels. The test work and picking up speed. (M / s), speed. (RPM), voltage (V) and current (mA) of wind turbines at wind speeds in the range 16.00 - 17.00. For a period of one month and a break of wind turbines, each with
comparable values. of wind turbines four propellers and propeller 5 can be seen that wind turbines are four rotor voltage average = 16.90 V and the current average = 226 mA, which is more wind turbines are propeller 5 with voltage average 16.32. V and current = 216 mA in average wind speed as well. The efficiency of wind turbines with 4 rotors are 0.093 more wind turbines are propeller 5 is 0.083, or more than 10.75 percent as well, and also the breakeven point faster than the wind turbine type 5 Propellers approximately one year, so the windmills of four blades, ideal for. Installation in Chanthaburi province and provide high performance. Reduce the cost of generating wind turbines, due readily available local materials. And can also be stored in a battery charger for a 12 V power supply used to benefit longer term importance: the performance of wind turbines, wind turbines, the breakeven point.
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