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Building a wind turbine

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etwinning project

etwinning project

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    Building a wind turbine Building a wind turbine Presentation Transcript

    •  
    • First we took a PVC pipe. The pipe was about 1/5 as thick as it is long . We have 50 cm blades so the PVC pipe should have a diameter of 10 cm. One length of pvc pipe can make four blades.
      • We wanted to quarter the pipe. Drawing straight line and measuring on round surfaces is hard, so the best method is to get a large sheet of paper.
      • For each three of four quarters we did two things: 1) Cut out a rectangle from the base about 5 cms in, so we can easily attach it to whatever we want to. 2) Cut from the high tip of the base to the point.
    • Then we were all done. We had three blades ready to use.
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    • Here is another view of the hub with blades attached.
    • 30 volt motor was in good shape and worked great. Even just giving the shaft a quick turn with fingers would light a 12 volt bulb quite brightly. we gave it a real test by chucking it up in a drill press and connecting it to a dummy load. It works great as a generator, putting out easily a couple hundred Watts with this setup.
    • Next we needed a mounting for the turbine. Keeping it simple, we opted to just strap the motor to a piece of wood. The turbine snaps right around into the wind every time it changes direction. For a tail to keep it turned into the wind, we just used a piece of heavy sheet Aluminum.
    • Next we had to begin thinking about some sort of tower and some sort of bearing that would allow the head to freely turn into the wind . 1 inch diameter iron pipe is a good slip-fit inside 1 1/4 inch diameter. We could use a long piece of 1 1/4 inch conduit as our tower and 1 inch pipe fittings at either end. For the head unit we attached a 1 inch iron floor flange centered 7 1/2 inches back from the generator end of the 2X4, and screwed a 10 inch long iron pipe nipple into it.