Wave Wind Power with Piezo at electric boat

Discussion in 'Boat Design' started by mtumut, Sep 3, 2009.

  1. mtumut
    Joined: Mar 2005
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    Location: ISTANBUL

    mtumut Junior Member

    I think piezo electric films could be used at producing your electric motor energy from wind and waves at sea. Only you have to do is to cover the entire ocean going one meter boat with this film. I heard you can buy cheap , may be from china.
    I got this idea from a high school project which wins the water use competition. It was about producing electric from rain at moonsoon.
    It is good project from a Turkish girl took it from 1800 competitors.
    My mission is to go to visit my Chilean friends. It is windy , cold way , no sun. I dont think my homemade electric generator withstand against south atlantic waves :)

    Thanks ,

    Mustafa Umut Sarac

    Istanbul
     
  2. portacruise
    Joined: Jun 2009
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    portacruise Senior Member

    Maybe possible, but yield is low and engineering maybe complex.
    http://powerelectronics.com/news/wind-piezoelectric-generator/

    It is also possible to use piezo crystals to construct electric motors. I have parts from a small piezo fan motor made for computer fan cooling applications many years ago. It used ac current to flex a crystal which made a pair of flexible fan blades move back and forth, much like a fish tail. There were claims that it was more efficient because it did not use electromagnets (zero wiring loss). The fish tail design might be adapted to work in water. Here is a company that has various product lines:http://www.piezomotor.se/?menu=products&page=legs1

    Porta

     
  3. BertKu
    Joined: May 2009
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Hi Porta, you are right, have a look at the attached article.
    BertKu
     

    Attached Files:

  4. tspeer
    Joined: Feb 2002
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    Location: Port Gamble, Washington, USA

    tspeer Senior Member

    If only it were that simple. You need to look at the response of piezo film and compare it to the frequency of the waves. I think you'll find the piezo film reacts very well to high-frequency input, but very poorly to the wave frequencies, especially for a 1m boat. A small boat is going to move with the waves, and so there will be less difference in pressure from the waves acting on the surface.

    For a boat that size, you would probably do better to have a heavy mass inside that would provide power as it acted on its restraints. The springs that center the mass could be tuned so the mass will resonate at the frequency of the waves from which you wish to extract the energy, and the mass could drive the boat through mechanical means as it moved back and forth.

    As pointed out above, hydrofoils are a better way to extract energy from the waves. But sail power is still probably your best bet, especially since wind and waves tend to come together.
     
  5. BertKu
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Is there somebody, who would be willing to make a small drawing and explain how the mechanical method works in a boat like this? Any guess?

    BertKu
     
  6. portacruise
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    portacruise Senior Member

  7. BertKu
    Joined: May 2009
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Mechanism

    Thank you Porta,

    It gives me a good idee, how they converted the wave motion into the fin motion.
    Thanks
    BertKu
     
  8. portacruise
    Joined: Jun 2009
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    portacruise Senior Member


  9. BertKu
    Joined: May 2009
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    Location: South Africa Little Brak River

    BertKu Senior Member

    Thank you Porta,

    It is a very interesting concept. Something what Rick in Australia could consider as an additional method to power his venture.

    BertKu
     
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