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wind speed into fcorce conversion

Discussion in 'Renewable Energy' started by Thunderchild, Mar 10, 2009.

  1. Thunderchild

    Thunderchild New Member

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    I'm setting up a solar system (ok banter aside) and intend to track the suns course. I'm planning on using a 919D8101 motor and gear box from MFA comodrils:

    MFACOMODRILLS.COM

    so i know that my motor has a torque of 125 Kg (and a stall torque of 810) so am I firstly to assume that the gear box was made to withstand such forces in reverse, say the motor is stationery but an external force is pushing at the shaft.

    Now I will have a 36 X 54 cm solar panel exposed to the wind, how do I calculate the force of say a 70 mph wind on this surface ? the panel will be centrally pivoted and be mouted on a wall with the ability to tilt 45 deg either way
     
    Last edited: Mar 10, 2009
  2. nickelflippr

    nickelflippr Member

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    As a rule of thumb, used to use 15lbf per sq. ft. for 70mph wind loads. You could try the UBC, IBC, or some sort of building code for the actual calculation.
     
    Last edited: Mar 10, 2009
  3. Mikebits

    Mikebits Well-Known Member

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  4. dave

    Dave New Member

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  5. Thunderchild

    Thunderchild New Member

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    I'm also thinking that as the panels are pivoted at the centre surely as both sides are going to be hit evenly won't that cancel out the "twisting" force as aech half will oppose the other ?
     
  6. Thunderchild

    Thunderchild New Member

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    hm thats helpful, a I to asume that the area is in sq foot and the resulting force in pounds ?
     
  7. nickelflippr

    nickelflippr Member

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    That might be the case if the wind is normal to the panel at all times, which it won't. If the panel is given a chance to oscillate, it will do so, given the right conditions.

    Looking for a description of the solar panel frame to pivot point connection. The larger the diameter of the connection, or support of that connection, the sturdier it will be in a stiff wind. How about a boat seat swivel? They can be had at Wally World for not much.

    Another thought was a satellite tracker setup, that was made for the RV industry. There was a surplus company selling one. It had some double helical gear setup, with very low backlash.
     
  8. Thunderchild

    Thunderchild New Member

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    well at the panels will be running pretty much paralel to the wall and theres another wall oposite the wind pretty much goes in one direction I think I'll just have to give it a shot and see what happens.
     

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