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Math Help - Mini Hydropower

  1. #1
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    Sep 2011
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    Mini Hydropower

    I'm trying to find the existing flow through a culvert above a proposed mini-hydropower site. A stick takes 10 seconds to pass through the pipe. Please shout up if you need anymore information, and thanks.

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  2. #2
    Super Member
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    Nov 2007
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    Trumbull Ct
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    Re: Mini Hydropower

    Hi unclejonsson
    This post belongs in other topics.Formula for mean velocity V = 1.5 R^2/3*s^1/2 Divided by n (ft sec units)
    R = hydraulic radius (area of shaded area at head end)/( wetted perimeter)
    s is gradient ft per ft of length
    n is a roughness factor
    Area 1.84 sq ft,wetted perimeter 3.47 ft,s= .012. n = .012 smooth surface
    V=8.9 fps Q= VA = 8.9 *1,84= 16.4 cfs
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