Re: PROBLEM IN FINDING THE STEPS OF AN EQUATION
- From: "David " <dave@xxxxxxxxxxxxxx>
- Date: Thu, 28 Feb 2008 11:30:07 +0000 (UTC)
"ASHA CHANDRAN" <aaash.nair@xxxxxxxxx> wrote in message
<fq5lod$5uq$1@xxxxxxxxxxxxxxxxxx>...
Hello Everyone,correct
I have to find out the output of an equation using the
MATLAB. But found some errors. If any one knows the
steps of this equation, please help me…………………
N
My equation is………….. WPD = [(1/2)*ρ*∑ ((Ui) ^3)]
i=1YOU
Here Ui is the individual wind speeds.
N=4320;
Ρ =1.225;
WPD is the Wind Power Density.
Hope I will get a correct choice for this equation.
WAITING FOR YOUR VALUABLE REPLIES………………………..
NOTE: THANK YOU SOO MUCH FOR THE VALUABLE SUPPORT WHICH
PEOPLE ARE GIVEN TO ME IN MY LAST LETTER.CHANDRAN
ASHA S
M.Tech(ENERGY
MANAGEMENT)D.A.V.V,
S.E.E.S,
INDORE,
MADHYAPRADESH,
INDIA,
what did you try that you don't think work. if i am
reading your equation properly this is what i think...
assuming U(1:N) is your wind speed i would use:
WPD = .5*P*sum(U(1:N).^3)
note the '.' before the ^ to cube the individual elements
of U before summing.
i don't know exactly what your WPD is supposed to
represent, but somehow summing a bunch of cubed wind
speeds seems to be missing something. Is this then
multiplied by some area that the wind was measured over?
i would kind of expect a 1/N factor in there somewhere to
average the cubed speeds over all measurements or
something like that... otherwise the WPD would just keep
increasing with the number of samples which doesn't make
sense unless there are more to the calculations than what
you show.
.
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- From: ASHA CHANDRAN
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