Recent Advances in the Implementation of Wind Energy in Iran
Recent Advances in the Implementation of Wind Energy in Iran
Recent Advances in the Implementation of Wind Energy in Iran
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The 2 nd Jo<strong>in</strong>t International Conference on “Susta<strong>in</strong>able <strong>Energy</strong> and Environment (SEE 2006)”<br />
21-23 November 2006, Bangkok, Thailand<br />
2.2 Data analysis<br />
<br />
<br />
This procedure is performed by analyz<strong>in</strong>g <strong>the</strong> w<strong>in</strong>d rose, w<strong>in</strong>d speed<br />
distribution curve and <strong>the</strong> changes <strong>in</strong> <strong>the</strong> w<strong>in</strong>d speed rate per hour.<br />
To evaluate <strong>the</strong> roughness length (Z 0<br />
) we have:<br />
ln Z = ln Z 0<br />
–1/I z (1)<br />
I z<br />
is Turbulence Intensity at z height and it is evaluated as <strong>the</strong><br />
follow<strong>in</strong>g:<br />
σz<br />
I = σz<br />
/<br />
z<br />
U z<br />
(2)<br />
is <strong>the</strong> standard deviation and U z<br />
is <strong>the</strong> average speed at <strong>the</strong><br />
z height.
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