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Optimized Blade Design for Homemade Windmills

32 bytes added, 19:30, 30 January 2011
Undo revision 158716 by (talk)
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=== <br>'''Maximum Possible Efficiency''' ===
<br>The ['_law#Three_independent_discoveries_of_the_turbine_efficiency_limit, Benz Betz limit] was developed by Albert Benz Betz and is intended to represent the maximum possible energy that a device can derive from a stream of fluid at a given speed. In the case of windmill, the maximum theoretical efficiency of a thin rotor can be found based on the following assumptions:
The Benz Betz limit has&nbsp;predicted the theoretical maximum value for the power coefficient to be 0.593. This means that the theoretical limit of power removed from the fluid is 59.3%. In comparison, commercial wind turbines are currently able to achieve 40 - 50% conversion due to slight inefficiencies related to the blade design and mechanical process.<ref>Gorlov A.M., Silantyev V.M., Limits of the Turbine Efficiency for Free Fluid Flow, Journal of Energy Resources Technology - December 2001 - Volume 123, Issue 4, pp. 311-317.</ref>
=== <br>'''Optimal Angle of blades''' ===
[[Image:Blade Angle cos cos sin.jpg|left|470x274px|Blade Angle cos cos sin.jpg]]
= References =

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