Vertical Axis Wind Turbine Power Estimation

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SUMMARY

The calculation of the power coefficient for a vertical axis wind turbine (VAWT) involves understanding key parameters such as lift coefficient, drag coefficient, angle of attack, rotational speed, and airfoil dimensions. The discussion highlights the importance of adhering to Betz's Law, which states that the maximum theoretical power extraction is limited to 16/27 of the kinetic energy of the wind. The user encountered an issue where their calculated power coefficient exceeded 1.0, indicating a miscalculation. A simpler estimation method is recommended, targeting 50% to 100% of the maximum theoretical power as defined by Betz's Law.

PREREQUISITES
  • Understanding of lift and drag coefficients in aerodynamics
  • Familiarity with Betz's Law and its implications for wind energy
  • Knowledge of rotational dynamics and speed calculations
  • Basic principles of airfoil design and dimensions
NEXT STEPS
  • Research the calculation methods for power coefficient in vertical axis wind turbines
  • Study the application of Betz's Law in wind turbine efficiency analysis
  • Explore aerodynamic principles related to lift and drag coefficients
  • Learn about the impact of angle of attack on turbine performance
USEFUL FOR

Engineers, renewable energy researchers, and students interested in wind turbine design and optimization will benefit from this discussion.

Thusithatck
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Hello,

Can some explain to me how to calculate the power coefficient of a vertical axis wind turbine.

If you explain the steps invloved would be great or any external file location where I could refer.

I have below information

1) Lift Coefficient.
2) Drag Coefficient.
3) Angle of attack.
4) Rotational Speed.
5) Airfoil Dimensions.

Furthermore, I know how to calculate the tangential force coefficient (Ct) as well. I have tried to calculate the power coefficient, but it gives me a value over 1.0 which is impossible.

Looking forward to hearing
 
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I would use a simpler calculation, estimating 50 to 100% of the maximum theoretical power given by Betz's Law. Which is the the turbine power must be less than 16/27 of the kinetic energy of the wind going through the turbine.

https://en.wikipedia.org/wiki/Betz's_law
 

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