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Demand factor definition-A dimensionless parameter for Vertical Axis Wind Turbines.

Abdul Akbar M1,2, Mustafa V1

  • 1Department of Civil Engineering, National Institute of Technology, NIT Campus (P.O), Calicut, Kerala, 673 601, India.

Methodsx
|April 13, 2019
PubMed
Summary

Researchers developed a new dimensionless parameter, the "Demand Factor," to optimize Vertical Axis Wind Turbine (VAWT) design. This factor aids in simplifying the complex process of VAWT optimization.

Keywords:
AnalyticalDMSTDemand factorDemand factor approachDragLiftOptimizationPowerStreamtubeVertical axis wind turbineWind energy

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Area of Science:

  • Engineering
  • Renewable Energy

Background:

  • Dimensionless numbers like Reynolds, Froude, and Webber numbers are crucial for comparing phenomena across scales.
  • Vertical Axis Wind Turbines (VAWTs) require effective optimization methods for improved performance.

Purpose of the Study:

  • To derive and introduce a novel dimensionless parameter, the "Demand Factor," for VAWT optimization.
  • To explore the derivational aspects and potential applications of this new factor in VAWT design.

Main Methods:

  • Input parameters (power, wind velocity, aspect ratio, air density, viscosity) and output parameters (blade length, number of blades, chord length, aerofoil shape, radius, angular velocity) were defined.
  • Multiple trials (32 combinations) of parameter arrangements were conducted to identify the most suitable expression for the Demand Factor.
  • A single-point optimization process using the derived Demand Factor was discussed, including numerical calculation steps.

Main Results:

  • A new dimensionless parameter, the "Demand Factor," was successfully derived.
  • An expression for the Demand Factor was identified after systematically evaluating parameter combinations.
  • The study outlines a method for single-point optimization of VAWTs using the Demand Factor.

Conclusions:

  • The derived Demand Factor offers a novel perspective for the design and optimization of Vertical Axis Wind Turbines.
  • This parameter has the potential to simplify and enhance the optimization process for VAWTs.
  • Further research can explore the practical implementation and validation of the Demand Factor in real-world VAWT applications.