Design and manufacturing of a composite wind turbine blade

1
Design and manufacturing of a composite wind
turbine blade

• Team members
• Saeed Humaid 200000132
• Saleh Ali 199900262
• Advisor Dr. Adel Hammami
• Coordinator Dr. Mohamed Abdul - Hafez

2
Plan of the presentation

• Introduction
• Project description
• Wind turbines
• Wind condition
• Aerodynamic properties
• Blade design
• Pattern
• Conclusion

3
Introduction

• The wind energy is one of the oldest sources of
  energy
• The wind energy was substituted by fossil fuel
• With the first oil price shock, the interest in
  the wind power re-emerged
• During the last 20 years, the use of wind
  turbines rapidly increased

4
Introduction
5
Introduction
6
Project Description

• The main objective of this project is to design
  and manufacture a mold for a composite wind
  turbine blade.

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Project tasks

• literature survey
• Wind conditions in the UAE
• Aerodynamic properties
• Pattern
• Mold

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Main Components of a Wind Turbine
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Types of wind turbines

• Aerodynamic drag
• Aerodynamic Lift

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Types of wind turbines

• aerodynamic lift can divided according to the
  orientation of the spin axis into
• horizontal-axis
• vertical-axis

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Difference between small and large wind turbines
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Blade Design
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Al Fujairah wind distribution
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Al Fujairah wind distribution

• It was observed that
• The south west direction was selected
• The wind velocity will be 20 knots for 788 hours
  a year.

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Energy extraction
.P Power produced (Watt) .? Air density
(Kg/m3) .A Cross sectional area (m2) .Va
Apparent wind speed (m/s) .CP Power factor
coefficient
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Design approach
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The fixed properties
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The relation between the shaft power and the wind
speed for different rotor diameter
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The relation between the shaft power and the wind
speed for different rotor diameter
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The Calculation

• Assumptions
• ? Air density 1.2 (Kg/m3)
• Rotor diameter 4 (m)
• a Angle of attack 8 (degree)
• ? Tip speed ratio 6

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Calculation the required properties in designing
the blade

• FL Lift force (N)
• FD Drag force (N)
• CL Lift Coefficient
• CD Drag Coefficient
• ? Air density (Kg/m3)
• A Blade area (m2)
• Va Apparent wind speed (m/s)

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Calculation the required properties in designing
the blade

• F Apparent wind angle (degree)
• ß The blade angle (degree)
• a Angle of attack (degree)

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Calculation the required properties in designing
the blade
? Tip speed ratio
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A small wind turbine design notes

• Assuming that
• Neglecting drag force
• CL 1
• COS (F) 1

This equation works best for the outer part of
the blade only
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Calculation the required properties in designing
the blade

• Cp Power coefficient

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Optimize the chord width
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Optimize the chord width
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Optimize the chord width
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Selecting the airfoil

• Drawing the airfoil
• Airfoil selection is NACA 4412
• NACA 4412 best performance is for Reynolds Number
  gt250,000

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Selecting the airfoil
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Calculation of Reynolds number
For Apparent wind speed Va 10(m/s),
Characteristic length d 0.377(m) and air
viscosity ? 1.46e-5(m2/s). Then Re 258219 gt
250000
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Design
33
Design
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Pattern

• The pattern is an object which is exactly the
  shape of the blade. Which is used to build the
  mould for the blade. There are various ways to
  make a pattern such as
• CNC (Computer Numerically Controlled)
• Foam forming
• Wood patterns
• Metal patterns

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Design
36
Pattern
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Pattern
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Conclusion

• Difficulties
• Environmental impact
• Fujairah project

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Environmental impact

• Visibility
• Noise Factors
• Effects on Wildlife

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Fujairah Project

• Three station in different locations
• Total power22.95 Mw
• Total number of turbines27
• Each turbine gives850 Kw
• Rotor diameter58 m
• The height55 m
• Each turbine cost1-1.3 million dollar

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Conclusion

• Questions