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Wind energy
The document discusses various aspects of wind energy, including its potential sources and types of wind turbines such as horizontal and vertical axis windmills. It covers the design considerations, aerodynamics, and efficiency of wind turbines, referencing principles like Bernoulli’s principle and Newton’s third law. Additionally, it highlights the importance of mechanical power transmission, blade design factors, and innovations in wind energy applications.
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Wind energy
- 1. Wind Energy Ramu Kandregula,Assistant Professor Vignan’s Institute of Information Technology Visakhapatnam
- 2. Sources Potentialsof Wind Energy Horizontal Axis Wind mill Vertical Axis Wind mill Performance Characteristics Betz Criteria Types of Winds Wind Data Measurement WIND ENERGY - Syllabus
- 3. Concept ofWind Power Existed from almost 2ooo Years History
- 4. Global Winds Local Winds Sources of Wind Energy
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- 7. Global Winds causingMonsoons
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- 9. Potentials of WindEnergy
- 10. Potential of WindEnergy in India
- 11. Horizontal Axis WindTurbine On Shore Wind Turbine Off Shore Wind Turbine
- 12. Noise Range ofWind Turbine
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- 14. Horizontal Axis WindTurbine contd..
- 15. 1. Aero DynamicalPerformance 2. Mechanical strength Criteria 3. Economical Aspects Wind Turbine Design Aspects
- 16. Multiple Theories explainingthe “LIFT” on a aerofoil Blade. Most common are the following 1. Bernouli’s Principle 2. Newtons third Law 3. Coanda Effect Lift in Aerofoil Blade
- 17. Lift Principle usingBernouli’s Principle
- 18. Lift using Newton’sThird Law Principle
- 19. Lift Using CoandaEffect Coanda Effect is the “Tendency of fluid jet to get attached to a Convex surface”.
- 20. Lift in aWind Turbine Blade
- 21. Velocity Triangle inWind Turbine Aerofoil is rotated such a way that “Blade axis is inline with Relative velocity”
- 22. Optimized Angle ofAttack
- 23. Change of angleof attach with Variable wind speeds With increasing magnitude of wind speeds, the magnitude of blade velocity and Relative velocity were changing. So Angle of attack of wind must also change to get more efficiency. So pitch control of blade will take of it.
- 24. Importance of Mechanicalpower Transmission in Wind Turbine Wind blades rotate at low speed because of following reasons. At High speeds they posses 1. More Noise 2. Less Blade Strength So the Speed of wind turbines are intentionally constrained to low speeds.
- 25. Mechanical Transmission contd.. Planetary Gear Box is used to increase the speed of Wind Turbine to suit the Electrical generator Increase in Speed Ratio ~1:90 Cut Off speed is 80Km/hr – To Limit the Damage Velocity Sensor – To Measure Wind speeds and apply breaks if needed
- 26. Blade Design Considerations Velocity of the Wind Length of the Blade Height of the wind Turbine Angle of Attack of wind speed Twist of the Blade
- 27. Length of theBlade P α L2 Problems Associated with Excess length of Blade are 1. Over Deflection of the Blade 2. Problem of Noise 3. Heavy Investment
- 28. Height of theWind Turbine
- 29. Wind Power DensityVs Height
- 30. To makesure angle of Attack should be optimum along the wind turbine Twist of the Blade along length
- 31. Efficiency isthe percentage of Wind energy utilized in the turbine and converted into useful work. Wind Efficiency
- 32. Wind Turbine EfficiencyContd..
- 33. Maximum Efficiencyis 59.3% BETZ’S Criterion Variation of Wind turbine Efficiency over the Years 1850 1900 1950 2010
- 34. Two MainFunctionalities of Wind Turbine 1. Yawing Mechanism 2. Pitch Control How to Operate HAWT against Wind Variations?
- 35. Yawing of theBlade
- 36. Pitch controlmeans rotating the blade on its axis to change the angle of attack during the change of wind direction Pitch Control of Blade
- 37. Various Other Applicationsof Wind Energy
- 38. Vertical Axis windTurbine
- 39. Vertical Axis WindTurbine
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- 41. HAWT with WindLense
- 42. Vortex Bladeless WindTurbine
- 43. Diffuser Augmented WindTurbine
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