2. By: Nawaz Haider Bashir SESE_Science GHS Patti Bulanda
Wind Energy
By:
Nawaz Haider Bashir
SESE_Science
GHS Patti Bulanda

3. Wind The natural movement of the air
Especially in the form of a current of air blowing from a particular direction

4. Wind Energy
Electrical energy obtained from the wind with turbines.

5. History of Wind Energy 5000 BC
Sailboats used on the Nile indicate the power of wind AD
First windmills developed in Persia
1300 AD
First horizontal-axis
windmills in Europe
1850s
Daniel Halladay and
John Burnham build
Halladay Windmill;
start US Wind
Engine Company
Late 1880s
Thomas O. Perry
conducted 5,000
wind experiments;
starts Aermotor Company
1985
wind capacity
exceeded 1,000 MW
1993
US Wind Power developed
first commercial variable-speed wind turbine
2004
Electricity from
wind generation
costs 3 to 4.5 cents per kWh
2011
Wind power provided
over 12% of renewable
energy used in US

6. Renewable Electric Capacity Worldwide

7. Wind Turbines
Wind turbines convert the kinetic energy in the wind into mechanical power
This mechanical power can be used for specific tasks (such as grinding grain or pumping water)
Generator can convert this mechanical power into electricity to power homes etc

8. Wind Turbine Types
Vertical axis Turbine
Horizontal axis Turbine

9. Main components of Wind Turbine

10. Cont…
Anemometer: Measures the wind speed and transmits wind speed data to the controller. Blades: Rotates when wind is blown over them, causing the rotor to spin. Most turbines have either two or three blades. Brake: Stops the rotor mechanically, electrically, or hydraulically, in emergencies.

11. Cont…
Gear Box: Connects the low-speed shaft to the high- speed shaft and increases the rotational speeds from about rotations per minute (rpm), to about 1,000-1,800 rpm; this is the rotational speed required by most generators to produce electricity. Generator: Produces AC electricity High-speed shaft: Drives the generator. Low-speed shaft: Turns the low-speed shaft at about rpm.

12. Cont…
Nacelle: Sits atop the tower and contains the gear box, low- and high-speed shafts, generator, controller, and brake. Pitch: Turns blades out of the wind to control the rotor speed. Rotor: Blades and hub together form the rotor. Tower: Made from tubular steel or concrete. Wind vane: Measures wind direction

14. Wind Farm

15. Electrification Through Micro Wind Turbines in Pakistan
600 houses have been electrified in Sindh and Balochistan through installation of small wind turbines systems.
4 Guard Check Posts at Lasbela have been electrified.
5 villages have been provided with battery charging facilities through a wind-powered battery-charging center.

16. ADVANTAGES OF WIND POWER
The wind is free and with modern technology it can be captured efficiently.
Does not cause green house gases or other pollutants.
Although wind turbines can be very tall each takes up only a small plot of land. This means that the land below can still be used. This is especially the case in agricultural areas as farming can still
continue.

17. ADVANTAGES OF WIND POWER
Those areas that are not connected to the electricity power grid can use wind turbines to produce their own supply.
Many people find wind farms an interesting feature of the landscape.
Wind turbines are available in a range of sizes which means a vast range of people and businesses can use them. Single households to small towns and villages can make good use of range of wind turbines available today.

18. DISADVANTAGES OF WIND POWER
The strength of the wind is not constant and it varies from zero to storm force. This means that wind turbines do not produce the same amount of electricity all the time.
Wind turbines are noisy
Wind turbine construction can be very expensive
Wildlife impacts (5%)

19. Conclusion Wind energy is pollution free and nature friendly
Wind energy has very good potential and it is the fastest growing energy source
The future looks bright for wind energy because technology is becoming more advanced and windmills are becoming more efficient