wind mills

17
ELECTRICITY GENRATION THROUGH WIND MILLS Presented by- SHAKIL MUHAMMAD UET PESHAWAR PAKISTAN

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Page 1: Wind mills

ELECTRICITY GENRATION THROUGH WIND MILLS

Presented by-SHAKIL MUHAMMAD

UET PESHAWARPAKISTAN

Page 2: Wind mills

Electricity is energy transported by

the motion of electrons

We do not make electricity, we CONVERT other energy sources into electrical energy.

Conversion is the name of the game

Page 3: Wind mills

Faraday Effect

Basic ConceptsVoltage V – Potential to Move Charge (volts) Current I – Charge Movement (amperes or amps) Resistance R = V/I(R in =ohms) Power – P = I*V= I2xR (watts)

Page 4: Wind mills

How Does a Generator Work?

Page 5: Wind mills

Electricity!

• How much would it cost to run this 100 Watt bulb for a full day (24 hrs)?

• 100 Watts x 24 hours = 2400 Watt Hours (2400 Watt Hours = 2.4 Kilowatt Hours)

• What about this 25 Watt CFL light bulb, which produces the same amount of light?

• 25 Watts x 24 hours = 600 Watt Hours (600 Watt Hours = 0.6 Kilowatt Hours)

More efficient light bulbs are great, but what is the BEST way to conserve electricity and reduce our consumption of fossil fuels???

Page 7: Wind mills

What is “Renewable Energy”?

Page 8: Wind mills

Types of Electricity Generating Windmills

Small (≤10 kW)• Homes• Farms• Remote Applications (e.g. water pumping,

telecom sites, icemaking)

Large (250 kW - 2+MW)• Central Station Wind Farms• Distributed Power

Intermediate (10-250 kW)• Village Power• Hybrid Systems• Distributed Power

Page 9: Wind mills

Wind Turbine COMPONENT

Page 10: Wind mills
Page 11: Wind mills

Wind Turbine Perspective

Nacelle56 tons

Tower3 sections

WorkersBlade

112’ long

Page 12: Wind mills

Large Wind Turbines450’ base to bladeEach blade 112’Span greater than 747163+ tons totalFoundation 20+ feet

deepRated at 1.5 – 5 megawattSupply at least 350

homes

Page 13: Wind mills

Yawing – Facing the WindYawing – Facing the Wind

Active Yaw (all medium & large turbines produced today, & some small turbines from Europe) Anemometer on nacelle tells

controller which way to point rotor into the wind

Yaw drive turns gears to point rotor into wind

Passive Yaw (Most small turbines)

Wind forces alone direct rotorTail vanesDownwind turbines

Page 14: Wind mills

Importance of Wind Speed No other factor is more

important to the amount of power available in the wind than the speed of the wind

Power is a cubic function of wind speedV X V X V

20% increase in wind speed means 73% more power

Doubling wind speed means 8 times more power

Page 15: Wind mills

Calculation of Wind Power

•Power in the wind Effect of air density, ρEffect of swept area, AEffect of wind speed, V

R

Swept Area: A = πR2 Area of the circle swept by the rotor (m2).

Power in the Wind = ½ρAV3

Page 16: Wind mills

Environmental Impact Assessment

Page 17: Wind mills

THANKS FOR TIME