Wind TurbinesCompared to other renewable energy

How wind was used in past• Sailors• Farmers• Wind mills

The Average Wind Turbine…• Is as tall as a 20-story building• three 200-foot-long (60-meter-long) blades

How Much Energy Does It Produce

• Depends on : size, location and wind speed• Biggest can power 1,400 homes• Range from 100 kilowatts to several megawatts• 1.5 MW × 365 days × 24 hours × 25% = 3,285 MWh = 3,285,000 kWh

How It Works

Countries Using Wind Turbines1. China2. The United States3. Germany

4. Spain5. India6. Italy

The top wind turbine manufacturers 2011

Country Name of Company

Market share in 2011

Delivery 2011 in MW

Totally installed

power in GW

Denmark Vestas 12.7% 5,217 50 [2]

China Sinovel 9.0% 3,700 13 [3]

China Goldwind 8.7% 3,584 [4]

Spain Gamesa 8.0% 3,308 24

Germany Enercon 7.8% 3,203 24

United States GE Energy 7.7% 3,170

India Suzlon Group

7.6% (inc Suzlon Energy, India and RE power, Germany)

3,116 20

China Guodian United Power

7.4% 3,042

Germany/Denmark Siemens Wind

Power6.3% 2,591 6.7 [5]

China Ming Yang 3.6%[citation needed] 1,500[

citation needed]

Benefits• Wind is free and abundant (in some areas)• No air or water pollution• Generates a lot of power • A source of power during power outage• Permanent energy• Available around the globe• Operation cost nearly zero

Cons• Typically 10% - 40% efficient• Wind variable

• Kills bats and birds• Not as many as cars, power lines, and high-rise buildings

• Wind energy can only be stored with a battery• Lightning • Noisy• Ugly

The Comparison

Wind VS. Solar

Wind

• Wind energy is created by solar energy • Wind energy work 24/7• All countries have wind

Solar

• Wind energy is created by solar energy • Solar doesn’t work at

night• Solar costs more

Wind VS. Biomass

Wind

• Wind turbines does not produce greenhouse gases• Can pay off the energy

spent in 4-5 months

Biomass

• Biomass is used for fuel, heat and electricity• Biomass burns • Causes greenhouse gases

• Takes more energy than can be produced

Wind VS. Hydro

Wind

• 10% - 40% efficient• Wind isn’t constant• Locations are easy to

find

Hydro

• Incredibly efficient• Water flow is constant• Most wildly-used in 2006• Hard to find good

location

Wind VS. Geothermal

Wind

• Does not produce pollution or greenhouse effect• Locations are easy to

find

Geothermal

• …is heat energy stored inside the earth• Location : near tectonic

plates• Not very many • More locations available

with new technologies• Does not produce

pollution or greenhouse effect

Conclusion

• Wind energy is the fastest growing • Used world wide • Permanent source of energy • No pollution or greenhouse gases• Operation cost nearly zero• Different sizes generate different amounts of energy• Better than Biomass and Solar Energy• Geothermal and Hydro are other good renewable

energies

My Wind Turbine

The End Thanks for listening