1. WIND TURBINES DAVID BARKER

2. Which would you rather live near? ? ? Power Station Wind farm

3. How can Wind Turbines be? large

4. Wind Turbine Model to scale with buildings Doubling the rotor diameter produces a four times increase in energy output Doubling the height produces a 12% increase in wind speed

5. Wind Turbine Diagram

6. How the Gears work The gearbox converts 30 RPM to 1500 RPM – a velocity ratio of what? 30 ------- 1500 = 1 ---- 50 = (driver) 1:50 (driven) Each time the larger (driver) gear turns once, the smaller (driven) gear turns 50 times Driver Driven

7. DISCUSSION 1. How much noise do you think Wind Turbines create? 2. What percentage of Denmark’s power is produced by Wind Turbines? 3. What percentage of the UK’s power is produced by Wind Turbines? 4. Do you think Wind Turbines have much effect on the environment?

8. Facts 1. The sound from the wind turbine has the same sound level as ordinary speech. 2. Danish wind power covers almost 20% of Danish power consumption 3. In March 2004 the UK produced around 0.3-0.4% of the UK's electricity supply through wind power. 4. Wind Turbines reduce CO2 emissions and during a wind turbines lifetime it will deliver 80 times more energy than is used in its production