Deck 11: Wind Turbine Power Measurements and Mechanical Construction

Question 1

According to Betz's Law, what is the maximum limit of converting wind energy to power?

Answer 1

0.593 or 59.3%

Question 2

If wind speed doubles and density and area remain constant, wind power increases by a factor of eight.

Answer 2

True

Question 3

A(n) ____________ converts slowly rotating high torque to higher rotating lower torque.

Answer 3

gearbox

Question 4

The 1/7 Power Law is used to extrapolate wind speed at a new height from the speed at an old height.

Question 5

Where is the generator located on a Horizontal Axis Wind Turbine?

Question 6

List four factors that can affect Annual Energy Output.

Question 7

Physical properties of the land have no effect on the speed and turbulence of the wind.

Question 8

A wind turbine __________ (can/cannot) capture all of the available wind power.

Question 9

What is a wind turbine?

Question 10

Wind turbine designs must consider speed control to prevent mechanical damage and control generator power output when the system is operating above rated speed.

Question 11

Power is directly proportional to the ___________ that captures the wind.

Question 12

Write the equation for wind power density.

Question 13

_____________ factor = actual output/rated output.

Question 14

________________ is a rapid change in direction and speed caused by obstacles in the wind's path.

Question 15

All of the energy from wind flowing past a point can be recovered.