Mechanics & Maintenance

Question 1

A wind turbine from age 10-15 will increase how much in maintenance cost?

Answer 1

15%

Question 2

What are the methods for inspecting blades?

Answer 2

1st) Visual
2nd) Tap testing
3rd) Ultrasonic

Question 3

How much energy is the typical lightning strike?

Answer 3

55 kWh
of energy is the typical lightning strike produces.

Question 4

What is the difference between a direct drive generator and a gearbox generator?

Answer 4

Direct Drive Generator:
- Larger
- On-shore turbines

Gearbox Generator:
- Smaller
- Off-Shore

Question 5

1) Installation difference between pitch angle of of three blade by 1.2 delta takes ? year out of the lifespan.
2) How do you fix it?

Answer 5

1) 1.2 delta difference between pitch angle of three blade takes 6 year out of the lifespan.
2) Tighten bolts

Source: Morten Handberg of Wind Power Lab