Wind energy

Question 1

Wind uses natural win to generate ____________ power

Answer 1

Mechanical

Question 2

What is the life span for wind turbines

Answer 2

20-30 years, which is quite long

Question 3

Are wind turbines cost effective

Answer 3

Yup!

Question 5

Why does the wind turbine have intermittent power generation

Answer 5

They only generate power when the wind is blowing
The power output is unsteady and cannot always meet demand

Question 6

Are wind turbines expensive

Answer 6

yup, and their expensive to install

Question 7

Wind turbines are often built in remote locations, what can be a problem associated with this

Answer 7

They require power lines to be constructed to them . This adds to the cost

Question 8

What are the four disadvantages of wind energy

Answer 8

intermittency power generation
high initial cost
remote locations
dependency on wind conditions

Question 9

Can wind turbines be built anywhere in the world and be efficient

Answer 9

no, they can only be utilized in areas in sufficient wind

Question 10

What are the two versions of wind turbines and which one is more efficient

Answer 10

There is the horizontal axis wind turbine - HAWTs, and the Vertical axis wind turbine - VAWTs. The HAWTs is more efficient

Question 11

What are the classifications of HAWTs

Answer 11

single blade
double blade
three bladed
multi bladed

Question 12

What are the classifications of VAWTs

Answer 12

savonius
Darrieus-rotor
Helix shape
H-darrieus
Magnus
Vortex

Question 13

What are the three key wind speeds in turbine operation

Answer 13

cut-in speed
rated speed
cut-out speed

Question 14

describe cut-in speed

Answer 14

Minimum wind speed required
to generate useful power.

Question 15

describe rated speed

Answer 15

This is the maximum wind speed the wind turbine can receive to output the maximum quantity of power

Question 16

Describe cut out speed

Answer 16

past rated speed is when the wind speed is too high for the wind turbine to produce useful energy. The turbine must be stopped for safety reasons

Question 17

Define mechanical energy

Answer 17

Energy that can be entirely
converted to mechanical work through an ideal
mechanical device.

Question 18

define flowing fluid energy

Answer 18

the mechanical energy of a fluid (like air) can be captured and converted into useful work by the turbine