CP3B Energy efficiency Flashcards
1
Q
What does dissipation mean
A
When energy is spread out and wasted
2
Q
How can friction be reduced
A
Using lubricants. e.g oil
3
Q
What is energy efficiency
A
A way of describing how good a machine is at transferring energy into useful forms and is given in a number between 0 and 1
4
Q
How do you calculate energy efficiency
A
Efficiency = (useful energy transferred by the device)
—————————————————–
(total energy supplied to the device)
5
Q
How can you increase the efficiency of a device or process
A
Reducing the amount of wasted energy and for mechanical process this means reducing friction
