Topic 1 Efficiency
Define the thermal efficiency of a heat engine.
Topic 2 Carnot Engine
What is the thermal efficiency of a Carnot engine in terms of the temperatures of the heat source and heat sink?
Topic 3 Heat Pumps
Define
(a)
the Coefficient of Performance of a heat pump
(b)
the efficiency of a heat pump
Examples
What is the maximum efficiency of an engine running on hot coffee? Assume room temperature heat sink.
An air conditioner pumps heat from 25o C inside to
33o C outside at the rate of 25 MJ per hour with
an efficiency of 50%. What is
(a) the ideal Coefficient of Performance,
(b) the energy per hour drawn from the power company, and
(c) power required
Textbook Problems
|
Level |
Do to hand in |
Read and do for yourself |
| A | 1, 6 | 3 |
| B | 1, 4, 6, 8 | 3, 9, 11, 12 |
| C | none | none |