For 6/10/05
Using the steady flow energy equation. Work and Heat transfer.
Refrigeration.

The basic cycle.
1-2 Compression:Increase in pressure (from 100% dry to Superheated vapour)
2-3 Condensing (from Superheated vapour to Liquid)
3-4 Expansion Valve: Decrease in pressure
4-1 Evaporation Liquid to dry saturated vapour.

The change in Enthalpy between 1 and 2 will be significant.

Processes:

Polytropic
Adiabatic
Isothermal
Know the formulae for Q and W and be able to manipulate the equations between Pressure, Volume and Temperature.