1. From the PV diagram, draw the refrigeration cycle, which replicates the process the fluid undergoes inside the refrigerator (at approximately 4C) and outside the refrigerator (at approximately 20C). Remember to:
   1. Draw the 20C and 4C isotherms to your plot so that you can properly map the process.
   2. Indicate the four stages of the process as either vaporizer, condenser, compressor or expander stages.
   3. Identify the stage where the heat is gained or lost by the refrigerant, and where work is exerted on the refrigerant.
   4. The stage where the refrigerant is cooling the fridges contents.

Temp (C)	Pressure (bar)	Spec. Volume of Saturated Liquid (m3/kg)	Spec. Volume of Saturated Vapour (m3/kg)
0	2.9282	0.0007721	0.0689
4	3.3765	0.0007801	0.0600
20	5.7160	0.0008157	0.0358
60	16.813	0.0009488	0.0114
100	39.742	0.0015443	0.0027
101.06	40.593	0.0019535	0.0019535

2. What is the operating pressure of the lines in the refrigerator and the lines in contact with the room outside the refrigerator?

3.Describe how a set of PVT data can be measured in a lab.

4500 4000 3500 3000 Pressure (kPa) 2500 2000 1500 1000 500 0 0.0001 0.001 0.1 1 0.01 Specific Volume (m/kg) Bubble Dew 4500 4000 3500 3000 Pressure (kPa) 2500 2000 1500 1000 500 0 0.0001 0.001 0.1 1 0.01 Specific Volume (m/kg) Bubble Dew