Hello! I am an HVAC student in Wichita, KS. Yesterday, our instructor was teaching us how to plot on Pressure-Enthalpy charts also called Pressure-heat charts or Mollier Diagrams. Unfortunately he really did a bad job of showing us how to do it, and we all left class confused. I was wondering if someone could provide some good links or information to help me understand how to plot my data on the chart.
We were working with R-22 and these are my readings. Keep in mind, the trainer machines we have are nearly 20 years old and have been abused over the years.
72 PSIG = 42degF
Suction Line Measured: 59degF
220 PSIG = 107degF
Liquid Line Measured: 103degF
So, how would I plot this data on an R-22 Pressure-Enthalpy diagram?