Refrigeration 101

[Gary]

Hello,
Here is a question from a newbie of both the forum and the world of refrigeration!
You see the terms evaporating temperature, condensing temperature in the literature. My question is where exactly these values are measured from? For example if we take the evaporating temperature; is it measured from the entrance or the exit of the evaporator?
Thanks in advance!

The evaporating temperature is the saturation temperature which corresponds to the low side pressure on a pressure/temperature chart.

The condensing temperature is the saturation temperature which corresponds to the high side pressure on a pressure/temperature chart.