What is the definition of superheat?
In simple way to explain to someone?
I think ZACH's explanation is the easiest for a layman to understand: "It is the amount of heat add(ed) to a refrigerant after it has already turned to a vapor from a liquid." The reason we measure superheat is to make sure that the liquid refrigerant in the evaporator coil has fully changed from a liquid to 100% a vapor, since we only want vapor returning to the compressor suction. If any liquid gets sucked in, it can do bad things to the compressor over a period of time. We want just enough superheat to verify a 100% vapor, but not too much because it would hurt the cooling efficiency of the unit, and excessively high superheat would also not keep the hermetic (fully encapsulated) motor/compressor cool enough. So, you want some superheat but not too much.
Thanks i didnt want to get into p/t charts its easier to just tell them its used to cool the compressor and to make sure it is completely vaporized before it come back to the condenser. Then they cant really follow that most of the time.
Remember we think completely different from laymen.
Superheat is very important to the system operation and longevity. Believe it or not, there are lots of repair men out there that don't know how to check it or what it is. Fortunately superheat was drummed into us at tech school (ITT)
Have you ever heard anyone call it "cool back"? I had a couple guys asking me for troubleshooting help one time and they were calling it cool back. It only became really confusing when they said "they didn't have any cool back". LOL Then I had to make them say the correct terminology and ask if it was too low or too high...... HEHE