Superheat

[crocens]

Hi there!

As usualy i have an unusual question

We all know (or should to know) how to messure superheat.

I was woundering why does it must be at least 4-5K ? (for EEV)

As i know untill whole liquid does not evaporate there will be no superheat becouse all energy will be used in evaporation proces.

So it should be obvius that even 1K of superheat should ensure that there is no liquid in line. But we all know there is if superheat is to low. Where does this liquid come from, how it is possible that liquid and superheated vapor, both at the same pressure in the same pipe exists?

Have a nice day, Marcin