Dryness Fraction: Dry or Wet Steam?

[bill nye scienceguy!]

does a high dryness fraction mean that the steam is dry or wet?

 

[FredGarvin]

Dryness fraction? Do you mean quality?

 

[bill nye scienceguy!]

possibly two different names for the same thing?

what I am talking about is the amount of unboiled water left in the steam.

its used in the enthalpy and entropy equations:

h= hf + x[dryness fraction].hfg

s= sf + x.sfg

 

[HallsofIvy]

does a high dryness fraction mean that the steam is dry or wet?

possibly two different names for the same thing?

what I am talking about is the amount of unboiled water left in the steam.

its used in the enthalpy and entropy equations:

h= hf + x[dryness fraction].hfg

s= sf + x.sfg

If a high "dryness factor" means there is a lot of unboiled water (i.e. water vapor) left in the steam, then I would think that would mean the steam is wet. I'm surprised they would call that "dryness"!

 

[bill nye scienceguy!]

i looked further into my notes and i think it actually means the fraction of water that has been boiled into steam, explaining 'dryness'. thanks for your input!