# Dryness Fraction question

rubberduckie
With the use of Ammonia (R717) properties table, find the enthalpy of the refrigerant if the saturation temperature is -10C and the dryness fraction, x, is 0.9.

can anyone help me with this? i do not understand the use of dryness fraction
Many thanks!

Staff Emeritus
Check one's text, but if 'dryness' is like steam quality, then it refers to the fraction of a saturated two phase system which is gas (vapor), as opposed to the other fraction which is liquid.

I assume dryness does not refer to the water content, which would lead to ammonium hydroxide, or 'aqua' ammonia.

This might be of interest - http://www.tannerind.com/anhydrous-ammonia.html

http://www.iifiir.org/en/doc/1055.pdf

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