Enthalpy of air / vapor mixture
Enthalpy of air / vapor mixture
(OP)
Hi everyone,
I'm out of my depth with this area and I'm hoping you can help. I'm trying to determine the enthalpy of air with some moisture at around 600 degrees Fahrenheit and atmospheric pressure. Would I do this by adding the enthalpy of dry air to the enthalpy of superheated steam at 600 deg F (weighted by the masses of air and water, respectively)?
Thanks,
vroma
I'm out of my depth with this area and I'm hoping you can help. I'm trying to determine the enthalpy of air with some moisture at around 600 degrees Fahrenheit and atmospheric pressure. Would I do this by adding the enthalpy of dry air to the enthalpy of superheated steam at 600 deg F (weighted by the masses of air and water, respectively)?
Thanks,
vroma





RE: Enthalpy of air / vapor mixture
Good luck,
Latexman
RE: Enthalpy of air / vapor mixture
Thanks again,
vroma
RE: Enthalpy of air / vapor mixture
Good luck,
Latexman
RE: Enthalpy of air / vapor mixture
Since only enthalpy differences have any usefulness, there is no problem with having components in a mixture use different zero enthalpy basis - until you have a change in composition due to reaction (eg. combustion). Then you must use caution, and not use enthalpy differences between input and exhaust as heat of reaction.
RE: Enthalpy of air / vapor mixture
Here is a URL contaning a free online calculator for air:
http://members.aol.com/engware/calc1.htm
Thanks,
Gordan
Gordan
http://engware.i-dentity.com
RE: Enthalpy of air / vapor mixture
Table A-5 of Holman's Heat Transfer, McGraw-Hill, gives the thermophysical properties for air at atmospheric pressure.