r134a Material in cfx

shiva3689 · May 13, 2013, 04:12

I am trying to use r134a vapour as my working fluid for the radial turbine.
For this i had selected r134av from MATERIALS-redkw.ccl, but the enthalpy values in the results generated is not matching with the fluid properties at that particular pressure and temperature.
Please help in selecting the right material.

evcelica · May 13, 2013, 21:47

Well this could have something to do with reference enthalpy (what pressure at temperature is considered Zero enthaly). Also Enthalpy does not have a universal definition, zero enthalpy could be differently from different literature, its the change in enthalpy that must be the same.

May 13, 2013, 04:12	r134a Material in cfx	#1
shiva3689 New Member Shiva Join Date: Feb 2013 Posts: 2 Rep Power: 0	I am trying to use r134a vapour as my working fluid for the radial turbine. For this i had selected r134av from MATERIALS-redkw.ccl, but the enthalpy values in the results generated is not matching with the fluid properties at that particular pressure and temperature. Please help in selecting the right material.

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May 13, 2013, 21:47		#2
evcelica Senior Member Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 1,188 Rep Power: 23	Well this could have something to do with reference enthalpy (what pressure at temperature is considered Zero enthaly). Also Enthalpy does not have a universal definition, zero enthalpy could be differently from different literature, its the change in enthalpy that must be the same.