Help! Need properties!
Help! Need properties!
(OP)
Hi everyone, we are sizing a gas heat exchanger for this mixture and would like some help generating some properties on it:
N2=12.27%
CO2=43.39%
O2=1.42%
H2O=2.97%
H2S=4PPM
Need density, specific heat, viscosity, thermal conductivity, and molecular weight.
Appreciate any help/direction anyone may have.
Thanks,
Brent
N2=12.27%
CO2=43.39%
O2=1.42%
H2O=2.97%
H2S=4PPM
Need density, specific heat, viscosity, thermal conductivity, and molecular weight.
Appreciate any help/direction anyone may have.
Thanks,
Brent





RE: Help! Need properties!
David
RE: Help! Need properties!
RE: Help! Need properties!
There is no "average" in the calculation, you take mole percent times the specific property and then sum the results.
David
RE: Help! Need properties!
RE: Help! Need properties!
RE: Help! Need properties!
Once you have determined which are the important properties, concentrate your effort on them or decide whether a conservative estimate will make a large economic impact on the design. I often find that the uncertainties in the "fixed" values like flowrate, pressure and temperature are greater than the impact of the uncertainties in the properties. Looking at it this way helps to put the problem in perspective.
Katmar Software
Engineering & Risk Analysis Software
http://katmarsoftware.com
RE: Help! Need properties!
If the detailed mixing rules will improve a +/-10% calculation by 0.01% then they probably aren't worth doing. If they will reduce your uncertainty to +/-8% then they could be worth much more than you spend.
David
RE: Help! Need properties!