Mixtures problem

[Nicola]

Hi Ian,

I am an italian student and i'm using CoolProp for my thesis. I am using FORTRAN 90/95 as programming language. Can you give me an example of mixture (not predefined) code please?
I have problems with syntax of PropSI function. For example: Argon-Helium and R32-R134a mixtures, what is R32-R134a function and how can i use it?

Best regards.

[Reiner Johannes Mayers]

Hello,

use it like this :

from CoolProp.CoolProp import PropsSI

define your mixture with molar fractions that sum up to 1 :

R410A='HEOS::R32[0.697614699375863]&R125[0.302385300624138]'

PropsSI('P','Q',1,'T',293.15,R410A)/100000
14.429765415782992

result in bar (Pascal/100000)

/Reiner

[Ian Bell]

Reiner is right about how to define your own mixture.

R32 and R125 are refrigerants: http://www.coolprop.org/fluid_properties/PurePseudoPure.html#list-of-fluids

To get a 50% molar mixture of argon and helium, you could do:

PropsSI('D','T',300,'P',101325,'HEOS::Argon[0.5]&Helium[0.5]')

but be warned, mixtures with Helium are not very accurate as they are difficult to model properly.

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