NIST REFROP - Thermodynamic calculations in Labview

[MSIEV]

Hello,

I currently use Labview 2018 64 bits. NIST REFPROP 9.1 is also installed.

I have to write a VI which can access to thermodynamic properties of R134a & R1234yf fluids and perform calculations.

However, I do not find any Labview package for Refprop.

I saw some Labview Refprop wrappers available for Labview 2021 and Refrop 10.0.

Should consider an upgrade to be able use these wrappers ?

Is there any other solution (in order to run thermodynamic calculations) compatible with my current software versions ?

Thanks

[GerdW]

Hi MSIEV,

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@MSIEV wrote:

Should consider an upgrade to be able use these wrappers ?

Is there any other solution (in order to run thermodynamic calculations) compatible with my current software versions ?

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I used RefProp with LabVIEW 2014 and 2017 successfully, so you don't need to upgrade. I used LabVIEW-32bit, this might be an issue with your 64bit version!

Other solutions I used are FluidProp, which was used as the wrapper around RefProp to employ a more simple API.

[MSIEV]

Hello GerdW,

Thanks for your reply, I will investigate for FluidProp solution.

[d_mc]

Hi MSIEV, I know this is an old thread, but I was wondering if you had any luck getting the thermo table to work in Labview.  I need to do the same thing but with R290.  I need to be able to calculate and use thermo properties from temps and pressures I will be measuring.  I would like to get them dynamically as the temperature and pressure data is measured in order to calculate capacities at the evaporator and condenser with changing conditions.  Thanks

[MSIEV]

Hello,

My current solution is to make thermodynamic calculation in Excel Refprop via ActiveX.

This is not 100% satisfying because I can not get the thermodynamic data updated in dynamic.

However, now I have updated Labview version to 2025 so I have to continue to investigate how to implement Refrop in a VI.