Using refprop tables in LabVIEW

[Ronaldo_Schwarz]

I am developing a program that has to convert temperature to pressure using tables generated by NIST Refprop. Has anybody already developed this routine?

[Helmut Hullen]

Hallo, Ronaldo,

Du (x) meintest am 20.12.01:

> I am developing a program that has to convert temperature to
> pressure using tables generated by NIST Refprop.

Big and fast: use look-up-tables.

Greetings!
Helmut

Please excuse my gerlish!

[jacbenimble]

Hello,

I was wondering if anyone has ever completed an application accessing REFPROP from NIST.

I have used other DLL’s with the CIN tool but can not seem to make this REFPROP DLL work.

If anyone has a code snippet showing the settings of the CIN tool that is using REFPROP, it would be greatly appreciated.

[Will_Crowe]

Hi,

I managed to get labview to read fluid properties from Refprop, but only for a pure fluid refrigerant (CO2, R134A etc.) but not for a mixture. There is some way to call the DLL's to set up for a mixture, but as yet I haven't got this to work. There seems to be a discrepency between the calls on the DLL in the labview program that they sent me, and the documentation on this DLL.

If you want a VI that sucessfully pulls data on a pure fluid from Refprop, I can sent one on to you.

Alternately, if you know how to read data on a mixture, I'd really appreciate a dig out on whatever small thing that I'm doing wrong.

Will