Thank you for the reply. I am looking at a VI that you wrote entitled "Gas Properties RefpropDLL 8.1 01-15-2009.vi". On the front panel you state "This version requires a modified mixture file HMX.BNC that includes models for Ne/CO2, Ne/He, and Ne/H2O. This eliminates need for 3 different mole fraction definitions otherwise needed for Refprop.dll calls. Version 8.1 of Refprop.dll required for C* to work." Is version 8.1 even released yet, on the FAQ page it says it will not be released for the next 6 months. Is C* dependent on version 8.1 can it be made to work with refprop version 8 if the C* dll is modified? I appreciate any help you are able to give, I get the feelin that I am just walking into the woods on this one.
I have used other DLL’s with the CIN tool but can not seem to make this REFPROP DLL work.
On the first hand, is this possible... ?!
All these days I thought CLF nodes are meant to be used to call DLLs & CINs are meant to be used to call C code directly in LV.
Is the above thing possible too?
attached you find a program to use the refprop.dll in LabVIEW. Put the LV-RP.llb in your Refprop installation folder or copy the folders "fluids" and "mixtures2 as well as the "Refprop.dll" in a separate folder. Maybe there will be a problem with the decimal separators. Then you have to edit the “Read Mixture file komma.vi”. I included an instruction in the block diagram.
Unfortunately some of the calculated values are a little different from the values I get from RefProp (and from the Excel macro that comes with Refprop). Can anyone tell what is wrong?
Where abouts are you based. I did some work with refprop a couple of years ago with some C dlls.
What is it you are trying to achieve?