[TRNSYS-users] REFPROP and TRNSYS

[Hal Gurgenci]

First of all, I thank QiChao Zhu, Edward Halawa, and Werner Keilholz for
their useful commentary on interfacing TRNSYS with C++.   I now have
TRNSYS happily running with Microsoft Visual Studio 2008.

 

I have a problem in interfacing it to REFPROP (Version 8.0).  I am
posting with the hope someone may have encountered this problem before;
or they may be able to shed some light regardless.

 

QUESTION #1: Has anyone created a TRNSYS component that is defined by a
MS Visual C++ DLL which itself queries the REFPROP.DLL?  If so, what MS
Visual Studio Version was it?  The REFPROP Manual says that their
example C++ files were tested with Microsoft VS 2003 edition.  I may try
to find a 2003 edition of the MS VS but then again this may not work
either because this could be a REFPROP-TRNSYS interface idiosnycracy.

 

QUESTION #2: Regardless of your answer to the above question, can you
comment on the following sequence of events?

 

*         I export my TRNSYS Component to C++ (Microsoft Visual Studio
2008) - No problem

*         I add the lines with REFPROP definitons and with the REFPROP
initialisation function (its name is SETUPdll). 

*         I reiterate that I have nothing about REFPROP except the call
to the SETUPdll function.

*         I compile and link and create the 'component.LIB' file --- No
problem

*         I run the TRNSYS Project.  Big Problem.  I get the following
TRNSYS error in a separate error box and the TRNSYS aborts the
calculation:

o    TRNEXE - Access violation at address 00000000.  Read of address
0000000.

 

Thank you.

 

 

PS: If you are interested, the free download of the MS Visual Studio
Express Edition 2005 did work with TRNSYS.  But it failed to compile the
REFPROP example C++ file because the VS Express Edition had no WINDOWS.H
file.  I think it was possible to download an Environment package (1.5
gigabytes) to provide that file among other things.  I switched to MS
Visual Studio 2008 because I found out that we had a site licens

 

 

 

H Gurgenci, +61 7 3365 3607,Rm:43-208,
http://www.uq.edu.au/geothermal/gurgenci-blog

 

From: David Bradley [mailto:bradley at tess-inc.com] 
Sent: Friday, 2 April 2010 7:04 AM
To: Hal Gurgenci
Cc: trnsys-users at cae.wisc.edu
Subject: Re: [TRNSYS-users] REFPROP and TRNSYS

 

Hal,
  There was a connection between TRNSYS 15 and REFPROP  although it was
never (to the best of my knowledge) part of the official package.  The
connection was built on the concept of Type61 (calling external DLLs )
and a piece of code called refprop.for. It also required a REFPROP
license (and the corresponding REFPROP.dll). I imagine that the
connection could probably be revived for TRNSYS 16. I notice on the NIST
website that you can purchase the REFPROP (Fortran) sourcecode so I am
not entirely sure what the advantage there is to the previous
implementation of calling the REFPROP DLL.
Kind regards,
 David


Hal Gurgenci wrote: 

I would like to use REFPROP to calculate the fluid properties while
using TRNSYS.  I understand this is possible but I could not find a
reference that tells me how.

 

Is there any place where I can find information on using REFPROP from
within TRNSYS? 

 

Professor H Gurgenci, +61 7 3365 3607,Building 43, Room 208

h.gurgenci at uq.edu.au  -o-  http://www.uq.edu.au/geothermal/gurgenci-blog


Director, Queensland Geothermal Energy Centre of Excellence,  

The University of Queensland, Brisbane

CRICOS
<https://exchange.uq.edu.au/exchweb/bin/redir.asp?URL=http://cricos.dest
.gov.au/>  Provider Code: 00025B

 

 


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