Creation of R245fa RGP File

FAKHREDDINE · April 11, 2016, 22:27

Dear researchers
Hope you are doing Well

I am currently doing research on the ORC Radial inflow turbine design, and my working fluid is R245fa

During the numerical investigation, I need to use more accurate thermodynamic model than the supplied one in CFX (Peng robinson and the others), and in order to avoid the time consuming numerical cost, it is recommended to use a Real Gas Property table (RGP) for the R245fa fluid.

Kindly, My questions are :

1. In the Super-heated Region tables, some values of our parameters F = (enthalpy + Speed of sound + .....) are repeated because the corresponding Pressure and Temperature fall out of the super-heated region (they are actually in the saturated one), if anyone have another opinion please share (see image from CFX ) tbl.jpg

2. the RGP file has a special format, and the parameters F = (enthalpy + speed of sound + ... ) should be organized in such a way that each table contain lines and columns, but after copying the parameters F from REFPROP to the RGP file format it is impossible to arrange it all with hands because there are 9 tables and (86*215) matrices each, if anyone can help with a VBA macro simple program I will highly appreciate that (see the required format in the image from CFX) tbl.jpg

Finally I hope we can share ideas and support each others
Hope to hear from you soon, dear researchers

turbo · April 12, 2016, 08:09

Ask your Ansys support to get the RGP file generator program.

FAKHREDDINE · April 14, 2016, 20:32

Hello Turbo
Thank you for answering me, Now I have another problem may be you can suggest
When I run the CFXsolver on the Cluster, I got an error message saying that CLUSTER could not read the RGP file, but when I run it on my desktop computer I got a result

I would like to know why the Cluster Platform could not read the RGP file and fail to solve the problem

Answering on the above would be highly appreciated

I hope to hear from you soon

xqy · May 17, 2016, 21:42

Hi, Fakhreddine,
I am writing the RGP file, but CFX failed to read it.
Could you please send the R245fa.rgp file or the generation file as a attachment here.
Thank you very much.

Quote:

Originally Posted by FAKHREDDINE

Hello Turbo
Thank you for answering me, Now I have another problem may be you can suggest
When I run the CFXsolver on the Cluster, I got an error message saying that CLUSTER could not read the RGP file, but when I run it on my desktop computer I got a result

I would like to know why the Cluster Platform could not read the RGP file and fail to solve the problem

Answering on the above would be highly appreciated

I hope to hear from you soon

FAKHREDDINE · May 18, 2016, 21:56

HI xqy
I Sent a private message asking for ur email
Check ur account messages box

S_teph_2000 · July 15, 2016, 06:23

Hello FAKHREDDINE,

Did you generate the RGP file using a script with the refprop data? if yes, could you please share the script?
Is it possible to get the R245fa.rgp file?

April 11, 2016, 22:27	Creation of R245fa RGP File	#1
FAKHREDDINE Member Yuva Join Date: Oct 2015 Location: Korea Rep of Posts: 33 Rep Power: 10	Dear researchers Hope you are doing Well I am currently doing research on the ORC Radial inflow turbine design, and my working fluid is R245fa During the numerical investigation, I need to use more accurate thermodynamic model than the supplied one in CFX (Peng robinson and the others), and in order to avoid the time consuming numerical cost, it is recommended to use a Real Gas Property table (RGP) for the R245fa fluid. Kindly, My questions are : 1. In the Super-heated Region tables, some values of our parameters F = (enthalpy + Speed of sound + .....) are repeated because the corresponding Pressure and Temperature fall out of the super-heated region (they are actually in the saturated one), if anyone have another opinion please share (see image from CFX ) tbl.jpg 2. the RGP file has a special format, and the parameters F = (enthalpy + speed of sound + ... ) should be organized in such a way that each table contain lines and columns, but after copying the parameters F from REFPROP to the RGP file format it is impossible to arrange it all with hands because there are 9 tables and (86*215) matrices each, if anyone can help with a VBA macro simple program I will highly appreciate that (see the required format in the image from CFX) tbl.jpg Finally I hope we can share ideas and support each others Hope to hear from you soon, dear researchers

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April 12, 2016, 08:09		#2
turbo Senior Member Join Date: Jun 2009 Posts: 174 Rep Power: 16	Ask your Ansys support to get the RGP file generator program.

April 14, 2016, 20:32		#3
FAKHREDDINE Member Yuva Join Date: Oct 2015 Location: Korea Rep of Posts: 33 Rep Power: 10	Hello Turbo Thank you for answering me, Now I have another problem may be you can suggest When I run the CFXsolver on the Cluster, I got an error message saying that CLUSTER could not read the RGP file, but when I run it on my desktop computer I got a result I would like to know why the Cluster Platform could not read the RGP file and fail to solve the problem Answering on the above would be highly appreciated I hope to hear from you soon

May 18, 2016, 21:56		#5
FAKHREDDINE Member Yuva Join Date: Oct 2015 Location: Korea Rep of Posts: 33 Rep Power: 10	HI xqy I Sent a private message asking for ur email Check ur account messages box

July 15, 2016, 06:23		#6
S_teph_2000 Member Ndong-Mefane Stephane Boris Join Date: Nov 2013 Location: Kawasaki (JAPAN) Posts: 53 Rep Power: 12	Hello FAKHREDDINE, Did you generate the RGP file using a script with the refprop data? if yes, could you please share the script? Is it possible to get the R245fa.rgp file?