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This repository has been archived by the owner on Dec 14, 2017. It is now read-only.
Thank you for the CoolProp software it is fantastic. I have been using for several months but I have found an issue. I have checked in Python and Matlab and encountered the same problem:
T = Props('T','S',1.8244,'H',470.04,'R245fa')
Gives:
Error using Props
CoolProp Error: CoolProp error: Invalid values for inputs p=0.0103819 h=470040 for fluid R245fa
Whilst NIST gives T as 354.89 K.
I am at a loss as I cannot understand where the issue is coming from. I am also getting similar discrepancies when comparing data to NIST whilst not actually generating any errors.
Many Thanks
Mark
The text was updated successfully, but these errors were encountered:
Interesting. At first I thought it was an issue of reference states, but
its seems REFPROP and CoolProp use the same reference state for enthalpy
and entropy. Seems like a bug in CoolProp. Where is this state point?
Liquid, vapor, two-phase, close to critical point, etc?
Thank you for the CoolProp software it is fantastic. I have been using for
several months but I have found an issue. I have checked in Python and
Matlab and encountered the same problem:
T = Props('T','S',1.8244,'H',470.04,'R245fa')
Gives:
Error using Props
CoolProp Error: CoolProp error: Invalid values for inputs p=0.0103819
h=470040 for fluid R245fa
Whilst NIST gives T as 354.89 K.
I am at a loss as I cannot understand where the issue is coming from. I am
also getting similar discrepancies when comparing data to NIST whilst not
actually generating any errors.
Many Thanks
Mark
—
Reply to this email directly or view it on GitHub #221.
Thanks for quick reply. This point is a superheated vapour quite close to the saturation line but i have run the same set of equations starting at a closer point to the sat line without problem. I had a similar issue whilst building a lookup table array that I use to implement Coolprop into Simulink, here the calls to Props are all using TP as input.
I have rolled back to a previous version of CoolProp and the results are fine. No errors are generated and the results are with acceptable tolerance to Refprop.
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Dear Ian
Thank you for the CoolProp software it is fantastic. I have been using for several months but I have found an issue. I have checked in Python and Matlab and encountered the same problem:
T = Props('T','S',1.8244,'H',470.04,'R245fa')
Gives:
Error using Props
CoolProp Error: CoolProp error: Invalid values for inputs p=0.0103819 h=470040 for fluid R245fa
Whilst NIST gives T as 354.89 K.
I am at a loss as I cannot understand where the issue is coming from. I am also getting similar discrepancies when comparing data to NIST whilst not actually generating any errors.
Many Thanks
Mark
The text was updated successfully, but these errors were encountered: