[Bug] Water vapour enthalpy calculation with CoolProp

[DanielGapes]

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Heating water and nitrogen under presssure using CoolProp property package

To Reproduce

PLEASE ATTACH THE ZIPPED FLOWSHEET FILE and/or inform the steps to reproduce the behavior:

1. In my case, I had 300kg/hr water, 77kg/hr Nitrogen as input to a flow stream
2. CoolProp property package
3. System pressure set to 90bar
4. Complete a sensitivity analysis, from 20 to 350Celcius

Expected behavior
A consistent change in vapour enthalpy, which is then used in the total system enthalpy

Observed behaviour has a nice consistent trend up to 200C, then a major discontinuity occurs.

Vapour mass flow is nice and consistent:

LIquid enthalpy shows consistent trend also:

Desktop (please complete the following information):

• OS: Windows 11
• 9.0.5
  Additional context
  Add any other context about the problem here.

[DanWBR]

@DanielGapes can you provide a sample flowsheet?

[DanielGapes]

Sure, attempting to attach here.
Simple flowsheet, just a single stream, and ran a sensitivity study over a temperature range, at a system pressure of 90bar

CoolPropsTestingDG.zip

. Reason for the flowrates chosen was due to some modelling of a process.

[DanWBR]

@DanielGapes I'm getting this in DWSIM 10. You have access to it, please try it and let me know if it works.

[DanielGapes]

Yes I tried this and got the same results as you showed. Excellent! Thankyou.
Out of interest, was there a known change from v9 to v10?