MEG-25% - Fluid not found in low-level interface

[nilspet...@googlemail.com]

I like to use an ethylene-glycol-water mixture for my calculations.

When I try to build a fluid-object through the low-level interface, I use the following syntax:

CP.AbstractState('HEOS','MEG-25%')

However, that throws the following error:

ValueError: key [INCOMP::MEG-25%] was not found in string_to_index_map in JSONFluidLibrary

I'm confused because:

PropsSI('H','T',300,'P',101325,'INCOMP::MEG-25%')

works totally fine. I tried to find out if there'S any difference in the naming convention or the syntax between low-level and high-level interface for binary mixtures but I couldn't find it, that's why I try to get help here.

I appreciate any help!

Best

Nils

[nilspet...@googlemail.com]

I'm sorry, I realized a c&p-error there. The error message is as following:

ValueError: key [MEG-25%] was not found in string_to_index_map in JSONFluidLibrary 

[Jorrit Wronski]

Please use the correct backend:

CP.AbstractState('INCOMP’,'MEG-25%')

And even better:

CP.AbstractState('INCOMP’,'MEG[0.25]')

 

 

 

 

Med venlig hilsen / Yours sincerely Jorrit Wronski Specialist Engineer, M.Sc., Ph.D.

DTU Science Park, Diplomvej 376, DK-2800 Kgs. Lyngby Phone: +45 45 16 04 10 / Dir. +45 45 16 04 26 / www.ipu.dk

IPU develops solutions for complex technology challenges, and we put research to work for your business. Our expertise includes: Product- and Process Technology Development Autonomous Systems and Robotics Advanced Materials and Surfaces Technology Thermodynamics and Energy Technology Physical Systems Modelling

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[nilspet...@googlemail.com]

Thank you for your quick reply, Jorrit!

I see the mistake I've done..

However, entering:

CP.AbstractState('INCOMP','MEG[0.25]')

delivers:

ValueError: key [MEG[0.25]] was not found in string_to_index_map in JSONIncompressibleLibrary

and the same happens for:

 CP.AbstractState('INCOMP','MEG-0.25%')

Do you have any suggestions?