AGA-8 , NX19, SGERG-88 calculation

[f.lombardi85]

Hi all, I'm new of coolprop sw and I'm trying to implement AGA-8, NX19, SGERG-88 calculation.

Do you have suggestions about?

Every ideas and/or suggestions are very appreciated. Thanks very much in advance.

[Ian Bell]

What is NX19?  

GERG-2008 is already implemented in CoolProp - that is pretty much what we use when we use the HEOS backend, except that we always use the most accurate pure fluid EOS, while GERG uses special pure fluid EOS.

Implementing AGA8 would be relatively easy, since the new version of AGA8 comes with C++ code (that I wrote :) )

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[f.lombardi85]

NX-19 is another type of calculus based on specific gravity method. Their input are specific gravity, carbone dioxide, nitrogen, temperature and pressure, density. The output of interest is compression factor Z.

About GERG 2008, I need to calculate the compressibility factor Z but I don't know in which way can I use GERG-2008 reducing library.

About the AGA-8 c++ code, could you please suggest me a reference about the code?

Excuse me but I'm new in this field.

thank you for your collaboration

Il giorno giovedì 29 settembre 2016 15:36:19 UTC+2, Ian Bell ha scritto:

What is NX19?  

GERG-2008 is already implemented in CoolProp - that is pretty much what we use when we use the HEOS backend, except that we always use the most accurate pure fluid EOS, while GERG uses special pure fluid EOS.

Implementing AGA8 would be relatively easy, since the new version of AGA8 comes with C++ code (that I wrote :) )

On Thu, Sep 29, 2016 at 4:19 AM, f.lombardi85 <f.lomb...@gmail.com> wrote:

Hi all, I'm new of coolprop sw and I'm trying to implement AGA-8, NX19, SGERG-88 calculation.

Do you have suggestions about?

Every ideas and/or suggestions are very appreciated. Thanks very much in advance.

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[Ian Bell]

I don't know if I can share the AGA8 code yet, but please email my work address (ian....@nist.gov) and I will inquire.  

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[f.lombardi85]

Can I consider the following espression as AGA-8 calculation?

PropsSI("Z";"T";280;"P";6000000;"HEOS::"MixtureString(...))

PropsSI allow me the calculus of Z in that way, is it correct? About function I mean.

thak you

have a nice day

[Ian Bell]

Yes, you have the right idea.  But the HEOS stands for the Helmholtz backend, which corresponds to the GERG model.  It is what is used in refprop too.

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[Miroslav Minchev]

https://goo.gl/xsxCie

NX19, SGERG-88 calculation