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Home > Forums > Mechanical Engineers > Activities > Pipelines, Piping and Fluid Mechanics engineering Forum

 Equation for satured steam curve

thread378-48725
Helpful Member!CARF (Industrial)
10 Mar 03 5:57
Dear all,

If have this equation for saturated steam temperature as function of the steam pressure.

Tsat = 100*P^0.25

T [Celcius]
P [bar]

Results are reasonable but I need more accuracy.
Does anybody have a more accurate equation for me?

Thanks for helping!
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Helpful Member!joerd (Chemical)
10 Mar 03 7:07
You can download an Excel addin for free:
http://www.cheresources.com/iapwsif97.shtml

This has the 1997 steam table equations.

Regards,

Joerd
TD2K (Chemical)
10 Mar 03 9:12
Sorry, I don't have an equation but I've used the referenced above add-in and have been happy with it.  If you need a standalone equation, I'd develop a correlation in Excel.

I haven't used the correlation you shown but based on it's pretty basic coefficients, you should be able to get a better match pretty easy.
Helpful Member!CARF (Industrial)
10 Mar 03 11:07
Thanks,

Good links, all the equations can be found there as well !

: )
psafety (Specifier/Regul)
10 Mar 03 11:47
MVD,
Send me your email address.

Don Coffman
coffman.dm@pg.com
cymro (Mechanical)
4 Apr 03 7:43
MVD
I've put together a simple Excel spreadsheet based on tables in ENCYCLOPEDIA OF CHEMICAL PROCESSING & DESIGN written by JOHN McKETTA of University of Texas. The results look pretty good to me. If you want, post your email address.                    
Helpful Member!CARF (Industrial)
5 Apr 03 3:38
Hi Cymro,

Thanks for the offer, I already took the equations from IAPWS-IF97 and results look pretty accurate when compared with steam tables:

http://home.hccnet.nl/m.dijk/pressure_drop_calculator/calcs/calcs.html

Thanks for all the help 2 U all !

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