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Hi. How can take the derivative or integral of a function involving coolprops? Thanks in advance. Alvaro.  DIFF_COOLPROP.sm (10kb) downloaded 35 time(s).
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Hello Alvaro, I have the impression that numerical derivative and integration issues (especially with units) will be here on the Forum for ever  . I wish I was wrong. The analytical attempts with Maple or Maxima will fail here. We are forced to use numerical solvers or functions here. Here is the solution (not straight forward though) only in SMath.  I tried Gradient.CD() from NumericalSolvers plugin, but I failed. Regards, Radovan |
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!" |
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If you like my plugins consider to support SMath Studio buying a plan; to offer me a coffee: paypal.me/dcprojects |
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on 28/01/2018(UTC), on 29/01/2018(UTC)
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Oh, thanks. I want to use coolprop and smath to show the basic thermodynamics equations, like  the dT dS relationships, etc. With nice notation (even have not partial derivatives) and, of course, units. Any way. Another question ... there are a standard way to plot with log scale? I can try to write my own function, but first want to know that. In the attached, a classical problem solved in less than two sheets, with the help of SMath. Best regards. Alvaro. Rankine Cycle with Reheat.sm (148kb) downloaded 52 time(s).
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Originally Posted by: Razonar  Oh, thanks. I want to use coolprop and smath to show the basic thermodynamics equations, Hello Alvaro, Physical water has two measurable properties [T,P]. Boiling drum operates @ saturation thus, measuring one gives the other one. Here, it seems you are working compressed water [single phase]. It has 15 WASP properties ... how you call either one @ mystic from CoolProp. Maybe, I don't understand the project. Jean Maths CoolProp_Props Copy.sm (404kb) downloaded 47 time(s).
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1 user thanked Jean Giraud for this useful post.
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No comment ... just learn that fluid speed in piping is no more m/s since century, rather Gy/K ... does is run faster/slower/fly out of pipe/spits out $$$ 
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Here what can I do, but guess that not much more, at least without an equivalent of wolfram's Hold or maple's x::uneval. I don't see any other way for handle the case with 2 variables, i.e. h(s,v), u(T,P) etc and have a true readable implementation of classic thermodynamics.  Best regards. Alvaro. CoolPropDiff.sm (39kb) downloaded 51 time(s).
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Originally Posted by: Jean Giraud
Maybe, I don't understand the project.
Jean
Hi Jean. Good to read you. The "project" is just write the classical thermodynamics formulas and check them numerically, like  Best regards. Alvaro.
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Thanks Alvaro, saved Very interesting stuff from http://www.katmarsoftware.com/From Katmar, I use lot Uconeer [Unit Converter] and WASP [Water & Steam Properties] ... 3 min free session, unlimited sessions. See you, cheers ... Jean
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These two turned red in 6179, quite puzzling. Are they red in your 6484 ? if YES => Oh ! 
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