2 replies to this topic

[karmakian]

Hello,

I'm looking for an algorithm or computer code (C, Fortran, Pascal), for numerical VLE calculation. I have the EOS of fluid (R125) and need to obtaing the saturation curve using VLE. I know some softwares that calculate the
VLE for many substances but I realy need a code.
References is good too: articles, web pages, books.

thanks for help.

Karmakian Avanan

[Art Montemayor]

Karmakian:

If I interpret your request correctly, you are asking someone to give you the written, coded algorithm for programming your own specific Vapor-Liquid Equilibrium data (by incorporating your Equation of State. Before I can advise you on your request, allow me to ask a simple question: If you have need of the saturation curve for DuPont’s Suva refrigerant 125 (I presume that’s what you mean to say), why don’t you go to the following DuPont websites and download the Thermodynamic data as well as the Physical Properties?

http://www.dupont.co...thermoprop.html
http://www.dupont.co...l/physprop.html

If you don’t want to do that because you’ve been assigned to generate computer code to predict these values, then my recommendation to you is to do exactly that. You don’t actually believe that someone is going to do your work for you and then simply turn it over to you as a gift? – or do you?

This type of specific and engineering computer application takes a lot out of a person in the way of sacrifices, time, money, testing, and headaches. One person alone can’t do a decent job of it because one person doesn’t have the opportunity to dominate the two disciplines: Chemical Engineering and Computer Programming. Oh, a lot of engineers do their own programs; I write programs also – in FORTRAN and Visual Basic. But the problem is, I can’t compete at the real professional level and to reach that level would take giving up on engineering. The bottom line is that the logic, experience, know-how, and capability required of both these disciplines are taxed and anyone who has done it is not about to turn over their product to you – at least not for less than a handsome sum. So, in summarizing, the most practical solution is for you to write the code starting from scratch.

By the way, if you are not a proven and experienced expert in this field, who is going to have the confidence and assurance to apply your product algorithms and code to their engineering applications? Not many, I would bet. That’s why I believe you’ve left out one detail of information in your request: you are a student that has been assigned to write this code. Ergo, my recommendation: start writing.

Art Montemayor
Spring, TX

[gvdlans]

I can give you a reference:

Wayne C. Edmister and Byung Ik Lee: "Applied Hydrocarbon Thermodynamics", Gulf Publishing Company. See Editions Technip Webpage.