EES was developed for thermo students so they took some care in it, it appears. I think you'll find the answers to your questions there (and I don't know the answers directly). You can access EES's online help without having the software: The printouts I've seen were always confusing. ![]() The stories I hear are that it was pretty terrible. I have very limited personal TK experience, but it was my company's default till about 15 years ago. I use mathcad because I'm more after the documentation, appearance, units and ability to use the larger toolbox. I'd add python as my next tool but haven't gotten there yet. Mathcad, matlab, EES, and Excel (since we can't really fully avoid it) should be enough. I think EES is worth having in the toolbox and not that expensive. Not that I think it has more bugs than mathcad. There's a new version almost weekly so I'm not sure of the quality checks that go into it so that may be a negative for some industries. So changes may happen, good or bad who knows? It's also a tool that evolved from a tool used to help students. Note, he's also retired and I've heard the plan is to sell f-chart at some point. He's very easy to contact and has made changes we've requested. But maybe it got better.ĮES is written by a professor of University of Wisconsin. We gave up on TK solver a long time ago in favor EES. But it doesn't have the polish of mathcad. For things like flow problems where you have to iteratively solve and then run 1000 cases of different parameters, it's hard to beat. That's good and bad: makes life simple but encourages bad programming etiquette. ![]() ![]() Has a mode to view equations in symbolic form for checking, but the default/editor mode is just text. It does units but does them rather clumsily we usually don't take advantage of that. However, the parametric tables are brilliant (are you listening PTC?). There are many rules about where you can put IFs, procedures, subroutines, etc. You can do a lot in EES, but it also has many limitations. It's iterative solver is fast and robust far superior to Prime. We have EES and for many things it is shockingly powerful. Tool choice always boils down to what you're trying to do.
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