Unlike general programming languages, EES solves systems of equations implicitly, handles units, and has built-in property tables for water, refrigerants, ideal gases, and real fluids.
If your system is highly non-linear, use the Variable Information window to provide a "guess" value to help the solver converge. If you'd like to dive deeper, I can help you: Engineering Equation Solver EES Cengel Thermo Iso
In a typical Çengel problem, you might need to find the work done during the isothermal expansion of an ideal gas. In EES, your code would look like this: Unlike general programming languages, EES solves systems of
s1 = entropy(Fluid$, P=P1, T=T1) h1 = enthalpy(Fluid$, P=P1, T=T1) In EES, your code would look like this:
Write one line: s_1 = entropy(Steam, P=P1, T=T1) and another: s_2 = entropy(Steam, P=P2, x=x) and set s_1 = s_2 . EES solves it in 0.2 seconds.
P1 = 3 [MPa] T1 = 400 [C] P2 = 50 [kPa] Fluid$ = 'Steam'