Mathias-Copeman Peng-Robinson Equation of State (with Volume Translation): DETAILS
| Name | TDE.Mathias-Copeman-Peng-Robinson. EOS |
|---|---|
| Comment | PR-EOS with Mathias-Copeman alpha function and constant-term volume translation |
| Variable VDN | Density |
| Variable T | Temperature |
| Variable P | Pressure |
| Intermediate V | Molar volume |
| Intermediate Z | Compressibility factor |
| Parameter TC | Critical temperature |
| Parameter PC | Critical pressure |
| Parameter AF | Acentric factor |
| Parameter c | Array (1 to 3) |
| Parameter VT | Volume translation |
Z = p ×V/(R ×T) Z = V/(V - b) - {a×α(T)×V}/{(R ×T)×(V2 + 2×b×V - b2)}
a = (0.45724×(R ×Tc)2)/pc
b = (0.0778×R ×Tc)/pc
α(T) = [1 + Σci ×(1 - Tr1/2)i]2 where the summation is over i = 1 to 3.
Tr = T/Tc
The physical molar volume is obtained from the Peng-Robinson volume by adding VT.