Name | TDE.Mathias-Copeman-Peng-Robinson. EOS |
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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.