Name | TDE.SRW-Peng-Robinson. EOS |
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Name | TDE.Schwartzentruber-Renon-Watanasiri-Peng-Robinson. EOS |
Comment | PR-EOS with Schwartzentruber-Renon-Watanasiri 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 φ | 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 + (1 - Tr1/2)×(m - Σφi×Tri - 1)]2, where the summation is over i = 1 to 3.
Tr = T/Tc Physical molar volume is obtained from the Peng-Robinson volume by adding VT.