SRW Peng-Robinson Equation of State (with Volume Translation): DETAILS

Name TDE.SRW-Peng-Robinson. EOS
NameTDE.Schwartzentruber-Renon-Watanasiri-Peng-Robinson. EOS
CommentPR-EOS with Schwartzentruber-Renon-Watanasiri alpha function and constant-term volume translation
Variable VDNDensity
Variable TTemperature
Variable PPressure
Intermediate VMolar volume
Intermediate ZCompressibility factor
Parameter TCCritical temperature
Parameter PCCritical pressure
Parameter AFAcentric factor
Parameter φArray (1 to 3)
Parameter VTVolume 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.