12/17/2022 0 Comments Bubble point pressure calculation![]() ![]() Z³ + (B-1)Z² + (A-3B² -2B)Z + (B³+B²-AB) = 0Ībove equation can be written as Z³ + C2.Z² + C1.Z + C0 = 0 Solving Cubic EquationĬubic equation is solved using following procedure. Where, kij's are Binary Interaction Parameter available from literature.įollowing cubic equation is solved to get Z L. Mixture parameters are calculated next aij = aji a = Σ iΣ j aij.Xi.Xj b = Σ i bi.Xi A = aP/(RT)² B = bP/RT Parameters for Peng Robinson EOS are calculated for each component i. Vapor mol fraction is estimated as following Yi = Ki Xi Ki = expįirst iteration starts with estimated P and Yi. Where Pc, Tc and ω are critical constants for a component i. P can be estimated as following - P = Σ Pi sat Xi Pi sat = exp These calculations can be performed in excel spreadsheet using Peng Robinson Equation of State (PR EOS).Įstimate pressure P and vapor mol fraction (Yi). ![]() Bubble P flash calculation determine bubble point pressure (P) and vapor mol fraction (Yi) for a mixture at given temperature (T) and liquid mol fraction (Xi). ![]()
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