PT Flash Calculation

Description

Performs rigorous PT flash calculation for a ternary mixture (ethane, propane, n-pentane) using the property-array workflow:

  1. Build property table using Component.Props (spills Tc, Pc, omega, Mw)
  2. Run Flash with (T, P, zi, props, output) signature
  3. Retrieve vapor fraction, liquid/vapor compositions, and K-values

The Flash output arrays (x, y) can feed directly into subsequent calculations as composition inputs.

Conditions: 320 K, 0.8 MPa - two-phase region for this mixture.

Spreadsheet Preview

32 rows x 6 columns

Required Functions

PO.EoS.Component.Props

Returns component properties [Tc, Pc, omega, Mw] as a row array from the database. Spills horizontally into 4 cells.

PO.EoS.Flash.PR

PT Flash calculation using Peng-Robinson EoS. Returns V (vapor fraction), L (liquid fraction), x (liquid composition), y (vapor composition), or K (K-values) based on output parameter.

How to use this blueprint
  1. In Excel, go to the Petroleum Office ribbon tab and click Blueprint Manager
  2. Search for PT Flash Calculation
  3. Click on the blueprint to preview the spreadsheet template
  4. Click Insert to place it into your worksheet. Modify the input values to match your data.

Related Theory

C7+ Characterization

Methods for estimating critical properties, splitting heavy fractions, and lumping components for equation of state modeling

Compositional Viscosity Models

Viscosity prediction methods for compositional EoS modeling including Lee-Gonzalez-Eakin, Lorentz-Bray-Clark, and Pedersen models

Peng-Robinson Equation of State

Theory and equations for the Peng-Robinson cubic equation of state including mixing rules, alpha functions, and volume translation

Flash Calculations

Theory and methods for PT flash calculations, Rachford-Rice equation, stability analysis, and K-value estimation

Related Blueprints

Separator Test

Demonstrates array composability by chaining Flash calculations in a two-stage separator:

Component Database

Browse all available components and their thermodynamic properties.

Phase Envelope

Generates a phase envelope (P-T diagram boundaries) for a natural gas mixture using Peng-Robinson EoS. Returns:

Binary Interaction Parameters

Estimates binary interaction parameters using available correlations:

Fluid Model Setup

Build a fluid property table combining database components, SCN (Single Carbon Number) pseudo-components, and mixture molecular weight. This is the foundational step for all EoS calculations.

Bubble & Dew Point

Calculates bubble point and dew point (pressure and temperature) for a ternary hydrocarbon mixture using Peng-Robinson EoS.

Tags:
eosflashvletwo-phaseequilibriumphase-split

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