Phase Envelope

Description

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

  • Bubble curve (T, P arrays): boundary where liquid begins to vaporize
  • Dew curve (T, P arrays): boundary where vapor begins to condense
  • Special points: cricondenbar (max P), cricondentherm (max T), critical point

The array outputs (bubble_T, bubble_P, etc.) can be used directly for charting in Excel.

Spreadsheet Preview

21 rows x 6 columns

Required Functions

PO.EoS.Envelope.PR PO.EoS.Component.Props

Blueprint ID

po.eos.phase.envelope
Tags:
eosphase-envelopecricondenbarcricondenthermcritical-point

Related Blueprints

Binary Interaction Parameters

Estimates binary interaction parameters using available correlations:

Bubble & Dew Point

Calculates bubble point and dew point (pressure and temperature) for a ternary hydrocarbon mixture using Peng-Robinson EoS. - **Bubble point**: first vapor bubble forms from liquid (V = 0) - **Dew point**: first liquid droplet forms from vapor (V = 1) Uses the property-array workflow: build property table, then pass `zi` and `props` to saturation functions.

Component Database

Browse all available components and their thermodynamic properties.

EoS Tuning Setup

Framework for EoS tuning by comparing calculated vs. observed bubble point pressures. The property table uses editable cells for Tc, Pc, omega, and Mw, enabling manual adjustment or Solver-based regression.

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.

PT Flash Calculation

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

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