# ProcessModelling — Process Simulation

> Process Simulation (iPhone/iPad app by ADG Energy Services Ltd.)

- Source: https://appshunter.io/ios/app/processmodelling/id6806282092 (this page in markdown: same URL + `.md`)
- Developer: [ADG Energy Services Ltd](https://appshunter.io/developer/6806282094)
- Category: Productivity, Utilities
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.6 · 4 MB
- Languages: American English
- Released: 2026-09-01
- Data updated: 2026-11-13

## What is ProcessModelling?

ProcessModelling is a professional steady-state process simulation tool for gas processing and pipeline engineering — built for macOS, iPad, and iPhone, so it goes with you into the field, not just to a desk.
Model complete flowsheets using industry-standard thermodynamics and a full set of common unit operations, then check results against your own hand calculations or a full-scale simulator.
KEY FEATURES
Peng-Robinson and Soave-Redlich-Kwong equations of state
Full unit operation set: Valve, Heater, Pump, Compressor, Expander, Mixer, Splitter, Pipe, Separator, Scrubber
Beggs & Brill multiphase pipe flow correlation for wet and multiphase pipelines
Recycle, with accelerated convergence, and adjust blocks for modelling flexibility
Component splitter for basic conditioning operations (eg. dehydration)
Automatically generated block diagrams of your model, with PDF export
A bundled example model and full in-app user manual to get started quickly
BUILT TO MAKE YOU THINK, NOT JUST CLICK
ProcessModelling isn't a drag-and-drop flowsheet editor. Every model is written as a clear, explicit deck — every stream, every piece of equipment, every condition, stated in your own words. That's a deliberate choice: it's easy to stitch blocks together by eye until something converges without ever really thinking through the process you're describing. Writing it down forces that thinking to happen.
An in-app keyword assistant helps you write decks quickly — inserting the correct shape of any block, with placeholders showing exactly what's expected — without ever guessing a value on your behalf.
Developed and cross-checked throughout against established process simulation practice.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Full Version | $19.99 | one-time |


## Is ProcessModelling safe?

Not enough ratings yet to assess ProcessModelling.

## Is ProcessModelling legit?

ProcessModelling has limited verification signals. The AppsHunter Legitimacy Score for ProcessModelling is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 5 releases)

### 1.4.1 — 2026-10-22

- Decks saved on Windows now open correctly.
- Phase envelopes are more robust near the critical point: some mixtures could previously show a false critical point.
- Quality lines now trace across a much wider range of gases and oils (10–98% vapour fraction), as one continuous curve to the critical point.
- The built-in user manual is updated to 1.4.1.

### 1.4.0 — 2026-10-16

Heat exchanger rating: TEMA arrangements
- Enter the exchanger's TEMA type (e.g. AES, BEM, AEU, AFL). E and F shells are rated; the heads are recorded and checked — U-tube bundles need an even number of tube passes, and a floating head with odd passes is flagged.
- Identical shells in series: area, UA and pressure drops scale with the number of shells, with the LMTD correction factor for that many shell passes.
- F shells (two-pass shell with longitudinal baffle), with pure counter-current flow and F = 1 when there are two tube passes. The longitudinal baffle is treated as sealed, and the result says so.
- Results now show the arrangement, the area of all shells, and the shell-side pressure drop in total and per shell pass.

Rating runs in the background
- Recalculate no longer holds up the app: a spinner and elapsed time show the rating is working, and you can carry on with other tabs meanwhile.

Block diagram export
- Save PDF now produces a sharp vector PDF with real, searchable text.
- New Save SVG: an editable diagram for vector-graphics editors, with every block and every stream as its own named group.

Other improvements
- Rating CSV exports keep every label and value in their own columns in spreadsheets.
- User manual updated for all of the above.

### 1.3.0 — 2026-10-07

Heat exchangers
• The Bell-Delaware rating now lives in the Calculations tab. The deck models the process with LMTD (DUTY= or UA=), so models run faster.
• Rating forms persist while you edit and re-run a model. Feed conditions follow the model unless you've changed them.
• New: Load geometry from CSV. Reopen a saved rating into any exchanger.
• Shell pressure drop is now split into crossflow, windows and end zones. Checked against Aspen EDR.
Physical properties
• New liquid density method (THERMO LIQDENSITY=): Spencer–Danner for hydrocarbons, tabulated data for water-rich liquids. Liquid water is no longer about 15% light.
• Better liquid thermal conductivity for condensates containing dissolved gas.
• Corrected molecular weight for Twu pseudo-components (aromatic and heavy cuts read high before).
• Missing binary interaction parameters: hydrocarbon pairs are now estimated, other pairs set to zero, and both are reported after each run.
Pipes and flash
• Detailed pipe heat transfer is more robust and accurate, and was checked against Aspen HYSYS.
• Single-phase streams no longer report as unconverged, and spurious near-empty liquid phases are eliminated.
Documentation
• User manual updated to 1.3.0, with method notes and validation results.

### 1.2.0 — 2026-09-25

New Calculations tab — run orifice plate sizing, rating, and flow calculations (ISO 5167-2 / Reader-Harris-Gallagher) live against any valve in your model, with meter-rangeability charting and CSV export.
PIPE blocks can now exchange heat with their surroundings — a simple fixed duty, or a full wall/insulation/ambient (air, buried soil, or submerged water) resistance-network model.
New in-app Component Database reference, always in sync with the bundled component and interaction-parameter files.
Various refinements and bug fixes.

### 1.1.3 — 2026-09-17

Improved phase envelope charts, a new quality lines feature. The app is now free to download, with a one-time purchase available to unlock unlimited model size.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-13.*