AI Process Simulator

AI Process Simulator is a steady-state chemical process simulator built in collaboration with Claude (Anthropic’s AI) using modern C++ (C++17) and Qt/QML. If you’ve used Aspen HYSYS, Aspen Plus or DWSIM it will feel familiar: you place equipment on a canvas, connect material streams, assign a fluid package and specify each block, and the solver finds the rest. Or you can describe the process in plain words. With Build with AI, Claude plans every stream and unit and shows you the plan, and when you press Build the flowsheet is drawn, connected and solved. Every number comes from the simulator’s own solver, never from the AI, and one Ctrl+Z takes the whole build back.

It covers the unit operations a process study needs:

• distillation columns, absorbers and strippers, with side draws, side strippers, pumparounds and tray-by-tray efficiencies. They solve the rigorous MESH equations with three engines (Inside-Out, Newton and Sum-Rates), and each column ranks the engines for itself. There is also a shortcut column.
• five reactor types (conversion, equilibrium, Gibbs, and kinetic PFR and CSTR)
• a liquid-liquid extractor, heat exchangers analysed zone by zone, heaters and coolers, pumps, compressors and expanders, valves, two-phase pipe segments, mixers, splitters, two- and three-phase separators and tanks
• recycles, Adjust and Spec logical blocks, and a scriptable Python unit for anything a built-in block doesn’t cover

The thermodynamics are industry standard: Peng-Robinson, SRK, PRSV, NRTL, UNIFAC and Ideal. It also has petroleum pseudo-component characterization, the full set of flash calculations, and a library of 362 compounds whose densities, vapour pressures and heat capacities were recently brought into line with published data. The flowsheet solves as you work, or on demand with Solve All, and recycle loops converge automatically. A built-in AI convergence advisor can work out why a column won’t converge and suggest how to fix it.

A section of plant can be wrapped in a sub-flowsheet: one block on the parent’s canvas with a complete flowsheet inside it, nested to any depth. A Navigator moves you through the case, and an Excel-style worksheet, datasheets and prints cover the whole plant. Cases import directly from Aspen HYSYS, DWSIM and COCO/COFE. Validate Import then compares every stream with the source simulator’s own results and says why any stream differs. One example is a published oil-and-gas separation benchmark of 55 streams and 41 unit operations: 39 of the 50 streams compared match DWSIM’s results within tolerance, none is significantly off, and the crude’s Reid vapour pressure comes out within 2% of DWSIM’s. A built-in validation report carries over 1,100 documented checks. It keeps hand-checkable answers, published reference data and comparisons with other simulators separate, and says plainly that nothing has yet been checked against measurements from real equipment. It runs on Windows and macOS, a dynamic simulation mode is in development, and the details and download are at therqon.ca.

For best results – Download using the Chrome Browser

Windows may show a “Windows protected your PC” screen because the app is newly published — click More info → Run anyway to install. The download also includes a samples directory with several .sim cases and DWSIM import cases to try.