| Feature | DWSIM Community (Free) | DWSIM Pro (Paid) | |---------|------------------------|------------------| | Steady-state simulation | Yes | Yes | | Thermodynamic models | 20+ (open-source) | 50+ (including GERG-2008) | | CAPE-OPEN compliant | Yes | Yes | | Dynamic simulation | No | Yes | | Excel integration | Export only | Full bidirectional | | Capital cost estimation | No | Yes | | Technical support | Forums only | Email/Teams (48h response) | | Python code export | No | Yes | | Flowsheet size limit | None | None (same engine) | | Watermark on prints | No (open source) | No |
The takeaway: The Community Edition is excellent for education and simple research. But for industrial consulting, cost engineering, or dynamic safety analysis, you need DWSIM Pro.
The Community Edition relies on free models like Peng-Robinson and Soave-Redlich-Kwong. DWSIM Pro adds:
Without these, simulating CO2 capture, LNG liquefaction, or polymer processing is nearly impossible in academia alone. For industry, these models are non-negotiable. dwsim pro
While the classic DWSIM remains a powerful free tool, DWSIM Pro unlocks advanced capabilities essential for professional and large-scale projects:
As of 2025, DWSIM Pro is on version 8.3 (planned 9.0 for 2026). Key roadmap items include:
If these features materialize, DWSIM Pro could realistically become the first open-core simulator to challenge the incumbents in the mid-market ($1M–$50M capital projects). | Feature | DWSIM Community (Free) | DWSIM
DWSIM is a renowned open-source chemical process simulator. While the standard version is free and incredibly capable, DWSIM Pro represents the commercial, "enterprise" tier of the software.
DWSIM Pro is designed for engineers who require advanced thermodynamics, high-performance calculation engines, and professional support for mission-critical design and simulation work. It retains the user-friendly interface of the open-source version but supercharges the backend with exclusive features.
DWSIM Pro includes the DWSIM Economics add-on, which estimates: Without these, simulating CO2 capture, LNG liquefaction, or
This integration means you can size a distillation column, determine its cost, and run a profitability analysis without leaving the same software environment—something ASPEN charges an extra module for.
One of the most underrated features of DWSIM Pro is the COM/Excel interface. Unlike the community version’s limited copy-paste, the Pro version allows:
For engineering consultancies that live in Excel, this alone pays for the license.
We analyzed public case studies and user testimonials to build this profile: