Aspen Dynamics®

Dynamic simulation and optimization of chemical processes

Aspen Dynamics extends Aspen Plus steady-state models into dynamic process models, enabling design and verification of process control schemes, safety studies, relief valve sizing, failure analysis, and development of startup, shutdown, rate-change, and grade transition policies. Aspen Dynamics is a core element of AspenTech’s aspenONE™ Process Engineering applications.

Features

  • Easy conversion of steady-state Aspen Plus® models into dynamic models; common look and feel with Aspen Plus and Aspen Custom Modeler®.
  • Optional custom modeling using Aspen Custom Modeler, enabling modification of standard unit operations in the Aspen Dynamics model library.
  • Best-in-class physical properties methods and data. Aspen Dynamics is fully integrated with Aspen Properties®; it includes extensive databases of pure component and phase equilibrium data for chemicals, electrolytes, solids, and polymers and links to the electrolyte data package sold by OLI Systems.
  • Optimization and estimation tools enabling parameter fitting, data reconciliation, and steady-state and dynamic process optimization.
  • Equation-oriented architecture allowing timely and robust simulation of complex, highly integrated processes.
  • Flexible Task Language to define transition schemes or to simulate process equipment failures or other disturbances.
  • Library of equipment including rigorous reactive distillation models with hydraulics and a full set of pressure relief models.
  • Library of control models to simulate process control systems, including links to Aspen DMCPlus® control models.
  • Option of flow-driven or pressure-driven simulation enables the user to optimize the model for performance or rigor.

Options

  • Aspen Model Runner™ is an execution environment which can be used to run process models exported from Aspen Dynamics. Use Aspen Model Runner to protect intellectual property inside the models and to reduce deployment costs.
  • Aspen Polymers Plus® extends Aspen Dynamics with a complete set of polymer thermodynamics methods and data, polymerization reaction models, and extensions to the equipment models to track polymer properties.
  • Aspen Simulation Workbook™ enables easy development of Excel®-based user interfaces to Aspen Dynamics or Aspen Model Runner, allowing broad deployment to casual users in the field.

Benefits

Aspen Plus is a proven, industry-standard solution with over ten years of use in the field. Customers have recognized and reported:

  • $15 million saved through improved start-up procedures
  • $10 million saved capital cost by avoiding over-design of relief systems
  • 15% capacity increase in a sold-out plant through improved operability
  • Improved process safety through better operational procedures, improved control system design, and proper relief-valve sizing
  • Better design decisions through detailed analysis of the trade-offs between process operability and process integration

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