INDISS Simulation Platform

• Structure of INDISS
• Computation principle
• CAPE-OPEN standard

Structure of INDISS™

• is a High Fidelity Dynamic Simulation Platform that provides the user with a wide set of process components and libraries, built on First Engineering Principles and originally designed as dynamic models. INDISS™ encompasses the Microsoft™ Windows tools and Object Oriented flow sheeting capability. INDISS™ is user-friendly working environment; the modular approach allows easy upgrades and extension.
• was the first simulation environment of its kind released in 1996. Since that date, INDISS™ has become a standard of quality and robustness that provides a simulation environment capable of successfully supporting all kinds of harsh transient process conditions, cold and warm start up, normal shut down, emergency shut down, partial shut down, and restart after a complete or partial shutdown.
• uses powerful computing algorithms to ensure convergence and acceleration. INDISS™ is able to treat big networks by using sparse matrix techniques. The network solver has a restrictive stopping criterion, thus the network computation is performed with a great accuracy.
• uses a global resolution for pressures and flow rates and a modular-sequential approach of the dynamic simulation.
• includes in the same environment the graphic editor, allowing to create and/or replicate DCS Human Machine Interfaces (HMI).

Computation principle

The modular-sequential method means that several sequential calculation stages are performed during one time step. One calculation stage focuses on hydraulic network and material balance computation while other calculations stages address heat balances and rigorous thermodynamic calculations. During the hydraulic network solving stage, physical properties of material are represented using simplified expressions. At the end of each time step, INDISS™ provides the user with a full consistent dynamic heat and mass balanced state of the process. Physical property computation used is compatible with high level standard thermodynamic models implemented in steady-state simulators.

INDISS™ has been designed in a multi-layer component architecture. This open environment ensures easy integration of third-party proprietary components such as thermodynamic packages or chemical reactor models. Seamless communication with most standard PC tools is possible using OLE or OPC.

CAPE-OPEN standard

INDISS™ is compliant with CAPE-OPEN standard. RSI SIMCON is an associate member as provider of CAPE software. CO-LaN Special Interest Group Units are the working groups in charge of the maintenance, evolution, and extension of the CAPE-OPEN Standards. RSI SIMCON is a CO-LaN approved consultant.