INDISS Licenses
Libraries of Unit Operations
INDISS is a Real Time High Fidelity simulation platform that integrates in one single environment all the tools needed to build a dynamic simulator:
- Model diagram flow sheeting capabilities
- Unit Operations library
- Computed rigorous thermodynamic & physical properties package
- Network solvers
- Instrumentation & Control libraries
- Logic and ESD
- Graphic displays
- Trends
INDISS™ comes with a large selection of Unit Operations classified into specific libraries to address particular process needs such as Oil & Gas, Refining, Chemicals, Petrochemicals, Power Generation, etc.
Examples of specific libraries:
- Platform & Basic simulation environment
- HP thermodynamics
- Chemical engineering
- FCC Reactor and catalyst regeneration
- Catalytic reforming and catalyst regeneration
- Amines
- Aromatics C8 isomerization
- BTX extraction
- Delayed Coker
- Claus process
- HDT / Hydrocraking
- Power generation
- Waste to energy
- Multiphase pump
- Pipe line dynamic model
INDISS™ is an Open Environment designed to CAPE standards.
INDISS Licenses
Three versions of INDISS™ License are available:
- INDISS™ Developer License: This license provides full access to all INDISS™ features allowing users to modify existing models or to implement new models.
- INDISS™ Maintenance License: specific access to the delivered application.
- INDISS™ Run Time License: is used to operate an existing simulator.
Use of solvers within INDISS™
Several kinds of solver are used within INDISS™.
Algebraic solvers, based on Newton algorithm, are used for hydraulic computations, for some thermodynamic calculations as well as in some unit operations in steady state mode or when the dynamics is not that quick (heat exchanger, furnace, dynamic slug simulator, etc.).
The differential solvers are used in dynamic mode on unit operations whose dynamics is high (typically the reactors). Several algorithms (Runge Kutta-Cash Karp, semi-implicit Bulirsh Stoer, Gear backward difference formulae and Adams predictor corrector methods) are available and are used according to the stiffness of the equation systems.
In order to determine the solution corresponding to the global minimum of free enthalpy, several dedicated solvers are implemented (tangent plan method, substitution method, etc.).
Large systems are solved by solvers using sparse matrix techniques to minimize the computing time.
As far as possible, and specifically for the hydraulic networks, the derivatives of material balance equations of the unit operation are analytically calculated and then composed (chain rule) thus ensuring a high robustness.