Flowsheeting With COCO rev5
Slide 1
Flowsheeting with
COCO and
Nice Logo Please
Ross Taylor, Clarkson University Jasper van Baten, AmsterCHEM
Rev5 ? Apr 14 2010
Flowsheeting with COCO and ChemSep
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Slide 2
Outline
Introduction to COCO What is CAPE-OPEN? Setting up thermodynamic property packages with TEA Setting up flowsheets with COFE Using ChemSep in COFE Advanced flowsheeting features
This presentation will provide an overview how to use the combination of ChemSep and COCO for simulation of steady state chemical processes.
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Slide 3
Introduction to COCO:
Simulation environment (COFE) Thermodynamic property package (TEA) Collection of unit operations (COUSCOUS) Reaction package (CORN) ... and utilities
COCO is a collection of software components for setting up steady state chemical engineering flowsheet simulations. It consists out of 4 main components. The CAPE-OPEN flowsheeting engine is called COFE. The thermodynamic system is called TEA (Thermodynamics for Engineering Applications). The collection of unit operations that comes with COCO is called COUSCOUS. And then there is the CAPE-OPEN Reaction Numerics package: CORN. These are the 4 main components that will allow you to set up flowsheet calculations. The COCO distribution also includes the LITE version of ChemSep, and quite a few utilities. ChemSep will be discussed in detail later. The utilities are outside the scope of this presentation, but all are documented in the COCO online help.
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Slide 4
Flowsheeting engines
Dynamic
Steady state
Flowsheeting engines
Equation based
Modular
Sequential
Non-sequential
There are many steady state flowsheet engines available. Generally they can be divided into several categories. There are steady state flowsheeting engines versus dynamic flowsheeting engines. With dynamic flowsheeting engines the solution is time dependent. Here, we will focus on steady state simulations. Then there is the class of modular flowsheeting engines, versus equation based flowsheeting engines. For equation based flowsheets, the whole flowsheet (or independent sections thereof) translates to a set of equations that are solved simultaneously. In the modular approach, each sub-model in the process, e.g. a unit operation, is considered a black box, and recycles are solved by an iterative procedure. The modular flowsheeting engines can be divided in two more categories: sequential ones and non-sequential ones. COCO's flowsheeting engine COFE is a steady state sequential modular flowsheet system.
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Slide 5
Simulation environment process space
overall process model
pprroospmpurmribboeioeudtmdtaiealretolry-slydisnsesulusbb
mm3o3(ro3CdrddrdAOdpeOpemlPapPslaPsraEoErt(Ertdy-(CNtyOCNeysA)sAPl)ussPuEPbuEbNEb--)
((nu(nuonsuosenosenrenrCrCsCsAusAuAPbuPbPEbmEmE-m-Oo-OoOdPodPedPEeEleENslNslN)s))
Often a flowsheeting environment is built up hierarchically as shown here. The overall process model ? the flowsheet ? runs in the application space, shown here in green. The flowsheet will require thermodynamic sub-models and unit operation sub-models. Typically, most of those are provided by the application, and these also run in the application space, as shown on the left. Most flowsheeting engines will allow the user to add user-defined sub-models, for example unit operations. Usually there is a proprietary way to allow the user to enter these models. More often than not this is accomplished by compiling Fortran modules that are specific to the flowsheet at hand. These models are shown on the right. Then there is a third category of sub-models: those that are CAPE-OPEN compliant. The interfacing of a CAPE-OPEN compliant sub-model does not use the flowsheet engine's proprietary interface, and therefore typically can be run in a variety of flowsheet simulation packages. This class of models is shown in the center.
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