Adhemar ASPEN
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Transcript of Adhemar ASPEN
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Heat and Power Technology, Stockholm, Sweden
ASPEN ENGINEERING SUITEOVERVIEW
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Heat and Power Technology, Stockholm, Sweden
Software for integrated process engineering, including steady-stateand dynamic process simulation, equipment design, and costevaluation.
General Overview
Source: Aspen Technology, 2012
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Heat and Power Technology, Stockholm, Sweden
Aspen Plus Aspen Plus is a process modeling tool for conceptual design,
optimization, and performance monitoring for diverse industries.Aspen Plus is a core element of AspenTechs Process Engineeringapplications.
Given thermodynamic data, realistic operating conditions, andrigorous equipment models Its possible to simulate actual plantbehaviors, by using basic engineering relations such as mass
and energy balances, and phase and chemical equilibrium Features Best-in-class physical properties methods and dataDiverse Model library : Simulation of a wide range of processesScalability for large and complex processesOnline deployment of models: real-time optimization/advancedprocess control applicationsWorkflow automation: Aspen Plus models can be linked to MicrosoftExcel using Aspen Simulation Workbook or Visual Basic
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Aspen Plus
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Heat and Power Technology, Stockholm, Sweden
Example
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Define Process Flow SheetCoal Drying Flowsheet
WET-COAL
NITROGEN
DRY-REAC
IN-DRIER
DRY-FLSH
EXHAUST
DRY-COAL
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Specify Chemical Components
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Specify Thermodynamic Model
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Specify Flow Rates conditions
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Simulation Results
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Heat and Power Technology, Stockholm, Sweden
ASPEN CUSTOM MODELER
OVERVIEW
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Heat and Power Technology, Stockholm, Sweden
FeaturesDesigned for process engineers : ACM uses a flow
sheeting environment based on streams and equipment
and includes built-in understanding of components andprocess thermodynamics.
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Heat and Power Technology, Stockholm, Sweden
FeaturesEquation oriented architecture : ACM language isdeclarative , you say what you want and leave it to ACM
to find out how .- Solver for system of Algebraic Equations , based on Newton
iterative procedure
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Heat and Power Technology, Stockholm, Sweden
Features- System of differential and algebraic equations
Integration Algorithms- Implicit: Implicit Euler (fixed or variable step), gear- Explicit: Explicit Euler, Runge Kutta
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Heat and Power Technology, Stockholm, Sweden
Features Optimization and estimation tools enabling
parameter fitting, data reconciliation, and steady-state
and dynamic process optimization.
Estimation example
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FeaturesOptimization example
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Heat and Power Technology, Stockholm, Sweden
Features
Flexible Task Language to define batch recipes,
transition schemes, or to simulate process equipmentfailures or other disturbances
Heating System example:
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Features Export Equipments or process models
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Model Example
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Department of Energy Technology
Stirling Engine Adiabatic Model + Losses
Assumptions
-Adiabatic expansion and compressionspaces
- Sinusoidal volume variations
-Ideal gas inside the engine
- Heat Losses
-Friction and Pressure drop losses
- Non ideal Regenerator
- Heat transfer model from the externalsource to the engine included.
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Heat and Power Technology, Stockholm, Sweden
Heater
Regenerator
Cooler
StirlingS7
S8
S9
Ideal Adiabatic LossesSolution Aspen- C++
Pressure Losses
Internal Conducction HeatExchangers
Regenerator Losses
Shuttle Effect Losses
)(1 dQridQ
JLd TcTd kpDd z
dQ )(4.0 2
2
.
2
Ad V m fr
P
PmdQ
T LkA
dQ
+
Ths(source)Tks(source)
Tho(heater)Tko(cooler)
Teo=ThoTco= Tko
Solve DifferentialEquations
Calculate Tc, Te
After 360(cycle)
If TcTcoTeTeo
Tco=TcTeo=Te
Qheater Q cooler
Qloss
Th=Ths-Qhs/UATk=Tks-Qks/UA
If ThThoTkTko
Tho=ThTko=Tk
Qheater Q cooler
Qloss
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Heat and Power Technology, Stockholm, Sweden
THANKS