1. DIP_simu_01.ppt Introduction Tutor mode
Chemical process simulator structure

2. EXAMPLE:
A stream with a molar flow of 200 kmol/h of air at 20ºC and 1 bar is compressed to 5 bar in a single-stage positive displacement compressor.
AIR
20ºC
1 bar
5 bar
COMPRESSOR

3. How do you calculate the condition of the compressed stream?
AIR
20ºC
1 bar
5 bar
COMPRESSOR
How do you calculate the condition of the compressed stream?
Inlet stream enthalpy.
Enthalpy increase in the compressor:
Polytropic efficiency.
Inlet and outlet pressure condition.
Outlet stream enthalpy
Outlet stream condition

4. How do I simulate this process? (Tutor mode)
Process flow diagram.
Components (AIR).
Thermodynamic model (Peng-Robinson EOS)
Inlet stream definition : 20ºC, 1 bar, 200 kmol/h.
Compressor characterization : positive displacement, Pout= 5 bar

5. Example simulation (Tutor Mode) [F4]
1) Process flow diagram (PFD):
2) Setup
Global/Title: Air compression
Description: A stream with a molar flow of 200 kmol/h of air at 20 º C and 1 bar is compressed to 5 bar in a single-stage positive displacement compressor.
3) Components
ID: AIR
Name: AIR
4) Properties
Check all available Base-method: Process Type = ALL.
Process Type: GASPROC
Base-Method: PENG-ROB
5) Stream S1
20ºC, 1 bar, 200 kmol/h of AIR
6) Block B1
Positive displacement, Discharge pressure: 5 bar
7) RUN
8) Results
See PFD
Stream S1 results (Select / Right-click / Results)
Stream S2 results (select in the browser)
Select stream S1 in a new column to compare results.
Block B1 results.

6. Main window ELEMENTS Titlebar Menu bar Toolbars: Right-click
Process Flowsheet window
Model library [F10]:
Select Mode button
Streams
Blocks
Many: click
One: drag&drop
Status bar
DISPLAY MODE (/Window)
Normal
Workbook
Flowsheet as Wallpaper
1) Draw the PFD of the example.
2) NEXT → PFD complete. Continue? → OK

7. Forms TITLEBAR BROWSER Status symbol. TOOLBAR Upper level
Show/Hide data browser
Units
Back/Forward (history)
Previous (<<) Next (>>) Form
All/Input/Results
Comments
Status
Next
SHEETS
Input and Result values.
Text and number fields, drop down menus, radio buttons, ...
Context-sensitive help status line.
Other sheets: Object Manager

8. Results ...
DIP04_00.apw

9. Stream S1 results (Select / Right-click / Results)
Stream S2 results (select in the browser)
Select stream S1 in a new column to compare results.
Block B1 results (Select / Right-click / Results)

10. CHEMICAL PLANT SIMULATION SOFTWARE: GENERAL STRUCTURE
Commercial software:
FLOWTRAN, PROCESS, DESIGN 2000, ASPEN, ChemCAD, HYSIM, SPEEDUP,...
Simulation software objective:
Determine the topology, flow and operating conditions that lead to an optimal design of the process.
Maximize profit.
Minimize energy consumption and raw materials.
Minimize waste.

11. REACTION (equilibrium, kinetics,...)
SIMULATION SOFTWARE STRUCTURE
PROBLEM DEFINITION
PFD
Flows
Conditions (P, T, V,...)
Specifications (reflux ratio,...)
PHASE
EQUILIBRIUM
REACTION (equilibrium, kinetics,...)
PROPIEDADES FISICAS
MAS & ENERGY
BALANCES
BLOCK
OPERATION
PHYSICAL PROPERTIES
EQUIPMENT DESIGN
COST EVALUATION
RESULTS

12. SIMULATION SOFTWARE ROUTINES:
 General management routine.
Physical properties database.
Thermodynamic and transport properties calculation package.
Operating blocks routines.
User Interface.
Other: optimization, sensitivity analysis, dynamic simulation, properties correlation, ...

13. PHYSICAL PROPERTIES DATABANK
The PURE20 databank contains parameters for 1,898 (mostly organic) components. The databank is based on the data developed by the AIChE DIPPR® data compilation project.
The parameters stored in the databank can be categorized as:.
· Universal constants, such as critical temperature, and critical pressure
· Temperature and property of transition, such as boiling point and triple point
· Reference state properties, such as enthalpy and Gibbs free energy of formation
· Coefficients for temperature-dependent thermodynamic properties, such as liquid vapor pressure
· Coefficients for temperature-dependent transport properties, such as liquid viscosity
· Safety properties, such as flash point and flammability limits
· Functional group information for all UNIFAC models
· Parameters for RKS and PR equations of state
· Petroleum-related properties, such as API gravity, octane numbers, aromatic content, ...
· Other model-specific parameters, such as the Rackett and UNIQUAC parameters
Other databanks: INORGANIC (2,477 components), AQUEOUS (1,676 ionic species), COMBUST (59 components typically found in combustion products, including free radicals),...

16. THERMODYNAMIC AND TRANSPORT PROPERTIES CALCULATION MODELS

17. UNIT OPERATION MODELS

18. Help Menus: Context-sensitive status line. Forms:
F1 (/B1/Results: Volumetric Efficiency, Select, F1)
Expert system (NEXT):
Completing input specifications (Tutor mode)
Tells you when your specifications are inconsistent or incomplete.
If the field where you want to enter data is inactive, the Prompt for the field tells you why.
Tells you which are the missing values in incomplete forms.
Windows conventional help:
Menu: /Help/Help Topics
Menu: /Help/What’s this
Manuals:
Inicio /Todos los Programas /AspenTech /aspenONE V7.1 Documentation /Aspen Engineering V7_1 /Aspen Plus
AspenPlusProcModelV7_1-Start.pdf
AspenPhysPropMethodsV7_1-Ref.pdf
AspenPhysPropModelsV7_1-Ref.pdf

19. COST (€/h) = A WkW + B Nºunits €/kW-h (Capital + Operating costs)
Another example (DIP04_01)
800 kg/h
Acetone (20%mol) + N2
20ºC, 1 bar
200ºC, 16 bar
Utilities: Cooling water at 30ºC and saturated steam at 220ºC (ΔTmin= 10ºC)
Unit operations: heaters and isentropic compressors (GPSA).
COST (€/h) = A WkW + B Nºunits
€/kW-h (Capital + Operating costs)
Compressor
Heating
Cooling A
0.18
0.052
0.011 B
0.03
0.010

20. First case (DIP04_01A):
1) Compress to 16 bar
2) Heat up to 200ºC

21. Condensation in stream 3 !!
Second case (DIP04_01B):
1) Compress to 4 bar
2) Cool down to 40ºC
3) Compress to 16 bar
4) Heat up to 200ºC
Condensation in stream 3 !!

23. Another example (DIP04_02)
Flash operation
A stream of 100 kmol/h of benzene and toluene, 50% by weight, at 20ºC and 1 atm, is compressed with a pump up to 3 atm and then heated in a heat exchanger up to 135ºC. The mixture is finally expanded to 1 atm into a flash vessel, where one vapor and one liquid streams are obtained.

24. 100 kmol/h
benzene
toluene (50%w)
20ºC
1 atm
1 atm
3 atm
135ºC

26. Applications and Examples
Applications: Files showing several several options. Real examples with comments.
Examples: example files used in the getting started manuals.
Open / More Files / ‘Favorites’
Examples
Applications