module 1 - introduction to aspen hysys
TRANSCRIPT
Supported by:
Aspen HYSYS Training
Module 1: What is Aspen HYSYS?
Tutor:
M. Ersharry Yunashtanto
Zayyanatun Zulfa
Ikha Muliawati
Mada Harahap
+
Use of a computer program to quantitatively model the characteristic equation of a process in term of material and energy stream.
Simulation
Given
Process Model
Predict Products
• Process Design/Analysis
• Optimization
• Equipment Sizing, Costing
Known Feeds
Principle
Right sequence? Reactor type?
Catalyst?
Chemistry?
Number of trays?, Feed Stage?
T, P?
Reflux? P? Recycle flowrate?
Steam Rate ? CW rate?
Purity?
Example of process model
Principle 2
Steady-State Modeling: Input – Output = 0
Dynamic Modeling: Input – Output = Accumulation
F
FV
FL
Simulation Taken Time or Number of Iteration
0
Solution Space
F(x)=0
F(x) x
xi
xs
Time 0
x
)(/ LV FFFdtdV
LV FFF
F FV
FL
PC
LC FC
•Design •Operation •Optimization
•Design Verification •Operation Analysis •Control Strategy •Operator Training
Model
• Interactive Simulation (Automatic Calculation)
• Automatic detection of Degree of Freedom
• Automatic stream Flash calculation
• Full Microsoft Windows Program (click, cut and paste, object,,,)
• Bi-directional calculation (non-sequential)
• Easy to learn & use
• Fast solver (speed)
• Extensibility
• No Input text file (think about MS Excel)
• Fully integrated Steady and Dynamic simulation
HYSYS Uniqueness
Degree of Freedom: the number of independent parameters that define its configuration DOF = No of variables – No of equations Yes, because it has unique solutions. DOF = 2 – 2 = 0
5x + 3y = 75 10x + 6y = 150
Degree of Freedom
DOF in Process Balance = No. of unknown variables + No. of reactions – No of independent material balances – No. of other relationships From above case, we can create 3 material balance (oxygen, nitrogen, and total). However they all will not be independent. You will need one other relationship. Let’s say you have created total and oxygen balance (2 equation), then one (1) other relationship equation will be Then, DOF = 3 + 0 – 2 – 1 = 0 (solved)
yN2 = 1 – yO2
Degree of Freedom (2)
• Independent Variables
− Intensive variables(x,T,P,V,H,S) : Strength, Quality, Shape
− Extensive variables (F,Q,delta P) : Size, Quantity
• To define Stream completely − Chemical Components
− State
− Temperature
− Pressure
− V/F (Vapor Fraction) ?
− Quantity
− Flowrate
• To define Process Unit − All Units: Pressure Drop
− Heater/Cooler, Pump, Compressor: Q(Duty)
− Heat Exchanger, Distillation Column: more specifications
DOF Specification
User Input User Specified
BLUE Variable in HYSYS
Density ? Viscosity ? Cp, Cv, Cp/Cv ? Enthalpy ? Thermal Conductivity ? MW ? K-value ? etc....
Degree of Freedom (3)
Have you installed hysys with appropriate version?? It is more difficult to open newer version in older version (e.g 8.0 to 7.3).
First Things First…
What Good Looks Like..
What Good Doesn’t Look Like..
Thank You
M. Ersharry Yunashtanto Zayyanatun Zulfa
Ikha Muliawati Mada Harahap