Module 1 - Introduction to Aspen HYSYS
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The document provides an overview of Aspen HYSYS, a computer program used for modeling material and energy streams in process engineering. It discusses steady-state and dynamic modeling, including input-output balances and degrees of freedom in process design. The text also highlights HYSYS's features, such as interactive simulation, fast solver capabilities, and user specification inputs.
Module 1 - Introduction to Aspen HYSYS
- 1. Supported by: Aspen HYSYS Training Module 1: What is Aspen HYSYS? Tutor: M. Ersharry Yunashtanto Zayyanatun Zulfa Ikha Muliawati Mada Harahap
- 2. + Use of a computer program to quantitatively model the characteristic equation of a process in term of material and energy stream. Simulation
- 3. Given Process Model Predict Products • Process Design/Analysis • Optimization • Equipment Sizing, Costing Known Feeds Principle
- 4. 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
- 5. 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 Time0 x )(/ LV FFFdtdV LV FFF F FV FL PC LCFC •Design •Operation •Optimization •Design Verification •Operation Analysis •Control Strategy •Operator Training Model
- 6. • 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
- 7. 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
- 8. 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)
- 9. • 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)
- 10. 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…
- 11. What Good Looks Like..
- 12. What Good Doesn’t Look Like..
- 13. Thank You M. Ersharry Yunashtanto Zayyanatun Zulfa Ikha Muliawati Mada Harahap