Aspen HYSYS Training Module 1: What is Aspen HYSYS? Tutor: M. Ersharry Yunashtanto Zayyanatun Zulfa Ikha Muliawati Mada Harahap Supported by: Simulation + Use of a computer program to quantitatively model the characteristic equation of a process in term of material and energy stream. Principle Known Feeds Predict Products Given Process Model • Process Design/Analysis • Optimization • Equipment Sizing, Costing Principle 2 Example of process model Recycle flowrate? Catalyst? Steam Rate ? Reflux? P? CW rate? T, P? Chemistry? Reactor type? Number of trays?, Feed Stage? Right sequence? Purity? Model Steady-State Modeling: Input – Output = 0 FV F x F(x) xi FL F FV FL Solution Space 0 xs F(x)=0 •Design •Operation •Optimization Simulation Taken Time or Number of Iteration Dynamic Modeling: Input – Output = Accumulation PC F FC FV x •Design Verification •Operation Analysis •Control Strategy •Operator Training LC FL dV / dt F ( FV FL ) 0 Time HYSYS Uniqueness • 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 Degree of Freedom Degree of Freedom: the number of independent parameters that define its configuration DOF = No of variables – No of equations 5x + 3y = 75 10x + 6y = 150 Yes, because it has unique solutions. DOF = 2 – 2 = 0 Degree of Freedom (2) 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 yN2 = 1 – yO2 Then, DOF = 3 + 0 – 2 – 1 = 0 (solved) Degree of Freedom (3) • 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 Density ? Viscosity ? Cp, Cv, Cp/Cv ? Enthalpy ? Thermal Conductivity ? MW ? K-value ? etc.... DOF Specification User Input User Specified BLUE Variable in HYSYS First Things First… 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). What Good Looks Like.. What Good Doesn’t Look Like.. Thank You M. Ersharry Yunashtanto Zayyanatun Zulfa Ikha Muliawati Mada Harahap