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