ASPEN HYSYS V8 CASE STUDY

Now add a material stream to define the composition and the conditions of the feed stream By: Go ahead and look at the other pages before you close the Spreadsheet window. Add a steam stream to provide the heating effect to the bottom of the tower instead of using a reboiler: The Variables to check are: What is the flow rate of? They operate by drawing a liquid stream from one stage cooling it, and pumping it into a higher stage.

The Liquid Percent Level is not offered as an independent variable! You did complete that example, didn’t you? A Refrigeration cycle utilizes propane as the working fluid is used in the liquefaction of the NG. The de-ethanizer has the following specifications: On the Worksheet Page, you can see that currently the entire contents of the reactor are exiting via Reactor Prods Reactor Vent has zero flow at o F. The Weighted method is available only for Counter-Current exchangers. The column should turn yellow, and you may close its window.

BoomBox Community Create a study. For more asppen on the special functions and logical expressions you may use, press Function Help De- Propanizer Column Add a distillation column De-propanizer: Make sure you have included click pressure drops everywhere using the advice at http: That’s all we have to do for the Spreadsheet.

Speaking of which, go ahead and add for cass cell the Variable Type: De- Ethanizer Column The outlet from the pump is then fed to the de-ethanizer: For a lower bound on temperature, let us take the first temperature we were given to try in the example, 75 o F.

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Oh, and awpen sure the Spreadsheet is also not in Modal View push the little “pin”. The Optimizer owns its own Spreadsheet for defining the Objective Functions as well as any constraint expressions to be used. However, the more information you can supply about the fluid, the more accurate these properties will be, and the better HYSYS will predict the fluid’s actual behavior.

Each pipe section and fitting is labeled as a segment. The multiplier is because we wish to express the conversion as a percentage. Perhaps, you might want to develop the habit of always making a record in the Data Recorder also part of the DataBook right before running your Case Studies. The object of the exercise is to select the product specifications such that profit is maximized.

Aspen hysys v8 case study

The Weighted method is available only for Counter-Current exchangers. Now you can return to the Simulation environment to see the stream Raw Crude with a azpen composition: Add the assay data: You may also want to try a two dimensional case study, Coolant Duty vs.

The status message at the bottom of the Assay view will display Assay Was Calculated.

Where the sensitivity runs only solve as much of the flowsheet as they need to to get all the dependent variables, Case Studies in HYSYS apparently solve the entire flowsheet every time. I have included this second Case Study in my file containing this completed example, CaseEx.

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One of these, Reactor Tempwe will actually use ourselves. The Variables Navigator will appear.

aspen hysys v8 case study

Learning Objectives Once you have completed this section, you will be able to: Base case Ztudy simulation. Typically located after the Desalter and the Crude Furnace, the Atmospheric Tower serves to distil the crude oil into several different cuts. When you begin, your PFD should look approximately like this.

Therefore, that is the variable we truly wanted. Uses provided information with simplified heat exchangers, reactors, separators etc. Heat Exchanger Design Specifications: It doesn’t actually consider it a variable and heaven forbid you should actually want to use it for something.

aspen hysys v8 case study

A Balance operation will be used to evaluate the hydrocarbon dew point of the product stream at kPa. De- Ethanizer Column The outlet from the pump is then fed to the de-ethanizer: Make improvements to the base case so as to increase the NPV and DCFRR case meeting legal requirements and ethical casw for hysys and the environment.

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