### HYSYS CASE STUDY TUTORIAL

Now, in cell B6 , enter the following equation: When you begin, your PFD should look approximately like this. To shorten your simultation time enormously, open the column’s Property View. Now position your cursor over the 12C3Oxide’s Molar Flow and using the secondary mouse button , drag the number to cell B2 of the Spreadsheet. It doesn’t actually consider it a variable and heaven forbid you should actually want to use it for something. As you shall see o F is more than sufficient for an upper bound. Now we could plug about different combinations of temperature and size in by hand, but what would be the point when HYSYS has so thoughtfully provided us with a tool to do just that.

Yep, Conversion is nowhere to be found on that list of Variables. If you do not have such a file you may start from my version entitled ChemicalsEx. On the Reactions Page, you can see that the current Liquid Volume is ft 3 and that the current conversion in the reactor is Since the general rule goes, the bigger the piece of equipment, the more expensive it is, we’d like to see how sensitive the reaction is to the size of the reactor. Now we would like to explore that reaction a little more, from a plant design stand point. On the Parameters Page, checkmark the box that says Ignore column during calculations. Therefore we want our maximum temperature to be less than o F.

# Case Studies Example

Ztudy may also want to try a two dimensional case study, Coolant Duty vs. When you begin, your PFD should look approximately like this. One of these, Reactor Tempwe will actually use ourselves. Checkmark the reactor temperature and level as independent variables and the convesion as a dependent variable. We will need two more variables: It’s easy, because the variables are already defined, and it’s informative.

Since it is the same variable, despite the slightly different nomenclature, HYSYS will change one when it changes the other. I have included this second Case Study in my file containing this completed example, CaseEx.

HLSC 120 ESSAY

## case study in hysys

Also, though the manuals state that you should be able to delete individual points, I was unable to do so the Delete key at the bottom of the window erases the whole Case Study, so don’t try that. Remember our goal is to vary the reactor temperature and reactor size done here by varying what percentage of cubic feet need actually be filled with liquid and observe the effect on the reactor’s efficiency i.

That’s right girls and boys, the Spreadsheet and your profs complain you don’t pay attention — Well, actually they complain that you don’t come to class, but that is neither here nor there. In general it is a good idea to be aware of your settings before running a case study as the Case Study will not return you to your original state afterwards.

Go ahead and look at the other pages before you close the Spreadsheet window. Since we will be varying the liquid volume by changing the Liquid Level percentage and we like even numbers, go ahead and change the Vessel Volume to ft 3. This means that if you went so far as to run with no coolant, you would lose product out the vent tuttorial a good thing.

In this case, the temperature we set for our reactor determines how much coolant is required and has a direct effect on how well the column runs, and of course, it has a critical effect on the reaction itself. On the Parameters Page, checkmark the box that says Ignore column during calculations. For a lower bound on temperature, let us take the first temperature we were given to try tutoiral the example, 75 o F. Now we would like to explore that reaction a little more, from a plant design stand point.

The column should turn yellow, and you may close its window.

CONTOH CASE STUDY PIH

# Case Studies Example

If stydy do not have such a file you may start from my version entitled ChemicalsEx. Yep, Conversion is nowhere to be found on that list of Variables. This example will build on the simulation you made for the Chemicals Tutorial Case from Chapter 4 of the Tutorials Manual.

In this case, the temperature we set for our reactor determines how much coolant is required and has a direct effect on how well the column runs, and of course, it has a critical effect on the reaction itself. Oh, and make sure the Spreadsheet is also not in Modal View push the little “pin”.

This is the reason that that is not the variable we really wanted to use. You may also want to try a two dimensional case study, Coolant Duty vs.

Pick the Spreadsheet as the Object and B6: We will need two more variables: Now we would like to explore that reaction a little more, from a plant design stand point.

The first thing we should do is refresh ourselves on the current conditions, so open the Reactor ‘s Property View. Well just in case you didn’t, the example consisted of using a CSTR to react Propylene Oxide with Water to make Propylene Glycol, then separating that out as a product. When you are finished, the page should look like it does below Note that the conversion, in red because it is a spreadsheet calculated value, is the same as we saw it on the Reactor’s Property View.

One of these, Reactor Tempwe will actually use ourselves. That’s all we have to do for the Spreadsheet.