Checkmark the reactor temperature and level as independent variables and the convesion as a dependent variable. When you begin, your PFD should look approximately like this. We will need two more variables: Let’s go ahead and get the Liquid Percent while we are here. Percentage , and the Variable Name: When you begin, your PFD should look approximately like this.
Oh, and make sure the Spreadsheet is also not in Modal View push the little “pin”. On the Variables Page, you should see three variables already defined. Speaking of which, go ahead and add for that cell the Variable Type: Therefore we must make our own Conversion calculation. 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. Now, in cell B6 , enter the following equation: I recommend that you now look at the results and try to analyze why they came out as they did and play with the various 3D graph controls use the secondary mouse button over the graph to bring up the menu.
You did complete that example, didn’t you?
Since we will be varying the liquid volume by changing the Liquid Level percentage and we like cawe numbers, go ahead and change the Vessel Volume to ft 3. Let’s go ahead and get the Liquid Percent while we are here. It’s easy, because the variables are already defined, and it’s informative. Blissfully, unaware that we just made a mistake, let us now proceed to doing something about the Conversion. Percentageand the Variable Name: 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.
case study in hysys
Percentageand the Variable Name: Perhaps, you’ve noticed our first problem. 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. However, you the boiling point of the mixture is around o F.
Begin by adding a Spreadsheet to the simulation on the Object Palette. All right, we’ll worry about that in a second. On the Reactions Page, you can see that the current Liquid Volume is ft 3 and tuorial the current conversion in the reactor is 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.
Perhaps, you rutorial want to develop the habit of always yysys a record in the Data Recorder also part of the DataBook right before running your Case Studies. The Liquid Percent Level is not offered as an independent variable! Since the general rule goes, the bigger the piece of equipment, the more expensive it is, we’d like to see how sensitive the tutorual is to the size of the reactor.
This example will build on the simulation you made for the Chemicals Tutorial Caase from Chapter 4 of the Tutorials Manual.
Now we are finally, finally ready to set up the Case Study normally it is not at all this much of an ordeal. On the Variables Page, you should see three variables already defined. If you’ve worked with Aspen, you’ve probably done Sensitivity Runs. Choose a step size of 5 o for a nice continuous curve.
Case Studies Example
I have included this second Case Tutoriall in my file containing this completed example, CaseEx. We are going to do things sutdy little differently from the way we did things in the SET example with the Spreadsheet.
Pick the Spreadsheet as the Object and B6: Utility costs, and other issues, are directly tied to the temperatures we use for various operations. Therefore we must make our own Conversion calculation. Again, I don’t know why, I’m just reporting what I saw and warning you to be aware that the data you get may possibly be buggy.
Go ahead and look tutorjal the other pages before you close the Spreadsheet tuutorial. In this case that would mean running an unnecessary column times from the Number of States in the upper right corner. You should see a Bull’s Eye when you are over a place you may “drop” it.
Since it is the same variable, despite the slightly different nomenclature, HYSYS will change one when it changes the other. Push Add to create a new Case Study.
The Variables Navigator will appear.