Simulation pull-down menu

Before we start a simulation, choose Parameters under the Simulation pull-down menu to select the time of simulation. If we are using the XY Graph, we need to double-click its icon and edit its parameters to make the time information consistent. 

All we need is to drag-and-drop the icons that we need from the toolboxes into a blank model window. If this window is not there, open a new one with the File pull-down menu. From here on, putting a feedback loop together to do a simulation is largely a point-and-click activity. An example of what Simulink can generate is shown in Fig. M5.3. 

For curious minds The first time you use the PID controllers, drag the icon onto a new simulation window, select the icon and then Look under mask under the Edit pull-down menu. You will see how the controllers are put together. The simple PID controller is... 

The main window of NMR-SIM is subdivided in the title bar with the program name, the menu bar with the pull-down menu commands File, NMR-Wizard, Edit etc., the rf channel option bar with two accessible rf channel combo boxes and the main status window, see Fig. 1.3. Each command in the menu bar opens a pull-down menu that may contain sub-menus or commands that can be selected and opened/executed. The rf channel option bar uses isotope identifier to assign a specific nucleus and hence NMR frequency to the FI or F2 channel. The main status window is built up in line order and shows the pulse program name, spin system name and other optional files associated with the current simulation. 

Simulations are started using either the Run Experiment or Check Parameters Go commands in the Go pull-down menu. The Check Parameters Go command opens the Experiment parameter dialog box to enable the parameters to be checked before the simulation is started. By default the configuration file used in the Check its require the output filename must to be entered prior to the calculation starting (Fig. 1.9). 

In NMR-SIM spectrum calibration is not normally necessary, since the chemical shifts in the spin system file are already defined on the ppm scale. However occasionally it might be necessary to calibrate a spectrum, particularly if comparing a simulated spectrum with an experimentally measured spectrum. In ID WIN-NMR the calibration mode is selected by choosing the Calibrate command in the Analysis pull-down menu. The calibration can be performed in two ways ... 

The definition and execution of "jobs" uses three pull-down menu commands. A job is selected using the File Job... command. It is also possible to change an existing job or to create a new job based on an existing file using the Edit Job definition command. To create a new job file an old job file has to be opened, the text modified to include the required configuration files and the file saved under a new name using the FilelSave as... command. Finally the series of simulations is started by the Go I Start job command. 

The Bloch simulator is started using the pull-down menu command Utilities Bloch module... The main display window is shown in Fig. 4.23. The different representation modes are available from the corresponding commands of the Calculate pull-down menu opening particular dialog boxes. The FilelCopy to clipboard function offers the possibility to transfer the current graphical representation in the main display window to the Windows clipboard and then into other Windows programs. 

Estimates for the additional stream properties are added using the PROPSETS.apt file on the CD-ROM that contains these course notes. To accomplish this, the ASPEN PLUS simulation file is opened first e.g., RADFRAC.bkp (which is available on the CD-ROM that contains these course notes). Under the File pull-down menu, the Import entry and the PROPSETS.apt file are selected. Aspen IPE automatically adds three new property sets, after which the file can be saved as RADFRAC-IPE.bkp, a copy of which is on the CD-ROM that contains these notes. To check that this has been accomplished, using the Data pull-down menu, select Setup and then Report Options. Then, display the Streams page by selecting the appropriate tab and click the Property Sets button. Observe that all three Aspen IPE property sets have been entered into the Selected Property Sets box. Now that the Aspen IPE property sets have been added, it is necessary to re-run the simulation. 

It remains to transfer the ASPEN PLUS simulation results into Aspen IPE. This is accomplished by selecting Send To Aspen Icarus from the File pull-down menu in ASPEN PLUS. The simulation results are loaded automatically into Aspen IPE. 

Enterthe simulation environmentby clickingon Return to Simulation Environment. To set up the conversion reactor, select a conversion reactor from the object palette and place it on the PFD. Connect feed and product streams and then double click on stream 1 and enter the temperature, 350°C pressure, 30.4 bar and molar flow, 7596 kgmol/h. Click on Composition and enter the molar fraction and then close the inlet stream window and double click on the conversion reactor then press the Reaction tab from the pull-down menu in front of Reaction Set and chose the reaction set. 

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