The example system shown below is a simple two-reactor activated sludge configuration.
A simple two-reactor activated sludge configuration
The PetWin main simulator window interface consists of:
Setting up such a system is easy to do – it's a matter of minutes. Buttons on the toolbar at the top of the main simulator window represent the various unit processes available in PetWin. Simply click on a button, move your mouse cursor over the area on the drawing board where you want to place the element, and click the mouse button.
A quick way to gain access to local menus which contain commands specific to a particular object is through use of the right mouse button. For example, if you point to the influent and right-click, you will get a local menu.
Double-clicking on a drawing board icon for an element in a configuration gives access to all pertinent information for that element. For example, double-clicking on a bioreactor element allows access to physical and operational data, as well as the facility to set up data monitoring.
Dialog box allows access to all bioreactor information
Once you've double-clicked on an element icon to gain access to this information, it's just a matter of clicking on the tab you are interested in. For example, clicking the Operation tab will allow you to change the bioreactor operating parameters shown below.
The bioreactor operation tab
Setting up influent data is a quick and easy process. If you double click on an influent element drawing board icon, you will see the following dialog box.
Access the influent properties to set up influent data
Clicking the Edit data button as shown will open the Influent itinerary editor, as shown below.
The variable influent itinerary editor
The Influent itinerary editor provides a spreadsheet-like interface for entering data. PetWin even offers several different strategies for filling in blanks in your data! It is very easy to import data into the itinerary editor from files or to copy it in from a spreadsheet – in fact, the data in the example shown above were pasted from Microsoft ExcelTM!
Running A Simulation
Steady state and dynamic simulations are run from the main simulator window. Once you have taken a few minutes to specify information for the various elements in your configuration, commencing a simulation is simply a matter of clicking the appropriate button on the toolbar!
A very powerful new feature is PetWin's ability to schedule many different operating conditions such as dissolved oxygen setpoints, air flowrates, and temperature. For example, suppose that you were simulating varying temperature conditions. With PetWin, you easily can set up a temperature schedule using the dialog box shown below.
Scheduling operating conditions is not a problem!
Help and Manual
PetWin comes with an extensive manual which is shipped as a series of Microsoft WordTM documents each consisting of a chapter so you can easily print out the sections of specific interest.
You may find this unnecessary as the contents of this manual are available via PetWin's online help. You can access this help system via the toolbar help buttons. Another useful feature that makes PetWin easy to learn is context-sensitive help. To get help that is relevant to a particular dialog box you are working in, simply hit the F1 key and PetWin will access related topics from the help system and display them to you.
PetWin allows you to customize the interface used to access the help system. Either the traditional Windows 95/NT help or the latest Windows 98/HTML help format may be used. Examples of these are shown below.
A Windows 98/HTML help format window
A Windows 95/NT help format window
Viewing Simulation Results
The PetWin Album provides a fully integrated means to display simulation results. Using the album you can view data in the following formats:
Activating the album is as simple as clicking the appropriate button on the main window toolbar. The album consists of a series of tabbed pages which may contain any or combinations of the above data display formats. Shown below is the album with the active page displaying a chart.
The album interface
PetWin offers a number of features to aid in creating attractive, professional reports. PetWin has its own internal Notes editor (shown below) to help keep track of project details.
PetWin's internal simulation notes editor
It also is very easy to get results from PetWin into your word processor or spreadsheet. Charts, tables, system configuration layouts, etc. can be copied and pasted from PetWin to your reports. Tables can be exported as tabbed text and then quickly converted to tables, such as the one shown below which is a section of a WordTM document.
A PetWin table exported to a word processing application
PetWin offers users the ability to customize a number of project and environment settings to suit their needs. For example, some of the customizable features include:
Access to the customizable features is managed through a central location, shown below.
All customizable features accessed through one dialog box
PetWin is not only a slick simulator package. The user has ready access to detailed model features for the many operations. Model parameters may be accessed conveniently from a single Model parameter editor, shown below.
PetWin offers many utilities to facilitate process analysis. These include;
Model parameters may be changed through a single editor