Title Page

 Top  Previous  Next

Title Page

 

A process modeling session is started by highlighting Title Page at the top of the activity list and double clicking or by selecting Update! from the Emission Master's main window menu.  A data entry window will appear for accepting basic process information including product name, process step, and the process cycle time.  

 

Data entry items are described as follows: 

 

· Product Name: A name which refers to the final product being manufactured.

 

· Process Name: Many processes contain several processing steps.  The data which is entered in this space normally refers to the unit operation that identifies this part of the process.  For example 'Reaction Process', 'Isolation Step', etc.

 

· Process Cycle Time:  Overall processing time for the process.  This field is normally left unedited because the program updates this field with the revised cycle time as steps are added to the process.  However, if the process lasts longer than the sum of the modeling activities due to inactive periods in the process then this dynamically updated field may be changed to the longer cycle time estimate.  For example, a process contains 9 activity models that total 12 hours.  The process has long periods of idle time when emissions do not occur making the overall cycle time to be 25 hours. 

 

· Final Product Amount:  Enter the production weight for the final product in this field.  This field may be left blank. 

 

· Evaluation Date: The date that this environmental evaluation was initiated and the process recipe file was created.   

 

· File Name: A file name used in storing the emission data.

 

· Last Saved By: The name of the person who last saved the modeling file. 

 

· Last Saved On: Date that the program was last saved. 

 

· Comments: Notes may be added at this location to further clarify or document this data file. 

 

· Calculations:  Currently only MACT 1998 modeling equations are supported.

 

· Condenser Calculation

Zero Stage:  Condenser exit gas composition is calculated based on the original batch composition but at the specified condenser temperature.  This style calculation was used in versions of Emission Master 6.0 and earlier. 

Single Stage:  Condenser exit gas composition is calculated such that the exit gas is in equilibrium with the exit liquid condensate.  Air, nitrogen, or other non-condensable gases are assumed to exit the condenser in the exit vent gas stream. 

 

·Charge Calculation  Displacement losses occur with a liquid stream is charged or transferred into a vessel. 

       Initial Composition: The headspace concentration for each compound is made based on the initial composition of the initial vessel contents and the incoming inlet stream.  This setting will result in higher emission calculations than the Average Composition setting. 

       Average Composition: The headspace concentration for each compound is made based on the average batch composition during the charging or transfer operation.  This configuration generally results in the lowest emission calculation possible since it provides for the basic dilution that occurs during the filling operation through blending of the components in the system. 

 

Once the Title Page has been completed, the process information will be transferred to the upper right description box.  This data along with a list of the process activities will be added to the Title Page of the report for this evaluation.  As processing steps are modeled and added to an overall evaluation, the Title Page will be updated to reflect the cumulative process.