Venting: Oper. Conds Tab

Variable Definitions, Ranges and Default Values

The following table shows a brief description of the variables appearing in this tab. The table also displays their default values and their generally acceptable range. Note that due to how the variables are used in the modeling equations, the range of acceptable values may be further reduced; for more details, see Venting: Modeling Assumptions & Constraints.

Variable	Default Value	Range

● Initial System Pressure (atm) The pressure of the system before the start of the operation.	1	Positive
○ Final System Pressure (atm) The pressure of the system after the end of the operation.	1	Positive
○ Setup Time (min) The amount of time (per cycle) spent before each operation is carried in preparation for the actual execution of the operation. It may involve actions like cleaning, vacuuming, setting up of equipment, etc. which the user opted not to model explicitly.	0.0	Positive
○ Venting Time (min) The actual duration of the operation.	15.0	Positive

Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output

Specification Choices / Comments

The following list describes the available specification choices in this tab; for more details on how these are implemented, see Venting: Modeling Calculations.

•Initial System Pressure...

The initial pressure of the system depends on the previous operations of the procedure and can be below or above atmospheric.