Gas Sweep: 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:

Variable	Default Value	Range

○ Sweeping Agent Indicates the gaseous stock mixture or pure component that is selected as the sweeping agent. Click on the list box to bring up a list of registered stock mixtures or pure components in order to select one.	<none>	Any Gaseous Stock Mixture or Pure Component
○ Consumption Flowrate (STD) (L/h) The standard volumetric flowrate of the sweeping agent that is consumed for the operation.	180.0	Positive
● Volume Consumption (L) The volume of the sweeping agent that is consumed for the operation (per cycle, per equipment unit).	0.0	Positive
● Mass Consumption (kg) The mass of the sweeping agent that is consumed for the operation (per cycle, per equipment unit).	0.0	Positive
○ System Pressure (atm) The operating pressure of the vessel.	1.0	Positive
○ Gas Temperature (^oC) The temperature of the sweeping agent in the vessel.	25.0	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.	5.0	Positive
◙ Sweeping Time (min) The actual duration of the operation.	15.0	Positive
○ Ignore Labor? Check this box to ignore labor for this operation. This option is used only if the process time is set by a master-slave relationship.	Yes	Yes/No

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 Gas Sweep: Modeling Calculations.

•Source of Sweeping Gas...

The sweeping gas can be selected from the lists of registered pure components and stock mixtures.

•Duration Options...

You can set the process time (the sweeping time) or match the duration of this operation to the duration of another operation by introducing a master-slave relationship between the two operations. If you introduce a master-slave relationship, the program will match the setup time, the process time and the turnaround time of this operation (the ‘slave’) with the corresponding times of the reference operation (the ‘master’ operation). For more details on how to setup a master-slave relationship, see The Scheduling Tab.