GBX Cont. Stoich. Reaction Operations: 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

○ Simulate Reaction Calculations Check this box to show the Reactions tab.	Yes	Yes/No
○ Simulate Separation Calculations Check this box to show the Split tab. Note that this option is only available in Reaction/Separation procedures.	Yes	Yes/No
○ Final Temperature (^oC) The final temperature of equipment contents after the end of the operation.	25.0	Positive
◙ Heating Duty (kcal/h) The heating duty of the heat transfer agent.	0.0	Positive
◙ Cooling Duty (kcal/h) The cooling duty of the heat transfer agent.	0.0	Positive
○ Agent Indicates the heat transfer agent used by the operation. Click on the list box to bring up a list of available heat transfer agents in order to select one.	<Chilled Water>	Any Heat Transfer Agent
● Inlet Temp. (^oC) The inlet temperature of the heat transfer agent.	5.0	Positive
● Outlet Temp. (^oC) The outlet temperature of the heat transfer agent.	10.0	Positive
● Rate (kg/h) The mass flow rate of the heat transfer agent.	0.0	Positive
○ Heat Transfer Efficiency(%) The heat transfer agent efficiency. If the value is lower than 100% then an increased heat transfer agent amount will be calculated by the program to satisfy the required duty.	100.0	[0,100)
○ Pressure Set by User? Check this box to set the operating pressure of the equipment.	No	Yes/No
◙ Pressure (atm) The operating pressure of the equipment.	1.0	Positive
● Throughput per Unit (kg/h) The mass flowrate of the feed stream per equipment unit.	0.0	Positive
○ Power Type Indicates the power type that is used by the operation. Click on the list box to bring up a list of available power types in order to select one.	<Std Power>	Any Power Type
◙ Specific Power (kW/(kg/h)) The power consumed for the operation per mass flow rate of material.	0.1	Positive
◙ Total Power (kW) The total power consumed for the operation (per cycle).	0.0	Positive
◙ Power Per Unit (kW) The power consumed for the operation per equipment unit.	0.0	Positive
○ Power Dissipation to Heat (%) The percentage of total power consumed for this operation that turns into heat, thereby raising the temperature of the material contained in the equipment.	100.0	[0,100]
○ 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
◙ Process Time (min) The actual duration of the operation.	60.0	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 Continuous Stoichiometric Reaction/Separation in a GBX: Modeling Calculations.

•Pressure...

The pressure of the system, if not specified by the user, is set equal to the pressure of the previous operation.

•Duration Options...

In Rating Mode, you can set the process time (and the setup time), allow the process time to be calculated (based on the throughput of the units), or allow the duration to match exactly the duration of another operation either in the same procedure or in another procedure. In Design mode, you must either specify the process time (and the setup time) or allow the duration to match exactly the duration of another operation (either in the same procedure or in another procedure).

If you choose to match the duration of this operation with the duration of another operation, you introduce a master-slave relationship between the two operations. The program will match the setup-time, the process time and the turnaround time of this pass through operation (the ‘slave’) with the corresponding times of the reference operation (the ‘master’ operation). For more on master-slave relationship, see The Scheduling Tab.