High Pressure Homogenization: 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

○ Exit Temperature (C) The temperature of the final product at the end of the operation.	18.0	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	Agent Name
● 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
● 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
○ Power Consumption Set by User Check this box to set the power consumption.	No	Yes/No
○ 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
● Power (kW) The total power consumed for the operation (per cycle).	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
◙ Homogenization Time (h) The actual duration of the operation (per cycle). Note that this value can only be calculated in Rating Mode.	4.0	Positive
○ Number of Passes	1	Positive Integer
○ Pressure Drop (bar) The pressure drop in the homogenizer.	800	Positive
● Volumetric Throughput per Unit (L/min) The volume flow rate of the feed per equipment unit.	0.0	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 High Pressure Homogenization: Modeling Calculations.

● Modeling Options...
When either the Cell Disruption or the Homogenization with Reaction options is selected the High Pressure Homogenization: Mat. Balance Tab is displayed. From this tab, the user can specify stoichiometric transformations similar to reaction operations. The requirements differ slightly between the two options. In Cell Disruption a)the reactant must be exclusively a biomass component and b) the disruption kinetic parameters must be specified. In Homogenization with Reaction the user must specify the reaction extent. If no transformation is desired to take place, the Homogenization without Reaction option should be selected. In this case, the Material Balance Tab becomes unavailable.

● Duration Options...
The duration controls appear only if the procedure is in batch mode. In Rating Mode, you can set the process time (and the setup time), allow the process time to be calculated (based on the throughput), 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 operation (the ‘slave’) with the corresponding times of the reference operation (the ‘master’ operation). For more on master-slave relationship, see The Scheduling Tab.