Centrifugation: Utilities Tab

CentrifugationUtilities.jpg
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 Set by User
Check this box to set the exit temperature.

No

Yes/No

Exit Temperature (οC)
The temperature of the material at the end of the operation.

25.0

Positive

Heat Transfer Agent Name
Indicates the heat transfer agent used for 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. (C)
The inlet temperature of the heat transfer agent.

5.0

Negative/Positive

Outlet Temp. (C)
The outlet temperature of the heat transfer agent.

10.0

Negative/Positive

Heating (kcal/h)
The heat transfer rate of the heating agent, if a heating agent is used

0.0

Positive

Cooling (kcal/h)
The heat transfer rate of the cooling agent, if a cooling agent is used.

0.0

Positive

Agent 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)

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 into 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.

50

[0,100)

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

Specification Choices / Comments

Energy balances are done to calculate any heating/cooling requirement for maintaining the exit temperature; for more details, see Centrifugation: Modeling Calculations.