Batch Concentration: Utilities Tab

MembraneFiltrationUtilities.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 Temp. (oC)
The temperature of the material at the end of the operation.

25.0

Positive

○ Heating / Cooling 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>

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

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

0.0

Positive

◙ Cooling Duty (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

○ 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/m2)
The area-specific power consumed for the operation.

0.2

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]

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 Batch Concentration: Modeling Calculations.

•Heating / Cooling...

The user simply specifies the heating or cooling agent that is required to maintain the specified outlet temperature. The program calculates the heating / cooling requirement and the agent mass flow.