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.