Freeze Drying: Utilities Tab

FreezeDryingUtilities.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

 

Power Type
Indicates the power type that is used by the operation if electricity is selected as the heat source. 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 electricity power consumed for the operation.

0.0

Positive

Heating Agent Name
Indicates the heating agent that is used by the operation if a heating agent is selected as the heat source. Click on the list box to bring up a list of available heating agents in order to select one.

<Steam>

Any Heating Agent

Inlet Temp. (oC)
The inlet temperature of the heating agent.

152.0

Positive

Outlet Temp. (oC)
The outlet temperature of the heating agent.

152.0

Positive

Rate (kg/h)
The mass flow rate of the heating agent.

0.0

Positive

Duty (kcal/h)
The heat transfer rate of the heating agent.

0.0

Positive

Heat Transfer Efficiency (%)
The heat transfer efficiency for heating of the operation.

90

[0,100)

Coefficient of Performance
The ratio of cooling load (negative enthalpy change of material contents) to electricity consumption.

3.0

 

Cooling Agent Name
Indicates the cooling agent used for the operation. Click on the list box to bring up a list of available cooling agents in order to select one.

<Chilled Water>

Any CoolingAgent

Inlet Temp. (oC)
The inlet temperature of the cooling agent.

5.0

Positive

Outlet Temp. (oC)
The outlet temperature of the cooling agent.

5.0

Positive

Rate (kg/h)
The mass flow rate of the cooling agent.

0.0

Positive

Duty (kcal/h)
The heat transfer rate of the cooling agent.

0.0

Positive

Heat Transfer Efficiency (%)
The heat transfer efficiency for freezing of the operation.

90

[0,100)

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