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