Drying Operations: Utility Data Tab

DryingUtilityData.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

 

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

<Steam>

Any Heating Agent

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

152.0

Positive

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

152.0

Positive

○ Specific Amount (kg/kg evap.)

2.0

Positive

● Rate (kg/h)
The mass flow rate of the heating 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 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 (Per Area) (kW/m2)
The power consumed for the operation per tray area.

0.0

Positive

◙ 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

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

Specification Choices / Comments

•Heating Requirement...

Please note that the amount of heating required for drying is calculated from the specific amount requirement and not from an energy balance.

•Specific Power...

The value and units of specific power may be different from the above because the depend on the specific dryer. That is the case because this dialog is used in several different drying operations.