Holding: Oper. Conds Tab

HoldOperConds.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

 

◙ Holdup Time (min)
The duration of the operation.

15.0

Positive

○ Ignore Labor?
Check this box to ignore labor for this operation. This option is used only if the process time is set by a master-slave relationship.

Yes

Yes/No

● Initial Temperature (oC)
The temperature of the contents at the beginning of the operation.

25.0

Positive

● Final Temperature (oC)
The temperature of the contents at the end of the operation.

25.0

Positive

○ Ambient Temperature (oC)
The ambient temperature.

25.0

Positive

● Temperature Change (oC)
The temperature change during the operation.

0.0

Positive

● Temperature Change Rate (oC/min)
The temperature change rate during the operation.

0.0

Positive

● Heat Loss/Gain Rate (Watt)
The rate at which heat is exchanged with the environment.

0.0

Positive

● Overall UA (kcal/h-oC)
The product of overall heat transfer coefficient and heat transfer area.

1290.92

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

○ 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.

90.0

[0,100)

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