Cont. Stoich. RXN in PFR: Oper. Conds Tab

PFStoichRxnOperConds.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

 

◙ Final Temperature (oC)
The final temperature of vessel contents after the end of the operation.

25.0

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

○ Heat Transfer 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

● Rate (kg/h)
The mass flow rate of the heat transfer agent.

0.0

Positive

○ Pressure Set by User
Check this box to set the pressure.

No

Yes/No

◙ Pressure (atm)
The operating pressure of the equipment.

1.0

Positive

◙ Actual Residence (Space) Time (h)
Note that this value is set in design mode and calculated in rating mode.

1.0

Positive

◙ Min Required Residence (Space) Time (h)
Note that this value is calculated in design mode and set in rating mode.

0.25

Positive

○ Working / Vessel Volume (%)
The volume of reactor contents expressed as percentage of the volume of the reactor.

100.0

(0,100)

● Working Volume (L)
The volume of reactor contents.

0.0

Positive

○ Gaseous Components Available to React
Check this box to consider gaseous components in reactions.

Yes

Yes/No

○ 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 Volume) (kW/m3)
The power consumed for agitation per volume of material.

0.1

Positive

◙ Total Power (kW)
The total power consumed for agitation (per cycle).

0.0

Positive

◙ Power Per Unit (kW)
The power consumed for agitation 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 COnt. Stoich. RXN in PFR: Modeling Calculations.

•Residence (Space) Time...

The actual value is input in Design mode and output in Rating mode. The Min Required value is input in Rating and it is used for calculating the Equipment Capacity Utilization (actual divided by minimum).

•Pressure...

The pressure of the system, if not specified by the user, is set equal to the pressure of the previous operation.

•Gaseous Components Available to React...

If you don’t check the option ‘Gaseous Components Available to React’, then only the liquid components will be considered for the reaction. This option is only available if the reaction takes place in the liquid phase.