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 |
|
||
○ Solvent Switch Stream |
<none> |
Any Input Port |
○ Final Temperature (oC) |
70.0 |
Positive |
◙ Pressure (atm) |
1.0 |
Positive |
○ Vacuum Pump |
<none> |
Any Vacuum Pump |
○ Vacuum Pump Power (kW) |
0.0 |
Positive |
● Heating Duty (kcal/h) |
0.0 |
Positive |
○ Heating Agent Name |
<Steam> |
Any Heating Agent |
● Inlet Temp. (oC) |
152.0 |
Positive |
● Outlet Temp. (oC) |
152.0 |
Positive |
● Rate (kg/h) |
0.0 |
Positive |
○ Heat Transfer Efficiency(%) |
100.0 |
[0,100) |
○ Setup Time (min) |
5.0 |
Positive |
◙ Evaporation Time (min) |
60.0 |
Positive |
◙ Evaporation Rate (L/h) |
120.0 |
Positive |
○ Gaseous Stream |
<none> |
Any Output Port |
○ Gas Sweep Rate (L/h) |
0.0 |
Positive |
○ Condenser On |
Yes |
Yes/No |
○ Condenser Temperature (oC) |
15.0 |
Positive |
○ Condensed Liquid Stream |
<none> |
Any Output Port |
○ Power Type |
<Std Power> |
Any Power Type |
◙ Specific Power (Per Volume) (kW/m3) |
0.0 |
Positive |
◙ Total Power (kW) |
0.0 |
Positive |
◙ Power Per Unit (kW) |
0.0 |
Positive |
○ Power Dissipation to Heat (%) |
100.0 |
[0,100] |
Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output
The following list describes the available specification choices in this tab; for more details on how these are implemented, see Batch Vaporization / Solvent Switch: Modeling Calculations.
•Operating Mode...
By default, concentration takes place during evaporation. Use the solvent switch mode in order to add new solvent that will replace any lost liquid volume during evaporation.
•Duration options...
You can set the process time (evaporation time), or have the process time calculated based on evaporation rate.
•Vent Condenser...
If the vent condenser is on, the condensed vapor can be removed through a different port/stream and handled appropriately. In that case only the uncondensed components remain in the gaseous stream. If the condenser is not on, then, all vaporized components will be in the gaseous stream.
•Pressure...
The pressure of the system, if not specified by the user, is set equal to the pressure of the previous operation.
•Vacuum Pump Controls...
Note that the vacuum pump controls are only displayed if the operating pressure is less than the ambient pressure (specified through the flowsheet’s Reference Conditions dialog).
Click on the vacuum pump list box to bring up a list of available vacuum pumps in order to select one, or select “(none)” (default) if equipment sizing, costing and scheduling calculations are not important.
To create a new vacuum pump and add it to the list of available vacuum pumps, click on the New button (). This will open the Auxiliary Equipment Properties dialog for auxiliary equipment of the vacuum pump type (see Auxiliary Equipment Properties Dialog: Aux. Equipment tab (Vacuum Pump)). Through this dialog, you can view or edit the properties of the auxiliary equipment resource (e.g., name, size, purchase cost, consumables, scheduling).
The same dialog is displayed if you select one of the available vacuum pumps from the list and click on the View/Edit Properties button ().
Click on the Setup button to display the Vacuum Pump Consumption dialog (see Vacuum Pump Power Consumption Dialog), and select different options for specifying the power consumption of the vacuum pump. By default, the vacuum pump power specification option is “Set Total Power” and the total power consumption of the vacuum pump can be set by the user (the default value is zero). For more information, see Vacuum Pump Auxiliary Equipment Calculations.