Batch Vaporization / Solvent Switch: Mat. Balance Tab (Solvent Switch Mode)

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

○ Scalable Check this box to scale the evaporation data up or down automatically when you adjust the process throughput (see Scale-up (or down) Process Throughput).	Yes	Yes/No
◙ Replacement Solvent Volume (L) The volume of the Solvent Switch stream per batch cycle and per equipment unit.	0.0	Positive
○ Include Check the box next to a component to indicate that the corresponding component is volatile.	No	Yes/No
◙ Relative Mass Evaporation The ratio of evaporation percentage to maximum evaporation percentage for each component.	1.0	Zero or Positive
◙ Evaporation Percentage (%) The percent ratio of evaporated mass to initial mass for each component.	0.0	[0,100]
○ Set by User Check this box to set the Average Heat of Vaporization.	No	Yes/No
◙ Average Heat of Vaporization (kcal/kg) The average specific heat of vaporization of the feed solution.	539.484	Positive

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 Batch Vaporization / Solvent Switch: Modeling Calculations.

•Component Evaporation Option...

If you select the top option (“Set Replacement Solvent Volume and Relative Mass Evaporation for Each Volatile Component”), you must specify the replacement solvent volume and you must also identify the volatile components and specify their relative mass evaporation in the Evaporation Data table. For instance if 3 kg of Acetone evaporate for every kg of Water, you should enter 3.0 for Acetone Relative Mass Evaporation and 1.0 for Water. This is necessary because this operation does not perform VLE calculations.
If you select the bottom option (“Set Evaporation % for Each Volatile Component”), you must identify the volatile components and specify their evaporation % in the Evaporation Data table.