The following table shows the meaning of the variables appearing in this tab, as well as their default values and their generally acceptable range. Note that due to the manner by which the variables are used by the sizing and costing equations, the range of acceptable values may be further reduced.
|
Variable |
Default Value |
Range |
|
|
||
|
◙ Sublimation Capacity / Cycle |
0.0 kg |
Positive |
|
◙ Max Sublimation Capacity / Cycle |
600.0 kg |
Positive |
|
◙ Tray Area |
0.0 m2 |
Positive |
Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output
In Design Mode, the system calculates the sublimation capacity (in kg per cycle) based on the percentage of components that sublimate. If the calculated sublimation capacity exceeds the maximum, the system assumes multiple units operating in parallel with a total sublimation capacity equal to the calculated. The total tray area is calculated based on the number of entities processed per cycle and the entity specific area.
In Rating Mode, the user specifies the number of parallel units, their tray area and their sublimation capacity. If the sublimation or the area occupied by the entities exceeds the specified one then the system warns the user.
The equipment purchase cost is estimated using built-in correlations derived from vendor data. The equipment cost is a function of the sublimation capacity with a minimum sublimation capacity of 10 kg/cycle.
For more information on this equipment, see Discrete Freeze Dryer or Freeze Dryer.
For information on the left-hand side variables and options, see Equipment Data Dialog: Equipment tab.