Tray Dryer: Equipment Tab

Variable Definitions, Ranges and Default Values

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

◙ Tray Area The total tray area.	0.0 m²	Positive
◙ Max Tray Area The maximum tray area that a unit of this type is available for purchase in the market.	40,000 L	Positive
○ Dryer Type The type of dryer used. Affect costing	Atmospheric	Atmospheric/Vacuum

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

Sizing: Design Mode

In Design Mode, the user specifies the depth of wet cake (see Tray Drying: Oper. Conds Tab) and the system calculates the tray area by dividing the calculated wet cake volume by the wet cake depth. If the calculated tray area exceeds the maximum allowable tray area per unit, the system assumes multiple identical units operating in parallel with a total tray area equal to the calculated.

Sizing: Rating Mode

In Rating Mode, the user specifies the number of parallel units and their tray area and the system calculates the wet cake depth. If the calculated wet cake depth exceeds the maximum allowable value, the user is warned.

Costing

The equipment purchase cost is estimated using built-in correlations derived from vendor data. The equipment cost is a function of the total tray area with minimum area of 5.0 m².

For more information on this equipment, see Tray Dryer.

For information on the left-hand side variables and options, see Equipment Data Dialog: Equipment tab.