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 |
|
|
||
|
◙ Volume |
0.0 L |
Positive |
|
◙ Max Volume |
15,000,000 L |
Positive |
|
○ Tank Depth |
2.0 m |
Positive |
|
○ Length / Width |
2.5 |
Positive |
|
● Length |
0.0 m |
Positive |
|
● Width |
0.0 m |
Positive |
|
○ Number of Compartment |
9 |
Positive |
Symbol Key: ○ User-specified value (always input); ● Calculated value (always output); ◙ Sometimes input, sometimes output
In Design Mode, the user specifies the Maximum Volume, the basin’s depth and the Length to Width ratio and the system computes the Number of Units and the Volume of the basin, as well as its length and width. The liquid volume demand is basically determined by the volumetric feed flow into the aeration basin.
In Rating Mode, the user specifies the Number of Units, the Volume and the basin’s depth and length to width ratio.
The equipment purchase cost is based on the total vessel volume. By default it is calculated by the program’s built-in model for an Aeration Basin, with a minimum costing volume of 200 m3.
● Number of Compartments. The main characteristic of the Plug-Flow Aeration Basin is the multiple compartment in the vessel. The orientation of these compartments may be set along the length or along the width of the basin, and can affect the pattern of the flow in the reactor and the cross sectional area of the liquid flow of the Plug Flow reactor.
For more information on this equipment, see Plug-Flow (PF) Aeration Basin.
For information on the left-hand side variables and options, see Equipment Data Dialog: Equipment tab.