Thickener Costing Method
Costing Method Parameters
The following parameters are constructed for the unit on the FlowsheetCostingBlock (e.g., m.fs.costing.thickener) when applying the cost_thickener costing method in the watertap_costing_package:
Description |
Symbol |
Parameter Name |
Default Value |
Units |
|---|---|---|---|---|
Capital cost A parameter \(^1\) |
\(A\) |
|
4729.8 |
\(\text{USD}_{2011}\text{/ft}\) |
Capital cost B parameter \(^1\) |
\(B\) |
|
37068 |
\(\text{USD}_{2007}\) |
Costing Method Variables
The following variables are constructed on the unit block (e.g., m.fs.unit.costing) when applying the cost_thickener costing method in the watertap_costing_package:
Description |
Symbol |
Variable Name |
Index |
Units |
|---|---|---|---|---|
Diameter |
\(d\) |
diameter |
None |
\(\text{ft}\) |
Capital Cost Calculations
Capital cost is dependent upon the thickener diameter, \(d\), as shown in the equations below.
\[C_{cap,tot} = A * d + B\]
Operating Cost Calculations
Electricity \(C_{elec}\) is a variable operating cost based on the energy intensity \(E\) of the unit process (electricity consumption for the thickener), electricity price \(P\), electricity flow \(Q\), and the plant utilization factor \(f_{util}\). The annual electricity costs are calculated as:
\[C_{op, tot} = C_{elec} = E Q f_{util} P\]
Code Documentation
References
[1] W. McGivney, S. Kawamura, Cost estimating manual for water treatment facilities, John Wiley & Sons, 2008. http://onlinelibrary.wiley.com/book/10.1002/9780470260036.