Reverse Osmosis Costing Method
Costing Method Parameters
The following parameters are constructed for the unit on the FlowsheetCostingBlock (e.g., m.fs.costing.reverse_osmosis) when applying the cost_reverse_osmosis costing method in the watertap_costing_package:
Description |
Symbol |
Parameter Name |
Default Value |
Units |
|---|---|---|---|---|
Standard RO |
||||
Membrane replacement factor (fraction of membrane replaced/year) |
\(f_{mem,\, replace}\) |
|
0.2 |
\(\text{yr}^{-1}\) |
Membrane unit cost |
\(C_{mem}\) |
|
30 |
\(\text{USD}_{2012}\text{/m}^2\) |
High-pressure RO |
||||
Membrane replacement factor (fraction of membrane replaced/year) |
\(f_{mem,\, replace}\) |
|
0.2 |
\(\text{yr}^{-1}\) |
Membrane unit cost |
\(C_{mem}\) |
|
75 |
\(\text{USD}_{2012}\text{/m}^2\) |
Costing Method Variables
The following variables are constructed on the unit block (e.g., m.fs.unit.costing) when applying the cost_dewatering costing method in the watertap_costing_package:
Description |
Symbol |
Variable Name |
Index |
Units |
|---|---|---|---|---|
Membrane area |
\(A_{mem}\) |
|
None |
\(\text{m}^2\) |
Capital Cost Calculations
Capital cost is dependent upon the RO membrane area, \(A_{mem}\), as shown in the equations below.
\[C_{cap,tot} = A_{mem} * C_{mem}\]
Operating Cost Calculations
There are no operating costs unique to the RO unit.