Osmotically Assisted Reverse Osmosis Costing Method
Costing Method Parameters
The following parameters are constructed for the unit on the FlowsheetCostingBlock (e.g., m.fs.costing.osmotically_assisted_reverse_osmosis) when applying the cost_osmotically_assisted_reverse_osmosis costing method in the watertap_costing_package:
Description |
Symbol |
Parameter Name |
Default Value |
Units |
|---|---|---|---|---|
Membrane replacement factor |
\(f\) |
|
0.15 |
\(\text{dimensionless}\) |
Membrane cost |
\(C_A\) |
|
30 |
\(\text{USD}_{2018}\text{/m}^2\) |
High pressure membrane cost |
\(C_hA\) |
|
50 |
\(\text{USD}_{2018}\text{/m}^2\) |
Costing Method Variables
The following variables are used on the unit block (e.g., m.fs.unit.costing) when applying the cost_osmotically_assisted_reverse_osmosis costing method in the watertap_costing_package:
Description |
Symbol |
Variable Name |
Index |
Units |
|---|---|---|---|---|
Membrane area |
\(A\) |
|
None |
\(\text{m}^2\) |
Capital Cost Calculations
There are two classes of OARO costing types (standard and high_pressure), the membrane cost is different with these two
methods and the default costing method is standard.
For standard type, the capital cost is defineds as:
\[C_{cap,tot} = C_A * A\]
For high_pressure type, the capital cost is defineds as:
\[C_{cap,tot} = C_hA * A\]
Operating Cost Calculations
The fixed operating cost is correlated to OARO costing types (standard and high_pressure) and the default is standard.
For standard type, the capital cost is defineds as:
\[C_{op,tot} = f * C_A * A\]
For high_pressure type, the capital cost is defineds as:
\[C_{op,example1} = f * C_A * A\]
Code Documentation
References
Bartholomew, T. V., Mey, L., Arena, J. T., Siefert, N. S., & Mauter, M. S. (2017). Osmotically assisted reverse osmosis for high salinity brine treatment. Desalination, 421, 3-11.