Steam Ejector 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 |
|---|---|---|---|---|
Base cost coefficient for steam ejector |
\(C_{base}\) |
|
1949 |
\(\text{USD}_{2020}\) |
Cost scaling exponent |
\(C_{exponent}\) |
|
0.3 |
\(\text{dimensionless}\) |
Steam cost |
\(C_{steam}\) |
|
0.008 |
\(\text{USD}_{2018}\text{/kg}\) |
Costing Method Variables
There are no costing method variables unique to the steam ejector.
Capital Cost Calculations
Capital cost is dependent upon the steam and entrained vapor mass flow, \(Q\), as shown in the equation below.
\[C_{cap,tot} = C_{base} * (Q_{steam} + Q_{entrained vapor}^{C_{exponent}}\]
Operating Cost Calculations
The only operating cost associated with this steam ejector model is the cost of steam, which is a function of the steam cost (on a mass basis), \(C_{steam}\), and the mass flow of steam, \(Q_{steam}\), as shown in the equation below:
\[C_{op, tot} = C_{steam} * Q_{steam}\]