Heat Exchanger Costing Method
Costing Method Parameters
The following parameters are constructed for the unit on the FlowsheetCostingBlock (e.g., m.fs.costing.heat_exchanger) when applying the cost_heat_exchanger costing method in the watertap_costing_package:
Description |
Symbol |
Parameter Name |
Default Value |
Units |
|---|---|---|---|---|
Heat exchanger unit cost |
\(C_{hx}\) |
|
300 |
\(\text{USD}_{2020}\) |
Material factor cost |
\(f_{m}\) |
|
1 |
\(\text{dimensionless}\) |
Steam cost per kg |
\(C_{steam}\) |
|
0.008 |
\(\text{USD}_{2018}/\text{kg}\) |
Costing Method Variables
The following variables are used on the unit block (e.g., m.fs.unit.costing) when applying the cost_heat_exchanger costing method in the watertap_costing_package:
Description |
Symbol |
Variable Name |
Index |
Units |
|---|---|---|---|---|
Heat exchanger area |
\(A_{hx}\) |
|
None |
\(\text{m}^2\) |
Capital Cost Calculations
The capital cost is dependent on the heat exchanger area, \(A\), and the material factor, \(f_{m}\), as shown in the equation below.
\[C_{cap, tot} = C_{hx} \cdot f_{m} \cdot A_{hx}\]
Operating Cost Calculations
The operating cost includes the cost of steam when the heat exchanger is used as a steam heater. The steam consumption operating cost is calculated as: