Anaerobic Digester Costing Method
Costing Method Parameters
The following parameters are constructed for the unit on the FlowsheetCostingBlock (e.g., m.fs.costing.anaerobic_digester) when applying the cost_anaerobic_digester costing method in the watertap_costing_package:
Description |
Symbol |
Parameter Name |
Default Value |
Units |
|---|---|---|---|---|
Capital cost A parameter \(^1\) |
\(A\) |
|
19.3552312e6 |
\(\text{USD}_{2012}\) |
Capital cost B parameter \(^1\) |
\(B\) |
|
0.6 |
\(\text{dimensionless}\) |
Reference flow \(^1\) |
\(F_r\) |
|
911.054 |
\(m^3/h\) |
Costing Method Variables
There are no costing method variables unique to the anaerobic digester.
Capital Cost Calculations
Capital cost is dependent upon the unit’s volumetric flowrate, \(F\), as shown in the equation below.
\[C_{cap,tot} = A * (F/F_r)^{B}\]
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 anaerobic digester), 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] Eberle, Annika, Irina Tsiryapkina, Steve Peterson, Laura Vimmerstedt, Dylan Hettinger, and Daniel Inman. 2020. An Overview of the Waste-to-Energy System Simulation (WESyS) Model. Golden, CO: National Renewable Energy Laboratory. NREL/TP-6A20-77166. https://www.nrel.gov/docs/fy21osti/77166.pdf.