Granular Activated Carbon (ZO)
Model Type
This unit model is formulated as a single-input, double-output model form. See documentation for single-input, double-output Helper Methods.
Electricity Consumption
The constraint used to calculate energy consumption is described in the Additional Constraints section below. More details can be found in the unit model class.
Costing Method
Costing is calculated using the cost_gac method in the zero-order costing package. See documentation for the zero-order costing package.
Additional Variables
Description |
Variable Name |
Units |
|---|---|---|
Empty bed contact time of unit |
empty_bed_contact_time |
\(hr\) |
Electricity consumption of unit |
electricity |
\(kW\) |
Parameter for calculating electricity based on empty bed contact time |
electricity_intensity_parameter |
\(kW/m^3\) |
Electricity intensity with respect to inlet flowrate of unit |
energy_electric_flow_vol_inlet |
\(kWh/m^3\) |
Replacement rate of activated carbon |
activated_carbon_replacement |
\(kg/m^3\) |
Demand for activated carbon |
activated_carbon_demand |
\(kg/hr\) |
Additional Constraints
Description |
Constraint Name |
|---|---|
Electricity intensity based on empty bed contact time. |
electricity_intensity_constraint |
Constraint for electricity consumption based on feed flowrate. |
electricity_consumption |
Constraint for activated carbon consumption. |
activated_carbon_equation |
Class Documentation
This module contains a zero-order representation of a granular activated carbon unit operation.
- class watertap.unit_models.zero_order.gac_zo.GACZO(*args, **kwds)
- Parameters
rule (function) – A rule function or None. Default rule calls build().
concrete (bool) – If True, make this a toplevel model. Default - False.
ctype (class) –
Pyomo ctype of the block. Default - pyomo.environ.Block
- Config args
- dynamic
All zero-order models are steady-state only
- has_holdup
Zero order models do not include holdup
- property_package
Property parameter object used to define property calculations, default - useDefault. Valid values: { useDefault - use default package from parent model or flowsheet, PhysicalParameterObject - a PhysicalParameterBlock object.}
- property_package_args
A ConfigBlock with arguments to be passed to a property block(s) and used when constructing these, default - None. Valid values: {see property package for documentation.}
- database
An instance of a WaterTAP Database to use for parameters.
- process_subtype
Process subtype to use when looking up parameters from database.
initialize (dict) – ProcessBlockData config for individual elements. Keys are BlockData indexes and values are dictionaries with config arguments as keys.
idx_map (function) – Function to take the index of a BlockData element and return the index in the initialize dict from which to read arguments. This can be provided to override the default behavior of matching the BlockData index exactly to the index in initialize.
- Returns
(GACZO) New instance
- class watertap.unit_models.zero_order.gac_zo.GACZOData(component)[source]
Zero-Order model for a granular activated carbon unit operation.
- build()[source]
General build method for UnitModelBlockData. This method calls a number of sub-methods which automate the construction of expected attributes of unit models.
Inheriting models should call super().build.
- Parameters
None –
- Returns
None