Evaporation Pond (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
Electricity consumption is calculated using the constant_intensity helper function. See documentation for Helper Methods for Electricity Demand.
Costing Method
Costing is calculated using the cost_evaporation_pond method in the zero-order costing package. See documentation for the zero-order costing package.
Additional Variables
Description |
Variable Name |
Units |
---|---|---|
Air temperature |
air_temperature |
\(K\) |
Daily solar radiation incident |
solar_radiation |
\(mJ/m^2\) |
Pond dike height |
dike_height |
\(ft\) |
Factor to adjust evaporation rate of pure water |
evaporation_rate_adj_factor |
\(dimensionless\) |
Evaporation rate calculation parameter A |
evap_rate_calc_a_parameter |
\(mm/d\) |
Evaporation rate calculation parameter B |
evap_rate_calc_b_parameter |
\(m^2/mJ\) |
Evaporation rate calculation parameter C |
evap_rate_calc_c_parameter |
\(m^2/mJ\) |
Adjusted area calculation parameter A |
adj_area_calc_a_parameter |
\(acre\) |
Adjusted area calculation parameter B |
adj_area_calc_b_parameter |
\(dimensionless\) |
Pond area needed based on evaporation rate |
area |
\(acre\) |
Adjusted pond area needed |
adj_area |
\(acre\) |
Calculated evaporation rate of pure water |
evaporation_rate_pure |
\(mm/d\) |
Pure water evaporation rate adjusted for salinity |
evaporation_rate_salt |
\(gal/acre/min\) |
Additional Constraints
Description |
Constraint Name |
---|---|
Evaporation rate of pure water constraint |
evap_rate_pure_constraint |
Adjusted evaporation rate for salinity constraint |
evap_rate_salt_constraint |
Base area constraint |
area_constraint |
Adjusted area constraint |
area_adj_constraint |
Class Documentation
This module contains a zero-order representation of an evaporation pond unit model.
- class watertap.unit_models.zero_order.evaporation_pond_zo.EvaporationPondZO(*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
(EvaporationPondZO) New instance
- class watertap.unit_models.zero_order.evaporation_pond_zo.EvaporationPondZOData(component)[source]
Zero-Order model for a evaporation pond unit.
- 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