Water Pumping Station (ZO)

Model Type

This unit model is formulated as a pass-through model form. See documentation for pass-through 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_power_law_flow() method. For full details on costing, see documentation for the zero-order costing package.

Additional Variables

Description

Variable Name

Units

Electricity consumption of unit

electricity

\(kW\)

Lift height for pump

lift_height

\(ft\)

Efficiency of pump

eta_pump

\(dimensionless\)

Efficiency of motor

eta_motor

\(dimensionless\)

Additional Constraints

Description

Constraint Name

Constraint for electricity consumption based on pump flowrate.

electricity_consumption

Class Documentation

This module contains a zero-order representation of a water pumping station.

class watertap.unit_models.zero_order.water_pumping_station_zo.WaterPumpingStationZO(*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.

    isothermal

    Isothermal assumption, or ignore temperature variables in unit. Default=True

    isobaric

    Isobaric assumption, or ignore pressure variables in unit. Default=True

    fix_pump_power

    Indicates whether pump power should be fixed by the user or not. default - True. Valid values: { True - pump power (variable name “electricity”) will be fixed by user and lift_height will not be fixed, False - pump power (variable name “electricity”) is left unfixed and lift_height will be fixed,}

  • 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:

(WaterPumpingStationZO) New instance

class watertap.unit_models.zero_order.water_pumping_station_zo.WaterPumpingStationZOData(component)[source]

Zero-Order model for SW onshore intake 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