Component Class

This is a general purpose Component object, and is suitable for general cases where the user is not concerned about distinguishing solutes from solvents (is_solute() and is_solvent() will both raise TypeErrors). This also forms the base class for all other Component types.

class idaes.core.components.Component(*args, **kwargs)
Parameters:
  • rule (function) – A rule function or None. Default rule calls build().
  • concrete (bool) – If True, make this a toplevel model. Default - False.
  • ctype (str) – Pyomo ctype of the block. Default - “Block”
  • default (dict) –

    Default ProcessBlockData config

    Keys
    valid_phase_types
    List of valid PhaseTypes (Enums) for this Component.
    elemental_composition
    Dict containing elemental composition in the form element : stoichiometry
    henry_component
    Dict indicating phases in which component follows Herny’s Law (keys) with values indicating form of law.
    dens_mol_liq_comp
    Method to use to calculate liquid phase molar density
    enth_mol_liq_comp
    Method to calculate liquid component molar enthalpies
    enth_mol_ig_comp
    Method to calculate ideal gas component molar enthalpies
    entr_mol_liq_comp
    Method to calculate liquid component molar entropies
    entr_mol_ig_comp
    Method to calculate ideal gas component molar entropies
    pressure_sat_comp
    Method to use to calculate saturation pressure
    phase_equilibrium_form
    Form of phase equilibrium constraints for component
    parameter_data
    Dict containing initialization data for parameters
    _component_list_exists
    Internal config argument indicating whether component_list needs to be populated.
  • initialize (dict) – ProcessBlockData config for individual elements. Keys are BlockData indexes and values are dictionaries described under the “default” argument above.
  • 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 overide the default behavior of matching the BlockData index exactly to the index in initialize.
Returns:

(Component) New instance

Solute Class

The component object is suitable for species which should be treated as solutes in a LiquidPhase. The only difference between this and a general Component is that is_solute() returns True and is_solvent() returns False.

Solvent Class

The component object is suitable for species which should be treated as solvents in a LiquidPhase. The only difference between this and a general Component is that is_solute() returns False and is_solvent() returns True.

Ion Class

The Ion class is suitable for ionic species which appear in LiquidPhases. This is similar to the Solute class, in that is_solute() returns True and is_solvent() returns False. Additionally, Ion objects have a charge configuration argument for recording the charge on the ion (must be an integer) and do not have a valid_phase_types argument (as it is assumed they can only exist in LiquidPhases).

Note

Users are encouraged to use the Anion and Cation classes instead of the generic Ion class, as these validate that sign of the charge configuration argument.

Anion Class

The Anion class is suitable for anionic species (i.e. negatively charged) which appear in LiquidPhases. This is a subclass of Ion, which enforces that the sign on the charge configuration argument be negative.

Cation Class

The Cation class is suitable for cationic species (i.e. positively charged) which appear in LiquidPhases. This is a subclass of Ion, which enforces that the sign on the charge configuration argument be positive.