pair: watertap.core.zero_order_siso;build_siso
watertap.core.zero_order_siso
The build_siso method is intended to be used to rapidly construct a standard set of material balance equations for zero-order type models with a single inlet and single outlet.
from idaes.core import declare_process_block_class from watertap.core import build_siso, ZeroOrderBaseData
@declare_process_block_class("UVZO") class UVZOData(ZeroOrderBaseData):
CONFIG = ZeroOrderBaseData.CONFIG()
- def build(self):
super().build()
self._tech_type = "uv"
build_siso(self)
The build_siso method constructs a simple representation of unit operation with one inlet (named inlet) and one outlet (named treated). A StateBlock is constructed for each inlet and outlet with an associated Port.
The build_siso method creates the following variables in addition to those created by the StateBlocks.
| Variable | Name | Indices | Notes |
|---|---|---|---|
| rt | recovery_frac_mass_H2O | time | Fraction of mass flow of water in inlet that goes to treated stream. |
| ft, j | removal_frac_mass_comp | time, component | Fraction of mass flow of each component that is removed from the inlet stream. |
recovery_frac_mass_H2O is intended to be fixed to 1 (e.g., UV reactor which yields product stream without water losses), but the user can optionally set this to some fraction.
The build_siso method writes the following constraints which relate the inlet state to the treated stream. First, a water recovery equation is written for water to relate the flowrate at the treated outlet to that at the inlet:
`water_recovery_equation(t)`:
rt × Minlet, t, H2O = Mtreated, t, H2O
where Mt, H2O is mass flowrate of water at time t.
Note, a mass balance for water is ignored since build_siso is intended to only account for constituent removal/conversion at the treated outlet. Thus, a mass balance constraint is only written for each solute.
`solute_treated_equation(t, j)`:
(1 − ft, j) × Minlet, t, j = Mtreated, t, j
watertap.core.zero_order_siso