###############################################################################
# WaterTAP Copyright (c) 2021, The Regents of the University of California,
# through Lawrence Berkeley National Laboratory, Oak Ridge National
# Laboratory, National Renewable Energy Laboratory, and National Energy
# Technology Laboratory (subject to receipt of any required approvals from
# the U.S. Dept. of Energy). All rights reserved.
#
# Please see the files COPYRIGHT.md and LICENSE.md for full copyright and license
# information, respectively. These files are also available online at the URL
# "https://github.com/watertap-org/watertap/"
#
###############################################################################
"""Zero order nanofiltration model based on specifying solvent flux and solute rejection"""
from pyomo.environ import ConcreteModel, Constraint
from idaes.core import FlowsheetBlock
from watertap.unit_models.nanofiltration_ZO import NanofiltrationZO
from idaes.core.util.scaling import (
calculate_scaling_factors,
constraint_scaling_transform,
)
from watertap.examples.flowsheets.full_treatment_train.model_components import (
property_models,
)
from watertap.examples.flowsheets.full_treatment_train.util import (
solve_block,
check_dof,
)
[docs]def build_ZONF(m, base="ion"):
"""
Builds a ZONF model based on specified rejection and solvent flux.
Requires prop_ion property package.
"""
if base not in ["ion"]:
raise ValueError(
"Unexpected property base {base} for build_ZONF" "".format(base=base)
)
prop = property_models.get_prop(m, base=base)
m.fs.NF = NanofiltrationZO(property_package=prop, has_pressure_change=False)
# specify
m.fs.NF.flux_vol_solvent.fix(1.67e-6)
m.fs.NF.area.fix(500)
m.fs.NF.properties_permeate[0].pressure.fix(101325)
m.fs.NF.rejection_phase_comp[0, "Liq", "Na"].fix(0.01)
m.fs.NF.rejection_phase_comp[0, "Liq", "Ca"].fix(0.79)
m.fs.NF.rejection_phase_comp[0, "Liq", "Mg"].fix(0.94)
m.fs.NF.rejection_phase_comp[0, "Liq", "SO4"].fix(0.87)
m.fs.NF.rejection_phase_comp[
0, "Liq", "Cl"
] = 0.15 # guess, but electroneutrality enforced below
charge_comp = {"Na": 1, "Ca": 2, "Mg": 2, "SO4": -2, "Cl": -1}
m.fs.NF.eq_electroneutrality = Constraint(
expr=0
== sum(
charge_comp[j]
* m.fs.NF.feed_side.properties_out[0].conc_mol_phase_comp["Liq", j]
for j in charge_comp
)
)
constraint_scaling_transform(m.fs.NF.eq_electroneutrality, 1)
def solve_ZONF(base="ion"):
m = ConcreteModel()
m.fs = FlowsheetBlock(dynamic=False)
property_models.build_prop(m, base=base)
build_ZONF(m, base=base)
property_models.specify_feed(m.fs.NF.feed_side.properties_in[0], base="ion")
check_dof(m)
calculate_scaling_factors(m)
solve_block(m)
m.fs.NF.inlet.display()
m.fs.NF.permeate.display()
m.fs.NF.retentate.display()
return m
if __name__ == "__main__":
solve_ZONF(base="ion")