###############################################################################
# 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/"
#
###############################################################################
"""
This module contains a zero-order representation of a nanofiltration unit
operation.
"""
from idaes.core import declare_process_block_class
from pyomo.environ import Var, units as pyunits
from watertap.core import build_sido, constant_intensity, ZeroOrderBaseData
# Some more information about this module
__author__ = "Andrew Lee, Adam Atia"
[docs]@declare_process_block_class("NanofiltrationZO")
class NanofiltrationZOData(ZeroOrderBaseData):
"""
Zero-Order model for a Nanofiltration unit operation.
"""
CONFIG = ZeroOrderBaseData.CONFIG()
[docs] def build(self):
super().build()
self._tech_type = "nanofiltration"
build_sido(self)
if (
self.config.process_subtype == "default"
or self.config.process_subtype is None
):
constant_intensity(self)
else:
self.rejection_comp = Var(
self.flowsheet().time,
self.config.property_package.config.solute_list,
units=pyunits.dimensionless,
doc="Component rejection",
)
self.water_permeability_coefficient = Var(
self.flowsheet().time,
units=pyunits.L / pyunits.m**2 / pyunits.hour / pyunits.bar,
doc="Membrane water permeability coefficient, A",
)
self.applied_pressure = Var(
self.flowsheet().time,
units=pyunits.bar,
doc="Net driving pressure across membrane",
)
self.area = Var(units=pyunits.m**2, doc="Membrane area")
self._fixed_perf_vars.append(self.applied_pressure)
self._fixed_perf_vars.append(self.water_permeability_coefficient)
@self.Constraint(self.flowsheet().time, doc="Water permeance constraint")
def water_permeance_constraint(b, t):
return b.properties_treated[t].flow_vol == pyunits.convert(
b.water_permeability_coefficient[t]
* b.area
* b.applied_pressure[t],
to_units=pyunits.m**3 / pyunits.s,
)
@self.Constraint(
self.flowsheet().time,
self.config.property_package.config.solute_list,
doc="Solute [observed] rejection constraint",
)
def rejection_constraint(b, t, j):
return (
b.rejection_comp[t, j]
== 1
- b.properties_treated[t].conc_mass_comp[j]
/ b.properties_in[t].conc_mass_comp[j]
)
self._perf_var_dict["Membrane Area (m^2)"] = self.area
self._perf_var_dict["Net Driving Pressure (bar)"] = self.applied_pressure
self._perf_var_dict[
"Water Permeability Coefficient (LMH/bar)"
] = self.water_permeability_coefficient
self._perf_var_dict[f"Rejection"] = self.rejection_comp