###############################################################################
# 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 membrane evaporation.
"""
from pyomo.environ import Var, units as pyunits
from idaes.core import declare_process_block_class
from watertap.core import build_sido, constant_intensity, ZeroOrderBaseData
# Some more information about this module
__author__ = "Travis Arnold"
[docs]@declare_process_block_class("MembraneEvaporatorZO")
class MembraneEvaporatorData(ZeroOrderBaseData):
"""
Zero-Order model for a membrane evaporator.
"""
CONFIG = ZeroOrderBaseData.CONFIG()
[docs] def build(self):
super().build()
self._tech_type = "membrane_evaporator"
build_sido(self)
constant_intensity(self)
# Create water flux variable
self.water_flux = Var(
units=pyunits.m / pyunits.hr,
bounds=(0, None),
doc="Water flux through membrane",
)
self._perf_var_dict["Water Flux"] = self.water_flux
self._fixed_perf_vars.append(self.water_flux)
# Create membrane area variable
self.membrane_area = Var(
units=pyunits.m**2, bounds=(0, None), doc="Membrane area"
)
self._perf_var_dict["Membrane Area"] = self.membrane_area
@self.Constraint(self.flowsheet().time, doc="Constraint for water flux.")
def wat_flux(b, t):
return b.properties_byproduct[t].flow_vol == (
pyunits.convert(
b.water_flux * b.membrane_area, to_units=pyunits.m**3 / pyunits.s
)
)