def model(self):
m = ConcreteModel()
m.fs = FlowsheetBlock(default={"dynamic": False})
m.fs.water_props = WaterParameterBlock(
default={"solute_list": ["A", "B", "C"]})
m.fs.unit = DerivedZO(default={"property_package": m.fs.water_props})
m.fs.unit.flow = Param(m.fs.time,
initialize=1,
units=pyunits.gallon / pyunits.minute)
pump_electricity(m.fs.unit, m.fs.unit.flow)
return m
def build(self):
super().build()
self._tech_type = "surface_discharge"
build_pt(self)
self._Q = Reference(self.properties[:].flow_vol)
pump_electricity(self, self._Q)
self.pipe_distance = Var(self.flowsheet().config.time,
units=pyunits.miles,
doc="Piping distance")
self.pipe_diameter = Var(self.flowsheet().config.time,
units=pyunits.inches,
doc="Pipe diameter")
self._fixed_perf_vars.append(self.pipe_distance)
self._fixed_perf_vars.append(self.pipe_diameter)
self._perf_var_dict["Pipe Distance"] = self.pipe_distance
self._perf_var_dict["Pipe Diameter"] = self.pipe_diameter
def build(self):
super().build()
self._tech_type = "ion_exchange"
build_sido(self)
self._Q = Reference(self.properties_in[:].flow_vol)
pump_electricity(self, self._Q)
# mutable parameter; default value found in WT3 for anion exchange
self.eta_pump.set_value(0.8)
# mutable parameter; default value of 2 bar converted to feet head
self.lift_height.set_value(69.91052 * pyunits.feet)
# Add variables and constraints for material requirements
self.NaCl_flowrate = Var(
self.flowsheet().time,
initialize=1,
units=pyunits.kg / pyunits.s,
bounds=(0, None),
doc="Flowrate of NaCl addition",
)
self.NaCl_dose = Var(
units=pyunits.kg / pyunits.m**3,
bounds=(0, None),
doc="Dosage of NaCl addition",
)
self._fixed_perf_vars.append(self.NaCl_dose)
self._perf_var_dict["NaCl Addition"] = self.NaCl_flowrate
@self.Constraint(self.flowsheet().time)
def NaCl_constraint(blk, t):
return blk.NaCl_flowrate[t] == blk.NaCl_dose * blk.properties_in[t].flow_vol
self.resin_demand = Var(
self.flowsheet().time,
initialize=1,
units=pyunits.kg / pyunits.s,
bounds=(0, None),
doc="Replacement rate of ion exchange resin",
)
self.resin_replacement = Var(
units=pyunits.kg / pyunits.m**3,
bounds=(0, None),
doc="Resin replacement as a function of flow",
)
self._fixed_perf_vars.append(self.resin_replacement)
self._perf_var_dict["Resin Demand"] = self.resin_demand
@self.Constraint(self.flowsheet().time)
def resin_constraint(blk, t):
return (
blk.resin_demand[t]
== blk.resin_replacement * blk.properties_in[t].flow_vol
)
if self.config.process_subtype == "clinoptilolite":
if "ammonium_as_nitrogen" in self.config.property_package.solute_set:
self.nitrogen_clay_ratio = Var(
self.flowsheet().config.time,
units=pyunits.dimensionless,
doc="Mass fraction of nitrogen in clay mixture",
)
self._fixed_perf_vars.append(self.nitrogen_clay_ratio)
self.final_solids_mass = Var(
self.flowsheet().config.time,
units=pyunits.kg / pyunits.s,
doc="Solids mass flow in byproduct stream",
)
@self.Constraint(
self.flowsheet().time,
doc="Solids mass flow in byproduct stream constraint",
)
def solids_mass_flow_constraint(b, t):
return (
b.final_solids_mass[t]
== b.properties_byproduct[t].flow_mass_comp[
"ammonium_as_nitrogen"
]
/ b.nitrogen_clay_ratio[t]
)
self._perf_var_dict[
"Nitrogen-Clay Mixture Ratio (kg/kg)"
] = self.nitrogen_clay_ratio
self._perf_var_dict[
"Final mass flow of clay and nitrogen (kg/s)"
] = self.final_solids_mass
else:
raise KeyError(
"ammonium_as_nitrogen should be defined in solute_list for this subtype."
)
def build(self):
super().build()
self._tech_type = "gas_sparged_membrane"
self._has_recovery_removal = True
self._initialize = initialize_sido
self._scaling = calculate_scaling_factors_gas_extraction
# Create state blocks for inlet and outlets
tmp_dict = dict(**self.config.property_package_args)
tmp_dict["has_phase_equilibrium"] = False
tmp_dict["defined_state"] = True
self.properties_in = self.config.property_package.build_state_block(
self.flowsheet().time,
doc="Material properties at inlet",
default=tmp_dict)
tmp_dict_2 = dict(**tmp_dict)
tmp_dict_2["defined_state"] = False
self.properties_treated = self.config.property_package.build_state_block(
self.flowsheet().time,
doc="Material properties of treated water",
default=tmp_dict_2,
)
self.properties_byproduct = self.config.property_package.build_state_block(
self.flowsheet().time,
doc="Material properties of byproduct stream",
default=tmp_dict_2,
)
# Create Ports
self.add_port("inlet", self.properties_in, doc="Inlet port")
self.add_port("treated",
self.properties_treated,
doc="Treated water outlet port")
self.add_port("byproduct",
self.properties_byproduct,
doc="Byproduct outlet port")
# Add performance variables
self.recovery_frac_mass_H2O = Var(
self.flowsheet().time,
initialize=0.8,
domain=NonNegativeReals,
units=pyunits.dimensionless,
bounds=(1e-8, 1.0000001),
doc="Mass recovery fraction of water in the treated stream",
)
self.removal_frac_mass_solute = Var(
self.flowsheet().time,
self.config.property_package.solute_set,
domain=NonNegativeReals,
initialize=0.01,
units=pyunits.dimensionless,
doc="Solute removal fraction on a mass basis",
)
self.gas_mass_influent_ratio = Var(
self.flowsheet().time,
domain=NonNegativeReals,
units=pyunits.dimensionless,
doc="Mass flow of gas extracted per mass flow of influent",
)
self.flow_mass_gas_extraction = Var(
self.flowsheet().time,
domain=NonNegativeReals,
units=pyunits.kg / pyunits.s,
doc="Mass flow of hydrogen extracted",
)
self._fixed_perf_vars.append(self.gas_mass_influent_ratio)
self._perf_var_dict[
"Mass of gas extracted per mass flow of influent(kg/d/(kg/d)"] = self.gas_mass_influent_ratio
self._perf_var_dict[
"Mass flow of gas extracted (kg/s))"] = self.flow_mass_gas_extraction
# Add performance constraints
# Water recovery
@self.Constraint(self.flowsheet().time, doc="Water recovery equation")
def water_recovery_equation(b, t):
return (b.recovery_frac_mass_H2O[t] *
b.properties_in[t].flow_mass_comp["H2O"] ==
b.properties_treated[t].flow_mass_comp["H2O"])
# Flow balance
@self.Constraint(self.flowsheet().time, doc="Overall flow balance")
def mass_balance(b, t):
return (sum(
b.properties_in[t].flow_mass_comp[j]
for j in self.config.property_package.component_list) == sum(
b.properties_treated[t].flow_mass_comp[j]
for j in self.config.property_package.component_list) +
sum(b.properties_byproduct[t].flow_mass_comp[j]
for j in self.config.property_package.component_list) +
b.flow_mass_gas_extraction[t])
# Gas extraction
@self.Constraint(self.flowsheet().time, doc="Gas extraction equation")
def mass_gas_extraction_equation(b, t):
return b.flow_mass_gas_extraction[t] == b.gas_mass_influent_ratio[
t] * sum(b.properties_in[t].flow_mass_comp[j]
for j in self.config.property_package.component_list)
# Solute removal
@self.Constraint(
self.flowsheet().time,
self.config.property_package.solute_set,
doc="Solute removal equations",
)
def solute_removal_equation(b, t, j):
return (b.removal_frac_mass_solute[t, j] *
b.properties_in[t].flow_mass_comp[j] ==
b.properties_byproduct[t].flow_mass_comp[j])
# Solute concentration of treated stream
@self.Constraint(
self.flowsheet().time,
self.config.property_package.solute_set,
doc="Constraint for solute concentration in treated "
"stream.",
)
def solute_treated_equation(b, t, j):
return (1 - b.removal_frac_mass_solute[t, j]
) * b.properties_in[t].flow_mass_comp[
j] == b.properties_treated[t].flow_mass_comp[j]
self._stream_table_dict = {
"Inlet": self.inlet,
"Treated": self.treated,
"Byproduct": self.byproduct,
}
self._perf_var_dict["Water Recovery"] = self.recovery_frac_mass_H2O
self._perf_var_dict["Solute Removal"] = self.removal_frac_mass_solute
self._get_Q = _get_Q_gas_extraction
self._Q = Reference(self.properties_in[:].flow_vol)
pump_electricity(self, self._Q)