def iron_oc(self):
m = ConcreteModel()
m.fs = FlowsheetBlock(default={"dynamic": False})
# Set up thermo props and reaction props
m.fs.gas_properties = GasPhaseThermoParameterBlock()
m.fs.solid_properties = SolidPhaseThermoParameterBlock()
m.fs.hetero_reactions = HeteroReactionParameterBlock(
default={
"solid_property_package": m.fs.solid_properties,
"gas_property_package": m.fs.gas_properties
})
m.fs.unit = MBR(
default={
"energy_balance_type": EnergyBalanceType.none,
"gas_phase_config": {
"property_package": m.fs.gas_properties
},
"solid_phase_config": {
"property_package": m.fs.solid_properties,
"reaction_package": m.fs.hetero_reactions
}
})
return m
def test_config():
m = ConcreteModel()
m.fs = FlowsheetBlock(default={"dynamic": False})
# Set up thermo props and reaction props
m.fs.gas_properties = GasPhaseParameterBlock()
m.fs.solid_properties = SolidPhaseParameterBlock()
m.fs.hetero_reactions = HeteroReactionParameterBlock(
default={
"solid_property_package": m.fs.solid_properties,
"gas_property_package": m.fs.gas_properties
})
m.fs.unit = MBR(
default={
"gas_phase_config": {
"property_package": m.fs.gas_properties
},
"solid_phase_config": {
"property_package": m.fs.solid_properties,
"reaction_package": m.fs.hetero_reactions
}
})
# Check unit config arguments
assert len(m.fs.unit.config) == 15
assert isinstance(m.fs.unit.config.gas_phase_config, ConfigBlock)
assert isinstance(m.fs.unit.config.solid_phase_config, ConfigBlock)
assert m.fs.unit.config.finite_elements == 10
assert m.fs.unit.config.length_domain_set == [0.0, 1.0]
assert m.fs.unit.config.transformation_method == "dae.finite_difference"
assert m.fs.unit.config.transformation_scheme == 'BACKWARD'
assert m.fs.unit.config.collocation_points == 3
assert m.fs.unit.config.flow_type == "counter_current"
assert m.fs.unit.config.material_balance_type == \
MaterialBalanceType.componentTotal
assert m.fs.unit.config.energy_balance_type == \
EnergyBalanceType.enthalpyTotal
assert m.fs.unit.config.momentum_balance_type == \
MomentumBalanceType.pressureTotal
assert m.fs.unit.config.has_pressure_change is True
# Check gas phase config arguments
assert len(m.fs.unit.config.gas_phase_config) == 7
assert m.fs.unit.config.gas_phase_config.has_equilibrium_reactions is False
assert m.fs.unit.config.gas_phase_config.property_package is \
m.fs.gas_properties
assert m.fs.unit.config.gas_phase_config.reaction_package is None
# Check solid phase config arguments
assert len(m.fs.unit.config.solid_phase_config) == 7
assert m.fs.unit.config.solid_phase_config.has_equilibrium_reactions is \
False
assert m.fs.unit.config.solid_phase_config.property_package is \
m.fs.solid_properties
assert m.fs.unit.config.solid_phase_config.reaction_package is \
m.fs.hetero_reactions
def iron_oc(self):
m = ConcreteModel()
m.fs = FlowsheetBlock(default={"dynamic": False})
# Set up thermo props and reaction props
m.fs.gas_properties = GasPhaseParameterBlock()
m.fs.solid_properties = SolidPhaseParameterBlock()
m.fs.hetero_reactions = HeteroReactionParameterBlock(
default={
"solid_property_package": m.fs.solid_properties,
"gas_property_package": m.fs.gas_properties
})
m.fs.unit = MBR(
default={
"energy_balance_type": EnergyBalanceType.none,
"gas_phase_config": {
"property_package": m.fs.gas_properties
},
"solid_phase_config": {
"property_package": m.fs.solid_properties,
"reaction_package": m.fs.hetero_reactions
}
})
# Fix geometry variables
m.fs.unit.bed_diameter.fix(6.5) # m
m.fs.unit.bed_height.fix(5) # m
# Fix inlet port variables for gas and solid
m.fs.unit.gas_inlet.flow_mol[0].fix(128.20513) # mol/s
m.fs.unit.gas_inlet.temperature[0].fix(1183.15) # K
m.fs.unit.gas_inlet.pressure[0].fix(2.00) # bar
m.fs.unit.gas_inlet.mole_frac_comp[0, "CO2"].fix(0.02499)
m.fs.unit.gas_inlet.mole_frac_comp[0, "H2O"].fix(0.00001)
m.fs.unit.gas_inlet.mole_frac_comp[0, "CH4"].fix(0.975)
m.fs.unit.solid_inlet.flow_mass[0].fix(591.4) # kg/s
m.fs.unit.solid_inlet.temperature[0].fix(1183.15) # K
m.fs.unit.solid_inlet.particle_porosity[0].fix(0.27) # (-)
m.fs.unit.solid_inlet.mass_frac_comp[0, "Fe2O3"].fix(0.45)
m.fs.unit.solid_inlet.mass_frac_comp[0, "Fe3O4"].fix(1e-9)
m.fs.unit.solid_inlet.mass_frac_comp[0, "Al2O3"].fix(0.55)
return m
def main():
m = ConcreteModel()
m.fs = FlowsheetBlock(default={"dynamic": False})
# Set up thermo props and reaction props
m.fs.gas_properties = GasPhaseThermoParameterBlock()
m.fs.solid_properties = SolidPhaseThermoParameterBlock()
m.fs.hetero_reactions = HeteroReactionParameterBlock(
default={
"solid_property_package": m.fs.solid_properties,
"gas_property_package": m.fs.gas_properties
})
m.fs.MB = MBR(
default={
"transformation_method": "dae.collocation",
"gas_phase_config": {
"property_package": m.fs.gas_properties
},
"solid_phase_config": {
"property_package": m.fs.solid_properties,
"reaction_package": m.fs.hetero_reactions
}
})
# Fix bed geometry variables
m.fs.MB.bed_diameter.fix(6.5) # m
m.fs.MB.bed_height.fix(5) # m
# Fix inlet port variables for gas and solid
m.fs.MB.gas_inlet.flow_mol[0].fix(128.20513) # mol/s
m.fs.MB.gas_inlet.temperature[0].fix(298.15) # K
m.fs.MB.gas_inlet.pressure[0].fix(2.00) # bar
m.fs.MB.gas_inlet.mole_frac_comp[0, "CO2"].fix(0.02499)
m.fs.MB.gas_inlet.mole_frac_comp[0, "H2O"].fix(0.00001)
m.fs.MB.gas_inlet.mole_frac_comp[0, "CH4"].fix(0.975)
m.fs.MB.solid_inlet.flow_mass[0].fix(591.4) # kg/s
# Particle porosity:
# The porosity of the OC particle at the inlet is calculated from the
# known bulk density of the fresh OC particle (3251.75 kg/m3), and the
# skeletal density of the fresh OC particle (calculated from the known
# composition of the fresh particle, and the skeletal density of its
# components [see the solids property package])
m.fs.MB.solid_inlet.particle_porosity[0].fix(0.27)
m.fs.MB.solid_inlet.temperature[0].fix(1183.15) # K
m.fs.MB.solid_inlet.mass_frac_comp[0, "Fe2O3"].fix(0.45)
m.fs.MB.solid_inlet.mass_frac_comp[0, "Fe3O4"].fix(1e-9)
m.fs.MB.solid_inlet.mass_frac_comp[0, "Al2O3"].fix(0.55)
# Initialize fuel reactor
t_start = time.time() # Run start time
# State arguments for initializing property state blocks
# Gas phase temperature is initialized at solid
# temperature because thermal mass of solid >> thermal mass of gas
# Particularly useful for initialization if reaction takes place
blk = m.fs.MB
gas_phase_state_args = {
'flow_mol': blk.gas_inlet.flow_mol[0].value,
'temperature': blk.solid_inlet.temperature[0].value,
'pressure': blk.gas_inlet.pressure[0].value,
'mole_frac': {
'CH4': blk.gas_inlet.mole_frac_comp[0, 'CH4'].value,
'CO2': blk.gas_inlet.mole_frac_comp[0, 'CO2'].value,
'H2O': blk.gas_inlet.mole_frac_comp[0, 'H2O'].value
}
}
solid_phase_state_args = {
'flow_mass': blk.solid_inlet.flow_mass[0].value,
'particle_porosity': blk.solid_inlet.particle_porosity[0].value,
'temperature': blk.solid_inlet.temperature[0].value,
'mass_frac': {
'Fe2O3': blk.solid_inlet.mass_frac_comp[0, 'Fe2O3'].value,
'Fe3O4': blk.solid_inlet.mass_frac_comp[0, 'Fe3O4'].value,
'Al2O3': blk.solid_inlet.mass_frac_comp[0, 'Al2O3'].value
}
}
m.fs.MB.initialize(outlvl=idaeslog.INFO,
gas_phase_state_args=gas_phase_state_args,
solid_phase_state_args=solid_phase_state_args)
t_initialize = time.time() # Initialization time
# Create a solver
solver = get_solver()
solver.solve(m.fs.MB, tee=True)
t_simulation = time.time() # Simulation time
print("\n")
print("----------------------------------------------------------")
print('Total initialization time: ', value(t_initialize - t_start), " s")
print("----------------------------------------------------------")
print("\n")
print("----------------------------------------------------------")
print('Total simulation time: ', value(t_simulation - t_start), " s")
print("----------------------------------------------------------")
return m