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# The Institute for the Design of Advanced Energy Systems Integrated Platform
# Framework (IDAES IP) was produced under the DOE Institute for the
# Design of Advanced Energy Systems (IDAES).
#
# Copyright (c) 2018-2023 by the software owners: The Regents of the
# University of California, through Lawrence Berkeley National Laboratory,
# National Technology & Engineering Solutions of Sandia, LLC, Carnegie Mellon
# University, West Virginia University Research Corporation, et al.
# All rights reserved.  Please see the files COPYRIGHT.md and LICENSE.md
# for full copyright and license information.
###############################################################################

Custom Heater Unit Model#

Author: Andrew Lee
Maintainer: Andrew Lee
Updated: 2023-06-01

import pyomo.environ as pe
from pyomo.common.config import ConfigBlock, ConfigValue, In
from idaes.core import (
    ControlVolume0DBlock,
    declare_process_block_class,
    EnergyBalanceType,
    MomentumBalanceType,
    MaterialBalanceType,
    UnitModelBlockData,
    useDefault,
    FlowsheetBlock,
)
from idaes.core.util.config import is_physical_parameter_block
from idaes.core.util.misc import add_object_reference
from idaes_examples.mod.methanol.methanol_param_VLE import PhysicalParameterBlock
def make_control_volume(unit, name, config):
    if config.dynamic is not False:
        raise ValueError("IdealGasIsentropcCompressor does not support dynamics")
    if config.has_holdup is not False:
        raise ValueError("IdealGasIsentropcCompressor does not support holdup")

    control_volume = ControlVolume0DBlock(
        property_package=config.property_package,
        property_package_args=config.property_package_args,
    )

    setattr(unit, name, control_volume)

    control_volume.add_state_blocks(has_phase_equilibrium=config.has_phase_equilibrium)
    control_volume.add_material_balances(
        balance_type=config.material_balance_type,
        has_phase_equilibrium=config.has_phase_equilibrium,
    )
    control_volume.add_total_enthalpy_balances(
        has_heat_of_reaction=False, has_heat_transfer=True, has_work_transfer=False
    )
    control_volume.add_total_pressure_balances(has_pressure_change=False)
def make_config_block(config):
    config.declare(
        "material_balance_type",
        ConfigValue(
            default=MaterialBalanceType.componentPhase, domain=In(MaterialBalanceType)
        ),
    )
    config.declare(
        "energy_balance_type",
        ConfigValue(
            default=EnergyBalanceType.enthalpyTotal,
            domain=In([EnergyBalanceType.enthalpyTotal]),
        ),
    )
    config.declare(
        "momentum_balance_type",
        ConfigValue(
            default=MomentumBalanceType.pressureTotal,
            domain=In([MomentumBalanceType.pressureTotal]),
        ),
    )
    config.declare(
        "has_phase_equilibrium", ConfigValue(default=False, domain=In([False]))
    )
    config.declare(
        "has_pressure_change", ConfigValue(default=False, domain=In([False]))
    )
    config.declare(
        "property_package",
        ConfigValue(default=useDefault, domain=is_physical_parameter_block),
    )
    config.declare("property_package_args", ConfigBlock(implicit=True))
@declare_process_block_class("Heater")
class HeaterData(UnitModelBlockData):
    CONFIG = UnitModelBlockData.CONFIG()
    make_config_block(CONFIG)

    def build(self):
        super(HeaterData, self).build()

        make_control_volume(self, "control_volume", self.config)

        self.add_inlet_port()
        self.add_outlet_port()

        add_object_reference(self, "heat", self.control_volume.heat[0.0])
m = pe.ConcreteModel()
m.fs = fs = FlowsheetBlock(dynamic=False)
fs.properties = props = PhysicalParameterBlock(
    Cp=0.038056, valid_phase="Vap"
)  # MJ/kmol-K

fs.heater = Heater(property_package=props, has_phase_equilibrium=False)
fs.heater.inlet.flow_mol.fix(1)  # kmol
fs.heater.inlet.mole_frac_comp[0, "CH3OH"].fix(0.25)
fs.heater.inlet.mole_frac_comp[0, "CH4"].fix(0.25)
fs.heater.inlet.mole_frac_comp[0, "H2"].fix(0.25)
fs.heater.inlet.mole_frac_comp[0, "CO"].fix(0.25)
fs.heater.inlet.pressure.fix(0.1)  # MPa
fs.heater.inlet.temperature.fix(3)  # hK [100K]
fs.heater.heat.fix(5)  # MJ

opt = pe.SolverFactory("ipopt")
res = opt.solve(m, tee=False)
print(res.solver.termination_condition)
fs.heater.outlet.display()
WARNING: Could not locate the 'ipopt' executable, which is required for solver
ipopt
---------------------------------------------------------------------------
ApplicationError                          Traceback (most recent call last)
Cell In[6], line 18
     15 fs.heater.heat.fix(5)  # MJ
     17 opt = pe.SolverFactory("ipopt")
---> 18 res = opt.solve(m, tee=False)
     19 print(res.solver.termination_condition)
     20 fs.heater.outlet.display()

File ~/checkouts/readthedocs.org/user_builds/idaes-examples/envs/latest/lib/python3.8/site-packages/pyomo/opt/base/solvers.py:534, in OptSolver.solve(self, *args, **kwds)
    531 def solve(self, *args, **kwds):
    532     """Solve the problem"""
--> 534     self.available(exception_flag=True)
    535     #
    536     # If the inputs are models, then validate that they have been
    537     # constructed! Collect suffix names to try and import from solution.
    538     #
    539     from pyomo.core.base.block import _BlockData

File ~/checkouts/readthedocs.org/user_builds/idaes-examples/envs/latest/lib/python3.8/site-packages/pyomo/opt/solver/shellcmd.py:139, in SystemCallSolver.available(self, exception_flag)
    137     if exception_flag:
    138         msg = "No executable found for solver '%s'"
--> 139         raise ApplicationError(msg % self.name)
    140     return False
    141 return True

ApplicationError: No executable found for solver 'ipopt'