#################################################################################
# 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.
#################################################################################
"""
Standard IDAES Feed block with phase equilibrium.
"""
from enum import Enum
# Import Pyomo libraries
from pyomo.environ import Reference
from pyomo.common.config import ConfigBlock, ConfigValue, In
# Import IDAES cores
from idaes.core import (
ControlVolume0DBlock,
declare_process_block_class,
MaterialBalanceType,
MomentumBalanceType,
UnitModelBlockData,
useDefault,
)
from idaes.core.util.config import is_physical_parameter_block
from idaes.core.util.tables import create_stream_table_dataframe
from idaes.core.util.initialization import fix_state_vars
__author__ = "Andrew Lee"
# Enumerate options for material balances
class FlashType(Enum):
"""
Enum of supported flash types.
"""
isothermal = 1
isenthalpic = 2
[docs]@declare_process_block_class("FeedFlash")
class FeedFlashData(UnitModelBlockData):
"""
Standard Feed block with phase equilibrium
"""
CONFIG = ConfigBlock()
CONFIG.declare(
"dynamic",
ConfigValue(
domain=In([False]),
default=False,
description="Dynamic model flag - must be False",
doc="""Feed units do not support dynamic behavior.""",
),
)
CONFIG.declare(
"has_holdup",
ConfigValue(
default=False,
domain=In([False]),
description="Holdup construction flag - must be False",
doc="""Feed units do not have defined volume, thus this must be
False.""",
),
)
CONFIG.declare(
"material_balance_type",
ConfigValue(
default=MaterialBalanceType.useDefault,
domain=In(MaterialBalanceType),
description="Material balance construction flag",
doc="""Indicates what type of mass balance should be constructed,
**default** - MaterialBalanceType.useDefault.
**Valid values:** {
**MaterialBalanceType.useDefault - refer to property package for default
balance type
**MaterialBalanceType.none** - exclude material balances,
**MaterialBalanceType.componentPhase** - use phase component balances,
**MaterialBalanceType.componentTotal** - use total component balances,
**MaterialBalanceType.elementTotal** - use total element balances,
**MaterialBalanceType.total** - use total material balance.}""",
),
)
CONFIG.declare(
"flash_type",
ConfigValue(
default=FlashType.isothermal,
domain=In(FlashType),
description="Type of flash to perform",
doc="""Indicates what type of flash operation should be used.
**default** - FlashType.isothermal.
**Valid values:** {
**FlashType.isothermal** - specify temperature,
**FlashType.isenthalpic** - specify enthalpy.}""",
),
)
CONFIG.declare(
"property_package",
ConfigValue(
default=useDefault,
domain=is_physical_parameter_block,
description="Property package to use for control volume",
doc="""Property parameter object used to define property calculations,
**default** - useDefault.
**Valid values:** {
**useDefault** - use default package from parent model or flowsheet,
**PhysicalParameterObject** - a PhysicalParameterBlock object.}""",
),
)
CONFIG.declare(
"property_package_args",
ConfigBlock(
implicit=True,
description="Arguments to use for constructing property packages",
doc="""A ConfigBlock with arguments to be passed to a property block(s)
and used when constructing these,
**default** - None.
**Valid values:** {
see property package for documentation.}""",
),
)
[docs] def build(self):
"""
Begin building model.
Args:
None
Returns:
None
"""
# Call UnitModel.build to setup dynamics
super(FeedFlashData, self).build()
# Build Control Volume
self.control_volume = ControlVolume0DBlock(
dynamic=self.config.dynamic,
has_holdup=self.config.has_holdup,
property_package=self.config.property_package,
property_package_args=self.config.property_package_args,
)
# No need for control volume geometry
self.control_volume.add_state_blocks(has_phase_equilibrium=True)
self.control_volume.add_material_balances(
balance_type=self.config.material_balance_type, has_phase_equilibrium=True
)
# Add isothermal constraint
if self.config.flash_type == FlashType.isothermal:
@self.Constraint(self.flowsheet().time, doc="Isothermal constraint")
def isothermal(b, t):
return (
b.control_volume.properties_in[t].temperature
== b.control_volume.properties_out[t].temperature
)
elif self.config.flash_type == FlashType.isenthalpic:
@self.Constraint(self.flowsheet().time, doc="Isothermal constraint")
def isenthalpic(b, t):
cv = b.control_volume
return sum(
cv.properties_in[t].get_enthalpy_flow_terms(p)
for p in cv.properties_in[t].phase_list
) == sum(
cv.properties_out[t].get_enthalpy_flow_terms(p)
for p in cv.properties_in[t].phase_list
)
self.control_volume.add_momentum_balances(
balance_type=MomentumBalanceType.pressureTotal
)
# Add references to all feed state vars
s_vars = self.control_volume.properties_in[
self.flowsheet().time.first()
].define_state_vars()
for s in s_vars:
l_name = s_vars[s].local_name
if s_vars[s].is_indexed():
slicer = self.control_volume.properties_in[:].component(l_name)[...]
else:
slicer = self.control_volume.properties_in[:].component(l_name)
r = Reference(slicer)
setattr(self, s, r)
# Add Ports
self.add_outlet_port()
def _get_stream_table_contents(self, time_point=0):
return create_stream_table_dataframe(
{"Outlet": self.outlet}, time_point=time_point
)
[docs] def fix_initialization_states(self):
"""
Fix feed state variables
Returns:
None
"""
fix_state_vars(self.control_volume.properties_in)
