#################################################################################
# WaterTAP Copyright (c) 2020-2024, 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/"
#################################################################################
import pyomo.environ as pyo
from ..util import (
register_costing_parameter_block,
make_capital_cost_var,
make_fixed_operating_cost_var,
)
def build_electrolyzer_cost_param_block(blk):
blk.factor_membrane_replacement = pyo.Var(
initialize=0.33,
doc="membrane replacement factor (fraction of membrane replaced/year)",
units=pyo.units.year**-1,
)
blk.membrane_unit_cost = pyo.Var(
initialize=25, # (Yee, 2012)
doc="membrane unit cost",
units=pyo.units.USD_2012 / (pyo.units.meter**2),
)
blk.anode_unit_cost = pyo.Var(
initialize=300, # assumed
doc="anode unit cost",
units=pyo.units.USD_2005 / (pyo.units.meter**2),
)
blk.cathode_unit_cost = pyo.Var(
initialize=600, # (O'Brien, 2005)
doc="cathode unit cost",
units=pyo.units.USD_2005 / (pyo.units.meter**2),
)
blk.fraction_material_cost = pyo.Var(
initialize=0.65,
doc="membrane, anode, and cathode fraction of total capital",
units=pyo.units.dimensionless,
)
[docs]@register_costing_parameter_block(
build_rule=build_electrolyzer_cost_param_block,
parameter_block_name="electrolyzer",
)
def cost_electrolyzer(blk):
"""
electrolyzer costing method
"""
# ---------------------------------------------------------------------
make_capital_cost_var(blk)
blk.membrane_cost = pyo.Var(
initialize=1e5,
domain=pyo.NonNegativeReals,
units=blk.costing_package.base_currency,
doc="membrane capital cost",
)
blk.anode_cost = pyo.Var(
initialize=1e5,
domain=pyo.NonNegativeReals,
units=blk.costing_package.base_currency,
doc="anode capital cost",
)
blk.cathode_cost = pyo.Var(
initialize=1e5,
domain=pyo.NonNegativeReals,
units=blk.costing_package.base_currency,
doc="cathode capital cost",
)
blk.membrane_replacement_cost = pyo.Var(
initialize=1e5,
domain=pyo.NonNegativeReals,
units=blk.costing_package.base_currency / blk.costing_package.base_period,
doc="membrane replacement cost",
)
# ---------------------------------------------------------------------
make_fixed_operating_cost_var(blk)
# not using cost_membrane() utility to bypass required naming conventions
blk.membrane_cost_constraint = pyo.Constraint(
expr=blk.membrane_cost
== pyo.units.convert(
blk.costing_package.electrolyzer.membrane_unit_cost
* blk.unit_model.membrane_area,
to_units=blk.costing_package.base_currency,
)
)
blk.anode_cost_constraint = pyo.Constraint(
expr=blk.anode_cost
== pyo.units.convert(
blk.costing_package.electrolyzer.anode_unit_cost
* blk.unit_model.anode_area,
to_units=blk.costing_package.base_currency,
)
)
blk.cathode_cost_constraint = pyo.Constraint(
expr=blk.cathode_cost
== pyo.units.convert(
blk.costing_package.electrolyzer.cathode_unit_cost
* blk.unit_model.cathode_area,
to_units=blk.costing_package.base_currency,
)
)
blk.costing_package.add_cost_factor(blk, "TIC")
blk.capital_cost_constraint = pyo.Constraint(
expr=blk.capital_cost
== blk.cost_factor
* (blk.membrane_cost + blk.anode_cost + blk.cathode_cost)
/ blk.costing_package.electrolyzer.fraction_material_cost
)
# ---------------------------------------------------------------------
blk.membrane_replacement_cost_constraint = pyo.Constraint(
expr=blk.membrane_replacement_cost
== pyo.units.convert(
blk.costing_package.electrolyzer.factor_membrane_replacement
* blk.costing_package.electrolyzer.membrane_unit_cost
* blk.unit_model.membrane_area,
to_units=blk.costing_package.base_currency
/ blk.costing_package.base_period,
)
)
blk.costing_package.cost_flow(
pyo.units.convert(blk.unit_model.power, to_units=pyo.units.kW),
"electricity",
)
blk.fixed_operating_cost_constraint = pyo.Constraint(
expr=blk.fixed_operating_cost == blk.membrane_replacement_cost
)