ElectroNP ZO model with UnitModelBlockData base

watertap/costing/units/electroNP.py

@@ -0,0 +1,89 @@
+#################################################################################
+# WaterTAP Copyright (c) 2020-2023, 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,
+)
+
+
+def build_electroNP_cost_param_block(blk):
+
+    blk.HRT = pyo.Var(
+        initialize=1.3333,
+        doc="Hydraulic retention time",
+        units=pyo.units.hr,
+    )
+    blk.sizing_cost = pyo.Var(
+        initialize=1.25,
+        doc="Reactor sizing cost",
+        units=pyo.units.USD_2020 / pyo.units.m**3,
+    )
+
+
+@register_costing_parameter_block(
+    build_rule=build_electroNP_cost_param_block,
+    parameter_block_name="electroNP",
+)
+def cost_electroNP(blk, cost_electricity_flow=True, cost_MgCl2_flow=True):
+    """
+    ElectroNP costing method
+    """
+    cost_electroNP_capital(
+        blk,
+        blk.costing_package.electroNP.HRT,
+        blk.costing_package.electroNP.sizing_cost,
+    )
+
+    t0 = blk.flowsheet().time.first()
+    if cost_electricity_flow:
+        blk.costing_package.cost_flow(
+            pyo.units.convert(
+                blk.unit_model.electricity[t0],
+                to_units=pyo.units.kW,
+            ),
+            "electricity",
+        )
+
+    if cost_MgCl2_flow:
+        blk.costing_package.cost_flow(
+            pyo.units.convert(
+                blk.unit_model.MgCl2_flowrate[t0],
+                to_units=pyo.units.kg / pyo.units.hr,
+            ),
+            "magnesium chloride",
+        )
+
+
+def cost_electroNP_capital(blk, HRT, sizing_cost):
+    """
+    Generic function for costing an ElectroNP system.
+    """
+    make_capital_cost_var(blk)
+
+    blk.HRT = pyo.Expression(expr=HRT)
+    blk.sizing_cost = pyo.Expression(expr=sizing_cost)
+
+    flow_in = pyo.units.convert(
+        blk.unit_model.properties_in[0].flow_vol,
+        to_units=pyo.units.m**3 / pyo.units.hr,
+    )
+
+    print(f"base_currency: {blk.costing_package.base_currency}")
+    blk.capital_cost_constraint = pyo.Constraint(
+        expr=blk.capital_cost
+        == pyo.units.convert(
+            blk.HRT * flow_in * blk.sizing_cost,
+            to_units=blk.costing_package.base_currency,
+        )
+    )

watertap/costing/watertap_costing_package.py

@@ -37,6 +37,7 @@
     EnergyRecoveryDevice,
     Electrodialysis0D,
     Electrodialysis1D,
+    ElectroNPZO,
     IonExchange0D,
     GAC,
 )
@@ -55,6 +56,7 @@
 from .units.pump import cost_pump
 from .units.reverse_osmosis import cost_reverse_osmosis
 from .units.uv_aop import cost_uv_aop
+from .units.electroNP import cost_electroNP
 
 
 class _DefinedFlowsDict(MutableMapping, dict):
@@ -95,6 +97,7 @@ class WaterTAPCostingData(FlowsheetCostingBlockData):
         Ultraviolet0D: cost_uv_aop,
         Electrodialysis0D: cost_electrodialysis,
         Electrodialysis1D: cost_electrodialysis,
+        ElectroNPZO: cost_electroNP,
         IonExchange0D: cost_ion_exchange,
         GAC: cost_gac,
     }
@@ -159,6 +162,14 @@ def build_global_params(self):
             units=pyo.units.kg / pyo.units.kWh,
         )
 
+        self.magnesium_chloride_cost = pyo.Param(
+            mutable=True,
+            initialize=0.0786,
+            doc="Magnesium chloride cost",
+            units=pyo.units.USD_2020 / pyo.units.kg,
+        )
+        self.add_defined_flow("magnesium chloride", self.magnesium_chloride_cost)
+
         # fix the parameters
         self.fix_all_vars()
 

watertap/unit_models/__init__.py

@@ -26,3 +26,4 @@
 from .ion_exchange_0D import IonExchange0D
 from .thickener import Thickener
 from .dewatering import DewateringUnit
+from .electroNP_ZO import ElectroNPZO