patch: Variable dt

CHANGELOG.md

@@ -51,7 +51,7 @@
   - The `FlexibleDemandOpenLoopConverterController` has been renamed to `FlexibleDemandComponent`
   - The `DemandOpenLoopConverterController` has been renamed to `GenericDemandComponent`
 - Modified CI setup so Windows is temporarily disabled and also so unit, regression, and integration tests are run in separate jobs to speed up testing and provide more information on test failures. [PR 668](https://github.com/NatLabRockies/H2Integrate/pull/668)
-- Added infrastructure for running models with non-hourly time steps via a class attribute `_time_step_bounds` and sets new time step bounds of 5-minutes to 1-hour for the grid components. [PR 653](https://github.com/NatLabRockies/H2Integrate/pull/653)
+- Added infrastructure for running models with non-hourly time steps via a class attribute `_time_step_bounds` and sets new time step bounds of 5-minutes to 1-hour for the grid components. [PR 653](https://github.com/NatLabRockies/H2Integrate/pull/653) and [PR 671](https://github.com/NatLabRockies/H2Integrate/pull/671)
 
 ## 0.7.2 [April 9, 2026]
 

examples/06_custom_tech/user_defined_model/paper_mill.py

@@ -16,7 +16,10 @@ class PaperMillConfig(BaseConfig):
 
 
 class PaperMillPerformance(om.ExplicitComponent):
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         self.options.declare("driver_config", types=dict)
@@ -55,7 +58,10 @@ class PaperMillCostConfig(CostModelBaseConfig):
 
 
 class PaperMillCost(CostModelBaseClass):
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = PaperMillCostConfig.from_dict(

h2integrate/control/control_rules/converters/generic_converter.py

@@ -9,7 +9,10 @@
 
 
 class PyomoDispatchGenericConverter(PyomoRuleBaseClass):
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = PyomoRuleBaseConfig.from_dict(

h2integrate/control/control_rules/pyomo_rule_baseclass.py

@@ -22,7 +22,10 @@ class PyomoRuleBaseConfig(BaseConfig):
 
 
 class PyomoRuleBaseClass(om.ExplicitComponent):
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         self.options.declare("driver_config", types=dict)

h2integrate/control/control_rules/storage/pyomo_storage_rule_baseclass.py

@@ -24,7 +24,10 @@ class PyomoStorageRuleBaseConfig(PyomoRuleBaseConfig):
 class PyomoRuleStorageBaseclass(PyomoRuleBaseClass):
     """Base class defining Pyomo rules for generic commodity storage components."""
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = PyomoStorageRuleBaseConfig.from_dict(

h2integrate/control/control_strategies/heuristic_pyomo_controller.py

@@ -70,7 +70,10 @@ class HeuristicLoadFollowingController(PyomoControllerBaseClass):
 
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         """Initialize the heuristic load-following controller."""

h2integrate/control/control_strategies/optimized_pyomo_controller.py

@@ -100,7 +100,10 @@ class OptimizedDispatchController(PyomoControllerBaseClass):
 
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         """Initialize the optimized dispatch controller."""

h2integrate/control/control_strategies/pyomo_controller_baseclass.py

@@ -75,7 +75,10 @@ def __attrs_post_init__(self):
 
 
 class PyomoControllerBaseClass(om.ExplicitComponent):
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         """

h2integrate/control/control_strategies/storage/demand_openloop_storage_controller.py

@@ -115,7 +115,10 @@ class DemandOpenLoopStorageController(StorageOpenLoopControlBase):
     commodity to charge, discharge, or curtail at each time step.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = DemandOpenLoopStorageControllerConfig.from_dict(

h2integrate/control/control_strategies/storage/openloop_storage_control_base.py

@@ -38,7 +38,10 @@ class StorageOpenLoopControlBase(om.ExplicitComponent):
     dispatch command profile.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         self.options.declare("driver_config", types=dict)

h2integrate/control/control_strategies/storage/simple_openloop_controller.py

@@ -56,7 +56,10 @@ class SimpleStorageOpenLoopController(StorageOpenLoopControlBase):
     uncontrolled frameworks.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = SimpleStorageOpenLoopControllerConfig.from_dict(

h2integrate/converters/ammonia/ammonia_synloop.py

@@ -139,7 +139,10 @@ class AmmoniaSynLoopPerformanceModel(ResizeablePerformanceModelBaseClass):
     conversion efficiency up to the limiting reagent or energy input.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()
@@ -425,7 +428,10 @@ class AmmoniaSynLoopCostModel(CostModelBaseClass):
         Annual maintenance cost
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         target_cost_year = self.options["plant_config"]["finance_parameters"][

h2integrate/converters/ammonia/simple_ammonia_model.py

@@ -30,7 +30,10 @@ class SimpleAmmoniaPerformanceModel(PerformanceModelBaseClass):
     Computes annual ammonia production based on plant capacity and capacity factor.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()
@@ -110,7 +113,10 @@ class SimpleAmmoniaCostModel(CostModelBaseClass):
     Includes CapEx, OpEx, and byproduct credits, and exposes all detailed cost outputs.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = AmmoniaCostModelConfig.from_dict(

h2integrate/converters/co2/marine/direct_ocean_capture.py

@@ -76,7 +76,10 @@ class DOCPerformanceModel(PerformanceModelBaseClass):
     An OpenMDAO component for modeling the performance of a Direct Ocean Capture (DOC) plant.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()
@@ -155,7 +158,10 @@ class DOCCostModel(CostModelBaseClass):
     direct ocean capture (DOC) system.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()

h2integrate/converters/co2/marine/ocean_alkalinity_enhancement.py

@@ -69,7 +69,10 @@ class OAEPerformanceConfig(BaseConfig):
 class OAEPerformanceModel(PerformanceModelBaseClass):
     """OpenMDAO component for modeling Ocean Alkalinity Enhancement (OAE) performance."""
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()
@@ -257,7 +260,10 @@ class OAECostModel(CostModelBaseClass):
     ocean alkalinity enhancement (OAE) system.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()
@@ -351,7 +357,10 @@ class OAECostAndFinancialModel(CostModelBaseClass):
         - Carbon Credit Value
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()

h2integrate/converters/generic_converter_cost.py

@@ -50,7 +50,10 @@ def __attrs_post_init__(self):
 
 
 class GenericConverterCostModel(CostModelBaseClass):
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = GenericConverterCostConfig.from_dict(

h2integrate/converters/grid/grid.py

@@ -47,7 +47,10 @@ class GridPerformanceModel(PerformanceModelBaseClass):
         electricity_out (array): Power flowing out of the grid (buying) (kW).
     """
 
-    _time_step_bounds = (300, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        300,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()
@@ -182,7 +185,10 @@ class GridCostModel(CostModelBaseClass):
 
     """
 
-    _time_step_bounds = (300, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        300,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = GridCostModelConfig.from_dict(

h2integrate/converters/hopp/hopp_wrapper.py

@@ -28,7 +28,10 @@ class HOPPComponent(PerformanceModelBaseClass, CacheBaseClass):
     computed results when the same configuration is encountered.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()

h2integrate/converters/hydrogen/basic_cost_model.py

@@ -35,7 +35,10 @@ class BasicElectrolyzerCostModel(ElectrolyzerCostBaseClass):
     An OpenMDAO component that computes the cost of a PEM electrolyzer.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = BasicElectrolyzerCostModelConfig.from_dict(

h2integrate/converters/hydrogen/custom_electrolyzer_cost_model.py

@@ -27,7 +27,10 @@ class CustomElectrolyzerCostModel(ElectrolyzerCostBaseClass):
     An OpenMDAO component that computes the cost of a PEM electrolyzer.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = CustomElectrolyzerCostModelConfig.from_dict(

h2integrate/converters/hydrogen/electrolyzer_baseclass.py

@@ -5,7 +5,10 @@
 
 
 class ElectrolyzerPerformanceBaseClass(ResizeablePerformanceModelBaseClass):
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()
@@ -30,7 +33,10 @@ def compute(self, inputs, outputs):
 
 
 class ElectrolyzerCostBaseClass(CostModelBaseClass):
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         n_timesteps = self.options["plant_config"]["plant"]["simulation"]["n_timesteps"]

h2integrate/converters/hydrogen/geologic/aspen_surface_processing.py

@@ -76,7 +76,10 @@ class AspenGeoH2SurfacePerformanceModel(GeoH2SurfacePerformanceBaseClass):
             Hourly steam production profile (8760 hours), in kW thermal.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = AspenGeoH2SurfacePerformanceConfig.from_dict(
@@ -246,7 +249,10 @@ class AspenGeoH2SurfaceCostModel(GeoH2SurfaceCostBaseClass):
         All inherited from GeoH2SurfaceCostBaseClass
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         self.config = AspenGeoH2SurfaceCostConfig.from_dict(

h2integrate/converters/hydrogen/geologic/h2_well_subsurface_baseclass.py

@@ -86,7 +86,10 @@ class GeoH2SubsurfacePerformanceBaseClass(PerformanceModelBaseClass):
             The total hydrogen produced over the plant lifetime, in kilograms per year.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def initialize(self):
         super().initialize()
@@ -171,7 +174,10 @@ class GeoH2SubsurfaceCostBaseClass(CostModelBaseClass):
             Variable OPEX per kilogram of wellhead gas produced, in USD/kg.
     """
 
-    _time_step_bounds = (3600, 3600)  # (min, max) time step lengths compatible with this model
+    _time_step_bounds = (
+        3600,
+        3600,
+    )  # (min, max) time step lengths (in seconds) compatible with this model
 
     def setup(self):
         super().setup()