softwareengineerprogrammer · softwareengineerprogrammer · Jun 22, 2026 · May 19, 2026 · May 19, 2026 · May 19, 2026
diff --git a/.bumpversion.cfg b/.bumpversion.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 3.14.1
+current_version = 3.15.0
 commit = True
 tag = True
 

diff --git a/.cookiecutterrc b/.cookiecutterrc
@@ -54,7 +54,7 @@ default_context:
     sphinx_doctest: "no"
     sphinx_theme: "sphinx-py3doc-enhanced-theme"
     test_matrix_separate_coverage: "no"
-    version: 3.14.1
+    version: 3.15.0
     version_manager: "bump2version"
     website: "https://github.com/NREL"
     year_from: "2023"

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
@@ -5,6 +5,11 @@ Changelog
 GEOPHIRES v3 (2023-2026)
 ------------------------
 
+3.15
+^^^^
+
+3.15: `Calculate S-DAC carbon revenue (BICYCLE) <https://github.com/NREL/GEOPHIRES-X/pull/510>`__ | `release <https://github.com/NREL/GEOPHIRES-X/releases/tag/v3.15.0>`__ | **Changed:** S-DAC carbon revenue is now calculated. See `the tracking issue <https://github.com/NatLabRockies/GEOPHIRES-X/issues/341`__ for details.
+
 3.14
 ^^^^
 

diff --git a/README.rst b/README.rst
@@ -58,9 +58,9 @@ Free software: `MIT license <LICENSE>`__
     :alt: Supported implementations
     :target: https://pypi.org/project/geophires-x
 
-.. |commits-since| image:: https://img.shields.io/github/commits-since/softwareengineerprogrammer/GEOPHIRES-X/v3.14.1.svg
+.. |commits-since| image:: https://img.shields.io/github/commits-since/softwareengineerprogrammer/GEOPHIRES-X/v3.15.0.svg
     :alt: Commits since latest release
-    :target: https://github.com/softwareengineerprogrammer/GEOPHIRES-X/compare/v3.14.1...main
+    :target: https://github.com/softwareengineerprogrammer/GEOPHIRES-X/compare/v3.15.0...main
 
 .. |docs| image:: https://readthedocs.org/projects/GEOPHIRES-X/badge/?style=flat
     :target: https://softwareengineerprogrammer.github.io/GEOPHIRES
@@ -176,22 +176,70 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `Fervo_Project_Cape-6.txt <tests/examples/Fervo_Project_Cape-6.txt>`__
      - `.out <tests/examples/Fervo_Project_Cape-6.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=Fervo_Project_Cape-6>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 1: EGS Electricity
      - `example1.txt <tests/examples/example1.txt>`__
      - `.out <tests/examples/example1.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example1>`__
+   * - SAM Single Owner PPA: 50 MWe (`documentation <https://softwareengineerprogrammer.github.io/GEOPHIRES/SAM-Economic-Models.html>`__)
+     - `example_SAM-single-owner-PPA.txt <tests/examples/example_SAM-single-owner-PPA.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA>`__
    * - Example 1 with Add-Ons
      - `example1_addons.txt <tests/examples/example1_addons.txt>`__
      - `.out <tests/examples/example1_addons.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example1_addons>`__
+   * - SAM Single Owner PPA: 50 MWe with Add-ons
+     - `example_SAM-single-owner-PPA-3.txt <tests/examples/example_SAM-single-owner-PPA-3.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA-3.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-3>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 2: EGS Direct-Use Heat
      - `example2.txt <tests/examples/example2.txt>`__
      - `.out <tests/examples/example2.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example2>`__
+   * - SAM Single Owner PPA: Direct-Use Heat
+     - `example_SAM-single-owner-PPA-8_heat.txt <tests/examples/example_SAM-single-owner-PPA-8_heat.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA-8_heat.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-8_heat>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 3: EGS Co-generation
      - `example3.txt <tests/examples/example3.txt>`__
      - `.out <tests/examples/example3.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example3>`__
+   * - SAM Single Owner PPA: CHP
+     - `example_SAM-single-owner-PPA-7_chp.txt <tests/examples/example_SAM-single-owner-PPA-7_chp.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA-7_chp.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7_chp>`__
+   * - SAM Single Owner PPA: CHP with Carbon Credits
+     - `example_SAM-single-owner-PPA-7b_chp-cc.txt <tests/examples/example_SAM-single-owner-PPA-7b_chp-cc.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA-7b_chp-cc.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7b_chp-cc>`__
+   * - SAM Single Owner PPA: CHP with Surface Plant Capital Cost
+     - `example_SAM-single-owner-PPA-7c.txt <tests/examples/example_SAM-single-owner-PPA-7c.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA-7c.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7c>`__
+   * - SAM Single Owner PPA: CHP: Bottoming Cycle
+     - `example_SAM-single-owner-PPA-7d_chp-bottoming.txt <tests/examples/example_SAM-single-owner-PPA-7d_chp-bottoming.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA-7d_chp-bottoming.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7d_chp-bottoming>`__
+   * - SAM Single Owner PPA: CHP: Parallel Cycle
+     - `example_SAM-single-owner-PPA-7e_chp-parallel.txt <tests/examples/example_SAM-single-owner-PPA-7e_chp-parallel.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA-7e_chp-parallel.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7e_chp-parallel>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 4: Hydrothermal Electricity
      - `example4.txt <tests/examples/example4.txt>`__
      - `.out <tests/examples/example4.out>`__
@@ -200,6 +248,10 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example4.txt <tests/examples/example4b_drawdown-schedule.txt>`__
      - `.out <tests/examples/example4b_drawdown-schedule.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example4b_drawdown-schedule>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 5: User-Provided Reservoir Data (File Parameter)
      - `example5.txt <tests/examples/example5.txt>`__
      - `.out <tests/examples/example5.out>`__
@@ -208,6 +260,10 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example5b.txt <tests/examples/example5b.txt>`__
      - `.out <tests/examples/example5b.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example5b>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 6: TOUGH2 (Multiple Gradients)
      - `example6.txt <tests/examples/example6.txt>`__
      - `.out <tests/examples/example6.out>`__
@@ -216,6 +272,10 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example7.txt <tests/examples/example7.txt>`__
      - `.out <tests/examples/example7.out>`__
      - \*
+   * -  
+     -  
+     -  
+     -  
    * - Example 8: Cornell Direct-Use Heat
      - `example8.txt <tests/examples/example8.txt>`__
      - `.out <tests/examples/example8.out>`__
@@ -224,18 +284,38 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example9.txt <tests/examples/example9.txt>`__
      - `.out <tests/examples/example9.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example9>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 10: Heat Pump
      - `example10_HP.txt <tests/examples/example10_HP.txt>`__
      - `.out <tests/examples/example10_HP.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example10_HP>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 11: Absorption Chiller
      - `example11_AC.txt <tests/examples/example11_AC.txt>`__
      - `.out <tests/examples/example11_AC.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example11_AC>`__
+   * - SAM Single Owner PPA: Cooling
+     - `example_SAM-single-owner-PPA-9_cooling.txt <tests/examples/example_SAM-single-owner-PPA-9_cooling.txt>`__
+     - `.out <tests/examples/example_SAM-single-owner-PPA-9_cooling.out>`__
+     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-9_cooling>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 12: District Heating
      - `example12_DH.txt <tests/examples/example12_DH.txt>`__
      - `.out <tests/examples/example12_DH.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example12_DH>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 13: Redrilling due to Drawdown
      - `example13.txt <tests/examples/example13.txt>`__
      - `.out <tests/examples/example13.out>`__
@@ -244,10 +324,18 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example13.txt <tests/examples/example13b_well-integrity.txt>`__
      - `.out <tests/examples/example13b_well-integrity.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example13b_well-integrity>`__
+   * -  
+     -  
+     -  
+     -  
    * - Example 14: Data Center
      - `example14_data-center.txt <tests/examples/example14_data-center.txt>`__
      - `.out <tests/examples/example14_data-center.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example14_data-center>`__
+   * -  
+     -  
+     -  
+     -  
    * - CLGS: Coaxial sCO2: Heat
      - `[...]Coaxial_sCO2_heat.txt <tests/examples/Beckers_et_al_2023_Tabulated_Database_Coaxial_sCO2_heat.txt>`__
      - `.out <tests/examples/Beckers_et_al_2023_Tabulated_Database_Coaxial_sCO2_heat.out>`__
@@ -284,6 +372,10 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example_SBT_ULoop.txt <tests/examples/example_SBT_ULoop.txt>`__
      - `.out <tests/examples/example_SBT_ULoop.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SBT_ULoop>`__
+   * -  
+     -  
+     -  
+     -  
    * - SUTRA Example 1
      - `SUTRAExample1.txt <tests/examples/SUTRAExample1.txt>`__
      - `.out <tests/examples/SUTRAExample1.out>`__
@@ -300,6 +392,10 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example_PTC.txt <tests/examples/example_PTC.txt>`__
      - `.out <tests/examples/example_PTC.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_PTC>`__
+   * -  
+     -  
+     -  
+     -  
    * - Fervo Project Red (2023)
      - `Fervo_Norbeck_Latimer_2023.txt <tests/examples/Fervo_Norbeck_Latimer_2023.txt>`__
      - `.out <tests/examples/Fervo_Norbeck_Latimer_2023.out>`__
@@ -324,6 +420,10 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `Fervo_Project_Cape-4.txt <tests/examples/Fervo_Project_Cape-4.txt>`__
      - `.out <tests/examples/Fervo_Project_Cape-4.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=Fervo_Project_Cape-4>`__
+   * -  
+     -  
+     -  
+     -  
    * - Superhot Rock (SHR) Example 1
      - `example_SHR-1.txt <tests/examples/example_SHR-1.txt>`__
      - `.out <tests/examples/example_SHR-1.out>`__
@@ -336,18 +436,14 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example_SHR-3.txt <tests/examples/example_SHR-3.txt>`__
      - `.out <tests/examples/example_SHR-3.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SHR-3>`__
-   * - SAM Single Owner PPA: 50 MWe (`documentation <https://softwareengineerprogrammer.github.io/GEOPHIRES/SAM-Economic-Models.html>`__)
-     - `example_SAM-single-owner-PPA.txt <tests/examples/example_SAM-single-owner-PPA.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA>`__
+   * -  
+     -  
+     -  
+     -  
    * - SAM Single Owner PPA: 400 MWe BICYCLE Comparison
      - `example_SAM-single-owner-PPA-2.txt <tests/examples/example_SAM-single-owner-PPA-2.txt>`__
      - `.out <tests/examples/example_SAM-single-owner-PPA-2.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-2>`__
-   * - SAM Single Owner PPA: 50 MWe with Add-ons
-     - `example_SAM-single-owner-PPA-3.txt <tests/examples/example_SAM-single-owner-PPA-3.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA-3.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-3>`__
    * - SAM Single Owner PPA: 50 MWe with Royalties
      - `example_SAM-single-owner-PPA-4.txt <tests/examples/example_SAM-single-owner-PPA-4.txt>`__
      - `.out <tests/examples/example_SAM-single-owner-PPA-4.out>`__
@@ -364,34 +460,6 @@ Example-specific web interface deeplinks are listed in the Link column.
      - `example_SAM-single-owner-PPA-6_carbon-revenue.txt <tests/examples/example_SAM-single-owner-PPA-6_carbon-revenue.txt>`__
      - `.out <tests/examples/example_SAM-single-owner-PPA-6_carbon-revenue.out>`__
      - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-6_carbon-revenue>`__
-   * - SAM Single Owner PPA: CHP
-     - `example_SAM-single-owner-PPA-7_chp.txt <tests/examples/example_SAM-single-owner-PPA-7_chp.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA-7_chp.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7_chp>`__
-   * - SAM Single Owner PPA: CHP with Carbon Credits
-     - `example_SAM-single-owner-PPA-7b_chp-cc.txt <tests/examples/example_SAM-single-owner-PPA-7b_chp-cc.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA-7b_chp-cc.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7b_chp-cc>`__
-   * - SAM Single Owner PPA: CHP with Surface Plant Capital Cost
-     - `example_SAM-single-owner-PPA-7c.txt <tests/examples/example_SAM-single-owner-PPA-7c.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA-7c.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7c>`__
-   * - SAM Single Owner PPA: CHP: Bottoming Cycle
-     - `example_SAM-single-owner-PPA-7d_chp-bottoming.txt <tests/examples/example_SAM-single-owner-PPA-7d_chp-bottoming.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA-7d_chp-bottoming.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7d_chp-bottoming>`__
-   * - SAM Single Owner PPA: CHP: Parallel Cycle
-     - `example_SAM-single-owner-PPA-7e_chp-parallel.txt <tests/examples/example_SAM-single-owner-PPA-7e_chp-parallel.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA-7e_chp-parallel.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-7e_chp-parallel>`__
-   * - SAM Single Owner PPA: Direct-Use Heat
-     - `example_SAM-single-owner-PPA-8_heat.txt <tests/examples/example_SAM-single-owner-PPA-8_heat.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA-8_heat.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-8_heat>`__
-   * - SAM Single Owner PPA: Cooling
-     - `example_SAM-single-owner-PPA-9_cooling.txt <tests/examples/example_SAM-single-owner-PPA-9_cooling.txt>`__
-     - `.out <tests/examples/example_SAM-single-owner-PPA-9_cooling.out>`__
-     - `link <https://gtp.scientificwebservices.com/geophires?geophires-example-id=example_SAM-single-owner-PPA-9_cooling>`__
 .. raw:: html
 
    <embed>

diff --git a/docs/conf.py b/docs/conf.py
@@ -18,7 +18,7 @@
 year = '2025'
 author = 'NREL'
 copyright = f'{year}, {author}'
-version = release = '3.14.1'
+version = release = '3.15.0'
 
 pygments_style = 'trac'
 templates_path = ['./templates']

diff --git a/setup.py b/setup.py
@@ -13,7 +13,7 @@ def read(*names, **kwargs):
 
 setup(
     name='geophires-x',
-    version='3.14.1',
+    version='3.15.0',
     license='MIT',
     description='GEOPHIRES is a free and open-source geothermal techno-economic simulator.',
     long_description='{}\n{}'.format(

diff --git a/src/geophires_x/Economics.py b/src/geophires_x/Economics.py
@@ -2942,6 +2942,27 @@ def Calculate(self, model: Model) -> None:
         if self.DoSDACGTCalculations.value:
             model.sdacgteconomics.Calculate(model)
 
+            # Consolidate S-DAC-GT CAPEX and OPEX into the main plant ledgers
+            max_carbon_capacity_tonnes = np.max(model.sdacgteconomics.CarbonExtractedAnnually.value)
+            sdac_overnight_capex_musd = (
+                                                    model.sdacgteconomics.CAPEX.value * model.sdacgteconomics.CAPEX_mult.value * max_carbon_capacity_tonnes) / 1_000_000.0
+            self.CCap.value += sdac_overnight_capex_musd
+
+            avg_carbon_extracted_tonnes = np.average(model.sdacgteconomics.CarbonExtractedAnnually.value)
+            sdac_annual_opex_usd = (
+                                               model.sdacgteconomics.OPEX.value + model.sdacgteconomics.storage.value + model.sdacgteconomics.transport.value) * avg_carbon_extracted_tonnes
+
+            if model.sdacgteconomics.sorbent_replacement_frequency.value > 0:
+                max_carbon_capacity_tonnes = np.max(model.sdacgteconomics.CarbonExtractedAnnually.value)
+                replacements_per_lifetime = int(
+                    model.surfaceplant.plant_lifetime.value / model.sdacgteconomics.sorbent_replacement_frequency.value)
+                annualized_replacement_usd = (
+                                                         max_carbon_capacity_tonnes * model.sdacgteconomics.sorbent_replacement_cost.value * replacements_per_lifetime) / model.surfaceplant.plant_lifetime.value
+                sdac_annual_opex_usd += annualized_replacement_usd
+
+            sdac_annual_opex_musd = sdac_annual_opex_usd / 1_000_000.0
+            self.Coam.value += sdac_annual_opex_musd
+
         self.calculate_cashflow(model)
 
         # Calculate more financial values using numpy financials
@@ -3822,6 +3843,13 @@ def calculate_cashflow(self, model: Model) -> None:
                     self.TotalRevenue.value[i] = self.TotalRevenue.value[i] + self.CarbonRevenue.value[i]
                     #self.TotalCummRevenue.value[i] = self.TotalCummRevenue.value[i] + self.CarbonCummCashFlow.value[i]
 
+            if self.DoSDACGTCalculations.value:
+                for i in range(model.surfaceplant.construction_years.value,
+                               model.surfaceplant.plant_lifetime.value + model.surfaceplant.construction_years.value,
+                               1):
+                    sdac_index = i - model.surfaceplant.construction_years.value
+                    self.TotalRevenue.value[i] += (model.sdacgteconomics.CarbonRevenue.value[sdac_index] / 1_000_000.0)
+
             # for the sake of display, insert zeros at the beginning of the pricing arrays
             for i in range(0, model.surfaceplant.construction_years.value, 1):
                 self.ElecPrice.value.insert(0, 0.0)
-Original file line number
+Diff line change
@@ Expand Up / @@ -5,6 +5,11 @@ Changelog @@
     GEOPHIRES v3 (2023-2026)
     ------------------------
+.15
+    ^^^^
+.15: `Calculate S-DAC carbon revenue (BICYCLE) <https://github.com/NREL/GEOPHIRES-X/pull/510>`__ | `release <https://github.com/NREL/GEOPHIRES-X/releases/tag/v3.15.0>`__ | **Changed:** S-DAC carbon revenue is now calculated. See `the tracking issue <https://github.com/NatLabRockies/GEOPHIRES-X/issues/341`__ for details.
 .14
     ^^^^
@@ Expand Down @@