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…cost optimization
…and CO2 pricing considerations
…for background and intermediate costs
Create a dedicated methanol_and_iron_cost notebook to exercise the economic optimization workflow on the existing premise-based case study. The notebook adds illustrative market_price data to time-specific background nodes, builds OptimizationModelInputs from the LCA processor, creates a cost objective model, and includes result cells for total, cap-related, and operation-related costs. Extend node-based market price handling with optional product and unit disambiguation for ambiguous Brightway lookups. Add a cost-only metadata fallback when reading market_price attributes so equivalent premise background activities can still be matched when their codes differ across year-specific databases, without changing the existing background inventory lookup. Update economic optimization documentation and the implementation roadmap to describe name/location/product/unit based price assignment, the premise code stability issue, the cost-specific fallback behavior, and the status of the end-to-end notebook validation.
RWTH-LTT:main
…fetime and price assumptions
…ities ahead of bug fix merge progress on ethylene case study research
# Conflicts: # CHANGES.md # src/optimex/lca_processor.py
…n-fix Integrates RWTH-LTT#61, which fixes the lifetime installation-impact accounting for multi-year processes. Previously, production and operation-dependent flows were summed over the complete operation window in every calendar year. As a result, one installed unit could incorrectly deliver its entire lifetime production each year. This understated the required number of installed units and therefore undercounted construction and other installation-dependent impacts by up to the number of operating years. Resolves merge conflicts in CHANGES.md and lca_processor.py while retaining both the upstream background-activity lookup improvements and the fork's economic CAPEX/OPEX extensions. Migrates the ethylene case study to the new capacity semantics: existing_capacity now represents process units. The assumed annual Steam Cracker capacity remains 0.5e9 kg ethylene per vintage and is converted to 25e9 process units for a 50-year lifetime. Validation: - 78 tests passed and 3 were skipped - HiGHS was used locally because GLPK was unavailable - Notebook JSON and the brownfield conversion identity were statically verified
…thylene case study
…ng processes - Revised DAC model lifetime to 20 years based on Deutz and Bardow (2021). - Updated Steam Cracking lifetime to 25 years according to Tiggeloven (2026). - Adjusted PEM electrolysis lifetime to 25 years, incorporating AEC plant proxy. - Changed CO2 hydrogenation and MTO lifetimes to 25 years, referencing Tiggeloven. - Updated eCO2R reactor and separation lifetimes to 25 years, aligning with Tiggeloven proxies. - Modified assumptions documentation to reflect these changes and ensure consistency across notebooks and reports.
Adjust price handling in ethylene case study notebook - Drop rows with NaN prices before further processing
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