A Carbon Emission Accounting Method for Engineering Materials and Key Equipment in 110 kV Power Relocation Projects

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides a replicable method for project-level LCA carbon accounting in power engineering, with component-level hotspot analysis.

🏢実務担当者:Offers a practical framework to translate bill-of-quantities into carbon inventories for low-carbon procurement in transmission projects.

🏛政策担当者:Highlights the need for standardized project-level carbon accounting methods to support infrastructure decarbonization policies.

Power transmission and transformation projects involve substantial quantities of engineering materials and key equipment with significant embodied carbon emissions, yet project-level carbon accounting methods remain insufficiently tailored to power engineering practices. This study takes a 110 kV transmission and transformation relocation project as a case study and develops a bill-of-quantities-based life-cycle carbon emission accounting method. The accounting scope covers civil engineering materials, cable systems, gas-insulated switchgear (GIS), and other key engineering components, and the carbon reduction potential of low-carbon material and equipment substitution is further evaluated. The proposed framework integrates engineering decomposition, hierarchical mapping from bill-of-quantities items to material and equipment inventories, component-level carbon factor modeling, carbon factor consistency calibration, and carbon-cost dual-objective scenario analysis. A cradle-to-grave boundary is adopted, covering material production (A1–A3), transportation (A4), construction (A5), operation and maintenance (B), and end-of-life treatment with recycling credits (C). Compared with conventional project-level carbon accounting that first aggregates engineering quantities into a flat material list, the proposed method preserves the bill-of-quantities hierarchy during inventory translation and assigns life-cycle modules at the item-to-component conversion step. This improves traceability from engineering packages to carbon hotspots and makes the accounting results more directly usable for procurement-oriented low-carbon decisions. The baseline case yields a net life-cycle carbon footprint of 455.5 t CO2e, with material production contributing 305.2 t CO2e (67.0%) and operation and maintenance contributing 147.2 t CO2e (32.3%). At the component level, 110 kV XLPE cables and SF6-related impacts dominate, accounting for 31.8% and 27.1% of the total, respectively. Individual substitution measures reduce emissions by 3.1–16.5%, while the combined strategy lowers the footprint to 355.8 t CO2e, achieving a 21.9% reduction with a 7.2% cost increase. The results demonstrate that the proposed method can effectively translate engineering quantity documents into traceable project-level life-cycle carbon accounting results, providing support for low-carbon material selection, equipment procurement, and early-stage decision making in 110 kV transmission and transformation relocation projects.

• openalex https://doi.org/10.3390/app16167886first seen 2026-08-12 04:58:15