LCA・環境価格・コスト分析を用いたワイヤアーク積層造形（WAAM）と純粋機械加工の持続可能性比較：低炭素鋼管レデューサを対象としたケーススタディ
Sustainability comparison of wire arc additive manufacturing (WAAM) and pure machining using LCA, environmental prices and cost analysis: a case study on a low carbon steel pipe reducer (原題)
Mohammad Mahdi Tavallaei, Hossein Feiz Arefy, Mahdi Mazloom Farsibaf, Farhad Kolahan, Amirmohammad Ghandehariun
🤖 gxceed AI 要約
日本語
低炭素鋼の偏心管レデューサを対象に、WAAMと純粋機械加工をクレードル・トゥ・ゲートLCA（ReCiPe 2016）、環境価格による外部費用の貨幣換算、ライフサイクルコスティング、モンテカルロ法で比較した研究。WAAMは材料廃棄を61%、水消費を60%、地球温暖化ポテンシャルを45%削減し、外部社会費用も10%低減した。一方で微小粒子状物質形成と陸域生態毒性は増加し、集煙管理の必要性を示す。500FU/年の基準条件では約6%の運用コスト優位性が確認された。
English
This study compares WAAM with pure machining for a low-carbon steel eccentric pipe reducer using cradle-to-gate LCA (ReCiPe 2016), Environmental Prices monetization, life cycle costing, and Monte Carlo simulation. WAAM cut material waste by 61%, water use by 60%, and global warming potential by 45%, lowering external societal costs by 10%. However, fine particulate matter formation rose 33% and terrestrial ecotoxicity 88%, requiring targeted fume management. At 500 functional units/year, WAAM showed an approximately 6% operating cost advantage.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
製造プロセスの脱炭素化をLCAと環境価格で定量化する手法は、SSBJ・有報でのScope 3算定や製品カーボンフットプリント開示を進める日本製造業にとって参考になる。特に積層造形による材料ロス削減は、サプライチェーン全体の排出削減策として実務的に示唆が大きい。
In the global GX context
The integration of LCA, monetized environmental prices, and life cycle costing offers a template for quantifying process-level decarbonization that aligns with Scope 3 accounting under ISSB/CSRD. The finding that additive manufacturing shifts burdens toward air quality and ecotoxicity underscores the need for multi-impact disclosure rather than carbon-only metrics.
👥 読者別の含意
🔬研究者:LCA・環境価格・LCCを統合した不確実性評価の枠組みは、製造プロセス比較研究の方法論的参照になる。
🏢実務担当者:積層造形への転換が材料ロス・水・CO2削減と運用コスト優位をもたらす一方、粉塵・生態毒性対策の投資が必要であることを示す。
🏛政策担当者:製造業の脱炭素化支援策を設計する際、炭素以外の環境影響や集煙設備などの付随コストも考慮すべき根拠を提供する。
📄 Abstract（原文）
Abstract Manufacturing complex steel components by pure machining generates substantial material waste and requires considerable energy, motivating a shift toward near net shape technologies. Although Wire Arc Additive Manufacturing (WAAM) is a promising alternative, the literature lacks integrated, high fidelity assessments that address the economic and environmental uncertainties associated with industrial adoption. This study compares WAAM with pure machining for a low carbon steel eccentric pipe reducer measuring 77 mm in lower diameter, 73 mm in height, and 40 mm in upper diameter. The assessment integrates a cradle to gate Life Cycle Assessment (LCA) based on ReCiPe 2016 Midpoint (H) and Endpoint (H), Environmental Prices to monetize external societal costs in a single monetary score, Life Cycle Costing (LCC) to evaluate economic feasibility, and Monte Carlo simulation to assess uncertainty. WAAM reduced material waste by 61%, water consumption by 60%, and global warming potential by 45%. It also reduced impacts in eight other categories, including land use by 89% and marine eutrophication by 92%. However, WAAM increased fine particulate matter formation by 33% and terrestrial ecotoxicity by 88%, indicating a need for targeted fume management. Environmental Prices showed that WAAM reduced external societal costs by 10%, from 1.72 to 1.55 USD per unit. At the reference condition of 500 FU per year and ten substrate reuse cycles, WAAM achieved an approximately 6% deterministic operating cost advantage. The Monte Carlo simulation for 500 FU also indicated a narrower 90% confidence interval for WAAM, from 1551 to 1862 USD, than for machining, from 1490 to 2061 USD. These findings indicate that WAAM is a technically feasible option with substantial environmental benefits and potential operating cost advantages for the investigated component.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1088/2631-8695/aeba3cfirst seen 2026-10-29 04:51:11 · last seen 2026-11-06 04:52:34
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