Sustainability Assessment of Industrialised and Conventional Renovation Pathways for Public Housing: Operational and Embodied Carbon Trade-Offs in a Stock-Level Study in the Comunitat Valenciana (Spain)
公共住宅の工業的および従来型改修経路の持続可能性評価：スペイン・バレンシア州のストックレベルにおける運用炭素と体化炭素のトレードオフ (AI 翻訳)
Cristina Jareño-Escudero, Eva Lucas-Segarra, Joan Romero-Clausell, Edward Castro-Kohnenkampf, Miriam Navarro-Escudero
🤖 gxceed AI 要約
日本語
スペインの公共住宅ストックを対象に、5つの工業的改修キットと5つの従来型改修を比較し、運用炭素と体化炭素のトレードオフを評価。炭素回収期間と累積排出削減量を分析し、短期的には低体化炭素の改修が有効だが、長期的には深い脱炭素改修が優れることを示した。電力脱炭素化の感度分析も実施。
English
This study compares five industrialised retrofit kits and five conventional renovation scenarios for a public housing stock in Spain, assessing trade-offs between operational and embodied carbon. It uses carbon payback and cumulative emissions metrics to show that low-embodied options provide early benefits while deep decarbonisation achieves stronger long-term outcomes, with sensitivity to grid decarbonisation.
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
日本でも既存住宅ストックの改修がGX政策の柱であり、本論文のストックレベルでの炭素トレードオフ分析手法は、日本の省エネ改修政策や補助金設計に示唆を与える。特に、運用改善と体化炭素のバランスを考慮した複合的な改修計画策定に有用。
In the global GX context
This paper provides a rigorous methodology for balancing operational and embodied carbon in building renovation planning at the stock level, which is highly relevant for global climate disclosure frameworks (e.g., TCFD, ISSB) that require lifecycle thinking. It highlights the need for portfolio-level strategies combining fast-payback and deep-retrofit measures to meet 2030/2050 milestones.
👥 読者別の含意
🔬研究者:Provides a reproducible method for combining operational and embodied carbon analysis in building stock modeling, with implications for lifecycle assessment methodology.
🏢実務担当者:Offers guidance for corporate sustainability teams on how to prioritize renovation investments considering carbon payback and cumulative impacts.
🏛政策担当者:Informs building code development and subsidy design that account for both upfront embodied carbon and long-term operational savings.
📄 Abstract（原文）
Sustainable renovation of existing residential building stocks is essential to reduce greenhouse gas emissions, improve energy performance, and support long-term climate-neutral housing strategies. However, decisions based only on operational indicators may overlook important product-stage embodied impacts, especially in highly integrated renovation solutions. This study evaluates how alternative renovation pathways for a public residential building portfolio in the Comunitat Valenciana (Spain) perform from a stock-level sustainability perspective, comparing five INFINITE industrialised retrofit kits (Kit 1–Kit 5) with five paired conventional renovation scenarios (S1–S5). A bottom-up building stock modelling workflow is applied, combining building-energy simulation to quantify operational performance and emissions (B6) with a screening life-cycle assessment of product-stage embodied carbon reported as GWP (A1–A3). To relate upfront and in-use impacts, the study computes carbon payback, cumulative emissions avoided, and a horizon-based partial life-cycle climate indicator, PLC(H), assessed for 2030, 2035, and 2050. The results show a clear sustainability trade-off: renovation packages that sharply reduce operational emissions often require higher upfront embodied carbon, shifting net climate benefits towards longer time horizons. Low-embodied options provide earlier benefits, with Kit 1 reducing PLC(H) by 15.5% by 2030, whereas deeper decarbonisation packages achieve stronger long-term outcomes, with S5 reducing PLC(H) by 70.7% by 2050. A bounded electricity-decarbonisation sensitivity further shows that these long-horizon rankings are affected by lower grid-emission factors, particularly for highly electrified pathways, although the strongest 2050 pathways remain robust across the tested cases. Overall, the findings show that sustainable stock-level renovation planning should jointly consider operational and embodied carbon, carbon payback, and milestone-based cumulative impacts in order to support balanced portfolio sequencing between broadly deployable fast-payback measures and selective deep retrofits.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.3390/su18094379first seen 2026-05-15 18:29:18
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