From Building Services to Process Loads: Whole-Building Utility-Calibrated Simulation of Sustainable Operational Decarbonisation Limits in a UK SME Restaurant Retrofit
建物サービスからプロセス負荷へ：英国SMEレストランの改修におけるサステナブルな運用脱炭素化限界の全建物ユーティリティ校正シミュレーション (AI 翻訳)
Harshul Singhal, Ali Badiei
🤖 gxceed AI 要約
日本語
本論文は、ロンドンのレストラン（655.82m²）を対象に、OpenStudio/EnergyPlusを用いた全建物ユーティリティ校正シミュレーションを実施。断熱、複層ガラス、LED照明、ヒートポンプ、太陽光発電などのシナリオを分析し、ベースラインの炭素排出量75,020kgCO2e/年から最大24%削減可能であることを示した。しかし、厨房や給湯などのプロセス負荷は建物改修だけでは削減できず、残存負荷指数（RLI）が0.57から0.74に上昇し、改修後もプロセス負荷が支配的であることを明らかにした。
English
This paper presents a utility-calibrated whole-building simulation of a London restaurant (655.82 m²) using OpenStudio/EnergyPlus. Scenarios including insulation, glazing, LED lighting, heat pumps, and PV were tested, achieving up to 24% reduction in operational carbon from a baseline of 75,020 kgCO2e/yr. However, process loads (catering, kitchen ventilation, etc.) remained dominant, with the Residual-Load Index rising from 0.57 to 0.74, indicating a decarbonisation ceiling beyond building retrofits alone.
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
日本の外食産業（特に中小規模のレストラン）においても、建物躯体の改修だけでは脱炭素化に限界があることが示唆される。本論文で提案された残存負荷指数（RLI）は、日本でのサブメータリングや需要応答戦略の導入を検討する際の参考となる。
In the global GX context
This study provides quantitative evidence of a decarbonisation ceiling in high-process-load buildings, challenging the assumption that building fabric and services retrofits alone can achieve net-zero. The Residual-Load Index offers a transferable metric for sub-sector-specific policies, relevant to global hospitality decarbonisation efforts.
👥 読者別の含意
🔬研究者:The Residual-Load Index and utility-calibrated simulation methodology offer a replicable framework for analysing decarbonisation limits in other high-process-load building types.
🏢実務担当者:Restaurant operators can use the findings to prioritise investments beyond building fabric, such as kitchen equipment upgrades and sub-metering, to achieve deeper decarbonisation.
🏛政策担当者:The paper highlights the need for sub-sector-specific retrofit policies that address process loads, not just building envelope and services.
📄 Abstract（原文）
Restaurants combine long opening hours, catering demand, kitchen ventilation, DHW, and mixed-fuel cooking loads, making their decarbonisation different from generic commercial retrofit. For small- and medium-sized enterprise (SME) hospitality premises, this makes the transition to net-zero operation a distinct sustainability challenge because a large, process-driven share of demand lies outside conventional building-fabric and building-services retrofit. This single-case study develops a whole-building utility-calibrated OpenStudio/EnergyPlus model for Beit El Zaytoun, a 655.82 m2 restaurant in Park Royal, London. Monthly electricity and gas data for June 2024–May 2025 were used to calibrate the baseline at whole-building level. Standalone and cumulative scenarios tested insulation, low-emissivity double glazing, LED lighting and controls, ASHP service scenarios, and an 11 kWp PV array. Baseline demand was 413,895 kWh/yr, equivalent to 631.1 kWh/m2·yr and 75,020 kgCO2e/yr. The lowest-net-energy analytical package reduced net imported energy to 314,734 kWh/yr and operational carbon to 56,700 kgCO2e/yr, a retained 24.0% reduction on the source reporting basis; this package is treated as an analytical bound rather than as a final design recommendation because it excludes cooling. The model-derived residual process load, kitchen and catering gas plus kitchen, and back-of-house electricity remained 233,920 kWh/yr across building-focused scenarios. The Residual-Load Index (RLI) rose from 0.57 to 0.74; with ±15% process-load allocation uncertainty, the optimised RLI range was 0.63–0.85, so the post-retrofit balance remained process-load dominated. The case demonstrates a practical decarbonisation ceiling likely to recur in similar high-process-load hospitality premises: fabric, lighting, heat electrification, and PV are necessary but insufficient without catering-equipment, cooking-fuel, kitchen-ventilation, refrigeration-control, sub-metering, and demand-response strategies. The paper contributes whole-building utility-calibrated quantitative evidence and a transferable RLI metric for sub-sector-specific sustainable retrofit policy, and the net-zero transition of SME food-service premises.
🔗 Provenance — このレコードを発見したソース
- crossref https://doi.org/10.3390/su18136517first seen 2026-06-27 05:37:34
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