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Sensitivity analysis of embodied carbon and energy of buildings via different environmental product declarations

異なる環境製品宣言を用いた建物の体化炭素とエネルギーの感度分析 (AI 翻訳)

Tuğba Erzurum, Önder Halis Bettemir

Revista de la Construcción📚 査読済 / ジャーナル2026-08-08#炭素会計対象セクター: construction
DOI: 10.7764/rdlc.25.2.418
原典: https://revistadelaconstruccion.uc.cl/index.php/RDLC/article/download/97994/76987
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🤖 gxceed AI 要約

日本語

本研究は、異なるブランドの環境製品宣言（EPD）を用いた場合の建物の体化炭素（EC）と体化エネルギー（EE）の不確実性をモンテカルロシミュレーションで分析した。住宅と大学建物の2タイプを対象に、287件のEPDデータを収集し、変動係数はEEで約11%、ECで約9%と算出された。ECとEEは正の相関（0.66-0.73）を示し、EPD選択により環境影響値が約10%変動し得ることを明らかにした。

English

This study analyzes the uncertainty in embodied carbon (EC) and energy (EE) of buildings when using different brands of Environmental Product Declarations (EPDs). Monte Carlo simulations on residential and university buildings with 287 EPDs show coefficients of variation around 11% for EE and 9% for EC, with positive correlation (0.66-0.73). Results indicate that EPD selection can cause about 10% deviation in environmental impact values.

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

日本では、建築物の環境影響評価や脱炭素化に向けて、EPDの活用が進められています。本研究は、EPDデータのばらつきが建物の炭素評価に与える影響を定量化しており、日本の建築業界におけるLCAやカーボンフットプリントの精度向上に示唆を与えます。

In the global GX context

Globally, EPDs are increasingly used for building sustainability assessments and carbon accounting. This study highlights the variability in EPD data and its impact on building-level embodied carbon calculations, which is relevant for international standards like EN 15978 and LEED, and for improving the reliability of carbon footprint reporting.

👥 読者別の含意

🔬研究者:Provides quantitative evidence on EPD variability and its impact on building LCA, useful for refining uncertainty analysis methods.

🏢実務担当者:Highlights the need for careful EPD selection in building projects to ensure accurate carbon footprint reporting.

🏛政策担当者:Suggests the importance of standardizing EPD data to reduce uncertainty in building carbon assessments.

📄 Abstract（原文）

Utilization of Environmental product declarations of different brands of the same construction material may end up with diverse environmental impact results. Aforementioned variability is not thoroughly investigated in building level in the literature. This study addresses this literature gap by conducting uncertainty analyses on two different types of structures; residential and university buildings by Monte-Carlo Simulation (MCS). The analyses were carried out based on embodied carbon (EC) and embodied energy (EE) values obtained from Environmental Product Declaration (EPD) documents. To conduct the sensitivity analysis, 287 EPD documents related to construction materials were collected; 242 of these were used for university buildings and 177 for residential buildings. The residential building consists of materials such as reinforced concrete frame system, aerated concrete walls, paint, PVC door and window frames, as well as tile roof. The university building consists of materials such as terrace roof, aluminum facade, suspended ceiling, and reinforced concrete frame structure. The collected EPD documents are randomly assigned to the corresponding construction materials. The coefficients of variation for the university building are found to be 11.58% for EE and 8.86% for EC, while for the residential building they are 11.10% for EE and 8.9% for EC. The correlation between EE and EC were computed as 0.7312 for educational and 0.6623 for residential buildings, respectively. The analysis results demonstrated 2 outputs; first, the computed environmental impact values may deviate within 10% based on the utilized EPD documents and second, EE and EC are positively correlated.

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