ANALYSIS ON LCA ACCURACY OF BUILDINGS

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  • KOBAYASHI Kensuke
    Assistant Prof., Dept. of Architecture, Faculty of Science and Technology, Tokyo Univ. of Science, Dr. Eng.
  • ISHIDA Shohei
    Graduate School, Dept. of Architecture, Faculty of Science and Technology, Tokyo Univ. of Science
  • KUBOMURA Takeo
    Graduate School, Dept. of Architecture, Faculty of Science and Technology, Tokyo Univ. of Science
  • TAHARA Kiyotaka
    Group Leader, Research Institute of Science for Safety and Sustainability, National Institute of Advanced Industrial Science and Technology, Dr. Eng.
  • KANEMATSU Manabu
    Assoc. Prof., Dept. of Architecture, Faculty of Science and Technology, Tokyo Univ. of Science, Dr. Eng.
  • INOUE Takashi
    Prof., Dept. of Architecture, Faculty of Science and Technology, Tokyo Univ. of Science, Dr. Eng.

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Other Title
  • 建築物のLCAにおける評価精度の検討
  • 建築物のLCAにおける評価精度の検討 : データの適合性が評価結果に及ぼす影響の分析
  • ケンチクブツ ノ LCA ニ オケル ヒョウカ セイド ノ ケントウ : データ ノ テキゴウセイ ガ ヒョウカ ケッカ ニ オヨボス エイキョウ ノ ブンセキ
  • Mismatches in adaptation of background data affecting LCA results
  • データの適合性が評価結果に及ぼす影響の分析

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Abstract

The study aimed to clarify LCA errors caused by mismatches in system boundaries of materials actually inputted and those of background database. In CO2 emissions from wooden housing materials in their manufacturing process, such mismatches were found in as many as 70% of the cases examined. By comparison with IDEA, similar emission compositions were obtained from AIJ-LCA database, verifying the latter's usefulness for overviewing emission characteristics. However, specific analyses showed occurrence of 0.5 - 2 times more errors in the 68% confidence interval if mismatched database figures used. The study suggested such database mismatches be carefully interpreted in LCA studies.

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