住宅建築時における投入資材のCO₂排出量の評価においてバックグラウンドデータの利用によって生じる誤差

建築物のLCAにおける評価精度の検討

抄録

 This study aimed to analyze LCA errors caused by the utilization of background data with a focus on: 1) errors caused by using different databases and 2) errors in database preparation and background data selection. The former analysis, where CO₂ emission intensities of housing were calculated and compared, showed that CO₂ emissions using AIJ-LCA (average) were up to 1.5 times as large as when using IDEA. Regarding the latter, error coefficients of variation (Cv) caused by data quality were calculated. The Cvs ranged from 0.1 to 0.7. This suggests using caution when interpreting building LCA results.