木造住宅の建設時のCO_2排出量削減を目指した対策と評価在来工法による木造戸建住宅の環境負荷予測に関する研究　その3

摘要

This paper focuses on how to reduce CO_2 emissions regarding construction materials. We compared section by section the amount of CQ> emissions from the four different houses. Next, we made an improved plan that took away the first floor that was constructed with reinforced concrete, as well as the interior decorations which emitted less CO_2 during their factory production. The following results were obtained.1) We determined which sections of the four houses had less construction waste. We determined which sections of the four houses emitted less CO_2 during their production.2) The total amount of CO_2 emissions per floor from construction materials is 318.8kg-CO_2/m~2~498. lkg-CO_2m~2. 3) The proposed countermeasure that took away the first floor reduced CO_2 emissions by 15.7xl(ykg-CO_2, a decrease of 30.4%.The proposed countermeasure that used the interior decorations, which emitted less CO_2 during their factory production, reduced CO_2 emissions by 5.1×10'kg-CO_2, a decrease of 9.9%.The countermeasure that the authors described in their improved plan reduced CO_2 emissions by 20.8×10~3kg-CO_2, a decrease of 40.3%.%1．はじめに住宅分野におけるCO_2排出量削減は重要な課題となっている。住宅のLCCO_2に着目すると住宅は長期にわたり使用されるため、住宅運用時のエネルギー消費に起因するCO_2排出量の占める割合が多くなる。そのため、住宅運用時のエネルギー消費量に関する調査研究や削減方法に関する研究が多数報告されている例えば。一方、住宅建設に起因するCO2排出量が我が国のCO2排出量の総量に占める割合は5．2％と推計されており、決して無視することができないことから、住宅建設に起因するCO_2排出量の削減方法について早急に検討する必要がある。