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[B-14.1.1 A study on the analysis of life-cycle CO₂ emission for technology assessment (Final Report)]

[Contact Person]

Yuichi Moriguchi
Team Head, Regional Environment Division,
National Institute for Environmental Studies, Environment Agency
16-2 Onogawa, Tsukuba, Ibaraki 305 Japan
Phone +81-298-50-2540, Fax +81-298-50-2570
E-mail moriguti@nies.go.jp

[Total Budget for FY1994-1996]

41,554,000 Yen (FY1996 13,667,000 Yen)

[Abstract]

　The purpose of the study is to compile a life-cycle CO₂ emission inventory as a common database for the assessment of technological measures to arrest global warming, and to conduct case studies on life-cycle analysis for selected technologies. A methodology to calculate CO₂ emission intensity of each sector of industry based on the Input-Output table was established, and a database of emission intensity was compiled using this method and published for wide use for LCA studies. The "Processing-Material ratio" method, which is a hybrid of Input-output analysis and process analysis, was proposed to estimate CO₂ emission associated with production of equipments and facilities based on material composition data. Life cycle emission of CO₂ was estimated for two case studies; firstly for district heating and cooling system reflecting the difference in density and size of heat demand, secondly for the comparison between a gasoline vehicle and an electric vehicle with different source of electricity. Net reduction of emission during transition period towards widespread of EV was also simulated.

[Key Words]

Carbon dioxide, Emission intensity, Life-cycle analysis, Input-output analysis, Electric vehicle