Intensity Calculation Using Input-Output Table and Case Study Regarding Embodied Energy/CO2 in Japan

• Published in: Tu mu gong cheng yu jian zhu 2015-03, Vol.9 (3), p.321-330
• Main Author: Makoto Yamamoto Keizo Yokoyama Noriyoshi Yokoo Tatsuo Oka Takao Sawachi
• Format: Article
• Language: English
• Subjects: CO2; 二氧化碳排放量; 投入产出表; 日本; 欧洲经济共同体; 碳排放强度; 能源消耗; 计算
• ISSN: 1934-7359; 1934-7367
• DOI: 10.17265/1934-7359/2015.03.010

The objective of this research is to quantify the EEC （embodied energy/CO2） of a building. The EEC represents the energy consumption and CO2 emissions at individual phases of a building＇s life-cycle, such as construction （including manufacture of materials and equipment）, renewal （including repair work） and demolition. Energy and CO2 emission intensities in terms of 401 sectors were calculated, using the 2005 I-O （input-output） table in Japan. According to our case study conducted from the construction phase to demolition, the EC （embodied CO2） of an office building used for 60 years is 12,044 t-CO2 and 1,093 kg-CO2/m^2 in total. CO2 equivalent emissions （CO2e） by Freon gases, contained in building materials, equipment and devices, were also calculated. As the results, CO2e by insulators was 2% of the building＇s EC and CO2e by refrigerants was 9%-12% of the building＇s EC. It is important to keep reducing emissions of Freon gases contained in refrigerators.