• 研究报告 •

### 全球电力碳足迹及其当量因子测算

1. (1荷兰莱顿大学环境科学系， 莱顿 2333CC； 2吉林大学环境与资源学院， 长春 130012)
• 出版日期:2012-12-10 发布日期:2012-12-10

### Carbon footprint of global electricity and its equivalent calculation.

FANG Kai1，2, ZHU Xiao-juan2, GAO Kai2, SHEN Wan-bin2**

1. (1Institute of Environmental Sciences, Leiden University, Leiden 2333CC, Netherlands; 2College of Environment and Resources, Jilin University, Changchun 130012, China)
• Online:2012-12-10 Published:2012-12-10

Abstract: Carbon footprint of electricity is a measurement of the amount of life cycle CO2 emission associated with the whole process of power generation. From the perspective of global carbon cycle,  the characteristics of carbon emission from different power generations are partially the land cover’s carbon sequestration capacity. This paper calculated the average carbon footprint equivalent of global electricity, i.e., the life cycle carbon footprint for per unit of electricity consumed, and analyzed the composition of  carbon footprint of global electricity and its changes in 2000-2008, based on the synthesis of large amount of investigation data. The worldaverage global carbon footprint equivalents of coal, oil, and natural gas used for thermal electricity generation, and of hydroelectricity and nuclear electricity were 131.3×10-6, 95.8×10-6, 56.6×10-6, 38.8×10-6, 1.9×10-6 hm2·(kW·h)-1, respectively, indicating that the environmental impact of thermal electricity, especially coal-based electricity, was significantly greater than that of hydroelectricity and nuclear electricity. From 2000 to 2008, the carbon footprint of global electricity increased from 730.7×106 hm2 to 1101.8×106 hm2, in which, the proportion of thermal electricity increased from 60.0% to 68.1%, in particular coal replaced oil to be the largest source of the carbon footprint of thermal electricity, while the proportion of hydroelectricity and nuclear electricity fell to 30.7% and 1.3%, respectively. Overall, the structure of global electricity revealed a trend towards deterioration, for the worldaverage carbon emission coefficient of electricity increased from 265.8×10-3 kg·(kW·h)-1 in 2000 to 315.4×10-3 kg·(kW·h)-1 in 2008. The results highlight the need for reducing the use of thermal electricity, especially coalbased electricity, which largely determines the intensity and scale of carbon emission from power generation.