Extended exergy analysis of urban socioeconomic system: a case study of Beijing, 1996-2006

In this study, a temporal analysis based on extended exergy is conducted for the urban system. The exchange and utilisation of resources, products and labour forces among seven sectors and the environment are quantified. Three new indicators are proposed to measure the resource utilisation efficiency, input/output structure and environmental impact of Beijing during 1996-2006. The following conclusions can be derived: the industrial structure has been updated as the one with more economic value added; the external dependence degree of Ag-sector has significantly increased, suggesting a modernised agricultural production mode despite of the intensive production and negative externalities; the exergy efficiencies of Ex-and Co-sectors are similar to those of Norway, Italy, UK and the province of Siena, and those of Te-sector kept increasing. The results also suggest that extended exergy analysis could be refined to become a tool for efficiency assessment, structural regulation and environmental management.

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