Quantification of energy related industrial eco-efficiency of China |
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Authors: | Jiansu Mao Yanchun Du Linyu Xu and Yong Zeng |
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Institution: | (1) Science, Technology & Society, Copernicus Institute, ECOFYS/Utrecht University, Heidelberglaan 2 3584 CS, Utrecht, The Netherlands;(2) L.S. Bernstein and Associates, LLC. 488 Kimberly Avenue, Asheville, NC 28804, USA;(3) Jadavpur University, Kolkata, 700032, India;(4) Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, USA;(5) ECOFYS, Langrabenstrasse 94, 90443 N?rnberg, Germany;(6) Present address: KfW, Palmengartenstrasse 5-9, 60325 Frankfurt/Main, Germany |
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Abstract: | Improving eco-efficiency is propitious for saving resources and reducing emissions, and has become a popular route to sustainable
development. We define two energy-related eco-efficiencies: energy efficiency (ENE) and greenhouse gas (GHG) emission-related
eco-efficiency (GEE) using energy consumption and the associated GHG emissions as the environmental impacts. Using statistical
data, we analyze China’s energy consumption and GHG emissions by industrial subsystem and sector, and estimate the ENE and
GEE values for China in 2007 as 4.871×107 US/PJ and 4.26×10 < sup > 8 < /sup > US/PJ and 4.26×108 US/TgCO2eq, respectively. Industry is the primary contributing subsystem of China’s economy, contributing 45.2% to the total economic
production, using 79.6% of the energy consumed, and generating 91.4% of the total GHG emissions. We distinguish the individual
contributions of the 39 industrial sectors to the national economy, overall energy consumption, and GHG emissions, and estimate
their energyrelated eco-efficiencies. The results show that although ferrous metal production contributes only 3.5% to the
national industrial economy, it consumes the most industrial energy (20% of total), contributes 16% to the total industrial
global warming potential (GWP), and ranks third in GHG emissions. The power and heat sector ranks first in GHG emissions and
contributes one-third of the total industrial GWP, although it only consumes about 8% of total industrial energy and, like
ferrous metal production, contributes 3.5% to the national economy. The ENE of the ferrous metal and power and heat sectors
are only 8 and 2.1×107 US/PJ, while the GEE for these two sectors are 9 and 4×10 < sup > 4 < /sup > US/PJ, while the GEE for these two sectors are 9 and 4×104 US/GgCO2eq, respectively; these are nearly the lowest ENE and GEE values among all 39 industry sectors. Finally, we discuss the possibility
of ecoefficiency improvement through a comparison with other countries. |
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