Chinese Industry And Its 36 Sub-sectors Of Energy Efficiency Research

China has become the world's biggest energy consumer after taking the place of the United States in 2010, which has emitted tremendous carbon dioxide and become the world's largest carbon emitter. Chinese government has realized that China has faced the situation of tight resource constraints and environmental deterioration, and has made a series of energy-saving and carbon emission reduction targets. In the structure of China's energy consumption, the industry has taken great share. The energy utilization efficiency of China is low compared with developed countries, because of the industry development with high energy consumption, high emissions and high pollution.With the fact that improving energy efficiency is a necessary means of energy saving and carbon emission reduction, and the effect of energy-saving and emission reduction in the industry has great influence in the whole country, this paper studies the energy efficiency and its change in China's whole industry and its 36 sub-industries, and uses a single-factor energy efficiency index(i.e. energy intensity) to represent the energy efficiency in China's industry, Besides, this paper decomposes the China industrial energy consumption by multi-level index decomposition analysis method and captures the main factors influencing China's industrial energy consumption. What's more, this paper estimates the total-factor energy efficiency of China's industry and the 36 sub-sectors using data envelopment analysis method. The empirical results indicate that:The energy intensity in China's whole industry generally shows the decline trend, and declines greatly. The energy intensity of most sub-sectors shows the decline trend. Besides, the energy intensity of Manufacture of Foods, Manufacture of Medicines, Manufacture of Special Purpose Machinery, Manufacture of Computers, Communication and Other Electronic Equipment, and Production and Supply of Gas shows great decline trend. The energy intensity of Extraction of Petroleum and Natural Gas, Processing of Petroleum, Coking and Processing of Nuclear Fuel and Production and Supply of Water show no evident decline trend. The high energy-intensive sub-sectors are Extraction of Petroleum and Natural Gas, Processing of Petroleum, Coking and Processing of Nuclear Fuel, Production and Supply of Water, Smelting and Pressing of Ferrous Metals and Production and Supply of Gas. Also, the economic growth in China's industry is the main factor contributing to industrial energy consumption, while the energy intensity reduction and structure shifts across industrial sub-sector are the dominant cause of slowing down the growth of industrial energy consumption. What's more, the total-factor energy efficiency of China's whole country generally shows the increase trend, and approaches to 1 in 2012. The trends of total-factor energy efficiency and energy intensity both show that the energy efficiency of China's industry show the consistent trend in general, while there exists difference. And the total-factor energy efficiency of most sub-sectors show the increase trend in general ad time goes by. The total-factor energy efficiency of Mining and Processing of Ferrous Metal Ores, Manufacture of Textile, Wearing Apparel and Accessories, Manufacture of Leather, Fur, Feather and Related Products and Footwear, Processing of Petroleum, Coking and Processing of Nuclear Fuel and Production and Supply of Water show large fluctuation, and there is not evident increase trend.