Energy consumption and potential of energy-saving of China based on industry classifications

The present study involved two key procedures: (1) Input-output table including energy consumption is built and some parameters, such as coefficient of industrial correlation, energy consumption per unit of output value and elasticity ratio of energy consumption, are calculated. (2)Based on characteristics of industrial correlation and energy consumption four industry classes (I, II, III, IV) are sorted. I includes the first industry, the third industry and construction. II includes mining, chemical industry, manufacture of metal products, electric power, gas and water production and supply. III includes manufactures of foods, of textile, of machinery for cultural activity and office work, of artwork and so on. IV includes manufactures of wearing apparel, of electrical machinery and equipment, of communication equipment, computers and other electronic equipment. Such classification is given to find out characteristics of energy consumption and potential of energy-saving in previous and future by industry classes and energy types. According to the analysis data during 1997-2007, forecast the coefficient of industrial correlation and energy consumptions of industries in 2010 and 2020. The records indicated that energy consumptions per unit of output value in four industry classes have decreased widely, especially II has a remarkable decrease. Industry classes have different characteristics and amount in different kinds of energy consumption. Among all these energies, coal, crude oil, gasoline, diesel oil, natural gas and electricity have the potential of energy-saving. The industry classes II and I have the potential of energy-saving.