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ID: 132746

Comparative study of energy consumption and efficiency of Japan / Zhao, Yue; Ke, Jing; Ni, Chun Chun; McNeil, Michael

McNeil, Michael	Journal Article
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2014.

Summary/Abstract

The industrial sector consumes about 50% of the world×s delivered energy and thus has a large impact on the world×s energy production and consumption. Japan is one of the leading countries in industrial efficiency while China is the world×s largest industrial energy consumer. This study analyzes the energy consumption and efficiency of the Japanese and Chinese manufacturing industry. Analysis shows that the energy intensity of both Japanese and Chinese manufacturing industry has decreased significantly. Decomposition analysis shows that the efficiency effect played an important role in reducing energy intensity; improvement of the energy efficiency of both Japanese and Chinese manufacturing industry showed a trend of exponential decay. Structural effect significantly reduced the energy intensity of the Japanese manufacturing industry while having a relatively small influence on the energy intensity of the Chinese manufacturing industry. Our analysis also shows a strong association of industrial energy efficiency improvement with energy policies, highlighting that energy efficiency policies can play an important role in the reduction of industrial energy intensity. The results of this study also underscore the important, yet very challenging, task of achieving structural change to further improve efficiency.

Key Words

Japan ; China ; Energy Policy ; Energy Consumption ; Industry ; Energy Efficiency ;
Manufacturing Industry ; Energy Policies ; Japan and China Energy Consumption ; Realizing Structure

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ID: 113486

Potential energy savings and CO2 emissions reduction of China's / Ke, Jing; Zheng, Nina; Fridley, David; Price, Lynn

Price, Lynn	Journal Article
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Publication

2012.

Summary/Abstract

This study analyzes current energy and carbon dioxide (CO2) emission trends in China's cement industry as the basis for modeling different levels of cement production and rates of efficiency improvement and carbon reduction in 2011-2030. Three cement output projections are developed based on analyses of historical production and physical and macroeconomic drivers. For each of these three production projections, energy savings and CO2 emission reduction potentials are estimated in a best practice scenario and two continuous improvement scenarios relative to a frozen scenario. The results reveal the potential for cumulative final energy savings of 27.1 to 37.5 exajoules and energy-related direct emission reductions of 3.2 to 4.4 gigatonnes in 2011-2030 under the best practice scenarios. The continuous improvement scenarios produce cumulative final energy savings of 6.0 to 18.9 exajoules and reduce CO2 emissions by 1.0 to 2.4 gigatonnes. This analysis highlights that increasing energy efficiency is the most important policy measure for reducing the cement industry's energy and emissions intensity, given the current state of the industry and the unlikelihood of significant carbon capture and storage before 2030. In addition, policies to reduce total cement production offer the most direct way of reducing total energy consumption and CO2 emissions.

Key Words

Energy Efficiency ; Emissions Reduction ; Cement Industry

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