The changes in coal intensity of electricity generation in Chinese coal-fired power plants

Wang, Chunhua; Cao, Xiaoyong; Mao, Jie; Qin, Ping

doi:10.1016/j.eneco.2019.01.032

Cited by 38 publications

(23 citation statements)

References 20 publications

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“…Wang et al [10] analyzed the changes in coal intensity using the data for 389 coal-fired thermal power plants from 2009 to 2012 in China. They found that power plants located in central China achieved the most significant improvement in coal intensity and smaller power plants experienced higher improvement in coal intensity during the study period.…”

Section: Introductionmentioning

confidence: 99%

“…They found that power plants located in central China achieved the most significant improvement in coal intensity and smaller power plants experienced higher improvement in coal intensity during the study period. However, Wang et al [10] analyzed the "average" changes in coal intensity for each group classified by production scale and region using a traditional DEA framework with an assumption of sole frontier technology. The impact of the difference in the production scale and regional heterogeneity on the power generation efficiency for individual power plants has not been studied to date to the best of our knowledge.…”

Section: Introductionmentioning

confidence: 99%

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Sources of inefficient power generation by coal-fired thermal power plants in China: A metafrontier DEA decomposition approach

Eguchi

Takayabu

Lin

2021

Renewable and Sustainable Energy Reviews

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China is the world's largest CO2 emitting country and coal-fired thermal power generation accounted for over 50% of total electricity generation in China in 2015. This study reports the changes in power generation efficiency of coal-fired thermal power plants in China from 2009 to 2011 and how the differences in the production scale of the power plants and regional heterogeneity affect the power generation efficiency. We propose a metafrontier data envelopment analysis (DEA) decomposition framework to investigate the sources of inefficiency in power generation. The results suggest that on average, power generation efficiency of the large-scale power plants is 13% higher than that of the small-scale power plants. Although operational inefficiency is the main source of inefficiency in eastern and central China, the technology gap-the differences in the quality of coal consumed for electricity production and in the equipment of the power plants among the regions is the main source of inefficiency in western China. This study uses the results of the framework to discuss the scrapping policies for the coal-fired thermal power plants in China. For large-scale power plants in western China, the components of inefficiency vary and thus policymakers should consider scrapping the thermal power plants based not only on the level of inefficiency but also on its components.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sources of inefficient power generation by coal-fired thermal power plants in China: A metafrontier DEA decomposition approach

Eguchi

Takayabu

Lin

2021

Renewable and Sustainable Energy Reviews

View full text Add to dashboard Cite

show abstract

“…This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. (Wang et al, 2019). The huge fossil energy consumption and increasing industrialization make China the top globally among emitters of anthropogenic atmospheric pollutants , which has become a major threat to public health, leading to approximately 350,000 to 1 million premature deaths in recent years (Chen et al, 2013;Cohen et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…Since 2001, the usage of coal has kept growing at an annual rate of 6.3% as the main source of sulfur dioxide (SO 2 ) and nitrogen oxides (NO x ) emissions (NBS, ). China is currently the largest coal consumer worldwide and consumed 3.85 billion tons of coal in 2016, accounting for 62% of national energy consumption (Wang et al, ). The huge fossil energy consumption and increasing industrialization make China the top globally among emitters of anthropogenic atmospheric pollutants (Zheng et al, ), which has become a major threat to public health, leading to approximately 350,000 to 1 million premature deaths in recent years (Chen et al, ; Cohen et al, ).…”

Section: Introductionmentioning

confidence: 99%

China's Trade‐Off Between Economic Benefits and Sulfur Dioxide Emissions in Changing Global Trade

Wang

Zhang

et al. 2020

Earth's Future

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China has been suffering from air quality degradation since its ascension into the World Trade Organization in 2001. The unequal exchange that occurs with international trade—that is, developed countries obtaining larger shares of trade‐related value added relative to the shares of trade‐related air pollution incurred locally—may obstruct the greening of global supply chains. In this study, we conduct a multi‐regional input‐output analysis to examine the change in the distribution of economic benefits and sulfur dioxide emissions underlying China's international trade from 2002 to 2015. The results show that both net trade‐related economic benefits and SO2 emissions in China rapidly increased from 2002 to 2007 and then decelerated after 2007 due to changes in China's green development strategy. In the past 13 years, China has suffered from economic‐environmental inequality due to trade with most developed countries, for example, the United States, the European Union, East Asia, and Canada. East Asia, particularly Japan and South Korea, became both an economic and environmental winner while trading with China in 2015. China has also outsourced emissions to less developed regions, such as Sub‐Saharan Africa. We propose policy implications to further reduce the economic‐environmental inequality underlying China's international trade.

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“…This proportion will be reduced to 40% by 2040 to mitigate the energy crisis and reduce pollutant emissions. 1 China’s growing energy needs are increasingly met by renewables while the coal demand is decreasing, which implies that coal-fired power plants need to improve their ability to utilize fossil fuels in a flexible and efficient manner. High-quality combustion control systems for coal-fired utility boilers keep the primary process variables at optimal levels so that the boiler operates with high efficiency and produces low emissions.…”

Section: Introductionmentioning

confidence: 99%

A Control Strategy of the Air Flow Rate of Coal-Fired Utility Boilers Based on the Load Demand

Liu¹,

Liu

Shi³

et al. 2020

ACS Omega

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An analysis was conducted on the relationship between the calorific value of different types of coal and the theoretical air requirement. It was found that the theoretical air volume required for generating the same amount of heat during combustion is the same for different types of coal. The concept of the air/coal ratio was improved by proposing the concept of the air/carbon ratio, which refers to the ratio of the mass of air to the mass of carbon during complete combustion; the ratio is approximately 11.5 kg/kg (mass ratio), being roughly constant for different types of coal, unlike the air/coal ratio showing a significant change with coal types. The total air flow rate in a boiler changed with load demand, and the influence of different fuel types can be neglected at the same load level. On this basis, an air flow rate control strategy for coal-fired utility boilers was proposed and implemented in the boiler in which the air flow rate required to the furnace is a function of the unit load. Experiments conducted in a 300 MWe coal-fired utility boiler confirm that the use of the control strategy of the air flow rate for the combustion optimization improves the stability of the main steam pressure and mitigates the fluctuations of the coal flow. These results provide a foundation for the implementation of a new strategy of air/coal decoupling and independent control of boiler combustion.

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The changes in coal intensity of electricity generation in Chinese coal-fired power plants

Cited by 38 publications

References 20 publications

Sources of inefficient power generation by coal-fired thermal power plants in China: A metafrontier DEA decomposition approach

Sources of inefficient power generation by coal-fired thermal power plants in China: A metafrontier DEA decomposition approach

China's Trade‐Off Between Economic Benefits and Sulfur Dioxide Emissions in Changing Global Trade

A Control Strategy of the Air Flow Rate of Coal-Fired Utility Boilers Based on the Load Demand

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