Environmental efficiency analysis of China's coal-fired power plants considering heterogeneity in power generation company groups
Environmental efficiency analysis of China's coal-fired power plants considering heterogeneity in power generation company groups
复制标题
DOI：
10.1016/j.eneco.2021.105511
复制
发表时间：
2021-09-09
期刊：
影响因子：
12.8
通讯作者：
Eguchi, Shogo
中科院分区：
文献类型：
--
作者：
Nakaishi, Tomoaki;Takayabu, Hirotaka;Eguchi, Shogo
本研究对中国104家燃煤电厂进行了环境效率分析，同时考虑了生产过程中产生的多种不良排放（CO2、SO2、NOx和PM2.5排放）以及五家主要发电公司（大唐、国电、华电、华能和电投）之间差异造成的异质性。在实证研究中，采用基于松弛的数据包络分析（DEA）来调查每个发电厂的“总体”和单独的CO2、SO2、NOx和PM2.5“特定”环境低效率得分。这些分数使我们能够确定哪些不良产出是每家公司和发电厂总体环境效率低下的主要根源。结果表明，低效的 PM2.5 和 SO2 排放是许多工厂环境效率低下的主要根源。此外，采用元前沿DEA分解框架来识别每个电厂总体环境效率低下的根源是否是由于五家主要发电公司之间的技术差距或同一发电公司内部的管理差距。结果表明，在大多数情况下，同一发电公司内部的管理差距在每个发电厂的总体环境效率低下所占的比例较大。这些研究结果为政府和企业管理者提供全面的政策建议，以提高发电厂的环境效率。
This study conducts an environmental efficiency analysis of 104 coal-fired power plants in China by simultaneously considering multiple undesirable outputs (CO2, SO2, NOx, and PM2.5 emissions) generated during the production process and the heterogeneity caused by differences between the five major power generation companies (Datang, Guodian, Huadian, Huaneng, and Power Investment). In the empirical study, slacks-based data envelopment analysis (DEA) was employed to investigate the "total" and individual CO2, SO2, NOx, and PM2.5 "specific" environmental inefficiency scores for each power plant. These scores allow us to identify which undesirable outputs are the main sources of total environmental inefficiency for each company and power plant. The results show that inefficient PM2.5 and SO2 emissions are the main sources of environmental inefficiency for many plants. Furthermore, a meta-frontier DEA decomposition framework is adopted to identify whether the source of total environmental inefficiency for each power plant is due to technological gaps between the five major power generation companies or managerial gaps within the same power generation company. The results imply that, in most cases, managerial gaps within the same power generation company account for a larger proportion of total environmental inefficiency for each power plant. These findings are used to provide comprehensive policy suggestions for government and corporate managers to improve the environmental efficiency of power plants.