Evaluation and analysis of carbon emission reduction effectiveness of energy enterprises based on improved DEA model
In order to improve the accuracy and rationality of carbon emission reduction efficiency evaluation for large energy enterpri-ses,and to address the uncertainty issues of expected output and unexpected output ratio changes,unexpected output,dynamic changes,and fuzzy inputs in the evaluation process,an improved DEA model was constructed using the super efficiency SBM DEA model,Malmquist index,and interval type Ⅱ fuzzy numbers to evaluate carbon emission reduction efficiency,and a carbon emission efficiency evaluation for a certain power energy group from 2020 to 2022 was conducted.The results showed that from 2020 to 2021,due to the im-provement of scale efficiency,the carbon emission reduction efficiency of the group showed an upward trend,but the average pure tech-nical efficiency and technological progress both decreased.From 2021 to 2022,due to the unreasonable restructuring and production plan adjustment of the group,the carbon emission reduction efficiency of the group decreased,but the pure technical efficiency and tech-nological progress rate increased.The overall carbon emission reduction efficiency in Central China was on the rise,but attention should still be paid to reducing unnecessary production scale and strengthening the management of carbon management level input factors.The change in carbon emission reduction efficiency in East China was very small(all around 1),and it was necessary to find a breakthrough point in carbon emissions to improve overall productivity.The carbon emission reduction efficiency in North China shifted from increas-ing to decreasing,and it was necessary to pay attention to the reform of enterprise management and production organizational structure.The carbon emission reduction efficiency in the northwest region shifted from increasing to decreasing,requiring attention to enterprise management and the elimination of outdated production capacity.The carbon reduction efficiency in the northeast region shifted from in-creasing to decreasing,and it was necessary to phase out outdated production capacity.
energy enterprisescarbon emission reduction efficiencysuper efficient SBM DEA modelMalmquistinterval type Ⅱ fuzzy numbers
万方数据
维普
