Journal of South China University of Technology(Natural Science Edition) ›› 2023, Vol. 51 ›› Issue (6): 97-108.doi: 10.12141/j.issn.1000-565X.220731

Special Issue: 2023年能源、动力与电气工程

• Energy,Power & Electrical Engineering • Previous Articles     Next Articles

Research Progress of Online Carbon Emission Monitoring Technology for Thermal Power Enterprises

YAO Shunchun1,2 ZHI Jiaqi1 FU Jinbei3 LI Zhenghui1 LU Zhimin1,2 ZHUO Junling3   

  1. 1.School of Electric Power Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
    2.Guangdong Province Engineering Research Center of High Efficiency and Low Pollution Energy Conversion,Guangzhou 510640,Guangdong,China
    3.Environmental Engineering Assessment Center,Ministry of Ecology and Environment,Beijing 100012,China
  • Received:2022-11-03 Online:2023-06-25 Published:2023-01-13
  • Contact: 卓俊玲(1973-),女,高级工程师,主要从事生态环境执法研究。 E-mail:zhuojl@acee.org.cn
  • About author:姚顺春(1983-),男,教授,博士生导师,主要从事能源低碳转化过程的智能感知和调控研究。E-mail:epscyao@scut.edu.cn
  • Supported by:
    the National Key Research & Development Program of China(2019YFE0109700)

Abstract:

In 2021, China’s national carbon market was officially opened, and the power generation industry was first included in the national unified carbon emission trading market. In this context, accurate, objective, real-time and credible carbon emission data is an important basis for the efficient operation of the carbon trading market. Carbon accounting method and online monitoring method are two commonly used carbon emission measurement methods in the world. This paper firstly reviewed the advantages and disadvantages of the two methods. The accounting method is a common method in China, and it has the advantages of wide application scope and unified accounting standards. However, there are some problems, such as complex processing process, poor timeliness, and sampling process vulnerable to human factors. On-line monitoring method has been widely concerned because of its advantages of good timeliness, high degree of automation and data not affected by human factors. However, there are still many problems in the application of online monitoring method in China. Firstly, there is no corresponding support system; secondly, the data quality of the online monitoring method cannot be guaranteed, and the comparability with the accounting method is also controversial. The biggest factors affecting the data quality are CO2 concentration monitoring technology and flue gas flow monitoring technology; thirdly, the accuracy of flue gas flow monitoring remains to be studied. Then, the data quality improvement and evaluation method of on-line monitoring method were analyzed and summarized. It is considered that the detection accuracy of CO2 concentration in power plant can reach a good level, while the accuracy of flue gas flow monitoring has not yet reached a unified conclusion. Its monitoring technology and measuring point layout will affect its field application. It is imperative to develop a flue flowmeter with independent intellectual property rights, wide application range and high precision for China’s accurate carbon verification cause. The quality evaluation of online monitoring data can be quantified by uncertainty. Finally, the following suggestions were put forward: first, to set up different carbon emissions online monitoring pilot and select different types and capacity of the unit for the studies. According to the specific conditions of the site, different flowmeters should be installed for comparative analysis to explore more suitable flowmeter types and site measurement point layout. Second, to establish an uncertainty analysis model for online monitoring of carbon emissions, to quantitatively analyze the factors that introduce greater uncertainty, and to improve the data evaluation system. Third, to construct a comprehensive comparison system of carbon emission online monitoring data and verification data. If the online monitoring method and the accounting method coexist in the carbon market, it is necessary to ensure the consistency of different data and the fairness of the carbon market. Fourth, to establish a supporting mechanism for a continuous online monitoring system for carbon emissions as soon as possible, and to establish corresponding national standards to ensure that the report data is based on evidence.

Key words: coal fired power plant, carbon dioxide, gas emission, online system, gas flow

CLC Number: