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CO_2 Emissions Embodied in Interprovincial Electricity Transmissions in China

机译：中国省际电力传输中体现的CO_2排放

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摘要

Existing studies on the evaluation of CO_2 emissions due to electricity consumption in China are inaccurate and incomplete. This study uses a network approach to calculate CO_2 emissions of purchased electricity in Chinese provinces. The CO_2 emission factors of purchased electricity range from 265 g/kWh in Sichuan to 947 g/kWh in Inner Mongolia. We find that emission factors of purchased electricity in many provinces are quite different from the emission factors of electricity generation. This indicates the importance of the network approach in accurately reflecting embodied emissions. We also observe substantial variations of emissions factors of purchased electricity within subnational grids: the provincial emission factors deviate from the corresponding subnational-grid averages from -58% to 44%. This implies that using subnational-grid averages as required by Chinese government agencies can be quite inaccurate for reporting indirect CO_2 emissions of enterprises' purchased electricity. The network approach can improve the accuracy of the quantification of embodied emissions in purchased electricity and emission flows embodied in electricity transmission.
机译：现有的关于用电导致的CO_2排放评估的研究是不准确和不完整的。这项研究使用网络方法来计算中国各省购电的CO_2排放。外购电力的CO_2排放因子范围从四川的265 g / kWh到内蒙古的947 g / kWh。我们发现许多省份的购电排放因子与发电排放因子有很大的不同。这表明网络方法在准确反映具体排放方面的重要性。我们还观察到了地方电网内购电的排放因子的巨大变化：省级排放因子偏离相应的地方电网平均水平，从-58％到44％。这意味着，使用中国政府机构要求的地方电网平均数据来报告企业购电的间接CO_2排放可能非常不准确。网络方法可以提高购买的电力中体现的排放量和电力传输中体现的排放流的量化准确性。

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  • 来源
    《Environmental Science & Technology》 |2017年第18期|10893-10902|共10页
  • 作者

    Shen Qu; Sai Liang; Ming Xu;

  • 作者单位

    School for Environment and Sustainability, University of Michigan, Ann Arbor, Michigan 48109-1041, United States;

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing, 100875, People's Republic of China;

    School for Environment and Sustainability, University of Michigan, Ann Arbor, Michigan 48109-1041, United States,Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor, Michigan 48109-2125, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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