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A Comparative Study on the Reduction Effect in Greenhouse Gas Emissions between the Combined Heat and Power Plant and Boiler

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  • Dahye Kim

    (School of Environmental Engineering, University of Seoul, Seoul 02504, Korea)

  • Kyung-Tae Kim

    (Department of Business Administration, Kangwon National University, Chuncheon 24341, Korea)

  • Young-Kwon Park

    (School of Environmental Engineering, University of Seoul, Seoul 02504, Korea)

Abstract

The purpose of this study is to compare the effect of a reduction in greenhouse gas (GHG) emissions between the combined heat and power (CHP) plant and boiler, which became the main energy-generating facilities of “anaerobic digestion” (AD) biogas produced in Korea, and analyze the GHG emissions in a life cycle. Full-scale data from two Korean “wastewater treatment plants” (WWTPs), which operated boilers and CHP plants fueled by biogas, were used in order to estimate the reduction potential of GHG emissions based on a “life cycle assessment” (LCA) approach. The GHG emissions of biogas energy facilities were divided into pre-manufacturing stages, production stages, pretreatment stages, and combustion stages, and the GHG emissions by stages were calculated by dividing them into Scope1, Scope2, and Scope3. Based on the calculated reduction intensity, a comparison of GHG reduction effects was made by assuming a scenario in which the amount of biogas produced at domestic sewage treatment plants used for boiler heating is replaced by a CHP plant. Four different scenarios for utilizing biogas are considered based on the GHG emission potential of each utilization plant. The biggest reduction was in the scenario of using all of the biogas in CHP plants and heating the anaerobic digester through district heating. GHG emissions in a life cycle were slightly higher in boilers than in CHP plants because GHG emissions generated by pre-treatment facilities were smaller than other emissions, and lower Scope2 emissions in CHP plants were due to their own use of electricity produced. It was confirmed that the CHP plant using biogas is superior to the boiler in terms of GHG reduction in a life cycle.

Suggested Citation

  • Dahye Kim & Kyung-Tae Kim & Young-Kwon Park, 2020. "A Comparative Study on the Reduction Effect in Greenhouse Gas Emissions between the Combined Heat and Power Plant and Boiler," Sustainability, MDPI, vol. 12(12), pages 1-11, June.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:12:p:5144-:d:375635
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    References listed on IDEAS

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    1. Scarlat, Nicolae & Dallemand, Jean-François & Fahl, Fernando, 2018. "Biogas: Developments and perspectives in Europe," Renewable Energy, Elsevier, vol. 129(PA), pages 457-472.
    2. Rasi, S. & Veijanen, A. & Rintala, J., 2007. "Trace compounds of biogas from different biogas production plants," Energy, Elsevier, vol. 32(8), pages 1375-1380.
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    Cited by:

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    3. Mohammad Hemmati & Mehdi Abapour & Behnam Mohammadi-Ivatloo & Amjad Anvari-Moghaddam, 2020. "Optimal Operation of Integrated Electrical and Natural Gas Networks with a Focus on Distributed Energy Hub Systems," Sustainability, MDPI, vol. 12(20), pages 1-22, October.
    4. Sun, Hui & Wang, Enzhen & Li, Xiang & Cui, Xian & Guo, Jianbin & Dong, Renjie, 2021. "Potential biomethane production from crop residues in China: Contributions to carbon neutrality," Renewable and Sustainable Energy Reviews, Elsevier, vol. 148(C).
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    7. Elnaz Davoodi & Salar Balaei-Sani & Behnam Mohammadi-Ivatloo & Mehdi Abapour, 2021. "Flexible Continuous-Time Modeling for Multi-Objective Day-Ahead Scheduling of CHP Units," Sustainability, MDPI, vol. 13(9), pages 1-18, April.

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