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An Improved Flexible Solar Thermal Energy Integration Process for Enhancing the Coal-Based Energy Efficiency and NO x Removal Effectiveness in Coal-Fired Power Plants under Different Load Conditions

Author

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  • Yu Han

    (Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China
    Department of Mechanical & Aerospace Engineering, University of Missouri, Columbia, MO 65211, USA)

  • Cheng Xu

    (Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China)

  • Gang Xu

    (Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China)

  • Yuwen Zhang

    (Department of Mechanical & Aerospace Engineering, University of Missouri, Columbia, MO 65211, USA)

  • Yongping Yang

    (Beijing Key Laboratory of Emission Surveillance and Control for Thermal Power Generation, North China Electric Power University, Beijing 102206, China)

Abstract

An improved flexible solar-aided power generation system (SAPG) for enhancing both selective catalytic reduction (SCR) de-NO x efficiency and coal-based energy efficiency of coal-fired power plants is proposed. In the proposed concept, the solar energy injection point is changed for different power plant loads, bringing about different benefits for coal-fired power generation. For partial/low load, solar energy is beneficially used to increase the flue gas temperature to guarantee the SCR de-NO x effectiveness as well as increase the boiler energy input by reheating the combustion air. For high power load, solar energy is used for saving steam bleeds from turbines by heating the feed water. A case study for a typical 1000 MW coal-fired power plant using the proposed concept has been performed and the results showed that, the SCR de-NO x efficiency of proposed SAPG could increase by 3.1% and 7.9% under medium load and low load conditions, respectively, as compared with the reference plant. The standard coal consumption rate of the proposed SAPG could decrease by 2.68 g/kWh, 4.05 g/kWh and 6.31 g/kWh for high, medium and low loads, respectively, with 0.040 USD/kWh of solar generated electricity cost. The proposed concept opens up a novel solar energy integration pattern in coal-fired power plants to improve the pollutant removal effectiveness and decrease the coal consumption of the power plant.

Suggested Citation

  • Yu Han & Cheng Xu & Gang Xu & Yuwen Zhang & Yongping Yang, 2017. "An Improved Flexible Solar Thermal Energy Integration Process for Enhancing the Coal-Based Energy Efficiency and NO x Removal Effectiveness in Coal-Fired Power Plants under Different Load Conditions," Energies, MDPI, vol. 10(10), pages 1-18, September.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1485-:d:113178
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    References listed on IDEAS

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    Cited by:

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    2. Gao, Wei & Liu, Ming & Yin, Junjie & Zhao, Yongliang & Chen, Weixiong & Yan, Junjie, 2023. "An improved control strategy for a denitrification system using cooperative control of NH3 injection and flue gas temperature for coal-fired power plants," Energy, Elsevier, vol. 282(C).
    3. Pulin Cao & Hongchun Shu & Bo Yang & Na An & Dalin Qiu & Weiye Teng & Jun Dong, 2018. "Voltage Distribution–Based Fault Location for Half-Wavelength Transmission Line with Large-Scale Wind Power Integration in China," Energies, MDPI, vol. 11(3), pages 1-22, March.
    4. Young Mun Lee & Heeyoon Chung & Seon Ho Kim & Hyeng Sub Bae & Hyung Hee Cho, 2017. "Optimization of the Heating Element in a Gas-Gas Heater Using an Integrated Analysis Model," Energies, MDPI, vol. 10(12), pages 1-19, November.
    5. Yuanhao Shi & Jie Wen & Fangshu Cui & Jingcheng Wang, 2019. "An Optimization Study on Soot-Blowing of Air Preheaters in Coal-Fired Power Plant Boilers," Energies, MDPI, vol. 12(5), pages 1-15, March.
    6. Han, Yu & Sun, Yingying & Wu, Junjie, 2020. "An efficient solar-aided waste heat recovery system based on steam ejector and WTA pre-drying in solar/lignite hybrid power plants," Energy, Elsevier, vol. 208(C).

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