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Energy and Exergy Evaluations of a Combined Heat and Power System with a High Back-Pressure Turbine under Full Operating Conditions

Author

Listed:
  • Shifei Zhao

    (School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China)

  • Weishu Wang

    (School of Electric Power, North China University of Water Resources and Electric Power, Zhengzhou 450045, China)

  • Zhihua Ge

    (National Thermal Power Engineering and Technology Research Centre, North China Electric Power University, Beijing 102206, China)

Abstract

High back-pressure technology is a promising method for the waste heat recovery of exhaust steams in combined heat and power systems. In this research, a 300 MW coal-fired subcritical combined heat and power system was selected as the reference system, and modeled in EBSILON professional. Then, energy-based and exergy-based performances of the high back-pressure system and traditional combined heat and power system were compared under full operating conditions. Moreover, a novel exergy-based evaluation method, which considers the energy level of the heating supply, was proposed and applied to evaluate the two systems. Results show that: In design conditions, both the heating capacity and power output of the high back-pressure system were higher than those of the extraction condensing system, which led to 17.67% and 33.21% increments of the gross thermal efficiency and generation efficiency, respectively. Compared with the extraction condensing system, the exergy efficiencies of the high back-pressure system were 7.04–8.21% higher. According to the novel exergy-based evaluation, the exergy efficiencies for the generation of the high back-pressure system and extraction condensing system were 46.48% and 41.22%, respectively. This paper provides references for the thermodynamic performance evaluation of the combined heat and power system.

Suggested Citation

  • Shifei Zhao & Weishu Wang & Zhihua Ge, 2020. "Energy and Exergy Evaluations of a Combined Heat and Power System with a High Back-Pressure Turbine under Full Operating Conditions," Energies, MDPI, vol. 13(17), pages 1-18, August.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:17:p:4484-:d:406745
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    References listed on IDEAS

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    1. Xue, Yuan & Ge, Zhihua & Yang, Lijun & Du, Xiaoze, 2019. "Peak shaving performance of coal-fired power generating unit integrated with multi-effect distillation seawater desalination," Applied Energy, Elsevier, vol. 250(C), pages 175-184.
    2. Heng Chen & Zhen Qi & Qiao Chen & Yunyun Wu & Gang Xu & Yongping Yang, 2018. "Modified High Back-Pressure Heating System Integrated with Raw Coal Pre-Drying in Combined Heat and Power Unit," Energies, MDPI, vol. 11(9), pages 1-16, September.
    3. Li, Yan & Chang, Shanshan & Fu, Lin & Zhang, Shuyan, 2016. "A technology review on recovering waste heat from the condensers of large turbine units in China," Renewable and Sustainable Energy Reviews, Elsevier, vol. 58(C), pages 287-296.
    4. Lund, Henrik & Østergaard, Poul Alberg & Chang, Miguel & Werner, Sven & Svendsen, Svend & Sorknæs, Peter & Thorsen, Jan Eric & Hvelplund, Frede & Mortensen, Bent Ole Gram & Mathiesen, Brian Vad & Boje, 2018. "The status of 4th generation district heating: Research and results," Energy, Elsevier, vol. 164(C), pages 147-159.
    5. Ommen, Torben & Markussen, Wiebke Brix & Elmegaard, Brian, 2016. "Lowering district heating temperatures – Impact to system performance in current and future Danish energy scenarios," Energy, Elsevier, vol. 94(C), pages 273-291.
    6. Zhihua Ge & Fuxiang Zhang & Shimeng Sun & Jie He & Xiaoze Du, 2018. "Energy Analysis of Cascade Heating with High Back-Pressure Large-Scale Steam Turbine," Energies, MDPI, vol. 11(1), pages 1-15, January.
    7. Wang, Hai-Chao & Jiao, Wen-Ling & Lahdelma, Risto & Zou, Ping-Hua, 2011. "Techno-economic analysis of a coal-fired CHP based combined heating system with gas-fired boilers for peak load compensation," Energy Policy, Elsevier, vol. 39(12), pages 7950-7962.
    8. Lund, Henrik & Werner, Sven & Wiltshire, Robin & Svendsen, Svend & Thorsen, Jan Eric & Hvelplund, Frede & Mathiesen, Brian Vad, 2014. "4th Generation District Heating (4GDH)," Energy, Elsevier, vol. 68(C), pages 1-11.
    9. Zhao, Shifei & Ge, Zhihua & He, Jie & Wang, Chunlan & Yang, Yongping & Li, Peifeng, 2017. "A novel mechanism for exhaust steam waste heat recovery in combined heat and power unit," Applied Energy, Elsevier, vol. 204(C), pages 596-606.
    10. Stepanov, V.S., 1995. "Chemical energies and exergies of fuels," Energy, Elsevier, vol. 20(3), pages 235-242.
    11. Wang, Jiangjiang & Lu, Zherui & Li, Meng & Lior, Noam & Li, Weihua, 2019. "Energy, exergy, exergoeconomic and environmental (4E) analysis of a distributed generation solar-assisted CCHP (combined cooling, heating and power) gas turbine system," Energy, Elsevier, vol. 175(C), pages 1246-1258.
    12. Ma, Liqun & Ge, Zhihua & Zhang, Fuxiang & Wei, Huimin, 2020. "A novel super high back pressure cascade heating scheme with multiple large-scale turbine units," Energy, Elsevier, vol. 201(C).
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    Cited by:

    1. Wang, Congyu & Song, Jiwei, 2023. "Performance assessment of the novel coal-fired combined heat and power plant integrating with flexibility renovations," Energy, Elsevier, vol. 263(PC).

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