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A novel solar energy integrated low-rank coal fired power generation using coal pre-drying and an absorption heat pump

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  • Xu, Cheng
  • Bai, Pu
  • Xin, Tuantuan
  • Hu, Yue
  • Xu, Gang
  • Yang, Yongping

Abstract

A novel solar energy integrated low-rank coal (LRC) fired power generation using coal pre-drying and an absorption heat pump (AHP) was proposed. The proposed integrated system efficiently utilizes the solar energy collected from the parabolic trough to drive the AHP to absorb the low-grade waste heat of the steam cycle, achieving larger amount of heat with suitable temperature for coal’s moisture removal prior to the furnace. Through employing the proposed system, the solar energy could be partially converted into the high-grade coal’s heating value and the cold-end losses of the boiler and the steam cycle could be reduced simultaneously, leading to a high-efficient solar energy conversion together with a preferable overall thermal efficiency of the power generation. The results of the detailed thermodynamic and economic analyses showed that, using the proposed integrated concept in a typical 600MW LRC-fired power plant could reduce the raw coal consumption by 4.6kg/s with overall energy and exergy efficiencies improvement of 1.2 and 1.8 percentage points, respectively, as 73.0 MWth solar thermal energy was introduced. The cost of the solar generated electric power could be as low as $0.044/kWh. This work provides an improved concept to further advance the solar energy conversion and utilisation in solar-hybrid coal-fired power generation.

Suggested Citation

  • Xu, Cheng & Bai, Pu & Xin, Tuantuan & Hu, Yue & Xu, Gang & Yang, Yongping, 2017. "A novel solar energy integrated low-rank coal fired power generation using coal pre-drying and an absorption heat pump," Applied Energy, Elsevier, vol. 200(C), pages 170-179.
    • Handle: RePEc:eee:appene:v:200:y:2017:i:c:p:170-179
    DOI: 10.1016/j.apenergy.2017.05.078
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    Cited by:

    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. Chen, Zhidong & Hou, Yichen & Liu, Mingyu & Zhang, Guoqiang & Zhang, Kai & Zhang, Dongke & Yang, Lijun & Kong, Yanqiang & Du, Xiaoze, 2022. "Thermodynamic and economic analyses of sewage sludge resource utilization systems integrating Drying, Incineration, and power generation processes," Applied Energy, Elsevier, vol. 327(C).
    3. Xu, Cheng & Zhang, Qiang & Yang, Zhiping & Li, Xiaosa & Xu, Gang & Yang, Yongping, 2018. "An improved supercritical coal-fired power generation system incorporating a supplementary supercritical CO2 cycle," Applied Energy, Elsevier, vol. 231(C), pages 1319-1329.
    4. Bai, Zhang & Gu, Yucheng & Wang, Shuoshuo & Jiang, Tieliu & Kong, Debin & Li, Qi, 2023. "Applying the solar solid particles as heat carrier to enhance the solar-driven biomass gasification with dynamic operation power generation performance analysis," Applied Energy, Elsevier, vol. 351(C).
    5. Mouaky, Ammar & Rachek, Adil, 2020. "Thermodynamic and thermo-economic assessment of a hybrid solar/biomass polygeneration system under the semi-arid climate conditions," Renewable Energy, Elsevier, vol. 156(C), pages 14-30.
    6. Wu, Ying & Dai, Ying & Xie, Weiyi & Chen, Haijun & Zhu, Yuezhao, 2022. "Performance analysis for post-combustion CO2 capture in coal-fired power plants by integration with solar energy," Energy, Elsevier, vol. 261(PA).
    7. Mouaky, Ammar & Rachek, Adil, 2020. "Energetic, exergetic and exergeoeconomic assessment of a hybrid solar/biomass poylgeneration system: A case study of a rural community in a semi-arid climate," Renewable Energy, Elsevier, vol. 158(C), pages 280-296.
    8. 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.
    9. 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).
    10. Leidong Yuan & Cheng Xu, 2019. "Life Cycle Assessment of Low-Rank Coal Utilization for Power Generation and Energy Transportation," Energies, MDPI, vol. 12(12), pages 1-23, June.
    11. Li, Mengjie & Liu, Ming & Xu, Can & Wang, Jinshi & Yan, Junjie, 2023. "Thermodynamic and sensitivity analyses on drying subprocesses of various evaporative dryers: A comparative study," Energy, Elsevier, vol. 284(C).
    12. Xu, Cheng & Xin, Tuantuan & Xu, Gang & Li, Xiaosa & Liu, Wenyi & Yang, Yongping, 2017. "Thermodynamic analysis of a novel solar-hybrid system for low-rank coal upgrading and power generation," Energy, Elsevier, vol. 141(C), pages 1737-1749.
    13. Liu, Rongtang & Liu, Ming & Zhao, Yongliang & Ma, Yuegeng & Yan, Junjie, 2021. "Thermodynamic study of a novel lignite poly-generation system driven by solar energy," Energy, Elsevier, vol. 214(C).
    14. Wu, Ying & Chen, Xiaoping & Ma, Jiliang & Wu, Ye & Liu, Daoyin & Xie, Weiyi, 2020. "System integration optimization for coal-fired power plant with CO2 capture by Na2CO3 dry sorbents," Energy, Elsevier, vol. 211(C).
    15. Chen, Heng & Wu, Yunyun & Qi, Zhen & Chen, Qiao & Xu, Gang & Yang, Yongping & Liu, Wenyi, 2019. "Improved combustion air preheating design using multiple heat sources incorporating bypass flue in large-scale coal-fired power unit," Energy, Elsevier, vol. 169(C), pages 527-541.
    16. Xu, Cheng & Li, Xiaosa & Xin, Tuantuan & Liu, Xin & Xu, Gang & Wang, Min & Yang, Yongping, 2019. "A thermodynamic analysis and economic assessment of a modified de-carbonization coal-fired power plant incorporating a supercritical CO2 power cycle and an absorption heat transformer," Energy, Elsevier, vol. 179(C), pages 30-45.
    17. 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.
    18. Zhang, Nan & Zhang, Jianliang & Wang, Guangwei & Ning, Xiaojun & Meng, Fanyi & Li, Chuanhui & Ye, Lian & Wang, Chuan, 2022. "Physicochemical characteristics of three-phase products of low-rank coal by hydrothermal carbonization: experimental research and quantum chemical calculation," Energy, Elsevier, vol. 261(PB).
    19. Bai, Zhang & Liu, Qibin & Gong, Liang & Lei, Jing, 2019. "Application of a mid-/low-temperature solar thermochemical technology in the distributed energy system with cooling, heating and power production," Applied Energy, Elsevier, vol. 253(C), pages 1-1.
    20. Sachdeva, Jatin & Singh, Onkar, 2019. "Thermodynamic analysis of solar powered triple combined Brayton, Rankine and organic Rankine cycle for carbon free power," Renewable Energy, Elsevier, vol. 139(C), pages 765-780.
    21. Bai, Zhang & Liu, Qibin & Gong, Liang & Lei, Jing, 2019. "Investigation of a solar-biomass gasification system with the production of methanol and electricity: Thermodynamic, economic and off-design operation," Applied Energy, Elsevier, vol. 243(C), pages 91-101.
    22. Cheng Xu & Yachi Gao & Qiang Zhang & Guoqiang Zhang & Gang Xu, 2018. "Thermodynamic, Economic and Environmental Evaluation of an Improved Ventilation Air Methane-Based Hot Air Power Cycle Integrated with a De-Carbonization Oxy-Coal Combustion Power Plant," Energies, MDPI, vol. 11(6), pages 1-17, June.
    23. Yang Liu & Han Yue & Na Wang & Heng Zhang & Haiping Chen, 2020. "Design and Transient Analysis of a Natural Gas-Assisted Solar LCPV/T Trigeneration System," Energies, MDPI, vol. 13(22), pages 1-24, November.
    24. Liu, Yinhe & Li, Qinlun & Duan, Xiaoli & Zhang, Yun & Yang, Zhen & Che, Defu, 2018. "Thermodynamic analysis of a modified system for a 1000 MW single reheat ultra-supercritical thermal power plant," Energy, Elsevier, vol. 145(C), pages 25-37.

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