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Entropy generation analysis of heat and water recovery from flue gas by transport membrane condenser

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  • Xiao, Liehui
  • Yang, Minlin
  • Zhao, Shuaifei
  • Yuan, Wu-Zhi
  • Huang, Si-Min

Abstract

The transport membrane condenser (TMC) has been used for heat and water recovery from coal-fired power plant flue gas. The capillary condensation of water vapor in membrane pore structure is the main gas separation mode. A lumped parameter model was established to study the heat and mass transfer in TMC. Recovered water and heat flow rates, water recovery ratio, heat recovery efficiency, and pressure drops were calculated. The temperature and humidity ratio distributions were displayed. The influences of structural parameters and operating conditions on the water and heat recovery performances were analyzed. In addition, the entropy generation model was proposed to calculate entropy variations and entropy generation components. The aim is to provide insights into TMC parameter selection and operation optimization. Moreover, the relationship between entropy generation components and TMC performances were confirmed. The results show that increasing packing fraction, or decreasing the membrane inner diameter or membrane pore size can improve the heat and water recovery performances. Besides, high water flow rates and low water temperatures have advantages in the operation. Increasing the mass/heat transfer driving force can enhance heat transfer performance, but the heat transfer entropy generation rate also increases. The maximum mass transfer entropy generation rate often corresponds to the best water recovery performance.

Suggested Citation

  • Xiao, Liehui & Yang, Minlin & Zhao, Shuaifei & Yuan, Wu-Zhi & Huang, Si-Min, 2019. "Entropy generation analysis of heat and water recovery from flue gas by transport membrane condenser," Energy, Elsevier, vol. 174(C), pages 835-847.
    • Handle: RePEc:eee:energy:v:174:y:2019:i:c:p:835-847
    DOI: 10.1016/j.energy.2019.03.015
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    References listed on IDEAS

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    1. Wang, Dexin & Bao, Ainan & Kunc, Walter & Liss, William, 2012. "Coal power plant flue gas waste heat and water recovery," Applied Energy, Elsevier, vol. 91(1), pages 341-348.
    2. Laskowski, Rafał & Smyk, Adam & Lewandowski, Janusz & Rusowicz, Artur & Grzebielec, Andrzej, 2016. "Selecting the cooling water mass flow rate for a power plant under variable load with entropy generation rate minimization," Energy, Elsevier, vol. 107(C), pages 725-733.
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    Cited by:

    1. Liao, Weicheng & Zhang, Xiaoyue & Li, Zhen, 2022. "Experimental investigation on the performance of a boiler system with flue gas dehumidification and combustion air humidification," Applied Energy, Elsevier, vol. 323(C).
    2. Cui, Qiufang & Tu, Te & Ji, Long & Yan, Shuiping, 2021. "CO2 capture cost saving through waste heat recovery using transport membrane condenser in different solvent-based carbon capture processes," Energy, Elsevier, vol. 216(C).
    3. Liang, Cai-Hang & Li, Nan-Feng & Huang, Si-Min, 2020. "Entropy and exergy analysis of an internally-cooled membrane liquid desiccant dehumidifier," Energy, Elsevier, vol. 192(C).
    4. Li, Zhaohao & Mi, Dabin & Zhang, Heng & Chen, Haiping & Liu, Zhenghao & Gao, Dan, 2021. "Experimental study on synergistic capture of fine particles and waste heat from flue gas using membrane condenser," Energy, Elsevier, vol. 217(C).
    5. Albdoor, Ahmed K. & Ma, Zhenjun & Cooper, Paul & Ren, Haoshan & Al-Ghazzawi, Fatimah, 2020. "Thermodynamic analysis and design optimisation of a cross flow air to air membrane enthalpy exchanger," Energy, Elsevier, vol. 202(C).
    6. Aliabadi, Mohammad Ali Faghih & Lakzian, Esmail & Khazaei, Iman & Jahangiri, Ali, 2020. "A comprehensive investigation of finding the best location for hot steam injection into the wet steam turbine blade cascade," Energy, Elsevier, vol. 190(C).

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