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Local entropy generation analysis on passive high-concentration DMFCs (direct methanol fuel cell) with different cell structures

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  • Li, Xianglin
  • Faghri, Amir

Abstract

In this paper, the local entropy generation analysis has been conducted based on a two-dimensional, two-phase, non-isothermal DMFC (direct methanol fuel cell) model, the entropy generation contributed by the chemical reactions, heat transfer, mass diffusion, and viscous dissipation is investigated. Then, the performance of fuel cells with different methanol barrier layers and electrolyte membranes have been studied based on the local entropy generation analysis. Results indicate that the entropy generation during cell operation is mainly caused by the irreversible electrochemical reactions, and that the entropy generated by mass diffusion and viscous dissipation can be considered negligible. The entropy generated by heat transfer is about two magnitudes less than the entropy generated by the electrochemical reactions in the passive DMFCs operating near room temperature. The overall entropy generation rate in a DMFC can be decreased by increasing the thickness of the methanol barrier layer and decreasing the thickness of the electrolyte membrane.

Suggested Citation

  • Li, Xianglin & Faghri, Amir, 2011. "Local entropy generation analysis on passive high-concentration DMFCs (direct methanol fuel cell) with different cell structures," Energy, Elsevier, vol. 36(1), pages 403-414.
    • Handle: RePEc:eee:energy:v:36:y:2011:i:1:p:403-414
    DOI: 10.1016/j.energy.2010.10.024
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    References listed on IDEAS

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    1. Sciacovelli, Adriano & Verda, Vittorio, 2009. "Entropy generation analysis in a monolithic-type solid oxide fuel cell (SOFC)," Energy, Elsevier, vol. 34(7), pages 850-865.
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    Cited by:

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    3. Xue, Yan Qing & Guo, Hang & Shang, Hui Hui & Ye, Fang & Ma, Chong Fang, 2015. "Simulation of mass transfer in a passive direct methanol fuel cell cathode with perforated current collector," Energy, Elsevier, vol. 81(C), pages 501-510.
    4. Deng, Huichao & Zhang, Xuelin & Ma, Zezhong & Chen, Hailong & Sun, Qiu & Zhang, Yufeng & Liu, Xiaowei, 2014. "A micro passive direct methanol fuel cell with high performance via plasma electrolytic oxidation on aluminum-based substrate," Energy, Elsevier, vol. 78(C), pages 149-153.
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    6. Arjmandi, H.R. & Amani, E., 2015. "A numerical investigation of the entropy generation in and thermodynamic optimization of a combustion chamber," Energy, Elsevier, vol. 81(C), pages 706-718.
    7. Alipour Najmi, Ali & Rowshanzamir, Soosan & Parnian, Mohammad Javad, 2016. "Investigation of NaOH concentration effect in injected fuel on the performance of passive direct methanol alkaline fuel cell with modified cation exchange membrane," Energy, Elsevier, vol. 94(C), pages 589-599.
    8. Li, Haowen & Yang, Huachao & Xu, Chenxuan & Yan, Jianhua & Cen, Kefa & Ostrikov, Kostya (Ken) & Bo, Zheng, 2022. "Entropy generation analysis in supercapacitor modules based on a three-dimensional coupled thermal model," Energy, Elsevier, vol. 244(PB).
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    10. Sciacovelli, A. & Verda, V. & Sciubba, E., 2015. "Entropy generation analysis as a design tool—A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 1167-1181.
    11. Yuan, Zhenyu & Fu, Wenting & Zhao, Yang & Li, Zipeng & Zhang, Yufeng & Liu, Xiaowei, 2013. "Investigation of μDMFC (micro direct methanol fuel cell) with self-adaptive flow rate," Energy, Elsevier, vol. 55(C), pages 1152-1158.
    12. Aziz, A. & Khan, W.A., 2011. "Classical and minimum entropy generation analyses for steady state conduction with temperature dependent thermal conductivity and asymmetric thermal boundary conditions: Regular and functionally grade," Energy, Elsevier, vol. 36(10), pages 6195-6207.
    13. Fang, Shuo & Zhang, Yufeng & Zou, Yuezhang & Sang, Shengtian & Liu, Xiaowei, 2017. "Structural design and analysis of a passive DMFC supplied with concentrated methanol solution," Energy, Elsevier, vol. 128(C), pages 50-61.
    14. Yuan, Zhenyu & Zhang, Yufeng & Fu, Wenting & Li, Zipeng & Liu, Xiaowei, 2013. "Investigation of a small-volume direct methanol fuel cell stack for portable applications," Energy, Elsevier, vol. 51(C), pages 462-467.
    15. Mallick, Ranjan K. & Thombre, Shashikant B. & Shrivastava, Naveen K., 2016. "Vapor feed direct methanol fuel cells (DMFCs): A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 56(C), pages 51-74.
    16. Li, Xianglin & Huang, Jing & Faghri, Amir, 2015. "Modeling study of a Li–O2 battery with an active cathode," Energy, Elsevier, vol. 81(C), pages 489-500.
    17. Yuan, Zhenyu & Yang, Jie & Zhang, Yufeng & Zhang, Xiwei, 2015. "The optimization of air-breathing micro direct methanol fuel cell using response surface method," Energy, Elsevier, vol. 80(C), pages 340-349.

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