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Efficiency analyses of ethanol-fueled solid oxide fuel cell power system

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  • Hong, Wen-Tang
  • Yen, Tzu-Hsiang
  • Chung, Tsang-Dong
  • Huang, Cheng-Nan
  • Chen, Bao-Dong

Abstract

In this study, the balance of plant (BOP) of an ethanol-fueled SOFC is analyzed using the GCTool software package developed by Argonne National Laboratory (ANL). The effects of the excess air ratio and fuel utilization on the electric and heat efficiencies of the SOFC are systematically examined for two reforming methods (steam reforming and auto-thermal reforming) and two flow sheets (BOP A and BOP B). In BOP A, the cathode off-gas is passed directly to the afterburner together with the unreacted fuel, and the hot flue gas exiting the burner is then used to provide the thermal energy required for the ethanol reforming process. In BOP B, the cathode off-gas is passed through a heat exchanger in order to heat the ethanol fuel prior to the reforming process, and is then flowed into the burner with the unreacted fuel. The results show that given an SOFC inlet temperature of 650°C, a fuel utilization of 70.2% and excess air ratios of 4, 6 and 7, respectively, the overall system efficiency is equal to 74.9%, 72.3% and 71.0%. In general, the results presented in this study provide a useful starting point for the design and development of practical ethanol-fueled SOFC test systems.

Suggested Citation

  • Hong, Wen-Tang & Yen, Tzu-Hsiang & Chung, Tsang-Dong & Huang, Cheng-Nan & Chen, Bao-Dong, 2011. "Efficiency analyses of ethanol-fueled solid oxide fuel cell power system," Applied Energy, Elsevier, vol. 88(11), pages 3990-3998.
    • Handle: RePEc:eee:appene:v:88:y:2011:i:11:p:3990-3998
    DOI: 10.1016/j.apenergy.2011.03.044
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    References listed on IDEAS

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    1. Strazza, C. & Del Borghi, A. & Costamagna, P. & Traverso, A. & Santin, M., 2010. "Comparative LCA of methanol-fuelled SOFCs as auxiliary power systems on-board ships," Applied Energy, Elsevier, vol. 87(5), pages 1670-1678, May.
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    1. Jaggi, Vikas & Jayanti, S., 2013. "A conceptual model of a high-efficiency, stand-alone power unit based on a fuel cell stack with an integrated auto-thermal ethanol reformer," Applied Energy, Elsevier, vol. 110(C), pages 295-303.
    2. Zuliani, Nicola & Taccani, Rodolfo, 2012. "Microcogeneration system based on HTPEM fuel cell fueled with natural gas: Performance analysis," Applied Energy, Elsevier, vol. 97(C), pages 802-808.
    3. Qu, Jifa & Wang, Wei & Chen, Yubo & Deng, Xiang & Shao, Zongping, 2016. "Stable direct-methane solid oxide fuel cells with calcium-oxide-modified nickel-based anodes operating at reduced temperatures," Applied Energy, Elsevier, vol. 164(C), pages 563-571.
    4. Ortiz-Vitoriano, N. & Bernuy-López, C. & Ruiz de Larramendi, I. & Knibbe, R. & Thydén, K. & Hauch, A. & Holtappels, P. & Rojo, T., 2013. "Optimizing solid oxide fuel cell cathode processing route for intermediate temperature operation," Applied Energy, Elsevier, vol. 104(C), pages 984-991.
    5. Qu, Jifa & Wang, Wei & Chen, Yubo & Wang, Feng & Ran, Ran & Shao, Zongping, 2015. "Ethylene glycol as a new sustainable fuel for solid oxide fuel cells with conventional nickel-based anodes," Applied Energy, Elsevier, vol. 148(C), pages 1-9.
    6. Hu, Boxun & Keane, Michael & Patil, Kailash & Mahapatra, Manoj K. & Pasaogullari, Ugur & Singh, Prabhakar, 2014. "Direct methanol utilization in intermediate temperature liquid-tin anode solid oxide fuel cells," Applied Energy, Elsevier, vol. 134(C), pages 342-348.
    7. Komatsu, Y. & Brus, G. & Kimijima, S. & Szmyd, J.S., 2014. "The effect of overpotentials on the transient response of the 300W SOFC cell stack voltage," Applied Energy, Elsevier, vol. 115(C), pages 352-359.
    8. Yonghui Li & Qiuwei Wu & Haiyu Zhu, 2015. "Hierarchical Load Tracking Control of a Grid-Connected Solid Oxide Fuel Cell for Maximum Electrical Efficiency Operation," Energies, MDPI, vol. 8(3), pages 1-21, March.
    9. Yan, Min & Zeng, Min & Chen, Qiuyang & Wang, Qiuwang, 2012. "Numerical study on carbon deposition of SOFC with unsteady state variation of porosity," Applied Energy, Elsevier, vol. 97(C), pages 754-762.
    10. Sariboğa, Vedat & Öksüzömer, Faruk, 2012. "The investigation of active Ni/YSZ interlayer for Cu-based direct-methane solid oxide fuel cells," Applied Energy, Elsevier, vol. 93(C), pages 707-721.
    11. Prabu, V. & Jayanti, S., 2012. "Underground coal-air gasification based solid oxide fuel cell system," Applied Energy, Elsevier, vol. 94(C), pages 406-414.

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