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Conceptual Design Development of a Fuel-Reforming System for Fuel Cells in Underwater Vehicles

Author

Listed:
  • Seung-Kyo Jung

    (Naval & Energy System R & D, Daewoo Shipbuilding Marine Engineering, Gyeonggi-do 15011, Korea)

  • Won-Sim Cha

    (Naval & Energy System R & D, Daewoo Shipbuilding Marine Engineering, Gyeonggi-do 15011, Korea)

  • Yeong-In Park

    (Naval & Energy System R & D, Daewoo Shipbuilding Marine Engineering, Gyeonggi-do 15011, Korea)

  • Shin-Hyung Kim

    (Naval & Energy System R & D, Daewoo Shipbuilding Marine Engineering, Gyeonggi-do 15011, Korea)

  • Jungho Choi

    (Department of Naval Architecture and Offshore Engineering, Dong-A University, Busan 49315, Korea)

Abstract

An air-independent propulsion system containing fuel cells is applied to improve the operational performance of underwater vehicles in an underwater environment. Fuel-reforming efficiently stores and supplies hydrogen required to operate fuel cells. In this study, the applicability of a fuel-reforming system using various fuels for underwater vehicles was analyzed by calculating the fuel and water consumptions, the amount of CO 2 generated as a byproduct, and the amount of water required to dissolve the CO 2 using aspen HYSYS (Aspen Technology, Inc., Bedford, MA, USA). In addition, the performance of the fuel-reforming system for methanol, which occupies the smallest volume in the system, was researched by analyzing performance indicators such as methanol conversion rate, hydrogen, yield and selectivity, and reforming efficiency under conditions at which pressure, temperature, steam-to-carbon ratio (SCR), and hydrogen separation efficiency vary. The highest reforming efficiency was 77.7–77.8% at 260 °C and 270 °C. At SCR 1.5, the reforming efficiency was the highest, which is 77.8%, and the CO 2 generation amount was the lowest at 1.46 kmol/h. At high separation efficiency, the reforming efficiency increased due to the reduction of reactants, and a rate at which energy is consumed for endothermic reactions also decreased, resulting in a lower CO 2 generation amount.

Suggested Citation

  • Seung-Kyo Jung & Won-Sim Cha & Yeong-In Park & Shin-Hyung Kim & Jungho Choi, 2020. "Conceptual Design Development of a Fuel-Reforming System for Fuel Cells in Underwater Vehicles," Energies, MDPI, vol. 13(8), pages 1-15, April.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:8:p:2000-:d:347070
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    References listed on IDEAS

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    1. Ghosh, P.C. & Vasudeva, U., 2011. "Analysis of 3000T class submarines equipped with polymer electrolyte fuel cells," Energy, Elsevier, vol. 36(5), pages 3138-3147.
    2. Alejandro Mendez & Teresa J. Leo & Miguel A. Herreros, 2014. "Current State of Technology of Fuel Cell Power Systems for Autonomous Underwater Vehicles," Energies, MDPI, vol. 7(7), pages 1-18, July.
    3. Edward K. Y. Chen, 1983. "The Diffusion of Technology," Palgrave Macmillan Books, in: Multinational Corporations, Technology and Employment, chapter 4, pages 69-93, Palgrave Macmillan.
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    Cited by:

    1. Guoqiang Wang & Feng Wang & Delun Guan, 2022. "A Study of Thermoelectric Generation Coupled with Methanol Steam Reforming for Hydrogen Production," Energies, MDPI, vol. 15(21), pages 1-11, November.

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