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Sensitivity Analysis of High-Pressure Methanol—Steam Reformer Using the Condensation Enthalpy of Water Vapor

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Listed:
  • Dongjin Yu

    (Department of Mechanical Engineering, Graduate School, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea)

  • Byoungjae Kim

    (School of Mechanical Engineering, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea)

  • Hyunjin Ji

    (Agency for Defense Development, Yuseong-gu, P.O. Box 35-44, Daejeon 34186, Korea)

  • Sangseok Yu

    (School of Mechanical Engineering, Chungnam National University, 99 Daehangno, Yuseong-gu, Daejeon 34134, Korea)

Abstract

A methanol–steam reformer (MSR) can safely provide hydrogen-rich fuel for a fuel cell system. Since the operating temperature of an MSR is relatively low, convective heat transfer is typically used to provide thermal energy to the endothermic reactions in the MSR. In this study, the use of phase change heat transfer to provide thermal energy to the endothermic reactions was investigated, which enhanced the temperature uniformity longitudinally along the MSR. ANSYS Fluent ® software was used to investigate the performance of the reforming reactions. A comparative analysis using sensible heat and latent heat as the heat supply sources was performed. Using latent heat as a heat source achieved a lesser temperature drop than sensible heat that was under 5.29 K in the outer pipe. Moreover, a sensitivity analysis of methanol–steam-reforming reactions that use phase change heat transfer in terms of the carbon ratio, gas hourly velocity (for the inner and outer pipes of the MSR), inlet temperature (inner and outer pipes), reactor length, and operating pressure (inner pipe) was performed. When the phase change energy of water vapor is used, the wall temperature of the MSR is conveniently controlled and is uniformly distributed along the channel (standard deviation: 0.81 K). Accordingly, the methanol conversion rate of an MSR that uses phase change energy is ~4% higher than that of an MSR that employs convective heat transfer.

Suggested Citation

  • Dongjin Yu & Byoungjae Kim & Hyunjin Ji & Sangseok Yu, 2022. "Sensitivity Analysis of High-Pressure Methanol—Steam Reformer Using the Condensation Enthalpy of Water Vapor," Energies, MDPI, vol. 15(10), pages 1-18, May.
  • Handle: RePEc:gam:jeners:v:15:y:2022:i:10:p:3832-:d:821939
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    References listed on IDEAS

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    1. Hyemin Song & Younghyeon Kim & Dongjin Yu & Byoung Jae Kim & Hyunjin Ji & Sangseok Yu, 2020. "A Computational Analysis of a Methanol Steam Reformer Using Phase Change Heat Transfer," Energies, MDPI, vol. 13(17), pages 1-14, August.
    2. Ribeirinha, P. & Abdollahzadeh, M. & Boaventura, M. & Mendes, A., 2017. "H2 production with low carbon content via MSR in packed bed membrane reactors for high-temperature polymeric electrolyte membrane fuel cell," Applied Energy, Elsevier, vol. 188(C), pages 409-419.
    3. Andrea Saltelli, 2002. "Sensitivity Analysis for Importance Assessment," Risk Analysis, John Wiley & Sons, vol. 22(3), pages 579-590, June.
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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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