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首页> 外文期刊>Journal of power sources >Performance evaluation of a direct-biogas solid oxide fuel cell-micro gas turbine (SOFC-MGT) hybrid combined heat and power (CHP) system
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Performance evaluation of a direct-biogas solid oxide fuel cell-micro gas turbine (SOFC-MGT) hybrid combined heat and power (CHP) system

机译：直接沼气固体氧化物燃料电池-微型燃气轮机（SOFC-MGT）混合热电联产（CHP）系统的性能评估

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摘要

The combination of a direct-biogas solid oxide fuel cell (SOFC) with a micro gas turbine (MGT) system offers great potential as a green decentralized combined heat and power (CHP) system. To evaluate the potential use of biogas as the main source of energy for a direct-biogas SOFC-MGT hybrid CHP system, a sensitivity analysis was conducted under diverse operating conditions to investigate the influence of key operating parameters of the hybrid CHP system with the consideration of operational constraints. The key parameters in this study were SOFC reforming agent, SOFC fuel utilization factor (U_f), turbine inlet temperature (TIT), and compression ratio. The influence of variation in operating parameters on plant performance was evaluated for the overall system and SOFC efficiencies as well as the heat-to-power ratio (TER), the power ratio of MGT to SOFC (Pmgt/Psofc). and the size of the SOFC stack. As a reforming agent for direct-biogas SOFC, steam is more preferable than a traditional air-steam mixture in terms of material limitations and SOFC efficiencies; however, an air-steam mixture with a small amount of air boosts the useful heat output and electricity generated by an MGT without significantly affecting overall system efficiency. The increase in U_f improves the electrical power output produced by the SOFC stack, but also requires more fuel to be fed to the burner, resulting in an increase in useful heat energy. Increasing the compression ratio improves the system electrical efficiency but lowers useful heat generation; nevertheless, increasing TIT decreases the system electrical efficiency but improves the efficiency of the CHP system. To achieve the optimum operating conditions of the hybrid CHP system, the operating parameters should be determined based on the desired energy outcomes.
机译：直接沼气固体氧化物燃料电池（SOFC）与微型燃气轮机（MGT）系统的组合具有巨大的潜力，可作为绿色的分散式热电联产（CHP）系统。为了评估将沼气作为直接沼气SOFC-MGT混合热电联产系统的主要能源的潜在用途，在不同的运行条件下进行了敏感性分析，以研究混合热电联产系统关键运行参数的影响。操作限制。这项研究的关键参数是SOFC重整剂，SOFC燃料利用率（U_f），涡轮进口温度（TIT）和压缩比。针对整个系统和SOFC效率以及热功率比（TER），MGT与SOFC的功率比（Pmgt / Psofc），评估了运行参数变化对工厂性能的影响。以及SOFC堆栈的大小。作为直接沼气SOFC的重整剂，就材料限制和SOFC效率而言，蒸汽比传统的空气-蒸汽混合物更可取。但是，含有少量空气的空气-蒸汽混合物可提高MGT的有用热量输出和电能，而不会显着影响整个系统的效率。 U_f的增加改善了由SOFC堆产生的电功率输出，但是还需要更多的燃料被供给到燃烧器，导致有用的热能增加。增加压缩比可以提高系统的电效率，但会减少有用的热量。但是，提高TIT会降低系统电气效率，但会提高CHP系统的效率。为了获得混合式热电联产系统的最佳运行条件，应基于所需的能量结果确定运行参数。

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  • 来源
    《Journal of power sources》 |2013年第1期|9-17|共9页
  • 作者

    Suranat Wongchanapai; Hiroshi Iwai; Motohiro Saito; Hideo Yoshida;

  • 作者单位

    Department of Aeronautics and Astronautics, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;

    Department of Aeronautics and Astronautics, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;

    Department of Aeronautics and Astronautics, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;

    Department of Aeronautics and Astronautics, Kyoto University, Yoshida Honmachi, Sakyo-ku, Kyoto 606-8501, Japan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    solid oxide fuel cell; biogas; direct internal reforming; CHP system; exergy analysis;

    机译：固体氧化物燃料电池沼气直接内部改革;CHP系统;火用分析;

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