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Imperfect regeneration analysis of Stirling engine caused by temperature differences in regenerator

机译：蓄热室中温差引起的斯特林发动机再生不良

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摘要

The Stirling engine has drawn much attention as it can utilize sustainable energy such as solar, waste heat, and biomass. Although the Stirling cycle has the same theoretical efficiency as the Carnot cycle, the thermal efficiency of an actual Stirling engine is lower than that of the ideal Carnot cycle owing to their reversibility. Previous finite-time thermodynamic models of Stirling engines are mainly focused on the temperature difference between the working substance and heat reservoirs. However, there is also a temperature difference between the working substance and the regenerator, which has merely been reported in previous literatures. In this study, we analyzed the regenerative processes of the Stirling engine using finite-time thermodynamics. Using an even distribution temperature assumption, the regenerative effectiveness and its limitations were obtained. For an uneven distribution temperature assumption, the regenerator was modeled by dividing it into n sub-regenerators. Two cases, for either constant or varying temperatures of the sub-regenerators, are discussed in detail, and the same regenerative effectiveness was obtained for the limit n - infinity Furthermore, the thermal efficiency and output power were obtained, and the effects of the parameters on the performance of the Stirling engine were investigated.
机译：斯特林发动机由于可以利用太阳能，废热和生物质等可持续能源而备受关注。尽管斯特林循环的理论效率与卡诺循环相同，但由于其可逆性，实际斯特林发动机的热效率低于理想卡诺循环的热效率。斯特林发动机以前的有限时间热力学模型主要集中在工作物质和储热器之间的温差。然而，在工作物质和蓄热器之间也存在温差，这仅在以前的文献中有所报道。在这项研究中，我们使用有限时间热力学分析了斯特林发动机的再生过程。使用均匀分布温度的假设，获得了再生效果及其局限性。对于分布温度不均匀的假设，通过将再生器划分为n个子再生器进行建模。详细讨论了子蓄热器温度恒定或变化的两种情况，对于极限n->无穷大，获得了相同的再生效率。此外，获得了热效率和输出功率，以及研究了斯特林发动机性能的参数。

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  • 来源
    《Energy Conversion & Management》 |2018年第2期|60-69|共10页
  • 作者

    Dai D. D.; Yuan F.; Long R.; Liu Z. C.; Liu W.;

  • 作者单位

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Hubei, Peoples R China;

    Huazhong Univ Sci & Technol, Sch Energy & Power Engn, Wuhan 430074, Hubei, Peoples R China;

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

    Stirling engine; Regenerative processes; Imperfect regeneration; Finite time thermodynamics;

    机译：斯特林发动机;再生过程;不完全再生;有限时间热力学;

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