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Indicated diagrams of a low temperature differential Stirling engine using flat plates as heat exchangers

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  • Kato, Yoshitaka

Abstract

Indicated diagrams of a low temperature differential (LTD) Stirling engine (SE) were obtained. The evaluation of LTDSE performance was carried out using the results. The heat source temperatures were 75, 80, 85, 90 and 95° Celsius. The working fluid was air with a mean pressure of atmospheric pressure. The shape of the heat exchangers was flat. The stroke volume of the power piston was 3.9 cc, and the stroke volume of the displacer was 238 cc. The LTDSE did not have any regenerators. The maximum indicated power was 3.34 mW. The polytropic exponents becomes larger than 1.4 before the displacer reached dead center, and the working fluid temperatures fluctuated. These behaviors suggest that the heat exchanger did not work effectively. The evaluation of LTDSE performance was carried out using “the maximum fluctuation of ensemble averaged working fluid temperature”. The value is the fluctuation of the internal energy per the heat capacity, and has dimensions of temperature. The obtained values were from 3.2 to 4.7 °C. The comparison of these values with actual temperature differences suggests that the indicated work of conventional LTDSE was much lower than the thermodynamic upper limit.

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  • Kato, Yoshitaka, 2016. "Indicated diagrams of a low temperature differential Stirling engine using flat plates as heat exchangers," Renewable Energy, Elsevier, vol. 85(C), pages 973-980.
    • Handle: RePEc:eee:renene:v:85:y:2016:i:c:p:973-980
    DOI: 10.1016/j.renene.2015.07.053
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    References listed on IDEAS

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    1. Kongtragool, Bancha & Wongwises, Somchai, 2007. "Performance of low-temperature differential Stirling engines," Renewable Energy, Elsevier, vol. 32(4), pages 547-566.
    2. Kongtragool, Bancha & Wongwises, Somchai, 2003. "A review of solar-powered Stirling engines and low temperature differential Stirling engines," Renewable and Sustainable Energy Reviews, Elsevier, vol. 7(2), pages 131-154, April.
    3. Karabulut, Halit & Yücesu, Hüseyin Serdar & ÇInar, Can & Aksoy, Fatih, 2009. "An experimental study on the development of a [beta]-type Stirling engine for low and moderate temperature heat sources," Applied Energy, Elsevier, vol. 86(1), pages 68-73, January.
    4. Kongtragool, Bancha & Wongwises, Somchai, 2005. "Investigation on power output of the gamma-configuration low temperature differential Stirling engines," Renewable Energy, Elsevier, vol. 30(3), pages 465-476.
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    Cited by:

    1. Chen, Wen-Lih & Chen, Chao-Kuang & Fang, Mao-Ju & Yang, Yu-Ching, 2018. "A numerical study on applying slot-grooved displacer cylinder to a γ-type medium-temperature-differential stirling engine," Energy, Elsevier, vol. 144(C), pages 679-693.
    2. Ust, Yasin & Arslan, Feyyaz & Ozsari, Ibrahim, 2017. "A comparative thermo-ecological performance analysis of generalized irreversible solar-driven heat engines," Renewable Energy, Elsevier, vol. 113(C), pages 1242-1249.
    3. Kato, Yoshitaka, 2017. "Indicated diagrams of low temperature differential Stirling engines with channel-shaped heat exchangers," Renewable Energy, Elsevier, vol. 103(C), pages 30-37.
    4. Moazami Goudarzi, Hosein & Yarahmadi, Mehran & Shafii, Mohammad Behshad, 2017. "Design and construction of a two-phase fluid piston engine based on the structure of fluidyne," Energy, Elsevier, vol. 127(C), pages 660-670.
    5. Li, Ruijie & Grosu, Lavinia & Li, Wei, 2017. "New polytropic model to predict the performance of beta and gamma type Stirling engine," Energy, Elsevier, vol. 128(C), pages 62-76.

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