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Indicated diagrams of low temperature differential Stirling engines with channel-shaped heat exchangers

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  • Kato, Yoshitaka

Abstract

The low temperature differential Stirling engine with channel-shaped heat exchangers and regenerators achieved approximately 5 times the indicated power per a stroke volume of displacer of the cases using flat-shaped heat exchangers. The ratio of the maximum fluctuation of ensemble averaged working fluid temperatures, which is the ratio of the internal energy fluctuation to the heat capacity of the working fluid, to the temperature difference between the two heat exchangers in cases using flat-shaped heat exchangers was 0.08–0.09, that in cases using channel-shaped heat exchangers was 0.10–0.17, and that in case using channel-shaped heat exchangers and regenerators was 0.21. The improvement in the experiments is lower than the estimation by the CFD. In terms of the polytropic index, low temperature differential Stirling engines with channel-shaped heat exchangers and regenerators obtained a higher value than low temperature differential Stirling engines with flat-shaped heat exchangers before the displacer reached the dead center.

Suggested Citation

  • 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.
    • Handle: RePEc:eee:renene:v:103:y:2017:i:c:p:30-37
    DOI: 10.1016/j.renene.2016.11.026
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    References listed on IDEAS

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    1. 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.
    2. 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.
    3. Cheng, Chin-Hsiang & Yang, Hang-Suin, 2012. "Optimization of geometrical parameters for Stirling engines based on theoretical analysis," Applied Energy, Elsevier, vol. 92(C), pages 395-405.
    4. Tavakolpour, Ali Reza & Zomorodian, Ali & Akbar Golneshan, Ali, 2008. "Simulation, construction and testing of a two-cylinder solar Stirling engine powered by a flat-plate solar collector without regenerator," Renewable Energy, Elsevier, vol. 33(1), pages 77-87.
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    2. Shulin Wang & Baiao Liu & Gang Xiao & Mingjiang Ni, 2021. "A Potential Method to Predict Performance of Positive Stirling Cycles Based on Reverse Ones," Energies, MDPI, vol. 14(21), pages 1-25, October.

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