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A high pressure and high frequency diaphragm engine: Comparison of measured results with thermoacoustic predictions

Author

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  • Steiner, Thomas W.
  • Archibald, Geoffrey D.S.

Abstract

A novel diaphragm Stirling/thermoacoustic engine has been developed and tested that operates at high pressure and high frequency thereby delivering good power density and efficiency. This engine does not require any high tolerance or exotic parts and may thus be amenable to low cost construction in volume. Given the high frequency (500Hz) and high working gas pressure (90bar He) the inertia of the working gas is not negligible and thus traditional Stirling engine analysis fails to properly model such an engine. Instead, the engine is successfully modeled as a traveling wave thermoacoustic engine with a mechanical resonator (the displacer) closing the acoustic power loop. The predictions of the thermoacoustic model are compared with experimental results obtained from a prototype engine.

Suggested Citation

  • Steiner, Thomas W. & Archibald, Geoffrey D.S., 2014. "A high pressure and high frequency diaphragm engine: Comparison of measured results with thermoacoustic predictions," Applied Energy, Elsevier, vol. 114(C), pages 709-716.
    • Handle: RePEc:eee:appene:v:114:y:2014:i:c:p:709-716
    DOI: 10.1016/j.apenergy.2013.07.039
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    References listed on IDEAS

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    1. Yu, Zhibin & Jaworski, Artur J. & Backhaus, Scott, 2012. "Travelling-wave thermoacoustic electricity generator using an ultra-compliant alternator for utilization of low-grade thermal energy," Applied Energy, Elsevier, vol. 99(C), pages 135-145.
    2. Yang, Qin & Luo, Ercang & Dai, Wei & Yu, Guoyao, 2012. "Thermoacoustic model of a modified free piston Stirling engine with a thermal buffer tube," Applied Energy, Elsevier, vol. 90(1), pages 266-270.
    3. Sun, D.M. & Wang, K. & Zhang, X.J. & Guo, Y.N. & Xu, Y. & Qiu, L.M., 2013. "A traveling-wave thermoacoustic electric generator with a variable electric R-C load," Applied Energy, Elsevier, vol. 106(C), pages 377-382.
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