Thermoacoustic power conversion using a piezoelectric transducer

The Journal of the Acoustical Society of America
Carl Jensen, R Raspet

Abstract

The predicted efficiency of a simple thermoacoustic waste heat power conversion device has been investigated as part of a collaborative effort combining a thermoacoustic engine with a piezoelectric transducer. Symko et al. [Microelectron. J. 35, 185-191 (2004)] at the University of Utah built high frequency demonstration engines for this application, and Lynn [ASMDC report, accession number ADA491030 (2008)] at the University of Washington designed and built a high efficiency piezoelectric unimorph transducer for electroacoustic conversion. The design presented in this paper is put forward to investigate the potential of a simple high frequency, air filled, standing wave thermoacoustic device to be competitive with other small generator technologies such as thermoelectric devices. The thermoacoustic generator is simulated using a low-amplitude approximation for thermoacoustics and the acoustic impedance of the transducer is modeled using an equivalent circuit model calculated from the transducer's mechanical and electrical properties. The calculations demonstrate that a device performance of around 10% of Carnot efficiency could be expected from the design which is competitive with currently available thermoelectric generators.

References

Jul 13, 2004·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Alex V Mezheritsky
Apr 6, 2007·The Journal of the Acoustical Society of America·Heui-Seol RohHenry E Bass
Jul 7, 2007·The Journal of the Acoustical Society of America·Fei LiuMark Sheplak

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Citations

Dec 6, 2011·Journal of Magnetic Resonance·Igor V MastikhinRhys Emms
Sep 4, 2015·The Journal of the Acoustical Society of America·Lin MaLuc Bauwens
Mar 3, 2018·The Journal of the Acoustical Society of America·Michael A G TimmerTheo H van der Meer

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