Thermoacoustic power conversion using a piezoelectric transducer

被引:35
作者
Jensen, Carl [1 ]
Raspet, Richard
机构
[1] Univ Mississippi, Natl Ctr Phys Acoust, University, MS 38677 USA
关键词
acoustic impedance; acoustoelectric transducers; equivalent circuits; piezoelectric transducers; thermoacoustics; thermoelectric conversion; STACKS; RESONATOR; ENGINES; DESIGN; TUBE;
D O I
10.1121/1.3409370
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
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 [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. (C) 2010 Acoustical Society of America. [DOI: 10.1121/1.3409370]
引用
收藏
页码:98 / 103
页数:6
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