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Title: Thermoacoustic engines and refrigerators

Abstract

We ordinarily think of a sound wave in a gas as consisting of coupled pressure and displacement oscillations. However, temperature oscillations always accompany the pressure changes. The combination of all these oscillations, and their interaction with solid boundaries, produces a rich variety of `thermoacoustic` effects. Although these effects as they occur in every-day life are too small to be noticed, one can harness extremely loud sound waves in acoustically sealed chambers to produce powerful heat engines, heat pumps and refrigerators. Whereas typical engines and refrigerators have crankshaft-coupled pistons or rotating turbines, thermoacoustic engines and refrigerators have at most a single flexing moving part (as in a loudspeaker) with no sliding seals. Thermoacoustic devices may be of practical use where simplicity, reliability or low cost is more important than the highest efficiency (although one cannot say much more about their cost-competitiveness at this early stage). This paper discusses the fundamentals of thermoacoustic engines and refrigerators, research in this field, and their commercial development. 16 refs., 5 figs.

Authors:
 [1]
  1. Los Alamos National Lab., NM (United States)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
91266
Resource Type:
Journal Article
Journal Name:
Physics Today
Additional Journal Information:
Journal Volume: 48; Journal Issue: 7; Other Information: PBD: Jul 1995
Country of Publication:
United States
Language:
English
Subject:
66 PHYSICS; ACOUSTIC HEATING; PRESSURE DEPENDENCE; ACOUSTICS; USES; HEAT ENGINES; CARNOT CYCLE; REFRIGERATORS

Citation Formats

Swift, G W. Thermoacoustic engines and refrigerators. United States: N. p., 1995. Web. doi:10.1063/1.881466.
Swift, G W. Thermoacoustic engines and refrigerators. United States. https://doi.org/10.1063/1.881466
Swift, G W. 1995. "Thermoacoustic engines and refrigerators". United States. https://doi.org/10.1063/1.881466.
@article{osti_91266,
title = {Thermoacoustic engines and refrigerators},
author = {Swift, G W},
abstractNote = {We ordinarily think of a sound wave in a gas as consisting of coupled pressure and displacement oscillations. However, temperature oscillations always accompany the pressure changes. The combination of all these oscillations, and their interaction with solid boundaries, produces a rich variety of `thermoacoustic` effects. Although these effects as they occur in every-day life are too small to be noticed, one can harness extremely loud sound waves in acoustically sealed chambers to produce powerful heat engines, heat pumps and refrigerators. Whereas typical engines and refrigerators have crankshaft-coupled pistons or rotating turbines, thermoacoustic engines and refrigerators have at most a single flexing moving part (as in a loudspeaker) with no sliding seals. Thermoacoustic devices may be of practical use where simplicity, reliability or low cost is more important than the highest efficiency (although one cannot say much more about their cost-competitiveness at this early stage). This paper discusses the fundamentals of thermoacoustic engines and refrigerators, research in this field, and their commercial development. 16 refs., 5 figs.},
doi = {10.1063/1.881466},
url = {https://www.osti.gov/biblio/91266}, journal = {Physics Today},
number = 7,
volume = 48,
place = {United States},
year = {Sat Jul 01 00:00:00 EDT 1995},
month = {Sat Jul 01 00:00:00 EDT 1995}
}