A thermoacoustic Stirling heat engine

Backhaus, Scott; Swift, G. W.

doi:10.1038/20624

Cited by 543 publications

(290 citation statements)

References 11 publications

Supporting

Mentioning

287

Contrasting

Unclassified

Order By: Relevance

“…Ceperley [4,5] designed a device to test the TW principle, but without higher amplification of acoustic power due to the low acoustic impedance of the working gas, which caused large viscous loosening at high acoustic velocities. Backhaus [6] demonstrated an inexpensive TAE that employed the inherently efficient Stirling cycle, allowing it to achieve a thermal efficiency of 30%, which is comparable to conventional internal combustion engines and piston Stirling engines.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a traveling wave thermoacoustic engine in a looped-tube

Novotný

Hsu

Wang

et al. 2014

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. In the present paper, four configurations of a traveling wave thermoacoustic engine in a looped tube were investigated by means of theoretical calculations and experiments. The effect of natural heat convection on their functionality was observed. Acoustic intensity was measured using a dual two microphone method. The stack was designed with few times higher dimension of channels than thermal penetration depth, due to the stack should not be called regenerator. Pressure distribution in the resonator was measured, and a good agreement with theoretical calculations from DELTAEC has been demonstrated.

show abstract

Section: Introductionmentioning

confidence: 99%

Investigation of a traveling wave thermoacoustic engine in a looped-tube

Novotný

Hsu

Wang

et al. 2014

EPJ Web of Conferences

View full text Add to dashboard Cite

show abstract

“…Many experimental studies [2][3][4][5][6][7] have addressed this issue in oscillatory flow with frequencies below several tens of Hertz, aiming at gaining fundamental knowledge related to the mechanical Stirling engine. In the frequency range of thermoacoustic engines, however, experimental studies remain insufficient because they usually operate at several tens to hundreds of Hertz [1,[8][9][10][11][12][13], even up to 23 kHz [14].…”

Section: Introductionmentioning

confidence: 99%

“…A random stack of mesh screens is used as a regenerator of many Stirling engines, including thermoacoustic Stirling engines [1], because it achieves a high surface-area-to-volume ratio and good thermal contact with the working gas. Wide varieties of mesh numbers and wire diameters allow for flexible choices, but choosing an appropriate mesh screen is often difficult.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Heat Flow Transmitted through a Stacked-Screen Regenerator of Thermoacoustic Engine

Hsu

Biwa

2017

Applied Sciences

View full text Add to dashboard Cite

Abstract:A stacked-screen regenerator is a key component in a thermoacoustic Stirling engine. Therefore, the choice of suitable mesh screens is important in the engine design. To verify the applicability of four empirical equations used in the field of thermoacoustic engines and Stirling engines, this report describes the measurements of heat flow rates transmitted through the stacked screen regenerator inserted in an experimental setup filled with pressurized Argon gas having mean pressure of 0.45 MPa. Results show that the empirical equations reproduce the measured heat flow rates to a mutually similar degree, although their derivation processes differ. Additionally, results suggest that two effective pore radii would be necessary to account for the viscous and thermal behaviors of the gas oscillating in the stacked-screen regenerators.

show abstract

“…In the travelingwave thermoacoustic engine usually has a loop configuration, which may cause an acoustic streaming named as Gedeon streaming [6]. Acoustic streaming can have a large impact on the performance of thermoacoustic prime movers and refrigerators as the generated mean flow can lead to undesirable mean convective heat transport [7,8]. There are many experimental and theoretical studies to better understand and to suppress acoustic streaming [8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%