Results 111 to 120 of about 850 (142)

SCALING OF THERMOACOUSTIC REFRIGERATORS

AIP Conference Proceedings, 2008
The possibility of scaling-down thermoacoustic refrigerators is theor. investigated. Standing-wave systems are considered as well as traveling-wave. In the former case, a ref. system is taken that consists of a resonator tube (50 cm) with a closed end and a PVC stack (length 5 cm).
Y. Li, J. C. H. Zeegers, H. J. M. ter Brake, J. G. Weisend, John Barclay, Susan Breon, Jonathan Demko, Michael DiPirro, J. Patrick Kelley, Peter Kittel, Arkadiy Klebaner, Al Zeller, Mark Zagarola, Steven Van Sciver, Andrew Rowe, John Pfotenhauer, Tom Peterson, Jennifer Lock   +17 more
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Thermoacoustic refrigeration demonstration

The Journal of the Acoustical Society of America, 1998
A portable device for demonstrating thermoacoustic cooling is developed using off-the-shelf components: the Morel MW-142 5-in. woofer and the Selenium HL14-25 horn. Acoustic peak pressure amplitudes of 19 kPa (19% of mean pressure) have been measured (without stack) using atmospheric air as the working fluid.
Ray Scott Wakeland, Steven L. Garrett
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Thermoacoustic Refrigeration Device

2009 Asia-Pacific Power and Energy Engineering Conference, 2009
A thermoacoustic refrigeration device (TAR) includes an acoustic wave generation device arranged directed to the channel of a hollow tube, and a regenerator provided at a predetermined position in the channel of the tube. A temperature gradient is obtained across the regenerator by an acoustic wave emitted from the acoustic wave generation device ...
E. Qing, Feng Wu, Duanyong Li, Fangzhong Guo   +3 more
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An experimental thermoacoustically driven thermoacoustic refrigerator

The Journal of the Acoustical Society of America, 1996
The construction of a thermoacoustically (heat) driven, thermoacoustic refrigerator (TADTAR) is nearing completion. The design utilizes a novel resonator topology and high-efficiency primary heat exchangers. Numerical models suggest a cooling power level of at least 500 W over a temperature span of 40 °C.
Thomas J. Hofler, Jay A. Adeff, Tom Heatter, Anthony A. Atchley   +3 more
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Prandtl number and thermoacoustic refrigerators

The Journal of the Acoustical Society of America, 2002
From kinetic gas theory, it is known that the Prandtl number for hard-sphere monatomic gases is 2/3. Lower values can be realized using gas mixtures of heavy and light monatomic gases. Prandtl numbers varying between 0.2 and 0.67 are obtained by using gas mixtures of helium–argon, helium–krypton, and helium–xenon.
Tijani, M.E.H., Zeegers, J.C.H., Waele, de, A.T.A.M.   +2 more
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Thermoacoustic–Stirling model refrigerator

The Journal of the Acoustical Society of America, 2001
The design and performance of a model refrigerator that uses a stainless-steel woven regenerator (4.1 cm diameter, 5.0 mm thick) and an unconventional Helmholtz resonator to provide proper phasing for the regenerator are described. Cooling is produced in air at atmospheric pressure with sound pressures in excess of 6 kPa in a transparent 60 cm long ...
Matthew E. Poese, Steven L. Garrett
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Design of thermoacoustic refrigerators

Cryogenics, 2002
in this paper the design of thermoacoustic refrigerators. using the linear thermoacoustic theory, is described. Due to the large number of parameters, a choice of some parameters along with dimensionless independent variables will be introduced. The design strategy described in this paper is a guide for the design and development of thermoacoustic ...
Tijani, M.E.H., Zeegers, J.C.H., Waele, de, A.T.A.M.   +2 more
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Thermoacoustic life sciences refrigerator

The Journal of the Acoustical Society of America, 1993
This thermoacoustic refrigerator is being built to preserve biological samples (blood, urine, etc.) during Space Shuttle operations. It employs two high-power electrodynamic drivers capable of generating 60 W of acoustic power each, two ‘‘stacks,’’ and four internal heat exchangers in order to produce 700 BTU/h (205 W) of cooling in the refrigerator ...
Steven L. Garrett, D. Felipe Gaitan, David K. Perkins, D. Andrew Helseth   +3 more
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Thermoacoustic Refrigerator’s Stack Optimization

AIP Conference Proceedings, 2010
The standing wave thermoacoustic refrigerator, which uses sound generation to transfer heat, was developed rapidly during the past four decades. It was regarded as a new, promising and environmentally benign alternative to conventional compression vapor refrigerators, although it was not competitive regarding the coefficient of performance (COP) yet ...
Mawahib Hassan El-Fawal, Normah Mohd-Ghazali, Mohd. Shafik Yaacob, Amer Nordin Darus, M. A. Wahid, S. Samion, N. A. C. Sidik, J. M. Sheriff   +7 more
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Improvements in an experimental thermoacoustically driven thermoacoustic refrigerator

The Journal of the Acoustical Society of America, 1997
A thermoacoustically (heat) driven, thermoacoustic refrigerator apparatus, having a novel topology, has produced significant cooling power and efficiency. It has achieved a cooling temperature span of 60 °C, and 91 W of cooling power at a span of 25 °C, with an overall COP of 0.15. These numbers were produced with a porous carbon refrigerator stack and
Thomas J. Hofler, Jay A. Adeff
openaire   +1 more source