Results 61 to 70 of about 125 (117)

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 ...
A T A M de Waele
exaly   +3 more sources

Application of thermoacoustic effect to refrigeration

Review of Scientific Instruments, 2003
Thermoacoustic effect, as a subprocess of the photoacoustic effect, can also convert heat to acoustic wave by a thermoacoustic prime mover, and can also pump heat by acoustic wave in a thermoacoustic refrigerator. The present study focuses on a thermoacoustically driven pulse tube refrigerator, utilizing sound from a thermoacoustic prime mover to drive
Zhang S Y, Jin T
exaly   +2 more sources

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
openaire   +2 more sources

Thermoacoustic refrigeration for space applications

Space Programs and Technologies Conference, 1991
A thermoacoustic refrigerator has been designed, tested, and certified by NASA to be flown aboard the space-shuttle get-away-special (GAS) payload program on STS-42 in January 1992. This thermoacoustic heat pump uses acoustic power to pump heat from a low-temperature source to a high-temperature sink. It has only 15 g of moving mass operating at 400 Hz,
Garrett, Steven L., Adeff, Jay A., Hofler, Thomas J.   +2 more
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +1 more source

A Study of Thermoacoustic Refrigerator

SAE Technical Paper Series, 2017
<div class="section abstract"><div class="htmlview paragraph">A diesel engine is advantageous in its high thermal efficiency, however it still wastes about 50% of total input energy to exhaust and cooling losses. A feasibility study of thermoacoustic refrigerator was carried out as one of the means to recuperate waste heat.
Masaaki Nakamura, Koichi Machida, Kiyohiro Shimokawa   +2 more
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source