Results 141 to 150 of about 81,289 (210)

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

A heat-driven thermoacoustic refrigeration system with cascade configuration of the cooler

Applied Thermal Engineering
Jiaxin Chi, Zhanghua Wu, Jianying Hu
exaly   +2 more sources

Numerical investigation on a heat-driven free-piston thermoacoustic-Stirling refrigeration system with a unique configuration for recovering low-to-medium grade waste heat

International Journal of Refrigeration, 2021
Kaiqi Luo, Jianying Hu, Ercang Luo
exaly   +2 more sources

A looped heat-driven thermoacoustic refrigeration system with direct-coupling configuration for room temperature cooling

Science Bulletin, 2018
Huizhi Wang, Limin Zhang, Guoyao Yu, Jianying Hu, Ercang Luo, Ying Ma, Chao Jiang, Xianxian Liu   +7 more
openalex   +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

The impact of stack geometry and mean pressure on cold end temperature of stack in thermoacoustic refrigeration systems

Heat and Mass Transfer, 2018
Channarong Wantha
semanticscholar   +3 more sources

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