Results 131 to 140 of about 547 (159)
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Thermoacoustic Refrigerator’s Stack Optimization
AIP Conference Proceedings, 2010The 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 +7 more
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Experimental studies on thermoacoustic refrigeration
The Journal of the Acoustical Society of America, 1996Thermoacoustic refrigeration phenomena in a resonance tube were studied experimentally. A horizontal brass tube of 400 mm in length and 40 mm in diameter was closed at one end and attached to the acoustic driver (audio speaker) at the other end. Atmospheric air was enclosed in the tube as a working fluid.
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Thermoacoustic–Stirling model refrigerator
The Journal of the Acoustical Society of America, 2001The 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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Numerical optimization of a novel thermoacoustically driven thermoacoustic refrigerator
The Journal of the Acoustical Society of America, 1997Previous modeling work on a novel heat-driven refrigerator has generated overall COP numbers in the range of 0.45 using pure helium gas. The modeled conditions are for commercial or air-conditioning cooling temperatures, with a hot drive temperature of 400 °C.
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Tabletop thermoacoustic refrigerator for demonstrations
American Journal of Physics, 2002An inexpensive (less than $25) tabletop thermoacoustic refrigerator for demonstration purposes was built from a boxed loudspeaker, acrylic tubing and sheet, a roll of 35 mm film, fishing line, an aluminum plug, and two homemade thermocouples. Temperature differences of more than 15 °C were achieved after running the cooler for several minutes.
Daniel A. Russell, Pontus Weibull
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Streaming in thermoacoustic engines and refrigerators
AIP Conference Proceedings, 2000The efficiency of thermoacoustic engines and refrigerators is now approaching 40% of the ideal efficiency allowed by the laws of thermodynamics. To achieve such high efficiency requires understanding and control of streaming. Sometimes, thermoacoustic phenomena cause unwanted streaming-driven convection of heat, which we strive to eliminate; in other ...
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Parametric Optimization for Thermoacoustic Refrigerator Driven by Thermoacoustic Engine
International Conference on Fluid Flow, Heat and Mass Transfer, 2022Ussama Ali, Md Islam, Isam Janajreh
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Design, manufacturing and testing of a compact thermoacoustic refrigerator
Applied Thermal Engineering, 2021Islam Ramadan +2 more
exaly