Results 121 to 130 of about 1,121 (166)
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Design of thermoacoustic refrigerators
Cryogenics, 2002in 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. +2 more
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Thermoacoustic life sciences refrigerator
The Journal of the Acoustical Society of America, 1993This 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 +3 more
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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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Improvements in an experimental thermoacoustically driven thermoacoustic refrigerator
The Journal of the Acoustical Society of America, 1997A 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
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Thermoacoustically driven refrigerator with double thermoacoustic-Stirling cycles
Applied Physics Letters, 2006Recently, considerable research efforts have been made to search substitution technologies for chlorofluorocarbon-based vapor compression cycles due to the concern over environmental issues. This letter introduces a helium-based thermoacoustic refrigeration system, which is a thermoacoustic-Stirling refrigerator driven by a thermoacoustic-Stirling heat
Ercang Luo +3 more
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Torsionally resonant toroidal thermoacoustic refrigerator
The Journal of the Acoustical Society of America, 1996Current thermoacoustic refrigerator designs, based on linear actuation style moving-coil electrodynamic transducers (loudspeakers), are limited by their power-handling capacity. Loudspeakers introduce additional design constraints by the fact that they are required to simultaneously serve three separate functions: they must provide the electromotive ...
Joseph W. Osborne, Steven Garrett
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Thermoacoustic engines and refrigerators
AIP Conference Proceedings, 2012Thermoacoustic engines and refrigerators use gas inertia and compressibility to eliminate many of the mechanical contrivances required by traditional engines and refrigerators while providing potentially attractive options that might reduce environmental impacts.
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Thermoacoustic refrigerator for space applications
The Journal of the Acoustical Society of America, 1989Long-lived, space-based cryocoolers with low vibration levels are necessary in a variety of applications, including the cooling of infrared sensors and high Tc superconductors. A thermoacoustic refrigerator designed to function autonomously in a Space Shuttle Get Away Special (GAS) canister will be described that has no sliding seals and oldy 15 gm of ...
S. L. Garrett +8 more
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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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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 +2 more
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