Results 121 to 130 of about 215 (180)
A trio of simple optimized axisymmetric kinematic dynamos in a sphere. [PDF]
Proc Math Phys Eng Sci, 2019 Holdenried-Chernoff D +2 more
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Occupational exposure to electromagnetic fields from medical sources. [PDF]
Ind Health, 2018 Stam R, Yamaguchi-Sekino S.
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Thermoacoustically driven triboelectric nanogenerator: Combining thermoacoustics and nanoscience
Applied Physics Letters, 2017A thermoacoustic heat engine (TAHE) is a type of regenerative heat engine that converts external heat into mechanical power in the form of an acoustic wave with no moving mechanical components. One significant application of the TAHE is the generation of electricity by coupling an acoustic-to-electric conversion unit such as a linear motor or a ...
Ercang Luo, Junyi Zhai, Guoyao Yu
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An experimental thermoacoustically driven thermoacoustic refrigerator
The Journal of the Acoustical Society of America, 1996The 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 +3 more
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A cascade thermoacoustic engine
The Journal of the Acoustical Society of America, 2003A cascade thermoacoustic engine is described, consisting of one standing-wave stage plus two traveling-wave stages in series. Most of the acoustic power is produced in the efficient traveling-wave stages. The straight-line series configuration is easy to build and allows no Gedeon streaming.
Gardner, David Lee, Swift, Gregory
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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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SCALING OF THERMOACOUSTIC REFRIGERATORS
AIP Conference Proceedings, 2008The 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 +17 more
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Design and construction of a solar-powdered, thermoacoustically driven, thermoacoustic refrigerator
The Journal of the Acoustical Society of America, 2000A thermoacoustically driven thermoacoustic refrigerator powered by solar thermal energy has been successfully built and tested. A 0.457 m diameter Fresnel lens focuses sunlight onto the hot end of a 0.0254 m diameter reticulated vitreous carbon prime mover stack, heating it to 475 °C, thereby eliminating the need for the most troublesome component in a
Adeff, Jay A., Hofler, Thomas J.
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Thermoacoustic refrigeration for space applications
Space Programs and Technologies Conference, 1991A 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. +2 more
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A nonlinear model of thermoacoustic devices
The Journal of the Acoustical Society of America, 2002This paper presents a nonlinear, time-domain model of thermoacoustic devices based on cross-sectional averaged equations. Heat transfer perpendicular to the device axis—which lies at the core of thermoacoustic effects—is modeled in a novel and more realistic way. Heat conduction in the solid surfaces surrounding the fluid medium is included.
Karpov, Sergey, Prosperetti, Andrea
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