Recyclable rocking chair smart grid sustainable design sustainable house plans sustainable living sustainable products sustainable transportation thermoacoustic engine ❋ Unknown (2010)
The speakers work by a thermoacoustic effect: They vibrate and make noise when heated by an electrical current. ❋ Unknown (2009)
Prof. Orest Symko uses the thermoacoustic effect to create pressure waves in a tube that vibrates a piezoelectric material that converts the sound energy directly into electricity. ❋ Unknown (2007)
A few weeks ago I reported here on a thermoacoustic stove that also provides cooling and electric power. ❋ Unknown (2007)
Now, the Denver-based company Swift LNG aims to turn that gas into a usable liquid fuel with a thermoacoustic natural gas liquefaction technology just licensed from Los Alamos National Laboratory. ❋ William Harryman (2007)
The company is supporting research into thermoacoustic refrigeration to minimize the potential negative environmental impact from using ozone-depleting refrigerants. ❋ Kerron Cross (2006)
The traveling-wave thermoacoustic electric generator has the potential to power space probes to the furthest reaches of the Universe. ❋ Unknown (2004)
"The research results provide useful insights into the optimization of nanotube sheets as thermoacoustic projectors for loud speaker and sonar applications, where sound is produced by heating using an alternating electrical current." ❋ Unknown (2011)
"The research results provide useful insights into the optimization of nanotube sheets as thermoacoustic projectors for loud speaker and sonar applications, where sound is produced by heating using an alternating electrical current," he said. ❋ Unknown (2011)
A thermoacoustic compressor can potentially complete 10,000 cycles a second, according to Scott Elrod, vice president of the hardware systems laboratory and head of PARC's green tech efforts. ❋ Bw (2010)
Palo Alto Research Center (PARC) has launched an effort to replace the mechanical compressors in refrigerators and air conditioners with thermoacoustic compressors. ❋ Bw (2010)
"The thermoacoustic effect utilizes the fact that sound, i.e. adiabatic pressure fluctuation of air, is accompanied by fluctuation in air temperature," coauthor Juha Hassel of the VTT Technical Research Center of Finland told PhysOrg. com. ❋ Unknown (2009)
"Suspended metal wire array as a thermoacoustic sound source." ❋ Unknown (2009)
Like the nanotube loudspeaker, the wire arrays also use the thermoacoustic effect to produce sound. ❋ Unknown (2009)
Image copyright: Niskanen, et al. (PhysOrg. com) -- In 2008, scientists built a loudspeaker made of carbon nanotubes that produced sound and music based on the thermoacoustic effect. ❋ Unknown (2009)
What's more, some of the pipe's vibrations can also be passed into another thermoacoustic engine, which works in reverse to generate a cooling effect. ❋ Unknown (2009)
Being a Stirling engine fan, I have been fascinated by Los Alamos Labs experiments with thermoacoustic Stirling engines for small capacity gas liquefaction - no moving parts, just a very loud noise in a heated box. ❋ Unknown (2009)
Martin, head of a private Melbourne-based company called Docklands Science Park, reckons he has the answer -- a patented CCS process called pulse combustion driven thermoacoustic refrigeration (PUTAR). ❋ Unknown (2009)
The thermoacoustic effect is more suitable for producing higher frequency sounds, such as ultrasound, and the scientists found that the device could produce sounds with frequencies up to 40,000 Hz. well beyond the normal human hearing range of 20 - 20,000 Hz. The scientists predict that the thermoacoustic speakers could be used in ultrasound applications, such as SONARs ( "sound radars"), gas sensors, and distance sensors. ❋ Unknown (2009)
