High Frequency Thermoacoustic Refrigerator
Annual summary rept. 2 Sep 1993-31 May 1994
UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS
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A small thermoacoustic refrigerator was developed for operation at 5 kHz. Its main components are a piezoelectric driver of the bimorph type, a cotton wool stack, a 12-wave resonator operated at its 3rd harmonic, and photolithographically processed copper heat exchangers. Tests with air at 1 atmosphere as the working gas produced a temperature difference Delta T across the stack of 32 deg C in 4 seconds for an acoustic power input level of 160 dB. The refrigerator did not have thermal insulation. Improved performance is expected with pressurized helium gas and helium-xenon mixtures. The performance of this refrigerator and its small size make it attractive for applications in high speed electronics and possibly IR detectors.
- Air Conditioning, Heating, Lighting and Ventilating
- Electricity and Magnetism