Accession Number:

ADA280925

Title:

High Frequency Thermoacoustic Refrigerator

Descriptive Note:

Annual summary rept. 2 Sep 1993-31 May 1994

Corporate Author:

UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS

Personal Author(s):

Report Date:

1994-06-16

Pagination or Media Count:

14.0

Abstract:

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.

Subject Categories:

  • Air Conditioning, Heating, Lighting and Ventilating
  • Acoustics
  • Electricity and Magnetism
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE