High Frequency Thermoacoustic Refrigerator

reportActive / Technical Report | Accession Number: ADA280925 | Open PDF

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.

Author(s):
Symko, Orest G.
Author Organization(s):
UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS
Descriptive Note:
Annual summary rept. 2 Sep 1993-31 May 1994
Pagination:
0014

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
01
Contract/Grant Number(s):
N00014-93-J-1126
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_3.2_Engagement; JCA_3_Force Application; JCA_1.2.7_Experimentation; JCA_1.2_Force Preparation; JCA_1_Force Support; JCA_3.2.1_Kinetic Means; JCA_5.3_Planning; JCA_5_Command and Control; JCA_6_Net Centric
Modernization Areas:
Microelectronics
Communities of Interest:
Human Systems
Descriptor(s):
*HIGH FREQUENCY, *HEAT EXCHANGERS, *HEAT PUMPS, *REFRIGERATION SYSTEMS, THERMAL PROPERTIES, ELECTRONICS, COPPER, INFRARED DETECTORS, POWER, RESONATORS, WAVES, THERMAL INSULATION, PHOTOLITHOGRAPHY, XENON, HELIUM, ACOUSTICS, PIEZOELECTRIC MATERIALS, GASES, AIR, TEMPERATURE
Field(s)/Group(s):
Air Conditioning, Heating, Lighting and Ventilating, Acoustics, Electricity and Magnetism, Thermodynamics
Keyword(s):
*THERMOACOUSTICS, REFRIGERATORS, CARNOT ENGINES, BIMORPHS, DRIVERS, PE61153N
Report Date:
1994 Jun 16