Accession Number:

ADA280326

Title:

Miniature Thermoacoustic Refrigerator.

Descriptive Note:

Final rept.,

Corporate Author:

UTAH UNIV SALT LAKE CITY DEPT OF PHYSICS

Personal Author(s):

• Symko, Orest G.

Report Date:

1994-04-21

Pagination or Media Count:

22.0

Abstract:

A miniature thermoacoustic refrigerator was developed for cooling electronic components. The refrigerator is driven at 5,000 Hz by a piezoelectric driver and it consists of an acoustic resonator, a stack, and copper heat exchangers. The working fluid is pressurized helium gas between 10 to 20 atmospheres. Sound was produced with different piezoelectric drivers, a monomorph, a bimorph, and Tonpilz driver to achieve the highest intensity possible. Since the operating frequency is high, the refrigerator is compact, being about 10 cm long. Temperature differences of 12 deg C across the stack were achieved at sound levels of l60dB. The performance of the refrigerator scaled with frequency according to existing models of thermoacoustic heat engines.

Descriptors:

• *ELECTRONICS
• *COOLING
• *REFRIGERATION SYSTEMS
• *ELECTROACOUSTICS
• FREQUENCY
• TEMPERATURE
• MODELS
• ACOUSTIC RESONATORS
• ENGINES
• FLUIDS
• RESONATORS
• HEAT ENGINES
• ATMOSPHERES
• HEAT
• ACOUSTIC EQUIPMENT
• HELIUM
• ACOUSTICS
• SOUND
• COPPER
• INTENSITY
• HEAT EXCHANGERS
• ENERGY TRANSFER

Subject Categories:

• Air Conditioning, Heating, Lighting and Ventilating

Distribution Statement:

APPROVED FOR PUBLIC RELEASE