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ECN publication
Study of a coaxial thermoacoustic-Stirling cooler
Published by: Publication date:
ECN Energy Efficiency in Industry 8-5-2008
ECN report number: Document type:
ECN-W--08-013 Article (scientific)
Number of pages:

Published in: Cryogenics (Elsevier), , 2008, Vol.vol. 48, p.77-82.

A coaxial thermoacoustic-Stirling cooler is built and performance measurements are performed. The cooler uses the acoustic power produced by a linear motor to pump heat through a regenerator from a cold heat exchanger to an ambient one. The cooler incorporates a compact acoustic network to create the traveling-wave phasing necessary for the operation in a Stirling cycle. The network has a coaxial geometry instead of the toroidal one usually used in such systems. The design, construction and performance measurements of the cooler are presented. A measured coefficient of performance relative to Carnot of 25% and a low temperature of -54 degrees C are achieved by the cooler. This efficiency surpasses the performance of the most efficient standing-wave cooler by almost a factor of two.

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