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Effect of Stack Spacing on the Performance of Thermoacoustic Refrigerators Using Helium and Air as Working Substances

Prashantha, BG and Seetharamu, S and Narasimham, GSVL and Praveen Kumar, MR (2019) Effect of Stack Spacing on the Performance of Thermoacoustic Refrigerators Using Helium and Air as Working Substances. In: International Journal of Air-Conditioning and Refrigeration, 27 (2).

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Official URL: https://doi.org/10.1142/S2010132519500160

Abstract

This paper deals with the design of thermoacoustic refrigerators using linear thermoacoustic theory. The refrigerator components are designed at 3 drive ratio by considering the practical limitations of providing sufficient spacing for attaching the loudspeaker to the resonator tube and accommodating instrumentation. The effects of spiral stack spacing in terms of thermal penetration depth on the theoretical performance of refrigerator using helium and air as working substances are discussed. The quarter-wavelength resonator designs with taper and divergent section terminated with hemispherical end are optimized with helium and air for better performance. Theoretical results are validated with DeltaEC software results and are in agreement with each other. Helium shows better performance compared to air but lacks power density. The DeltaEC predicts COP 0.514 at the cold heat exchanger temperature of -30°C with helium compared to air (COP 0.616 at 8.8°C) for the 50W cooling power 100mm diameter quarter-wavelength resonator designs.

Item Type: Journal Article
Publication: International Journal of Air-Conditioning and Refrigeration
Publisher: World Scientific Publishing Co. Pte Ltd
Additional Information: The copyright for this article belongs to World Scientific Publishing Co. Pte Ltd
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 27 Dec 2022 04:40
Last Modified: 27 Dec 2022 04:40
URI: https://eprints.iisc.ac.in/id/eprint/78552

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