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Effect of gas blockage on the theoretical performance of thermoacoustic refrigerators

Prashantha, BG and Narasimham, GSVL and Seetharamu, S and Manjunatha, K (2021) Effect of gas blockage on the theoretical performance of thermoacoustic refrigerators. In: International Journal of Air-Conditioning and Refrigeration, 29 (3).

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Official URL: https://doi.org/10.1142/S2010132521500267


Thermoacoustic refrigeration is an emerging green, novel and promising alternate technology compared to vapor compression refrigerator systems for domestic cooling. It uses environmentally benign gases like air or helium or the mixture of inert gases as working substances and has no moving parts, no lubrication and no vibration. The cooler is designed and optimized with helium and air as refrigerants operating at 10 bar with 3 drive ratio for the temperature di®erence of 28 K and stack diameter of 200 mm using linear thermoacoustic theory. In this paper, the e®ect of gas blockage (porosity) of the spiral-stack heat exchanger system ranging from 45 to 85 on the theoretical performance of the cooler is discussed. The one-third and one-fourth wavelength convergent�divergent resonator designs are optimized with air and helium as working substances, respectively, to improve performance and power density. The optimized coolers show best performance with 85 porosity. The theoretical results are validated with DeltaEC software simulation results. The simulation results show the coe±cient of performance and cooling capacity of 0.93 and 219 W for helium and of 0.50 and 139 W for air, respectively, at the cold heat exchanger temperature of 0°C. © World Scienti¯c Publishing Company.

Item Type: Journal Article
Publication: International Journal of Air-Conditioning and Refrigeration
Publisher: World Scientific
Additional Information: The copyright for this article belongs to World Scientific
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 28 Nov 2021 06:52
Last Modified: 28 Nov 2021 06:52
URI: http://eprints.iisc.ac.in/id/eprint/70432

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