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Entropy 2016, 18(8), 301;

Thermal Analysis of Shell-and-Tube Thermoacoustic Heat Exchangers

Department of Aerospace Engineering, Sharif University of Technology, Tehran 11365-8639, Iran
Author to whom correspondence should be addressed.
Academic Editor: Kevin H. Knuth
Received: 7 June 2016 / Revised: 2 August 2016 / Accepted: 8 August 2016 / Published: 16 August 2016
(This article belongs to the Section Thermodynamics)
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Heat exchangers are of key importance in overall performance and commercialization of thermoacoustic devices. The main goal in designing efficient thermoacoustic heat exchangers (TAHXs) is the achievement of the required heat transfer rate in conjunction with low acoustic energy dissipation. A numerical investigation is performed to examine the effects of geometry on both the viscous and thermal-relaxation losses of shell-and-tube TAHXs. Further, the impact of the drive ratio as well as the temperature difference between the oscillating gas and the TAHX tube wall on acoustic energy dissipation are explored. While viscous losses decrease with d i / δ κ , thermal-relaxation losses increase; however, thermal relaxation effects mainly determine the acoustic power dissipated in TAHXs. The results indicate the existence of an optimal configuration for which the acoustic energy dissipation minimizes depending on both the TAHX metal temperature and the drive ratio. View Full-Text
Keywords: heat exchangers; thermoacoustics; shell-and-tube; acoustic energy; dissipation heat exchangers; thermoacoustics; shell-and-tube; acoustic energy; dissipation

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Gholamrezaei, M.; Ghorbanian, K. Thermal Analysis of Shell-and-Tube Thermoacoustic Heat Exchangers. Entropy 2016, 18, 301.

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