Cover Image

Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator

Numerous reports have established the refrigeration applications of thermoacoustic cooling without compressors and refrigerants. Significant cooling effects can be obtained in a thermoacoustic resonator fitted with a heat exchanging stack and operated at resonance frequency. Past studies, however, h...

Full description

Saved in:
Bibliographic Details
Main Authors: Mohd. Ghazali, N., Ghazali, A. D., Ali, I. S., Rahman, M. A. A.
Format: Conference or Workshop Item
Published: 2012
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/47031/
http://dx.doi.org/10.1063/1.4704354
Tags: Add Tag
No Tags, Be the first to tag this record!
id my.utm.47031
record_format eprints
spelling my.utm.470312018-10-14T08:19:42Z http://eprints.utm.my/id/eprint/47031/ Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator Mohd. Ghazali, N. Ghazali, A. D. Ali, I. S. Rahman, M. A. A. TP Chemical technology Numerous reports have established the refrigeration applications of thermoacoustic cooling without compressors and refrigerants. Significant cooling effects can be obtained in a thermoacoustic resonator fitted with a heat exchanging stack and operated at resonance frequency. Past studies, however, have hardly referred to the fundamental relationship between resonant frequency and the resonator geometry. This paper reports the thermoacoustic cooling effects at resonance obtained by changing the diameter of the resonator while holding the length constant and vice versa. Experiments were completed at atmospheric pressure with air as the working fluid using a number of pvc tubes having parallel plate stack from Mylar. The temperature difference measured across the stack showed that a volume increase in the working fluid in general increases the temperature gradient for the quarter-and half-wavelength resonators. Doubling the diameter from 30 mm to 60 mm produced the highest temperature difference due to the greater number of stack plates resulting in a higher overall thermoacaoustic cooling. Increasing the resonator length only produced a small increase in temperature gradient since the resonant frequency at operation is only slightly changed. Investigation on the aspect ratio exhibits no influence on the temperature difference across the stack. This study have shown that the resonator length and diameter do affect the temperature difference across the thermoacoustic stack, and further research should be done to consider the contribution of the stack mass on the overall desired thermoacoustic cooling. 2012 Conference or Workshop Item PeerReviewed Mohd. Ghazali, N. and Ghazali, A. D. and Ali, I. S. and Rahman, M. A. A. (2012) Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator. In: 4th International Meeting of Advances in Thermofluids, IMAT 2011, 3-4, Oct 2011, Melaka, Malaysia. http://dx.doi.org/10.1063/1.4704354 10.1063/1.4704354
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Mohd. Ghazali, N.
Ghazali, A. D.
Ali, I. S.
Rahman, M. A. A.
Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator
description Numerous reports have established the refrigeration applications of thermoacoustic cooling without compressors and refrigerants. Significant cooling effects can be obtained in a thermoacoustic resonator fitted with a heat exchanging stack and operated at resonance frequency. Past studies, however, have hardly referred to the fundamental relationship between resonant frequency and the resonator geometry. This paper reports the thermoacoustic cooling effects at resonance obtained by changing the diameter of the resonator while holding the length constant and vice versa. Experiments were completed at atmospheric pressure with air as the working fluid using a number of pvc tubes having parallel plate stack from Mylar. The temperature difference measured across the stack showed that a volume increase in the working fluid in general increases the temperature gradient for the quarter-and half-wavelength resonators. Doubling the diameter from 30 mm to 60 mm produced the highest temperature difference due to the greater number of stack plates resulting in a higher overall thermoacaoustic cooling. Increasing the resonator length only produced a small increase in temperature gradient since the resonant frequency at operation is only slightly changed. Investigation on the aspect ratio exhibits no influence on the temperature difference across the stack. This study have shown that the resonator length and diameter do affect the temperature difference across the thermoacoustic stack, and further research should be done to consider the contribution of the stack mass on the overall desired thermoacoustic cooling.
format Conference or Workshop Item
author Mohd. Ghazali, N.
Ghazali, A. D.
Ali, I. S.
Rahman, M. A. A.
author_facet Mohd. Ghazali, N.
Ghazali, A. D.
Ali, I. S.
Rahman, M. A. A.
author_sort Mohd. Ghazali, N.
title Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator
title_short Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator
title_full Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator
title_fullStr Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator
title_full_unstemmed Geometry effects on cooling in a standing wave cylindrical thermoacousic resonator
title_sort geometry effects on cooling in a standing wave cylindrical thermoacousic resonator
publishDate 2012
url http://eprints.utm.my/id/eprint/47031/
http://dx.doi.org/10.1063/1.4704354
_version_ 1643652214426697728
score 13.211869

Similar Items