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Title: Thermoacoustic energy conversion in a square duct
Authors: Harikumar, Govind
Ho, Ker Hin
Wang, Kai
Dubey, Swapnil
Duan, Fei
Keywords: Thermoacoustics
Issue Date: 2019
Source: Harikumar, G., Ho, K. H., Wang, K., Dubey, S., & Duan, F. (2019). Thermoacoustic energy conversion in a square duct. Energy Procedia, 158, 1811-1816. doi:10.1016/j.egypro.2019.01.425
Series/Report no.: Energy Procedia
Abstract: The present study aims to demonstrate the thermoacoustic energy conversion phenomenon in a standing wave resonator driven by a commercial loudspeaker with a stack made of plastic straws and atmospheric air as the working fluid. The system is driven at resonance frequency of 70 Hz with the stack kept in the middle section of the resonator and a temperature difference of 14.1℃ was produced between the ends of the stack at a drive ratio of 3.57 %. The hot end reached a temperature of 36.5℃ and the cold end reached a temperature of 22.4℃ at the highest drive ratio. Moving the stack towards the end of the resonator reduces the temperature difference produced showing the influence of stack position. Thermoacoustic devices offer an environment-friendly solution to utilize waste heat or renewable energy sources, to upgrade low grade heat or generate cooling or produce electricity using acoustic-electric transducers. This study is done as a pre-cursor, to develop a relatively inexpensive prototype for studying non-linear effects at high drive ratios seen in thermoacoustic devices, which are known to reduce their performance.
ISSN: 1876-6102
DOI: 10.1016/j.egypro.2019.01.425
Rights: © 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:ERI@N Journal Articles

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