Thermal performance of finned-tube thermoacoustic heat exchangers in oscillatory flow conditions

W Kamsanam, X Mao, AJ Jaworski

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Heat exchangers play a key role in the overall performance of thermoacoustic devices. Due to the complex nature of oscillatory flows, the underlying mechanism of heat transfer in oscillatory flows is still not fully understood. This work investigates the effect of fin length and fin spacing on the thermal performance of finned-tube heat exchangers. The heat transfer rate between two finned-tube heat exchangers arranged side-by-side in an oscillatory flow was measured over a range of testing conditions. The results are presented in terms of heat transfer coefficient and heat transfer effectiveness. Comparisons are made between experimental results of this work and a number of models, such as, the Time-Average Steady-Flow Equivalent (TASFE) model, the Root Mean Square Reynolds Number (RMS-Re) model and the boundary layer conduction model, as well as several empirical correlations in literature. A new empirical correlation is proposed to be used for the prediction of thermal performance for finned-tube heat exchangers in oscillatory flows. The uncertainties associated with the measurement of heat flux are estimated.
Original languageEnglish
Pages (from-to)169-180
Number of pages12
JournalInternational Journal of Thermal Sciences
Volume101
Early online date5 Dec 2015
DOIs
Publication statusPublished - Mar 2016
Externally publishedYes

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Thermoacoustics
Tubes (components)
heat exchangers
tube heat exchangers
Heat exchangers
tubes
heat transfer
fins
Heat transfer
steady flow
Steady flow
heat transfer coefficients
Heat transfer coefficients
Heat flux
heat flux
boundary layers
Reynolds number
Boundary layers
spacing
conduction

Cite this

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abstract = "Heat exchangers play a key role in the overall performance of thermoacoustic devices. Due to the complex nature of oscillatory flows, the underlying mechanism of heat transfer in oscillatory flows is still not fully understood. This work investigates the effect of fin length and fin spacing on the thermal performance of finned-tube heat exchangers. The heat transfer rate between two finned-tube heat exchangers arranged side-by-side in an oscillatory flow was measured over a range of testing conditions. The results are presented in terms of heat transfer coefficient and heat transfer effectiveness. Comparisons are made between experimental results of this work and a number of models, such as, the Time-Average Steady-Flow Equivalent (TASFE) model, the Root Mean Square Reynolds Number (RMS-Re) model and the boundary layer conduction model, as well as several empirical correlations in literature. A new empirical correlation is proposed to be used for the prediction of thermal performance for finned-tube heat exchangers in oscillatory flows. The uncertainties associated with the measurement of heat flux are estimated.",
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Thermal performance of finned-tube thermoacoustic heat exchangers in oscillatory flow conditions. / Kamsanam, W; Mao, X; Jaworski, AJ.

In: International Journal of Thermal Sciences, Vol. 101, 03.2016, p. 169-180.

Research output: Contribution to journalArticle

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AU - Mao, X

AU - Jaworski, AJ

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AB - Heat exchangers play a key role in the overall performance of thermoacoustic devices. Due to the complex nature of oscillatory flows, the underlying mechanism of heat transfer in oscillatory flows is still not fully understood. This work investigates the effect of fin length and fin spacing on the thermal performance of finned-tube heat exchangers. The heat transfer rate between two finned-tube heat exchangers arranged side-by-side in an oscillatory flow was measured over a range of testing conditions. The results are presented in terms of heat transfer coefficient and heat transfer effectiveness. Comparisons are made between experimental results of this work and a number of models, such as, the Time-Average Steady-Flow Equivalent (TASFE) model, the Root Mean Square Reynolds Number (RMS-Re) model and the boundary layer conduction model, as well as several empirical correlations in literature. A new empirical correlation is proposed to be used for the prediction of thermal performance for finned-tube heat exchangers in oscillatory flows. The uncertainties associated with the measurement of heat flux are estimated.

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