THERMAL SCIENCE

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Liu Liu

,

Yingwen Liu

NUMERICAL STUDY ON A THERMOACOUSTIC REFRIGERATOR WITH CONTINUOUS AND STAGGERED ARRANGEMENTS

ABSTRACT
Thermoacoustic devices require heat exchangers with oscillating flow, but there is currently no viable design approach for them. A heat exchanger with a staggered structure can efficiently improve the velocity disturbance and promote heat transfer in steady flow. The flow and heat transfer characteristics of a standing-wave thermoacoustic refrigerator and an ambient heat exchanger with staggered parallel plates under the oscillating flow condition are investigated in this study, primarily focusing on the geometric influences and differences between staggered and non-staggered (continuous) arrangements. The CFD simulation is a mainstream tool for the numerical simulation of complex thermoacoustic phe¬nomena. The flow field around the stack and heat exchanger plate is simulated by introducing the dynamic mesh boundary conditions. Through numerical simulation, the flow field characteristics of non-linear vortices generation around the heat exchanger are presented. By changing the staggered column number in the ambient heat exchanger, it is observed that the larger the column number of staggered parallel plates, the more significant the refrigeration effect through the thermoacoustic effect.
KEYWORDS
thermoacoustic, refrigerator, ambient heat exchanger, staggered, column number
PAPER SUBMITTED: 2021-09-01
PAPER REVISED: 2021-11-09
PAPER ACCEPTED: 2021-12-02
PUBLISHED ONLINE: 2022-03-05
DOI REFERENCE: https://doi.org/10.2298/TSCI210901025L
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 5, PAGES [3939 - 3949]
REFERENCES
  1. Namdar, A., et. al, Numerical investigation of thermoacoustic refrigerator at weak and large amplitudes considering cooling effect, Cryogenics., 67 (2015), pp. 36-44.
  2. El-Rahman, A.A., et. al. A 3D investigation of thermoacoustic fields in a square stack, Int. J. Heat. Mass. Tran., 108 (2017), pp. 292-300.
  3. Cao, N., et. al., Energy flux density in a thermoacoustic couple, J. Acoust. Soc. Am., 99 (1996), pp. 3456-3464.
  4. Worlikar, A.S., et. al., Numerical simulation of a thermoacoustic refrigerator: II. Stratified flow around the stack, J. Comput. Phys., 144 (1998), 2, pp. 299-324.
  5. Besnoin, E., Knio, O.M., Numerical study of thermoacoustic heat exchangers in the thin plate limit, Numer. Heat. Transfer, Part A., 40 (2001), 5, pp. 445-471.
  6. Marx, D., Blanc-Benon, P., Numerical calculation of the temperature difference between the extremities of a thermoacoustic stack plate, Cryogenics., 45 (2005), 3, pp. 163-172.
  7. Jaworski, A.J., Piccolo, A., Heat transfer processes in parallel-plate heat exchangers of thermoacoustic devices - numerical and experimental approaches, Appl. Therm. Eng., 42 (2012), pp. 145-153.
  8. Ilori, O.M., et. al., Experimental and numerical investigations of thermal characteristics of heat exchangers in oscillatory flow, Appl. Therm. Eng., 144 (2018), pp. 910-925.
  9. Chamkha, A.J., et. al., Magnetohydrodynamic Mixed Convection and Entropy Analysis of Nanofluid in Gamma-Shaped Porous Cavity, J. Thermophys. Heat Transf., 34 (2020), 10, pp.1-12.
  10. Bahmani, A., Kargarsharifabad, H., Magnetohydrodynamic free convection of non-Newtonian power-law fluids over a uniformly heated horizontal plate, Therm. Sci., 24 (2020), 2, pp. 1323-1334.
  11. Bahmani, A., Kargarsharifabad, H., Laminar natural convection of power-law fluids over a horizontal heated flat plate. Heat Transf.-Asian Re., 48 (2019), 3, pp. 1044-1066.
  12. Manevitch, L.I., Vakakis, A.F., Nonlinear Oscillatory Acoustic Vacuum. SIAM J. Appl. Math., 74 (2014), 6, pp. 1742-1762.
  13. Bouvier, P., et. al., Experimental study of heat transfer in oscillating flow, Int. J. Heat. Mass. Tran., 48 (2005), 12, pp. 2473-2482.
  14. Kargarsharifabad, H., Experimental and numerical study of natural convection of Cu-water nanofluid in a cubic enclosure under constant and alternating magnetic fields. Int. Commun. Heat Mass Transf., 119 (2020), 8, pp. 104957.
  15. Asadikia, A., et. al., Characterization of thermal and electrical properties of hybrid nanofluids prepared with multi-walled carbon nanotubes and Fe2O3 nanoparticles. Int. Commun. Heat Mass Transf., 117 (2020), pp. 104603.
  16. Nsofor, E.C., et. al., Experimental study on the heat transfer at the heat exchanger of the thermoacoustic refrigerating system, Appl. Therm. Eng., 27 (2007), 14-15, pp. 2435-2442.
  17. Elaziz, M.A., et. al., Improved prediction of oscillatory heat transfer coefficient for a thermoacoustic heat exchanger using modified adaptive neuro-fuzzy inference system, Int. J. Refrig., 102 (2019), pp. 47-54.
  18. Liu, B.Q., et. al., Theoretical model of a Stirling/Pulse tube hybrid refrigerator and its verification, Appl. Therm. Eng., 189 (2021), pp. 116587.
  19. Wu, Z.J., et. al., Experimental investigation on heat transfer characteristics of staggered tube bundle heat exchanger immersed in oscillating flow, Int. J. Heat. Mass. Tran., 148 (2020), pp. 119-125.
  20. Erguvan, M., Macphee, D.W., Second law optimization of heat exchangers in waste heat recovery, Int. J. Energy. Res., 43 (2019), pp. 5714-5734
  21. Suzuki, K., et. al., Mechanism of heat transfer enhancement due to self-sustained oscillation for an in-line fin array, Int. J. Heat. Mass. Transfer., 37 (1994), l, pp. 83-96.
  22. Ali, A.H.H., et. al., Investigation of heat transfer and fluid flow in transitional regime inside a channel with staggered plates heated by radiation for PV/T system, Energy., 59 (2013), 9, pp. 255-264.
  23. Ali, A.H.H., Design optimization of staggered plates' channel heated by radiation heat flux based on the convective heat transfer and fluid flow for hybrid Photovoltaic/Thermal system, Sustain. Energy. Techn., 19 (2017), 12, pp. 1-20.
  24. El-Rahman, A.A., Abdel-Rahman, E., Computational fluid dynamics simulation of a thermoacoustic refrigerator, J. Thermophys. Heat. Transf., 28 (2014), pp. 78-86.
  25. Mergen, S., et. al., Numerical study on effects of computational domain length on flow field in standing wave thermoacoustic couple, Cryogenics., 98 (2019), pp. 139-147.
  26. Allafi, W.A., et. al., Fluid dynamics of oscillatory flow across parallel-plates in standing-wave thermoacoustic system with two different operation frequencies. Eng. Sci. Technol., 24 (2021), 1, pp. 41-49.
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Numerical study on a thermoacoustic refrigerator with continuous and staggered arrangements

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence