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Porous Cores in Small Thermoacoustic Devices for Building Applications

Author

Listed:
  • Fabio Auriemma

    (Department of Mechanical and Industrial Engineering, Tallinn University of Technology—TalTech, 19086 Tallinn, Estonia)

  • Elio Di Giulio

    (Department of Industrial Engineering, University of Naples Federico II, 80125 Naples, Italy)

  • Marialuisa Napolitano

    (Department of Industrial Engineering, University of Naples Federico II, 80125 Naples, Italy)

  • Raffaele Dragonetti

    (Department of Industrial Engineering, University of Naples Federico II, 80125 Naples, Italy)

Abstract

The thermoacoustic behavior of different typologies of porous cores is studied in this paper with the goal of finding the most suitable solution for small thermoacoustic devices, including solar driven air coolers and generators, which can be used in future buildings. Cores provided with circular pores, with rectangular slits and with arrays of parallel cylindrical pins are investigated. For the type of applications in focus, the main design constraints are represented by the reduced amount of the input heat power and the size limitations of the device. In this paper, a numerical procedure has been implemented to assess the behavior of the different core typologies. For a fixed input heat power, the maximum acoustic power delivered by each core is computed and the corresponding engine configuration (length of the resonator and position of the core) is provided. It has been found that cores with parallel pins provide the largest amount of acoustic power with the smallest resonator length. This conclusion has been confirmed by experiments where additive manufactured cores have been tested in a small, light-driven, thermoacoustic prime mover.

Suggested Citation

  • Fabio Auriemma & Elio Di Giulio & Marialuisa Napolitano & Raffaele Dragonetti, 2020. "Porous Cores in Small Thermoacoustic Devices for Building Applications," Energies, MDPI, vol. 13(11), pages 1-19, June.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:11:p:2941-:d:368876
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    References listed on IDEAS

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    1. Boe-Shong Hong & Tsu-Yu Lin, 2015. "System Identification and Resonant Control of Thermoacoustic Engines for Robust Solar Power," Energies, MDPI, vol. 8(5), pages 1-22, May.
    2. Antonio Piccolo & Alessio Sapienza & Cecilia Guglielmino, 2019. "Convection Heat Transfer Coefficients in Thermoacoustic Heat Exchangers: An Experimental Investigation," Energies, MDPI, vol. 12(23), pages 1-10, November.
    3. Napolitano, Marialuisa & Romano, Rosario & Dragonetti, Raffaele, 2017. "Open-cell foams for thermoacoustic applications," Energy, Elsevier, vol. 138(C), pages 147-156.
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    Cited by:

    1. Umar Nawaz Bhatti & Salem Bashmal & Sikandar Khan & Rached Ben-Mansour, 2020. "Numerical Modeling and Performance Evaluation of Standing Wave Thermoacoustic Refrigerators with a Multi-Layered Stack," Energies, MDPI, vol. 13(17), pages 1-25, August.
    2. Chen, Geng & Tang, Lihua & Mace, Brian & Yu, Zhibin, 2021. "Multi-physics coupling in thermoacoustic devices: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 146(C).
    3. Jakub Kajurek & Artur Rusowicz, 2020. "Experimental Investigation on the Thermoacoustic Effect in Easily Accessible Porous Materials," Energies, MDPI, vol. 14(1), pages 1-10, December.

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