Porous Cores in Small Thermoacoustic Devices for Building Applications

Fabio Auriemma, Elio Di Giulio, Marialuisa Napolitano and Raffaele Dragonetti
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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

Energies, 2020, vol. 13, issue 11, 1-19

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.

Keywords: thermoacoustic heat engine; solar energy; solar cooling (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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