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Article

Numerical Optimization of a Single Bunch of NiTi Wires to Be Placed in an Elastocaloric Experimental Device: Preliminary Results

Department of Industrial Engineering, University of Naples Federico II, Pl.e Tecchio 80, 80125 Naples, Italy
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Author to whom correspondence should be addressed.
Academic Editor: Carlos J. Gómez García
Magnetochemistry 2021, 7(5), 67; https://doi.org/10.3390/magnetochemistry7050067
Received: 20 April 2021 / Revised: 11 May 2021 / Accepted: 12 May 2021 / Published: 15 May 2021
(This article belongs to the Special Issue Magnetocaloric and Caloric Materials for Solid-State Cooling)
Italy has not yet presented to the scientific community any elastocaloric prototype suitable for refrigeration/air conditioning. The SUSSTAINEBLE project was born from the idea to build a demonstrative elastocaloric prototype for environmental conditioning. The prototype is planned to be rotary and composed by a few bunches of elastocaloric wires crossed by air as heat transfer fluid. Many are the parameters to be investigated before the realization of the device. A numerical practical tool would help to easily optimize the prototype. In this paper a two-dimensional tool of a single bunch of elastocaloric wires based on finite-element method is introduced; it can reproduce step by step the velocity and the pressure field of fluid to predict more accurately the solid-to-fluid heat exchange. The results of a test campaign mostly focused on the optimization of the frequency of the cycle, fluid velocity and the distance between the elastocaloric wires are presented. The results reveal that: (i) 0.12 Hz as frequency; (ii) 7 m s−1 as velocity; (iii) 1.0 mm as optimal wire distance, would better satisfy the trade-off existing in the maximization of temperature span and cooling power per mass unit: 23.7 K and 311.97 W kg−1 are the values achieved, respectively. View Full-Text
Keywords: elastocaloric; device; Ni-Ti; numerical tool; model; optimization; temperature span; cooling power elastocaloric; device; Ni-Ti; numerical tool; model; optimization; temperature span; cooling power
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MDPI and ACS Style

Cirillo, L.; Farina, A.R.; Greco, A.; Masselli, C. Numerical Optimization of a Single Bunch of NiTi Wires to Be Placed in an Elastocaloric Experimental Device: Preliminary Results. Magnetochemistry 2021, 7, 67. https://doi.org/10.3390/magnetochemistry7050067

AMA Style

Cirillo L, Farina AR, Greco A, Masselli C. Numerical Optimization of a Single Bunch of NiTi Wires to Be Placed in an Elastocaloric Experimental Device: Preliminary Results. Magnetochemistry. 2021; 7(5):67. https://doi.org/10.3390/magnetochemistry7050067

Chicago/Turabian Style

Cirillo, Luca, Adriana R. Farina, Adriana Greco, and Claudia Masselli. 2021. "Numerical Optimization of a Single Bunch of NiTi Wires to Be Placed in an Elastocaloric Experimental Device: Preliminary Results" Magnetochemistry 7, no. 5: 67. https://doi.org/10.3390/magnetochemistry7050067

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