4.7 Article

A numerical comparison among different solutions for the design of a rotary elastocaloric prototype

期刊

APPLIED THERMAL ENGINEERING
卷 228, 期 -, 页码 -

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.applthermaleng.2023.120487

关键词

ElastoCaloric materials; Numerical model; Caloric device; Regenerator; Solid-state cooling; Efficiency

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This paper presents a detailed analysis for efficiently designing the first Italian elastoCaloric prototype. Different geometries were compared through numerical simulations to optimize the geometric and operational parameters before constructing the prototype. The results show a temperature drop of 21.5 K and cooling power of 538 W with a coefficient of performance greater than 6.
Among the various emerging proposals in the scientific literature, the class of solid-state refrigeration techniques based on the caloric effect is particularly important. In caloric cooling, there are three types of technology: magnetocaloric, electrocaloric and mechanocaloric, each referring to the field applied to a material which is respectively magnetic, electric or mechanical. The paper presents the results of a detailed analysis to draw a guide map for efficiently designing the first Italian elastoCaloric prototype. It was possible to compare different geometries through a numerical model to optimize the geometric and operational parameters before to construct a rotary elastoCaloric prototype. In this work, the results of numerical simulations are presented in terms of temperature drop on cold side and cooling power. It was also possible to give useful indications in terms of the prototype's efficiency through the evaluation of the coefficient of performance. The best results obtained are: 21.5 K as temperature drop on cold in the cold regenerator, 538 W as cooling power with a COP greater than 6.

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