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Thermodynamic comparison of magnetocaloric and vapor compression wine coolers.

Author(s) : DE SA N. M., NAKASHIMA A. T. D., LOZANO J. A., BARBOSA J. R. Jr

Type of article: IJR article

Summary

This paper presents a comparison of the thermodynamic performances of magnetocaloric and vapor compression cooling technologies when operating the same wine cooler cabinet. The vapor compression system used is a commercially available 31-bottle domestic wine cooler, while the magnetocaloric cooling device is a state-of-the-art (TRL-5) prototype connected to the retrofitted wine cooler cabinet. The test procedures involved characterizing the unsteady and steady-state behavior of both technologies. Detailed instrumentation of both systems allowed for a unique low-level performance comparison, considering first- and second-lawbased parameters, which has not been explored in the literature. Overall, the wine cooler was found to be more efficient when operated by the vapor compression system. For an ambient temperature of 25 ◦C and a cabinet temperature of approximately 12 ◦C, the coefficient of performance (COP) and second-law  efficiency of the wine cooler were 0.7 and 3.6% respectively when using the vapor compression system, whereas they were 0.49 and 2.0% respectively when using the magnetocaloric refrigerator system. However, despite the contrast between the internally ideal coefficient of performance of the magnetocaloric wine cooler and the vapor compression wine cooler, significant but realistic design improvements were suggested. These suggestions were evaluated and quantified using a system-level magnetocaloric refrigerator model. The numerical results indicate that with changes in the current pumping system and magnetocaloric materials, an improved version of the magnetocaloric wine cooler could surpass the COP of its original version by 88% and the vapor compression system by 31%.

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Pages: p. 29-39

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Details

  • Original title: Thermodynamic comparison of magnetocaloric and vapor compression wine coolers.
  • Record ID : 30032076
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - Vol. 156
  • Publication date: 2023/12
  • DOI: http://dx.doi.org/10.1016/j.ijrefrig.2023.09.015

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