Performance characteristics of a magnetic Ericsson refrigeration cycle using GdxDy1−x as the working substance

Based on the experimental isothermal entropy change of the magnetic materials GdxDy1−x, the thermodynamic performance of a regeneration Ericsson refrigeration cycle is evaluated and analyzed. The effects of non-perfect regeneration on the cyclic performance are highlighted. For a room temperature hot reservoir, the cooling quantity, non-perfect regeneration heat quantity, and net cooling quantity of the established regeneration Ericsson refrigeration cycle are calculated as a function of the cold reservoir temperature. Furthermore, for several typical compositions x of the GdxDy1−x alloys, the values of the cooling quantity, non-perfect regeneration heat quantity, work input, net cooling quantity, and coefficient of performance (COP) are listed for given temperatures of the cold reservoir. The cyclic performance of the GdxDy1−x alloys with different composition x is compared and some significant analyses are provided. - Highlights: • We examine the thermodynamics properties of the magnetocaloric alloys GdxDy1−x. • We model a magnetic Ericsson cycle with regeneration process. • Calculations are based on experimental isothermal entropies change. • A cold reservoir temperature limit was found depending on 'x' composition value and operating conditions. • Lowest 'x' composition values have larger COP but lower net cooling quantities