Design and optimization of regenerators of a rotary magnetic refrigeration device using a detailed simulation model

In this work a comprehensive simulation of a magnetic refrigeration device is presented, validated, and used for redesigning the regenerators of an existing prototype. The redesigning process includes choosing the magnetocaloric materials and number of layers and optimizing for particle size, flow, and operation frequency. The simulation consists of the model of the magnetic field, parasitic heat transfer and active regeneration. The model of the magnetic field and parasitic heat transfer are embedded in the 1D model of the active regeneration cycle. The detailed model of the magnetic field, taking the effect of presence of the magnetocaloric materials into account, is described and validated separately against measured magnetic field. An innovative method for including the parasitic heat transfer in the active regeneration model without compromising the accuracy is used. The influence of the properties of the binding agent on the performance of the bonded beds as regenerators are also investigated.