Review of magnetic refrigeration system as alternative to conventional refrigeration system

Abstract

Abstract. The refrigeration system is one of the most important systems in industry. Developers are constantly seeking for how to avoid the damage to the environment. Magnetic refrigeration is an emerging, environment-friendly technology based on a magnetic solid that acts as a refrigerant by magneto-caloric effect (MCE). In the case of ferromagnetic materials, MCE warms as the magnetic moments of the atom are aligned by the application of a magnetic field. There are two types of magnetic phase changes that may occur at the Curie point: first order magnetic transition (FOMT) and second order magnetic transition (SOMT). The reference cycle for magnetic refrigeration is AMR (Active Magnetic Regenerative cycle), where the magnetic material matrix works both as a refrigerating medium and as a heat regenerating medium, while the fluid flowing in the porous matrix works as a heat transfer medium. Regeneration can be accomplished by blowing a heat transfer fluid in a reciprocating fashion through the regenerator made of magnetocaloric material that is alternately magnetized and demagnetized. Many magnetic refrigeration prototypes with different designs and software models have been built in different parts of the world. In this paper, the authors try to shed light on the magnetic refrigeration and show its effectiveness compared with conventional refrigeration methods.

System architectures for thermal management of hybrid-electric aircraft - FutPrInt50

“…Moreover, these numbers were collected on current prototypes and/or models and they do not take into account possible future improvements. The data shown are derived mainly from references [7], [8], [9], [10], [11], [12], [13], [14] and [15].…”

Air conditioning systems for aeronautical applications: a review

“…It is an environmentally-friendly technology with high thermodynamic efficiency and silent design (no vibration), that offers cost savings. However, a few problems remain unsolved, for instance, how to obtain permanent magnets that can produce a strong magnetic field and problems associated with magnetic and thermal hysteresis (68) . Further studies in this field, with a focus on aeronautical applications, should also be encouraged.…”

Vickers micro-hardness variation during change in concentration of constituent elements in Ni50–xFexMn30Sn20–yIny, Heusler alloys

“…The ozone layer has suffered greatly due to the many years exposure to these substances. Because of this, we have a great responsibility to create refrigeration systems that are free of chemicals and harmless to the environment [3]. One of the alternatives to existing refrigeration technology is magnetic refrigeration.…”