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Solutions to obstacles in the commercialization of room-temperature magnetic refrigeration
Renewable and Sustainable Energy Reviews, 2021Abstract Most existing room temperature magnetic refrigeration (MR) prototypes are based on the concept of an active magnetic regenerator (AMR). However, for these MR prototypes, three obstacles, i.e. theoretical limit of the MR thermodynamic cycle, low operating frequency, and large irreversible loss during heat regeneration, limit the enhancement ...
Yaokang Zhang +2 more
exaly +2 more sources
Analysis of room temperature magnetic regenerative refrigeration
International Journal of Refrigeration, 2005Results of a room temperature magnetic refrigeration test bed and an analysis using a computational model are presented. A detailed demonstration of the four sequential processes in the transient magnetocaloric regeneration process of a magnetic material is presented.
Lawrence H Bennett, E Della Torre
exaly +2 more sources
The research of room temperature magnetic refrigeration technology
2005 International Conference on Electrical Machines and Systems, 2005The technology of room temperature magnetic refrigeration was researched and discussed in this paper. On the one hand, this paper introduced and analyzed the theory of the magnetic refrigeration and the value in study. On the other hand, a set of new device was designed through analyzing and investigating the technology of domestic situation.
null Zhang Zheng +2 more
exaly +2 more sources
Room-temperature magnetic refrigerator using permanent magnets
IEEE Transactions on Magnetics, 2000A magnetic refrigerator device based on adiabatic magnetic refrigeration is described. The magnetic material is cyclically magnetized and demagnetized by permanent magnets in an adiabatic process. A temperature difference of 1.6 K between the hot and cold regions was obtained under a low magnetic field (0.3 T). Gadolinium was the magnetic material used
X. Bohigas +4 more
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Transition-metal-based magnetic refrigerants for room-temperature applications
Nature, 2002Magnetic refrigeration techniques based on the magnetocaloric effect (MCE) have recently been demonstrated as a promising alternative to conventional vapour-cycle refrigeration. In a material displaying the MCE, the alignment of randomly oriented magnetic moments by an external magnetic field results in heating.
Tegus, O. +3 more
openaire +4 more sources
Development of permanent magnetic refrigerator at room temperature
Rare Metals, 2006A reciprocating magnetic refrigerator was developed based on the active magnetic regeneration technology. Rare earth metal Gd and intermetallic compound LaFe11.2Coo.7Si1.1 were used as the magnetic operating materials in the machine. The particles of the magnetic operating materials, with diameter of 0.5 – 2 mm and total mass of 950 g, were mounted in ...
J HUANG +6 more
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Performance of a room-temperature rotary magnetic refrigerator
International Journal of Refrigeration, 2006We have designed and operated a rotating-magnet type AMR (active magnetic regeneration) refrigerator that uses water as a heat transfer fluid. Four kinds of gadolinium-based alloy are used as magnetic materials. A magnetic field of 0.77 T is applied by neodymium permanent magnets.
T. Okamura +3 more
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Classification proposal for room temperature magnetic refrigerators
International Journal of Refrigeration, 2012Abstract Magnetic refrigeration promises to be a breakthrough technology in the field of refrigeration at room temperature. Several magnetic refrigerator prototypes have been developed by research groups, with different embodiments and process thermodynamics.
SCARPA, FEDERICO +2 more
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A numerical model of an Active Magnetic Regenerator for refrigeration at room temperature
International Journal of Environmental Technology and Management, 2007In this paper, a numerical model of an Active Magnetic Regenerator (AMR) for refrigeration at room temperature has been evaluated. The model is based on the equation of state of a homogeneous ferromagnetic with reference to the gadolinium used as magnetocaloric substance.
APREA, Ciro +2 more
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Room temperature active regenerative magnetic refrigeration: Magnetic nanocomposites
Journal of Applied Physics, 2003Nanocomposites have several advantages as a refrigerant for 100–300 K applications compared to the other common methods of assembling a magnetic refrigeration bed, such as a layered thermal bed, or mixing of different magnetic materials. This article discusses the thermodynamics and heat transfer analysis of an ideal and real active magnetic ...
Farhad Shir +4 more
openaire +1 more source