Permanent magnet magnetic refrigerator design and experimental characterization

Tura, A.; Rowe, Andrew

doi:10.1016/j.ijrefrig.2010.12.009

Cited by 156 publications

(69 citation statements)

References 11 publications

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“…Devices with concentric Halbach type magnet assemblies, see e.g. Tura and Rowe (2011), that are rotated to modulate the field are termed rotary while devices where a single Halbach type magnet assembly is moved back and forth, see e.g. Engelbrecht et al(2009) are termed reciprocating devices.…”

Section: Classification Of Devicesmentioning

confidence: 99%

Development and experimental results from a 1 kW prototype AMR

Bahl

Engelbrecht

Eriksen

et al. 2014

International Journal of Refrigeration

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A novel rotary magnetic refrigeration device has been designed and constructed following the concepts recently outlined in Bahl et al. (2011). The magnet and flow system design allow for almost continuous usage of both the magnetic field and the magnetocaloric material in 24 cassettes, each containing an active magnetic regenerator (AMR) bed. As outlined in Pryds et al. (2009) a small scale AMR test device has been used for materials choice and optimising operation, with each component being thoroughly characterised and tested before implementation. The prototype design facilitates easy exchange of the 24 cassettes, allowing the testing of different material amounts and compositions. Operating with 2.8 kg of commercial grade Gd spheres a maximum no-span cooling power of 1010 W and a maximum zero load temperature span of 25.4 K have been achieved. For the purpose of actual operation, simultaneous high span and high performance is required. At a heat load of 200 W a high temperature span of 18.9 K has been obtained, dropping to a span of 13.8 K at the higher heat load value of 400 W.

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Section: Classification Of Devicesmentioning

confidence: 99%

Development and experimental results from a 1 kW prototype AMR

Bahl

Engelbrecht

Eriksen

et al. 2014

International Journal of Refrigeration

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“…As a source of the magnetic field for the magnetic refrigerator, permanent magnets are preferred because they do not require power to generate a magnetic field, so and only mechanical energy is required to move the magnet or the active material [5,6]. A source with magnetic flux density (MFD) of 1 T or 2 T in an acceptable air-gap volume is suitable for use in compact systems that require a few kilowatts of power [6,7]. To obtain this MFD, structure configuration must be optimized.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of 2-T Rotating Halbach Magnet for Magnetic Refrigerator

Ryu¹,

Nahm²,

Jung³

et al. 2017

Journal of Magnetics

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This paper reports simulation and evaluation of the magnetic flux density (MFD) of a rotating Halbach magnet (RHM) composed of a rotating inner Halbach cylinder (HC) and a fixed outer HC. We first chose the dimension of a single HC, then determined the dimensions of an inner and outer HC to get MFD = 2 T. Simulation results were used to guide fabrication of an RHM; its magnetic field in the central axis direction agreed well with simulated values.

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“…A review of these machines was presented by Yu et al (2010) and more recent advances can be found in publications from Tura and Rowe (2011), Engelbrecht et al (2012), Tušek et al (2013) and Jacobs et al (2012). Research is currently focusing on improving the performance of such devices in order to make them competitive with conventional vapour-compression chillers.…”

Section: Introductionmentioning

confidence: 99%

“…This paper focuses on the first steps of the design of this innovative system which is mainly constrained by the volume, weight, the thermal demand and the working temperatures. The latter are key points in the design of a magnetic heat pump (MHP) or magnetic refrigerator (MR) (Tura and Rowe, 2011). Hence, it is essential to size the system properly and predict the effect of variable conditions on the external loops of the regenerator.…”

Section: Introductionmentioning

confidence: 99%

Sizing of a reversible magnetic heat pump for the automotive industry

Torregrosa-Jaime

Corberán

Vasile

et al. 2014

International Journal of Refrigeration

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This paper focuses on the design of an innovative air-conditioning system, namely a magnetocaloric air-conditioner for an electric minibus. An integrated design of the complete system is necessary, as the hot and cold side of the regenerator will work under dynamic conditions which depend on the instantaneous thermal load in the cabin.In order to assist the design of the system, a dynamic model has been developed for the cabin, the hydraulic loops and heat exchangers, and the magnetocaloric unit. This paper presents (i) a description of the dynamic models, (ii) an analysis of the operating conditions of the magnetocaloric unit and (iii) a discussion on the design of the magnetocaloric air-conditioner. The results show that 2 the electric minibus requests 1.60 kW of cooling power over a span of 37 K in cooling mode, and 3.39 kW of heating power over a span of 40K.

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Permanent magnet magnetic refrigerator design and experimental characterization

Cited by 156 publications

References 11 publications

Development and experimental results from a 1 kW prototype AMR

Development and experimental results from a 1 kW prototype AMR

Design and Fabrication of 2-T Rotating Halbach Magnet for Magnetic Refrigerator

Sizing of a reversible magnetic heat pump for the automotive industry

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