Design and Assembling of a Magnetic Circuit for a Thermomagnetic Motor Apparatus

Kaneko, Guilherme; Trevizoli, Paulo V.; Moro, Fernando Rodrigo

doi:10.26678/abcm.encit2018.cit18-0328

Cited by 2 publications

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“…Thus, this work advances on the methods and data previously reported by Kaneko et al [14], presenting the design, assembly procedure, and experimental characterization of a double-C-type MC, composed by NdFeB permanent magnets blocks arranged in a Halbach configuration. The design of the MC was carried out based on 2D and 3D simulations in COMSOL Multiphysics 5.3.…”

Section: Introductionmentioning

confidence: 91%

Design and assembling of a magnetic circuit for a thermomagnetic motor apparatus

Kaneko

Souza

Moro

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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A thermomagnetic motor operates due to magnetization variation of magnetic materials around their transition or Curie temperature. The main components of these motors are the magnetic material (MM) and the magnetic circuit (MC). If the MM presents the transition temperature around room temperature, it may have potential to be used in thermomagnetic motors. Based on the current state-of-the-art, several first-and second-order transition magnetic materials with Curie temperature of 20 °C and above are known, and some of them present high magnetocaloric effect. The MC is responsible to guarantee a high magnetic field region which magnetically interacts with the MM. This way, the main objective of the present paper is the design and assembly of a double-C permanent magnet magnetic circuit, as part of a novel thermomagnetic motor design. Several 2D and 3D simulations were performed using COMSOL Multiphysics V5.3, which is a finite element analysis software for multiphysics simulation. Based on the simulation results, the MC was designed and built. After the construction, simulation results for magnetic field intensity and profiles along the transversal and axial directions were compared with experimental measurements, and a good agreement was verified.

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Section: Introductionmentioning

confidence: 91%

Design and assembling of a magnetic circuit for a thermomagnetic motor apparatus

Kaneko

Souza

Moro

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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“…The magnitude of the MCE depends on material properties, magnetic field variation and temperature, and it is maximum at the Curie temperature of the material [4,5]. Applications of the MCE at near room-temperature are not restricted to cooling applications [6,7]; it can also be applied to the development of thermomagnetic motors [8,9].…”

Section: Introductionmentioning

confidence: 99%

Numerical analysis of the influence of magnetic field waveforms on the performance of active magnetic regenerators

Fortkamp

Lang

Lozano

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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Magnetic cooling is an alternative to vapor compression that does not rely on the use of hazardous substances. The refrigerant is a solid material which reacts to oscillations in magnetic field by changing its temperature (the magnetocaloric effect). In active magnetic regenerators, the magnetocaloric material arranged as a porous medium is subjected to an oscillating fluid flow to allow heat transfer from a cold source to a hot sink in a thermodynamic cooling cycle. Although the literature is abundant with studies on the influence of the fluid flow waveform on magnetic refrigeration devices, the influence of the magnetic field waveform has been much less investigated. In this work, we make use of an active magnetic regenerator numerical model with different mathematically defined waveforms to determine which operating parameters yield the highest values of cooling capacity and coefficient of performance for a specific set of operating conditions. The results show that the best performance is achieved when the magnetic field is kept constant for the same time duration of the fluid flow through the magnetized material, and the transition times between the high and low levels of the magnetic field should be as short as possible.

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Design and Assembling of a Magnetic Circuit for a Thermomagnetic Motor Apparatus

Cited by 2 publications

References 0 publications

Design and assembling of a magnetic circuit for a thermomagnetic motor apparatus

Design and assembling of a magnetic circuit for a thermomagnetic motor apparatus

Numerical analysis of the influence of magnetic field waveforms on the performance of active magnetic regenerators

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