Review on the developments of active magnetic regenerator refrigerators – Evaluated by performance

Kamran, Muhammad; Ahmad, Hafiz Ozair; Wang, Huasheng

doi:10.1016/j.rser.2020.110247

Cited by 48 publications

(10 citation statements)

References 88 publications

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“…Two recent reviews on active magnetic regenerators describe the physics of the MCM interaction with a magnetic field [11] and a summary of the coefficient of performance (COP) for AMR refrigerators ranging from 0.5 to 11.2-the latter being almost a 400% increase compared to typical refrigerators [12]. During an AMR cycle, the MCE is utilized by repeatedly raising and lowering the temperature of the MCM by changing the external magnetic field to create a heat-pumping effect [2,12]. The MCM is usually packed in a flow conduit called the regenerator (e.g., tube).…”

Section: Introductionmentioning

confidence: 99%

Compatibility of LaFe13−x−yMnxSiyH1.6 and Eutectic Liquid GaInSn Alloy

Brechtl,

Rendall,

Zhang

et al. 2024

Magnetochemistry

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The heat transfer rate of magnetocaloric regenerators is a topic of extensive research and the cyclability of these regenerators is critical to the operation of systems with a high coefficient of performance (e.g., potentially >22, significantly higher than typical vapor compression cooling technologies). To enable a high operating frequency that will result in a high specific cooling power, the heat transfer fluid should have high thermal conductivity and lower specific heat, i.e., higher thermal diffusivity. Eutectic metal alloys possess these qualities, such as gallium–indium–tin (Galinstan), whose thermal diffusivity has been found to be approximately an order of magnitude higher than water. For this study, the effects of eutectic liquid Galinstan exposure on the phase stability of LaFe13−x−yMnxSiyH1.6 magnetocaloric powders in an active magnetic regenerator device were investigated. The powders were characterized before and after exposure to Galinstan using X-ray diffraction, in which the phases were determined using the Rietveld refinement technique and X-ray fluorescence. It was found that after Galinstan exposure, hydrogen containing phases were present in the powder, suggesting that the hydrogen was lost from the magnetocaloric phase. The magnetocaloric phase degradation indicates that the powder was incompatible with the Galinstan metal in an environment with moisture.

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Section: Introductionmentioning

confidence: 99%

Compatibility of LaFe13−x−yMnxSiyH1.6 and Eutectic Liquid GaInSn Alloy

Brechtl,

Rendall,

Zhang

et al. 2024

Magnetochemistry

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“…La(Fe,Si) 13 represents a promising magnetocaloric material owing to its low material cost, better adiabatic temperature change and isothermal entropy change, and the possibility to tune its Curie temperature depending on the applications. − Preparation of the La(Fe,Si) 13 alloy family with a single NaZn 13 phase is challenging. , Certain manufacturing processes require the addition of excess La, which is subsequently removed. , Depending on the degree of removal, it results in an alloy with insufficient or excess La, leading to, among others, the formation of the α-Fe phase. − It also affects the magnetic entropy change, either favorably or unfavorably. − Improvements are needed in the mechanical stability of the La(Fe,Si) 13 alloy family, which is the focus of several studies. ,− …”

Section: Introductionmentioning

confidence: 99%

Unlocking the Potential of Magnetic Refrigeration: Investigating the Compatibility of the Ga-Based Liquid Metal with a La(Fe,Mn,Si)₁₃H_z Magnetocaloric Material for Enhanced Long-Term Stability

Rajamani,

Toprak,

Zhang

et al. 2023

ACS Omega

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Magnetic refrigeration (MR) is a cutting-edge technology that promises high energy efficiency and eco-friendliness, making it an exciting alternative to traditional refrigeration systems. However, the main challenge to its widespread adoption is cost competitiveness. In this context, the use of liquid metals as heat transfer liquids in the MR has been proposed as a game-changing solution. Unfortunately, the toxicity and flammability of these liquid metals have raised serious concerns, limiting their practical use. In this study, we investigate the compatibility of a nontoxic and nonflammable GaInSn-based liquid metal with a magnetocaloric material, La(Fe,Mn,Si) 13 H z , over a 1.5 year period. Our findings reveal nearly a 14% reduction in specific cooling energy and peak-specific isothermal magnetic entropy change for the considered magnetocaloric material. Our study provides valuable insights into the long-term stability of magnetocaloric materials and their compatibility with liquid metals, facilitating the development of more cost-effective and sustainable MR systems.

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“…Compared with traditional compressed gas refrigeration, magnetic refrigeration technology has several promising advantages of environmental friendliness, high energy efficiency and reliable operation, and it has been applied on a small scale in medical instruments and refrigerated cabinets [1][2][3][4][5][6]. Magnetic refrigeration technology is based on the magnetocaloric effect (MCE) of magnetic refrigerants, which is defined as the heat absorption and release phenomenon mainly caused by the magnetic entropy change and lattice entropy change of magnetic refrigerants in the various magnetic field [7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…As a typical second-order magnetic phase transition material, the metal Gd is usually processed into regular spherical particles in most magnetic refrigerators, and the spherical shape can improve the heat exchange between Gd and the heat exchange medium (eg. water, water+ ethanol) [1]. As we all known, the Curie temperature of Gd is around 294 K, and it can not meet the refrigeration requirement below room temperature.…”

Section: Introductionmentioning

confidence: 99%

Magnetocaloric effect over a temperature span in (Gd_xTb_1-x)₃Al₂ compounds

Lei,

Xiang,

Pengyu

et al. 2023

J. Phys.: Conf. Ser.

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As an environmentally friendly, more efficient and operation-reliable technology, magnetic refrigeration is promised to replace traditional gas compression refrigeration. In our study, we studied the influence on magnetism and magnetocaloric effect of (Gd x Tb1-x )3Al2 (x=0, 0.2, 0.4, 0.6, 0.8, 1) systematically. These results indicated that the increase of Gd concentration increased the lattice constants due to larger atomic radius of Gd atom. Simultaneously, the Curie temperature is dependent on magnetic interaction between Gd atom and Tb atom, and reduced from 279 K to 190 K for x=1 to x=0. Arrott plots indicated that (Gd x Tb1-x )3Al2 compounds showed the characteristics of second-order magnetic phase transition. Under a magnetic field of 0-2 T, the maximum isothermal magnetic entropy (-ΔSM)max of (Gd x Tb1-x )3Al2 (x=0, 0.2, 0.4, 0.6, 0.8, 1) compounds are 4.13, 3.79, 3.91, 4.08, 3.96 and 3.98 J/(kg K), respectively. Moreover, refrigeration capacity RC of (Gd x Tb1-x )3Al2 are 59.7, 69.0, 77.6, 65.0, 76.1 and 75.6 J/kg, respective. Adjustable Curie temperature, lower magnetic and thermal hysteresis, (-ΔSM) and RC suggested that, (Gd x Tb1-x )3Al2 compounds can be used as candidates for magnetic refrigeration.

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Review on the developments of active magnetic regenerator refrigerators – Evaluated by performance

Cited by 48 publications

References 88 publications

Compatibility of LaFe13−x−yMnxSiyH1.6 and Eutectic Liquid GaInSn Alloy

Compatibility of LaFe13−x−yMnxSiyH1.6 and Eutectic Liquid GaInSn Alloy

Unlocking the Potential of Magnetic Refrigeration: Investigating the Compatibility of the Ga-Based Liquid Metal with a La(Fe,Mn,Si)₁₃H_z Magnetocaloric Material for Enhanced Long-Term Stability

Magnetocaloric effect over a temperature span in (Gd_xTb_1-x)₃Al₂ compounds

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Review on the developments of active magnetic regenerator refrigerators – Evaluated by performance

Cited by 48 publications

References 88 publications

Compatibility of LaFe13−x−yMnxSiyH1.6 and Eutectic Liquid GaInSn Alloy

Compatibility of LaFe13−x−yMnxSiyH1.6 and Eutectic Liquid GaInSn Alloy

Unlocking the Potential of Magnetic Refrigeration: Investigating the Compatibility of the Ga-Based Liquid Metal with a La(Fe,Mn,Si)13Hz Magnetocaloric Material for Enhanced Long-Term Stability

Magnetocaloric effect over a temperature span in (Gd x Tb1-x )3Al2 compounds

Contact Info

Product

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Unlocking the Potential of Magnetic Refrigeration: Investigating the Compatibility of the Ga-Based Liquid Metal with a La(Fe,Mn,Si)₁₃H_z Magnetocaloric Material for Enhanced Long-Term Stability

Magnetocaloric effect over a temperature span in (Gd_xTb_1-x)₃Al₂ compounds