Feasibility Study of High-Efficiency Cooling of High-Temperature Superconducting Coils by Magnetic Refrigeration

Hirano, Naoki; Nagai, S.; Okazaki, Yodai; Okamura, Tomonori; Onodera, Y.; Mito, T.

doi:10.1109/tasc.2021.3055994

Cited by 7 publications

(6 citation statements)

References 5 publications

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“…(5) (6) In case the winding thickness of magnets is relatively tiny, Ref. [7] has shown that hysteresis losses in the whole magnet conducting AC currents can be calculated from the magnetization losses obtained from Brandt's expression.…”

Section: Ac Loss Calculation Resultsmentioning

confidence: 99%

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Development of Static Magnetic Refrigeration System Using Multiple High-Temperature Superconducting Coils

Hirano

Onodera²,

Mito

et al. 2022

IEEE Trans. Appl. Supercond.

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It is expected to build a sustainable social system that uses "hydrogen" as a fuel to generate electricity without emitting CO2. To realize this, technology for storing a large amount of hydrogen is indispensable, and storage as liquid hydrogen is ideal. However, the efficiency of the cooling device in the temperature range around 20 K required for long-term storage with liquid hydrogen is low, and the equipment is huge and expensive, so it has not been established as a widely used technology. Magnetic refrigeration is expected to be a highly efficient refrigerator in the temperature range of around 20 K because it can realize an ideal refrigeration cycle. However, in magnetic refrigeration, it is necessary to give a magnetic field change to the magneto caloric material (MCM). Further, in order to perform cooling with a large capacity and extremely low temperature by magnetic refrigeration, the magnetic field strength of a permanent magnet is insufficient, and it is indispensable to use a superconducting coil capable of generating a strong magnetic field with low power consumption. This study aims to develop a static magnetic refrigeration system using multiple high-temperature superconducting coils. By utilizing the energy storage characteristics of the superconducting coil, we are considering a magnetic refrigeration system that can repeatedly generate magnetic field changes to save energy without the need for large amounts of energy to be taken in and out of the outside. We report on the technical feasibility of a static magnetic refrigeration system using HTS coils. The power consumption including the AC loss of two superconducting coils, which is the basic configuration of the static magnetic refrigeration system, is calculated, and the efficiency is estimated as a ratio to the assumed refrigeration capacity of the MCM.

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Section: Ac Loss Calculation Resultsmentioning

confidence: 99%

“…We are also studying a method using a magnetic shield to change the magnetic field in MCM without moving the magnetic field source or MCM [5] [6]. In this study, SMRS is defined as a configuration that changes the magnetic field in MCM by changing the current of the superconducting magnet.…”

Section: A Features Of Smrsmentioning

confidence: 99%

Development of Static Magnetic Refrigeration System Using Multiple High-Temperature Superconducting Coils

Hirano

Onodera²,

Mito

et al. 2022

IEEE Trans. Appl. Supercond.

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“…These endeavors proved that MHD power generation is viable, but also is economically non-competitive and technologically challenging. However, with advancements in related technologies, such as superconducting electromagnets [ [37] , [38] , [39] , [40] , [41] ], and the alignment of MHD power generation with the elevated-temperature oxygen-fired power plants coupled with carbon capture for the CO 2 -enriched combustion products [ [42] , [43] , [44] , [45] , [46] , [47] , [48] , [49] , [50] , [51] , [52] , [53] , [54] ], this concept was revisited recently with a potential for realization or at least conducting revised feasibility studies [ 55 , 56 ].…”

Section: Introductionmentioning

confidence: 99%

Estimated electric conductivities of thermal plasma for air-fuel combustion and oxy-fuel combustion with potassium or cesium seeding

Marzouk

2024

Heliyon

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“…The material has been widely employed in conventional electromagnetic devices, such as sensors and actuators, transformers, electrical motors, and magnetoelectric inductive elements. Fe-Ni-based permalloys modified with additives are also promising candidate materials for multiple novel applications, such as wind turbines, all-electric vehicles, rapid powder-conversion electronics, electrocatalysts, and magnetic refrigeration [1,2,3,4].…”

Section: Introductionmentioning

confidence: 99%

Tailoring magnetic hysteresis of Fe-Ni permalloy by additive manufacturing: Multiphysics-multiscale simulations of process-property relationships

Yang¹,

Oyedeji²,

Zhou³

et al. 2023

Preprint

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Designing the microstructure of Fe-Ni permalloy by additive manufacturing (AM) opens new avenues to tailor the materials' magnetic properties. Yet, AM-produced parts suffer from spatially inhomogeneous thermalmechanical and magnetic responses, which are less investigated in terms of process simulation and modeling schemes. Here we present a powder-resolved multiphysics-multiscale simulation scheme for describing magnetic hysteresis in materials produced via AM. The underlying physical processes are explicitly considered, including the coupled thermal-structural evolution, chemical order-disorder transitions, and associated thermo-elasto-plastic behaviors. The residual stress is identified as the key thread in connecting the physical processes and in-process phenomena across scales. By employing this scheme, we investigate the dependence of the fusion zone size, the residual stress and plastic strain, and the magnetic hysteresis of AM-produced Fe 21.5 Ni 78.5 permalloy on beam power and scan speed. Simulation results also suggest a phenomenological relation between magnetic coercivity and average residual stress, which can guide the magnetic hysteresis design of soft magnetic materials by choosing appropriate AM-process parameters.

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Feasibility Study of High-Efficiency Cooling of High-Temperature Superconducting Coils by Magnetic Refrigeration

Cited by 7 publications

References 5 publications

Development of Static Magnetic Refrigeration System Using Multiple High-Temperature Superconducting Coils

Development of Static Magnetic Refrigeration System Using Multiple High-Temperature Superconducting Coils

Estimated electric conductivities of thermal plasma for air-fuel combustion and oxy-fuel combustion with potassium or cesium seeding

Tailoring magnetic hysteresis of Fe-Ni permalloy by additive manufacturing: Multiphysics-multiscale simulations of process-property relationships

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