Performance Simulation of the Active Magnetic Regenerator under a Pulsed Magnetic Field

Limei Shen, Xiao Tong, Liang Li, Yiliang Lv, Zeyu Liu and Junlong Xie ()
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Limei Shen: School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Xiao Tong: School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Liang Li: Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
Yiliang Lv: Wuhan National High Magnetic Field Center, Huazhong University of Science and Technology, Wuhan 430074, China
Zeyu Liu: School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
Junlong Xie: School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Energies, 2022, vol. 15, issue 18, 1-13

Abstract: Magnetic refrigeration is acknowledged as a potential substitute for the conventional vapor-compression refrigeration technology, owing to its high efficiency and environmental friendliness. Existing magnetic refrigeration systems are mostly based on permanent magnets, owing to the characteristics of lower magnetic field intensity, non-uniform magnetic field distribution, and lower operating frequency due to the moving parts, which results in a low cooling capacity and small temperature difference. Thus, this study proposes the application of a pulsed magnetic field, with a high intensity and frequency, to a magnetic refrigeration system to achieve a high performance. A verified numerical model is established to investigate the thermodynamic cycle and cooling performance of an active magnetic regenerator (AMR). The transient and steady-state performances of AMR under pulsed and permanent magnetic fields are compared. The results suggest that an AMR can establish a stable temperature difference under a pulsed magnetic field that is 40 times faster than that under a permanent magnetic field. The maximum steady-state cooling capacity under a pulsed magnetic field is 2.5 times that under a permanent magnetic field when the temperature difference is 20 K. Additionally, the effects of pulsed magnetic field waveforms, frequency, and intensity on the performance of AMR are investigated under various utilization factors. These results can guide the improvement of room-temperature magnetic refrigerators.

Keywords: pulsed magnetic field; active magnetic regenerator; thermodynamic cycle; performance investigation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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