Numerical modeling on a reciprocating active magnetic regenerator refrigeration in room temperature

Cryogenics ◽  
2011 ◽  
Vol 51 (6) ◽  
pp. 347-352 ◽  
Author(s):  
Jing Li ◽  
Takenori Numazawa ◽  
Hideki Nakagome ◽  
Koichi Matsumoto
Keyword(s):  
Numerical Modeling ◽  
Room Temperature ◽  
Active Magnetic Regenerator ◽  
Magnetic Regenerator

scholarly journals Numerical study on the thermohydraulic performance of a reciprocating room temperature active magnetic regenerator

2019 ◽  
Vol 128 ◽  
pp. 07001
Author(s):  
Georges El Achkar ◽  
Bin Liu ◽  
Rachid Bennacer
Keyword(s):  
Heat Transfer ◽  
Room Temperature ◽  
Transient Flow ◽  
Numerical Study ◽  
Working Fluid ◽  
Comsol Multiphysics ◽  
Transfer Model ◽  
Two Dimensional ◽  
Active Magnetic Regenerator ◽  
Magnetic Regenerator

In this paper, the thermohydraulic performance of a reciprocating room temperature active magnetic regenerator (AMR), with gadolinium (Gd) particles used as a magnetocaloric material (MCM) and water used as a working fluid, was numerically investigated. A two-dimensional transient flow model was developed using COMSOL Multiphysics, in order to determine the water flow distribution in two AMRs of cross and parallel Gd particles distributions for different water inlet velocities of 0.06 m.s-1, 0.08 m.s-1 , 0.1 m.s-1 and 0.12 m.s-1. The Gd particles have a radius of 1.5 mm and a distance from one another of 0.9 mm. Based on the simulations results of the first model, a two-dimensional transient coupled flow and heat transfer model was then developed using COMSOL Multiphysics, in order to characterise the convective heat transfer in the AMR of cross Gd particles distribution for the same water inlet velocities.

Two-dimensional mathematical model of a reciprocating room-temperature Active Magnetic Regenerator

2008 ◽  
Vol 31 (3) ◽  
pp. 432-443 ◽  
Author(s):  
Thomas Frank Petersen ◽  
Nini Pryds ◽  
Anders Smith ◽  
Jesper Hattel ◽  
Henrik Schmidt ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Room Temperature ◽  
Two Dimensional ◽  
Active Magnetic Regenerator ◽  
Magnetic Regenerator

Modeling of Graded Active Magnetic Regenerator for Room-Temperature, Energy-Efficient Refrigeration

2014 ◽  
Vol 50 (1) ◽  
pp. 1-4 ◽  
Author(s):  
Chih-Ming Hsieh ◽  
Yu-Chuan Su ◽  
Chih-Hao Lee ◽  
Pai-Hsiang Cheng ◽  
Keh-Chyang Leou
Keyword(s):  
Energy Efficient ◽  
Room Temperature ◽  
Active Magnetic Regenerator ◽  
Magnetic Regenerator

Cooling Characteristics of Regenerative Magnetic Refrigeration With Particle-Packed Bed

2011 ◽  
Vol 133 (6) ◽  
Author(s):  
Tsuyoshi Kawanami ◽  
Shigeki Hirano ◽  
Masahiro Ikegawa ◽  
Koji Fumoto
Keyword(s):  
Test Section ◽  
Room Temperature ◽  
Magnetic Circuit ◽  
Packed Bed ◽  
Operating Conditions ◽  
Storage Process ◽  
Magnetic Refrigerator ◽  
Heat Transfer Fluids ◽  
Active Magnetic Regenerator ◽  
Magnetic Regenerator

The aim of our study was to elucidate the fundamental cooling characteristics and to improve the cooling characteristics of a room-temperature magnetic refrigerator operated under an active magnetic regenerator (AMR) cycle. The AMR refrigeration cycle, which includes a thermal storage process and a regeneration process, is used to realize a practical magnetic refrigerator operating near room-temperature. The basic components of the target AMR system are a magnetic circuit, test section, fluid-displacing device, and associated instrumentation. Spherical gadolinium particles are packed in the test section as the magnetic working substance, and air and water are used as heat transfer fluids. The cooling characteristics of the target AMR system under various operating conditions are investigated. The results show that the AMR cycle is very effective in improving the cooling performance of the room-temperature magnetic refrigerator.

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