Numerical simulation of a low temperature hybrid refrigerator combining GM gas expansion refrigeration with magnetic refrigeration

Cryogenics ◽  
2021 ◽  
Vol 113 ◽  
pp. 103235
Author(s):  
Ke Li ◽  
Xiaohui Guo ◽  
Wei Dai ◽  
Franklin Miller ◽  
Xinqiang Gao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Low Temperature ◽  
Magnetic Refrigeration ◽  
Gas Expansion

Large magnetic entropy change at cryogenic temperature in rare earth HoN nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75562-75569 ◽  
Author(s):  
K. P. Shinde ◽  
S. H. Jang ◽  
M. Ranot ◽  
B. B. Sinha ◽  
J. W. Kim ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Cryogenic Temperature ◽  
Magnetic Entropy Change ◽  
Entropy Change ◽  
Environmental Problems ◽  
Magnetic Refrigeration ◽  
Magnetic Entropy ◽  
Alternative Technology

The most extensive cooling techniques based on gases have faced environmental problems. The magnetic refrigeration is an alternative technology based on magnetocaloric effect. HoN nanoparticles are good refrigerant material at low temperature.

A New Low-Temperature Gas Expansion Cycle

1960 ◽  
pp. 368-372 ◽  
Author(s):  
W. E. Gifford ◽  
H. O. McMahon
Keyword(s):  
Low Temperature ◽  
Gas Expansion

scholarly journals Numerical Simulation of the Effects on Low Temperature Drainage from LNG on the Ocean Water Environment

2017 ◽  
Vol 05 (03) ◽  
pp. 71-80
Author(s):  
Mingyuan Sun ◽  
Yi Zhang ◽  
Longxi Han ◽  
Bo Chen ◽  
Tiantian Liu
Keyword(s):  
Numerical Simulation ◽  
Low Temperature ◽  
Water Environment ◽  
Ocean Water

scholarly journals CPFD simulation on particle behaviour in an entrained-flow gasifier

Clean Energy ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 75-84
Author(s):  
Yongshi Liang ◽  
Cliff Y Guo ◽  
Xianglong Zhao ◽  
Qiang Qin ◽  
Yi Cheng ◽  
...  
Keyword(s):  
Low Temperature ◽  
Residence Time ◽  
Temperature Region ◽  
Recirculation Zone ◽  
Dynamics Simulation ◽  
Entrained Flow ◽  
Fast Reactions ◽  
Entrained Flow Gasifier ◽  
Gas Expansion ◽  
Entrained Flow Gasification

Abstract A computational particle fluid dynamics simulation model for entrained-flow gasification was established in this study. The simulation results agree with the experimental data. The detailed particle information and residence-time distribution were obtained by injecting particle tracers in the simulation. The results show that the particles in the gasifier can be classified into three flowing zones, i.e. a fast-flowing zone, a recirculation zone and a spreading zone. The criterion for this classification was also provided. The rapid gas expansion caused by the fast reactions plays a significant role in forming the particle stream into these three zones. It accelerates the particles in the centre of the gasifier while pushing the particles near the expansion edge into the gas recirculation. Also, the concentrated oxygen distribution in the gasifier results in the formation of high- and low-temperature regions. The particles in the fast-flowing zone flow directly through the high-temperature region and most of these particles in this zone were fully reacted with a short residence time. Since particles in the recirculation zone are in a relatively low-temperature region, most of these particles are not fully gasified, although with a long residence time. The rest of particles in the spreading zone show moderate properties between the above two zones.

Low-Temperature Oxidation Kinetic Parameters for In-Situ Combustion Numerical Simulation

1987 ◽  
Vol 2 (04) ◽  
pp. 573-582 ◽  
Author(s):  
K.O. Adegbesan ◽  
J.K. Donnelly ◽  
R.G. Moore ◽  
D.W. Bennion
Keyword(s):  
Numerical Simulation ◽  
Low Temperature ◽  
Kinetic Parameters ◽  
Oxidation Kinetic ◽  
Low Temperature Oxidation ◽  
In Situ Combustion ◽  
Temperature Oxidation

scholarly journals Magnetocaloric effect and thermal conductivity of Gd(OH)3 and Gd2O(OH)4(H2O)2

2015 ◽  
Vol 51 (34) ◽  
pp. 7317-7320 ◽  
Author(s):  
Yan Yang ◽  
Qian-Chong Zhang ◽  
Yin-Yin Pan ◽  
La-Sheng Long ◽  
Lan-Sun Zheng
Keyword(s):  
Thermal Conductivity ◽  
Low Temperature ◽  
Magnetocaloric Effect ◽  
Magnetic Refrigeration ◽  
Promising Candidate

The magnetocaloric effect and thermal conductivity of two gadolinium hydroxides, Gd(OH)3 (1) and Gd2O(OH)4(H2O)2 (2), were investigated, respectively, revealing that 1 is the most promising candidate for an ultra-low temperature magnetic refrigeration material.

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