Theoretical and Numerical Investigations on Refrigeration Performance of Irreversible Regenerative Magnetic Brayton Cycle

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Theoretical and Numerical Investigations on Refrigeration Performance of Irreversible Regenerative Magnetic Brayton Cycle

更新时间：2025-07-09

- Theoretical and Numerical Investigations on Refrigeration Performance of Irreversible Regenerative Magnetic Brayton Cycle
- Vol. 44, Issue 1, Pages: 56-60(2010)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： TB61;TB66
- Online First：10 January 2010，
  
  Published：2010
- 稿件说明：
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Theoretical and Numerical Investigations on Refrigeration Performance of Irreversible Regenerative Magnetic Brayton Cycle[J]. 2010, 44(1): 56-60.
DOI：

Theoretical and Numerical Investigations on Refrigeration Performance of Irreversible Regenerative Magnetic Brayton Cycle[J]. 2010, 44(1): 56-60. DOI：

摘要

基于统计理论推导的铁磁材料的磁热参数

建立了不可逆回热式磁Brayton循环数学模型.对于顺磁材料作工质的情形

获得了循环放热量Q

、制冷量Q

、回热量及性能系数δ

COP

的表达式的解析解.以铁磁材料钆作工质为例

数值研究了循环室温区的制冷性能

考察了归一化温度α、回热不平衡量Q

及磁化过程不可逆度η对循环有效制冷量Q

eff

及δ

COP

的影响

并获得了不同外部磁场H

条件下循环最大温跨δ

max

.数值结果显示:Q

eff

随α的增加而增加; 当α≥0.6或Q

≥0时

循环均能获得良好的制冷性能; 磁化过程的不可逆因素会使得δ

COP

迅速下降.

Abstract

On the basis of magneto-thermo parameters of ferromagnetic material deduced by the statistic theory

a mathematical model for the irreversible regenerative magnetic Brayton cycle was established. For the case of paramagnetic material

the analytic solution of heat release Q

refrigeration capacity Q

regenerative heat

and coefficient of performance δ

COP

were achieved. The numerical study on the refrigeration performance in room-temperature regions of the cycle was conducted for ferromagnetic material

Gadolinium. The influence of dimensionless temperature α

imbalance regenerative heat Q

and irreversible degree η on effective refrigeration capacity Q

eff

and δ

COP

was exami

ned

and maximum temperature span δ

max

under different external magnetic field H

of the cycle was obtained. The numerical results show that Q

eff

increases with the increase of α

and the cycle has high refrigeration performance when α≥0.6 or Q

≥0. In addition

COP

of the cycle decreases rapidly because of irreversible factors in magnetizing processes.

关键词

Keywords

references

张艳,俞炳丰, 高强,等. 用Langevin理论推导的磁热参数对回热式室温磁制冷循环性能的研究 [J]. 西安交通大学学报, 2005, 39(3): 247-251.

ZHANG Yan, YU Bingfeng, GAO Qiang, et al. Research on performance of regenerative room temperature magnetic refrigeration cycle through magnetocaloric parameter deduced by Langevin theory [J]. Journal of Xi'an Jiaotong University, 2005, 39(3): 247-251.

YU B F, ZHANG Y, GAO Q, et al. Research on performance of regenerative room temperature magnetic refrigeration cycle[J]. International Journal of Refrigeration, 2006, 29(8): 1348-1357.

XIA Z R, YE X M, LIN G X, et al. Optimization of the performance characteristics in an irreversible magnetic Ericsson refrigeration cycle [J]. Physica: B, 2006, 381(1/2):246-255.

YE X M, LIN G X, CHEN J C, et al. Parametric optimization of an irreversible magnetic Ericsson refrigerator with finite heat reservoirs [J]. Physica: B, 2007, 391(2): 350-356.

YANG Y L, CHEN J C, HE J Z, et al. Parametric optimum analysis of an irreversible regenerative magnetic Brayton refrigeration cycle [J]. Physica: B, 2005,364(1/4):33-42.

HE J Z, WU X, OUYANG W P. Performance optimization of an irreversible quantum spin refrigeration cycle [J]. International Journal of Thermal Sciences, 2006, 45(9): 938-944.

HE J Z, WU X, DENG X F. Performance characteristics of an irreversible magnetic Brayton refrigeration cycle [J]. International Journal of Refrigeration, 2008, 31(1): 138-144.

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