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工程科学与技术:2016,48(Z2):200-206
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三种主动式室温磁蓄冷器的数值模拟分析
(1.四川大学材料学院;2.四川大学)
Numerical investigation of three types of active magnetic regenerator for room temperature
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投稿时间:2015-09-10    修订日期:2016-01-14
中文摘要: 为了探究不同工质形貌对磁制冷系统的影响,优化磁蓄冷器结构设计,本实验利用数值模拟对比研究了三种不同结构的磁蓄冷器(圆孔型、矩形孔型和平板型)的制冷功率和制冷系数(COP)。三种模型中,孔隙率为0.3的平板型磁蓄冷器综合制冷效果突出。对平板型磁蓄冷器进一步研究表明,频率为0.5Hz时,板厚为0.3mm的蓄冷器制冷效果最好,在利用率为3.0时,其零温跨制冷功率为200W,COP为3.3左右;在较高频率下(>0.5Hz),工质板越薄,蓄冷器制冷效果越好,而在低频下(<0.5Hz),工质板的厚度对蓄冷器制冷效果影响很小;制冷功率随温跨的增大而减小,温跨为4K和16K时分别对应21W和5W的制冷功率(热端温度为304K时);温跨随热端温度的增大而增大。
Abstract:In order to explore the effect of shape of magnetic refrigerants on magnetic cooling performance, the numerical investigation of three types of magnetic regenerators (the circular channel regenerator, the rectangular channel regenerator and the parallel-plate regenerator) was done in this paper. The regenerator composed of parallel plates with porosity 0.3 performed better than the other regenerators. Under the optimal parallel-plate regenerator obtained above, the regenerator with plate thickness of 0.3mm showed better performance when frequency was 0.5Hz. The zero temperature span cooling capacity was about 200W and the coefficient of performance was about 3.3 when the utilization was 3.0. The regenerator with thinner plates showed better cooling performance when the operating frequency was higher (above 0.5Hz), while the effect of plate thickness wasn’t so obvious below the frequency of 0.5Hz. The cooling capacity was almost inversely proportional to the temperature span, and the cooling capacity of 21W with temperature span of 4K and cooling capacity of 5W with temperature span of 16K were obtained. The temperature span increased with the increase of the hot end temperature.
文章编号:201500940     中图分类号:    文献标志码:
基金项目:项目号:51176050,项目名称:周期性热源作用下室温磁制冷回热器多孔介质能量传输
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引用文本:
薛孝忠,唐永柏.三种主动式室温磁蓄冷器的数值模拟分析[J].工程科学与技术,2016,48(Z2):200-206.
xuexiaozhong,tangyongbai.Numerical investigation of three types of active magnetic regenerator for room temperature[J].Advanced Engineering Sciences,2016,48(Z2):200-206.