工作频率及环境温度对往复式磁制冷效果的影响

发布时间：2018-09-07 12:17

【摘要】：为分析不同工作频率和室温环境对往复式室温磁制冷系统制冷温跨的影响,设计了一套以Gd颗粒(粒径:0.3~0.5mm)为磁工质的往复式室温磁制冷系统,并结合活性蓄冷器的换热特点对往复式室温磁制冷系统的制冷温跨进行实验分析。测量了在1.5 T的永磁铁场强下,室温磁制冷机在不同工作频率(0.07、0.12、0.16、0.19、0.22 Hz)及在不同室温工况(14.5、15.9、16.7、18.1℃)蓄冷器冷、热端温度的变化情况。研究表明,当工作频率为0.22 Hz时,系统的最大制冷温跨为12.8℃,并发现当Gd的温度低于其居里温度20℃时,不同室温对有限时间内磁制冷系统的制冷量无影响。
[Abstract]:In order to analyze the effect of different working frequency and ambient temperature on the refrigeration temperature span of reciprocating room temperature magnetic refrigeration system, a reciprocating room temperature magnetic refrigeration system using Gd particles (particle size: 0.3mm 0.5 mm) as magnetic refrigerant was designed. The temperature span of reciprocating room temperature magnetic refrigeration system is analyzed experimentally according to the heat transfer characteristics of active accumulator. The change of the temperature at the cold and hot ends of the room temperature magnetic refrigerator at different operating frequencies (0.07 ~ 0.120.120.16 ~ 0.19 ~ 0.22 Hz) and at different room temperature (14.5g ~ 15.9m ~ 16.718.1 鈩，

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