摘要
通过改变GM制冷机活塞的运行频率,实验测定GM制冷机的性能,通过实验结果分析GM制冷机冷头运行频率对其性能的影响。实验结果表明,在不改变制冷机结构参数的情况下,制冷机存在一个最佳运行频率0.84 Hz,即冷头电机运行转速为42 r/min。制冷机冷头型号不变,压缩机由6 k W换成3 k W压缩机进行驱动时,通过降低制冷机冷头运行频率发现:冷头电机转速由60 r/min转换成42 r/min时,在二级达到4.2 K时,制冷机可获得0.5 W的冷量,其效率与6 k W压缩机驱动时一致。
The performance of GM refrigerator by changing the operating frequency of GM refrigerator piston was measured and the impact of the GM refrigerator operating frequency on GM refrigerator＇s performance was analyzed. The results show that without changing the structural parameters of the refrigerator,there is an optimum operating frequency 0. 84 Hz of the refrigerator,which the cold head motor speed is 42 r / min. Without changing the refrigerator,the compressor which was 6 k W,replaced by one of 3 k W,when reducing the operating frequency of the refrigerator,the results show that when refrigerator motor speed changes from 60 r / min to 42 r / min,and the second stage reaches 4. 2 K,the 0. 5 W cooling capacity is available,at the same time,the efficiency is consistent with 6 k W compressor＇s.
出处
《低温工程》
CAS
CSCD
北大核心
2015年第5期45-48,共4页
Cryogenics
关键词
GM制冷机
频率
温度
测量
GM refrigerator
frequency
temperature
measure
