推移活塞脉管制冷机的性能测试

Performance of a displacer pulse tube refrigerator

采用了实验研究的方法,在宽广的温度范围内测试了推移活塞脉管制冷机在不同运行频率和不同充气压力下的工作性能。实验结果表明,在最佳运行频率附近,频率的变化对制冷机制冷效率的影响并不显著,最佳频率在实验范围内基本不随制冷温度而改变。在同一个工作频率下,存在一个最佳的充气压力使得制冷机的工作性能最佳。实验结果也表明了压缩机的功率因数并不显著影响制冷机工作性能。

The performance of a refrigerator under different frequencies and charge pressures was meas- ured in a wide temperature range. The results shows that there was no significant change in frequency with the variation of the efficiency near the optimum frequency and the optimum frequency almost remained un- changed in the measured temperature range. In addition, the results also point out that the power factor of the compressor has little effect on the performance of the machine.