In this study

to understand the relationship between compressor frequency and the performance of the R410A/R410A cascade refrigeration system

changes in system performance under different frequency of high and low temperature grade compressors are conducted experimentally and analyzed. The results showed that under the same working conditions

a) the intermediate temperature of the system increased by 2.36 ℃

and the difference between the high and low temperature grade compression ratios was reduced by 44.6% when the frequency of a low pressure compressor increased from 50 to 62 Hz; b) the intermediate temperature of the system decreased by 3.7 ℃

and the high and low temperature grade compression ratios increased by 58.5% when the frequency of the high temperature compressor increased from 50 to 62 Hz. The system cascade temperature difference was smaller when the frequency of high temperature compressor changed

and the system coefficient of performance (COP) was higher than that of the system under the frequency change of low-temperature compressor. When the frequency of both the high and low temperature compressors was 53 Hz

the system cascade temperature difference was the least and the system COP was the optimal.