A method for judging state stability in compressor performance evaluation
To accurately and efficiently obtain the performance parameters of the compressor,the required stability time and state stability characteristics of each performance parameter during the test process were analyzed with multiple compression components taken as the objects.The total outlet temperature of the compressor was used as the judgment parameter,and a method for judging the stability of the compressor test state was studied.The research results show that the temperature rise efficiency of the compressor requires the longest stability time and largest fluctuation amplitude compared with other performance parameters,and may be accompanied by low-frequency pulsation;the fluctuation amplitude of the average total outlet temperature gradually decreases with the increase of the average sampling time.When the sampling frequency is 5 Hz,it is recommended that the average sampling time not be less than 1 s;the stable state of the compressor can be judged by the linear fitting slope of the total outlet temperature with the stable time.It is recommended that linear fitting be performed on the average total outlet temperature within 30 s,and the fitting slope is within±0.002 for continuous 15 s,which is used as the basis for judging the stability of the test state.
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