Abstract
Optimized operation of compressor stations is of great importance for energy saving of Sichuan-East transmission pipeline at high flow rate. However, it is difficult to build an accurate mathematical model to describe the performance curves of centrifugal compressor due to the wide range of rotary speed. The achievements of this thesis are shown as follows. Firstly, the mathematic models for performance curves of the Euramerican centrifugal compressors were established. The optimized regression coefficients were solved rapidly and accurately by Zhan Chong-xi method. Secondly, the compressor ratio, polytropic efficiency, shaft power, outlet pressure, polytropic head and outlet temperature of centrifugal compressors at different flow rates and rotating speeds were calculated accurately. These results provides excellent modeling methods and reliable mathematics models of operating and managing compressor of Sichuan-East gas transmission pipeline. It was found that the lowest correlative index of six optimized models was 0.9772, and the maximum error is 4.2869%.
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