Selection of System Characteristic of Turbo-Compressor Package Based on Efficiency Analysis according to Full-Scale Test Results. Part ІV. Analysis of System Characteristics of Turbo-Compressor Package GPA-C-6,3А /56-1,45 and Possibility of Optimization
Keywords:
package, compressor, exergy analysis, system characteristics, package exergy efficiencyAbstract
This paper presents the obtained system characteristics of the package GPA-C-6,3А /56-1,45 using functional and functional-exergy approaches as well as design and experimental data on efficiency of centrifugal compressor (CC) and gas turbine (GT). When functional approach served the package efficiency was 25,8%, and when functional-exergy approach served it was 26,5%. At this in both cases there is a difference between the optimum condition of the package operation at which the max efficiency of the package is reached, and design condition of centrifugal compressor operation. The specified differences are determined by using impellers with blades exit angle 320 and vaned diffusers in centrifugal compressor stages. The analytical dependence to determine TCA fuel efficiency factor is presented. Coincidence of optimum of characteristics of the package exergy efficiency and fuel consumption factor of centrifugal compressor weight output is determined. In this case the package max exergy efficiency meets min value of the fuel consumption value. Using experimental data the design model verification for thermodynamic analysis of the operating process of the skid turbo-compressor package of linear compressor stations having single casing centrifugal compressor is performed. It is shown that mismatching of max values of the package efficiency by weight output for TCA system characteristics is 2,0% (relative one), that provides the required accuracy of the parameters when TCA designing.References
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