Through independent innovation, Shenba Turbine R&D Center successfully completed the research on the aerodynamic design method of large air separation air compressors, developed six special model grades, reduced the size of centrifugal compressors for large air separation units, and achieved isothermal efficiency of the whole machine. 0.72~0.73. This project with world-class level can lay a solid foundation for aerodynamic theory for the development of new products, and greatly improve the market competitiveness of air compressors, and will also bring greater economic benefits to enterprises.
At present, the mark of the advanced level of centrifugal compressors for large air separation plants in the world is: the first stage flow coefficient φ1 is about 0.13~0.15; the isothermal efficiency of the unit is 0.71~0.73. In order to manufacture units that reach the world's advanced level, two technical problems need to be solved: first, to develop a new aerodynamic design method, to improve the original design method based on the basic level of the compressor; second, through a variety of designs The calculation and comparison of the scheme determines the overall design of the air compressor and the technical indicators of the female model level required to implement this scheme.
Faced with the challenges of heavy tasks and technical difficulties, the scientific and technological personnel of the R&D Center successfully completed the development of the project with their high professional level and determined work spirit. These model grades use a new aerodynamic design scheme to maximize the performance of the model level, effectively improve product efficiency and working range, and ensure efficient operation of centrifugal compressors for large air separation plants.
Data background:
The centrifugal compressor for a large-scale air separation unit refers to an air compressor for an air separation unit of 28,000 or more. The flow rate is 3000 m3/min or more, and the pressure ratio is 6.5 to 7.0. The drive machine is mostly an electric motor, and has high power and high energy consumption. Therefore, reducing the size of the machine, reducing the manufacturing cost, improving the efficiency, and reducing the energy consumption have become the efforts of the advanced manufacturers in the world.
To achieve this goal, a new aerodynamic design method must be developed to overcome the original basic-level compressor design method. The R&D center's scientific and technical personnel firstly based on the parent type, through the quasi-similar cutting and performance correction to achieve the optimal aerodynamic design of the product.
Secondly, through the calculation and comparison of various design schemes, the overall design scheme of the air compressor and the mother model level technical indicators to be developed by this scheme are determined. It is necessary to develop a semi-open transonic stage with high energy head and large flow coefficient as the first. level. At the same time, it is necessary to develop three closed parent model levels, and then derive five model levels through derivative calculations, as the last three levels of different machine solutions to achieve the above research and development goals.
After a large number of program design, CFD analysis and six model-level tests on the model-level test bench (two in the semi-open model level and four in the closed model level). Finally, according to the analysis of the test results and the cutting derivative calculation, the six model grades for the large air separation air compressor are obtained, which reduces the size of the centrifugal compressor for the large air separation unit. The isothermal efficiency of the whole machine reaches 0.72~0.73, reaching the world advanced level. .
At present, the mark of the advanced level of centrifugal compressors for large air separation plants in the world is: the first stage flow coefficient φ1 is about 0.13~0.15; the isothermal efficiency of the unit is 0.71~0.73. In order to manufacture units that reach the world's advanced level, two technical problems need to be solved: first, to develop a new aerodynamic design method, to improve the original design method based on the basic level of the compressor; second, through a variety of designs The calculation and comparison of the scheme determines the overall design of the air compressor and the technical indicators of the female model level required to implement this scheme.
Faced with the challenges of heavy tasks and technical difficulties, the scientific and technological personnel of the R&D Center successfully completed the development of the project with their high professional level and determined work spirit. These model grades use a new aerodynamic design scheme to maximize the performance of the model level, effectively improve product efficiency and working range, and ensure efficient operation of centrifugal compressors for large air separation plants.
Data background:
The centrifugal compressor for a large-scale air separation unit refers to an air compressor for an air separation unit of 28,000 or more. The flow rate is 3000 m3/min or more, and the pressure ratio is 6.5 to 7.0. The drive machine is mostly an electric motor, and has high power and high energy consumption. Therefore, reducing the size of the machine, reducing the manufacturing cost, improving the efficiency, and reducing the energy consumption have become the efforts of the advanced manufacturers in the world.
To achieve this goal, a new aerodynamic design method must be developed to overcome the original basic-level compressor design method. The R&D center's scientific and technical personnel firstly based on the parent type, through the quasi-similar cutting and performance correction to achieve the optimal aerodynamic design of the product.
Secondly, through the calculation and comparison of various design schemes, the overall design scheme of the air compressor and the mother model level technical indicators to be developed by this scheme are determined. It is necessary to develop a semi-open transonic stage with high energy head and large flow coefficient as the first. level. At the same time, it is necessary to develop three closed parent model levels, and then derive five model levels through derivative calculations, as the last three levels of different machine solutions to achieve the above research and development goals.
After a large number of program design, CFD analysis and six model-level tests on the model-level test bench (two in the semi-open model level and four in the closed model level). Finally, according to the analysis of the test results and the cutting derivative calculation, the six model grades for the large air separation air compressor are obtained, which reduces the size of the centrifugal compressor for the large air separation unit. The isothermal efficiency of the whole machine reaches 0.72~0.73, reaching the world advanced level. .
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