Analysis of the Relationship between the Design, Operating Parameters, and Integral Characteristics of Low-Flow Industrial Piston Compressors Based on Low-Speed Compressor Stages
摘要
Considered operating processes and integral characteristics of piston long-stroke low-speed compressor stages when using various process gases as the working fluid. The study examined two design variants of a long-stroke, low-speed compressor stage: a basic version with a standard arrangement of self-acting valves in the working chamber, and a modernized version, which incorporates the advantages of known technologies for increasing the delivery efficiency, including selection of the main dimensions and parameters of the stage; changes in the dimensions and design of the valves, changes in the design of the cylinder–piston seal; and changes in the arrangement of the suction valve in the working chamber. The indicated efficiency, delivery coefficient, and discharge temperature are considered as integral indicators. Thermodynamic and thermophysical properties of the working gas, its state parameters at the suction, discharge pressure, main dimensions, and stage parameters were used as independent parameters. A comparative analysis of the efficiency of the working process of the stage under consideration was carried out in the range of medium and high pressures using gases with significantly different molecular weights as the working fluid. For the gases under consideration, a comparative assessment of the delivery coefficient, indicated efficiency, and discharge temperature was carried out in the considered range of discharge pressures for the basic and modernized stage designs. The presented results reflect the competitive capabilities of the stage in question in comparison with existing industrial analogues, including in terms of their weight and dimensions.