Modeling of working processes in low-speed reciprocating compressors of compact refrigeration units
Annotation
The paper concerns the problem of creating compact refrigerating machines in which, due to the peculiarities of the compression mode in the compressor, the load on the condenser is significantly reduced. Previous studies on carbon dioxide showed the possibility of a low-speed compressor operating in the area of wet steam during compression. The accumulated modeling experience allowed obtaining data on the temperature of the compressor wall and, for existing dependencies describing the condensation process, obtaining data on the operation of a low-speed compressor in a refrigeration machine when running on carbon dioxide. At the same time, they were obtained both with complete condensation of the working fluid and in the absence of condensation, but at temperatures close to condensation temperatures. Taking into account the specifics of the operation of low-speed compressors, namely the possibility of obtaining large values of the pressure-to-discharge pressure ratio, the integral characteristics of the compressor were obtained with a pressure ratio in the stage equal to 5.7, which showed a significant superiority in this indicator over existing compressors. Further research is aimed at conducting experimental studies and verifying the presented calculation model.
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