MODELLING OF STATIC MODES FUNCTION OF THE REFRIGERATION CENTRIFUGAL COMPRESSOR
DOI:
https://doi.org/10.15673/0453-8307.6/2015.52013Keywords:
Centrifugal compressor - Refrigerating machinery – Turbocompressor plant –Static characteristics of the compressor – Model of the compressorAbstract
The aim of our scientific work is to improve the accuracy of static modes simulation of the centrifugal compressors operation. To achieve this scientific aim we have carried out the models designing the centrifugal compressors characteristics. These characteristics must be obtained at various speeds of rotation and the angles of the vanes of the diffuser. The model of the refrigeration centrifugal compressor is realized in MATLAB\Simulink program presented in this article. The modern achievements review in the field of centrifugal compressors modeling is presented. We have substantiated the necessity of the centrifugal compressor modeling in this paper. The tabular data describing static characteristics of the compressors is shown. These tabular data are determined in the Lookup Table blocks. The model is represented by these blocks in the MATLAB\Simulink program. We have also presented the alternative compressor model. This realized model is based of the interpolation spline functions. This alternative model is presented in the DC-Net program. DC-Net program is destined for modeling and research of the logical-dynamic systems. The centrifugal compressors model is presented in the DC-Net program as the logical-dynamic systems. The compressor static characteristics set received as a result modeling is shown in this article. It is presented twelve characteristics in axes. The pressure ratio and the refrigerant flow denote on the axes. These static characteristics can be compared with experimental characteristics to assess the model adequacy. The assessment of the model adequacy is realized on the basis of the simulation results comparison. We have presented the simulation results comparison obtained in the various models. We have presented the conclusions about the optimal methods of the synthesis model.References
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