DESIGN OF A SINGLE STAGE CENTRIFUGAL COMPRESSOR FOR REFRIGERANTS

Abstract

A centrifugal compressor] like a pump is a head or pressure producing device, jerformance wise, the centrifun.gal compressor is less efficient than the axial type. However a much higher pressure ratio compared to the axial type and wider range of stable operation are some of the attractive aspects of centrifugal compressor. It can handle a high volume flow rate of fluidwing to these attractive features, centrifugal compressors are used in large refrige:.ration plants. To fulfil the requirement of a large capacity Ammonia plant, this work has been done. The design of a single stage centrifugal compressor is based on one dimensional axisymmetric flow of refrigerant. The mathematical model has been prepared in chapter 4 entitled `DESIGN METHODOLOGY'. It is clear from the results and performance curves that a single stage centrifugal compressor is suitable for Ammonia refrigerant when pressure ratio required is low. For higher pressure ratio, multistaging has to be done.