This paper presents a method for performance prediction of a potential centrifugal compressor, based on the process data at the design point. The procedure is based on a study of the design practice for a number of vendors for the North Sea hydrocarbon processing industry. The study shows that todays compressor vendors tend to follow the classic design rules developed in the early sixties. These design rules can be applied on the process data from a plant simulation to create an imaginary compressor. A mean line prediction method is used to predict the off-design performance over the total operating range of the compressor. A successful prediction depends on the finally chosen compressor being well designed for the given operating point. The procedure, in the form of PC-based programs, has been applied in conceptual studies and modification studies of off-shore compression plants.

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