Method and system for anti-surge control of the turbo compressor having a side stream

摘要

Resulting in a at least one of the upstream compressor stage (51), and at least one downstream compressor stage (52), the flow in the flow path between the upstream compressor stage and a downstream compressor stage , the system comprising a compressor having at least one substream (59), a method for providing the anti-surge control is described. This method uses a dimensionless performance map of the upstream compressor stage, to estimate the temperature of the discharged flow by the upstream compressor stage (51), the mass flow rate of flow discharged by the downstream compressor stage and temperature of the stream, and based on the mass flow rate and temperature of the stream of sidestream are provided to further estimate the temperature of the flow entering the downstream compressor stage (52). The method also based on the temperature of the flow entering the downstream compressor stage is provided in order to perform the anti-surge control of a downstream compressor stage (52).FIELD 4