TCL can provide a standalone device to provide compressor surge protection or include the function within a more comprehensive upgrade. e.g. the algorithms can be included in a processor which is providing fuel governor control functions. The necessary speed of response is achieved by programming a suitable interrupt period for the surge functions.
The operating envelope of a compressor can be divided up in to two sections; stable operation and surge, beyond the surge line the compressor surges. The surge controller is designed to maintain stable operation and keep the compressor out of the surge area. Compressor surge is the phenomenon of flow reversal caused by operating a compressor outside the limitations of its operating envelope.
TCL has designed a surge controller to maintain stable operation of a compressor using the head and flow (impeller eye) signals and a recycle valve. The Surge control is performed on the basis of measured pressure rise (head) versus flow (impeller eye differential pressure).
TCL has proven experience having implemented a surge control at a number of gas turbine compressor sites. Please see our project profile for the Perenco 27 Alpha.
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