Redesign of a compressor antisurge control loop using dynamic simulation

摘要

As a result of increasing fuel demand, investments are strong; for constructing new plants and expansions in existing facilities. This rapid development of the oil and gas market is driving growth in the demand for large-scale compressor trains. A compressor represents an important investment in a gas plant or refinery. Hence, it is very critical to have a reliable compressor system design that includes the surge protection system. Factors to consider in designing an effective antisurge system include proper selection, location and sizing of recycle loops, recycle valves, equipment volumes in the recycle path, check valve locations and, most importantly, the antisurge controllers. Improper sizing of an antisurge loop and possibility of liquid flow into the compressor not only increase the operating cost but also pose safety hazards.