Steam Turbine Bypass Systems by Robert W. Anderson (Progress Energy Inc) and Henk van Ballegooyen

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The often excellent operation of large gas turbine generators, multi-pressure reheat heat recovery steam generators and steam turbine generators in large combined-cycle power plants operated at 100% load, can sometimes become awkward and troublesome during transient conditions of startup, low-load, steam turbine trip and shutdown conditions.

This article discusses steam turbine bypass systems, sparger tubes, steam attemperation control, condenser dump-bypass system design, and noise problems in regard to current HEI and EPRI design practices, and provides recommendations for future plant designs.