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Consensus on Operating Practices for Control of Water and Steam Chemistry in Combined Cycle and Cogeneration

Edward Beardwood
Edward Beardwood
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ASME Press
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There are a variety of HRSG configurations and operating pressures. For the purposes of this document two configurations have been considered: an industrial HRSG and a three-drum HRSG where the steam is used in a steam turbine to generate electrical power. These are shown in Figures 1–2. The chemical limits are always dictated by the steam purity requirements, the highest drum pressure on the HRSG, and, if applicable, by the highest pressure at the duct-fired condition.

Although the temperature of the turbine exhaust is much lower than the flue gas temperatures in an equivalent water-tube boiler, sudden heat flux changes...

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