In This Issue
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GasFluid dynamics of the HRSG gas side
Designers of heat-recovery steam generators are using computational fluid dynamics software as one tool to reveal the invisible forces affecting the flow over, under, around, and through structures such as inlet ducts, distribution grids, and guide vanes.
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CoalMap: Combined-cycle plants constitute about 20% of U.S. generating capacity
Copyright 2006 Platts, a Division of the McGraw-Hill Companies. All rights reserved. 800-PLATTS-8. Data Source: Platts Energy Advantage www.maps.platts.com
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CoalDesigning wet duct/stack systems for coal-fired plants
A multitude of variables must be accounted for during the design and development of a wet-stack flue gas desulfurization system. The five-phase process detailed below has proven effective on more than 60 wet-stack system design studies. A basic understanding of these concepts will help inform early design decisions and produce a system amenable to wet operation.
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CoalDesigning HRSG desuperheaters for performance and reliability
Increased cycling of combined-cycle plants has made precise control of attemperator spray water within heat-recovery steam generators more important if damage to their hardware and piping is to be avoided. Complicating the issue is the industry’s still-limited experience with cycling and the fact that demands on the attemperator and turbine bypass of cycled plants are more stringent than those on baseloaded units.
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Poor priorities
I couldn’t help but marvel at the synchronicity of two unrelated events over the past few weeks. The first, on January 12, was the rare cancellation of a major military acquisition program with problems called “too expensive to fix.” It takes an Act of Congress to kill most military contracts due to the pork flowing […]
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GasFleetwide standardization of steam cycle chemistry
Nearly five years ago, a major IPP began standardizing steam cycle chemistry feed, control, and monitoring across its combined-cycle fleet. This article discusses the steps taken, the costs incurred, and the technical and financial benefits achieved. Although the project focused on non-cogeneration plants, the findings detailed below are broadly applicable to other kinds of plants. However, the specific implementations (especially of the chemistry standards) described may have to be modified slightly for application to cogen plants.
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News
Poor Priorities
I couldn’t help but marvel at the synchronicity of two unrelated events over the past few weeks. The first, on January 12, was the rare cancellation of a major military acquisition program with problems called “too expensive to fix.” It takes an Act of Congress to kill most military contracts due to the pork flowing […]