Guidelines for Control of Flow-Accelerated Corrosion in Fossil and Combined Cycle Plants

Flow-accelerated corrosion (FAC) occurs when the normally protective magnetite layer on carbon steel dissolves into either a stream of flowing water or wet steam. There are three main mechanisms to understanding FAC: hydrodynamics, water chemistry, and component materials. This report discusses these three mechanisms in detail to determine where FAC concerns should be the highest...

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Non-Battery Bulk Energy Storage: Options for Thermal Energy Storage Integration with Fossil Power Plants

As more non-dispatchable renewable generation resources are added to the power grid, it puts pressure on the ability of the existing dispatchable resources to balance their intermittent nature. Existing fossil plants have some capability to deliver flexible output to keep the current grid stable when renewable generators drop off or begin generation unexpectedly (i.e., solar...

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Flexible Operation of Hydropower Plants

The purpose of this report is to summarize the current knowledge related to the flexible operation of hydroelectric units, including accelerated degradation of components and associated infrastructure. The report provides insights and information to support hydropower decision makers when facing an increase in flexible operation of their hydroelectric units. The report summarizes the trends and...

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Unit Ramp Rate Optimization Guidelines: Methodology and Technical Approach

Improving the operational flexibility of steam generating units is increasingly important to support the evolution of the bulk power system. Updating plant operations and controls to provide more dynamic response to load changes, consistent with the capabilities of installed equipment and systems, is an important element of this effort. This report presents a methodology for...

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Repair and Evaluation of HRSG Perforated Flow Distribution Plates

Uncooled structures installed in the hot end of the heat recovery steam generator (HRSG) are exposed to large thermal transients and high-velocity, turbulent gas flow. If these structures are not carefully designed and installed, this harsh environment often results in their requiring routine, if not excessive, maintenance. Such structures are generally intended to evenly distribute...

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