SCR Flexible Operation

Key Research Question Increased variability in commercial power and relative fuel prices are forcing changes to fossil asset dispatching. In addition, increased deployment of renewable generation over the next decade will force coal plants to provide system load-balancing services. Specific operational changes expected for coal plants include two-shifting, high ramp rates, high unit turndown, and...

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Improving Unit Startups to Reduce Costs and Optimize Heat Rate

Key Research Question Caught between the requirements of environmental regulations, low gas prices permitting higher capacity factors of combined cycle units, and the variations due to renewable generation, the operating environment for formerly base-loaded coal plants has become more challenging.   All types of fossil-fired units are experiencing more startups.  In addition to the increased wear...

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Flexible Designs for Fossil Power

Key Research Question The mission profile is changing for many existing coal-fired plants. As a direct result of accommodating increased renewables into the grid, existing fossil assets are now being required to operate out with their original base loaded design conditions. This requirement for greater flexibility has an associated impact on the life and operational...

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FGD Air Toxics, Flexible Operations & Integrated WWT Impacts

Key Research Question Better understanding of FGD chemistry, underlying mechanisms and process changes is essential for improved capture of mercury and other trace elements, thereby allowing reliable yet cost-effective compliance of air pollution control mandates such as MATS.  In addition, this understanding will also enable achievement of better quality effluent discharge to the wastewater treatment...

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Methods to Evaluate Attemperator Spraywater Impingement

Key Research Question Attemperators that spray water into high pressure (HP) and reheat (RH) steam are commonly used to control HRSG outlet steam temperatures. Mal-performance of attemperators is common and often results in thermal fatigue damage to downstream steam piping, headers and tubes. Mal-performance can result from poor hardware design, interference with controls, hardware wear...

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