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The degrading effects of pressure loss may be magnified in cases where the perforated plate is exposed to higher flows. Restricting incoming flow to the perforated plate would result in lower pressure losses.
Consequently, by injecting tempering air downstream of the perforated plate, the overall pressure drop of the simple cycle exhaust system would be minimized.
Conclusion
In many simple cycle power plant applications, the exhaust gas temperature exceeds upper temperature limit for the reduction catalyst installed for the NOX emissions control. As a result, some form of cooling of the exhaust must be introduced at most power loads. The most efficient cooling method is injection of the ambient air. The location of the injection plays a critical role, considering performance of the oxidation and reduction catalysts.
Two arrangements of the tempering air injection have been discussed. In a conventional arrangement, tempering air is injected at the simple cycle turbine discharge. Both CO and NOX emissions control catalyst
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Editor’s note: This paper, PWR2010-27310, was printed with permission from ASME and was edited from its original format. To purchase this paper in its original format or find more information, visit the ASME Digital Store at www.asme.org.
Dr. Mark Buzanowski is the manager of Design Engineering with Peerless Mfg. Co. He has experience managing mechanical and chemical engineering activities and has received several awards including the ASME North Texas Section 2007 Outstanding Engineer Award and The Prime Movers Award by ASME. He is a frequent speaker at international conferences and has published more than 40 papers and conference presentations and authored more than 10 patent disclosures. Buzanowski received his PhD from Polish academy of Sciences in chemical engineering and MS/BS in mechanical and power engineering from Silesian University, Poland. You may contact him by e-mailing editorial@woodwardbizmedia.com.
Sean P. McMenamin is vice president of Manufacturing and Supply Chain Management at Peerless Mfg. Co., where he is responsible for 4 domestic and one international manufacturing operation. Prior to this position, McMenamin was the V.P. of Environmental Systems for Peerless Mfg., responsible for sales, engineering and market development. He has been with Peerless for almost 10 years, representing operations supporting SCR projects, pressure vessel projects and separation system projects in the power and refining industries. McMenamin received his bachelor’s degree in Mechanical Engineering from New Jersey Institute of Technology and his MBA in Finance from Lehigh University. His work experience spans 20 years by working in the mechanical and environmental fields with Foster Wheeler Energy Corporation and the U.S. Navy. You may contact him by e-mailing editorial@woodwardbizmedia.com.
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