Coal-fired power plants are often required to cycle extensively and operate relatively infrequently due to power market conditions and an increasingly broad deployment of renewable energy. This cyclic (start-stop and/or fast ramp rate) operation can result in accumulation of fatigue damage, particularly in thick-walled components such as high temperature headers that experience the greatest thermal transients. In addition, components exposed to high temperature and pressure experience creep damage over time. Tracking the accumulation of creep and fatigue damage can aid in life management of these components. EPRI developed the Creep-FatiguePro™ system to monitor the accumulation of creep and fatigue damage in plant components while considering component geometry and the ongoing changes in operating conditions (temperatures, pressures and flow rates). The software requires a configuration process to define stress transfer functions for damage analysis and often involves performing a finite element analysis for each component geometry. Although accurate, this process can be time-consuming, especially if a large number of components are to be monitored. In a recent application of this system at the As Pontes power plant in Spain, a simple closed form analytical solution was used in the configuration process in order to more rapidly obtain the stress transfer functions. For direct interaction with the plant’s data historian, the software was also modified to support connection to the plant data system. Results using the two configuration approaches will be compared and recommendations made for future use in monitoring creep and fatigue damage in power plant components.
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ASME 2017 Pressure Vessels and Piping Conference
July 16–20, 2017
Waikoloa, Hawaii, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-5802-8
PROCEEDINGS PAPER
Online Creep-Fatigue Monitoring of Cyclic Operation in a Coal-Fired Power Plant
Stan T. Rosinski,
Stan T. Rosinski
Electric Power Research Institute, Charlotte, NC
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Kent Coleman,
Kent Coleman
Electric Power Research Institute, Charlotte, NC
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Mario Berasi,
Mario Berasi
Structural Integrity Associates, Uniontown, OH
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Curt Carney,
Curt Carney
Structural Integrity Associates, San Jose, CA
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Ulrich Woerz,
Ulrich Woerz
Structural Integrity Associates, Charlotte, NC
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Andres Sanchez,
Andres Sanchez
Endesa Generacion, S.A., Madrid, Spain
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Stefano Sigali,
Stefano Sigali
Enel Ingegneria e Ricerca S.p.A., Pisa, Italy
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Nicola Rossi
Nicola Rossi
Enel Ingegneria e Ricerca S.p.A., Pisa, Italy
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Stan T. Rosinski
Electric Power Research Institute, Charlotte, NC
Kent Coleman
Electric Power Research Institute, Charlotte, NC
Mario Berasi
Structural Integrity Associates, Uniontown, OH
Curt Carney
Structural Integrity Associates, San Jose, CA
Ulrich Woerz
Structural Integrity Associates, Charlotte, NC
Andres Sanchez
Endesa Generacion, S.A., Madrid, Spain
Stefano Sigali
Enel Ingegneria e Ricerca S.p.A., Pisa, Italy
Nicola Rossi
Enel Ingegneria e Ricerca S.p.A., Pisa, Italy
Paper No:
PVP2017-65055, V007T07A001; 8 pages
Published Online:
October 26, 2017
Citation
Rosinski, ST, Coleman, K, Berasi, M, Carney, C, Woerz, U, Sanchez, A, Sigali, S, & Rossi, N. "Online Creep-Fatigue Monitoring of Cyclic Operation in a Coal-Fired Power Plant." Proceedings of the ASME 2017 Pressure Vessels and Piping Conference. Volume 7: Operations, Applications and Components. Waikoloa, Hawaii, USA. July 16–20, 2017. V007T07A001. ASME. https://doi.org/10.1115/PVP2017-65055
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