Monitoring the Thermal Stress State in Steam Turbines

Radin, Yu. A.; Конторович, Т. С.; Golov, P. V.

doi:10.1007/s10749-020-01146-6

Cited by 3 publications

(1 citation statement)

References 1 publication

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“…Also the temperature profile is subject to considerable fluctuations which are a result of unstable boiler operation. The new operating profiles and requirements for lifetime extension cause a need for improved lifetime assessment and monitoring of steam turbines [17,24]. The traditional methods based on elastic stress analyses and representative operating data fail to satisfy the present requirements regarding accuracy and reliability of predictions.…”

Section: Introductionmentioning

confidence: 99%

Concept of advanced lifetime monitoring system for steam turbines

Banaszkiewicz¹

2021

Diagnostyka

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The increasing share of renewables in electricity production adversly affects the operation of thermal plants, including steam turbine units. Intermittency of renewable sources results in high variability of steam turbine operating conditions, which together with the inherent scatter of turbine operating parameters significantly complicates their lifetime assessment. The paper presents a concept of lifetime monitoring system in scope of creep-fatigue damage. The system is based on online and offline calculations, performs online analysis of measurement data and takes into account the results of material tests. Functionality of the system main modules is described and mathematical models suitable for online calculations are presented. A general concept of hardware configuration for the system is proposed as well.

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Section: Introductionmentioning

confidence: 99%

Concept of advanced lifetime monitoring system for steam turbines

Banaszkiewicz¹

2021

Diagnostyka

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Development of a health monitoring framework: Application to a supercritical pulverized coal-fired boiler

Hedrick,

Omell,

Zitney

et al. 2024

Energy

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Real-time evaluation method of turbine rotor’s thermal stress with governing stage partial admission condition at low-load

Yao

Fan

et al. 2022

JCM

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In order to ensure the safety and stability of the new energy power system, many power units will be maintained at low-load state for a long time during peak-load regulation in China. However, the partial arc admission of the nozzle governing mode will cause uneven temperature distribution in the circumferential direction after GS, which will affect real-time thermal stress of the rotor. Toward this end, this paper proposes a real-time evaluation method of thermal stress for rotors in low-load conditions. First of all, the solution boundary conditions of thermal stress model can be obtained by designing the measuring points arrangement after GS, which comprehensively takes into account the uneven temperature distribution of GS under low-load conditions. In the meantime, various punching schemes are analyzed by ANSYS, which used to analyze the influence of cylinder structure strength caused by the new measuring point punching of each scheme. The result shows that the punching impact on the stress and deformation of cylinder is not obvious, which has a great significance to reduce minimum technical output and improve peak governing capability of thermal power unit.

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Monitoring the Thermal Stress State in Steam Turbines

Cited by 3 publications

References 1 publication

Concept of advanced lifetime monitoring system for steam turbines

Concept of advanced lifetime monitoring system for steam turbines

Development of a health monitoring framework: Application to a supercritical pulverized coal-fired boiler

Real-time evaluation method of turbine rotor’s thermal stress with governing stage partial admission condition at low-load

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