Degradation Effects on Combined Cycle Power Plant Performance: Part 2 — Steam Turbine Cycle Component Degradation Effects

Zwebek, A.; Pilidis, Pericles

doi:10.1115/2001-gt-0389

Cited by 5 publications

(4 citation statements)

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“…Once k* are calculated for each y, then the unit thermoeconomic cost c* can be calculated straightaway, as described in Eq. (7).…”

Section: Other Thermoeconomic Indicatorsmentioning

confidence: 99%

“…Figs. [7][8][9][10][11] show how the thermoeconomic methodology applied to the bottoming cycle can estimate the economic impact of performance degradation over the plant products.…”

Section: Ndi ¼mentioning

confidence: 99%

“…The performance evaluation is repeated at regular intervals with the object of calculating the degradation of different elements of the plant. Degradation is defined as a worsening of performance and can be caused, depending on the plant component, by various phenomena: from compressor fouling to turbine blade oxidation or corrosion, heat exchanger fouling, and so on [7]. A detailed diagnostic thermoeconomic analysis can bring about important improvements in power plant management, such as: instant information about the operation of the plant, through the calculation of efficiency and degradation indexes; troubleshooting: fast identification of the malfunctioning component and the possibility of reducing maintenance shutdowns of the plant, using targeted interventions; performance improvement; better management of maintenance (predictive maintenance); optimization of plant operation.…”

Section: Introductionmentioning

confidence: 99%

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Monitoring of the thermoeconomic performance in an actual combined cycle power plant bottoming cycle

Cafaro

Napoli

Traverso

et al. 2010

Energy

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“…Once k* are calculated for each y, then the unit thermoeconomic cost c* can be calculated straightaway, as described in Eq. (7).…”

Section: Other Thermoeconomic Indicatorsmentioning

confidence: 99%

“…Figs. [7][8][9][10][11] show how the thermoeconomic methodology applied to the bottoming cycle can estimate the economic impact of performance degradation over the plant products.…”

Section: Ndi ¼mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Monitoring of the thermoeconomic performance in an actual combined cycle power plant bottoming cycle

Cafaro

Napoli

Traverso

et al. 2010

Energy

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“…The performance evaluation is * Corresponding author: DIMSET repeated at regular intervals with the objective of calculating the degradation of the different elements of the plant. The degradation is defined as a worsening performance and can be caused, depending on plant component, by various phenomena: from compressor fouling to turbine blade oxidation or corrosion, heat exchangers fouling, and so on [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Heat recovery steam generator performance and degradation in a 400 MW combined cycle

Cafaro

Traverso

Massardo

2009

Proceedings of the Institution of Mechanical Engineers, Part A:

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This article presents a research project carried out by the Thermochemical Power Group of the University of Genoa and is concerned with the monitoring of a three pressure level heat recovery steam generator (HRSG).The work consists of the development of an original computer code using Matlab software that calculates the performance of heat exchangers, at different power plant operating conditions. This kind of software was developed with a twofold objective: to calculate the actual gas path inside the HRSG starting from the available measurements, thus obtaining the current effectiveness of all the heat exchangers in the HRSG, and to estimate the expected performance of each heat exchanger to be compared with the actual ones.Once the actual effectiveness and the expected effectiveness of the heat exchanger are defined, non-dimensional performance parameters suitable for degradation assessment can be defined. As a result of the sensitivity analysis, each performance parameter is coupled with an accuracy factor. The developed methodology has been successfully applied to historical logged data (3 years) of an existing large size (400 MW) combined cycle, showing good capabilities in estimating the degradation of the HRSG throughout plant life.

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Degradation Effects on Combined Cycle Power Plant Performance—Part I: Gas Turbine Cycle Component Degradation Effects

Zwebek

Pilidis

2003

Journal of Engineering for Gas Turbines and Power

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This paper describes the effects of degradation of the main gas path components of the gas turbine topping cycle on the combined cycle gas turbine (CCGT) plant performance. First, the component degradation effects on the gas turbine performance as an independent unit are examined. It is then shown how this degradation is reflected on a steam turbine plant of the CCGT and on the complete combined cycle plant. TURBOMATCH, the gas turbine performance code of Cranfield University, was used to predict the effects of degraded gas path components of the gas turbine have on its performance as a whole plant. To simulate the steam (bottoming) cycle, another Fortran code was developed. Both codes were used together to form a complete software system that can predict the CCGT plant design point, off-design, and deteriorated (due to component degradation) performances. The results show that the overall output is very sensitive to many types of degradation, especially in the turbine of the gas turbine. Also shown is the effect on gas turbine exhaust conditions and how this affects the steam cycle.

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Degradation Effects on Combined Cycle Power Plant Performance: Part 2 — Steam Turbine Cycle Component Degradation Effects

Cited by 5 publications

References 0 publications

Monitoring of the thermoeconomic performance in an actual combined cycle power plant bottoming cycle

Monitoring of the thermoeconomic performance in an actual combined cycle power plant bottoming cycle

Heat recovery steam generator performance and degradation in a 400 MW combined cycle

Degradation Effects on Combined Cycle Power Plant Performance—Part I: Gas Turbine Cycle Component Degradation Effects

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