Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility
An increase in the share of renewable sources in the energy mix makes coal-fired power plants operate in new conditions that require more dynamic operation and adequate flexibility. The frequency of the power unit start-ups increases and so does the frequency of changes in loads. This intensifies so...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-07-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/13/3464 |
| _version_ | 1797563332314529792 |
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| author | Martyna Tomala Andrzej Rusin Adam Wojaczek |
| author_facet | Martyna Tomala Andrzej Rusin Adam Wojaczek |
| author_sort | Martyna Tomala |
| collection | DOAJ |
| description | An increase in the share of renewable sources in the energy mix makes coal-fired power plants operate in new conditions that require more dynamic operation and adequate flexibility. The frequency of the power unit start-ups increases and so does the frequency of changes in loads. This intensifies some life consumption processes, such as low-cycle fatigue and crack propagation in the turbine components. Further operation of power unit elements that have already been in service for a long time has to be supplemented with new diagnostic and repair procedures that take into account the intensification of life consumption processes. This article gives predictions about the propagation rate of potential cracks in the turbine rotor for different scenarios of the power unit’s long-term operation. A method is presented of rational selection of the diagnostic testing time based on risk analysis. The method is used to estimate the optimal interval after which diagnostic testing of a 200 MW turbine rotor should be carried out. Changes in the rotor steel crack toughness are evaluated based on the results of testing of microspecimens cut out of the rotor. Turbines with more frequent start-ups and shorter start-up times necessitate performance of diagnostic testing of the rotor central bore after about 12 years of turbine operation. |
| first_indexed | 2024-03-10T18:42:06Z |
| format | Article |
| id | doaj.art-ffa234f571e048008c7be8cf42bb7da0 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T18:42:06Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-ffa234f571e048008c7be8cf42bb7da02023-11-20T05:50:44ZengMDPI AGEnergies1996-10732020-07-011313346410.3390/en13133464Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased FlexibilityMartyna Tomala0Andrzej Rusin1Adam Wojaczek2Department of Power Engineering and Turbomachinery, Silesian University of Technology, 44-100 Gliwice, PolandDepartment of Power Engineering and Turbomachinery, Silesian University of Technology, 44-100 Gliwice, PolandDepartment of Power Engineering and Turbomachinery, Silesian University of Technology, 44-100 Gliwice, PolandAn increase in the share of renewable sources in the energy mix makes coal-fired power plants operate in new conditions that require more dynamic operation and adequate flexibility. The frequency of the power unit start-ups increases and so does the frequency of changes in loads. This intensifies some life consumption processes, such as low-cycle fatigue and crack propagation in the turbine components. Further operation of power unit elements that have already been in service for a long time has to be supplemented with new diagnostic and repair procedures that take into account the intensification of life consumption processes. This article gives predictions about the propagation rate of potential cracks in the turbine rotor for different scenarios of the power unit’s long-term operation. A method is presented of rational selection of the diagnostic testing time based on risk analysis. The method is used to estimate the optimal interval after which diagnostic testing of a 200 MW turbine rotor should be carried out. Changes in the rotor steel crack toughness are evaluated based on the results of testing of microspecimens cut out of the rotor. Turbines with more frequent start-ups and shorter start-up times necessitate performance of diagnostic testing of the rotor central bore after about 12 years of turbine operation.https://www.mdpi.com/1996-1073/13/13/3464maintenance planningriskturbine |
| spellingShingle | Martyna Tomala Andrzej Rusin Adam Wojaczek Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility Energies maintenance planning risk turbine |
| title | Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility |
| title_full | Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility |
| title_fullStr | Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility |
| title_full_unstemmed | Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility |
| title_short | Risk-Based Planning of Diagnostic Testing of Turbines Operating with Increased Flexibility |
| title_sort | risk based planning of diagnostic testing of turbines operating with increased flexibility |
| topic | maintenance planning risk turbine |
| url | https://www.mdpi.com/1996-1073/13/13/3464 |
| work_keys_str_mv | AT martynatomala riskbasedplanningofdiagnostictestingofturbinesoperatingwithincreasedflexibility AT andrzejrusin riskbasedplanningofdiagnostictestingofturbinesoperatingwithincreasedflexibility AT adamwojaczek riskbasedplanningofdiagnostictestingofturbinesoperatingwithincreasedflexibility |