Analysis of Platen Superheater Tube Degradation in Thermal Power Plants via Destructive/Non-Destructive Characteristic Evaluation
Coal-fired power plants operating under Korea’s standard supercritical pressure operate in a high-temperature environment, with steam temperatures reaching 540 °C. A standard coal-fired power plant has a 30-year design life, and lifespan diagnosis is performed on facilities that have operated for mo...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/2/581 |
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| author | Se-Beom Oh Jongbeom Kim Soon-Woo Han Kyung-Mo Kim Dong-Seok Yun Dong-Wook Kim |
| author_facet | Se-Beom Oh Jongbeom Kim Soon-Woo Han Kyung-Mo Kim Dong-Seok Yun Dong-Wook Kim |
| author_sort | Se-Beom Oh |
| collection | DOAJ |
| description | Coal-fired power plants operating under Korea’s standard supercritical pressure operate in a high-temperature environment, with steam temperatures reaching 540 °C. A standard coal-fired power plant has a 30-year design life, and lifespan diagnosis is performed on facilities that have operated for more than 100,000 h or 20 years. Visual inspection, thickness measurements, and hardness measurements in the field are used to assess the degree of material degradation at the time of diagnosis. In this study, aging degradation was assessed using an electromagnetic acoustic transducer to measure the change in transverse ultrasonic propagation speed, and the results were compared to microstructural analysis and tensile test results. Based on the experimental results, it was found that the boiler tube exposed to a high-temperature environment during long-term boiler operation was degraded and damaged, the ultrasonic wave velocity was reduced, and the microstructural grains were coarsened. It was also confirmed through tensile testing that the tensile and yield strengths increased with degradation. Our findings prove that the degree of change in mechanical properties as a function of the material’s degradation state is proportional to the change in ultrasonic wave velocity. |
| first_indexed | 2024-03-10T01:03:01Z |
| format | Article |
| id | doaj.art-e9682e78f05047239b443667b6cdff39 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T01:03:01Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e9682e78f05047239b443667b6cdff392023-11-23T14:31:30ZengMDPI AGMaterials1996-19442022-01-0115258110.3390/ma15020581Analysis of Platen Superheater Tube Degradation in Thermal Power Plants via Destructive/Non-Destructive Characteristic EvaluationSe-Beom Oh0Jongbeom Kim1Soon-Woo Han2Kyung-Mo Kim3Dong-Seok Yun4Dong-Wook Kim5Materials Safety Technology Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, KoreaMaterials Safety Technology Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, KoreaMaterials Safety Technology Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, KoreaMaterials Safety Technology Development Division, Korea Atomic Energy Research Institute, Daejeon 34057, KoreaTechnical Expertise Research Center, Korea East-West Power Co., Ltd., Daejeon 35377, KoreaTechnical Expertise Research Center, Korea East-West Power Co., Ltd., Daejeon 35377, KoreaCoal-fired power plants operating under Korea’s standard supercritical pressure operate in a high-temperature environment, with steam temperatures reaching 540 °C. A standard coal-fired power plant has a 30-year design life, and lifespan diagnosis is performed on facilities that have operated for more than 100,000 h or 20 years. Visual inspection, thickness measurements, and hardness measurements in the field are used to assess the degree of material degradation at the time of diagnosis. In this study, aging degradation was assessed using an electromagnetic acoustic transducer to measure the change in transverse ultrasonic propagation speed, and the results were compared to microstructural analysis and tensile test results. Based on the experimental results, it was found that the boiler tube exposed to a high-temperature environment during long-term boiler operation was degraded and damaged, the ultrasonic wave velocity was reduced, and the microstructural grains were coarsened. It was also confirmed through tensile testing that the tensile and yield strengths increased with degradation. Our findings prove that the degree of change in mechanical properties as a function of the material’s degradation state is proportional to the change in ultrasonic wave velocity.https://www.mdpi.com/1996-1944/15/2/581thermal power plantplaten superheaterboiler tubeX20ultrasonic non-destructive evaluationtensile test |
| spellingShingle | Se-Beom Oh Jongbeom Kim Soon-Woo Han Kyung-Mo Kim Dong-Seok Yun Dong-Wook Kim Analysis of Platen Superheater Tube Degradation in Thermal Power Plants via Destructive/Non-Destructive Characteristic Evaluation Materials thermal power plant platen superheater boiler tube X20 ultrasonic non-destructive evaluation tensile test |
| title | Analysis of Platen Superheater Tube Degradation in Thermal Power Plants via Destructive/Non-Destructive Characteristic Evaluation |
| title_full | Analysis of Platen Superheater Tube Degradation in Thermal Power Plants via Destructive/Non-Destructive Characteristic Evaluation |
| title_fullStr | Analysis of Platen Superheater Tube Degradation in Thermal Power Plants via Destructive/Non-Destructive Characteristic Evaluation |
| title_full_unstemmed | Analysis of Platen Superheater Tube Degradation in Thermal Power Plants via Destructive/Non-Destructive Characteristic Evaluation |
| title_short | Analysis of Platen Superheater Tube Degradation in Thermal Power Plants via Destructive/Non-Destructive Characteristic Evaluation |
| title_sort | analysis of platen superheater tube degradation in thermal power plants via destructive non destructive characteristic evaluation |
| topic | thermal power plant platen superheater boiler tube X20 ultrasonic non-destructive evaluation tensile test |
| url | https://www.mdpi.com/1996-1944/15/2/581 |
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