Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants
In this paper, a method for electric-resistance heating is proposed to reduce the thermal stress generated at a thick-walled pressure component during cold start-up in a coal-fired utility boiler. The aims of this approach are to shorten the start-up time and enhance the flexibility of the utility b...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25000887 |
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| author | Zhiwen Hou Liping Pang Binghao Zhang Jun Wang Liqiang Duan Huimin Wei Xiaoze Du |
| author_facet | Zhiwen Hou Liping Pang Binghao Zhang Jun Wang Liqiang Duan Huimin Wei Xiaoze Du |
| author_sort | Zhiwen Hou |
| collection | DOAJ |
| description | In this paper, a method for electric-resistance heating is proposed to reduce the thermal stress generated at a thick-walled pressure component during cold start-up in a coal-fired utility boiler. The aims of this approach are to shorten the start-up time and enhance the flexibility of the utility boiler. While focusing on a steam-water separator in a supercritical utility boiler, the finite element method (FEM) is employed in this study to analyze the thermal and mechanical stress amplitude and fatigue lifetime consumption parameters during cold start-up. An analysis of practical and optimized cold start-up is conducted. This start-up process involves the application of electric-resistance heating to a steam-water separator to shorten the boiler water filling time. Experiments are performed to investigate the differences in the inner and outer wall temperatures and thermal stresses under non-heating and electric-resistance heating conditions for a thick-walled component in an experimental facility being input with high-temperature and high-pressure steam. The results show that electric-resistance heating may reduce the thermal stresses and the fatigue lifetime consumption levels in thick-walled components when applied during cold start-up, and the cold start-up times are significantly shortened. The feasibility of this approach in practical engineering is confirmed through experiments. |
| format | Article |
| id | doaj-art-bb655a86511a4a2298f61a207fc07bba |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-bb655a86511a4a2298f61a207fc07bba2025-02-11T04:34:52ZengElsevierCase Studies in Thermal Engineering2214-157X2025-03-0167105828Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plantsZhiwen Hou0Liping Pang1Binghao Zhang2Jun Wang3Liqiang Duan4Huimin Wei5Xiaoze Du6School of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing, 102206, ChinaSchool of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing, 102206, China; State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU), Beijing, 102206, China; Corresponding author. School of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing, 102206, China.School of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing, 102206, ChinaSchool of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing, 102206, ChinaSchool of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing, 102206, China; State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU), Beijing, 102206, ChinaSchool of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing, 102206, China; State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU), Beijing, 102206, ChinaSchool of Energy, Power and Mechanical Engineering, North China Electric Power University, Changping District, Beijing, 102206, China; State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(NCEPU), Beijing, 102206, ChinaIn this paper, a method for electric-resistance heating is proposed to reduce the thermal stress generated at a thick-walled pressure component during cold start-up in a coal-fired utility boiler. The aims of this approach are to shorten the start-up time and enhance the flexibility of the utility boiler. While focusing on a steam-water separator in a supercritical utility boiler, the finite element method (FEM) is employed in this study to analyze the thermal and mechanical stress amplitude and fatigue lifetime consumption parameters during cold start-up. An analysis of practical and optimized cold start-up is conducted. This start-up process involves the application of electric-resistance heating to a steam-water separator to shorten the boiler water filling time. Experiments are performed to investigate the differences in the inner and outer wall temperatures and thermal stresses under non-heating and electric-resistance heating conditions for a thick-walled component in an experimental facility being input with high-temperature and high-pressure steam. The results show that electric-resistance heating may reduce the thermal stresses and the fatigue lifetime consumption levels in thick-walled components when applied during cold start-up, and the cold start-up times are significantly shortened. The feasibility of this approach in practical engineering is confirmed through experiments.http://www.sciencedirect.com/science/article/pii/S2214157X25000887Supercritical utility boilerThick-walled pressure componentsElectric-resistance heatingCold start-upFatigue lifetime consumption |
| spellingShingle | Zhiwen Hou Liping Pang Binghao Zhang Jun Wang Liqiang Duan Huimin Wei Xiaoze Du Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants Case Studies in Thermal Engineering Supercritical utility boiler Thick-walled pressure components Electric-resistance heating Cold start-up Fatigue lifetime consumption |
| title | Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants |
| title_full | Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants |
| title_fullStr | Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants |
| title_full_unstemmed | Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants |
| title_short | Enhancing the flexibility and safety of electric-resistance heating on thick-walled pressure parts of utility boilers in coal-fired power plants |
| title_sort | enhancing the flexibility and safety of electric resistance heating on thick walled pressure parts of utility boilers in coal fired power plants |
| topic | Supercritical utility boiler Thick-walled pressure components Electric-resistance heating Cold start-up Fatigue lifetime consumption |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25000887 |
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