Effect of coal-fired power plant flexible operating method on boiler header fatigue life

IF 1.5 4区工程技术 Q3 ENGINEERING, MECHANICAL Journal of Mechanical Science and Technology Pub Date : 2024-08-12 DOI:10.1007/s12206-024-0844-z

Jeong Myun Kim, Karam Han, Byeong Seon Choi, Seung Heon Song, Mingyu Park, Myung Hwan Choi

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Abstract

Due to the increase in renewable power generation sources, flexible operation is being required for large-capacity coal-fired power plants. Fatigue needs to be considered because the possibility of fatigue damage to equipment increases compared with rated operation. Existing studies qualitatively analyzed the impact on power generation facilities, and quantitative comparison studies were not conducted. Accordingly, this study comparatively analyzed the impact of flexible operation methods on the lifetime of boiler headers. Finite element analysis models were created to analyze stress in transient operation conditions, and fatigue rupture life was derived using fatigue test data from previous research. Then, as a result of assessing the fatigue life according to design criteria, the low load operation mode was confirmed to have a fatigue life 2.57 to 4.61 times longer than the start & stop mode. This study is intended to provide technical information for decision-making on flexible operation methods of power plants.

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燃煤电厂灵活运行方式对锅炉顶盖疲劳寿命的影响

由于可再生能源的增加，大容量燃煤发电厂需要灵活运行。需要考虑疲劳问题，因为与额定运行相比，设备疲劳损坏的可能性会增加。现有研究只是定性分析了对发电设备的影响，并没有进行定量比较研究。因此，本研究比较分析了灵活运行方式对锅炉顶盖使用寿命的影响。建立了有限元分析模型来分析瞬态运行条件下的应力，并利用以往研究中的疲劳测试数据得出疲劳断裂寿命。然后，根据设计标准对疲劳寿命进行评估，结果证实低负荷运行模式的疲劳寿命是启动&停止模式的 2.57 至 4.61 倍。这项研究旨在为电厂灵活运行方式的决策提供技术信息。

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来源期刊

Journal of Mechanical Science and Technology 工程技术-工程：机械

CiteScore

2.90

自引率

6.20%

发文量

517

审稿时长

7.7 months

期刊介绍： The aim of the Journal of Mechanical Science and Technology is to provide an international forum for the publication and dissemination of original work that contributes to the understanding of the main and related disciplines of mechanical engineering, either empirical or theoretical. The Journal covers the whole spectrum of mechanical engineering, which includes, but is not limited to, Materials and Design Engineering, Production Engineering and Fusion Technology, Dynamics, Vibration and Control, Thermal Engineering and Fluids Engineering. Manuscripts may fall into several categories including full articles, solicited reviews or commentary, and unsolicited reviews or commentary related to the core of mechanical engineering.