Remaining life assessment of a high pressure turbine casing in creep and low cycle service regime
Апстракт
Thick walled components such as high pressure (HP) steam turbine casings operating under high parameter conditions are subjected to a complex stress state. As a result of that stress state, some parts of HP turbine casing undergo to the creep fatigue caused by the combination of thermal fatigue resulted from repeated start/stop operation and the creep which occurs during long-term operation at high temperature and high-pressure. It is well known that domestic thermal power plants have been in use over 100000 h which means that significant cost is required not only for maintenance, but often for renewal of equipment. Based on comprehensive investigation, the results of residual life assessment of one high pressure steam turbine casing, which belongs to the older turbine generation, taking into account simultaneous action of thermal fatigue and creep, are presented in this paper. Also, the critical flaw crack size of HP turbine casing is determined because this parameter has a strong inf...luence on casing integrity and residual life. The results of residual life assessment provide not only a basis for further maintenance, but also estimated time for reparation or renewal.
Кључне речи:
remaining life assessment / high pressure steam turbine casing / creep-fatigue interactionИзвор:
Thermal Science, 2014, 18, S127-S138Издавач:
- Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd
DOI: 10.2298/TSCI121219179B
ISSN: 0354-9836
WoS: 000338690200015
Scopus: 2-s2.0-84907060768
Институција/група
Inovacioni centarTY - JOUR AU - Bakić, Gordana AU - Šijački-Žeravčić, Vera AU - Đukić, Miloš AU - Rajičić, Bratislav AU - Tasić, Marko M. PY - 2014 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2019 AB - Thick walled components such as high pressure (HP) steam turbine casings operating under high parameter conditions are subjected to a complex stress state. As a result of that stress state, some parts of HP turbine casing undergo to the creep fatigue caused by the combination of thermal fatigue resulted from repeated start/stop operation and the creep which occurs during long-term operation at high temperature and high-pressure. It is well known that domestic thermal power plants have been in use over 100000 h which means that significant cost is required not only for maintenance, but often for renewal of equipment. Based on comprehensive investigation, the results of residual life assessment of one high pressure steam turbine casing, which belongs to the older turbine generation, taking into account simultaneous action of thermal fatigue and creep, are presented in this paper. Also, the critical flaw crack size of HP turbine casing is determined because this parameter has a strong influence on casing integrity and residual life. The results of residual life assessment provide not only a basis for further maintenance, but also estimated time for reparation or renewal. PB - Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd T2 - Thermal Science T1 - Remaining life assessment of a high pressure turbine casing in creep and low cycle service regime EP - S138 SP - S127 VL - 18 DO - 10.2298/TSCI121219179B ER -
@article{ author = "Bakić, Gordana and Šijački-Žeravčić, Vera and Đukić, Miloš and Rajičić, Bratislav and Tasić, Marko M.", year = "2014", abstract = "Thick walled components such as high pressure (HP) steam turbine casings operating under high parameter conditions are subjected to a complex stress state. As a result of that stress state, some parts of HP turbine casing undergo to the creep fatigue caused by the combination of thermal fatigue resulted from repeated start/stop operation and the creep which occurs during long-term operation at high temperature and high-pressure. It is well known that domestic thermal power plants have been in use over 100000 h which means that significant cost is required not only for maintenance, but often for renewal of equipment. Based on comprehensive investigation, the results of residual life assessment of one high pressure steam turbine casing, which belongs to the older turbine generation, taking into account simultaneous action of thermal fatigue and creep, are presented in this paper. Also, the critical flaw crack size of HP turbine casing is determined because this parameter has a strong influence on casing integrity and residual life. The results of residual life assessment provide not only a basis for further maintenance, but also estimated time for reparation or renewal.", publisher = "Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd", journal = "Thermal Science", title = "Remaining life assessment of a high pressure turbine casing in creep and low cycle service regime", pages = "S138-S127", volume = "18", doi = "10.2298/TSCI121219179B" }
Bakić, G., Šijački-Žeravčić, V., Đukić, M., Rajičić, B.,& Tasić, M. M.. (2014). Remaining life assessment of a high pressure turbine casing in creep and low cycle service regime. in Thermal Science Univerzitet u Beogradu - Institut za nuklearne nauke Vinča, Beograd., 18, S127-S138. https://doi.org/10.2298/TSCI121219179B
Bakić G, Šijački-Žeravčić V, Đukić M, Rajičić B, Tasić MM. Remaining life assessment of a high pressure turbine casing in creep and low cycle service regime. in Thermal Science. 2014;18:S127-S138. doi:10.2298/TSCI121219179B .
Bakić, Gordana, Šijački-Žeravčić, Vera, Đukić, Miloš, Rajičić, Bratislav, Tasić, Marko M., "Remaining life assessment of a high pressure turbine casing in creep and low cycle service regime" in Thermal Science, 18 (2014):S127-S138, https://doi.org/10.2298/TSCI121219179B . .