Academic Journal
Re-Extension of 200 MW Turbine Cast Casing Service
| Τίτλος: | Re-Extension of 200 MW Turbine Cast Casing Service |
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| Συγγραφείς: | Olga Chernousenko, Dmitriy Ryndyuk, Vitaliy Peshko |
| Πηγή: | Journal of Mechanical Engineering, Vol 22, Iss 2, Pp 14-20 (2019) Journal of Mechanical Engineering; Том 22, № 2 (2019); 14-20 Проблемы машиностроения; Том 22, № 2 (2019); 14-20 Проблеми машинобудування; Том 22, № 2 (2019); 14-20 |
| Στοιχεία εκδότη: | National Academy of Sciences of Ukraine (Co. LTD Ukrinformnauka) (Publications), 2019. |
| Έτος έκδοσης: | 2019 |
| Θεματικοί όροι: | residual life, УДК 621.165.62-192, Power engineering, steam turbine, intermediate- pressure cylinder casing, long-term strength, 02 engineering and technology, 7. Clean energy, 01 natural sciences, high-pressure cylinder casing, UDC 621.165.62-192, low-cycle fatigue, 0103 physical sciences, TJ1-1570, парова турбіна, корпус високого тиску, корпус середнього тиску, пошкодженість, запас міцності, малоциклова втома, тривала міцність, залишковий ресурс, intermediate-pressure cylinder casing, damage, safety factor, паровая турбина, корпус высокого давления, корпус среднего давления, поврежденность, запас прочности, малоцикловая усталость, длительная прочность, остаточный ресурс, Mechanical engineering and machinery, 0210 nano-technology |
| Περιγραφή: | To date, the fleet service life of a significant number of DTEK Energy power units is ex-ceeded. In particular, this relates to the structural components of the K-200-130-3 steam turbine of the power unit No. 9 of DTEK Luganskaya TPP. There is a need to make a decision on the admissibility of further exploitation. This requires a comprehensive study of the technological state of the base metal and the check calculation of its most critical high-temperature elements. A complex of such works was performed earlier in 2009. A special feature of re-extending the service life of this power unit is the super long fleet equipment operating time, presence of damages in the form of cracks and crack surfaces in the high- and intermediate-pressure cylinder casings, as well as the active involvement of equipment to operate in maneuverable modes when covering peaks of electrical load. This paper assesses the residual life of casings on the basis of three-dimensional models of the K-200-130-3 steam turbine high-pressure (HP) and intermediate- pressure (IP) cylinder casings. In doing so, the paper takes into account the actual operating conditions according to the damage data obtained from the results of inspecting the power equip-ment metal condition during preventive maintenance overhauls. The calculation of tem-perature fields is performed for typical operation modes, namely stationary operation at nominal power and starts from cold, warm, and hot states. The boundary value problem of heat conduction was solved using the finite element method of computational domain discretization. The calculation of the stress-strain state (SSS) was made taking into ac-count the effects of the main types of forces − temperature stresses, uneven temperature fields, forces from the steam atmosphere pressure, supporting forces. The maximum stress intensities for all the investigated modes of operation are observed in the toroidal parts of cylinder casings in the region of steam admission and correspond to the crack formation zones that were determined during the non-destructive testing of the metal. The assess-ment of long-term strength and low-cycle fatigue resistance showed that the residual life of the high-pressure cylinder (HPC) casing is satisfactory, and allows extending the op-eration by 100 thousand hours with standard safety factors. For the intermediate-pressure cylinder (IPC) casing, the residual life is 50 thousand hours with reduced safety factors. |
| Τύπος εγγράφου: | Article |
| Περιγραφή αρχείου: | application/pdf |
| ISSN: | 2411-0779 0131-2928 |
| DOI: | 10.15407/pmach2019.02.014 |
| Σύνδεσμος πρόσβασης: | https://doaj.org/article/64d86a2de1974ca2b6b4bcf50e438481 http://dspace.nbuv.gov.ua/handle/123456789/158846 http://journals.uran.ua/jme/article/view/170923 |
| Rights: | CC BY CC BY ND |
| Αριθμός Καταχώρησης: | edsair.doi.dedup.....cc4b6ac80b83c827981aa8cf416e1a35 |
| Βάση Δεδομένων: | OpenAIRE |
| ISSN: | 24110779 01312928 |
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| DOI: | 10.15407/pmach2019.02.014 |