DETERMINING RELIABILITY FUNCTIONS OF STEAM TURBINE IN POWER PLANT ‘NIKOLA TESLA, BLOCK A4’
Dragan Kalaba1, Milan Đorđević1, Snežana Kirin2, Cristian Delamarian3
1)University of Priština, Faculty of Technical Sciences, Kosovska Mitrovica, Serbia,
2)University of Belgrade, Innovation Centre of the Faculty of Mechanical Engineering, Belgrade, Serbia
3)TÜV SÜD, Romania
Determination of reliability indicators of steam turbine system in the thermal power plant ‘Nikola Tesla, Block A4’ during useful life period is based on a ten-year operational database. By implementation of mathematical theory of reliability to exploitation research data and using simple and complex two-parameter Weibull distribution, the theoretical reliability functions of the considered system are determined. The graphical method is applied to quantitatively determine reliability indicators. Obtained probabilistic laws of failure density and failure rate, according to which the random variable behaves, do not coincide completely with empirical distributions, regardless of whether the theoretical functions are obtained by simple or complex Weibull distribution.
Keywords: steam turbine, reliability, Weibull distribution