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Research Papers: Design and Analysis

Computation of Working Life Consumption of a Steam Turbine Rotor

[+] Author and Article Information
Dejan Mitrović

Faculty of Mechanical Engineering, University of Nis Serbia, 14 Aleksandra Medvedeva Street, 18000 Nis, Serbiamitrod@masfak.ni.ac.rs

Dragoljub Zivkovic

Faculty of Mechanical Engineering, University of Nis Serbia, 14 Aleksandra Medvedeva Street, 18000 Nis, Serbiadzivkovic@masfak.ni.ac.rs

J. Pressure Vessel Technol 132(2), 021202 (Jan 19, 2010) (6 pages) doi:10.1115/1.4000512 History: Received March 13, 2009; Revised July 17, 2009; Published January 19, 2010; Online January 19, 2010

Fatigue is one of the most important aging effects of power plant components. Information about fatigue helps in assessing structural degradation of the component and so assists in planning in-service inspection and maintenance. In this paper, we present a computation method that can be used to estimate the working life consumption of a steam turbine rotor. In the method, creep and low cycle material damage were considered. The calculations are based on the Palmgren–Miner hypothesis of linear damage accumulation. The computation was done utilizing the Microsoft Excel software package and the VISUAL BASIC for application programming language. As a reference, we used the MAN-339 MW steam turbine installed in the “Kosovo-B” power plant station in Obilic. This method can be implemented to other parts of the power plant that will result in better organization of the maintenance and ultimate enhancement of the reliability and availability of the plant.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 4

Working life consumption model in the stationary work

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Figure 5

Working life consumption model in the nonstationary work

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Figure 3

Normal distribution of the parameter

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Figure 2

Schematic layout of a rotor as ideal body

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Figure 1

Stress-rupture strength for heat-resisting steels

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