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.

Issue Section:
Design and Analysis
Keywords:
ageing, creep fracture, fatigue, inspection, maintenance engineering, mechanical engineering computing, planning, reliability, rotors, steam turbines, Visual BASIC, creep-fatigue, low cycle fatigue, damage, steam turbine rotor
Topics:
Damage, Rotors, Steam turbines, Stress, Fatigue, Creep, Computation
1.
Rusin
,
A.
, 1992, “
Numerical Simulation of Turbine Valve Creep
,”
Arch. Appl. Mech.
0939-1533,
62
, pp.
386
–
393
.
Crossref
Search ADS
 
2.
JianPing
,
J.
,
Guang
,
M.
,
Yi
,
S.
,
SongBo
,
X.
, 2003, “
An Effective Continuum Damage Mechanics Model for Creep-Fatigue Life Assessment of a Steam Turbine Rotor
,”
Int. J. Pressure Vessels Piping
0308-0161,
80
, pp.
389
–
396
.
Crossref
Search ADS
 
3.
Hohn
,
A.
, 1976, “
The Useful Life of Steam Turbine Parts
,” Brown Boveri Review, No. 2.
4.
Singh
,
M. P.
,
Thakur
,
B. K.
, and
Sullivan
,
W. E.
, 2005, “
Assessing Useful Life of Turbomachinery Components
,”
Proceedings of the 34th Turbomachinery Symposium
, pp.
177
–
192
.
5.
Traupel
,
W.
, 1960,
Termische Turbomschinen, Zweiter Band-regelverhalten, Festigkeit und dynamische Probleme
,
Springer-Verlag
,
Berlin
.
6.
Plotkin
,
E. R.
,
Leizerovich
,
A. Sh.
, and
Muratova
,
I. V.
, 1971, “
Issljedovanie uslovij teploobmena v turbine K 200–130
,”
Teploenergetika (Moscow, Russ. Fed.)
0040-3636,
18
(
5
), pp.
41
–
45
.
7.
Zisina-Moložen
,
L. M.
,
Zisin
,
L. V.
, and
Poljak
,
M. P.
, 1974, “
Teploobmen v turbomašinah
,” Leningrad, Mašinostroenie.
8.
Lindner
,
H.
, 1977, “
Berechung des Erchopfungsgrades fon kesselteilen mit hilfe statistischer answertungs methoden
,”
VGB
(Verband der Grosskraftwerks Betreiber ab.), Kraftwerkstechnik Heft
1
.
9.
The thermal power plant “Kosovo-B” in Obilic, Technical documentation.
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 by American Society of Mechanical Engineers
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