scholarly journals Estimation method of thermal fatigue life consumption for boiler water wall tubes of thermal power plants

2018 ◽  
Vol 84 (859) ◽  
pp. 17-00397-17-00397
Author(s):  
Masahide YOSHIDA ◽  
Masahiko MORINAGA ◽  
Terutaka FUJIOKA
Keyword(s):  
Fatigue Life ◽  
Thermal Fatigue ◽  
Power Plants ◽  
Thermal Power ◽  
Estimation Method ◽  
Thermal Power Plants ◽  
Boiler Water ◽  
Water Wall ◽  
Thermal Fatigue Life ◽  
Life Consumption

Multi criteria FMECA for coal-fired thermal power plants using COPRAS-G

2014 ◽  
Vol 31 (5) ◽  
pp. 601-614 ◽  
Author(s):  
Debasis Das Adhikary ◽  
Goutam Kumar Bose ◽  
Dipankar Bose ◽  
Souren Mitra
Keyword(s):  
Failure Mode ◽  
Power Plants ◽  
Failure Modes ◽  
Thermal Power ◽  
Uncertain Data ◽  
Estimation Method ◽  
Straight Tube ◽  
Thermal Power Plants ◽  
Content Type ◽  
Criticality Analysis

Purpose – The purpose of this paper is to present a multi criterion failure mode effect and criticality analysis for coal-fired thermal power plants using uncertain data as well as substituting the traditional risk priority number estimation method. Design/methodology/approach – Grey-complex proportional assessment (COPRAS-G) method, a multi criteria decision making tool is applied to evaluate the criticalities of the failure modes (alternatives). In this model the criteria (criticality factor) against each alternative are expressed in grey number instead of crisp values. Findings – Rupture failure of the straight tube of economizer (ECO) due to erosion is the highest critical failure mode whereas rupture failure of the stub of ECO due to welding defect is the lowest critical failure mode. Originality/value – This paper incorporates human and environmental factors as additional factors which also influence the failure modes significantly. The COPRAS-G method is modified according this problem. Uncertainty in the scoring of criticality factors against each failure mode by various maintenance personnel is expressed in grey numbers.

Sign in / Sign up

Export Citation Format

Share Document