Reliability Evaluation of Heat Recovery Steam Generator of Combined Cycle Thermal Power Plants

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Khaksar Haghani Dehkordi, Siamak | 2012

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 43096 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Saeedi, Mohammad Hassan; Kazemzadeh Hannani, Siamak
Abstract:
Combined cycle power plants consist of three main sections, namely gas turbine, Heat Recovery Steam Generator (HRSG) and steam turbine. Occurring failure in HRSG causes the steam turbine trip, so the reliability assessment of HRSG has a great importance for forecasting the probability of occurring failure and also reducing failure causes. In this project, the reliability of HRSG considering effects of aging phenomenon, maintenance and, environmental and operational conditions on reliability is modeled. Afterward a method to estimate the model parameters is introduced. Using present method, failure data of six HRSGs of a plant each with a capacity of 50 MW is analyzed and the model parameters are calculated. The HRSG failure causes are discussed. The behavior of HRSG reliability related functions is studied under different conditions. Using present method one can evaluate reliability of a power system in different conditions. Results show that maintenance operations have a great effect on the reliability of HRSGs
Keywords:
Reliability ; Aging ; Maintenance ; Heat Recovery Steam Generator ; Operating Condition ; Environmental Condition

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