TS-98 Operating Experience and Lifetime Assessment of 69MW Gas Turbine Power Plant in Fuji Gas Turbine Research Center(Session D-5 Maintenance and Control 2)

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Most newly built fossil fuel power plants are considered to be combined cycle power plants because of their superior suitability for the environment such as low emission and high efficiency. Preventive maintenance based on residual life assessment and refurbishment should be carried out in order to perform high availability plant operation. In service, hot gas path parts within gas turbine, such as combustors, vanes and blades, decrease their life because they are exposed particularly severe conditions caused by high inlet turbine temperature, the frequent startup and shutdown operation, steady-state thermal stresses by blade cooling. Therefore it is necessary to periodically carry out dismantling inspection and to evaluate the material degradation. Fuji has been developing residual life assessment methods for hot gas path parts. This assessment method can be realized with the aid of material destructive test, non-destructive inspection and statistical analysis of field machine. At first, we try to evaluate operated 1^<st> stage turbine blades that are removed from our 69MW gas turbine facility in every dismantling inspection. The facility was constructed in Fuji Electric Kawasaki Factory using Siemens V64.3 gas turbine and its commercial operation started in December 1993. This paper also describes operating experience and result of dismantling inspection for our gas turbine facility, in addition to the evaluated result of residual life assessment for first stage turbine blades.
社団法人日本ガスタービン学会の論文
1999-11-14

TS-98 Operating Experience and Lifetime Assessment of 69MW Gas Turbine Power Plant in Fuji Gas Turbine Research Center(Session D-5 Maintenance and Control 2)

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