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Life managment method for high-temperature gas turbine part and computer programme for realizing same

A technology for high temperature components and gas turbines, applied in gas turbine installations, engine components, machines/engines, etc., to solve problems such as unpredictable cracks and crack growth rates

Inactive Publication Date: 2004-04-14
MITSUBISHI HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Cracks and crack growth rates cannot currently be predicted from plant-specific load cycles using existing methods

Method used

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  • Life managment method for high-temperature gas turbine part and computer programme for realizing same
  • Life managment method for high-temperature gas turbine part and computer programme for realizing same
  • Life managment method for high-temperature gas turbine part and computer programme for realizing same

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Embodiment Construction

[0019] An embodiment of the method of the present invention for managing the life of high temperature components of a gas turbine and its implementation by a computer program will now be described with reference to the accompanying drawings. It should be understood that this description does not limit the invention in any way.

[0020] Note that the term "high temperature component" in the present invention refers specifically to the combined parts of the gas turbine exposed to high temperature environments, such as turbine rotating blades, turbine stationary blades, and combustor components. In addition, the term "operating cycle" in the present invention refers to the sum of the number of starts and the number of trips (that is, sudden engine stop) for operating the gas turbine. The more engine starts and trips, the higher the fatigue levels in the hot parts, even for the same run time as a gas turbine with fewer trips. In other words, a larger portion of the component's li...

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Abstract

It provides a method for managing the remaining life of a high temperature component used in a gas turbine that enables a state of fatigue of a high temperature component to be evaluated and controlled with a high level of accuracy, and a program medium for performing the method for managing the remaining life of a high temperature gas turbine component on a computer. In the method for managing the lifespan of a high temperature component used in a gas turbine, the lifespan of a high temperature component being evaluated is set within an operating area bounded by a component life limit line that is determined on the basis of field data giving the correlation between the operating time and operating cycles for the state of fatigue from past high temperature components. As the program medium, a medium is employed that is provided with a program in which this method is used for managing a lifespan of a high temperature component used in a gas turbine.

Description

technical field [0001] The present invention relates to a method of managing the life of large industrial gas turbine components exposed to high gas temperatures. Depending on the nature of plant operating conditions, the mechanical properties of superalloy materials are typically used on components that are primarily subject to a combination of oxidation, creep and fatigue. Due to the difficulty in quantifying the non-linear interactions between the above mechanisms, industry has had to rely on empirical design criteria for estimating remaining life and performing intermediate maintenance or refurbishment operations. The new method proposed by the present invention can predict cracks and crack growth rate according to the operating conditions of each power plant. Likewise, the new method can estimate the operating cycle time to reach the maintenance limit based on the operating duty cycle of each plant. Background technique [0002] Depending on the type of actual plant o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D25/00F02C7/00F02C9/00
CPCF05D2270/11F02C9/00F05D2260/80
Inventor 富田康意桑原正光正田淳一郎弗里德里希·泽希延维诺德·卡利安坡尔李晙熙
Owner MITSUBISHI HEAVY IND LTD
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