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首页> 外文会议>Asia's Largest Power Generation Conference and Exhibition Vol.2, Sep 22-24, 1999, Singapore >Life Extension Strategy for Heavy-Duty Gas Turbines after Long Operating Periods
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Life Extension Strategy for Heavy-Duty Gas Turbines after Long Operating Periods

机译：长期运行后重型燃气轮机的寿命延长策略

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Gas turbine and GUD(~R) power plants are typically designed for a useful service life of over 30 years. Essential components of SIEMENS gas turbines ― these include turbine blades and the hot-gas-path-casings ― are designed for a service life of 100,000 equivalent operating hours. If operated at base load, the hot-gas-path parts of this type of gas turbine, for example in a GUD(~R) combined-cycle power plant, would reach the end of their useful service life after only 10 to 12 years. This is well before the end overall plant service life defined in the power plant concept. Such plant applications therefore necessitate life extension measures enabling to continuing operation beyond 100,000 equivalent operating hours. In more concrete terms, this concept encompasses maintaining the original output and efficiency levels. It does, however, offer the option of implementing measures to increase power output and efficiency. This contribution gives a detailed presentation of the strategy of service life extension measures based not only on the design criteria but also operating experience gathered with SIEMENS V94.2 gas turbines. Focal points include the strategy for hot-gas-path components in the form of detailed materials investigations into the residual service life of components such as turbine blades which have been subjected to long-term operation. Evaluation criteria for the remaining gas turbine components such as the compressor blading, rotor and pressure-tight casings are also presented. The concept for service life extension measures after 100,000 equivalent operating hours was developed for implementation during a scheduled major inspection and overhaul. It is possible to calculate the impact of life extension measures on power generation costs over the plant's entire service life on this basis.
机译：燃气轮机和GUD（〜R）发电厂的设计使用寿命通常为30年以上。西门子燃气轮机的基本组件（包括涡轮机叶片和热气路径壳体）的使用寿命设计为100,000个等效工作小时。如果在基本负载下运行，这种燃气轮机的热气路径部件（例如在GUD（〜R）联合循环发电厂中）将在仅10至12年后达到其使用寿命的终点。 。这早于电厂概念中定义的最终电厂总体使用寿命。因此，在此类工厂应用中，必须采取延长寿命的措施，以便能够连续运行超过100,000个等效运行小时。更具体地讲，该概念包括保持原始的输出和效率水平。但是，它确实提供了实施措施以增加功率输出和效率的选择。该贡献不仅基于设计标准，而且还利用SIEMENS V94.2燃气轮机的运行经验详细介绍了延长使用寿命的策略。重点包括采取热气路径部件的策略，以详细的材料形式调查已长期运行的部件（例如涡轮叶片）的剩余使用寿命。还介绍了其余燃气轮机部件（例如压缩机叶片，转子和压力密封外壳）的评估标准。提出了在100,000个等效工作小时后延长使用寿命的措施的概念，以便在计划的大型检查和大修期间实施。在此基础上，可以计算出延长寿命的措施对电厂整个使用寿命内发电成本的影响。

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