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首页> 外文会议>ASME(American Society of Mechanical Engineers) Turbo Expo vol.4; 20060506-11; Barcelona(ES) >GAS TURBINE INLET FOGGING SYSTEM TUNING - OPERATOR POINT OF VIEW
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GAS TURBINE INLET FOGGING SYSTEM TUNING - OPERATOR POINT OF VIEW

机译：燃气轮机进气雾化系统调整-操作员视角

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摘要

High-pressure water fogging is a relatively new technique for gas turbine inlet air cooling. Nevertheless, up to now, several hundreds of fogging systems have been installed around the world and this figure is rapidly growing. A large number of the fogging installations provided sufficient experience to establish a general approach to design, operation and maintenance of such systems. However, a fogging system could require some tuning to a specific gas turbine configuration and site conditions. Israel Electric Corporation (IEC) has implemented fourteen fogging systems on 120-150 MW gas turbines, and each system was tuned to provide higher effectiveness. Several systems were basically modified in order to reduce the risk of compressor blade erosion. Subsequent field tests had shown that the goals of the system modification and tuning were successfully achieved. This allowed extending operational hours of the fogging systems and provided noticeable fuel savings. Moreover, during the summer 2005 the fogging systems helped to achieve the all-time high peak of electricity demand. Extended use of the fogging systems features a prolonged operation at partial cooling capacity and at varying ambient temperature, pressure and humidity. This required a thorough evaluation of the fogging systems performance, in order to provide the systems settings that would allow the most effective operation with minimal risk of damage to gas turbine components, mainly the compressor blades. The paper describes an approach and results of the fogging system performance evaluation at the different operational conditions. The method allows for the rate of compressor airflow as a function of the injected water flow rate as well as of ambient pressure, temperature and humidity. Actual operational limitations are also considered. The results are illustrated with the examples that correspond to real fogging systems operating under Israeli weather conditions. The method is general and, therefore, is applicable to other weather conditions and for different fogging systems.
机译：高压水雾化是用于燃气轮机进气冷却的一种相对较新的技术。然而，到目前为止，全世界已经安装了数百个雾化系统，并且这个数字正在迅速增长。大量的雾化设备提供了足够的经验，可以建立一种设计，操作和维护此类系统的通用方法。但是，雾化系统可能需要对特定的燃气轮机配置和现场条件进行一些调整。以色列电力公司（IEC）已在120-150 MW燃气轮机上实施了十四个雾化系统，并且每种系统都进行了调整，以提供更高的效率。为了减少压缩机叶片腐蚀的风险，对几个系统进行了基本修改。随后的现场测试表明，系统修改和调整的目标已成功实现。这样可以延长雾化系统的运行时间，并节省大量燃料。此外，在2005年夏季，喷雾系统帮助实现了有史以来最高的用电高峰。长时间使用雾化系统可在部分制冷量以及变化的环境温度，压力和湿度下延长运行时间。这就需要对起雾系统的性能进行全面的评估，以便提供能够在不损坏燃气轮机部件（主要是压缩机叶片）的风险最小的情况下实现最有效运行的系统设置。本文介绍了在不同运行条件下进行雾化系统性能评估的方法和结果。该方法允许压缩机空气流量与注入水流量以及环境压力，温度和湿度有关。还考虑了实际的操作限制。用与在以色列天气条件下运行的实际雾化系统相对应的示例说明了结果。该方法是通用的，因此适用于其他天气条件和不同的雾化系统。

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