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首页> 外文会议>Eighth European Congress on Fluid Machinery for Oil, Gas, and Petrochemical Industry Oct 31-Nov 1, 2002 The Hague, The Netherlands >Exducer turbines, the optimized solution for liquefied gas expanders
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Exducer turbines, the optimized solution for liquefied gas expanders

机译：汽轮机，液化气膨胀机的最佳解决方案

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摘要

The liquefaction process for natural gas requires LNG expanders with flexible operation regarding mass flow and differential pressure. The first pilot expanders were installed in Malaysia and were designed as hydraulic turbines with variable inlet guide vanes and air-cooled generators. Sealing problems, low reliability and hydraulic efficiency losses due to guide vane clearances resulted in the development of a completely different generation. The second generation of LNG expanders, designed as a variable speed cryogenic turbine generator, eliminates the variable guide vane losses, but requires step-down and step-up transformers and electronic frequency converters. For power generation in the range above 1.5 MW electronic frequency converters are less economical and constant speed cryogenic submerged turbine generators are the preferred solution. LNG expanders require a design that permits the turbine generators to adjust their operation according to a variety of input parameters. The new and advanced LNG expanders use variable pitch Exducer Turbines operating at constant speed thus eliminating expensive transformers and frequency converters and increasing the total power output. Design and performance of the Exducer Turbine, the third generation of LNG expanders, is presented and compared with conventional variable speed cryogenic turbines. Exducer Turbines are the optimised solution for all applications in new liquefaction plants of any size and process, in floating LNG production units, for de-bottlenecking of existing LNG plants, and for two-phase expansion in specialized processes with partial LNG vaporisation.
机译：天然气的液化过程要求液化天然气膨胀机在质量流量和压差方面具有灵活的操作。首批先导式膨胀机安装在马来西亚，被设计为带有可变进口导向叶片和风冷发电机的水轮机。由于导向叶片间隙而导致的密封问题，低可靠性和液压效率损失导致了完全不同的一代的发展。设计为变速低温涡轮发电机的第二代LNG膨胀机消除了可变的导向叶片损耗，但需要降压和升压变压器以及电子变频器。对于超过1.5兆瓦范围内的发电来说，电子变频器的经济性较低，恒速深埋式涡轮发电机是首选解决方案。 LNG膨胀机需要一种允许涡轮发电机根据各种输入参数调节其运行的设计。新型先进的LNG膨胀机使用可变螺距的Exducer涡轮机，该涡轮机以恒定速度运行，因此省去了昂贵的变压器和变频器，并增加了总功率输出。介绍了第三代LNG膨胀机Exducer Turbine的设计和性能，并将其与常规变速低温涡轮机进行了比较。 Exducer Turbines是针对各种规模和工艺的新液化工厂，浮动LNG生产单元中的所有应用，现有LNG工厂的瓶颈消除以及在部分LNG汽化的特殊工艺中进行两相膨胀的优化解决方案。

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