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    • 9. 发明授权
    • Compressor drive system for a natural gas liquefaction plant having an
electric motor generator to feed excess power to the main power source
    • 一种用于天然气液化装置的压缩机驱动系统,其具有电动发电机以向主电源供给过量电力
    • US5689141A
    • 1997-11-18
    • US458322
    • 1995-06-06
    • Yoshitsugi KikkawaOsamu YamamotoYasuhiro NaitoJunichi Sakaguchi
    • Yoshitsugi KikkawaOsamu YamamotoYasuhiro NaitoJunichi Sakaguchi
    • F25B11/02F01D15/10F25B7/00F25B11/00F25J1/02F25J3/04F02C6/00F25J3/00
    • F01D15/10F25B11/00F25B7/00F25J1/0022F25J1/0052F25J1/0055F25J1/0216F25J1/0247F25J1/0283F25J1/0287F25J1/0292F25J1/0298F25J2220/64F25J2280/10
    • In a compressor drive system for a natural gas liquefaction plant including a plurality of gas turbines each provided in an individual refrigeration cycle for pressurizing a different refrigerant, an electric motor is provided for each of the gas turbines so as to serve both as an auxiliary electric motor for generating a startup torque and as an AC generator, and the excess output power of the gas turbine is converted into electric power by this electric motor when the power requirement of the associated compressor is less than the power output of the gas turbine. Additionally, at least two of the gas turbines are of an identical make which is suitable for driving the compressor of one of the associated refrigeration cycles requiring a larger driving power. Therefore, the gas turbines can be operated at optimum conditions at all times without regard to seasonal changes of the operating conditions, and the efficient operation of the gas turbines will result in a significant reduction in the operation costs through a substantial saving of fuel consumption. Moreover, any excess power output of one of the gas turbines can be allocated so as to reduce the burden of the in-plant power station and/or to supplement the shortage of the power output of the other gas turbine, and the management of the stand-by units and spare parts can be simplified. These factors have a compounded effect in reducing the investment costs of the plant.
    • 在包括多个燃气轮机的天然气液化装置的压缩机驱动系统中,每个燃气轮机分别设置在用于对不同制冷剂进行加压的个别制冷循环中,为每个燃气轮机设置电动马达,以作为辅助电动机 用于产生起动转矩的电动机和作为交流发电机的电动机,并且当相关联的压缩机的功率需求小于燃气轮机的功率输出时,燃气轮机的过量输出功率被该电动机转换成电力。 此外,至少两个燃气涡轮机具有相同的功能,其适合于驱动相关制冷循环中的一个的压缩机,需要更大的驱动功率。 因此,燃气轮机可以始终在最佳条件下运行,而不考虑运行条件的季节性变化,燃气轮机的有效运行将大大节省燃料消耗,从而显着降低运行成本。 此外,可以分配一个燃气轮机的任何多余的功率输出,以便减少工厂内电站的负担和/或补充另一燃气轮机的功率输出的不足,以及管理 备用单元和备件可以简化。 这些因素在降低工厂的投资成本方面具有复合效应。