Arrangement for Liquefying Natural Gas and Method for Starting Said Arrangement
    4.
    发明申请
    Arrangement for Liquefying Natural Gas and Method for Starting Said Arrangement 有权
    液化天然气的安排和启动所述安排的方法

    公开(公告)号:US20120131950A1

    公开(公告)日:2012-05-31

    申请号:US13375821

    申请日:2010-06-01

    IPC分类号: F25J1/00 H02K7/18

    摘要: An arrangement for liquefying natural gas is provided. The arrangement includes a gas turbine unit that includes a gas turbine compressor, a steam turbine unit, a first compressor unit, a shiftable clutch, a heated steam generator for supplying steam to the steam turbine unit, and a second compressor unit. The steam turbine unit and the first compressor unit have a common, rigidly connected first shaft assembly, while the gas turbine unit and the second compressor unit have a common, rigidly connected second shaft assembly. In order to increase economic efficiency, the first shaft assembly and the second shaft assembly are operable to be connected to and disconnected from each other using the clutch. A suitable method for starting said arrangement is also provided.

    摘要翻译: 提供了一种用于液化天然气的装置。 该装置包括燃气轮机单元,其包括燃气轮机压缩机,蒸汽涡轮机单元,第一压缩机单元,可移动离合器,用于向蒸汽涡轮机单元供应蒸汽的加热蒸汽发生器和第二压缩机单元。 蒸汽轮机单元和第一压缩机单元具有共同的,刚性连接的第一轴组件,而燃气涡轮机单元和第二压缩机单元具有共同的刚性连接的第二轴组件。 为了提高经济效率,第一轴组件和第二轴组件可操作以使用离合器彼此连接和断开。 还提供了用于启动所述布置的合适方法。

    Method for efficient nonsynchronous LNG production
    7.
    发明授权
    Method for efficient nonsynchronous LNG production 有权
    高效非同步LNG生产方法

    公开(公告)号:US07526926B2

    公开(公告)日:2009-05-05

    申请号:US10569785

    申请日:2004-09-20

    摘要: A drive system for a refrigeration compressor such as is used in a natural gas liquefaction plant, allowing the desired compressor speed and maximum turbine efficiency to be maintained throughout varying ambient temperature conditions. A gas turbine is used with an electric starter motor with drive-through capability located on a common drive shaft between the turbine and the compressor. A variable frequency drive (VFD) is connected between the electrical power grid and the electric motor for smooth startups, but also to allow excess turbine mechanical power to be converted to electrical power by the motor operating as a generator, and delivered to the grid at the grid frequency. Pulse width modulation technology may be used to reduce harmonic distortion in the VFD's output. The starter motor also functions as a helper motor when the turbine output is insufficient to drive the compressor at the rotational speed needed to meet throughput requirements.

    摘要翻译: 用于诸如用于天然气液化设备的制冷压缩机的驱动系统,允许在变化的环境温度条件下保持期望的压缩机速度和最大涡轮效率。 燃气轮机与电动起动电动机一起使用,其具有位于涡轮机和压缩机之间的公共驱动轴上的驱动能力。 变频驱动器(VFD)连接在电力电网和电动马达之间以便顺利启动,而且还允许通过作为发电机运行的电动机将多余的涡轮机械功率转换为电力,并将其传送到电网 电网频率。 脉宽调制技术可用于减少VFD输出中的谐波失真。 当涡轮机输出不足以以满足吞吐量要求所需的转速驱动压缩机时,起动马达也用作辅助马达。