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    • 1. 发明申请
    • SYSTEM AND METHOD FOR LIQUEFYING NATURAL GAS USING SINGLE MIXED REFRIGERANT AS REFRIGERATION MEDIUM
    • 使用单一混合制冷剂作为制冷剂液化天然气的系统和方法
    • US20140283548A1
    • 2014-09-25
    • US14354964
    • 2012-09-13
    • Zhenyong HeLong YuSheng ZhangJianqing FuXiaozhe Zhang
    • Zhenyong HeLong YuSheng ZhangJianqing FuXiaozhe Zhang
    • F25J1/00
    • F25J1/0022F25J1/0055F25J1/0212F25J1/0291F25J2220/64
    • A system and a method for liquefying natural gas using single mixed refrigerant as refrigeration medium are provided. The system comprises a two-stage mixed refrigerant compressor (1) driven by a motor, two coolers (21, 22), a liquid pump (4), three gas-liquid separators (31, 32, and 6), two throttling devices (51, 52), a plate-fin heat exchanger group (7) and a LNG storage tank (8). The method comprises the following steps: the mixed refrigerant is compressed step by step by using the two-stage mixed refrigerant compressor (1), separated step by step, and gas-phase and liquid phase mixed refrigerant streams obtained from the separation flow into different passages of the heat exchanger group (7) respectively for throttling and heat exchanging. Heat exchange curves of cold fluid and hot fluid in the whole heat exchange process match with each other better by using two-stage heat exchange, thereby flow of the mixed refrigerant is reduced effectively.
    • 提供了使用单一混合制冷剂作为制冷介质液化天然气的系统和方法。 该系统包括由电动机驱动的两级混合制冷剂压缩机(1),两个冷却器(21,22),液体泵(4),三个气液分离器(31,32和6),两个节流装置 (51,52),板翅式热交换器组(7)和LNG储罐(8)。 该方法包括以下步骤:使用两级混合制冷剂压缩机(1)逐步压缩混合制冷剂,将从分离流获得的气相和液相混合制冷剂流分离成不同的 热交换器组(7)的通道分别用于节流和热交换。 整个热交换过程中的冷流体和热流体的热交换曲线通过两级热交换更好地相互匹配,从而有效地降低混合制冷剂的流动。
    • 7. 发明申请
    • Polarization Maintaining Optical Fiber Polarizer
    • 偏振维护光纤偏振器
    • US20110002579A1
    • 2011-01-06
    • US12642603
    • 2009-12-18
    • Sheng ZhangVictor Il'ich Kopp
    • Sheng ZhangVictor Il'ich Kopp
    • G02B6/024
    • G02B6/2726
    • A novel in-fiber polarizer is provided that is implemented in an optical fiber structure based on a polarization maintaining (“PM”) optical fiber, and that is configured to impart a predetermined desired polarization to a light signal transmission of a predetermined at least one wavelength transmitted therethrough. The inventive polarizer comprises a PM optical fiber structure, with an entry end for receiving incident light and an exit end for outputting polarized light, having an optical fiber core, having at least one core mode and a core propagation constant, surrounded by a cladding, having at least one cladding mode and a cladding propagation constant, that further comprises a reduced core diameter region of a predetermined length between its entry and exit ends, wherein various predefined parameters of the modified PM optical fiber structure, including but not being limited to, the core and cladding propagation constants, the value of the reduced core diameter, and the length of the reduced core diameter region are selected and configured to produce a constructive interference for one light polarization of the input light signal, corresponding to the desired polarization, and to produce a destructive interference for a polarization orthogonal to the desired polarization, to thereby only output, at the polarizer exit end, the desired polarization component of the light signal transmission at the at least one wavelength. Additional embodiments of the inventive polarizer include multiple sequential polarizer structures with specially configured interconnects.
    • 提供一种新颖的光纤偏振器,其以基于偏振维持(“PM”)光纤的光纤结构实现,并且被配置为将预定的所需偏振赋予预定的至少一个的光信号传输 波长传输通过。 本发明的偏振器包括PM光纤结构,具有用于接收入射光的入射端和用于输出偏振光的出射端,具有光纤芯,具有由包层围绕的至少一个核心模式和核心传播常数, 具有至少一个包层模式和包层传播常数,其还包括在其入口端和出口端之间具有预定长度的减小的芯直径区域,其中修改的PM光纤结构的各种预定参数包括但不限于, 核心和包层传播常数,减小的芯直径的值和减小的芯直径区域的长度被选择和配置为对应于期望的极化的输入光信号的一个光偏振产生相长的干涉,以及 以产生与期望的极化正交的偏振的相消干涉,从而仅仅出来 在偏振器出射端处,将至少一个波长的光信号传输的期望的偏振分量放入。 本发明的偏振器的另外的实施例包括具有特别配置的互连的多个顺序偏振器结构。