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    METHOD OF CONTROL OF THE NATURAL GAS LIQUEFACTION PROCESS
    1.
    发明申请
    METHOD OF CONTROL OF THE NATURAL GAS LIQUEFACTION PROCESS 审中-公开

    公开(公告)号：US20180320958A1

    公开(公告)日：2018-11-08

    申请号：US15970956

    申请日：2018-05-04

    申请人： Sakhalin Energy Investment Company Ltd.

    发明人： Ivan Vladimirovich NEMOV

    IPC分类号： F25J1/02 ,  F25J1/00

    CPC分类号： F25J1/0252 ,  F25J1/0022 ,  F25J1/0092 ,  F25J1/0211 ,  F25J1/0249 ,  F25J1/025 ,  F25J1/0254 ,  F25J2210/60 ,  F25J2270/902 ,  F25J2280/02 ,  F25J2280/50

    摘要： The present invention relates to the control systems of the compression refrigerating machines, namely, to the methods of control of the natural gas liquefaction process to produce liquefied natural gas (LNG), and can be used for liquefaction and cooling of natural gas on the most major technological lines and LNG production plants, working on the mixed refrigerant (MR). The method of control of the natural gas liquefaction process, on the mixed refrigerant-operating LNG production plant comprises a periodic measuring of the current parameters of the said process, and controlling composition of the mixed refrigerant entering the main cryogenic heat exchanger, in order to achieve the optimal process parameters. Carnot factor is used as an optimality criterion for parameters of the process. The mixed refrigerant composition is controlled by direct calculation on the basis of the current process parameters and equation of state (for example, Peng-Robinson equation of state) of the substance amount of the mixed refrigerant components required to obtain in the main cryogenic heat exchanger the temperature profile corresponding to the optimal process parameters, and to introduce the said components into the main cryogenic heat exchanger. The invention improves efficiency of the natural gas liquefaction process and, as a result, minimizes specific compressor power required for LNG production.

    REFRIGERANT SUPPLY TO A COOLING FACILITY
    4.
    发明申请
    REFRIGERANT SUPPLY TO A COOLING FACILITY 审中-公开
    冷冻供应给冷藏设施

    公开(公告)号：US20150253070A1

    公开(公告)日：2015-09-10

    申请号：US14625022

    申请日：2015-02-18

    申请人： CONOCOPHILLIPS COMPANY

    发明人： Paul R. DAVIES ,  James L. HARRIS

    IPC分类号： F25J1/00 ,  F25J1/02 ,  F17C7/02

    CPC分类号： F25J1/0022 ,  F25B45/00 ,  F25J1/004 ,  F25J1/0052 ,  F25J1/0085 ,  F25J1/0087 ,  F25J1/021 ,  F25J1/023 ,  F25J1/0249 ,  F25J1/0283 ,  F25J2220/62 ,  F25J2220/64

    摘要： An embodiment of a method for supplying refrigerants to a liquefied natural gas (LNG) facility includes: advancing a first refrigerant from a first storage device to a heat exchanger, the first refrigerant having a first temperature; advancing a second refrigerant from a second storage device to the heat exchanger, the second refrigerant having a second temperature different than the first temperature; flowing the first refrigerant and the second refrigerant through the heat exchanger; adjusting the second temperature based on at least a transfer of heat between the first refrigerant and the second refrigerant in the heat exchanger; and transferring the first refrigerant and the second refrigerant to the LNG facility.

    摘要翻译： 向液化天然气（LNG）设备供应制冷剂的方法的实施例包括：将第一制冷剂从第一储存装置推进到热交换器，所述第一制冷剂具有第一温度; 将第二制冷剂从第二储存装置推进到热交换器，所述第二制冷剂具有不同于第一温度的第二温度; 使第一制冷剂和第二制冷剂流过热交换器; 至少基于热交换器中的第一制冷剂和第二制冷剂之间的热传递来调节第二温度; 并将第一制冷剂和第二制冷剂输送到LNG设备。

    METHOD AND SYSTEM FOR OPTIMIZED LNG PRODUCTION
    6.
    发明申请
    METHOD AND SYSTEM FOR OPTIMIZED LNG PRODUCTION 有权
    优化液化天然气生产的方法与系统

    公开(公告)号：US20110203312A1

    公开(公告)日：2011-08-25

    申请号：US13061382

    申请日：2009-08-27

    申请人： Arne Jakobsen ,  Carl J. Rummelhoff ,  Bjorn H. Haukedal

    发明人： Arne Jakobsen ,  Carl J. Rummelhoff ,  Bjorn H. Haukedal

    IPC分类号： F25J1/02

    CPC分类号： F25J1/0022 ,  F25J1/0025 ,  F25J1/005 ,  F25J1/0072 ,  F25J1/0204 ,  F25J1/0205 ,  F25J1/0207 ,  F25J1/0249 ,  F25J1/0279 ,  F25J1/0288 ,  F25J1/0298 ,  F25J2270/16 ,  F25J2270/60 ,  F25J2270/902

    摘要： A method and system for producing liquefied and sub-cooled natural gas by means of a refrigeration assembly using a single phase gaseous refrigerant comprising: at least two expanders (1-3); a compressor assembly (5-7); a heat exchanger assembly (8) for heat absorption from natural gas; and a heat rejection assembly (10-12). The novel features according to the present invention are arranging the expanders (1-3) in expander loops; using only one and the same refrigerant in all loops; passing an expanded refrigerant flow from the respective expander into the heat exchanger assembly (8), each being at a mass flow and temperature level adapted to de-superheating, condensation or cooling of dense phase and/or sub-cooling of natural gas; and serving the refrigerant to the respective expander in a compressed flow by means of the compressor assembly having compressors or compressor stages enabling adapted inlet and outlet pressures for the respective expander.

    摘要翻译： 一种通过使用单相气态制冷剂的制冷组件生产液化和次冷天然气的方法和系统，包括：至少两个膨胀器（1-3）; 压缩机组件（5-7）; 用于从天然气吸热的热交换器组件（8）; 和散热组件（10-12）。 根据本发明的新颖特征是将膨胀机（1-3）布置在膨胀机回路中; 在所有回路中只使用同一个制冷剂; 使膨胀的制冷剂流从相应的膨胀器流入热交换器组件（8），每个热交换器组件处于质量流量和温度水平，适合于使天然气的致密相的过热，冷凝或冷却和/或次冷; 并且通过具有压缩机或压缩机级的压缩机组件以压缩流将制冷剂供给到相应的膨胀器，从而使各自的膨胀机具有适合的入口和出口压力。

    SYSTEM PERFORMANCE CORRECTION BY MODIFYING REFRIGERANT COMPOSITION IN A REFRIGERANT SYSTEM
    7.
    发明申请
    SYSTEM PERFORMANCE CORRECTION BY MODIFYING REFRIGERANT COMPOSITION IN A REFRIGERANT SYSTEM 审中-公开
    制冷系统中制冷剂组合物的系统性能校正

    公开(公告)号：US20090165472A1

    公开(公告)日：2009-07-02

    申请号：US12297260

    申请日：2006-04-25

    申请人： Alexander Lifson ,  Michael F. Taras

    发明人： Alexander Lifson ,  Michael F. Taras

    IPC分类号： F25B45/00 ,  F25B1/00

    CPC分类号： C09K5/045 ,  F25B9/006 ,  F25B45/00 ,  F25B2500/18 ,  F25J1/0249

    摘要： An adequate operation and performance of a refrigerant system includes the steps of adding a refrigerant that is different from the original refrigerant, into the refrigerant system should any operational problems be observed during operation of the refrigerant system. As an example, should the refrigerant system be cycling frequently, a lower pressure refrigerant may be added or replace, partially or fully, the refrigerant the system being initially charged with. By making this change, the present invention can, for example, lower the provided system capacity, and hence reduce the amount of cycling. Additionally, conditioned space comfort and system reliability would be improved. Further, changes over time, such as the degradation of the heat exchanger performance, and their negative effect on system operation can be alleviated by such a refrigerant substitution.

    摘要翻译： 如果在制冷剂系统的操作期间观察到任何操作问题，则制冷剂系统的适当操作和性能包括将与原始制冷剂不同的制冷剂加入制冷剂系统的步骤。 作为示例，如果制冷剂系统经常循环，则可以将初始加载的系统的制冷剂部分或全部地添加或更换低压制冷剂。 通过进行这种改变，本发明可以例如降低提供的系统容量，从而减少循环量。 此外，空调舒适性和系统可靠性将得到改善。 此外，通过这种制冷剂替代，可以减轻时间的变化，例如换热器性能的劣化及其对系统运行的负面影响。

    Process for the liquefaction of natural gas
    10.
    发明授权
    Process for the liquefaction of natural gas 失效
    天然气液化过程

    公开(公告)号：US4548629A

    公开(公告)日：1985-10-22

    申请号：US540957

    申请日：1983-10-11

    申请人： Chen-hwa Chiu

    发明人： Chen-hwa Chiu

    IPC分类号： F25J1/02 ,  F25J3/02

    CPC分类号： F25J1/0264 ,  F25J1/0022 ,  F25J1/0035 ,  F25J1/004 ,  F25J1/0045 ,  F25J1/0052 ,  F25J1/0055 ,  F25J1/0085 ,  F25J1/0095 ,  F25J1/0097 ,  F25J1/0216 ,  F25J1/0218 ,  F25J1/0249 ,  F25J1/0268 ,  F25J1/0292 ,  F25J2205/02 ,  F25J2205/30 ,  F25J2210/06 ,  F25J2220/62 ,  F25J2220/64 ,  F25J2220/66 ,  F25J2220/68 ,  F25J2230/20 ,  F25J2230/60 ,  F25J2245/90 ,  F25J2270/90

    摘要： The present invention is a process for the liquefaction of high pressure natural gas. The natural gas is expanded through a turboexpander to reduce its pressure and thereby cool it. The natural gas is then passed through a demethanizer to remove the heavier components therefrom. The natural gas is then precooled, before substantial warming occurs, by heat exchange with a C.sub.2 hydrocarbon refrigerant, either ethane or ethylene, contained in a single refrigerant system. The precooled natural gas is liquefied by heat exchange with a mixed refrigerant contained in a mixed refrigerant system. The mixed refrigerant consists essentially of nitrogen, methane and a C.sub.2 hydrocarbon, either ethane or ethylene. The mixed refrigerant contained in the mixed refrigerant system is cooled by heat exchange with the C.sub.2 hydrocarbon refrigerant contained in the single refrigerant system.

    摘要翻译： 本发明是用于液化高压天然气的方法。 天然气通过涡轮膨胀机膨胀以降低其压力，从而使其冷却。 然后将天然气通过脱甲烷塔以从其中除去较重的组分。 然后通过与包含在单个制冷剂系统中的C2烃制冷剂（乙烷或乙烯）进行热交换，在大量升温之前将天然气预冷却。 通过与包含在混合制冷剂系统中的混合制冷剂进行热交换，将预冷却的天然气液化。 混合的制冷剂主要由氮，甲烷和C2烃，乙烷或乙烯组成。 包含在混合制冷剂系统中的混合制冷剂通过与包含在单个制冷剂系统中的C2烃制冷剂进行热交换而被冷却。