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    PROCESS FOR LIQUEFYING HYDROGEN
    7.
    发明申请
    PROCESS FOR LIQUEFYING HYDROGEN 审中-公开
    用于液化氢的方法

    公开(公告)号：US20100083695A1

    公开(公告)日：2010-04-08

    申请号：US12304357

    申请日：2007-06-01

    Applicant: Andres Kundig

    Inventor： Andres Kundig

    IPC: F25J1/02

    CPC classification number: F25J1/001 ,  F25J1/0052 ,  F25J1/0067 ,  F25J1/0072 ,  F25J1/0205 ,  F25J1/0221 ,  F25J1/0265 ,  F25J1/0268 ,  F25J2210/62 ,  F25J2240/60 ,  F25J2245/90 ,  F25J2270/904

    Abstract: The invention relates to a process for liquefying hydrogen. To reduce the specific energy consumption, the following process steps are used: a) the precooling of the hydrogen stream by indirect heat exchange against a pressurized LNG stream to a temperature of between 140 and 130 K, b) the precooling of the hydrogen stream by indirect heat exchange against a coolant to a temperature of between 85 and 75 K, c) where the precooling of the coolant takes place against a pressurized LNG stream, and d) the cooling and at least partial liquefaction of the precooled hydrogen stream takes place by indirect heat exchange against another hydrogen stream channeled through a closed cooling circuit, e) where the precooling of the condensed hydrogen stream, which is channeled through a closed cooling circuit, takes place against a pressurized LNG stream.

    Abstract translation: 本发明涉及一种液化氢的方法。 为了降低比能量消耗，使用以下工艺步骤：a）通过对加压LNG流进行间接热交换至140至130K之间的温度来预冷氢气，b）氢气流的预冷却 对冷却剂进行间接热交换至85至75K之间的温度，c）冷却剂对加压LNG流进行预冷却，以及d）预冷氢气流的冷却和至少部分液化由 对通过封闭冷却回路引导的另一氢气流进行间接热交换，e）通过封闭冷却回路引导的冷凝氢气流的预冷却对加压LNG流进行。

    A HYDROGEN OR HELIUM THROTTLING LIQUEFACTION SYSTEM USING DIRECT CURRENT FLOW FROM THE COLD AND HOT ENDS OF THE REGENERATIVE CRYOCOOLERS
    9.
    发明公开
    A HYDROGEN OR HELIUM THROTTLING LIQUEFACTION SYSTEM USING DIRECT CURRENT FLOW FROM THE COLD AND HOT ENDS OF THE REGENERATIVE CRYOCOOLERS 审中-公开

    公开(公告)号：US20240263871A1

    公开(公告)日：2024-08-08

    申请号：US18023715

    申请日：2022-07-07

    Applicant: ZHEJIANG UNIVERSITY

    Inventor： XIAOQIN ZHI ,  LIMIN QIU ,  TAO WEI ,  XIN CHEN ,  KAI WANG ,  SHIRAN BAO

    IPC: F25J1/00 ,  F25J1/02

    CPC classification number: F25J1/004 ,  F25J1/0007 ,  F25J1/001 ,  F25J1/0065 ,  F25J1/0067 ,  F25J1/0202 ,  F25J1/0242 ,  F25J1/0264 ,  F25J1/0276

    Abstract: The present invention discloses a hydrogen or helium throttling liquefaction system using direct current (DC) flow from the cold and hot ends of the regenerative cryocoolers, which belongs to the technical field of refrigeration and cryogenics. It includes a regenerative cryocooler module, a hot-end DC flow module, a cold-end DC flow module, a throttling liquefaction module, and a gas-phase circulation module. The modules are interconnected to form a closed loop for the flow of hydrogen or helium working fluid. DC flow is introduced from the cold and hot ends of the regenerative cryocooler through the DC flow pipelines and DC flow valves. The hot-end DC flow exchanges heat with the reflowing low-temperature working fluid and is cooled down. After that, it mixes with the cold-end DC flow and enters the throttling liquefaction module to generate liquid phase through throttling and liquefaction. After the liquid phase has output cooling capacity, it flows through the gas-phase circulation module and then enters the back-pressure chamber of the compressor to complete the cycle. Compared with the existing small-scale hydrogen and helium liquefaction technology using regenerative cryocoolers, the present invention has the advantages of simple structure, easy installation, high heat transfer efficiency and liquefaction efficiency of the system.

    DEVICE AND METHOD FOR REFRIGERATION OR LIQUEFACTION OF A FLUID
    10.
    发明公开
    DEVICE AND METHOD FOR REFRIGERATION OR LIQUEFACTION OF A FLUID 审中-公开

    公开(公告)号：US20240118024A1

    公开(公告)日：2024-04-11

    申请号：US18276603

    申请日：2022-01-18

    Applicant: L'Air Liquide, Societe Anonyme pour l'Etude et l’Exploitation des Procedes Georges Claude

    Inventor： Mathieu ROIG ,  Remi NICOLAS ,  Fabien DURAND ,  Guillaume DELAUTRE

    IPC: F25J1/02 ,  F25J1/00

    CPC classification number: F25J1/0279 ,  F25J1/001 ,  F25J1/0022 ,  F25J1/005 ,  F25J1/0065 ,  F25J1/0067 ,  F25J1/0072 ,  F25J1/0097 ,  F25J1/0284 ,  F25J1/0296 ,  F25J1/0298 ,  F25J2230/04 ,  F25J2270/14

    Abstract: Disclosed is a device for refrigerating or liquefying a fluid such as natural gas or hydrogen, comprising a circuit for fluid that is to be cooled and has an upstream end for connection to a source of gaseous fluid and a downstream end for connection to a member for collecting the cooled or liquefied fluid, the device comprising a heat exchanger assembly in heat exchange with the circuit of fluid to be cooled, the device comprising a refrigerator in heat exchange with at least a portion of the heat exchanger assembly, the refrigerator being of the type that has a cycle for refrigerating a cycle gas containing at least one of: helium, hydrogen, nitrogen or neon; said refrigerator comprising, arranged in series in a cycle circuit: a mechanism for compressing the cycle gas, at least one member for coding the cycle gas, a mechanism for expanding the cycle gas, and at least one member for reheating the expanded cycle gas, wherein the compression mechanism comprises a plurality of compression stages in series composed of a centrifugal compressor assembly, the compression stages being mounted on a set of shafts rotated by an assembly of one or more motors, the at least one member for cooling the cycle gas comprising at least one heat exchanger arranged at the outlet of at least one compression stage in heat exchange with the cycle circuit, said heat exchanger being cooled by a heat-transfer fluid, characterized in that the compression mechanism comprises at least two compression stages that are arranged successively in series and do not include any member for cooling the cycle gas such as a heat exchanger therebetween.

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