Described herein are apparatuses and systems related to at-shore liquefaction of natural gas. The systems can include land-based facilities connected to a source of electricity and feed gas, an at-shore water-based apparatus comprising a hull, an air-cooled electrically-driven refrigeration system (AER System), and a plurality of liquefied natural gas (LNG) storage tanks that are on a lower deck of the hull. The AER System can comprise one or more refrigeration trains, where each refrigeration train of the one or more refrigeration trains can include a portion of electrically-driven compressors and a portion of air coolers that at least or only partially cover the one or more refrigeration trains.

A system and method for supplying an energy grid with energy from an intermittent renewable energy source having a production unit for producing Hydrogen, Nitrogen, and Oxygen. The production unit is operated by using energy provided by the renewable energy source. An Oxygen storage receives and stores Oxygen produced by the production unit, a mixing unit receives and mixes the Hydrogen and the Nitrogen produced by the production unit to form a Hydrogen-Nitrogen-mixture, an Ammonia source receives and processes the Hydrogen-Nitrogen-mixture for generating a gas mixture containing Ammonia, an Ammonia power generator generates energy for the energy grid. The Ammonia power generator is fluidly connected to the Ammonia storage vessel, is configured to combust the received Ammonia in a combustion chamber to generate the energy, and is fluidly connected to the Oxygen storage to introduce Oxygen into the combustion chamber for combustion of Ammonia.

The invention relates to a method (100) for the electrolytic production of a liquid hydrogen product (4), in which a water-containing feed is subjected to an electrolysis (E) while receiving an anode raw gas (3), rich in oxygen and containing hydrogen, and a cathode raw gas (2) which is depleted of oxygen and rich in hydrogen, wherein the cathode raw gas (2) downstream of the electrolysis (E) is subjected to a purification (R), a compression (K), and a liquefaction (L), characterized in that the cathode raw gas (2) at least partially undergoes intermediate storage (Z) downstream of the electrolysis (E) and upstream of the liquefaction (L). A corresponding installation is also proposed.

A system that includes: (a) a liquid natural gas storage tank fluidly coupled to a first compressor, (b) a fuel cell having an inlet fluidly coupled to the first compressor and an H.sub.2 gas outlet fluidly coupled to a heat exchanger, wherein the heat exchanger receives compressed liquid natural gas from the first compressor; (c) an active magnetic regenerative refrigerator H.sub.2 liquefier that comprises at least one layer of a magnetic refrigerant material, wherein the active magnetic regenerative refrigerator H.sub.2 liquefier receives cooled H.sub.2 gas from the heat exchanger.

A method of controlling the renewable energy absorbed by a hybrid power train for driving a load, and in particular compressors for a liquefied natural gas (LNG) plant is disclosed. The method comprises an analysis of the health status of part and of the whole hybrid power plant that drive the load. A power plant is also disclosed, operated by the controlling method.

The disclosure pertains to a plant for the production of ammonia. The ammonia is produced from hydrogen obtained by electrolysis of water. The electrolysis is powered by a renewable source of energy, complemented with power obtained from the plant during periods of low or no availability of the renewable energy. To this end, the plant is configured such that it can be operated in a charge configuration (obtaining and storing power) and a discharge configuration (employing said power).

Methods are for storing electricity and producing liquefied natural gas (LNG) or synthetic natural (SNG) and using carbon dioxide and for producing electricity, natural gas (NG) or SNG. The methods involve, starting from a water flow, producing an oxygen gas flow and a hydrogen gas flow by electrolysis in an electrolytic cell. A first hydrogen gas flow portion and a second hydrogen gas flow portion are obtained. The first hydrogen gas flow portion is allocated to a methanation step in the presence of carbon dioxide gas. A condensed recirculation water vapor flow is obtained to be allocated to the methanation step and performing methanation. The second hydrogen gas flow portion is allocated to a cooling and liquefaction step. A liquid hydrogen flow is obtained, which is stored in a liquid hydrogen tank.

Disclosed are a method and a device for manufacturing liquid hydrogen by offshore off-grid superconducting wind turbine. The method comprises the following steps: electrolyzing seawater to obtain hydrogen based on electric energy output by an offshore off-grid superconducting wind turbine generator, liquefying the hydrogen into prepared liquid hydrogen, and outputting a part of the liquid hydrogen as the refrigerant of the offshore off-grid superconducting wind turbine generator. The device comprises a liquid preparation platform, an offshore off-grid superconducting wind turbine generator, a seawater electrolysis unit, a hydrogen liquefaction unit and a liquid hydrogen storage unit, wherein the power ends of the seawater electrolysis unit and the hydrogen liquefaction unit are connected with the output end of the offshore off-grid superconducting wind turbine generator, and the hydrogen liquefaction unit is connected with the coolant input end of the offshore off-grid superconducting wind turbine generator.

The invention relates to a plant and a method for producing liquefied hydrogen comprising a hydrogen gas generator, a liquefier, a feed line connecting an outlet of the hydrogen gas generator to an inlet of the liquefier, the liquefier comprising a refrigerator having a cycle circuit to cool the hydrogen gas from the feed line, the plant comprising a buffer store configured to store the compressed hydrogen gas between the hydrogen gas generator and the liquefier, the liquefier being configured to supply a cooling power and/or the liquefaction capacity that can be modified between at least two levels, the plant comprising a means for determining the fill level of the buffer store, the plant being configured to modify the cooling power and/or liquefaction capacity of the liquefier as a function of the fill level of the buffer store determined by the determining means.

There is provided a transportation system that can efficiently transport renewable energy from power generation facilities in remote locations to hydrogen energy consumption areas with low environmental impact. The system includes a power generator that generates and stores electricity using renewable energy, a water electrolyzer that generates hydrogen by electrolyzing water using the electricity generated by the power generator, a methane synthesizer that generates methane using the hydrogen generated and recycled CO.sub.2 as raw materials through the Sabatier reaction, a methane transportation means that transports the generated methane to the hydrogen energy consumption site without emitting CO.sub.2 into the atmosphere, a hydrogen production and carbon capture unit that produces hydrogen by autothermal reforming method using the transported methane and separately prepared oxygen as raw materials, and a CO.sub.2 transportation means that transports the recycled CO.sub.2 without emitting CO.sub.2 into the atmosphere to the site where the methane synthesizer is installed.