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Liquid nitrogen engine patents

Laura HorcajadaLaura Horcajada

Did you know that up to 80% of liquid nitrogen engine information is contained in patent documents?

With > 100 million patents worldwide, the patent system is the most complete source of technology information available. Much of the information contained within patents cannot be found anywhere else, making patents a unique source of knowledge.

Below you will find a few patents related to liquid nitrogen engines.

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Process for nitrogen liquefaction by recovering the cold derived from liquid methane gasification

This process for nitrogen liquefaction by recovering the cold derived from liquid methane gasification has the characteristic of cooling with the liquid methane (1) a cryogenic fluid (5), preferably nitrogen, and then using said cryogenic fluid as coolant fluid (9,10) in two nitrogen compressor units of the nitrogen liquefier, both for the interstage coolers (11,12,13,27,28,29,30,31,32) and for the intake coolers (27) and for the final delivery coolers (19,32) of one of the nitrogen compressor unit.The use of nitrogen cooled by the methane enables liquid nitrogen to be produced (3) in a liquefier consisting of the two said compressor units and a cryogenic turbine (17), with a very low specific energy consumption.

Publication number: EP1469265A1 | Search similar patents

Assembly for recuperating hydrocarbon light fractions from a petroleum product tank

The invention relates to cryogenic engineering, in particular to cryogenic gas machines operating according to a Stirling cycle. Said invention makes it possible to increase the efficiency of an assembly for recuperating hydrocarbon vapour light fractions. The inventive assembly for recuperating hydrocarbon vapour light fractions comprises a Stirling cryogenator (1), a liquid nitrogen storage tank (3), a pipeline (4) for draining said liquid nitrogen from the cryogenator condenser to the liquid nitrogen storage tank (3), a contact heat exchanger (7) provided with a cooler (9) arranged therein, a pipeline passing through the cooler (9) and used for supplying nitrogen from the liquid nitrogen storage tank (3) to the condenser (2) of the cryogenator (1), a pipeline (13) used for supplying an air-vapour mixture and connecting a hydrocarbon storage tank (12) to the contact heat exchanger (7) and a pipeline (15) for exhausting air from said contact heat exchanger. The air-vapour mixture supply pipeline (13) is provided with an additional heat exchanger (16), which the pipeline (15) for exhausting air from said contact heat exchanger passes through.

Publication number: WO2007067092A1 | Search similar patents

Combined system for separating gas mixtures and converting energy

The invention relates to the field of gas separation. The combined system for separating gas mixtures and converting energy comprises, in a single housing, a Stirling cryogenic cooler (1), a Stirling heat pump (2) and a Stirling engine (3) which have a common rod (4) with a hydraulic cylinder (5) and a pneumatic cylinder (6). The cryogenic cooler (1) and the heat pump (2) are connected by a recuperator (7), and the heat pump (2) is connected to the engine (3) by a recuperator (8) with a heat accumulator (9). The system further comprises a fractionating column (10), conduits, heat exchangers for freezing out moisture and carbon dioxide and an additional Stirling engine as a device for converting heat and liquid nitrogen energy. The invention makes it possible to separate gas mixtures more efficiently with minimal energy expenditure.

Publication number: WO2012023915A1 | Search similar patents

Stirling engine control system and ship equipped with stirling engine

This Stirling engine control system is characterized by being equipped with: a Stirling engine (10) that uses heat to operate; an electrical generator (20) linked to the Stirling engine (10); an inverter/converter (51) connected to the electrical generator (20); an inverter/converter control means (52) that controls the inverter/converter (51); a Stirling engine starting/stopping means (53) that controls the stopping/starting of the Stirling engine (10); and a control means (54) that controls the inverter/converter control means (52) and the Stirling engine starting/stopping means (53). The Stirling engine (10) can be started in a stable manner, and the Stirling engine (10) can be stopped reliably and quickly.

Publication number: WO2013084490A1 | Search similar patents

Gas liquefaction system with absorption machine and stirling heat pump

The invention relates to a gas liquefaction system comprising an absorption machine (1, 2, 3, 4, 5) having at least one stage, which is intended to produce cryogenic cold by implementing an absorption cycle, the stage comprising an evaporator (5) of which the outlet (24) is connected from upstream to downstream firstly to at least one exchanger (6) for cooling the gas that is to be liquefied so as to lower the temperature thereof from ambient temperature down to a given temperature and, on the other hand, a compression-type or stirling-cycle heat pump (15), intended to operate a stirling cycle, to supplement the cooling of the gas that is to be liquefied so as to bring the temperature thereof down from the given temperature to at least the temperature at which the gas condenses.

Publication number: WO2016091903A2 | Search similar patents

Novel stirling heat engine

A novel Stirling heat engine taking air, water or a refrigerant as a working medium. The engine comprises such main components as two or more heat-releasing cylinders (1, 2), two or more heat-absorbing cylinders (3, 4), an expander (7) or a dual-use cylinder, a three-way valve (8) or a multi-way valve, a heat exchange system (6), and a sealed container (5). The engine utilizes pressure from inside the sealed container to do work. This novel Stirling heat engine can use the ambient atmospheric pressure to do work, so that the output work and efficiency are both higher than those of a conventional heat engine.

Publication number: WO2015067168A1 | Search similar patents

Cryogenic car filling liquefied natural gas station

The invention relates to cryogenic engineering. The inventive cryogenic car filling liquefied natural gas station comprises a low or average pressure gas pipeline section (1), a water and carbon dioxide freeze-out device (8), a Stirling cryogenerator (3), a closed system (15) for cooling said cryogenerator (3) comprising a pump (17) for flowing a cooling fluid and a heat exchanger (18) for discharging heat to the environment, an ambient medium circuit (19) provided with a fan (20) for supplying air from the environment, a cryogenic tank (6) for storing a liquefied natural gas, a natural gas supply pipeline (2) a pipeline (4) for draining and re-liquefying liquefied natural gas vapours which is used for interconnecting the gas pipeline (1), cryogenerator (3), freeze-out device (8) and a liquefied natural gas filling column provided with a filler nozzle. Heat-insulated pipelines (12, 13) for supplying liquefied natural gas with the aid of a cryogenic pump and for vapour return connect a reservoir (6) and the filler nozzle. The vapour return pipeline (13) is connected to the gas cavity of the cryogenic reservoir (6). Said invention makes it possible to re-condense vapours of the liquefied natural gas from car fuel tanks and to reduce the loses thereof when it is used in the form of an engine fuel.

Publication number: WO2007067093A1 | Search similar patents

Device for liquefying a gas

In order to prevent icing of the cryogen, a device for liquefying a gas includes a heater provided in a cooling chamber at the output of a Sterling cycle engine. The heater is controlled by a gas pressure sensor in the cryostat in communication with the chamber and matches the cooling load to the cooling capacity of the Sterling cycle engine.

Publication number: US4824454A | Search similar patents

Method and device for producing cooled products

The method involves bringing a to-be refrigerated product in direct thermal contact with a cryogenic coolant, particularly by mixing the product with the coolant. The cryogenic coolant, particularly solid nitrogen, is separated from the product. The solid nitrogen is produced from liquid nitrogen by reducing the pressure or the nitrogen partial pressure in a gas phase present over the liquid nitrogen. The pressure is reduced to a value below a triple point pressure of the nitrogen. The to-be refrigerated product and the solid nitrogen are supplied to a pressure vessel (2). An independent claim is included for a device for manufacturing the refrigerated products with a mixing device integrated in a pressure vessel.

Publication number: EP2657630A2 | Search similar patents

Cryogenic workstations using nitrogen

Cryogenic devices are provided in which liquid nitrogen is used to maintain ultra-low temperatures in which samples can be manipulated.

Publication number: EP3004720A1 | Search similar patents

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