41 results about "Liquid methane" patented technology

The invention relates to a system for full-supercooling large-flow liquid methane filling and a using method of the system. The full-supercooling large-flow liquid methane filling system is stable, reliable, high in automation degree, capable of dynamically adjusting the supercooling temperature and flow of liquid methane and high in accuracy, and comprises a storage box, a pressurization module, a recovery module, a methane filling module, a control module and a nitrogen filling module, and the pressurization module comprises a methane pressurization tank; the methane filling module comprises a methane filling tank, the nitrogen filling module comprises a nitrogen filling tank and a subcooler, the recovery module comprises a methane recovery tank, and the control module pressurizes the methane recovery tank and the methane filling tank by controlling the pressurization module and adjusts the filling flow and temperature of methane to prevent condensation by controlling the methane filling module and the nitrogen filling module. Flow stabilization and backflow are carried out by controlling the methane filling module and the recovery module.

The utility model provides a full supercooled liquid methane filling system. The full supercooled liquid methane filling system comprises a refrigerant filling module, a supercooled liquid methane module and a liquid methane filling module. Wherein the refrigerant filling module is connected with a liquid methane supercooling storage tank of the supercooling liquid methane module through a filling pipeline and is used for supercooling liquid methane in the liquid methane storage tank. And the supercooled liquid methane module is connected with the liquid methane filling module through a pipeline and is used for filling cooled liquid methane into the rocket storage tank. The liquid methane supercooling storage tank comprises a liquid methane storage tank and a heat preservation layer located outside the liquid methane storage tank, and a refrigerant interlayer is arranged between the liquid methane storage tank and the heat preservation layer and used for containing the refrigerant provided by the refrigerant filling module and cooling liquid methane in the liquid methane storage tank. According to the filling system, the liquid methane supercooling efficiency can be improved, liquid methane crystallization is avoided, the supercooling process is stable and efficient, and the economic benefit of the supercooling filling process is high.

The application discloses an online liquid methane preparation full-subcooling filling process, which comprises a liquid methane storage device, a pressurizing pipeline, a liquid methane subcooling filling device, a filling pipeline, a liquid methane discharge device and a discharge pipeline. The output end of the liquid methane storage device is connected with the input end of the pressurizing pipeline, the output end of the pressurizing pipeline is connected with the input end of the filling pipeline, and the filling pipeline is connected with a first filling branch and a second filling branch after passing through the liquid methane subcooling filling device. The first filling branch is used for being connected with a liquid methane storage tank on an arrow, and the second filling branch is used for being connected with the input end of the discharge pipeline. The output end of the discharge pipeline is connected with the liquid methane discharge device, and a discharge pipeline adjusting valve and a flow measuring instrument are arranged on the discharge pipeline. The system can guarantee stable liquid methane flow, avoid the risk of crystallization of subcooling liquid methane due to too low temperature, and realize full-subcooling filling of liquid methane.

The invention provides a two-component injector based on liquid oxygen and liquid methane and an attitude control engine. The injector at least comprises an injection disc, a spark plug, a liquid oxygen collecting cavity and a liquid methane collecting cavity. The injection disc is of a double-layer panel structure with a closed cavity, a plurality of connecting columns are arranged in the cavity, and the connecting columns are uniformly distributed and connected between the upper-layer panel and the lower-layer panel; at least part of the connecting columns are provided with injection holes penetrating through the upper-layer panel and the lower-layer panel. The liquid oxygen collecting cavity and the liquid methane collecting cavity are arranged on the outer end face of the upper-layer panel and are respectively communicated with the spray pipe through injection holes formed in the connecting columns; cooling holes communicated with the liquid methane collecting cavity, the cavity and the spray pipe are formed in the upper-layer panel and the lower-layer panel. The liquid methane entering the double-layer panel structure is used for cooling the injector.

A process for producing liquid methane with a reduced content of higher hydrocarbons, comprising the steps of: providing a stream of natural gas containing a mixture of ethane and higher hydrocarbons; cooling the mixture in a first heat exchanger passage; passing the cooled mixture to a gas expander; passing an outlet stream from the gas expander to a separator having a vapor outlet stream and a liquid outlet stream; compressing the vapor outlet stream; cooling the compressed vapor stream in a second heat exchanger passage to form a first liquefied methane product having a reduced content of higher hydrocarbons, wherein the liquid outlet stream from the separator forms a second liquefied methane product having an increased content of higher hydrocarbons.

Process for producing liquid methane with a reduced content of higher hydrocarbons comprising providing a stream 1 of natural gas containing ethane and higher hydrocarbons cooling the resulting mixtur

The application provides a filter pipeline automatic flushing and pressure regulating method, which can automatically identify the blockage of a filter and corresponding pipeline and automatically clean the filter without removing the filter from a pipeline system, thereby avoiding the risk of adding extra substances in the pipeline system, and particularly reducing the risk of water vapor entering a liquid oxygen and liquid methane pipeline system. The filter pipeline automatic flushing and pressure regulating method can also compensate for the pressure loss of fluid after passing through the filter, solve the problem of pressure difference before and after the filter, and meet the test scene with strict requirements on fluid pressure loss. All functions of the method can be automatically controlled, which greatly shortens the operation time, saves the labor cost, and reduces the possibility of adding extra substances in the pipeline system.

A system and method for preparing and supplying a densified liquid oxidant to a spacecraft launch facility is provided. Liquid oxygen streams obtained from co-located air separation devices for liquid preparation are densified in an integrated densification system of two refrigeration stages. The first refrigeration stage is a nitrogen-based inverse Brayton cycle refrigeration cycle that provides refrigeration to the second refrigeration stage. The second refrigeration stage is a refrigerant circuit comprising helium and / or neon that densifies the liquid oxygen to a temperature between about 70 Kelvin and 57 Kelvin. The integrated densification system may also be configured to densify liquid methane or other propellants used in a spacecraft.

A process and apparatus (100) for producing nitrogen-purified liquid methane from a feed gas stream (1) containing at least 98 mol% methane and between 0.1 and 2 mol% nitrogen, wherein the feed gas stream (1) is cooled to a temperature between 110 K and 200 K in a first counter-current heat exchanger (3) with a nitrogen vapor stream (9) to produce a cooled stream (5), a liquid nitrogen bath (21) is in heat exchange with the cooled stream (5) via a second heat exchanger (7) through which the cooled stream (5) passes, the liquid nitrogen bath (21) producing nitrogen vapor (9) supplied to the first heat exchanger (3) to produce the cooled stream, the cooled stream (5) exiting the second heat exchanger (7) is introduced into a distillation column (11) for distillation, and a liquid (13) containing at least 99.5% mol, preferably at least 99.9% mol,Methane is drawn off from the distillation column (11) in the tank as the final product. (Shorthand figure: Fig. 1)

The present application relates to a kind of liquefied natural gas preparation system and its preparation method, specifically to a kind of engineering large-scale back pressure supercooled liquid methane preparation system and preparation method, solve the existing LNG when storage, transfer, the method for selecting LNG supercooling is prone to excessive heat exchange, cause LNG to be frozen after plugging heat exchanger, lead to using liquid nitrogen to join heat exchanger heat exchange efficiency is low, the technical problem of large-scale preparation supercooled liquid methane cost increase.This engineering large-scale back pressure supercooled liquid methane preparation method, including liquid methane supercooling device, vacuum extraction device, liquid nitrogen gasification device, liquid accumulator and liquid nitrogen pump;Vacuum extraction device's injection medium mouth is connected with external nitrogen source, and its outlet is connected with liquid methane supercooling device;The inlet of liquid nitrogen gasification device is connected with the outlet of liquid nitrogen pump, and the outlet of liquid nitrogen gasification device is connected with the inlet of liquid accumulator;The outlet of liquid accumulator is connected with liquid methane supercooling device;Realize the supercooling of large-scale LNG.

The invention provides a refrigerating system for a Mars in-situ propellant preparation and storage process, which comprises a gas-liquid separation storage tank, a compressor, an aftercooler, a heat regenerator, a first throttle valve, a carbon dioxide capture module, a liquid oxygen storage tank, a liquid methane storage tank and a fan, and is characterized in that the heat regenerator comprises a high-pressure refrigerant flow channel, a low-pressure refrigerant flow channel, an oxygen flow channel and a methane flow channel; gaseous oxygen is liquefied in the oxygen flow channel and then stored in the liquid oxygen storage tank, and gaseous methane is liquefied in the methane flow channel and then stored in the liquid methane storage tank; the carbon dioxide capturing module comprises a refrigerant flow channel and a carbon dioxide flow channel, a refrigerant of the refrigerant flow channel is used for providing cooling capacity for carbon dioxide freezing capturing, fluid of the carbon dioxide flow channel is Mars atmosphere, and the Mars atmosphere is introduced into the carbon dioxide capturing module through a fan. According to the refrigerating system, integrated cooling of carbon dioxide capture, methane liquefaction and oxygen liquefaction can be achieved, and the complexity of system configuration is reduced.

The invention provides a multifunctional test system for a liquid oxygen methane engine test bed. The multifunctional test system comprises a gas path system, a liquid path system, a test station and a control module. Wherein the gas path system and the liquid path system are connected through a pipeline for gas supply, the liquid path system is connected with the test run station and used for providing liquid fuel needed by testing for the test run station, and the control module is connected with and controls operation of the gas path system and the liquid path system. The liquid path system comprises a liquid oxygen storage module, a liquid methane storage module, a liquid oxygen supercooling module, a liquid methane supercooling module, a liquid oxygen conveying module and a liquid methane conveying module. The multifunctional test system is composed of a set of gas path system, two sets of liquid path systems and two test run stations. The two sets of liquid path systems comprise the high-low pressure liquid oxygen liquid path module and the high-low pressure liquid methane liquid path module, one set of gas path system is adopted for gas supply, medium conveying can be carried out according to requirements, resource sharing of test equipment is improved, the total cost of equipment construction and maintenance is reduced, and the engine test efficiency is improved.

The utility model belongs to the technical field of chemical production equipment, and particularly relates to a device for recycling methane in liquid nitrogen wash feed gas, which comprises a liquid nitrogen wash feed gas system, a feed gas separator, a nitrogen wash tower, a liquid methane pump, a high-pressure nitrogen cooler, a first feed gas cooler, a second feed gas cooler and a methane gas pipe network, the liquid nitrogen wash raw material gas system is connected with a raw material gas separator through a raw material gas pipeline, the raw material gas pipeline penetrates through a first raw material gas cooler and a second raw material gas cooler, and the raw material gas separator is connected to the lower section of a nitrogen wash tower through a first outlet pipeline and connected to the inlet end of a liquid methane pump through a second outlet pipeline. The nitrogen washing tower is connected to the second outlet pipeline through a first methane pipeline, and the outlet end of the liquid methane pump is connected to the methane gas pipe network through a second methane pipeline. The device overcomes the defect of high energy consumption of the original process, can greatly reduce the energy consumption, reduces the production cost, and achieves the purpose of energy conservation.

The invention belongs to the technical field of chemical process tail gas treatment, and particularly relates to a hydrogen-containing tail gas and carbon dioxide tail gas utilization device. In order to improve the utilization efficiency of hydrogen-containing tail gas and carbon dioxide tail gas and reduce the problems of environmental pollution and the like, the hydrogen-containing tail gas, the carbon dioxide tail gas and coke oven gas are introduced into an adsorption tower, and adsorbed raw material gas enters a pre-hydrogenation reactor through a supercharger, a first separator and a feeding and discharging heat exchanger; after hydrogenation reaction, the gas passes through a first-stage hydrogenation reactor, a medium-temperature desulfurization reactor, a second-stage hydrogenation reactor, a fine desulfurization reactor and a feeding and discharging heat exchanger, after heat exchange, the gas is condensed by a water cooler and separated by a second separator, the gas enters a carbon dioxide removal tower for further purification, the purified gas enters a cryogenic separation device, and liquid methane is separated out; the tail gas utilization value is improved, economic benefits are increased, and carbon dioxide emission is reduced.

The present invention discloses a method for increasing the boiling point temperature of methane propellant, which relates to the field of cryogenic propellants. The method comprises: separating the carbon dioxide component in the Martian atmosphere and converting it into a liquid state, which is stored in a carbon dioxide storage tank; converting part of the liquid carbon dioxide in the carbon dioxide storage tank into a product gas containing gaseous methane; separating and purifying the product gas to obtain high-purity methane gas, converting it into liquid methane, and storing it in a methane storage tank; uniformly mixing the liquid carbon dioxide in the carbon dioxide storage tank with the liquid methane in the methane storage tank; and transporting the mixed product to a spacecraft tank via a pipeline. The overall boiling point temperature of the methane propellant containing liquid carbon dioxide is increased, thereby reducing the evaporation loss of the propellant during the spacecraft's navigation. In the in-situ preparation process of methane propellant on the Martian surface, the present invention utilizes captured liquid carbon dioxide as an additive medium to increase the boiling point of the methane propellant, and achieves the set target according to the colligative principle.

The application provides a full supercooled liquid methane filling system, which comprises a refrigerant filling module, a supercooled liquid methane module and a liquid methane filling module. The refrigerant filling module is connected with a liquid methane supercooling tank of the supercooled liquid methane module through a filling pipeline, and is used for supercooling the liquid methane in the liquid methane tank. The supercooled liquid methane module is connected with the liquid methane filling module through a pipeline, and is used for filling the rocket tank with the supercooled liquid methane. The liquid methane supercooling tank comprises a liquid methane tank and a heat preservation layer outside the liquid methane tank, and a refrigerant interlayer is arranged between the liquid methane tank and the heat preservation layer, which is used for containing the refrigerant provided by the refrigerant filling module and cooling the liquid methane in the liquid methane tank. The filling system can improve the supercooling efficiency of the liquid methane, and the liquid methane will not crystallize. The supercooling process is stable and efficient, and the supercooling filling process has high economic benefits.

The utility model provides a control system for a blasting test of a rocket tank. The control system comprises a water injection and supplement control device, an oxygen tank pressurization control device and a combustion tank pressurization control device, the rocket stainless steel storage tank is of a common-bottom structure, and an oxygen tank on the upper portion of the storage tank is used for being filled with liquid oxygen propellants. The combustion box at the lower part of the storage box is used for filling a liquid methane propellant; the oxygen box and the combustion box are both connected with the water supply storage box; the water supply storage tank is used for providing a water source for liquid pressurization for the oxygen tank and the combustion tank; the water injection and supplement control device is used for controlling water injection cans of the water supply storage tank, the oxygen tank and the combustion tank; the oxygen tank pressurization control device is used for controlling the water supply storage tank to perform water injection step-by-step pressurization on the oxygen tank; the combustion box pressurization control device is used for controlling the water supply storage box to conduct water injection step-by-step pressurization on the combustion box. Therefore, the pressurized internal pressure bursting test of the stainless steel storage tank of the rocket is completed. According to the utility model, on-line automatic control can be carried out on the pressurized internal pressure bursting test of the stainless steel storage tank of the rocket, and the test working efficiency and the test control accuracy can be improved.

The application provides a full supercooled liquid methane filling method, which comprises the following steps: cold agent transfer filling: a cold agent tank truck fills cold agent into a cold agent filling module through a pipeline; cold agent filling: the cold agent filling module connects a liquid methane supercooling tank of a supercooled liquid methane module through a filling pipeline, and cold agent filling is performed; liquid methane transfer filling: a liquid methane tank truck fills liquid methane into the liquid methane supercooling tank of the supercooled liquid methane module through a pipeline; liquid methane supercooling: liquid methane in the liquid methane supercooling tank is cooled by heat exchange with the cold agent through a spaced metal wall; supercooled liquid methane filling: the supercooled liquid methane module is connected to a liquid methane filling module through a pipeline, and the liquid methane supercooling tank is pressurized to fill the liquid methane cooled in the liquid methane supercooling tank into a rocket tank; the liquid methane supercooling tank comprises a liquid methane tank and a heat preservation layer outside the liquid methane tank, and a cold agent interlayer is arranged between the liquid methane tank and the heat preservation layer to accommodate the cold agent provided by the cold agent filling module and cool the liquid methane in the liquid methane tank. The filling system can improve the liquid methane supercooling efficiency, does not cause liquid methane crystallization, and is stable and efficient in the supercooling process and has high economic benefits in the supercooled filling process.

This invention discloses a system for the integrated utilization of liquid oxygen and liquid methane, comprising a liquid oxygen component, a liquid methane component, a combustion energy component, a second heat exchanger, an oxygen storage tank component, a methane storage tank component, and a CO2 storage tank component. The inlet end of the combustion energy component is connected to the liquid oxygen component and the liquid methane component. CO2 generated after the liquid oxygen and liquid methane are mixed and combusted in the combustion energy component is input to the inlet end of the second heat exchanger via a pipeline. The liquid oxygen component and the liquid methane component are also connected to the inlet end of the second heat exchanger, and the outlet end of the second heat exchanger is connected to the oxygen storage tank component, the methane storage tank component, and the liquid CO2 storage tank component, respectively. This invention also discloses a method for using the integrated utilization system of liquid oxygen and liquid methane. The beneficial effects of this invention are: carbon capture and zero emissions are achieved; the system has multiple products, high comprehensive utilization rate, and good economic benefits.

The application belongs to the technical field of cryogenic propellant filling, and discloses a test system and method for testing liquid methane transient filling of a large-capacity cavity pipeline, wherein the test system for testing liquid methane transient filling of a large-capacity cavity pipeline comprises a liquid methane storage unit, a liquid methane supply unit, a nitrogen supply unit, a liquid methane pressurizing unit, a liquid methane filling unit, a liquid methane recovery unit, a liquid methane PLC control unit, a liquid methane visual observation unit and a data monitoring unit; the application can carry out test and measurement on the process of filling a large-capacity cavity pipeline at room temperature by liquid methane, and obtain the pipeline flow rate and the temperature and pressure values of each section of the pipeline during the filling process, so as to accurately predict the changes of each physical quantity in the pipeline during the starting process of a rocket engine and determine a reasonable ignition timing.

The present invention relates to the technical field of ammonia preparation devices, specifically a device for co-producing hydrogen and methane by coupling coal gasification and coal coking, which includes an exhaust gas purification tower. The exhaust gas purification tower is correspondingly arranged with an acetylene cracking furnace mixer, and a methanation catalytic reaction kettle, a liquefaction tank, and a gas mixing and preheating tank are successively arranged between the exhaust gas purification tower and the acetylene cracking furnace mixer. Moreover, the exhaust gas purification tower, the methanation catalytic reaction kettle, the liquefaction tank, the gas mixing and preheating tank, and the acetylene cracking furnace mixer are successively connected through pipelines. The beneficial effects are as follows: The device and process method for co-producing hydrogen and methane by coupling coal gasification and coal coking proposed by the present invention realize that the coke oven gas undergoes deammoniation, debenzolation, wet crude desulfurization, dry fine desulfurization, methanation, removal of carbon monoxide and high-carbon hydrocarbons, and finally cryogenic separation to produce liquid methane with a purity of more than 98%. At the same time, the by-products are clean H2 and N2 mixed gases for ammonia synthesis production.

The application discloses a liquid oxygen / liquid methane ground test system satisfying the requirement of co-base zero evaporation storage, which comprises an outer cylinder wall, a large-area cold screen hung in the inner part of the outer cylinder wall, a liquid nitrogen cavity, a hot water cavity arranged outside the outer cylinder wall, a liquid methane cavity and a liquid oxygen cavity hung in the large-area cold screen, and the liquid methane cavity and the liquid oxygen cavity jointly form a liquid oxygen / liquid methane co-base storage tank. The application measures the influence of different materials on the storage state of liquid oxygen / liquid methane propellant by changing the co-base interlayer material between the liquid oxygen / liquid methane cavities; the balance of the liquid oxygen / liquid methane state in the zero evaporation storage process is destroyed by controlling the opening and closing of oxygen / methane exhaust valves, and the state change of the liquid oxygen / liquid methane in the balance recovery process is measured; the liquid oxygen and liquid methane are obtained by in-situ liquefaction of oxygen / methane gas by using liquid nitrogen, the purchase and transportation of dangerous liquid oxygen / liquid methane are omitted, and the safety in the test process is improved; the heat flux density entering the storage tank through the refrigeration system and the multilayer thermal insulation material when the refrigeration machine is turned off is measured according to the low-temperature fluid steady evaporation method. By controlling the thermal boundary temperature simulation screen and the vacuum control valve in the system, the liquid oxygen / liquid methane propellant co-base zero evaporation storage state can be tested under different thermal boundary temperatures and different vacuum degrees.

The invention provides a pressurizing and deflating system for a low-temperature storage tank of an engine test bed. The pressurizing and deflating system comprises a nitrogen gas source, a pressure regulating and gas distributing plate, a safe pressurizing module, a gas distributing control module, an air tightness module, a liquid oxygen / liquid methane storage tank and a gas discharging module. Wherein the nitrogen gas source is connected with the pressure-regulating gas distribution plate through the gas supply pipeline of the gas storage tank to carry out gas distribution and pressure regulation, and the pressure-regulating gas distribution plate is sequentially connected with the safety pressurization module, the gas distribution control module and the liquid oxygen / liquid methane storage tank through the nitrogen pressurization pipeline in the gas supply direction to realize pressurization gas distribution. The liquid oxygen / liquid methane storage tank is connected with a gas discharging module which is used for safely discharging gas in the storage tank. According to the system, air tightness detection can be carried out on the pressurization pipeline through the air tightness module before testing, and the control accuracy of the pressurization process is guaranteed. And due to the arrangement of the multiple pressurization pipelines, flexible adjustment can be conducted according to pressurization requirements, and the pressurization accuracy and stability are guaranteed.

The application provides a multifunctional test system of a liquid oxygen-methane engine test stand, which comprises a gas path system, a liquid path system, a test station and a control module. The gas path system and the liquid path system are connected by pipelines for gas supply, the liquid path system is connected with the test station for providing liquid fuel required by the test station, and the control module is connected with the gas path system and the liquid path system for controlling the operation of the gas path system and the liquid path system. The liquid path system comprises a liquid oxygen storage module, a liquid methane storage module, a liquid oxygen supercooling module, a liquid methane supercooling module, a liquid oxygen conveying module and a liquid methane conveying module. The multifunctional test system is composed of one gas path system, two liquid path systems and two test stations. The two liquid path systems comprise a high-pressure and low-pressure liquid oxygen liquid path module and a high-pressure and low-pressure liquid methane liquid path module, which are connected with one gas path system for gas supply, can convey medium according to requirements, improve the resource sharing of the test equipment, reduce the total cost of equipment construction and maintenance, and improve the efficiency of engine test.

The invention relates to the technical field of natural gas cryogenic helium extraction, in particular to a natural gas cryogenic helium extraction system and method. The system comprises a heat exchange unit, a helium extraction unit and a pressurization unit, the heat exchange unit comprises a main heat exchanger connected with the helium extraction unit and the pressurization unit, and a supercooling heat exchanger connected with the main heat exchanger and the helium extraction unit. After the helium extraction unit separates the material, a helium material flow is formed at the top, and a liquid methane material flow is formed at the bottom; wherein the helium material flow serves as a cold source, enters the supercooling heat exchanger through the second heat exchange pipeline, enters the main heat exchanger through the second conveying pipeline after heat exchange of the supercooling heat exchanger, and obtains a crude helium material flow after heat exchange of the main heat exchanger; and S3, the liquid methane material flow is divided into a material flow I entering the main heat exchanger and a material flow II entering the supercooling heat exchanger. Helium extraction of natural gas can be achieved, the technological process is simple, and energy consumption is low.

Process and device for producing nitrogen-purified liquid methane from a feed gas stream containing at least 98 mol % of methane and between 0.1 and 2 mol % of nitrogen, in which the feed gas stream is cooled to a temperature of between 110 K and 200 K in a first heat exchanger in countercurrent with a stream of nitrogen vapour to produce a cooled stream, a bath of liquid nitrogen is in heat exchange with the cooled stream via a second heat exchanger through which the cooled stream passes, the liquid nitrogen bath producing nitrogen vapour supplied to the first heat exchanger to produce the cooled stream, the cooled stream leaving the second heat exchanger is introduced into a distillation column with a view to its distillation, and a liquid containing at least 99.5 mol % of methane is withdrawn from the bottom of the distillation column as the final product.

The invention belongs to the technical field of low-temperature propellant filling, and discloses a test system and method for transient filling of a large-cavity pipeline with test liquid methane. The test system for testing the liquid methane transient filling large-cavity pipeline comprises a liquid methane storage unit, a liquid methane supply unit, a nitrogen supply unit, a liquid methane pressurization unit, a liquid methane filling unit, a liquid methane recovery unit, a liquid methane PLC control unit, a liquid methane visual observation unit and a data monitoring unit. According to the invention, the experimental test can be carried out in the process of filling the normal-temperature large-cavity pipeline with liquid methane, and the pipeline flow and the temperature and pressure values of each section of the pipeline in the filling process are obtained, so that the change of each physical quantity in the pipeline in the starting process of a rocket engine is accurately predicted, and a reasonable ignition time sequence is determined.

The invention relates to a subcooler for conveying liquid methane and a using method. The liquid methane subcooler is simple in structure, high in reliability, high in temperature and flow adjusting capacity and high in adjusting precision. The liquid methane subcooler comprises a shell and a heat exchange mechanism, the shell comprises an upper sealing head, a straight barrel and a lower sealing head, the upper sealing head is provided with a liquid methane inflow pipe, a liquid methane outflow pipe, a gas medium pressurizing pipe, a hot gas medium blow-off pipe and a gas medium discharge pipe, and an adjusting butterfly valve is installed on a pipe opening of the gas medium discharge pipe; the heat exchange mechanism comprises an inlet distribution cavity, a heat exchange pipe, an outlet collection cavity and a fixing plate, the heat exchange pipe is fixedly arranged in the heat exchange area through the fixing plate, the inlet distribution cavity is arranged at one end of the heat exchange pipe in a sealed mode, the outlet collection cavity is arranged at the other end of the heat exchange pipe in a sealed mode, and the lower end socket is provided with a liquid medium inflow pipe and a liquid medium outflow pipe; the subcooler is provided with a control system.

A system for marine electricity generation and solid carbon production includes an offshore marine platform on which is mounted a regassification system for regassification of liquid methane; a methane splitting system producing solid carbon and gaseous hydrogen; and a power generation system producing electricity and exhaust heat. A first marine vessel is moored adjacent the marine platform for delivery of the liquid methane, and a second marine vessel is moored adjacent the marine platform for removal of the solid carbon produced by the methane splitting system. The hydrogen produced from the methane splitting system is used in a fuel stream for the power generation system. The exhaust heat from the power generation system is utilized in the methane splitting process. Also mounted on the marine platform is a solid carbon handling system disposed to manage the large amount of solid carbon resulting from the methane splitting process.