Invention relates to a method of reliquefying of boil-off gas stream obtained from liquefied gas in a gas storage (12) of a floating storage unit (1), the method comprising steps of leading boil-off gas from the gas storage (12) to a gas compressor (14) and increasing pressure of the boil-off gas, providing pressurized boil-off gas, leading the pressurized boil-off gas to a first condenser (16), and reliquefying at least part of the pressurized boil-off gas forming a first reliquefied and pressurized gas portion and remaining portion of the pressurized boil-off gas, reliquefying at least part of the remaining portion of the pressurized boil-off gas in a second condenser (18) forming a second reliquefied and pressurized gas portion, expanding majority of the first and the second reliquefied and pressurized gas portions to lower pressure and introducing the reliquefied gas portions back into the gas storage (12), wherein the second condenser (18) comprises a thermoelectric cooler (18.1,18.2,18.3) and condensing power of the thermoelectric cooler (18.1,18.2,18.3) is controlled by controlling electric power input to the thermoe- lectric cooler (18.1,18.2,18.3).
Invention relates method of cracking ammonia comprising - feeding a first portion of ammonia into a burner (14) in arranged to a cracking vessel (12); - feeding gas containing oxygen to the burner (14); - combusting the first portion of ammonia forming a combustion zone (101) in the cracking vessel (12) producing heat; - feeding a second portion of ammonia into a cracking zone (102) of the cracking vessel (12) outside the combustion zone (101), and - cracking the second portion of ammonia by utilizing the heat produced by the combustion of the first portion of ammonia and producing product gas comprising hydrogen and nitrogen from the second portion of ammonia. Invention relates also to racking arrangement (10) for cracking ammonia.
C01B 3/04 - Production of hydrogen or of gaseous mixtures containing hydrogen by decomposition of inorganic compounds, e.g. ammonia
B01J 19/26 - Nozzle-type reactors, i.e. the distribution of the initial reactants within the reactor is effected by their introduction or injection through nozzles
3.
A METHOD OF INERTING A FUEL DELIVERY SYSTEM IN A MARINE VESSEL AND AN INERTING SYSTEM FOR INERTING A FUEL DELIVERY SYSTEM IN A MARINE VESSEL
Invention relates to a method of inerting a fuel delivery system (200) in a marine vessel, the fuel delivery system (200) having an internal fuel space, in which method inert gas is admitted to the internal fuel space of the fuel delivery system (200) at a first location (L1) of the fuel delivery system (200) and fuel is replaced with the inert gas and is led out from the internal fuel space of the fuel delivery system (200) at a second location (L2.1.L2.2) of the fuel delivery system (200) wherein fuel is replaced or diluted by the inert gas. Fuel is led from the second location (L2.1.L2.1) as an inlet stream to a buffer vessel (232,234), from which buffer vessel (232,234) fuel, or mixture of fuel and inert gas, is removed as an outlet stream to a fuel processing vessel (10) such that the outlet stream flow is in asynchrony with the inlet stream flow, and that the fuel is oxidized in the processing vessel (10).
C10G 9/00 - Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
F02M 25/00 - Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
F02M 21/02 - Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
B63H 21/38 - Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
F17C 1/00 - Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
4.
A LIQUEFIED GAS SYSTEM AND A METHOD FOR OPERATING A LIQUEFIED GAS SYSTEM
The disclosure relates to a liquefied gas system, comprising at least one liquefied gas cargo tank (10) for storing liquefied gas, wherein the system comprises a recondensing circuit for recondensing boil-off gas (BOG) which is boiled off in the cargo tank (10), wherein the liquefied gas system comprises at least one liquefied gas fuel tank (28) for storing and feeding liquefied gas fuel to at least one engine (34) via a fuel supply line (117), wherein the fuel supply line (117) is connected to a BOG recondenser (14) in the recondensing circuit for absorbing heat from the recondensing circuit to the fuel conveyed in the fuel supply line (117). The disclosure further relates to a method for operating a liquefied gas system.
Invention relates to an arrangement (10) for managing temperature of liquefied gas fuel in a fuel tank of a marine vessel (14), the arrangement (10) comprising - a fuel tank (12), - a main fuel feed line (18) extending from bottom area (12') of the fuel tank (12) to a gas consumer (16), - a fuel transfer pump (22) arranged to the main fuel feed line (18), - a first thermoelectric heat exchanger (24) comprising a first heat exchange fluid flow path (24.1') and a second heat exchange fluid flow path (24.2'), and a num- ber of thermo electric generator cells (24.3) arranged in heat transfer communi- cation with both the first heat exchange fluid flow path (24.1') and the second heat exchanger fluid flow path, - the first heat exchange fluid flow path (24.1') being coupled to the main fuel feed line (18) downstream the fuel transfer pump (22), - a second fuel line (18') being coupled to the second heat exchange fluid flow path (24.2'), the second fuel line (18') being arranged to lead fuel to the tank (12) via the first thermoelectric heat exchanger (24).
The disclosure relates to a system for removing ammonia from an ammonia-containing gas, the system comprising: an ammonia scrubber (10), the ammonia scrubber (10) containing an inlet (101) for ammonia-containing gas, a scrubber liquid inlet (102), a treated gas outlet (103) and at least one scrubber liquid outlet (104) connected in a closed loop to at least one pump (11), an electrolytic cell (12) for regeneration of scrubber liquid, and the scrubber liquid inlet (102), the electrolytic cell (12) comprising a scrubber liquid inlet (105), at least one anode (13) and at least one cathode (14) connected to at least one power source (15), and a scrubber liquid outlet (106). The disclosure further relates to a method for removing ammonia from an ammonia-containing gas.
B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
Invention relates to a liquefied fuel discharge assembly (20) in a storage tank (10), the tank (10) comprising a storage space (12) having a bottom wall, where-in the fuel gas discharge assembly (20) comprising a fuel discharge pipe (30) which opens into the storage space (12) of the tank (10) and extends from the tank (10) through the bottom wall lead-through (22) in a sealed manner, a valve unit (26) arranged to the fuel discharge pipe (30) inside the storage tank (10), an enclosure (38) arranged inside the storage tank (10) enclosing the bottom wall lead-through (22) in a sealed manner, the valve unit (26) is arranged into the enclosure (38), which is enclosing the bot-tom wall lead-through (22), and the fuel discharge pipe (30) extends from the tank (10) space to the valve unit (26) in the enclosure (38) and further from the valve unit (26) inside the enclosure (38) to the lead-through (22) and out of the tank (10) in a sealed manner.
F17C 3/02 - Vessels not under pressure with provision for thermal insulation
F17C 9/00 - Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
F17C 13/12 - Arrangements or mounting of devices for preventing or minimising the effect of explosion
8.
A BOIL-OFF GAS RELIQUEFACTION SYSTEM, A METHOD FOR RELIQUEFACTION OF BOIL-OFF GAS IN A RELIQUEFACTION SYSTEM AND A METHOD FOR OPERATING A BOIL-OFF GAS RELIQUEFACTION SYSTEM
The disclosure relates to a boil-off gas (BOG) reliquefaction system comprising at least one liquefied natural gas (LNG) cargo tank (10), a BOG preheater (11), at least one BOG compressor (12) with a BOG compressor cooler (13), a BOG recondenser (14) with a refrigeration cycle, wherein the BOG reliquefaction system comprises a separate liquid circuit with circulation of a liquid phase heat transfer fluid (HTF) for preheating of BOG from the LNG cargo tank (10) before the BOG entering the BOG compressor (12), the separate liquid circuit comprising a liquid pump (15) configured to pump the HTF, the BOG preheater (11) configured for heat exchanging between the BOG and the HTF, the BOG recondenser (14) located downstream the BOG preheater (11), and a liq-uid trim heater (16) located downstream the BOG recondenser (14) configured for heat-ing the HTF. The disclosure further relates to a method for reliquefaction of boil-off gas (BOG) in a reliquefaction system and a method for operating a boil-off gas (BOG) reliquefaction system.
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
F17C 7/00 - Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
9.
METHOD AND SYSTEM FOR STORAGE AND TRANSPORT OF LIQUEFIED PETROLEUM GASES
The present invention relates to a method and system for storage and transport of liquified petroleum gases (LPG) on LPG carriers where boil off gas from the LPG is compressed in a cargo compressor with minimum two stages of compression, condensed in a cargo condenser and any non-condensable gases can be separated and/or gas and liquid can be mixed in a liquid receiver. A warm and mixed two-phase condensate stream leaving the liquid receiver is heat exchanged by glide refrigeration in at least one condensate sub-cooler, and any droplets present in a stream leaving the at least one condensate sub-cooler is removed in at least one droplet separator before being returned to the cargo compressor thus forming a further cooled, compressed stream.
F17C 5/04 - Methods or apparatus for filling pressure vessels with liquefied, solidified, or compressed gases for filling with liquefied gases requiring the use of refrigeration, e.g. filling with helium or hydrogen
F17C 7/00 - Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
10.
LOW EMISSION OIL TANKER FUELED WITH SURPLUS OF VOLATILE ORGANIC COMPOUND (VOC)
A low emission oil tanker apparatus and a method for providing the low emission oil tanker apparatus is disclosed. The low emission oil tanker apparatus of the invention comprises a load tank adapted to carry a load emitting a volatile organic compounds gas, VOC, a VOC capturing and recovery device being arranged to capture at least a first portion of VOC emitted from said load and including a VOC processing device arranged to recover and output at least a second VOC portion of the at least a first portion of VOC as liquefied VOC, LVOC, on a first output and output surplus VOC, SVOC, on a second output, a gas fueled high power otto motor type propulsion engine, OT-SPE, with a fuel gas input, an engine fueling arrangement comprising a LNG storage means, a LNG vaporizer, a vaporizer output arranged to feed vaporized LNG to the fuel gas input, and a fuel gas mixer arranged between the vaporizer output and the fuel gas input and having a second mixer input in SVOC communication with the second output of the gas capturing and recovery device.
F02M 21/02 - Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
B63B 25/08 - Load-accommodating arrangements, e.g. stowing or trimmingVessels characterised thereby for bulk goods fluid
B63H 21/38 - Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
F02M 25/08 - Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
F02B 43/00 - Engines characterised by operating on gaseous fuelsPlants including such engines
F17C 13/00 - Details of vessels or of the filling or discharging of vessels
B63J 99/00 - Subject matter not provided for in other groups of this subclass
A filter device comprises: - a filter element (2) that is insertable into a pipe (9) for filtering a liquid and/or gaseous medium flowing through the pipe (9); - a filter flange (3) surrounding an end portion of the filter element (2) for attachment of the filter device to a corresponding pipe flange of the pipe (9); and - a first and a second pressure measurement connection (4) for connecting a respective first and second chamber formed on opposite sides of the filter element (2) to a respective first and second tapping point (5) on the filter flange (3).
B01D 29/60 - Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups Filtering elements therefor integrally combined with devices for controlling the filtration
12.
Method and system for storage and transport of liquefied petroleum gases
A method for storage and transport of LPG on LPG carriers, in particular two cargoes of different LPG types on same shipment, having reliquefaction units in which vaporized gases are condensed and then returned into at least one cargo tank for the respective LPG cargo type. The method is further comprising: using the reliquefaction units, at a minimum one running, as to condense vapour from the first cargo type; passing the condensed vapour through a heat exchanger; simultaneously flowing vapour from the second cargo type through the heat exchanger as to condense vapour by means of heat exchanging with the condensed vapour; and returning the condensed vapours leaving the heat exchanger back into the respective cargo types. The present invention is also disclosing a system for storage and transport of LPG on LPG carriers.
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F17C 9/02 - Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
F17C 13/00 - Details of vessels or of the filling or discharging of vessels
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
13.
Method and system for storage and transport of liquefied petroleum gases
A method for storage and transport of LPG on LPG carriers, in particular two cargoes of different LPG types on same shipment, having reliquefaction units in which vaporized gases are condensed and then returned into at least one cargo tank for the respective LPG cargo type. The method is further comprising: using the reliquefaction units, at a minimum one running, as to condense vapor from the first cargo type; passing the condensed vapor through a heat exchanger; simultaneously flowing vapor from the second cargo type through the heat exchanger as to condense vapor by means of heat exchanging with the condensed vapor; and returning the condensed vapors leaving the heat exchanger back into the respective cargo types. The present invention is also disclosing a system for storage and transport of LPG on LPG carriers.
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F17C 9/02 - Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
F17C 13/00 - Details of vessels or of the filling or discharging of vessels
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
14.
LNG fuel tank system for at least one gas engine used for ship propulsion
An LNG fuel tank system for at least one gas engine used for ship propulsion is comprising at least one LNG fuel tank (4) and a gas vessel (8), the LNG fuel tank to be-bunkered from an onshore LNG pressure tank filling facility by means of an LNG filling line (1). According to the present invention the LNG fuel tank (4) is a ship low pressure controlled atmospheric pressure LNG tank, and the gas vessel (8) is a single shell non-insulated pressure vessel arranged to accumulate flashed and boil-off gas during LNG bunkering and pressure relieving the LNG fuel tank, respectively, and the gas engines are fuelled from either the gas vessel (8) or the LNG fuel tank (4), dependent on a predefined gas vessel pressure.
A method for storage and transport of LPG on LPG carriers, in particular two cargoes of different LPG types on same shipment, having reliquefaction units (300, 400) in which vaporized gases are condensed and then returned into at least one cargo tank (100) for the respective LPG cargo type. The method is further comprising: using the reliquefaction units (300, 400), at a minimum one running, as to condense vapor from the first cargo type; passing the condensed vapor through a heat exchanger (500); simultaneously flowing vapor from the second cargo type through the heat exchanger (500) as to condense vapor by means of heat exchanging with the condensed vapor; and returning the condensed vapors leaving the heat exchanger back into the respective cargo types. The present invention is also disclosing a system for storage and transport of LPG on LPG carriers.
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F17C 9/02 - Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
F17C 13/00 - Details of vessels or of the filling or discharging of vessels
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
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.
F25J 1/00 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures
F25J 1/02 - Processes or apparatus for liquefying or solidifying gases or gaseous mixtures requiring the use of refrigeration, e.g. of helium or hydrogen
The present invention relates to a process plant and method for cooling and optionally liquefaction of a product gas, particularly for liquefaction of natural gas, based on a closed loop of multi-component refrigerant in heat exchange with the gas to be cooled and optionally condensed. The process plant is comprises at least one primary heat exchanger (20) arranged to cool the product gas directed to the heat exchanger (10), at least one compressor (46) arranged to compress the low level refrigerant directed from the first of the at least two secondary heat exchangers (64), at least one pre-cooling heat exchanger (54) to sub-cool and partly liquefy the compressed refrigerant, at least one phase-separator (60) arranged to separate the partly liquefied multi-component refrigerant into a more volatile fraction and a less volatile fraction, at least two secondary heat exchangers (64, 114), the first of the at least two secondary heat exchangers (64) arranged to cool the more volatile fraction from the phase-separator (62), and the second of the at least two secondary heat exchangers (114) arranged to cool further the more volatile fraction, a throttling device (118) arranged to reduce the pressure of a part of the more volatile fraction to become the low level refrigerant to be heat exchanged in the second of at least two secondary heat exchangers, a throttling device (76) arranged to reduce the pressure of a part of the more volatile fraction to become the low level refrigerant to be heat exchanged in the at least one primary heat exchanger (20), a throttling device (102) arranged to reducing the pressure of the less volatile fraction from the at least one phase-separator (60) to become part of the low level refrigerant, for mixing with the low level refrigerant from the at least one primary heat exchanger (20), and the low level refrigerant from the second of at least two secondary heat exchangers (114) this directed to heat exchange through the first of at the least two secondary heat exchangers (64).
patents
