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WO2019185968A1 - Disposition de réservoir de carburant dans un navire marin et procédé de commutation entre une atmosphère inerte et de l'air dans un compartiment de raccordement de réservoir d'un réservoir de carburant gnl - Google Patents

Disposition de réservoir de carburant dans un navire marin et procédé de commutation entre une atmosphère inerte et de l'air dans un compartiment de raccordement de réservoir d'un réservoir de carburant gnl Download PDF

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Publication number
WO2019185968A1
WO2019185968A1 PCT/FI2018/050223 FI2018050223W WO2019185968A1 WO 2019185968 A1 WO2019185968 A1 WO 2019185968A1 FI 2018050223 W FI2018050223 W FI 2018050223W WO 2019185968 A1 WO2019185968 A1 WO 2019185968A1
Authority
WO
WIPO (PCT)
Prior art keywords
pressure
connection space
tank
tank connection
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/FI2018/050223
Other languages
English (en)
Inventor
Emanuele D'URSO
Tomi PRITTINEN
Rasmus NYBO
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wartsila Finland Oy
Original Assignee
Wartsila Finland Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wartsila Finland Oy filed Critical Wartsila Finland Oy
Priority to PCT/FI2018/050223 priority Critical patent/WO2019185968A1/fr
Publication of WO2019185968A1 publication Critical patent/WO2019185968A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B11/00—Interior subdivision of hulls
    • B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B17/00—Vessels parts, details, or accessories, not otherwise provided for
    • B63B17/0027—Tanks for fuel or the like ; Accessories therefor, e.g. tank filler caps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/035—Orientation with substantially horizontal main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F17C2203/0329—Foam
    • F17C2203/0333—Polyurethane
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F17C2203/0643—Stainless steels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0103—Exterior arrangements
    • F17C2205/0111—Boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/0176—Details of mounting arrangements with ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0153—Details of mounting arrangements
    • F17C2205/018—Supporting feet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0338—Pressure regulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/035—Dealing with losses of fluid
    • F17C2260/037—Handling leaked fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/042—Reducing risk of explosion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0102—Applications for fluid transport or storage on or in the water
    • F17C2270/0105—Ships

Definitions

  • the present invention relates to a fuel tank arrangement in a marine vessel for storing LNG- fuel and a method of switching between inert and air atmosphere in a tank connection space of an LNG- fuel tank. More particularly, the present invention relates to such an LNG- fuel tank arrangement that the tank comprises at least one shell, a heat insulation and a tank connection space arranged at an end or at a side of the LNG- fuel tank, the tank connection space being, most of the time, provided with inert atmosphere.
  • NG is a gas, but it can be liquefied by cooling it down to -162°C. In liquid form the specific volume is reduced sig nificantly, which allows a reasonable size of storage tanks relative to energy content.
  • the burning process of NG is clean. Its high hydrogen-to-coal ratio (the highest among the fossil fuels) means lower C0 2 emissions compared with oil-based fuels.
  • NG is liquefied, all sulphur is removed, which means zero SOx emissions.
  • the clean burning properties of NG also significantly reduce NOx and particle emissions compared with oil- based fuels. Particularly in cruise vessels, ferries and so called ro-pax vessels, where passengers are on board, the absence of soot emissions and visible smoke in the ex haust gases of ship's engines is a very important feature.
  • Non-pressurized prior art LNG tanks have normally only a single wall or shell cov ered with a heat insulation of, for instance, polyurethane.
  • Pressurized prior art LNG tanks have an inner wall or shell of stainless steel and an outer wall or shell spaced at a dis tance from the inner shell. The inner and outer shells define an insulation space there- between.
  • the LNG tank is provided, for emptying the tank, with at least one pipe of stain less steel connected at its first end to the LNG tank and at its second end to a tank connection space arranged at a side or at an end of the tank, either as an extension of the tank or as a separate chamber at a short distance from the tank.
  • the tank connection space is normally a gas tight enclosure containing all tank connections, fittings, flanges and tank valves. It is constructed of cryogenic temperature resistant materials, it has a bilge well with a high level indicator and a low temperature sensor.
  • the tank connection space (TCS) is not normally accessible, it may not be entered by personnel unless checked for sufficient oxygen and absence of explosive atmosphere. For safety reasons the TCS is provided with permanent gas detection, fixed fire detection and mechanical forced ventilation, which changes air 30 times an hour.
  • an object of the present invention is to design such an LNG- fuel tank ar rangement for a marine vessel that at least one of the above mentioned problems is solved.
  • Another object of the present invention is to design an LNG- fuel tank arrange ment for a marine vessel wherein the use of continuous mechanical ventilation is avoided.
  • a further object of the present invention is to design such an LNG- fuel tank ar rangement that the tank connection space thereof is provided with inert atmosphere whenever the TCS is closed, i.e. not occupied by service and/or maintenance personnel.
  • At least one object of the present invention is substantially met by a fuel tank arrangement in a marine vessel for storing LNG- fuel, the arrangement comprising an LNG- fuel tank, a tank connection space provided in communication with the LNG- fuel tank, the tank connection space being provided with a ventilation inlet having a first fire damper valve, a ventilation outlet having a second fire damper valve and at least one blower arranged in one of the ventilation inlet and the ventilation outlet, and a vent mast arranged in communication with both the LNG- fuel tank along a line and the tank con nection space along a discharge line, wherein the tank connection space is provided with an inert gas inlet for introducing inert gas from an inert gas source into the tank connec- tion space.
  • At least one object of the present invention is substantially also met by a method of switching between inert and air atmosphere in a tank connection space of an LNG- fuel tank, the tank connection space being provided with a ventilation inlet having a first fire damper valve, a ventilation outlet having a second fire damper valve and at least one blower arranged in one of the ventilation inlet and the ventilation outlet, and a vent mast arranged in communication with both the LNG- fuel tank and the tank connec tion space, the method comprising initial steps of
  • the fuel tank arrangement of the present invention offers at least some of the following advantages:
  • Figure 1 illustrates schematically a side view of a marine vessel having an LNG- fuel tank of the present invention on the deck thereof
  • Figure 2 illustrates schematically a longitudinal cross-section of an LNG- fuel tank in ac cordance with a first preferred embodiment of the present invention.
  • Figure 1 illustrates schematically and in a very simplified manner a marine vessel 10 with an LNG- fuel tank 12 in accordance with a first preferred embodiment of the present invention provided on the deck thereof.
  • the LNG- fuel tank may also be positioned below the deck.
  • the Figure shows also the internal combustion engine 14 receiving fuel from the LNG- fuel tank 12 and the drive means 16 coupled to both the engine and the propeller 18.
  • the drive means may here comprise either a mechanical gear or a generator - electric drive combination.
  • FIG. 2 illustrates schematically the basic construction of the LNG- fuel tank 12 in accordance with a preferred embodiment of the present invention.
  • the fuel tank 12 is, as an example, formed of an inner shell 20, an outer shell 22 and a heat insulation 24 therebetween.
  • a so called tank connection space 26 is arranged at an end of the fuel tank 12 .
  • the tank connection space may as well be located at a side of the LNG- fuel tank, and not necessarily as an extension of the shell of the tank but also at a distance from the shell of the tank, i.e. as a separate chamber at a side or at an end of the LNG- fuel tank.
  • the tank connection space 26 is, preferably, but not necessarily, provided with heat insulation 28.
  • the tank connection space 26 houses normally an emergency pressure relief valve 30, which opens a vent connection along a line 30’ from the top of the LNG- fuel tank 12 to the vent mast 32 in case pressure in the tank 12 exceeds a predetermined value.
  • the tank connection space 26 also houses a cryogenic pump for providing the engine with the fuel it needs, an evaporator for evaporating the liquid fuel to gaseous state and a fuel valve unit for controlling the gas feed to the engine, just to mention a few components found in the TCS.
  • the TCS 26 further includes a standard ventilation equipment including an air or ventilation inlet line 34 with a first fire damper valve 34’ and a ventilation outlet line 36 with a second fire damper valve 36’ leading from the TCS to the vent mast 32, and a blower 38, which is positioned in either the ventilation inlet line 34 or the ventilation outlet line 36 for ventilating the tank connection space 26.
  • the first and the second fire damper valves 34’ and 36’ are in normal operating conditions always open and are automatically closed only if fire is detected in the tank connection space.
  • the tank connection space 26 is provided with a first closing valve 34” in the ventilation inlet line 34 and a second closing valve 36” in the ventilation outlet line 36 so that the tank connection space 26 may be closed from outside atmosphere for inerting thereof.
  • the tank connection space 26 further comprises an inlet 40 for an inert gas and a gas outlet 42 for discharging gas from the tank connec tion space 26.
  • the inert gas inlet 40 is connected via an inert gas line 44 and a first pressure regulating valve 44’ therein to a source 46 of inert gas arranged, preferably but not necessarily, outside the tank connection space 26.
  • the gas outlet 42 is connected via a discharge line 48 and a second pressure regulating valve 48’ therein to the vent mast 32.
  • the discharge line 48 is provided with an oxygen analyser 50 for monitoring the oxygen concentration of the gas discharged from the TCS 26.
  • the oxygen analyser may also be located in connection with the tank connection space 26, i.e. upstream of the second pressure regulating valve 48’ or the discharge line 48.
  • the tank con nection space 26 comprises also a pressure relief valve 52’, which connects the interior of the tank connection space 26 via a pressure relief line 52 to the vent mast 32.
  • the relief valve 52’ is set to open when the pressure in the tank connection space exceeds, for instance due to a raised temperature, the maximal allowed TCS- pressure pO.
  • the maximal allowed pressure pO in the TCS is usually between 0.1 and 0.5 barg (gauge pressure) or 1.1 - 1.5 bar absolute pressure, preferably between 0.2 - 0.4 barg.
  • the first pressure regulating valve 44’ is a pilot operated valve that receives its control signal from the pressure of the tank connection space 26 such that the first pressure regulating valve 44’ opens when pressure in the TCS goes below upper limit pressure p1 , i.e. the first pressure regulating valve 44’ allows inert gas enter the TCS 26, when the pressure in the TCS is below p1 .
  • the second pres sure regulating valve 48’ is also a pilot operated valve that receives its control signal from the pressure of the tank connection space 26. The second pressure regulating valve 48’ opens, i.e. bleeds gas from the TCS 26 to the vent mast 32, when the pressure in the TCS is above a predetermined lower limit pressure p2. Thus p1 >p2.
  • the first pressure reg ulation valve 44’ receives its control signal from the pressure of the tank connection space 26 such that it is adjusted or instructed to close when an upper pressure limit p1 is reached, in other words, it remains open below pressure of p1.
  • the second pressure regulating valve 48’ receives its control signal from the pressure of the tank connection space 26 such that it is adjusted or instructed to open at a pressure of px and remain open until pressure has reduced to p2, whereby px>p2. Pressures p1 and px may be equal or different, the only thing that matters is that p1 and px are greater than p2.
  • the opening of the second pressure regulating valve 48’ at pressure of px is used to instruct the first pressure regulating valve 44’ to close such that the first pres sure regulating valve 44’ remains closed until the second pressure regulating valve 48’ closes at a pressure of p2.
  • the closing of the second pressure regulating valve 48’ returns the control of the first pressure regulating valve 44’ to the TCS pressure, whereby the first pressure regulating valve 44’ opens and pressure in the TCS increases until the second pressure regulating valve 48’ receives its control signal from the TCS pressure at px, opens and takes over the control of the first pressure regulating valve 44’ closing
  • the closing of the first pressure regulating valve 44’ at a pressure of p1 is used to instruct the second pressure regulating valve 48’ to open, to take over the control and to keep the first pressure regulating valve 44’ closed until the second pressure regulating valve 48’ closes at a pressure p2. Thereafter, the control of the first pressure regulating valve 44’ is given to the TCS pressure, so that the first pressure regulating valve 44’ opens allowing the pressure in the TCS to increase and keeps the second pressure regulating valve 48’ closed until pressure of p1 is reached.
  • the oxygen concentration has an effect on the functioning of the first and the second pressure regulating valves 44’ and 48’ as will be discussed later on.
  • the ventilation inlet line 34 and the ventilation outlet line 36 are closed by means of the first and second closing valves 34” and 36” and the first and the second pressure regu lating valves 44’ and 48’ are activated, i.e. the valves 44’ and 48’ receive their control signal from at least the pilot pressure of the TCS.
  • the inerting of the TCS may be per formed by two basically different ways, i.e. by continuous purging or by using pressuriza tion cycles.
  • the first way includes keeping both the first and the second pressure regulating valves 44’ and 48’ open, i.e. continuously purging the TCS until the oxygen concentration of the gas in the tank connection space 26, i.e. upstream of the discharge line 48, or of the gas discharged from the tank connection space 26 downstream of the second pres sure regulation valve 48’ in the discharge line 48 is, determined by the oxygen analyser 50, reduced below maximum allowable oxygen concentration.
  • the first preferred operation scheme is used such that the activation of the pressure regulating valves 44’ and 48’ means that as long as the oxygen concentration in the TCS, i.e.
  • valves 44’ and 48’ remain open, and only after the maximum allowable oxygen concentration is reached either the first pressure regulation valve 44’ or the sec ond pressure regulating valve 48’ closes, i.e. after having received control signal from the oxygen analyser 50.
  • the second pressure regulating valve 48’ closes, too, as soon as the pressure in the TCS is reduced below p2, and in the latter instance, the first pressure regulating valve 44’ closes when the pressure in the TCS reaches p1.
  • the TCS pressure after inerting is p2 and in the latter instance p1.
  • the oxygen concentration may, optionally, be followed such that the first or the second pressure regulating valve 44’ or 48’ is manually (in place of automatic control) closed.
  • both valves 44’ and 48’ are inactivated, i.e. set to a stand-by mode from which they would be re-activated by increase in the oxygen concen tration or reduction of pressure in the TCS 26.
  • the pressure control of the tank connection space 26 is left for the pressure relief valve 52.
  • the second way includes utilizing pressurisation cycles which requires that the operation of the valves are set in a manner different from the first operating scheme.
  • the first pressure regulating valve 44’ used for introducing inert gas into the tank connection space 26 opens as the pressure in the TCS is atmospheric pressure plthe second pressure regulating valve 48’ remains closed until the pressure in the TCS exceeds the predetermined pressure p1 p1 causing opening of the second pressure reg ulating valve 48’ and, as a function thereof, closing of the first pressure regulating valve 44’, whereby the pressure is allowed to decrease below the second predetermined value p2, which causes the closing of the second pressure regulating valve 48’ and, as a func tion thereof, opening of the first pressure regulating valve 44’.
  • the first pressure regulating valve 44’ used for introducing inert gas into the tank connection space 26 opens as the pressure in the TCS is atmos- pheric pressure and thus below p1 and the second pressure regulating valve 48’ remains closed until the pressure in the TCS exceeds the predetermined pressure p1 causing closing of the first pressure regulating valve 44’ and, as a function thereof, opening of the second pressure regulating valve 48’.
  • the first pressure regulating valve 44’ remains closed, whereby the TCS pressure is allowed to decrease below the second predeter- mined value p2, which causes the closing of the second pressure regulating valve 48’ and, as a function thereof, opening of the first pressure regulating valve 44’.
  • the opera tion is continued until the oxygen concentration of the gas in the tank connection space 26, i.e. upstream of the discharge line 48, or of the gas discharged from the tank connec tion space 26 downstream of the second pressure regulation valve 48’ in the discharge line 48 is, determined by the oxygen analyser 50, reduced below maximum allowable oxygen concentration, i.e. such an oxygen concentration is reached that combustion of NG is not any more possible irrespective of the concentration of the fuel.
  • both valves 44’ and 48’ may be inactivated, i.e. set to a stand-by mode from which they would be re-activated by increase in the oxygen concentration or reduction of pressure in the TCS.
  • the pressure control of the tank connection space 26 is left for the pressure relief valve 52.
  • the checking of the functionality of the fire damper and the closing valves is performed such that first the fire damper valve 34’ or 36’ is closed and the closing valve 34” or 36” is opened, and the inlet line 34 or the outlet 36 leading away from the closing valve 34” or 36”, i.e. in a direction opposite to the TCS 26, is monitored to see if any leak from the TCS may be noticed. If not, the (inner) fire damper valve 34’ or 36’ appears to be in good condition, whereafter the closing valve 34” or 36” is closed and the fire damper valve 34’ or 36’ opened. Next, again the inlet line 34 or the outlet line 36 leading away from the closing valve 34” or 36”, i.e.
  • the closing valve 34” or 36 is also in good condition, and may be closed. Naturally, if any leakage is detected through any one of the fire damper and closing valves 34’, 34”, 36’ or 36”, or any other problems in their operation is found out, the malfunctioning valve needs to be replaced or main tained.
  • the inert gas used for inerting the tank connection space 26 is preferably nitrogen, though also argon may be used.
  • the inert gas source 46 is either a generator separating the inert gas from air, or a pressurized container carrying the inert gas. In case the generator is used, it is preferable to store the inert gas in a buffer tank for later use.
  • pressures p1 , p2, px or pO do not necessarily refer to the same pressure values in each and every example, but they may change.
  • p2 ⁇ p1 ⁇ p0 and p2 ⁇ px ⁇ p0 in each exemplary embodiment, running scheme or variation.
  • the first and the second pressure regulation valves 44’ and 48’ may be positioned either inside or outside the tank connection space.
  • Figure 2 discusses a tank and a tank connection space with an inner and an outer shell the present invention is as well applicable to LNG- tanks having only an inner shell with a heat insulation thereon.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

La présente invention concerne un disposition de réservoir de carburant d'un navire marin comportant un réservoir (12) de carburant GNL, un compartiment (26) de raccordement de réservoir placé en communication avec le réservoir (12) de carburant GNL, le compartiment (26) de raccordement de réservoir étant muni d'une canalisation (34) d'entrée de ventilation dotée d'un premier clapet coupe-feu (34'), d'une canalisation (36) de sortie de ventilation dotée d'un second clapet coupe-feu (36') et d'au moins une soufflante (38) disposée dans une canalisation parmi la canalisation (34) d'entrée de ventilation et la canalisation (36) de sortie de ventilation, et un mât (32) d'aération disposé en communication avec à la fois le réservoir (12) de carburant GNL et le compartiment (26) de raccordement de réservoir, le compartiment (26) de raccordement de réservoir étant muni d'une entrée (40) de gaz inerte servant à introduire un gaz inerte provenant d'une source (46) de gaz inerte dans le compartiment (26) de raccordement de réservoir.
PCT/FI2018/050223 2018-03-26 2018-03-26 Disposition de réservoir de carburant dans un navire marin et procédé de commutation entre une atmosphère inerte et de l'air dans un compartiment de raccordement de réservoir d'un réservoir de carburant gnl Ceased WO2019185968A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2018/050223 WO2019185968A1 (fr) 2018-03-26 2018-03-26 Disposition de réservoir de carburant dans un navire marin et procédé de commutation entre une atmosphère inerte et de l'air dans un compartiment de raccordement de réservoir d'un réservoir de carburant gnl

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FI2018/050223 WO2019185968A1 (fr) 2018-03-26 2018-03-26 Disposition de réservoir de carburant dans un navire marin et procédé de commutation entre une atmosphère inerte et de l'air dans un compartiment de raccordement de réservoir d'un réservoir de carburant gnl

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WO2019185968A1 true WO2019185968A1 (fr) 2019-10-03

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Cited By (4)

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Publication number Priority date Publication date Assignee Title
WO2021183822A1 (fr) * 2020-03-11 2021-09-16 Ockerman Automation Consulting, Inc. Ensemble évent à profil bas pour bateau
US11852256B2 (en) 2020-03-11 2023-12-26 Ockerman Automation Consulting, Inc. Flush-mount valve
US12297960B1 (en) * 2022-06-02 2025-05-13 National Technology & Engineering Solutions Of Sandia, Llc Flow assist vent mast
WO2025261992A1 (fr) * 2024-06-19 2025-12-26 Linde Gmbh Procédé et appareil pour surveiller la teneur en un gaz

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WO2015040268A1 (fr) * 2013-09-20 2015-03-26 Wärtsilä Finland Oy Nouveau dispositif d'accès à un compartiment de stockage de carburant de gaz naturel liquéfié (gnl)
WO2015040269A1 (fr) * 2013-09-20 2015-03-26 Wärtsilä Finland Oy Agencement de système de commande et d'auxiliaires pour système de stockage de carburant de gaz naturel liquéfié
WO2015040267A1 (fr) * 2013-09-20 2015-03-26 Wärtsilä Finland Oy Système de stockage de carburant et unité de vanne de gaz intégrée
WO2016097460A1 (fr) * 2014-12-16 2016-06-23 Wärtsilä Finland Oy Réservoir de gaz naturel liquéfié et système de raccordement d'au moins un tuyau entre un réservoir de gaz naturel liquéfié et un espace de raccordement de réservoir de celui-ci

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WO2015040268A1 (fr) * 2013-09-20 2015-03-26 Wärtsilä Finland Oy Nouveau dispositif d'accès à un compartiment de stockage de carburant de gaz naturel liquéfié (gnl)
WO2015040269A1 (fr) * 2013-09-20 2015-03-26 Wärtsilä Finland Oy Agencement de système de commande et d'auxiliaires pour système de stockage de carburant de gaz naturel liquéfié
WO2015040267A1 (fr) * 2013-09-20 2015-03-26 Wärtsilä Finland Oy Système de stockage de carburant et unité de vanne de gaz intégrée
WO2016097460A1 (fr) * 2014-12-16 2016-06-23 Wärtsilä Finland Oy Réservoir de gaz naturel liquéfié et système de raccordement d'au moins un tuyau entre un réservoir de gaz naturel liquéfié et un espace de raccordement de réservoir de celui-ci

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021183822A1 (fr) * 2020-03-11 2021-09-16 Ockerman Automation Consulting, Inc. Ensemble évent à profil bas pour bateau
US11279458B2 (en) 2020-03-11 2022-03-22 Ockerman Automation Consulting, Inc. Low profile vent assembly for a boat
US11852256B2 (en) 2020-03-11 2023-12-26 Ockerman Automation Consulting, Inc. Flush-mount valve
US12297960B1 (en) * 2022-06-02 2025-05-13 National Technology & Engineering Solutions Of Sandia, Llc Flow assist vent mast
WO2025261992A1 (fr) * 2024-06-19 2025-12-26 Linde Gmbh Procédé et appareil pour surveiller la teneur en un gaz

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