EP3523567B1 - Unité de stockage de carburant - Google Patents

Unité de stockage de carburant Download PDF

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Publication number
EP3523567B1
EP3523567B1 EP16784947.0A EP16784947A EP3523567B1 EP 3523567 B1 EP3523567 B1 EP 3523567B1 EP 16784947 A EP16784947 A EP 16784947A EP 3523567 B1 EP3523567 B1 EP 3523567B1
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EP
European Patent Office
Prior art keywords
shell
fuel
fuel tank
tank unit
unit
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.)
Active
Application number
EP16784947.0A
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German (de)
English (en)
Other versions
EP3523567A1 (fr
Inventor
Luca BOARO
Andrea Zotti
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Wartsila Finland Oy
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Wartsila Finland Oy
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Publication of EP3523567A1 publication Critical patent/EP3523567A1/fr
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Classifications

    • 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
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/025—Bulk storage in barges or on ships
    • 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
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
    • 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
    • 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
    • F17C2201/0147—Shape complex
    • F17C2201/0157—Polygonal
    • 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
    • F17C2201/0147—Shape complex
    • F17C2201/0166—Shape complex divided in several chambers
    • 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
    • F17C2203/0391—Thermal insulations by vacuum
    • 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
    • F17C2203/0631—Three or more 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
    • 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
    • F17C2205/0352—Pipes
    • 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
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/043—Localisation of the removal point in the gas
    • F17C2223/045—Localisation of the removal point in the gas with a dip tube
    • 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
    • F17C2223/04—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by other properties of handled fluid before transfer
    • F17C2223/042—Localisation of the removal point
    • F17C2223/046—Localisation of the removal point in the liquid
    • 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 unit for storing liquefied gas fuel and liquid fuel comprising a first fuel tank for liquefied gas fuel and a second fuel tank for liquid fuel according to the preamble of claim 1.
  • Internal combustion piston engines which are configured to operate using more than one fuel in the combustion need several fuel systems respectively. This means also that separate fuel tanks are needed for each one of the fuels.
  • an engine is an engine using a first fuel as a main fuel and a second fuel as a pilot fuel for igniting the first fuel.
  • a large gas engine may be used where the main fuel is gaseous fuel which is stored as liquefied gas and the pilot fuel is liquid fuel such as light fuel oil or marine diesel oil.
  • natural gas is in gaseous form in room temperature.
  • the natural gas is typically stored onboard in liquid form as liquefied natural gas.
  • Natural gas can be kept in liquid form by maintaining its temperature below its boiling point, which is approximately - 163 °C.
  • LNG tank is a cylindrical, double-walled or single- walled, insulated tank.
  • WO2016097461 A1 discloses an LNG tank located in a tank hold space of a marine vessel comprising an inner metal shell, an outer metal shell and an isolation space between the shells advantageously containing vacuum.
  • the document also shows schematically the architecture of a known fuel system onboard an LNG-fuelled ship.
  • WO 2016087705 A1 discloses a sea-going vessel which comprises one or more engines, of which at least one is operable using a first fuel and at least one using a second fuel, the engine(s) being configured to receive the first fuel in liquid state and the second fuel in gaseous state or as a supercritical fluid.
  • a first fuel tank for the first fuel is arranged on a first side of the vessel, a second fuel tank for the first fuel is are ranged on a second side of the vessel, and a third fuel tank for the second fuel is arranged between the first fuel tank and the second fuel tank.
  • the fuel tanks are separated by a transverse bulkhead from an engine room of the vessel. As can be observed from the document the positioning the fuel tanks into a marine vessel can be cumbersome and space consuming and the space in the vessel needs to be used as efficiently as possible
  • Document EP 3012509 A1 discloses a horizontal type cylindrical double-shell tank which includes an inner shell and an outer shell.
  • the inner shell includes an inner shell main part storing a liquefied gas.
  • the outer shell forms a vacuum space between the inner shell and the outer shell.
  • the tank includes a tank cover covering the double-shell tank.
  • a space between the double-shell tank and the tank cover may be filled with air.
  • an inert gas is enclosed in the space. Examples of the inert gas include nitrogen and argon.
  • liquefied oxygen By enclosing such an inert gas, in a case where the liquefied gas is, for example, ultracold liquefied hydrogen, liquefied oxygen can be prevented from being generated around tank-supporting units, which are greatly affected by heat from the inner shell.
  • the storage vessel includes at least two concentrically arranged storage tanks, which includes a first storage tank and a second storage tank.
  • the first storage tank surrounds the second storage tank, such that the first storage tank is configured to protect the second storage tank from external environmental conditions
  • Document JP 2002089983 A discloses a regenerative refrigerator and a liquefied gas storage tank for storing liquefied helium and liquefied nitrogen.
  • the storage tank comprises an inner chamber in which liquefied helium surrounded by a vacuum insulation jacket, which in turn is surrounded by a third space where liquefied nitrogen is stored.
  • An object of the invention is to provide a fuel tank in which storage efficiency is considerably improved compared to the prior art solutions.
  • a fuel tank unit is configured to store a first liquid, which is liquefied gas fuel and a second liquid in the common fuel tank unit.
  • the fuel tank unit comprises a first fuel tank for liquefied gas fuel and a second tank for the second liquid.
  • the first fuel tank is enclosed by a first shell and the first shell is enclosed by a second shell wherein a vacuum heat insulation is arranged between the first shell and the second shell, and the second shell is at least partially enclosed by a third shell wherein the fuel tank is arranged between the second shell and the third shell.
  • a fuel tank unit is configured to store liquefied gas fuel and another liquid in the common fuel tank unit.
  • the fuel tank unit comprises a first fuel tank for liquefied gas fuel and a second fuel tank for liquid fuel.
  • the first fuel tank is enclosed by a first shell and the first shell is enclosed by a second shell wherein a vacuum heat insulation is arranged between the first shell and the second shell, and the second shell is at least partially enclosed by a third shell wherein the second fuel tank is arranged between the second shell and the third shell.
  • Such a fuel tank is particularly advantageous in storing fuels for use in marine vessels and land based power plant provided with a large gas engine where the main fuel is gaseous fuel which is stored as liquefied gas and the pilot fuel is liquid fuel such as light fuel oil or marine diesel oil.
  • the second shell is completely enclosed by the third shell where the volume of the second tank may be maximized while having both the main fuel and the pilot for a dual fuel engine stored using a footprint area of substantially one fuel tank only.
  • the fuel tank unit is of elongated form having a length, width, height and longitudinal axis lengthwise the unit, and the second shell has, perpendicular to the longitudinal axis, a circular cross section.
  • the third shell has, perpendicular to the longitudinal axis, a cross section which advantageously is arranged inside a rectangle the sidewalls of which are tangential to the second shell.
  • the fuel tank unit is of elongated form having a length, width, height and longitudinal axis lengthwise the unit, and the second shell has, perpendicular to the longitudinal axis, a circular cross section and that the third shell has, perpendicular to the longitudinal axis, a rectangular cross sectional shape.
  • At least one wall of the third shell is against to the second shell.
  • At least two walls of the third shell are against to the second shell.
  • the at least two walls of the third shell are in the vicinity of the second shell.
  • the at least two walls of the third wall are tangential to the second shell.
  • all of the walls of the third shell are tangential to the second shell.
  • the first and the second shells have, perpendicular to the longitudinal axis, a circular cross section.
  • the heat insulation between the first wall and the second wall is a vacuum insulation configured for insulation of cryogenic liquefied gas.
  • the unit comprises a fuel conduit extending through the second shell and the third shell and the vacuum insulation to the first tank and that the fuel conduit is enclosed with an insulation.
  • the second tank comprises at least two separate compartments, wherein advantageously a first compartment of the second tank has a volume which is 1 - 5% of the volume of the first tank.
  • the first compartment is configured to store necessary volume of pilot for to enable a gas mode operation of an internal combustion engine.
  • the invention provides considerable space savings when the both the main fuel and the pilot for a dual fuel engine can be stored using a footprint area of one fuel tank only.
  • the second space suitably, it is possible to store for example fresh water and liquefied gas in the same fuel tank unit.
  • This provides considerable space savings when the both the fuel and the second liquid, such as fresh water, can be stored using a footprint area of one fuel tank only.
  • FIG. 1 illustrates, on a deck or a platform 12 of a marine vessel, a fuel tank unit 10 in accordance with a preferred embodiment of the present invention.
  • Figure 2 illustrates the cross sectional view II-II of the figure 1 .
  • the fuel tank unit 10 comprises a first fuel tank 14 for liquefied gas fuel enclosed by a first shell 18.
  • the first fuel tank may be constructed as a pressure vessel depending on the actual application but it is at least arranged to withhold the cryogenic circumstances inside the first tank 14.
  • the first shell 18 is enclosed also by a second shell 20 and there is a space between the first shell and the second shell 20 practically all over the first shell 18.
  • the space is provided with heat insulation 24.
  • the heat insulation 24 is advantageously a vacuum insulation. In the vacuum insulation the space between the first shell 18 and the second shell 20 is practically totally evacuated of air, creating a near-vacuum which significantly reduces heat transfer by conduction or convection through the space.
  • the fuel tank comprises further a second tank 16 for liquid fuel enclosed by a third shell 22.
  • the third shell 22 encloses also the second shell 20.
  • the tank unit is configured to supply fuel to a so called dual fuel engine where the liquefied gas is used as the main fuel and the liquid fuel, such as a marine diesel oil or light fuel oil, is used as pilot fuel for igniting the main fuel in the engine.
  • the first fuel tank 14 is enclosed by the second fuel tank 16.
  • the second fuel tank 16 encloses also the heat insulation 24 arranged between the first and the second fuel tank.
  • the tank unit 10 is of elongated form having a length L, width W, height H and longitudinal axis A lengthwise the unit.
  • the first shell 18 and the second shell 20 have a circular cross section perpendicular to the longitudinal axis A.
  • Both the first and the second shell comprises a cylindrical part and dome-like end parts 18', 20' at the lengthwise ends of the cylindrical part.
  • the third shell 22 I has, perpendicular to the longitudinal axis A, a rectangular cross sectional shape and end parts 22' at its ends.
  • the width W of the tank unit corresponds substantially the width of the first fuel tank 14 and the height H of the tank unit 10 is only slightly higher than the height or the diameter of the first fuel tank 14.
  • two of the walls of the third shell 22 are in contact with the second shell 20.
  • the walls of the third wall are tangential to the second shell.
  • the space between the first shell 18 and the second shell 20 constitutes a heat insulation for the first fuel tank 14.
  • at least two walls of the third shell are arranged only in the vicinity of the second shell i.e. there is a small gap arranged between the shells.
  • FIG 3 there is shown an embodiment of the invention where all of the walls of the third shell are against and tangential to the second shell. This provides the most space-effective solution. Due to the shapes of the third 22 and the second 20 shells the different sections at the corners are in communication with each other at the ends of the tank unit 10.
  • FIG 4 there is shown an embodiment of the invention where two of the walls of the third shell 22 are connected with each other by a rounded fillet complying with the rounded shape of the vessels deck structure 12 or a hull.
  • the third shell 22 is integrated to the vessel's deck and/or hull structure.
  • the vessel's deck and/or hull wall forms the third shell 22.
  • the third shell 22 has, perpendicular to the longitudinal axis, a polygonal cross section.
  • the polygonal third shell 22 is arranged inside an imaginary rectangle the sidewalls of which are tangential to the second shell 20.
  • the third shell 22 encloses only partially the second shell 20.
  • the second fuel tank 16 is arranged on top of the first fuel tank 14.
  • the third shell comprises three side walls which are tangential to the second shell 20.
  • the third shell 22 has one section the width of which is equal to the diameter of the second shell 20 and the other two sections having width which is equal to the radius of the second shell 20.
  • the third shell 22 encloses only partially the second shell 20.
  • the second fuel tank 16 is arranged to the end of the tank unit such that the third shell 22 covers substantially only the dome-like end part 20' of the second shell 20.
  • the third shell 22 is circular having a diameter less than or equal to the diameter of the second shell 20.
  • the heat insulation between the first wall and the second wall is a vacuum insulation configured for insulation of liquefied gas.
  • the space may also be filled with expanded perlite particles.
  • the heat conductivity of the heat insulation is below 0,0023 W mK .
  • the fuel tank unit 10 is provided with a room or space 30 welded to, or by some other appropriate means arranged in connection with, the third shell 20 of the tank unit 10, the space 30 housing the piping, heaters, evaporators and other optional equipment, as well as instruments (now shown) needed when filling or emptying the fuel tank unit 10.
  • the fuel tank unit 10 comprises at least two liquefied gas fuel conduits 32 extending through the second shell 20 and the third shell 22 and the insulation to the first tank 14.
  • the fuel conduit 32 is enclosed with insulation.
  • One of the conduits opens to the bottom part of the tank 14 while the other opens into an upper part i.e. an ullage space of the tank 14 and is provided with spraying nozzles.
  • the fuel tank unit 10 comprises at least one liquid fuel conduit 34 extending through the third shell 22 which conduit opens to the bottom part of the second tank 16.
  • FIG 9 there is shown an embodiment of the invention which is otherwise similar to that shown in the figure 1 except that the second tank 16 for the liquid fuel enclosed by a third shell 22 has at least two separate compartments 16.1, 16.2.
  • the first and the second compartments are both provided with a liquid fuel conduit 34, 35 extending through the third shell 22.
  • a first liquid fuel conduit 34 opens to the bottom part of the first compartment 16.1 of the second tank 16 and a second liquid fuel conduit 35 opens to the bottom part of the second compartment 16.1 of the second tank 16.
  • the first and the second compartments are separated by a fluid tight intermediate wall 17.
  • the tank unit 10 is configured to supply fuel to a so called dual fuel engine where the liquefied gas is used as the main fuel and the liquid fuel, such as a marine diesel oil or light fuel oil, is used as pilot fuel for igniting the main fuel in a combustion chamber of the engine.
  • the first compartment 16.1 is dimensioned to contain the pilot fuel for the engines which consume the liquefied gas as the main fuel.
  • the volume of the first compartment 16.1 of the second tank 16 has a volume which is advantageously 1 - 5% of the volume of the first tank 14 and therefore the volumes correspond substantially the ratio of the consumption of the pilot and the main fuel.
  • the second compartment 16.2 of the second tank 16 may be used for storing liquid fuel for back-up operation when the engine is operated in a so called diesel mode.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Claims (14)

  1. Unité à réservoirs de combustible (10) pour stocker du combustible gazeux liquéfié en tant que premier liquide et un deuxième combustible liquide dans un navire, l'unité (10) comprenant un premier réservoir de combustible (14) pour du combustible gazeux liquéfié et un deuxième réservoir de combustible (16) pour le deuxième combustible liquide, le premier réservoir de combustible (14) est entouré par une première coque (18) et la première coque (18) est entourée par une deuxième coque (20), dans laquelle une isolation thermique sous vide (24) est disposée entre la première coque (18) et la deuxième coque (20), et la deuxième coque (20) est entourée au moins partiellement par une troisième coque (22), dans laquelle le deuxième réservoir de combustible (16) est disposé entre la deuxième coque (20) et la troisième coque (22), dans laquelle l'unité à réservoirs de combustible (10) comprend au moins deux conduits de combustible gazeux liquéfié (32) entourés par l'isolation (24), les conduits (32) s'étendant à travers la deuxième coque (20) et la troisième coque (22) et l'isolation vers le premier réservoir (14), dans laquelle l'un des conduits s'ouvre sur la partie inférieure du premier réservoir de combustible (14) alors que l'autre débouche dans une partie supérieure du premier réservoir (14), et dans laquelle l'unité à réservoirs de combustible (10) comprend au moins un conduit de combustible liquide (34) s'étendant à travers la troisième coque (22), lequel conduit s'ouvre sur la partie inférieure du deuxième réservoir (16),
    caractérisée en ce qu'au moins l'un des conduits s'ouvrant sur la partie supérieure du premier réservoir (14) est doté de buses de pulvérisation.
  2. Unité à réservoirs de combustible (10) selon la revendication 1, caractérisée en ce que le premier réservoir de combustible (14) est configuré pour stocker du combustible gazeux liquéfié et le deuxième réservoir de combustible (16) est configuré pour stocker du combustible liquide, dans laquelle le deuxième réservoir de combustible (16) est disposé entre la deuxième coque (20) et la troisième coque (22).
  3. Unité à réservoirs de combustible (10) selon la revendication 1, caractérisée en ce que la deuxième coque (20) est complètement entourée par la troisième coque (22).
  4. Unité à réservoirs de combustible (10) selon la revendication 1, caractérisée en ce que l'unité à réservoirs de combustible (10) est d'une forme allongée ayant une longueur (L), une largeur (W), une hauteur (H) et un axe longitudinal (A) dans le sens de la longueur de l'unité (10), et que la deuxième coque (20) a, perpendiculairement à l'axe longitudinal, une section transversale circulaire.
  5. Unité à réservoirs de combustible (10) selon la revendication 4, caractérisée en ce que la troisième coque (22) a, perpendiculairement à l'axe longitudinal, une section transversale polygonale.
  6. Unité à réservoirs de combustible (10) selon la revendication 4, caractérisée en ce que la troisième coque (22) a, perpendiculairement à l'axe longitudinal, une section transversale qui est à l'intérieur d'un rectangle, dont les parois latérales sont tangentielles par rapport à la deuxième coque (20).
  7. Unité à réservoirs de combustible (10) selon la revendication 4, caractérisée en ce que la troisième coque (22) a, perpendiculairement à l'axe longitudinal, une forme rectangulaire en section transversale.
  8. Unité à réservoirs de combustible (10) selon la revendication 3, caractérisée en ce qu'au moins une paroi de la troisième coque (22) est contre la deuxième coque (20).
  9. Unité à réservoirs de combustible (10) selon la revendication 3, caractérisée en ce qu'au moins deux parois de la troisième coque (22) sont contre la deuxième coque (20).
  10. Unité à réservoirs de combustible (10) selon la revendication 3, caractérisée en ce que l'ensemble des parois de la troisième coque (22) sont tangentielles par rapport à la deuxième coque (20).
  11. Unité à réservoirs de combustible (10) selon la revendication 3, caractérisée en ce que l'unité à réservoirs de combustible (10) a un axe longitudinal (A) dans le sens de la longueur de l'unité (10) et que les première et deuxième coques (18, 20) ont, perpendiculairement à l'axe longitudinal, une section transversale circulaire.
  12. Unité à réservoirs de combustible (10) selon la revendication 1, caractérisée en ce que l'isolation thermique (24) entre la première paroi et la deuxième paroi est une isolation sous vide (24) configurée pour l'isolation (24) de gaz liquéfié cryogénique.
  13. Unité à réservoirs de combustible (10) selon la revendication 1, caractérisée en ce que le deuxième réservoir (16) comprend au moins deux compartiments séparés (16.1, 16.2).
  14. Unité à réservoirs de combustible (10) selon la revendication 13, caractérisée en ce qu'un premier compartiment (16.1) du deuxième réservoir (16) a un volume qui est de 1-5% du volume du premier réservoir (14).
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FR2460441A1 (fr) * 1979-06-29 1981-01-23 Telecommunications Sa Dispositif cryostatique pouvant supporter des accelerations
JP3669911B2 (ja) * 2000-09-19 2005-07-13 エア・ウォーター株式会社 液化ガス収容装置
US8651313B1 (en) * 2009-09-01 2014-02-18 The Boeing Company Underwater cryogenic storage vessel
KR101210917B1 (ko) * 2010-05-19 2012-12-11 대우조선해양 주식회사 갑판 상부에 연료탱크를 탑재한 부유식 구조물
EP2695858B1 (fr) * 2012-08-09 2015-09-16 Aaqius & Aaqius S.A. Système de stockage et de délivrance d'ammoniac gazeux
JP6134211B2 (ja) * 2013-06-19 2017-05-24 川崎重工業株式会社 二重殻タンクおよび液化ガス運搬船
WO2016087705A1 (fr) 2014-12-05 2016-06-09 Wärtsilä Finland Oy Vaisseau long-courrier ayant des réservoirs pour moteurs à deux combustibles
WO2016097461A1 (fr) 2014-12-16 2016-06-23 Wärtsilä Finland Oy Réservoir de gaz naturel liquéfié
CN205278766U (zh) * 2015-12-01 2016-06-01 朝迪国际有限公司 低温流体汽化器

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WO2018065658A1 (fr) 2018-04-12
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KR20190055126A (ko) 2019-05-22
KR102028871B1 (ko) 2019-11-15
CN109790956B (zh) 2021-04-23
EP3523567A1 (fr) 2019-08-14

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