WO2017042424A1 - Agencement de réservoir de carburant d'un navire - Google Patents

Agencement de réservoir de carburant d'un navire Download PDF

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Publication number
WO2017042424A1
WO2017042424A1 PCT/FI2015/050599 FI2015050599W WO2017042424A1 WO 2017042424 A1 WO2017042424 A1 WO 2017042424A1 FI 2015050599 W FI2015050599 W FI 2015050599W WO 2017042424 A1 WO2017042424 A1 WO 2017042424A1
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WO
WIPO (PCT)
Prior art keywords
manhole
shell
fuel tank
closing
recited
Prior art date
Application number
PCT/FI2015/050599
Other languages
English (en)
Inventor
Emanuele D'URSO
Laura SCARPA
Original Assignee
Wärtsilä 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 Wärtsilä Finland Oy filed Critical Wärtsilä Finland Oy
Priority to PCT/FI2015/050599 priority Critical patent/WO2017042424A1/fr
Publication of WO2017042424A1 publication Critical patent/WO2017042424A1/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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/004—Details of vessels or of the filling or discharging of vessels for large storage 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
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/014—Suspension means
    • 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
    • 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
    • F17C2203/0629—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
    • F17C2205/0153—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
    • F17C2205/0329—Valves manually 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
    • F17C2205/0379—Manholes or access openings for human beings
    • 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
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • 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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/04—Methods for emptying or filling
    • F17C2227/045—Methods for emptying or filling 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
    • 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
    • F17C2250/0417—Level of content in the vessel with electrical means
    • 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
    • F17C2250/0486—Indicating or measuring characterised by the location
    • F17C2250/0491—Parameters measured at or inside 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
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • F17C2260/033—Dealing with losses due to heat transfer by enhancing insulation
    • 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 ves- sel. More particularly, the present invention relates to such an LNG- fuel tank arrangement that the tank comprises an inner shell and an outer shell with manholes arranged in both shells.
  • NG Liquefied Natural Gas
  • CH4 methane
  • propane In normal ambient conditions NG is a gas, but it can be liquefied by cooling it down to -162°C.
  • NG In liquid form the specific volume is reduced significantly, 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 CO2 emissions compared with oil-based fuels. When NG is liquefied, all sulphur is removed, which means zero SOx emis- sions.
  • 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 exhaust gases of ship's engines is a very important feature.
  • LNG is not only an environmentally sound solution, but also economically interesting at today's oil prices.
  • the most feasible way of storing NG in ships is in liquid form.
  • LNG is stored in cylindrical, double- walled, insulated stainless steel tanks.
  • the tank pressure is defined by the requirement of the engines burning the gas and is usually less than 5 bar.
  • a higher (typically 9 bar) tank design pressure is selected due to the natural boil-off phenomenon.
  • EP-B1 -2032428 discloses a fuel system for a gas driven piston engine in a marine vessel.
  • the gaseous fuel is stored in at least one fuel storage tank in the vessel as liquefied gas. Since the liquefied gas is at low temperature the fuel tank s is/are heat insulated.
  • tanks designed and used for storing liquefied natural gas are not suitable for storing or containing any other fuels than gaseous fuels like the liquefied natural gas, but separate tanks for separate fuels are needed.
  • the main reason for not being able to use LNG- tanks for storing liquid fuels has been the use of a double wall construction in the tank. In other words, due to the low liquid temperature of the LNG, the cavity between the walls or shells of the tank has been provided with an insulation, and, additionally, the air has been evacuated from the cavity to form a vacuum therein.
  • the use of the tank for storing both liquid and gaseous fuels requires cleaning of the interior of the tank each time the fuel is about to be changed, and since the traditional LNG- tanks have not been provided with any access into their interior, they cannot be cleaned.
  • WO-A1 -2014097974 discusses a transport container for liquefied gas having a double-wall structure with an inner tank for accommodating liquefied gas of a lower boiling point than air condensation temperature, and an outer tank that encloses the inner tank, an area between the inner and outer tanks being vacuum-insulated.
  • the transport container has a submerged pump for discharging liquefied gas and a manhole for maintenance and inspection of the submerged pump, and the manhole has an inner tank manhole communicating with the inner tank, an outer tank manhole enclosing the outer side of the inner tank manhole and being attached to the outer tank, and a shielding member for separating the area between the inner and outer tanks and outside air and suppressing heat input from the outer tank manhole to the inner tank manhole, the shielding member being placed between an inner tank manhole trunk and an outer tank manhole trunk.
  • the shielding member also allows heat-related contraction and expansion of the inner tank (without any stress to the outer tank) when shifting between ambient temperature to LNG liquid temperature and vice versa.
  • the trunk of the inner tank manhole extends well outside the outer tank via the outer tank manhole opening in the outer tank shell.
  • the trunk of the outer tank manhole extends far outside the outer tank shell so that the inner tank manhole trunk may be brought far enough outside the outer tank shell.
  • the reason why the trunks have been arranged extend side by side or one inside another is that the shielding member is arranged between the trunks of the inner and outer manholes.
  • the shielding member is a flexible stainless steel bellows that maintains the vacuum between the inner and the outer tanks even if both manholes are opened. The bellows needs a considerable distance in the direction parallel with the axis of the trunks, which equals to considerable space requirements outside the shell of the outer tank.
  • an object of the present invention is to design an LNG- fuel tank arrangement in a marine vessel wherein also liquid fuels at ambient temperature may be stored in a fuel tank mainly designed for storing LNG.
  • Another object of the present invention is to present an alternative solution to the problems concerning thermal expansion and contraction of the inner shell of an LNG- fuel tank.
  • a further object of the present invention is to offer a manhole construction by means of which the fuel tank and/or the equipment (like pumps) therein may be inspected, serviced or cleaned whenever needed.
  • a yet further object of the present invention is to offer a manhole construction including means for determining the amount of fuel in the tank, i.e. for determining the level of fuel in the tank.
  • At least one object of the present invention is substantially met by a fuel tank arrangement of a marine vessel comprising a fuel tank being formed of an inner shell, an outer shell, an insulation in a cavity therebetween and a manhole structure for allowing access into the inner shell, the manhole structure compris- ing an inner manhole in the inner shell with means for closing the inner manhole, an outer manhole with means for closing the outer manhole and means for closing the cavity from atmosphere and for allowing thermal contraction and expansion of the inner shell in relation to the outer shell, wherein the means for closing the cavity from atmosphere and for allowing thermal contraction and expansion of the inner shell in relation to the outer shell is a closing element arranged between an outer surface of the inner shell and an inner surface of the outer shell and fastened thereto in an air-tight manner.
  • the above construction of the manhole structure for the fuel tank arrangement offers a safe and reliable means for allowing risk-free ther- mal expansion and contraction of the inner shell in relation to the outer shell.
  • the manhole structure of the present invention allows the storage of different types of fuels in the same fuel tank designed for LNG. Therefore the need for replacing the fuel tank or the need for two different fuel tanks, whenever shift of fuel is required is obviated.
  • the liquid fuel mentioned above may be, for in- stance, marine diesel oil, marine gas oil, light fuel oil, heavy fuel oil, intermediate fuel oil or marine diesel oil.
  • the manhole structure of the invention provides an opportunity to arrange in the fuel tank means for determining the level of fuel in the tank. Such is accomplished by ar- ranging a fuel level detection means in the inner manhole cover and take the information outside the tank by means of a wiring running via a bushing arranged in an opening in the outer manhole cover.
  • Figure 1 illustrates a longitudinal cross section of the fuel tank in accordance with a preferred embodiment of the present invention
  • Figure 2 illustrates in an enlarged scale a transverse cross-section of a manhole construction of the fuel tank in accordance with a first preferred embodiment of the present invention
  • Figure 3 illustrates the cross-section of the manhole construction of Fig. 2 as an exploded view
  • Figure 4 illustrates a cross-section of the manhole construction of Fig. 2 in a plane along the axis of the fuel tank
  • Figure 5 illustrates a longitudinal cross section of the fuel tank in accordance with a second preferred embodiment of the present invention
  • Figure 6 illustrates a longitudinal cross section of the fuel tank in accordance with a third preferred embodiment of the present invention.
  • Figure 7 illustrates a longitudinal cross section of the fuel tank in accordance with a fourth preferred embodiment of the present invention.
  • FIG 1 illustrates, on a deck 12 of a marine vessel, an LNG- fuel tank 10 in accordance with a preferred embodiment of the present invention.
  • the LNG- fuel tank 10 is supported by means of saddles 14 on the deck 12.
  • the LNG- fuel tank 10 comprises an inner shell 16 of stainless steel, an outer shell 18 and a cavity 20 therebetween with an insulation 22 therein.
  • the inner shell 16 is supported on or to the outer shell 18 by means of supports 24 arranged, naturally, in the cavity 20.
  • the LNG- fuel tank 10 is normally provided with a room or space 26 welded to, or by some other appropriate means arranged in connection with, the outer shell 18 of the tank, the space 26 housing the piping and instruments (now shown) needed when filling or emptying the fuel tank 10.
  • the LNG- fuel tank 10 is also provided with a manhole construction 28 via which the access into the interior of the LNG- fuel tank 10 is made possible.
  • the cavity 20 between the inner and outer shells 16 and 18 is filled with heat insulation material and, additionally, air is evacuated from the cavity 20.
  • a closing element is arranged in a gas-tight manner between the inner and the outer shells 16 and 18, the closing element maintaining the vacuum in the cavity 20 even if the manholes are opened.
  • Figures 2, 3 and 4 illustrate the manhole construction 28 of Figure 1 in more detail.
  • the manholes 30 and 50 of both shells 16 and 18, respectively, of the LNG- fuel tank are closed, whereas Fig. 3 illustrates the man- hole construction in exploded view, i.e. all parts thereof separated.
  • Fig. 4 illustrates the manhole construction as a cross section taken along the axis of the fuel tank.
  • the inner shell 16 has an inner manhole 30 with a collar 32, a flange 34, a gasket 36 and an inner manhole cover 38. All the listed components of the manhole fit within the outer tank shell 18, i.e. in the cavity between the inner and outer tank shells.
  • the collar 32 is fastened, preferably welded, round the manhole opening in the inner shell 16.
  • the end of the collar 32 opposite the inner shell 16 is provided with a flange 34.
  • the outer shell 16 has an outer manhole 50 with a collar 52, a flange 54, a gasket 56 and an outer manhole cover 58.
  • the collar 52 is fastened, preferably welded, round the manhole opening in the outer shell 18.
  • the end of the collar 52 opposite the outer shell 18 is provided with a flange 54.
  • the manhole cover 58 is tightened against the flange 54 by appropriate tightening means like a series of bolts arranged round the outer manhole cover 58 and the flange 54, or a V-band clamp 60, or a hinge and a tightenable closing means like a bolt.
  • the figures also show a valved duct 62 provided in the outer manhole cover 58 and a Vacuum Gauge VG. These are used when the pressure conditions in the cavity 64 between the inner and outer manhole covers 38 and 58 is changed.
  • a vacuum pump is connected to the duct 62 and operated until a desired level of vacuum is shown on the Vacuum Gauge VG, whereafter the valve in the duct 62 is closed.
  • the valve in the duct 62 is first opened and the cavity 64 is allowed to fill with ambient air or some other appropriate gas via duct 62.
  • the dimensions of the inner and outer manholes are such that the size of the manhole opening of the outer manhole 50 is larger than the size of the inner manhole cover 38. In other words, as the manholes are most often round, the diameter of the outer manhole opening is larger than the diameter of the inner manhole cover 38.
  • FIGs 2, 3 and 4 show also the closing element 66 in accordance with a first preferred embodiment of the present invention arranged between the inner shell 16 and the outer shell 18 just outside the manhole openings in the shells 16 and 18.
  • the closing element 66 forms an air-tight barrier between the cavity 20 between the shells 16 and 18 of the LNG- fuel tank and the cavity 64 between the inner and outer manhole covers 38 and 58 of the inner and outer manholes 30 and 50.
  • the closing element 66 is welded, or attached in some other appro- priate manner, on both the inner shell 16 and the outer shell 18 in an airtight manner. In other words, the closing element 66 is attached to the outer surface 16' of the inner shell 16 and to the inner surface 18' of the outer shell 18.
  • the closing element 66 is, in this embodiment, formed of three sections, i.e. a first adapter section 66' fastened to the inner surface 18' of the outer shell 18, a second adapter section 66" fastened to the outer surface 16' of the inner shell 16, and a planar section 66"' between the first and the second adapter sections 66' and 66".
  • the definition "planar” above has to be understood broadly as already the function of the 'planar section', while the temperature of the inner shell varies, makes the planar section bend into a blunt (truncated) con- ical shape, whereby the cone angle (angle formed at the tip of the cone) is not exactly 180°, but deviates slightly therefrom.
  • first and the second adapter sections 66' and 66" are preferably formed into either a generally cylindrical or conical, just to name two most preferred options, elements, though also the shape of a spherical segment or other more or less curved shapes may come into question.
  • first adapter section 66' is shown as a conical element and the second adapter section 66" as a cylindrical element, though the shapes thereof may be opposite or both may be either conical or cylindrical.
  • the first adapter section 66' has its rim opposite to the planar section 66"' adapted to match to the curvature of the inner surface 18' of the outer shell 18.
  • the second adapter section 66" has its rim opposite to the planar section 66"' adapted to match to the curvature of the outer surface 16' of the inner shell 16.
  • the planar section 66"' of the closing element 66 is designed to absorb the thermal expansion and contraction of the inner shell 16 without subjecting any significant forces to the outer shell 18.
  • the closing element 66 is, preferably, a sheet metal element of stainless steel assembled on one or more parts and having a thickness less than that of the shells 16 and 18.
  • the closing element of a second preferred embodiment of the present invention illustrated in Figure 5 differs from that of the first preferred embodiment in that the planar section 66"' of the closing element is, in the second preferred embodiment of the present invention, fastened at its rim opposite to the first adapter section 66' to the collar 32 of the inner manhole 30.
  • the collar 32 forms the second adapter section 66".
  • the closing element of a third preferred embodiment of the present invention illustrated in Figure 6 differs from that of the first preferred embodiment in that the planar section 66"' of the closing element is, in the third preferred embodiment of the present invention, fastened at its outer rim to the collar 52 of the outer manhole 50, whereby, naturally, the collar 52 is extended inside the outer tank shell 18 near the outer surface of the inner tank shell 16.
  • the radially inward (in relation to the fuel tank) extension of the collar 52 forms the first adapter section 66'.
  • the closing element of a fourth preferred embodiment of the present invention illustrated in Figure 7 is a combination of the second and third embodi- ments so that the planar section 66"' of the closing element is, in the fourth preferred embodiment of the present invention, fastened at its inner rim to the collar 32 of the inner manhole 30 and at its outer rim to the radially inward (in relation to the fuel tank) extension of the collar 52 of the outer manhole 50.
  • Figures 2 and 3 show as an additional embodiment of the present invention means 70, attached to the inner manhole cover 38 of the inner manhole 30, for determining the fuel level in the tank, or rather within the inner shell 16.
  • the illustrated fuel level determining means 70 is a radar- based detec- tor connected by means of wiring 72 to the outside of the tank via a bushing 74 arranged in an opening in the outer manhole cover 58 of the outer shell 18.

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

Abstract

La présente invention concerne un agencement de réservoir de carburant d'un navire comprenant un réservoir de carburant (10) constitué d'une enveloppe interne (16), d'une enveloppe externe (18), d'une isolation (22) dans une cavité (20) entre celles-ci et d'une structure de trou d'homme (28) pour permettre l'accès dans l'enveloppe interne (16), la structure de trou d'homme (28) comprenant un trou d'homme interne (30) dans l'enveloppe interne (16) avec des moyens (32, 34, 36, 38, 40) pour fermer le trou d'homme interne (30), un trou d'homme externe (50) avec des moyens (52, 54, 56, 8, 60) pour fermer le trou d'homme externe (50) et des moyens pour fermer la cavité (20) et pour permettre la contraction et la dilatation thermique de l'enveloppe interne (16) par rapport à l'enveloppe externe (18). Les moyens pour fermer la cavité (20) et pour permettre la contraction et la dilatation thermique de la coque interne (16) par rapport à la coque externe (18) sont un élément de fermeture (66) agencé entre une surface externe (16') de l'enveloppe interne (16) et une surface interne (18') de l'enveloppe externe (18) et fixé à celles-ci d'une manière étanche à l'air.
PCT/FI2015/050599 2015-09-11 2015-09-11 Agencement de réservoir de carburant d'un navire WO2017042424A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/FI2015/050599 WO2017042424A1 (fr) 2015-09-11 2015-09-11 Agencement de réservoir de carburant d'un navire

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PCT/FI2015/050599 WO2017042424A1 (fr) 2015-09-11 2015-09-11 Agencement de réservoir de carburant d'un navire

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020094221A1 (fr) 2018-11-07 2020-05-14 Wärtsilä Finland Oy Réservoir de combustible cryogénique
WO2020207594A1 (fr) 2019-04-12 2020-10-15 Wärtsilä Finland Oy Procédé de surveillance de gaz liquéfié dans un réservoir cryogénique de gaz liquéfié et réservoir cryogénique
FR3109978A1 (fr) * 2020-05-11 2021-11-12 Gaztransport Et Technigaz Dôme liquide d’une cuve de stockage pour gaz liquéfié comportant une ouverture munie d’une trappe additionnelle
WO2023274559A1 (fr) 2021-07-02 2023-01-05 Wärtsilä Finland Oy Agencement et procédé dans un système d'alimentation en carburant hydrogène liquide
WO2024141693A1 (fr) * 2022-12-30 2024-07-04 Wärtsilä Finland Oy Navire, procédé et réservoir de carburant

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US2550886A (en) * 1947-02-12 1951-05-01 Union Carbide & Carbon Corp System for conserving liquefied gases
JPS6119592U (ja) * 1984-07-09 1986-02-04 石川島播磨重工業株式会社 二重殻タンクのマンホ−ル構造
EP2289729A1 (fr) * 2009-09-01 2011-03-02 Hillriver Ltd. Dispositif de détection de niveau de carburant
EP2032428B1 (fr) 2006-06-27 2013-05-29 Wärtsilä Finland Oy Circuit d'alimentation pour vaisseau propulsé au gaz
WO2014097974A1 (fr) 2012-12-19 2014-06-26 川崎重工業株式会社 Conteneur de transport pour gaz liquéfié
WO2014203471A1 (fr) * 2013-06-19 2014-12-24 川崎重工業株式会社 Citerne à double paroi et cuve de transport de gaz liquéfié
WO2014203470A1 (fr) * 2013-06-19 2014-12-24 川崎重工業株式会社 Réservoir à double enveloppe et bateau de transport de gaz liquéfié

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2550886A (en) * 1947-02-12 1951-05-01 Union Carbide & Carbon Corp System for conserving liquefied gases
JPS6119592U (ja) * 1984-07-09 1986-02-04 石川島播磨重工業株式会社 二重殻タンクのマンホ−ル構造
EP2032428B1 (fr) 2006-06-27 2013-05-29 Wärtsilä Finland Oy Circuit d'alimentation pour vaisseau propulsé au gaz
EP2289729A1 (fr) * 2009-09-01 2011-03-02 Hillriver Ltd. Dispositif de détection de niveau de carburant
WO2014097974A1 (fr) 2012-12-19 2014-06-26 川崎重工業株式会社 Conteneur de transport pour gaz liquéfié
WO2014203471A1 (fr) * 2013-06-19 2014-12-24 川崎重工業株式会社 Citerne à double paroi et cuve de transport de gaz liquéfié
WO2014203470A1 (fr) * 2013-06-19 2014-12-24 川崎重工業株式会社 Réservoir à double enveloppe et bateau de transport de gaz liquéfié

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020094221A1 (fr) 2018-11-07 2020-05-14 Wärtsilä Finland Oy Réservoir de combustible cryogénique
WO2020207594A1 (fr) 2019-04-12 2020-10-15 Wärtsilä Finland Oy Procédé de surveillance de gaz liquéfié dans un réservoir cryogénique de gaz liquéfié et réservoir cryogénique
FR3109978A1 (fr) * 2020-05-11 2021-11-12 Gaztransport Et Technigaz Dôme liquide d’une cuve de stockage pour gaz liquéfié comportant une ouverture munie d’une trappe additionnelle
WO2021228751A1 (fr) * 2020-05-11 2021-11-18 Gaztransport Et Technigaz Dôme liquide d'une cuve de stockage pour gaz liquéfié comportant une ouverture munie d'une trappe additionnelle
WO2023274559A1 (fr) 2021-07-02 2023-01-05 Wärtsilä Finland Oy Agencement et procédé dans un système d'alimentation en carburant hydrogène liquide
WO2024141693A1 (fr) * 2022-12-30 2024-07-04 Wärtsilä Finland Oy Navire, procédé et réservoir de carburant

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