NO325215B1 - Device by vessel equipped with a liquid natural gas evaporator - Google Patents

Device by vessel equipped with a liquid natural gas evaporator Download PDF

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Publication number
NO325215B1
NO325215B1 NO20061205A NO20061205A NO325215B1 NO 325215 B1 NO325215 B1 NO 325215B1 NO 20061205 A NO20061205 A NO 20061205A NO 20061205 A NO20061205 A NO 20061205A NO 325215 B1 NO325215 B1 NO 325215B1
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Norway
Prior art keywords
vessel
natural gas
pipe
gas
land
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Application number
NO20061205A
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Norwegian (no)
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NO20061205L (en
Inventor
Svein Borge Hellesmark
Per Gunnar Andersen
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Torp Tech As
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Priority to NO20061205A priority Critical patent/NO325215B1/en
Priority to PCT/NO2007/000096 priority patent/WO2007105957A1/en
Publication of NO20061205L publication Critical patent/NO20061205L/en
Publication of NO325215B1 publication Critical patent/NO325215B1/en

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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
    • F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
    • F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B22/00—Buoys
    • B63B22/02—Buoys specially adapted for mooring a vessel
    • B63B22/021—Buoys specially adapted for mooring a vessel and for transferring fluids, e.g. liquids
    • 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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure
    • F17C9/02—Methods or apparatus for discharging liquefied or solidified gases from vessels not under pressure with change of state, e.g. vaporisation
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0107—Single phase
    • F17C2225/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/03—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the pressure level
    • F17C2225/035—High pressure, i.e. between 10 and 80 bars
    • 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
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0135—Pumps
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0302—Heat exchange with the fluid by heating
    • F17C2227/0309—Heat exchange with the fluid by heating using another fluid
    • F17C2227/0316—Water heating
    • F17C2227/0318—Water heating using seawater
    • 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
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0388—Localisation of heat exchange separate
    • F17C2227/0395—Localisation of heat exchange separate using a submerged heat exchanger
    • 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
    • F17C2265/05—Regasification
    • 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
    • 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
    • F17C2270/011—Barges
    • F17C2270/0113—Barges floating

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

Abstract

Anordning ved fartøy som er forsynt med en fordamper (30) for flytende naturgass (LNG) og nødvendige rørelement (22,28) for transport av flytende naturgass frem til fordamperen (30), samt nødvendige rørelement (32) for transport av den fordampede gass fra fordamperen (30) og frem til et rør (16a) for videretransport, og hvor fartøyets fordamper (30) for flytende naturgass er koplet til minst ett rørelement (16b 20b, 32b) som forløper fra. et varmeanlegg på land, idet rørelementet (16b, 20b, 32b) er innrettet til å kunne transportere et fluid inneholdende varme til fordamping av den flytende naturgass.Device for vessels equipped with a liquefied natural gas (LNG) evaporator (30) and necessary pipe elements (22,28) for transporting liquefied natural gas to the evaporator (30), and necessary pipe elements (32) for transporting the evaporated gas from the evaporator (30) to a pipe (16a) for further transport, and wherein the vessel's liquid natural gas evaporator (30) is connected to at least one pipe element (16b 20b, 32b) extending from it. an onshore heating system, the pipe element (16b, 20b, 32b) being arranged to be able to transport a fluid containing heat to evaporate the liquid natural gas.

Description

ANORDNING VED FARTØY SOM ER FORSYNT MED EN FORDAMPER FOR FLYTENDE NATURGASS DEVICE FOR VESSELS EQUIPPED WITH A LIQUEFIED NATURAL GAS EVAPORATOR

Denne oppfinnelse vedrører et fartøy som er anbrakt på en avstand fra land og som er forsynt med en fordamper for flytende naturgass. Nærmere bestemt dreier det seg om et fartøy som er forsynt med en fordamper for flytende naturgass (LNG) og nødvendige rørelement for transport av flytende naturgass frem til fordamperen, samt nødvendige rørelement for transport av den fordampede gass fra fordamperen og frem til et rør for videretransport. Fartøyets fordamper for flytende naturgass er koplet til minst ett rørelement som forløper fra et varmeanlegg på land, idet rørelementet er innrettet til å kunne transportere et fluid inneholdende varme til fordamping av den flytende naturgass. This invention relates to a vessel which is placed at a distance from land and which is provided with an evaporator for liquefied natural gas. More specifically, it concerns a vessel that is equipped with a vaporizer for liquefied natural gas (LNG) and the necessary pipe elements for transporting liquid natural gas to the vaporizer, as well as the necessary pipe elements for transporting the vaporized gas from the vaporizer to a pipe for onward transport . The vessel's vaporizer for liquefied natural gas is connected to at least one pipe element that runs from a heating system on land, the pipe element being designed to be able to transport a fluid containing heat for vaporizing the liquefied natural gas.

Flytendegjort naturgass, såkalt LNG (Liquified Natural Gas) fraktes som kjent i nedkjølt tilstand over store avstander i skip som er bygget for slik transport. Ved mottaksstedet er det vanlig å pumpe den flytende gass fra skipet og over på lagertanker av betydelig størrelse, hvoretter gassen fordam-pes før den strømmer inn i et fordelingsnett. As is known, liquefied natural gas, so-called LNG (Liquefied Natural Gas), is transported in a cooled state over long distances in ships built for such transport. At the receiving point, it is usual to pump the liquid gas from the ship into storage tanks of considerable size, after which the gas is evaporated before it flows into a distribution network.

Fordamping av naturgass fra sin sterkt nedkjølte, flytende form og over til gassform betinger en betydelig tilførsel av varme til gassen. Evaporation of natural gas from its highly cooled, liquid form to gaseous form requires a significant supply of heat to the gas.

Mottaksanlegg for flytende naturgass er således relativt store i omfang, samtidig som kostnaden ved bygging og drift av slike anlegg er betydelig. Reception facilities for liquefied natural gas are thus relatively large in scope, while the cost of building and operating such facilities is considerable.

I områder hvor det ikke er anordnet mottaksanlegg av denne art kan et skip sin gasslast ikke losses umiddelbart, men i den takt gassen forbrukes. In areas where there are no receiving facilities of this kind, a ship's gas cargo cannot be unloaded immediately, but as the gas is consumed.

Det er kjent å anvende transportskipet som lager for gasslas-ten mens den pumpes inn i gassmottaket. US patent 6089022 om-handler således et skip for transport av flytende naturgass som er forsynt med fordampere for gassen. Fordamperne varmes med sjøvann. Skipet er innrettet til å kunne levere fordampet naturgass til et anlegg på land etter hvert som gass forbrukes . It is known to use the transport ship as storage for the gas cargo while it is pumped into the gas reception. US patent 6089022 thus deals with a ship for the transport of liquefied natural gas which is equipped with vaporizers for the gas. The evaporators are heated with seawater. The ship is designed to be able to deliver vaporized natural gas to a facility on land as gas is consumed.

Med de relativt store varmemengder det her er tale om kan miljøet omkring fartøyet i utilbørlig grad påvirkes av det nedkjølte sjøvann som slippes ut. With the relatively large amounts of heat we are talking about here, the environment around the vessel can be unduly affected by the cooled seawater that is released.

Oppfinnelsen har til formål å avhjelpe eller redusere i det minste én av ulempene ved kjent teknikk. The purpose of the invention is to remedy or reduce at least one of the disadvantages of known technology.

Formålet oppnås i henhold til oppfinnelsen ved de trekk som er angitt i nedenstående beskrivelse og i de etterfølgende patentkrav. The purpose is achieved according to the invention by the features indicated in the description below and in the subsequent patent claims.

Et fartøy i overensstemmelse med oppfinnelsen er anbrakt på en avstand fra land og er forsynt med en fordamper for flytende naturgass (LNG) og nødvendige rørelement for transport av flytende naturgass frem til fordamperen, samt nødvendige rørelement for transport av den fordampede gass fra fordamperen og frem til et rør for videretransport. Oppfinnelsen kjennetegnes ved at fartøyets fordamper for flytende naturgass er koplet til minst ett rørelement som forløper til et varmeanlegg på land, idet rørelementet er innrettet til å kunne transportere et fluid inneholdende varme til fordamping A vessel in accordance with the invention is placed at a distance from land and is equipped with an evaporator for liquefied natural gas (LNG) and the necessary pipe elements for transporting liquid natural gas to the evaporator, as well as the necessary pipe elements for transporting the vaporized gas from the evaporator onwards to a pipe for onward transport. The invention is characterized by the fact that the vessel's vaporizer for liquefied natural gas is connected to at least one pipe element that leads to a heating system on land, the pipe element being designed to be able to transport a fluid containing heat for evaporation

av den flytende naturgass. of the liquid natural gas.

De ulike rør og kabler som forløper mellom fartøyet og land kan utgjøres av enkle rør og kabler, eller de kan være helt eller delvis samlet i en navlestreng (umbilical). The various pipes and cables that run between the vessel and land can be made up of simple pipes and cables, or they can be completely or partially gathered in an umbilical cord.

Fartøyet kan utgjøres av et lasteskip, i hovedsak slik som det er beskrevet i US 6089022, men tilkoplet en rørledning fra land hvor varmeholdig fluid kan strømme. The vessel can consist of a cargo ship, essentially as described in US 6089022, but connected to a pipeline from land where heat-containing fluid can flow.

Fartøyet kan videre utgjøres av en flytende, fortrinnsvis friseilende, koplingsenhet som er forbundet til et mottak for gass via en rør- eller slangeforbindelse. Koplingsenheten er med fordel forsynt med et fremdriftsmaskineri. Koplingsenheten er innrettet til å kunne kople seg til et lastefartøy. Koplingsenheten kopler seg, på i og for seg kjent måte, til lastefartøyet, fortrinnsvis ved lastefartøyets lastmanifold, for eksempel ved hjelp av trosser, oppdrift, sugekopper, mag-neter eller lignende. Dette utførelseseksemplet er forklart mer utførlig nedenfor. The vessel can also consist of a floating, preferably free-floating, coupling unit which is connected to a gas receptacle via a pipe or hose connection. The coupling unit is advantageously provided with a propulsion mechanism. The coupling unit is designed to be able to connect to a cargo vessel. The coupling unit connects, in a manner known per se, to the cargo vessel, preferably at the cargo vessel's cargo manifold, for example by means of ropes, buoyancy, suction cups, magnets or the like. This embodiment is explained in more detail below.

Fartøyet kan videre utgjøres av en flytende installasjon som ikke er fortøyningsmessig koplet til et lasteskip. En slik installasjon kan for eksempel være en lekterlignende eller halvt nedsenkbar anordning. The vessel can also consist of a floating installation that is not connected to a cargo ship in terms of mooring. Such an installation can, for example, be a barge-like or semi-submersible device.

I en foretrukket utførelsesform sirkuleres fluidet som inne-holder varme til fordampingen, ved hjelp av sirkulasjonspum-per ut til fartøyet og tilbake til land. Sirkulasjonspumpene kan med fordel befinne seg på land, men de kan også være anordnet på fartøyet eller i mellomliggende posisjoner. In a preferred embodiment, the fluid that contains heat for evaporation is circulated using circulation pumps out to the vessel and back to shore. The circulation pumps can advantageously be located on land, but they can also be arranged on the vessel or in intermediate positions.

Fartøyet kan være forsynt med nødvendige sjøvannspumper for sirkulasjon av sjøvann gjennom varmevekslerne i den hensikt å kunne opprettholde i det minste noe leveranse av fordampet gass selv om tilførselen av varmeholdig fluid fra land skulle falle bort. The vessel may be provided with the necessary seawater pumps for the circulation of seawater through the heat exchangers in order to be able to maintain at least some supply of vaporized gas even if the supply of heat-containing fluid from land were to fail.

Anordningen ifølge oppfinnelsen tilveiebringer en løsning for å unngå uheldig miljøpåvirkning nær fordampingsstedet. Samtidig kan det i noen tilfeller, for eksempel når det dreier seg om gassleveranse til et kraftverk på land, tas hånd om bety-delige mengder spillvarme som ellers ville kunne ha en uheldig miljømessig virkning nær kraftverket. The device according to the invention provides a solution to avoid adverse environmental impact near the evaporation site. At the same time, in some cases, for example when it concerns gas delivery to a power plant on land, significant amounts of waste heat can be taken care of which would otherwise have an adverse environmental effect near the power plant.

I det etterfølgende beskrives et ikke-begrensende eksempel på en foretrukket utførelsesform som er anskueliggjort på med-følgende tegninger, hvor: Fig. 1 viser en koplingsenhet som er koplet til et skip hvor skipet er fortøyd til en til havbunnen forankret bøye ; Fig. 2 viser i større målestokk et riss av koplingsenheten i sin virksomme stilling sett i skipets lengderetning; Fig. 3 viser i samme målestokk et sideriss av koplingsenhet en; og Fig. 4 viser med unntak av skipet det samme som i fig. 2, In the following, a non-limiting example of a preferred embodiment is described which is illustrated in the accompanying drawings, where: Fig. 1 shows a coupling unit which is coupled to a ship where the ship is moored to a buoy anchored to the seabed; Fig. 2 shows on a larger scale a view of the coupling unit in its active position seen in the longitudinal direction of the ship; Fig. 3 shows, on the same scale, a side view of coupling unit one; and Fig. 4 shows, with the exception of the ship, the same as in fig. 2,

men her befinner koplingsenheten seg i en høyere stilling i sjøen. but here the coupling unit is in a higher position in the sea.

På tegningene betegner henvisningstallet 1 en koplingsenhet omfattende et skrog 2 og et fremdriftsmaskineri 4. Koplingsenheten 1 er forsynt med tilkoplingselement 6 ifølge i og for seg kjent teknikk for å kunne fortøyes til et lastefartøy 8. In the drawings, the reference number 1 denotes a coupling unit comprising a hull 2 and a propulsion machinery 4. The coupling unit 1 is provided with a connection element 6 according to per se known technology in order to be moored to a cargo vessel 8.

En trosse 10 forbinder skipet til en på havbunnen 12 forankret bøye 14. En fleksibel rørforbindelse 16 forløper fra koplingsenheten 1 gjennom sjøen 18 og ned til en på havbunnen 12 anbrakt rørledning 20 som er koplet til et ikke vist gassmottak på land. Rørforbindelsene 16 og 20 omfatter foruten transportledninger 16a, 20a for fordampet gass i det minste rørelement 16b og 20b for fluid inneholdende fordampingsvarme til den flytende naturgass. I dette utførelseseksempel omfatter rørforbindelsene 16 og 20 også returrørelement 16c og 20c for retur av fluidet til land, samt energi- og styrekabler 16d, 20d. A cable 10 connects the ship to a buoy 14 anchored on the seabed 12. A flexible pipe connection 16 runs from the connection unit 1 through the sea 18 and down to a pipeline 20 placed on the seabed 12 which is connected to a gas reception on land not shown. The pipe connections 16 and 20 include, in addition to transport lines 16a, 20a for vaporized gas, at least pipe elements 16b and 20b for fluid containing vaporization heat for the liquid natural gas. In this design example, the pipe connections 16 and 20 also include return pipe elements 16c and 20c for returning the fluid to land, as well as energy and control cables 16d, 20d.

Under losseoperasjonen opprettholder fremdriftmaskineriet 4 et strekk i trossen 10, hvorved lastefartøyet 8 holdes på betryggende avstand fra bøyen 14. Det er således ikke nødven-dig å anvende en separat taubåt for posisjoneringsformål under losseoperasjonen. During the unloading operation, the propulsion machinery 4 maintains a tension in the cable 10, whereby the cargo vessel 8 is kept at a safe distance from the buoy 14. It is thus not necessary to use a separate tugboat for positioning purposes during the unloading operation.

En rørforbindelse 22, se fig. 2, er ved sitt ene endeparti koplet til lastefartøyets 8 ikke viste lastmanifold og er ved sitt motstående endeparti tilkoplet koplingsenhetens 1 mot-taksrør 24, se fig. 3. Mottaksrøret 24 leder den innstrøm-mende, flytende gass frem til fire gasspumper 26 som er innrettet til å kunne øke trykket i den innstrømmende, flytende gass til et for den etterfølgende fordamping og leveranse hensiktsmessig trykk. A pipe connection 22, see fig. 2, is connected at one end part to the cargo vessel's 8 not shown cargo manifold and is connected at its opposite end part to the receiving pipe 24 of the coupling unit 1, see fig. 3. The receiving pipe 24 leads the inflowing, liquefied gas to four gas pumps 26 which are arranged to be able to increase the pressure in the inflowing, liquefied gas to a suitable pressure for the subsequent evaporation and delivery.

Fra gasspumpene 26 strømmer den flytende gass via gasstrykk-rør 28 frem til fire dykkede fordampere 30. I fordamperne 30 tilføres den flytende gass tilstrekkelig varme fra fluidet, som tilføres via rørforbindelsene 16b samt 32b i et samlerør 32, til at den kan gå over i gassform ved det rådende trykk. From the gas pumps 26, the liquefied gas flows via gas pressure pipes 28 to four submerged evaporators 30. In the evaporators 30, the liquefied gas is supplied with sufficient heat from the fluid, which is supplied via pipe connections 16b and 32b in a collecting pipe 32, so that it can pass into gaseous form at the prevailing pressure.

Etter at fordampingen har funnet sted, strømmer gassen via en transportledning 32a i samlerøret 32 og transportledninger 16a, henholdsvis 20a, i den fleksible rørforbindelse 16 og rørledningen 2 0 frem til det ikke viste gassmottak på land. After the evaporation has taken place, the gas flows via a transport line 32a in the collection pipe 32 and transport lines 16a, respectively 20a, in the flexible pipe connection 16 and the pipeline 20 until the gas reception on land was not shown.

Fluider som fordamperne 30 mottar fordampingsvarme fra sirkuleres ved hjelp av en ikke vist sirkulasjonspumpe på land via Fluids from which the evaporators 30 receive evaporation heat are circulated by means of a circulation pump (not shown) on land via

rørelementene 16b, 16c, 20b, 20c, 32b og 32c. the pipe elements 16b, 16c, 20b, 20c, 32b and 32c.

Det er videre anordnet et hjelpesystem for tilførsel av varme fra sjøvann. Dersom dette skulle bli nødvendig å igangsette pumpes sjøvann ved hjelp av i sin virksomme stilling dykkede sjøvannspumper 36 via innløpsfiltere 38 og sjøvannsrør 40 gjennom fordamperne 30 og korresponderende utløpsrør 42 tilbake til sjøen 18. An auxiliary system has also been arranged for the supply of heat from seawater. If this should become necessary, seawater is pumped using submersible seawater pumps 36 in their active position via inlet filters 38 and seawater pipes 40 through the evaporators 30 and corresponding outlet pipes 42 back to the sea 18.

Claims (10)

1. Anordning ved fartøy som er anbrakt på en avstand fra land og som er forsynt med en fordamper (30) for flytende naturgass (LNG) og nødvendige rørelement (22, 28) for transport av flytende naturgass frem til fordamperen (30), samt nødvendige rørelement (32a) for transport av den fordampede gass fra fordamperen (30) og frem til et rør (16a) for videretransport, karakterisert ved at fartøyets fordamper (30) for flytende naturgass er koplet til minst ett rørelement (16b, 20b, 32b) som forløper fra et varmeanlegg på land, idet rørelemen-tet (16b, 20b, 32b) er innrettet til å kunne transportere et fluid inneholdende varme til fordamping av den flytende naturgass.1. Device for vessels that are placed at a distance from land and that are equipped with a vaporizer (30) for liquefied natural gas (LNG) and necessary pipe elements (22, 28) for transporting liquid natural gas up to the vaporizer (30), as well as necessary pipe element (32a) for transporting the evaporated gas from the evaporator (30) to a pipe (16a) for further transport, characterized in that the vessel's evaporator (30) for liquid natural gas is connected to at least one pipe element (16b, 20b, 32b ) which runs from a heating system on land, as the stirring element (16b, 20b, 32b) is designed to be able to transport a fluid containing heat to vaporize the liquid natural gas. 2. Anordning i henhold krav 1, karakterisert ved at fartøyet utgjøres av et lastefartøy (8).2. Device according to claim 1, characterized in that the vessel consists of a cargo vessel (8). 3. Anordning i henhold krav 1, karakterisert ved at fartøyet utgjøres av en koplingsenhet (1) som er innrettet til å kunne kople seg til et lastefartøy (8) .3. Device according to claim 1, characterized in that the vessel consists of a coupling unit (1) which is arranged to be able to connect to a cargo vessel (8). 4. Anordning i henhold krav 3, karakterisert ved at koplingsenheten (1) er forsynt med fremdriftsmaskineri (4).4. Device according to claim 3, characterized in that the coupling unit (1) is provided with propulsion machinery (4). 5. Anordning i henhold krav 1, karakterisert ved at fartøyet utgjøres av en flytende installasjon som fortøyningsmessig er utilkoplet til et lastefartøy (8) .5. Device according to claim 1, characterized in that the vessel is made up of a floating installation which, in terms of mooring, is not connected to a cargo vessel (8) . 6. Anordning i henhold til krav 1, karakterisert ved at rørelementene (16b, 16c) samt ytter-ligere rørelement (20b, 20c, 32b og 32c) er innrettet til å kunne sirkulere fluid inneholdende varme til fordamping av flytende naturgass.6. Device according to claim 1, characterized in that the pipe elements (16b, 16c) as well as further pipe elements (20b, 20c, 32b and 32c) are arranged to be able to circulate fluid containing heat for vaporization of liquid natural gas. 7. Anordning i henhold krav 1, karakterisert ved at energi- og styrekabler 16d, 20d forløper mellom fartøyet og land.7. Device according to claim 1, characterized in that energy and control cables 16d, 20d run between the vessel and land. 8. Anordning i henhold krav 6, karakterisert ved at en sirkulasjonspumpe er tilkoplet rørelemen-tene (16b, 16c, 20b, 20c, 32b, 32c).8. Device according to claim 6, characterized in that a circulation pump is connected to the stirring elements (16b, 16c, 20b, 20c, 32b, 32c). 9. Anordning i henhold krav 8, karakterisert ved at sirkulasjonspumpen befinner seg på land.9. Device according to claim 8, characterized in that the circulation pump is located on land. 10. Anordning i henhold krav 8, karakterisert ved at sirkulasjonspumpen befinner seg om bord på fartøyet.10. Device according to claim 8, characterized in that the circulation pump is located on board the vessel.
NO20061205A 2006-03-15 2006-03-15 Device by vessel equipped with a liquid natural gas evaporator NO325215B1 (en)

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NO20061205A NO325215B1 (en) 2006-03-15 2006-03-15 Device by vessel equipped with a liquid natural gas evaporator
PCT/NO2007/000096 WO2007105957A1 (en) 2006-03-15 2007-03-12 A device for a vessel provided with an evaporator for liquefied natural gas

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LU37293A1 (en) * 1958-06-11
US6089022A (en) * 1998-03-18 2000-07-18 Mobil Oil Corporation Regasification of liquefied natural gas (LNG) aboard a transport vessel
US6598408B1 (en) * 2002-03-29 2003-07-29 El Paso Corporation Method and apparatus for transporting LNG
NO330955B1 (en) * 2003-04-30 2011-08-22 Torp Tech As Unloading and cargo evaporation device for ships
WO2005043034A1 (en) * 2003-10-29 2005-05-12 Shell Internationale Research Maatschappij B.V. Vaporizing systems for liquified natural gas storage and receiving structures
US20060075762A1 (en) * 2004-09-16 2006-04-13 Wijngaarden Wim V LNG regas

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