DK154017B - SHIP WITH LARGE BALL TANKS FOR TRANSPORTING LIQUID GAS - Google Patents

SHIP WITH LARGE BALL TANKS FOR TRANSPORTING LIQUID GAS Download PDF

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Publication number
DK154017B
DK154017B DK521070AA DK521070A DK154017B DK 154017 B DK154017 B DK 154017B DK 521070A A DK521070A A DK 521070AA DK 521070 A DK521070 A DK 521070A DK 154017 B DK154017 B DK 154017B
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DK
Denmark
Prior art keywords
tank
ship
skirt
ball
ball tank
Prior art date
Application number
DK521070AA
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Danish (da)
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DK154017C (en
Inventor
Solberg Olav
Ragnar Bognaes
Original Assignee
Kvaerner Brug Kjoleavdelning
Moss Rosenberg Verft As
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Publication of DK154017B publication Critical patent/DK154017B/en
Application granted granted Critical
Publication of DK154017C publication Critical patent/DK154017C/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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/08—Mounting arrangements for vessels
    • F17C13/082—Mounting arrangements for vessels for large sea-borne storage vessels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B25/00—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby
    • B63B25/02—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods
    • B63B25/08—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid
    • B63B25/12—Load-accommodating arrangements, e.g. stowing, trimming; Vessels characterised thereby for bulk goods fluid closed
    • 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
    • F17C2201/01—Shape
    • F17C2201/0128—Shape spherical or elliptical
    • 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
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/013—Two or more vessels
    • 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/037—Containing pollutant, e.g. H2S, Cl
    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00—Receptacles
    • Y10S220/901—Liquified gas content, cryogenic

Landscapes

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

Description

XX

DK 154017 BDK 154017 B

Opfindelsen angår et skib med et skrog, hvori der er monteret store kugletanke for flydende gas.The invention relates to a ship with a hull in which large liquid gas ball tanks are mounted.

Ved søværts transport af flydende gas opstår der flere problemer, som i hovedsagen skyldes skibets bevæ-5 gelser i søen og de lave transporttemperaturer i lasten.In the seaward transport of liquid gas, several problems arise, which are mainly due to the ship's movements in the lake and the low transport temperatures in the cargo.

Da et skib under sine bevægelser i søen vil udsættes for såvel bøjning som vridning, kan man ikke betragte skibsskroget som et statisk fundament for beholdere.Since a ship during its movements in the lake will be subjected to both bending and twisting, the ship's hull cannot be considered a static foundation for containers.

Foruden de mekanisk betingede bevægelser forekommer 10 der termisk betingede bevægelser. Kugletanke har en betydelig størrelse, og den optrædende store temperaturdifferens vil medføre, at de termiske bevægelser bliver betydelige.In addition to the mechanically conditioned motions, there are thermally conditioned motions. Ball tanks have a considerable size and the large temperature difference occurring will cause the thermal movements to become significant.

Til en lejring af store beholdere ombord i skibe stil-15 les der således modstridende krav. Lejringen må kunne optage skibsskrogets bevægelser og de termiske bevægelser, samtidig med at den må være tilstrækkelig stiv til at kunne bære vægten af lasten.Consequently, conflicting requirements are set for the storage of large containers aboard ships. The bearing must be able to absorb the ship's hull movements and the thermal movements while being sufficiently rigid to support the weight of the cargo.

Ved lejring af tanke på land kan man med fordel an-20 vende kraftige og stive bærekonstruktioner, såsom søjler. Sådanne bærekonstruktioner vil imidlertid være for store og pladskrævende at anvende ombord i et skib, hvis de overhovedet skal kunne modstå de forskellige kræfter, som kommer til virkning under skibets bevægelser i søen.When storing tanks on land, it is advantageous to use strong and rigid supporting structures, such as columns. However, such carrier structures will be too large and space-consuming to use on board a ship if they are to be able to withstand the various forces that come into effect during the ship's movements in the sea.

25 Til lejring af separate tanke ombord i skibe er det kendt at anvende støttearrangementer med bevægelige led indbygget i konstruktionen. Det er desuden kendt at ophænge kugletanke i fjederorganer.25 For the storage of separate tanks aboard ships, it is known to use supporting arrangements with movable joints built into the structure. In addition, it is known to hang ball tanks in spring means.

Opfindelsen har til formål at udforme det indled-30 ningsvis omhandlede skib på en sådan måde, at kugletankene og deres lejringer kommer til at indgå som dele af skibskonstruktionen, så man kan opnå en effekt med gensidig påvirkning mellem kugletankene og selve skibsskro get.The invention has for its object to design the ship referred to in the introduction in such a way that the ball tanks and their bearings will be included as parts of the ship structure so that an effect with mutual influence between the ball tanks and the ship hull itself can be achieved.

35 Til opnåelse heraf er skibet ifølge opfindelsen ejendommeligt ved, at hver kugletank ved svejsning er indspændt i selve skibsskroget ved hjælp af en i og for sig kendt cylindrisk eller svagt konisk kontinuerlig 2In order to achieve this, the ship according to the invention is characterized in that each ball tank is welded into the ship's hull itself by means of a cylindrical or slightly conical continuous known per se.

DK 154017 BDK 154017 B

pladekonstruktion i form af et vertikalt tankskørt, der strækker sig op til kugletankens ækvatorialplan, og at tankskørtet er isoleret delvis på en sådan måde, at tankskørtet foroven får tilnærmelsesvis samme tempera-5 tur som kugletanken, medens tankskørtet forneden får tilnærmelsesvis samme temperatur som i skibsrummet omkring kugletanken.plate structure in the form of a vertical tank skirt extending up to the equatorial plane of the ball tank, and the tank skirt being partially insulated in such a way that the tank skirt at the top gets approximately the same temperature as the ball tank, while the tank skirt below gets approximately the same temperature as at the skirt around the bullet tank.

Med denne udformning opnår man en konstruktion, hvor de af lejringen forårsagede bøjningsmomenter i 10 kugletanken reduceres til et minimum, hvortil kommer, at konstruktionen bliver billig i fremstilling, fordi det drejer sig om en ren pladekonstruktion. På grund af konstruktionens enkelhed kan de nødvendige spændingsanalyser også gennemføres med en høj grad af sikkerhed.With this design, a structure is obtained in which the bending moments caused by the bearing in the 10 ball tank are reduced to a minimum, in addition the construction becomes cheap in production because it is a clean sheet structure. Due to the simplicity of the construction, the necessary stress analyzes can also be carried out with a high degree of certainty.

15 Tankskørtet giver en gunstig overføring af kræfter mellem kugletanken og selve skibsskroget, idet man undgår store excentriciteter. På grund af den rundgående forbindelse mellem kugletanken og skibsskroget får man også en gunstig overføring af horisontale og vertikale 20 kræfter under skibets bevægelser i søen. Man opnår desuden en eliminering eller vidtgående begrænsning af varmespændinger forårsaget af kugletankens krympning i forhold til skibsskroget.15 The tank skirt provides a favorable transfer of forces between the ball tank and the ship's hull itself, avoiding large eccentricities. Due to the circular connection between the ball tank and the ship's hull, a favorable transfer of horizontal and vertical forces is also obtained during the ship's movements in the lake. In addition, an elimination or far-reaching reduction of heat stresses caused by the shrinkage of the ball tank relative to the ship's hull is achieved.

En fordelagtig udførelsesform for skibet ifølge 25 opfindelsen er ejendommelig ved, at isoleringen er udeladt i den inderste del af det kileformede rum, der er dannet mellem tankskørtet og kugletanken, og som strækker sig rundt om kugletanken, og at der i den nævnte inderste del af det kileformede rum er anbragt et 30 varmeledende medium. Denne udformning medvirker til at opretholde i hvert fald tilnærmelsesvis samme temperatur i indsvejsningsområdet i ækvatorialplanet som i selve kugletanken.An advantageous embodiment of the ship according to the invention is characterized in that the insulation is omitted in the innermost part of the wedge-shaped space formed between the tank skirt and the ball tank, which extends around the ball tank and in the said inner part of the tank. the wedge-shaped space is provided with a heat-conducting medium. This design helps maintain at least approximately the same temperature in the welding region in the equatorial plane as in the ball tank itself.

En anden fordelagtig udførelsesform for skibet 35 ifølge opfindelsen er ejendommelig ved, at tankskørtet er tilknyttet kugletanken ved hjælp af en i og for sig kendt overgangskonstruktion, som er indskudt mellem tankskørtet og kugletanken. Denne overgangskonstruktion 3Another advantageous embodiment of the ship 35 according to the invention is characterized in that the tank skirt is connected to the ball tank by means of a transitional structure known per se which is interposed between the tank skirt and the ball tank. This transitional structure 3

DK 154017 BDK 154017 B

kan hensigtsmæssigt være udført som en ækvatorialring i kugletanken.may conveniently be designed as an equatorial ring in the ball tank.

Opfindelsen forklares nærmere i det følgende ved en foretrukken udførelsesform under henvisning til 5 tegningen, hvor fig. 1 viser skematisk et snit gennem et skib med en i dettes skrog indspændt kugletank, fig. 2 et snit i større skala gennem tankskørtet og en del af kugletanken i fig. 1, med antydet isola-10 tion af kugletanken og tankskørtet, og fig. 3 et vertikalsnit i større skala gennem overgangen mellem tankskørtet og kugletanken.The invention will be further explained in the following by a preferred embodiment with reference to the drawing, in which fig. 1 is a schematic sectional view of a ship with a ball tank mounted in its hull; FIG. 2 is a larger-scale section through the tank skirt and part of the ball tank of FIG. 1, with the indicated insulation of the ball tank and the tank skirt; and FIG. 3 shows a larger scale vertical section through the transition between the tank skirt and the ball tank.

I fig. 1 er skibet generelt betegnet med 1.In FIG. 1, the ship is generally designated 1.

Skibet har sidetanke 2 og 4 og bundtanke 3. Et 15 cylindrisk tankskørt 5 strækker sig opad fra skibets indre bund og er fastsvejst til denne. Tankskørtet 5 strækker sig op til ækvatorialplanet 7 for en kugletank 6 og er i dette område svejseforbundet med kugletanken.The ship has side tanks 2 and 4 and bottom tanks 3. A 15 cylindrical tank skirt 5 extends upwards from the inner bottom of the ship and is welded to it. The tank skirt 5 extends up to the equatorial plane 7 of a ball tank 6 and in this area is welded to the ball tank.

20 Når flydende gas, såsom methan, der lagres med en temperatur på ca. -160°C, fyldes i kugletanken 6, vil denne trække sig sammen. Her kommer fordelen ved tankskørtet 5 tydeligere frem. Tankskørtet 5 tjener til udligning af kugletanken 6's sammentrækning, så 25 bevægelsen ikke overføres til selve skibsskroget. For yderligere at hindre termiske bevægelser er tankskørtet 5 isoleret delvis ved hjælp af en isolering 8, fig.2, der danner en fortsættelse af den for kugletanken 6 sædvanlige isolering 9. Ved hjælp af varmetekniske 30 beregninger kan man bestemme isoleringens udstrækning og form, så man opnår en temperaturgradient i tankskørtet 5, som resulterer i acceptable termiske spændinger.When liquid gas, such as methane, is stored at a temperature of approx. -160 ° C, filled into the ball tank 6, it will contract. Here, the advantage of the tank skirt 5 becomes clearer. The tank skirt 5 serves to equalize the contraction of the ball tank 6 so that the movement is not transferred to the ship's hull itself. To further prevent thermal movement, the tank skirt 5 is insulated in part by means of an insulation 8, FIG. a temperature gradient is obtained in the tank skirt 5 which results in acceptable thermal stresses.

I indsvejsningsområdet 10, fig. 2, mellem kugle-35 tanken 6 og tankskørtet 5 vil der være tilnærmelsesvis samme temperatur som i kugletanken, og opnåelsen af denne effekt forbedres ved, at der er anbragt et varme-ledende medium i et kileformet rum 11 mellem tank-In the weld region 10, FIG. 2, between the sphere tank 6 and the tank skirt 5, there will be approximately the same temperature as in the sphere tank, and the attainment of this effect is improved by the fact that a heat-conducting medium is placed in a wedge-shaped space 11 between the tank.

Claims (3)

1. Skib med et skrog, hvori der er monteret store kugletanke for flydende gas, kendetegnet 20 ved, at hver kugletank (6) ved svejsning er indspændt i selve skibsskroget (1) ved hjælp af en i og for sig kendt cylindrisk eller svagt konisk kontinuerlig pladekonstruktion i form af et vertikalt tankskørt (5), der strækker sig op til kugletankens (6) ækvatorialplan (7) , 25 og at tankskørtet (5) er isoleret delvis (ved 8) på en sådan måde, at tankskørtet (5) foroven får tilnærmelsesvis samme temperatur som kugletanken (6), medens tankskørtet (5) forneden får tilnærmelsesvis samme temperatur som i skibsrummet omkring kugletanken (6).Ship with a hull in which large liquid gas ball tanks are mounted, characterized in that each ball tank (6) is welded into the ship's hull (1) by means of a cylindrical or slightly conical known per se continuous plate construction in the form of a vertical tank skirt (5) extending up to the equatorial plane (7) of the ball tank (6), and the tank skirt (5) being partially insulated (at 8) in such a way that the tank skirt (5) at the top, the temperature of the ball tank (6) is approximately the same, while the tank skirt (5) at the bottom is approximately the same temperature as in the ship's space around the ball tank (6). 2. Skib ifølge krav 1, kendetegnet ved, at isoleringen er udeladt i den inderste del af det kileformede rum (11), der er dannet mellem tankskørtet (5) og kugletanken (6), og som strækker sig rundt om kugletanken (6), og at der i den nævnte inder-35 s te del af det kileformede riam (11) er anbragt et vameledende medium.Ship according to claim 1, characterized in that the insulation is omitted in the innermost part of the wedge-shaped space (11) formed between the tank skirt (5) and the ball tank (6), which extends around the ball tank (6) and that in the said inner 35s portion of the wedge-shaped frame (11) is provided a waveguide medium. 3. Skib ifølge krav 1 eller 2, kendetegnet ved, at tankskørtet (5) er tilknyttet kugietan- DK 154017 B ken (6) ved hjælp af en i og for sig kendt overgangskonstruktion (12), som er indskudt mellem tankskørtet (5) og kugletanken (6).Ship according to claim 1 or 2, characterized in that the tank skirt (5) is connected to the cargo tank (6) by means of a transition structure (12) known per se which is interposed between the tank skirt (5). and the ball tank (6).
DK521070A 1969-10-18 1970-10-14 SHIP WITH LARGE BALL TANKS FOR TRANSPORTING LIQUID GAS DK154017C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO414569 1969-10-18
NO4145/69A NO124471C (en) 1969-10-18 1969-10-18

Publications (2)

Publication Number Publication Date
DK154017B true DK154017B (en) 1988-10-03
DK154017C DK154017C (en) 1989-02-13

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ID=19880103

Family Applications (1)

Application Number Title Priority Date Filing Date
DK521070A DK154017C (en) 1969-10-18 1970-10-14 SHIP WITH LARGE BALL TANKS FOR TRANSPORTING LIQUID GAS

Country Status (11)

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US (1) US3680323A (en)
JP (1) JPS5120797B1 (en)
BE (1) BE757662A (en)
DE (1) DE2050759C3 (en)
DK (1) DK154017C (en)
ES (1) ES384657A1 (en)
FR (1) FR2066105A5 (en)
GB (1) GB1317940A (en)
NL (1) NL165122C (en)
NO (1) NO124471C (en)
SE (1) SE371981B (en)

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Publication number Publication date
ES384657A1 (en) 1973-07-16
DE2050759B2 (en) 1977-12-22
DE2050759C3 (en) 1984-11-08
FR2066105A5 (en) 1971-08-06
JPS5120797B1 (en) 1976-06-28
NL165122C (en) 1981-03-16
NL165122B (en) 1980-10-15
US3680323A (en) 1972-08-01
NL7015247A (en) 1971-04-20
NO124471B (en) 1972-04-24
SE371981B (en) 1974-12-09
DK154017C (en) 1989-02-13
DE2050759A1 (en) 1971-04-29
GB1317940A (en) 1973-05-23
NO124471C (en) 1975-01-02
BE757662A (en) 1971-04-01

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