EP3382312B1 - Échangeur thermique sous-marin - Google Patents
Échangeur thermique sous-marin Download PDFInfo
- Publication number
- EP3382312B1 EP3382312B1 EP17164210.1A EP17164210A EP3382312B1 EP 3382312 B1 EP3382312 B1 EP 3382312B1 EP 17164210 A EP17164210 A EP 17164210A EP 3382312 B1 EP3382312 B1 EP 3382312B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- heat exchanger
- subsea
- fluid
- inner pipe
- 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
Links
- 239000012530 fluid Substances 0.000 claims description 48
- 238000009413 insulation Methods 0.000 claims description 9
- 239000012809 cooling fluid Substances 0.000 claims description 7
- 238000004891 communication Methods 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 2
- 239000013535 sea water Substances 0.000 description 8
- 230000000712 assembly Effects 0.000 description 7
- 238000000429 assembly Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000001816 cooling Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002480 mineral oil Substances 0.000 description 1
- 235000010446 mineral oil Nutrition 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
- F28D7/106—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically consisting of two coaxial conduits or modules of two coaxial conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
- F28D1/0206—Heat exchangers immersed in a large body of liquid
- F28D1/022—Heat exchangers immersed in a large body of liquid for immersion in a natural body of water, e.g. marine radiators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/10—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged one within the other, e.g. concentrically
Definitions
- the present invention relates to a subsea heat exchanger, and particularly to a subsea heat exchanger for subsea assemblies.
- WO 2008/004886 A1 discloses a heat exchanger having the features in the preamble of claim 1.
- Subsea installations are assemblies comprising several apparatuses used under water. Said assemblies can be installed for example on the bottom ground of a sea.
- power transformers used under water can be mentioned.
- these power transformers comprise a tank filled with insulation and/or cooling fluid to encounter for the high pressure due to deep water depth.
- the other subsea liquid filled objects are subsea motors, subsea switchgears, subsea frequency converters, rectifiers and hydraulic store tanks.
- the power losses of the electrical installations inside the tank increase the temperature and volume of the insulation and/or cooling fluid.
- the volume variation is often compensated with a pressure compensator, which is in fluid communication with the tank of the installation.
- the insulation and/or cooling fluid is often cooled via the outer surface of the tank to the surrounding sea water. As the area of the outer surface of the tank is limited there is a need to provide additional cooling for the insulation and/or cooling fluid.
- An object of the present invention is to provide a subsea heat exchanger to solve the above problems.
- the objects of the invention are achieved by a subsea heat exchanger which is characterized by what is stated in the independent claims.
- the preferred embodiments of the invention are disclosed in the dependent claims.
- the invention is based on the idea of providing a subsea heat exchanger comprising a first and a second chamber.
- the first chamber comprising a fluid inlet and the second chamber comprising a fluid outlet, wherein the first chamber and the second chamber are connected with at least one outer pipe.
- the exchanger comprises an inner pipe surrounded by the outer pipe, a first end of the inner pipe extends into the first chamber and is connected to a first connection point in the first chamber, a second end of the inner pipe extends into the second chamber and is connected to a second connection point in the second chamber.
- Between the outer pipe and the inner pipe is a gap open to the first and the second chamber providing a fluid communication between the first chamber and the second chamber.
- the first and the second ends of the inner pipe are open providing a flow path of sea water through the inner pipe.
- the subsea heat exchanger of the invention can be driven by natural convection without any pumps. Further, the fluid volume in the heat exchanger is small compared to the outer surface available for heat transfer.
- the subsea heat exchanger provides also a scalable solution where the number and length of the pipes can be varied.
- Figure 1 shows a subsea heat exchanger.
- the subsea heat exchanger 1 comprises a first 2 and a second chamber 3.
- the first chamber 2 comprises a fluid 14 inlet 4 and the second chamber 3 comprises a fluid 14 outlet 5.
- the fluid 14 is indicated with arrows in Fig.1 .
- the first chamber 2 and the second chamber 3 are connected with at least one outer pipe 6.
- the heat exchanger 1 comprises an inner pipe 7 surrounded by the outer pipe 6.
- a first end 8 of the inner pipe 7 extends into the first chamber 2 and is connected to a first connection point 9a in the first chamber 2.
- a second end 10 of the inner pipe 7 extends into the second chamber 3 and is connected to a second connection point 9b in the second chamber 3.
- the first 8 and the second 10 ends of the inner pipe 7 are open to the surroundings providing a flow path of surrounding fluid 13 through the inner pipe 7.
- the surrounding fluid 13 flowing in the inner pipe 7 is sea water.
- An advantage of the heat exchanger 1 is the small volume for the fluid 14 between the outer pipes 6 and inner pipes 7 of the heat exchanger 1 compared to the surface available for the heat transfer from the fluid 14.
- the gap 12 between the outer pipe 6 and the inner pipe 7 form an annular flow channel for the fluid 14.
- the heat can be transferred from the fluid 14 through the inner wall and through the outer wall of the flow channel, i.e. through the wall of the inner pipe 7 and through the wall of outer pipe 6, to the surrounding fluid 13.
- Fig.2 shows a part view of a cross section of a subsea heat exchanger 1.
- the subsea heat exchanger 1 comprises a chamber 2 comprising a manifold 15.
- Figure 4 shows a perspective view of a cross section of a subsea heat exchanger 1 presenting a first 2 and a second chamber 3 comprising manifolds 15.
- the manifold 15 of the first chamber 2 and the manifold 15 of the second chamber 3 are connected with multiple outer pipes 6 and inner pipes 7.
- the manifold 15 comprises a substantially L shaped body 16.
- the body 16 comprises a horizontal 17 and a vertical portion 18.
- the vertical portion 18 comprises a connection to the fluid inlet 4 or to the fluid outlet 5.
- the manifold 15 may also comprise only a horizontal portion 18, to which a fluid inlet 4 or fluid outlet 5 can be attached.
- the connection points 9a-b to the outer pipes 6 and/or the connection points 11 the inner pipes 7 may be openings in the manifold 15 where the outer pipes 6 can be installed and joined.
- the connection points of outer pipes 6 and/or inner pipes 7 may comprise means for attaching, for instance sockets or flanges, for attaching the outer pipes 6 and/or inner pipes 7 to the manifold 15.
- the horizontal portion 17 comprises a first horizontal surface 19a and a second horizontal surface 19b.
- the first horizontal surface 19a comprises multiple first or second connection points 9a-b and the second horizontal surface 19b comprises connection points 11 of the outer pipes 6.
- the inner pipes 7 extend through the interior of the chambers 2,3.
- the connection points of the inner tubes 9a-b and the connection points of the outer tubes 11 are arranged on the opposed walls of the manifold 15, i.e. on the first 19a and second 19b horizontal surfaces.
- the fluid 14 entering the first chamber 2 is in a heat transfer contact with the inner pipes 7 before flowing into the gap 12.
- the fluid 14 flowing from the gap 12 is in a heat transfer contact with the inner pipes 7 before exiting the second chamber 3 through the fluid outlet 5.
- ends 8, 10 of the inner pipe 7 are on the level of the first horizontal surface 19a.
- ends 8, 10 of the inner pipe 7 protrude from the first horizontal surface 19a.
- the ends 8, 10 of the inner pipe 7 may comprise means for guiding the surrounding fluid 13 flow to and from the open ends 8, 10 of the inner pipes 7. Further, the ends 8, 10 of the inner pipes 7 open to the surrounding fluid 13 may be covered with a screen for preventing dirt entering the inner pipes 7.
- inlet 4 and/or outlet 5 comprises a circular pipe.
- the vertical portion 18 of the first chamber manifold 15 and the vertical portion of the second chamber manifold 18 are arranged on the same side of the heat exchanger 1 in the horizontal direction x.
- the heat exchanger 1 is arranged between two tanks then it is preferred to arrange the fluid inlet 4 of the first chamber 2 manifold 15 and the fluid outlet 5 of the second chamber 3 manifold 15 on the opposing sides of the heat exchanger 1 in the horizontal direction x.
- the heat exchanger 1 may be a welded construction where the outer pipe 6 and the inner pipe 7 are connected to the first 2 and the second chamber 3 by welding.
- the subsea heat exchanger 1 provides a scalable solution where the number and length of the inner 7 and outer 8 pipes can be varied for generating additional cooling.
- the subsea heat exchanger 1 can be dimensioned based on the required power for example for the insulation and/or cooling fluid in a subsea tank.
- Figure 3 shows a cross section of a subsea assembly 20 comprising a subsea heat exchanger 1.
- the subsea assembly 20 comprises a tank 21 comprising a fluid 14, for instance an insulation fluid or other fluid.
- the subsea heat exchanger 1 is in fluid communication with the tank 21.
- the subsea assembly 20 comprises a heat generating electric apparatus 22 located within the tank 21.
- the heat generating electric apparatus 22 is a subsea transformer and the fluid 14 in the tank is transformer oil.
- the transformer windings and a transformer core are located in the tank 21.
- the transformer oil is mineral oil or silicon oil, for instance.
- Examples of other heat generating apparatuses 22 are motors, switchgears, frequency converters, rectifiers and hydraulic store tanks.
- inlet 4 of the first chamber 2 and the outlet 5 of the second chamber 3 are connected to a wall of the tank 21 and the inlet 4 is positioned above the outlet 5 in vertical direction y.
- inlet 4 and the outlet 5 are positioned to arrange the outer pipes 6 to extend substantially in a vertical direction y.
- the tank 21 comprises insulation or cooling fluid, and transformer windings and a transformer core, an electric power switch and /or a variable speed drive are located within the tank 21.
- the subsea heat exchanger 1 can be driven by natural convection without any pumps or suction devices.
- the temperature difference between the fluid 14 in a subsea tank 21 and the surrounding fluid 13, sea water causes heat to transfer from the fluid 14 to the surrounding sea water.
- the heat transfer causes a temperature gradient to the fluid 14 and to the surrounding sea water in the pipes 6,7.
- the temperature gradient in the fluid 14 causes the fluid 14 to move downwards in the outer pipe 6.
- Respectively the temperature gradient in the surrounding sea water in the inner pipe 7 causes the sea water to move upwards in the inner pipe 7.
- the surrounding fluid 13 flow direction is indicated with small arrows and the fluid 14 flow direction is indicated with large arrows in Fig.3 .
- the subsea heat exchanger 1 may also be used for cooling in a subsea processing unit performing compression of gas from subsea fields or separation of well stream compounds. Then between the outer 6 and inner pipe 7 flows gas from subsea fields or a well stream compound.
- the subsea heat exchanger 1 can be used in a subsea environment, e.g. exist on the sea bed.
- the subsea heat exchanger 1 is also suitable for deep waters, where the water depth is high, 1000...3000 m, and the prevailing pressure is 100...300 bar.
- the water temperature in an ocean is typically 5-6°C in the depth of 1000 m and 0-3°C in the depth of 3000 m.
- the invented subsea heat exchanger 1 can be applied to different types of subsea assemblies 20.
- the subsea assemblies 20 may comprise insulation fluid or other fluid in a tank. Examples of such subsea assemblies are subsea motors, subsea switchgears, subsea frequency converters, rectifiers and hydraulic store tanks.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Claims (13)
- Echangeur thermique sous-marin (1) comprenant une première (2) et une seconde (3) chambre, la première chambre (2) comprenant une entrée de fluide (4) et la seconde chambre (3) comprenant une sortie de fluide (5), dans lequel la première chambre (2) et la seconde chambre (3) sont raccordées avec au moins un tuyau externe (6), caractérisé en ce que l'échangeur thermique (1) comprend un tuyau interne (7) entouré par le tuyau externe (6), une première extrémité (8) du tuyau interne (7) s'étend dans la première chambre (2) et est raccordée à un premier point de raccordement (9a) dans la première chambre (2), une seconde extrémité (10) du tuyau interne (7) s'étend dans la seconde chambre (3) et est raccordée à un second point de raccordement (9b) dans la seconde chambre (3), et entre le tuyau externe (6) et le tuyau interne (7), on trouve un espace (12) ouvert sur la première (2) et la seconde chambre (3) fournissant une communication de fluide entre la première chambre (2) et la seconde chambre (3), et la première (8) et la seconde extrémité (10) du tuyau interne (7) sont ouvertes, fournissant une trajectoire d'écoulement pour entourer le fluide (13) à travers le tuyau interne (7).
- Echangeur thermique sous-marin selon la revendication 1, caractérisé en ce que la première chambre (2) et la seconde chambre (3) comprennent des collecteurs (15), et le collecteur (15) de la première chambre et le collecteur (15) de la seconde chambre sont raccordés avec plusieurs tuyaux externes (6) et tuyaux internes (7).
- Echangeur thermique sous-marin selon la revendication 2, caractérisé en ce que le collecteur (15) comprend un corps sensiblement en forme de L (16) ayant une partie horizontale (17) et une partie verticale (18), dans lequel la partie verticale (18) comprend un raccordement à l'entrée (4) ou à la sortie (5) et la partie horizontale (17) comprend des points de raccordement (9a-b, 11) aux tuyaux externes (6) et aux tuyaux internes (7).
- Echangeur thermique sous-marin selon la revendication 3, caractérisé en ce que la partie horizontale (17) comprend une première surface horizontale (19a) et une seconde surface horizontale (19b), et la première surface horizontale (19a) comprend plusieurs premiers ou seconds points de raccordement (9a-b) et la seconde surface horizontale (19b) comprend des points de raccordement des tuyaux externes (11).
- Echangeur thermique sous-marin selon la revendication 4, caractérisé en ce que les extrémités (8, 10) du tuyau interne (7) sont sur le niveau de la première surface horizontale (19a).
- Echangeur thermique sous-marin selon la revendication 4, caractérisé en ce que les extrémités (8, 10) du tuyau interne (7) font saillie de la première surface horizontale (19a).
- Echangeur thermique sous-marin selon l'une quelconque des revendications 3 à 6, caractérisé en ce que l'entrée (4) et/ou la sortie (5) comprend un tuyau circulaire.
- Echangeur thermique sous-marin selon l'une quelconque des revendications 3 à 7, caractérisé en ce que la partie verticale (18) du collecteur (15) de la première chambre (2) et la partie verticale (18) du collecteur (15) de la seconde chambre (3) sont agencées du même côté de l'échangeur thermique dans la direction horizontale (x).
- Echangeur thermique sous-marin selon la revendication 1, caractérisé en ce que le tuyau externe (6) et le tuyau interne (7) sont raccordés à la première (2) et la seconde chambre (3) par soudage.
- Ensemble sous-marin comprenant l'échangeur thermique sous-marin selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'ensemble comprend un réservoir (21) et l'entrée (4) de la première chambre (2) et la sortie (5) de la seconde chambre (3) sont raccordées à une paroi du réservoir (21) et l'entrée (4) est positionnée au-dessus de la sortie (5) dans la direction verticale (y).
- Ensemble sous-marin selon la revendication 10, caractérisé en ce que l'entrée (4) et la sortie (5) sont positionnées pour agencer les tuyaux externes (6) pour s'étendre sensiblement dans une direction verticale (y).
- Ensemble sous-marin selon l'une quelconque des revendications 10 à 11, caractérisé en ce que le réservoir (21) comprend un fluide d'isolation ou de refroidissement, et des enroulements de transformateur et un noyau de transformateur, un commutateur électrique et/ou un entraînement à vitesse variable sont positionnés à l'intérieur du réservoir (21).
- Utilisation d'un échangeur thermique sous-marin (1) selon l'une quelconque des revendications 1 à 9, dans un environnement sous-marin.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DK17164210.1T DK3382312T3 (da) | 2017-03-31 | 2017-03-31 | En undersøisk varmeveksler |
EP17164210.1A EP3382312B1 (fr) | 2017-03-31 | 2017-03-31 | Échangeur thermique sous-marin |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17164210.1A EP3382312B1 (fr) | 2017-03-31 | 2017-03-31 | Échangeur thermique sous-marin |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3382312A1 EP3382312A1 (fr) | 2018-10-03 |
EP3382312B1 true EP3382312B1 (fr) | 2019-08-14 |
Family
ID=58464398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17164210.1A Active EP3382312B1 (fr) | 2017-03-31 | 2017-03-31 | Échangeur thermique sous-marin |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP3382312B1 (fr) |
DK (1) | DK3382312T3 (fr) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL1014030C2 (nl) * | 2000-01-06 | 2001-07-09 | Hei Tech Bv | Buisvormige warmtewisselaar. |
NO20063166L (no) * | 2006-07-07 | 2008-01-08 | Norsk Hydro Produksjon As | Arrangement for varmeveksler |
WO2015026237A1 (fr) * | 2013-08-20 | 2015-02-26 | Aker Subsea As | Échangeur de chaleur sous-marin, outil de nettoyage et procédé correspondant |
US9897386B2 (en) * | 2015-08-10 | 2018-02-20 | Indmar Products Company Inc. | Marine engine heat exchanger |
-
2017
- 2017-03-31 EP EP17164210.1A patent/EP3382312B1/fr active Active
- 2017-03-31 DK DK17164210.1T patent/DK3382312T3/da active
Non-Patent Citations (1)
Title |
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None * |
Also Published As
Publication number | Publication date |
---|---|
DK3382312T3 (da) | 2019-09-16 |
EP3382312A1 (fr) | 2018-10-03 |
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