GB2534860A - Heat dissipation system - Google Patents

Heat dissipation system Download PDF

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Publication number
GB2534860A
GB2534860A GB1501581.1A GB201501581A GB2534860A GB 2534860 A GB2534860 A GB 2534860A GB 201501581 A GB201501581 A GB 201501581A GB 2534860 A GB2534860 A GB 2534860A
Authority
GB
United Kingdom
Prior art keywords
heat exchanger
wall
channel
cooling fluid
heat
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.)
Withdrawn
Application number
GB1501581.1A
Other versions
GB201501581D0 (en
Inventor
Reed Matthew
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Marine Current Turbines Ltd
Original Assignee
Marine Current Turbines Ltd
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 Marine Current Turbines Ltd filed Critical Marine Current Turbines Ltd
Priority to GB1501581.1A priority Critical patent/GB2534860A/en
Publication of GB201501581D0 publication Critical patent/GB201501581D0/en
Publication of GB2534860A publication Critical patent/GB2534860A/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P3/00—Liquid cooling
    • F01P3/20—Cooling circuits not specific to a single part of engine or machine
    • F01P3/207—Cooling circuits not specific to a single part of engine or machine liquid-to-liquid heat-exchanging relative to marine vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
    • F03B13/10—Submerged units incorporating electric generators or motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03B—MACHINES OR ENGINES FOR LIQUIDS
    • F03B17/00—Other machines or engines
    • F03B17/06—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head"
    • F03B17/061—Other machines or engines using liquid flow with predominantly kinetic energy conversion, e.g. of swinging-flap type, "run-of-river", "ultra-low head" with rotation axis substantially in flow direction
    • 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
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H21/00—Use of propulsion power plant or units on vessels
    • B63H21/38—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like
    • B63H21/383—Apparatus or methods specially adapted for use on marine vessels, for handling power plant or unit liquids, e.g. lubricants, coolants, fuels or the like for handling cooling-water
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P2050/00—Applications
    • F01P2050/02—Marine engines
    • F01P2050/06—Marine engines using liquid-to-liquid heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/20—Heat transfer, e.g. cooling
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/20—Hydro energy
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/30—Energy from the sea, e.g. using wave energy or salinity gradient
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T50/00—Aeronautics or air transport
    • Y02T50/60—Efficient propulsion technologies, e.g. for aircraft

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Ocean & Marine Engineering (AREA)
  • Power Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A heat exchanger 7 is arranged in contact with a submerged outer wall of an underwater or floating structure, e.g. with the nacelle of a subsea turbine 1 or with a ship hull, in order to dissipate heat through the outer wall to the surrounding body of water. Thus there is no need to penetrate the outer wall of the structure in order to form conduits supplying seawater to the heat exchange area, which could lead to the formation of deposits within the conduits, corrosion and water leaks. The channel (15, fig. 3A) for circulation of the cooling fluid within the heat exchanger may be formed between two panels (12, fig. 3A) proper to the heat exchanger. Alternatively, the channel may be formed in part by the submerged outer wall (18, fig. 4) of the underwater or floating structure. Circulation of the cooling fluid, e.g. fresh water, between the heat exchanger and the equipment 3 to be cooled may be effected via a pump 5. Baffles (16, fig. 3A, 4) may be present within the heat exchanger to form a tortuous path for the coolant and enhance heat exchange.

Description

HEAT DISSIPATION SYSTEM
This invention relates to a heat dissipation system, in particular for a submersible or floating installation.
In underwater installations, or in floating vessels, whether capable of independent propulsion or not, there is often a large amount of equipment, both primary and auxiliary, which generates heat. As submersible or floating installations are typically enclosed structures, it is necessary to dissipate heat energy produced by the equipment inside the enclosed structure, without an increase in ambient temperature inside the enclosed subsea structure.
Conventionally, plate or tube heat exchangers have been used inside the vessel or installation, where heated coolant from the equipment to be cooled is pumped though a primary side of the heat exchanger and sea water, sucked through an inlet pipe in the hull or in the installation housing, is pumped through a secondary side, then pumped out again having extracted the heat from the primary side coolant, thereby dissipating the energy from the primary side to the secondary side of the heat exchanger and out into the water. Alternatively, a refrigeration system is used to take heat from the coolant being pumped through equipment. However, the heat energy from the refrigeration system still has to be dissipated, usually through a heat exchanger of the type described above.
A problem with using this type of heat exchanger in underwater installations is that it is difficult to keep the pipes free of deposits, sand or sediments carried in with the water and the effectiveness of the cooling deteriorates to a point at which the heat exchanger has to be removed for cleaning, or replaced entirely. In addition, the entry and exit holes through the hull for the sea water to enter and exit may eventually start to leak. Drilling holes and welding pipes to these also compromises the structural integrity of the hull or housing to some extent.
In accordance with a first aspect of the present invention, a heat dissipation system for a submersible or floating installation comprises a housing and a heat exchanger, wherein the housing comprises an outer wall of the submersible or floating installation, in contact, when in use, with water in which the installation is submerged or floating; wherein the heat exchanger comprises a fluid tight enclosure having a channel for circulating cooling fluid; and, wherein the channel is thermally coupled to the outer wall of the housing, such that heat in the circulating cooling fluid is dissipated through the outer wall into the water.
The present invention overcomes the problems of deposit build up in the tubes of the heat exchanger by using a heat exchanger with only clean cooling water inside the vessel and transferring heat by conduction through the hull to the sea, so also avoiding openings in structural plates.
The channel may be formed by welding baffles directly onto the outer walls, or alternatively, the channel is formed between two panels of the heat exchanger.
In this case the panel in contact with the outer wall is thin and has good thermal conductivity.
Preferably, at least one of the panels is thermally conducting.
Preferably, one panel of the fluid tight enclosure, remote from the outer wall, is thermally insulating.
In one embodiment, the channel is formed directly on an inner surface of the outer wall of the installation.
Preferably, the heat exchanger further comprises a fluid inlet to the enclosure adapted to receive heated cooling fluid from equipment to be cooled, a fluid outlet from the enclosure adapted to output cooled cooling fluid; and a pump, to pump the cooling fluid along the channel between the inlet and the outlet.
Preferably, the length of the channel is extended by positioning baffles perpendicular to and between two parallel surfaces of the heat exchanger to route the circulation of cooling fluid within the enclosure.
In accordance with a second aspect of the present invention, a heat exchanger for a heat dissipation system in a subsea or floating installation, the heat exchanger comprising a fluid tight enclosure comprising a cooling fluid inlet, a cooling fluid outlet and a channel for circulating cooling fluid between the inlet and outlet; the heat exchanger being adapted for installation on an inner surface of an outer wall of a subsea or floating installation, the outer wall being in contact with water.
An example of a heat dissipation system according to the present invention will 30 now be described with reference to the accompanying drawings in which: Fig.1 illustrates an example of a heat dissipation system according to the present invention, installed in a subsea installation from which heat from equipment needs to be removed; Fig.2 illustrates an example of a heat dissipation system according to the present invention, installed in a floating vessel from which heat from equipment needs to be removed; Fig.3a illustrates more detail of the heat dissipation system according to the present invention, showing a perspective view from the front; Fig.3b illustrates the example of Fig.3a, seen from the rear; Fig.4 shows the heat dissipation system of Figs.3a and 3b in plan view; and, Fig.5 illustrates the coolant flow path in the heat exchanger of Figs.3a and 3b.
As described above, underwater installations, or floating vessels, often have equipment which generates waste heat that needs to be removed to prevent the environment in the installation or vessel from becoming too hot for the equipment to operate effectively. Particular examples of this are subsea turbine hubs and powertrains or offshore supply vessels and merchant ships adapted as drilling platforms in deepwater locations, but the invention's applicability is not limited to such applications.
Fig.1 illustrates a subsea turbine 1, all mounted on a pile 2 well below the surface 8 of the sea. Equipment 3 in the powertrain 4 generates heat and is cooled by a flow of coolant pumped by a pump 5 through pipes 6, close to and in thermal contact with a housing of the equipment, which extract heat and carry it to a heat exchanger 7. The coolant is typically fresh water, although proprietary coolants could be used. Suitable additives may be added to the fresh water to discourage the growth of biological organisms, or prevent deposits from the water from blocking up the pipes. Fig.2 illustrates a similar heat dissipation system installed in a floating vessel 9. The pump 5 and heat exchanger 7 may be connected to several different sets of pipes 6a, 6b for different equipment 3a, 3b. As can be seen in the illustrations of Figs.1 and 2, the heat exchanger is located beneath the surface of the water when in use.
Figs.3a and 3b shows more detail of how the heat exchanger of the system of the present invention is constructed to fit inside 19 a vessel or subsea structure. The heat exchanger in this example, as shown in Fig.3a, comprises a rectangular panel 12 with an external framework 14. A rectangular design is the most efficient in terms of construction and use of material, but the precise shape of the frame and the panels may be adapted to the available space where it is to be used and is not limited to a rectangular arrangement.
A channel 15 is formed within the framework by baffles 16 which have been fixed in place, for example by welding to panel 12. The channels formed on one surface of the panel 12 are in contact with the inner surface 17 of an outer wall 18 of a housing of the installation, such as the hull of the vessel or the powertrain housing (see Fig.4) and welded along the edge of the frame to fix the frame 14 and channels 15 formed on the panel 12 to the outer wall. An alternative is to form the channel 15 within the framework 14 by fixing the baffles 16 directly to the inner surface 17 of an outer wall of the hull of the vessel or the housing of the installation, which is in contact with the seawater 20, rather than onto the panel first. The frame 14, panel 12 and baffles 15 form a fluid tight enclosure with the inner surface 17. From the outside of the enclosure, at one end of the channel 15 formed by the baffles to allow the flow of coolant in the heat exchanger, a coolant inlet 22 is mounted in the panel 12 receiving coolant through pipe 11 and at the other end of the channel, a coolant outlet 21 is mounted in the panel connected to an outlet pipe 10. The baffles 16 are preferably arranged longitudinally, parallel to the long sides of the frame 12, as shown in Fig.3, as this minimises the number of individual components that need to be worked on during the construction, but multiple transverse baffles could also be used.
Fig.3b illustrates the heat exchanger as view from behind. The rear surface 13 of panel 12 may be provided with lateral stiffeners on the surface and fitted to the frame 14. Fig.4 shows how the heat exchanger is able to use the inner surface 17 of the outside wall 18 as the bottom surface of the coolant channel 15, with the external frame 14 and baffles 16 welded into place directly on the outside wall.
In Fig.5, the coolant flow path 23 through the channel is illustrated. Heated coolant from the equipment cooling circuit 6 is pumped into the heat exchanger through pipe 11 and inlet 22 and follows the flow path 23 along the channel 15 to the outlet 21, guided by the baffle plates 16, to ensure sufficient circulation to cool the coolant and prevent the coolant taking a short cut. From the outlet, the cooled liquid is returned to the cooling circuit 6. The large body of relatively cold fluid from the sea water, or tidal race, outside the vessel, or installation and the conductive panel 13 of the enclosure in contact with the hull or housing means that the coolant is cooled very effectively as passes along the channel. The coolant emerging from the outlet 22 is then returned to the cooling circuit 6 of the equipment to extract more heat from the equipment. As much as 100kW of heat can be removed using six heat exchangers of this type with approximate dimensions of 2.5m long x 0.5m wide x 0.1m deep. Typically, the depth of the channel 15 that is formed between panel 12 and the outside wall is between lOmm and 20mm, ensuring that the cooling fluid flows close to the outer wall with good thermal contact.
The present invention overcomes the problems of prior art pumped heat exchangers by fabricating the side of the heat exchanger which receives the heated coolant, onto the inside of the outer metal wall of an enclosed subsea structure, below the surface of the water. Pumping heated coolant through this primary side transfers heat energy to the outer wall by convection, the heat passes through the outside wall by conduction and then into the surrounding sea water by convection. The surrounding sea water acts as the secondary side of the heat exchanger with the outer wall acting as the barrier between the primary and secondary side. Where the channel is constructed on a metal base plate, rather than directly onto the inner surface of the outer water of the structure or the hull of the vessel, then there is an additional conduction process transferring the heat through that base plate to the outer wall, before the heat is dissipated in the sea.
Whether constructing the channel directly onto the outer wall, or not, the invention has the advantage over conventional pumped heat exchangers that there is no need to penetrate the wall of the structure with a sea water inlet and seawater outlet pipe to extract the heat from the coolant. This also means that the outer wall retains its structural integrity and does not provide an opportunity for sea water leaking through the outer wall, as may happen in conventional heat exchangers if welds around the pipe penetrating the wall were to fail.
Removing the need for a piped secondary cooling side enclosure in the heat exchanger addresses the problem of conventional tube or pipe heat exchangers which use sea water cooling blocking up with deposits and needing periodic cleaning. In the present invention, fresh water, or proprietary coolant is used on the chamber side of the heat exchanger, so conventional inhibitors or additives may be used to keep clean the heat exchange surfaces of the channel though which the coolant flows. The design is simple to construct and can be adapted as needed to the shape of the outer wall surface for good contact.

Claims (8)

  1. CLAIMS1. A heat dissipation system for a submersible or floating installation, the system comprising a housing and a heat exchanger, wherein the housing comprises an outer wall of the submersible or floating installation, in contact, when in use, with water in which the installation is submerged or floating; wherein the heat exchanger comprises a fluid tight enclosure having a channel for circulating cooling fluid; and, wherein the channel is thermally coupled to the outer wall of the housing, such that heat in the circulating cooling fluid is dissipated through the outer wall into the water.
  2. 2. A system according to claim 1, wherein the channel is formed between two panels of the heat exchanger.
  3. 3. A system according to claim 2, wherein at least one of the panels is thermally conducting.
  4. 4. A system according to claim 2 or claim 3, wherein one panel of the fluid tight enclosure, remote from the outer wall, is thermally insulating.
  5. 5. A system according to any preceding claim, wherein the channel is formed directly on an inner surface of the outer wall of the installation.
  6. 6. A system according to any preceding claim, wherein the heat exchanger further comprises a fluid inlet to the enclosure adapted to receive heated cooling fluid from equipment to be cooled, a fluid outlet from the enclosure adapted to output cooled cooling fluid; and a pump, to pump the cooling fluid along the channel between the inlet and the outlet.
  7. 7. A system according to any preceding claim, wherein the length of the channel is extended by positioning baffles perpendicular to and between two parallel surfaces of the heat exchanger to route the circulation of cooling fluid within the enclosure.
  8. 8. A heat exchanger for a heat dissipation system in a subsea or floating installation, the heat exchanger comprising a fluid tight enclosure comprising a cooling fluid inlet, a cooling fluid outlet and a channel for circulating cooling fluid between the inlet and outlet; the heat exchanger being adapted for installation on an inner surface of an outer wall of a subsea or floating installation, the outer wall being in contact with water.
GB1501581.1A 2015-01-30 2015-01-30 Heat dissipation system Withdrawn GB2534860A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1501581.1A GB2534860A (en) 2015-01-30 2015-01-30 Heat dissipation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1501581.1A GB2534860A (en) 2015-01-30 2015-01-30 Heat dissipation system

Publications (2)

Publication Number Publication Date
GB201501581D0 GB201501581D0 (en) 2015-03-18
GB2534860A true GB2534860A (en) 2016-08-10

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GB1501581.1A Withdrawn GB2534860A (en) 2015-01-30 2015-01-30 Heat dissipation system

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE384313C (en) * 1923-11-17 Julius Loewy Cooling process and cooling device for marine internal combustion engines
US4269599A (en) * 1978-08-30 1981-05-26 Zhestkov Vladimir M Cooling system of self-propelled floating crane engines
GB2073402A (en) * 1980-03-25 1981-10-14 Hamworthy Engineering Cooling means for waterborne vessels
FR2835502A1 (en) * 2002-02-05 2003-08-08 Laurent Andre Claude Granier Closed-circuit heat exchange system for aquatic vehicles and marine engines uses submerged portions of engine housing as part of radiator
GB2420593A (en) * 2004-11-29 2006-05-31 Gibbs Tech Ltd Exhaust cooling system of an amphibious vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE384313C (en) * 1923-11-17 Julius Loewy Cooling process and cooling device for marine internal combustion engines
US4269599A (en) * 1978-08-30 1981-05-26 Zhestkov Vladimir M Cooling system of self-propelled floating crane engines
GB2073402A (en) * 1980-03-25 1981-10-14 Hamworthy Engineering Cooling means for waterborne vessels
FR2835502A1 (en) * 2002-02-05 2003-08-08 Laurent Andre Claude Granier Closed-circuit heat exchange system for aquatic vehicles and marine engines uses submerged portions of engine housing as part of radiator
GB2420593A (en) * 2004-11-29 2006-05-31 Gibbs Tech Ltd Exhaust cooling system of an amphibious vehicle

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