Key information

Title
Heat Tube With Channel Structure
Application number
20150500
Case type
National
Status
30.10.2017 Patent meddelt (B1)
Filed
24.04.2015
Effective date
24.04.2015
Publicly available
25.10.2016
Next annual fee due
30.04.2027
Applicant
Goodtech Recovery Technology AS (NO)
Owner
CRONUS TECHNOLOGY AS (NO)
Inventor
Veroslav Sedlak (NO) et al.
Agent
ZACCO NORWAY AS (NO)
Granted
30.10.2017
Patent number
341387
Expiry date
24.04.2035

Abstract and drawing

Disclaimer: This text has been machine-scanned and may contain errors – please refer to "Publications" for legally binding content.
A heat tube system for transferring heat at high temperatures across large heat tube areas is provided. The objective is achieved by a channel structure defined by texture or a network of grooves provided into a first surface wherein the first surface is attached to a second surface, wherein at least parts of the first surface not provided with channel structure form at least one contact surface that is in mechanical attachment to the second surface. The technical effect is that the contact surface makes it possible to create heat tube systems håving large areas operating at high pressure while maintaining structural integrity.

Publications

B1A1
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Documents

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Date
 Date Doc. No. Process Case number In/Out Journal description To/from
 13.04.2021 02-01 Overdragelse av søknad/rettighet Endring av fullmektig 2021/03950 UT GH Forespørsel TANDBERG INNOVATION AS
 22.03.2021 01-02 Overdragelse av søknad/rettighet Endring av fullmektig 2021/03950 INN Generalfullmakt - signert av Cronus TANDBERG INNOVATION AS
 22.03.2021 01-01 Overdragelse av søknad/rettighet Endring av fullmektig 2021/03950 INN Generell henvendelse TANDBERG INNOVATION AS
 02.03.2021 19-01 Saksbehandling 20150500(341387) UT PT Varsel om betaling av årsavgift for år 4 + (3352) (PT20150500)
07.01.2021 02-01 Endring av fullmektig 2020/15815 UT GH Forespørsel ACAPO AS
 18.12.2020 01-02 Endring av fullmektig 2020/15815 INN Endring av Fullmektigverv ACAPO AS
 18.12.2020 01-01 Endring av fullmektig 2020/15815 INN Generell henvendelse ACAPO AS
 01.11.2017 18-01 Saksbehandling 20150500 UT PT Registreringsbrev Nasjonal Patent (15)
05.09.2017 17-01 Saksbehandling 20150500 UT PT Meddelelse om patent Acapo AS
 29.05.2017 16-03 Saksbehandling 20150500 INN Hovedbrev Acapo AS
 29.05.2017 16-02 Saksbehandling 20150500 INN Krav Acapo AS
 29.05.2017 16-01 Saksbehandling 20150500 INN Korrespondanse (Hovedbrev inn) Acapo AS
 02.03.2017 15-01 Saksbehandling 20150500 UT PT Batch Varsel om betaling av første årsavgift (3317)
28.02.2017 14-01 Saksbehandling 20150500 UT Realitet patent Acapo AS
 16.01.2017 13-03 Saksbehandling 20150500 INN Hovedbrev Acapo AS
 16.01.2017 13-02 Saksbehandling 20150500 INN Beskrivelse Acapo AS
 16.01.2017 13-01 Saksbehandling 20150500 INN Korrespondanse (Hovedbrev inn) Acapo AS
 15.10.2016 12-01 Saksbehandling 20150500 UT Realitet patent Acapo AS
 13.07.2016 11-03 Saksbehandling 20150500 INN Hovedbrev Acapo AS
 13.07.2016 11-02 Saksbehandling 20150500 INN Beskrivelse Acapo AS
 13.07.2016 11-01 Saksbehandling 20150500 INN Korrespondanse (Hovedbrev inn) Acapo AS
 24.05.2016 10-02 Saksbehandling 20150500 INN Hovedbrev Acapo AS
 24.05.2016 10-01 Saksbehandling 20150500 INN Korrespondanse (Hovedbrev inn) Acapo AS
 25.04.2016 07-01 Saksbehandling 20150500 UT Bekreftelse på patentsøknad Acapo AS
 20.04.2016 09-01 Saksbehandling 20150500 INN Korrespondanse (Hovedbrev inn) Acapo AS
 19.04.2016 08-02 Saksbehandling 20150500 INN Hovedbrev Acapo AS
 19.04.2016 08-01 Saksbehandling 20150500 INN Korrespondanse (Hovedbrev inn) Acapo AS
 24.11.2015 06-02 Saksbehandling 20150500 UT PT report 08:53:10
24.11.2015 06-01 Saksbehandling 20150500 UT Realitet patent Acapo AS
 22.05.2015 05-02 Saksbehandling 20150500 INN Erklæring Søkers rett til oppfinnelse Acapo AS
 22.05.2015 05-01 Saksbehandling 20150500 INN Korrespondanse (Hovedbrev inn) Acapo AS
 07.05.2015 04-01 Saksbehandling 20150500 INN Mottatt e-post
30.04.2015 03-01 Saksbehandling 20150500 UT Formalia 1 Acapo AS
 30.04.2015 02-01 Saksbehandling 20150500 UT Infobrev til oppfinner Acapo AS
 24.04.2015 01-04 Saksbehandling 20150500 INN Fullmakt
24.04.2015 01-03 Saksbehandling 20150500 INN Beskrivelse
24.04.2015 01-02 Saksbehandling 20150500 INN Tegninger
24.04.2015 01-01 Saksbehandling 20150500 INN Søknadsskjema Patent

Description, claims and drawings

Disclaimer: This text has been machine-scanned and may contain errors – please refer to "Publications" for legally binding content. Description
The invention relates to heat transfer systems in general and more specifically a system for transferring heat at high temperatures across large heat tube areas.From prior art one should refer to heat pipes. These are efficient in transferring large amounts of heat by use of phase change of a working fluid. There are two-dimensional (or 2D) heat pipes where heat is absorbed across a flat surface from a device, typically for use in cooling electronics such as semiconductor chips. These operate at low temperatures. At high temperatures the pressure will increase and the heat pipe will at one point convert all the working fluid into vapour phase and the flat surface will deform, possibly by ballooning and thus also reduce effective contact area. This will typically cause permanent damage to the heat pipe and subsequently permanent damage to the device. Alternatively there are heat pipes shaped as a tube, optionally with bends and/or with heat spreaders. While this heat pipe has a good mechanical strength for high pressure the problem is the small contact surface to the device. Heat spreaders or shaped cavities for attachment to heat pipes will improve the efficiency, nevertheless complexity will increase.Also the use of traditional heat pipes will require the use of a mantle such as an aluminium profile enclosing the heat tubes and bring the heat tubes into thermal contact with the large surface to be cooled. This adds complexity and thermal resistance between heat tubes typically made of steel and the aluminium mantle. Moreover there can be problems relating to the different coefficients of expansion between the different parts.References should also be made to grooved plate heat exchangers. While the structures may be superficially similar these are stacked and used for heat exchangers and do not employ phase transittens in the working fluids.US 4931905 regards two metal plates håving U-shaped grooves formed therein so that the plates may form congruent halves wherein matching grooves independent heat pipes.US 2009/0101308 regards a heat pump device and method in which microchannel embedded pulsating heat pumps are incorporated into a substrate.US 5697428 regards a heat pipe comprising an unit plate håving one side formed with a groove which includes a plurality of straight portions arranged in parallel with each other and a plurality of turnings, and a plat plate disposed on the one side of the unit plate.Therefore, a main objective of the present invention is to provide a compact heat transfer system capable of transferring large amounts of heat across a large area while operating at high temperatures.The objective is achieved according to the invention by a heat tube assembly as defined in the preamble of claim 1, håving the features of the characterising portion of claim 1, a redundancy heat tube assembly as defined in the preamble of claim 13, håving the features of the characterising portion of claim 13, and an interleaved redundancy heat tube assembly as defined in the preamble of claim 14, håving the features of the characterising portion of claim 14.A number of non-exhaustive embodiments, variants or alternatives of the invention are defined by the dependent claims.The present invention attains the above-described objective by a channel structure defined by texture or a network of grooves provided into a first surface wherein the first surface is attached to a second surface, wherein at least parts of the first surface not provided with channel structure form at least one contact surface that is in mechanical attachment to the second surface.In one embodiment the channel structure is at least one groove. Preferably the embodiment comprises a condenser assembly, wherein the condenser assembly is an internal condensation unit. Alternatively the condenser assembly is an external condensation unit and preferably the heat tube is provided with a condensation unit that is bonded to the heat tube assembly, more preferably he first and second surface and the condensation unit are diffusion bonded into to the heat tube assembly.In another embodiment least one of the first and second surface is adapted to be mechanically attached to a surface to be cooled, preferably the heat tube assembly is provided with means for attachment, wherein the means for attachment is preferably at least one attachment hole through the first surface and the second surface.The technical difference over traditional two-dimensional heat pipes is the contact surface connecting a first and a second surface providing mechanical strength to the device according to that present invention. Heat enters the system through the first surface and brings a working fluid enclosed by the first and second surfaces to boil. As working fluid evaporates the pressure increases and the internal contact surface maintains the integrity of the shape of the device.The technical effect of this difference is that the contact surface provides a substantially improved mechanical strength to the heat tube and thus maintains structural integrity and also flatness even at high internal pressure, as well as larger effective evaporation/condensation surface area.• the mechanical strength from the contact surface makes it possible to scale up the size of the heat tube• the channel structure can be further provided with a wicking surface for allowing return of liquid against gravity forcesThe above and further features of the invention are set forth with particularity in the appended claims and together with advantages thereof will become clearerfrom consideration of the following detailed description of an exemplary embodiment of the invention given with reference to the accompanying drawings.The invention will be further described below in connection with exemplary embodiments which are schematically shown in the drawings, wherein:Figure 2a shows a side view of the first embodiment, disclosed in Figure 1 Figure 2b shows a front view of the first embodiment, disclosed in Figure 1 Figure 2c shows a cross section A-A of the first embodiment, disclosed in Figure 1, Figure 3a shows first embodiment of structure for grooves håving a semi circular cross section, Figure 3b shows second embodiment of structure for grooves håving a rectangular cross section, Figure 3c shows third embodiment of structure for grooves håving a rectangular cross section with overhang, Figure 3d shows fourth embodiment of structure for grooves håving a triangular cross section,Figure 5 shows an exploded view of an embodiment where a first and a second surface are provided with a channel structure.Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein one skilled in the art should appreciate that the scope of the disclosure is intended to cover any aspect of the disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the disclosure is intended to cover such an apparatus or method which is practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of a claim.The invention will be further described in connection with exemplary embodiments which are schematically shown in the drawings, wherein Fig. 1 shows an assembled 3D model of a heat tube.By heat tube there are two embodiments intended: "heat pipe" where a wick or other capillary effect pulls the liquid back to the hot end, and "thermosyphon"where the gravity pulls the liquid back to the hot end. The hot end is also known as the evaporation section. Both principles can be applied for this invention, though a thermosyphon it is preferred that the tube body is provided with a substantially downward inclination so that fluid in the liquid phase can run down the length of the tube. Since heat tubes of either type operate by removing heat by phase transition liquid to gas, it is required that the heat tube allows liquid to reach the lowest point in the heat tube to avoid burn-out.Central in the invention is the realisation that a heat tube can be provided with sufficient mechanical strength to withstand pressure induced deformation by using an internal structure that connect a first surface with a second surface. A texture or a network of grooves provided into a first surface wherein the first surface is mechanically attached to a second surface, wherein at least parts of the first surface not provided with texture or grooves form contact surfaces that are in mechanical attachment to the second surface.The first surface is located opposite a second surface and together these enclose a volume within the texture or network of grooves containing a working fluid. On applying heat the temperature rises and at least some working fluid undergoes a phase transition from liquid to gas. In response to the increased pressure a force proportional to pressure and pressure exposed area is applied to the first surface. If the first and second surface are of equal area the second surface is subjected to a force equal in magnitude but in the opposite direction. The contact surfaces connecting the first and second surface connect and thus absorb these forces and thus maintain the integrity of the shape of the first and second surface.A sidewall can optionally also be attached to the periphery of the first and second surface to provide improved sealing and mechanical strength.It should be noted that a heat tube at room temperature can be at a significantly lower pressure than normal atmospheric pressure, typically to lowerthe boiling point of the working fluid. Thus, prior to bringing the working fluid to boil the air pressure will exert a significantly inward pressure across the first and second surfaces, possibly sufficient to cause damage by non-elastic deformation. Even elastic deformation can be harmful as it will reduce heat transport capacity in parts and cause localised damage to the part to be cooled by the heat tube. Also in this case the contact surfaces will assist in maintaining structural integrity of the heat tubeThe embodiment of the apparatus 100 according to the invention shown in Fig. 2a - 2c comprises a heat tube 100 hot end 130 comprising a first surface 134 and a second surface 135 opposite the first surface that together enclose a volume for containing a working fluid. A network of grooves 141 is formed into the surface of the first surface facing the second surface, connecting these mechanically by the contact surfaces that remain where grooves are not formed. The first and second surfaces are then preferably diffusion bonded together so that the contact surfaces of the first surface contacts the second surface. The periphery is also in contact, sealing in the volume created by the grooves, thus creating a set of channels.The channels can be at least one contiguous channel, a plurality of parallel channels or a combination thereof.At an upper end of the hot end a cold end is located, more preferably attached, even more preferably attached as an integral unit. At the cold end a condensation unit 120 is placed. The condensation uses a cooling fluid flowing through fluid connectors 124 to remove heat. In a preferred embodiment a condensation unit is formed by a similar set of grooves and is attached, more preferably formed in the above described diffusion bonding process. Preferably the condensation unit is provided on both sides of the cold end, effectively sandwiching the cold end. The result is a compact condensation unit in good thermal contact with the cold end and separated by a surface, wherein the surface is the opposite surface of the first surface and/or the second surface. This means that the heat tube system can operate at a pressure independent of the condensation unit. It should be noted that the condensation unit does not have to be operating using phase transition. Preferably cooling fluid flows through the condensation unit grooves.At the condensation unit 120 a cooling fluid enters a first fluid connector, into the cold end with the condensation unit where heat is removed from the fluid in gas phase and transferred to the cooling fluid, and out through a second fluid connector.In a typical embodiment heat is absorbed through the first surface or the second surface. It is preferred that when heat is absorbed through one surface the opposite surface is corrugated to provide further mechanical stability.This structure is also beneficial for production. In a preferred example a prefabricated channel structure is sandwiched between a first and second metal sheet wherein the metal sheets are maintained in parallel as the sheets are bonded. Bonding can be performed using a wide range of methods from diffusion bonding, welding, casting, soldering, sintering and gluing.The sandwiched structure is made from metal sheets of the desired size or cut to size. The sheets can also be used to pre-stress the sandwiched structure in order to provide a more linear thermal expansion on heating the completed heat tube.Fig. 2c shows a cross section how the channel structure is positioned inside heat tube.The surfaces are typically made from metal or other materials such as ceramics or plastic and selected according to the working fluid used. When using water as working fluid it is preferred to use stainless steel or copper for all surfaces that are in contact with the working fluid.The channel structure can take on several embodiments, each håving different advantages. Figure 3a shows first embodiment of structure for grooves håving a semi circular cross section. Such a structure avoids sharp corners where cracks can form and start propagating. This type of groove can be made using photolithographic methods wherein a photoresist is placed on a surface and then exposed to define a pattern. Depending on process either the exposed or unexposed photoresist is removed. Then the material exposed through the removed photoresist is etched. Such etching can be performed by wet chemistry such as etching in acid, forming rounded etched structures. Figure 3b shows second embodiment of structure for grooves håving a rectangular cross section. Such structures can be created as above, using dry etch techniques instead of wet chemistry etching. Plasma etching is one example. Figure 3c shows third embodiment of structure for grooves håving a rectangular cross section with overhang, a structure that also can be made using undercut etching. The advantage is to provide a channel structure håving a satisfactory volume while at the same time providing the surface with an enlarged contact surface compared to a structure håving no overhand. Figure 3d shows fourth embodiment of structure for grooves håving a triangular cross section. Such structure can easily be formed by scouring with a needle or knife like tool, or by embossing.Sharp corners can represent a structural weakness, a risk of crack formation. It can therefore be advantageous to post process such structures, such as the ones shown in Figs. 3b - 3d to round sharp corners. Wet etching is one such possibility.Heat tubes operate by exploiting phase transitions and for evaporation as well as for condensation it is beneficial to provide the surface with nucleation sites, for instance by providing a surface texture to the channel structure. This can be provided using wet chemistry etching, for instance using isotropic or anisotropic etching.A texture is another embodiment of the channels disclosed above. Many means for creating such textures exist such as annealing and recrystallization wherein crystals grow from the surface. The peaks of these structures then effectively form the contact surfaces and the areas feeding the crystal growths provide the volume for the working fluid.The channel structure can also be provided with a wicking surface to allow for transport of working fluid in the liquid phase against the gravity.The channel structures are best seen in a side view and are used in a structure best illustrated in a front view of the first surface. In several embodiments the structure is any geometrical pattern that provides for heat transport, particularly by fluid flow over as much as possible over the heat tube area, preferably that allows circulation across the heat tube, in particular between the lower and upper end of the heat tube. Specific embodiments are disclosed below. Figure 4a shows first embodiment with a geometrical pattern which allows the transport of both liquid and gas phases everywhere between the first and the second surfaces of the heat tube, specifically a circular pattern, wherein the circles represent the contact surfaces and the channel structures surround each circle. This allows for fluid to flow freely horizontally and vertically. This has the advantage of avoiding local burnout which can happen when many smaller cylindrical heat tubes are used where a single failure can lead to localized damage. Figure 4b shows a second embodiment of T-shaped pattern, wherein each "T" represents a contact surface. This pattern provides a larger channel structure volume and ensures turbulent fluid flow and thus mixing. Figure 4c shows a third embodiment of a first square pattern, wherein each square is the contact surface. Each square is aligned with the upper surface horizontally. The square shape is easy for production. Preferably the corners are rounded. Figure 4d shows fourth embodiment of a second square pattern, turned 45 degrees compared to that shown in Fig. 4c. Also this square shape is easy forproduction and has the added advantage that allow a betterflow from top to bottom because there is no horizontal surface where the condensate could be stuck.It is important to attach the hot end closely to the surface that is to be cooled. To this end it is preferred to provide the hot end with means for attachment 136. These can be in the form of attachment holes or attachment slits, typically provided around the edge of the hot end.It is preferred that the first and the second surfaces and the optional sidewalls should have a similar coefficient of thermal expansion comparable to avoid warping. This can be done using materials of matching properties, pre tensioning, profiling to impart a specific thermal expansion or a combination of these means.A number of variations on the above can be envisaged. For instance the first and the second surface can be shaped other than flat, for instance cylindrical in order to be suited for attachment to existing pipes.As an alternative to diffusion bonding a wide range of methods from welding, casting, soldering, sintering and gluing can be employed. After attachment the sheets are provided with a surface finish, optionally provided with longitudinal tracks for receiving thermal pasteIn some embodiments it is beneficial to use a thermal paste between the heat absorbing surfaces and the objects to be cooled.In an alternative embodiment the heat tube is brazed, soldered or glued to the object to be cooled.Figure 5 shows a side view of an embodiment where a first and a second surface are provided with a channel structure. For the cost of added cost of patterning two surfaces it is possible to achieve a larger channel structure volume and also force the working fluid to meander between the first and the second surface and thus also provide a larger effective surface area.In an alternative embodiment heat can enter the heat tube through both the first and the second surface. This can be useful when extracting heat from a fluid flowing across said surfaces.While it is preferred to use sheet metal for forming the structures it is also possible to use thicker metal plates. Plates can be pre formed by for instance moulding or patterned using rollers. Said patterns can optionally then be further machined using dry or wet chemical action, electro etching, scouring, stamping or other methods known for imparting a structure into a surface.The structure can also be formed by 3D printing, or additive printing, built up from a base or additively formed on a metal base, such as a metal sheet.In case of problems with the heat exchanger at the condensation side it is advantageous to provide the heat tube assembly with cooling fins.Instead of an open and/or repetitive pattern a meander pattern, once can use a pattern where one channel meanders across the phase of the first surface. Alternatively a plurality of channels, optionally parallel channels, is used.If a heat tube fails for some reason there is a risk that the entire area no longer is cooled which in the case of aluminium electrolysis cells would be serious. To provide a measure of redundancy the assembly could comprise a plurality of sub units in the form of heat tube assemblies as describe above.For convenience the assembly could be made in a form håving the same physical dimensions as a single large heat tube. Advantageously the fluid connectors 124 inlets and outlets to the heat exchangers could be provided with manifolds and have a single inlet and a single outlet and more advantageously in the same positions as for a single large heat tube.More preferably the size of each sub unit could be selected to be of a size and shape so that if it were to fail the system would be still operational. For the case of an aluminium cell a person skilled in the art would realise that the sub units adjacent to the failed sub unit would have to provide sufficient cooling to avoid run out.To improve redundancy the fluid connectors 124 could be provided with redundancy. This can be achieved using An interleaved redundancy heat tube assembly comprising a plurality of sub units of heat tube assemblies håving a condense assembly, wherein the sub units are interleaved in groups håving common fluid cooling of condensation units. Thus for instance a first pair of manifolds for fluid connectors would provide cooling to odd numbered sub units and a second pair of manifolds for fluid connectors would provide cooling to even numbered sub units. This could be further increased to higher order interleaving.The invention according to the application finds use in transferring heat from heat sources. One example is keeping uniform temperature across the surface of an electrolysis cell sidewall of the Hall-Héroult aluminium electrolysis cells. Another example is recovering heat from exhaust gases from industrial processes.
Claims
1. A heat tube assembly (100) comprisinga hot end (130) and a cold end (120), wherein the hot end further comprisesa first surface (134), anda second surface (135),wherein the first surface is attached to a second surface,wherein the channel structure is at least one groove,wherein at least one of the first and second surface is provided with a channel structure (140), andat least parts of the first surface not provided with the channel structure forms at least one contact surface (137) that is in mechanical attachment to the second surface,characterised in that the heat tube assembly further comprises a condenser assembly,wherein the condenser assembly (120, 140) is an external condensation unit bonded to the heat tube assembly.2. The heat tube assembly according to claim 1, wherein the channel structure (140, 141) is provided with a wicking surface.3. The heat tube assembly according to claims 1, wherein the first and second surface and the condensation unit are diffusion bonded to the heat tube assembly.4. The heat tube assembly according to claim 1, wherein at least one of the first and second surface is adapted to be mechanically attached to a surface to be cooled.5. The heat tube assembly according to claims 1 - 4, wherein the heat tube assembly further comprises cooling fins.6. A redundancy heat tube assembly comprising a plurality of sub units of heat tube assemblies according to claim 1.7. An interleaved redundancy heat tube assembly comprising a plurality of sub units of heat tube assemblies according to claim 1, wherein the sub units are interleaved in groups håving common fluid cooling of condensation units. 1. En varmerørsammenstilling (100) omfattendeen varm ende (130) og en kald ende (120), idet den varme enden ytterligere omfatteren første overflate (134) ogen andre overflate (135),idet den første overflaten er festet til en andre overflate,idet kanalstrukturen er i det minste et første spor,idet i det minste en av den første og andre overflaten er anordnet med en kanalstruktur (140), ogi det minste deler av den første overflaten ikke anordnet med kanalstrukturen danner i det minste en kontaktoverflate (137) som er i mekanisk feste til den andre overflaten,karakterisert ved at varmerørsammenstillingen ytterligere omfatter en kondensatorsammenstilling,idet kondensatorsammenstillingen (120, 140) er en ekstern kondensatorenhet festet til varmerørsammenstillingen. 2. Varmerørsammenstillingen ifølge krav 1, idet kanalstrukturen (140, 141) er anordnet med en vekestruktur. 3. Varmerørsammenstillingen ifølge krav 1, idet den første og andre overflaten og kondensatorenheten er diffusjonsfestet til varmerørsammenstillingen. 4. Varmerørsammenstillingen ifølge krav 1, idet i det minste én av den første og andre overflaten er innrettet for å bli mekanisk festet til en overflate som skal kjøles. 5. Varmerørsammenstillingen ifølge krav 1 - 4, idet varmerørsammenstillingen ytterligere omfatter kjølefinner. 6. En redundant varmerørsammenstilling omfattende flere sub-enheter av varmerørsammenstillinger ifølge krav 1. 7. En innfelt redundant varmerørsammenstilling omfattende flere sub-enheter av varmerørsammenstillinger ifølge krav 1, idet sub-enhetene er innfelt i grupper som har felles fluidkjøling av kondensatorenheter.
Drawings

Priority

No priority

Patent classes

IPC classesF28D 15/02CPC classesF28D 15/025

Citations

US 4931905 A (A)US 2009/0101308 A1 (A1)US 5697428 A (A)US 2004/0069455 A1 (A1)GB 2498373 A (A)US 2010/071880 A1 (A1)

Applicants, owners and inventors

Owners
CRONUS TECHNOLOGY AS
Østre Aker vei 19 0581 OSLO NO (OSLO Municipality, Oslo county)Org. number: 916627955Inventors
Veroslav Sedlak
c/o Goodtech Recovery Technology AS, Per Krohgs vei 4 1065 OSLO NO (OSLO Municipality, Oslo county)
Didier Ostorero
c/o Goodtech Recovery Technology AS, Per Krohgs vei 4 1065 OSLO NO (OSLO Municipality, Oslo county)

Agent

ZACCO NORWAY AS
ZACCO NORWAY AS

Org. number: 982702887

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Open in The Brønnøysund Register Centre
Postboks 488 0213 OSLO NO (OSLO Municipality, Oslo county)
Org. number: 982702887
Reference: P33143NO00

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