Heat transfer

• US 20030056943A1
• Filed: 10/08/2002
• Published: 03/27/2003
• Est. Priority Date: 04/12/2000
• Status: Active Grant

• Current Assignee: Cheiros (Technology) Ltd.
• Original Assignee: Cheiros (Technology) Ltd.
• Inventors: Ivakhnenko, Igor, Dessiatoun, Serguei Vassilievich
• Granted Patent: US 6,994,155 B2
• Time in Patent Office: Days
• US Class Current: 165/142
• CPC Class Codes: F28D 2021/0029 Heat sinks
• CPC Class Codes: F28D 7/00 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
• CPC Class Codes: F28D 9/00 Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall F28F3/083, F28F3/086 take precedence
• CPC Class Codes: F28F 1/122 and being formed of wires
• CPC Class Codes: F28F 3/022 the means being wires or pins

Abstract

A heat transfer assembly is disclosed which comprises at least one wall (1, 2, 3) which is adapted to separate a first fluid at a first temperature from a second fluid at a second temperature, and at least one fibre member (6, 7, 8, 9) or plurality of them, each fibre member (6, 7, 8, 9) including at least one elongate fibre which extends substantially axially along the fibre member (6, 7, 8, 9) from the first fluid through the wall (1, 2, 3) and into the second fluid whereby in use heat is transferred from the first fluid to the second fluid or vice versa, and the entire heat transfer assembly or a part of it is assembled as a single unit by sewing/weaving/stitching technique.

Claims

1. A heat transfer assembly which comprises at least one wall which is adapted to separate a first fluid at a first temperature from a second fluid at a second temperature, and at least one fibre member or plurality of them, each fibre member including at least one elongate fibre which extends substantially axially along the fibre member from the first fluid through the wall and into the second fluid whereby in use heat is transferred from the first fluid to the second fluid or vice versa, and the entire heat transfer assembly or a part of it is assembled as a single unit by sewing/weaving/stitching technique.

2. A heat transfer assembly according to claim 1 in which the first and second fluids are received within respective first and second channels provided on opposing sides of the wall.

3. A heat transfer assembly according to claim 1 in which a stack of substantially parallel plates defining walls is provided with a channel being defined between adjacent walls.

4. A heat transfer assembly according to any preceding claim which comprises a heat exchanger.

5. A heat transfer assembly according to any preceding claim in which the first and second fluids comprise different fluids.

6. A heat transfer assembly according to any preceding claim in which each fibre member comprises at least one fibre, which is consisted from at least one ligament or plurality of them, or a number of fibres to form a fin or other structural element which adds to the rigidity of the finished structure.

7. A heat exchanger according to any preceding claim which is entirely fabricated from fibres that are woven or sewn together.

8. A heat exchanger according to claim 7 in which said entire fibre structure is impregnated with a matrix material.

21. A heat transfer assembly according to any preceding claim in which the walls are made from electrically non-conductive material and each of selected ones of the fibre members are made of electrically conductive material or are covered with electrically conductive material, and has an electrical charge applied to it/them

22. A heat transfer assembly according to any preceding claim in which the walls are made of electrically conductive material whilst the fibre members are electrically non-conductive, and walls are electrically charged.

25. Apparatus according to any preceding claim in which one or more of the fibre members include surface perforations or depressions.

26. Apparatus according to any preceding claim in which one or more of the fibre members surface is enhanced and improved for improved heat transfer and/or boiling nucleation purposes by any means including but not limiting to chemical technologies.

27. Apparatus according to any preceding claims in which one or more of the fibre or non-fibre members is adapted to form at least on capillary.

28. Apparatus according to any preceding claim in which the or each wall, structural member, or fibre member of the heat transfer assembly comprises a capillary structure.

29. Apparatus according to any one preceding claim in which the fibre members comprise at least one or plurality of threads/ligaments which are woven, threaded/sewn or/and bonded together.

30. A heat transfer assembly according to any preceding claim in which walls are of annular form.

31. Apparatus according to any preceding claim in which the or each wall comprises a woven/sewn sheet of fibres/ligaments.

32. A heat transfer assembly for a gas turbine or the like in which the heat transfer assembly is in accordance with any one of the preceding claims and has at least three concentrically arranged walls;

a first inner wall, an intermediate wall and a second outer wall defining at least two annular channels therebetween that surrounds at least a part of the entire gas turbine, one or more of the fibre members passing through the intermediate wall to transfer heat energy from fluid within the one channel to fluid inside the other channel.

33. A heat transfer assembly according to claim 32 in which an additional wall is provided which is concentric with the outer wall and which is adapted to define a further channel that may receive fluid such as water, and heat energy extracted from the exhaust gas being used to heat the water.

34. A heat transfer assembly according to claim 30, 31 or 32 in which the cylindrical channels are subdivided into smaller channels by a fibre structural member or baffle, and at least one or plurality of fibres penetrate walls and/or structural fibre member/baffle transferring heat energy between channels.

35. A gas turbine or other engine incorporating a heat transfer assembly according to any one of the claims 30 to 34.

36. Apparatus according to any preceding claim in which the fibre members are impregnated with a binding material to form a composite structure.

37. Apparatus according to claim 36 in which binding material is added to the fibres to produce the final composite assembly using the technique or mixture of techniques.

38. Apparatus according to any preceding claim in which fibre surfaces of fibre members are coated by one or more coatings.

39. Apparatus according to preceding claim 38 in which the fibre surfaces of fibre members are coated by one or more protective coatings of metal.

40. Apparatus according to any preceding claim in which the fibre members extend through the walls substantially orthogonal to the walls.

41. Apparatus according to any one of the preceding claims in which the fibre members and the wall define an obtuse or acute angle

42. Apparatus according to any preceding claim which further includes a reinforcing baffle which comprises a wavy sheet that is provided between the opposing walls of the channel and fixed to one wall at its crests and to the other wall at its troughs.

43. Apparatus according to claim 42 in which the reinforcing baffle is fabricated from porous, fibrous or solid matter and occupies one or more channels.

9. A heat transfer assembly comprising a device to be cooled or heated, one or more walls defining at least one channel and one or more fibre members which extend through the wall or walls from the heat source to the channel whereby in use heat from the object to be cooled is transferred through the wall and through the fibre members into the channel, and vice versa—

heat from the channel is transferred through the fibre members and through the wall to the object to be heated up.

10. A heat transfer assembly according to claim 9 in which the object to be cooled comprises a hot fluid or other heated body.

11. A heat transfer assembly according to claim 9 or claim 10 in which the object to be cooled or heated up comprises an electronic circuit.

12. A heat transfer assembly according to claim 9 or claim 10 in which the object to be cooled is mounted on a substrate which comprises a wall of the heat transfer assembly, or at least one or plurality of fibre members, or a wall and one or plurality of fibre members together.

13. A heat transfer assembly in which an electronic circuit is provided on a substrate according to claim 12 which is attached to at least one or plurality of fibre members extending therefrom through which heat generated by an electronic circuit can be dissipated.

14. A heat transfer assembly according to any one of claims 9-13 in which one or more electronically insulating layers are inserted between the substrate and an object to be cooled or heated up.

15. A heat transfer assembly according to any one of claims 10-14 in which the material of the substrate has substantially the same coefficient of expansion as the circuit to be cooled.

16. The heat transfer assembly of any one of claims 9-14 in which the substrate comprises at least one or plural fibre members.

17. The heat transfer assembly of any one of claims 13-16 in which the material of the object to be cooled or heated is deposited directly onto the substrate attached to the fibre members or onto fibre members, which can be at least one fibre or ligament

18. The heat transfer assembly of any one of claims 13-17 in which the material of at least one fibre member or plurality of fibre members is a semiconductor.

19. A heat transfer assembly according to any one of claims 13-18 in which one or more fibres of the fibre members are optically conductive and light can be transmitted into or out of electronics circuit

20. A heat transfer assembly of any one of claims 13-19 in which one more of the fibres of the fibre members are electronically conductive and encase, either wholly or partially the object to be cooled or heated up.

23. A heat transfer assembly such as a heat sink, comprising a hollow body having first and second open ends, an outer surface and an inner surface and which is provided with a plurality of fibre members that extend generally from a first interior surface of the body across the interior of the body to contact the interior surface of the body in a different area, and in which the body is adapted to contact the device to be cooled substantially at the first area so that the fibre members are in thermal contact with the device to be cooled.

24. The assembly of claim 23 in which a fan is provided which is attached towards one end of the hollow body.

44. Radiation heat and other radiation energy conversion and guiding assemblies comprising a substrate having at least two or plurality of fibre members extending therefrom in which each fibre member comprise one or plurality of fibre/ligaments of a special nature which are adapted to guide energy from one end of the fibre to the other end of the fibre, and/or to convert energy, to the most part, on the surface of the fibres, and control means for applying an electrical charge to the fibre members to control the direction and/or angle in which the energy is transferred.

45. Radiation heat and other radiation energy guiding/converting assembly according to claim 44 in which each fibre member has a surface layer which is adopted to improve reflection/conversion of energy on/from the surface.

46. Radiation heat and other radiation energy guiding/converting assembly according to claim 44 in which each fibre member has a surface layer which is adopted to convert radiation energy incident upon the surface of the fibre members into electrical energy.

47. Radiation heat and other radiation energy guiding/converting assembly according to claim 44 which includes fibre members which have optical transparency to guide light in the direction of each such member.