Shell-and-tube heat exchangers that utilize one or more foam heat transfer units engaged with the tubes to enhance the heat transfer between first and second fluids. The foam of the heat transfer units can be any thermally conductive foam material that enhances heat transfer. In an embodiment, a liq
Shell-and-tube heat exchangers that utilize one or more foam heat transfer units engaged with the tubes to enhance the heat transfer between first and second fluids. The foam of the heat transfer units can be any thermally conductive foam material that enhances heat transfer. In an embodiment, a liquid distribution unit is employed that sprays a fluid to maximize the energy transfer through the use of large surface/volume ratio of the sprayed fluid. The spraying can be used in combination with or separately from the foam heat transfer units. Also, the tubes can be helically twisted around the liquid distribution unit so that the sprayed fluid impinges on the tubes. The shell-and-tube heat exchangers described herein are highly efficient, inexpensive to build, and corrosion resistant. The heat exchangers can be configured as an evaporator, a condenser, or for single phase cooling or heating thermal transfer applications.
대표청구항▼
1. A heat exchange evaporator, comprising: a shell having a longitudinal axis;a tube bundle disposed within the shell, the tube bundle comprising: a plurality of first tubes configured to convey a first fluid;a first tube sheet; anda second tube sheet, wherein the plurality of first tubes are arrang
1. A heat exchange evaporator, comprising: a shell having a longitudinal axis;a tube bundle disposed within the shell, the tube bundle comprising: a plurality of first tubes configured to convey a first fluid;a first tube sheet; anda second tube sheet, wherein the plurality of first tubes are arranged parallel to the longitudinal axis, each of the plurality of first tubes comprising: an outer surface;a first end joined to the first tube sheet in a manner to prevent fluid leakage between the first end and the first tube sheet; anda second end joined to the second tube sheet in a manner to prevent fluid leakage between the second end and the second tube sheet;a heat transfer member connected to and in thermal contact with the outer surfaces of the plurality of first tubes, the heat transfer member configured to provide a downward cross-flow, the heat transfer member comprising graphite foam;anda liquid distribution tube disposed within the shell parallel to the longitudinal axis, the liquid distribution tube is configured to spray a second liquid within the shell and cascade over the heat transfer member in a downward cross-flow pattern. 2. The heat exchange evaporator according to claim 1, wherein the first end and the second end of each first tube of the plurality of first tubes are joined to the first tube sheet and the second tube sheet respectively by friction-stir welded joints. 3. The heat exchange evaporator according to claim 1, wherein the shell, the first tube sheet, and the second tube sheet collectively define a chamber that contains the plurality of first tubes, the heat transfer member and the liquid distribution tube. 4. The heat exchange evaporator according to claim 1, wherein the heat transfer member consists of graphite foam. 5. The heat exchange evaporator according to claim 1, wherein the heat transfer member comprises a plurality of heat transfer members axially spaced from one another along the longitudinal axis of the shell. 6. The heat exchange evaporator according to claim 1, wherein the heat transfer member is bonded to the outer surfaces of the plurality of first tubes with a thermally conductive adhesive. 7. The heat exchange evaporator according to claim 6, comprising conductive ligaments disposed within the thermally conductive adhesive, the conductive ligaments being in intimate contact with the outer surfaces. 8. The heat exchange evaporator according to claim 1, wherein the liquid distribution tube comprises a plurality of liquid distribution tubes. 9. The heat exchange evaporator according to claim 8, wherein each of the plurality of liquid distribution tubes extends through a respective opening in the heat transfer member. 10. The heat exchange evaporator according to claim 8, wherein at least one of the plurality of liquid distribution tubes is disposed above the tube bundle, and at least one of the plurality of liquid distribution tubes is disposed within the tube bundle. 11. The heat exchange evaporator according to claim 8, wherein the plurality of liquid distribution tubes are disposed within the tube bundle. 12. The heat exchange evaporator according to claim 5, wherein each of the heat transfer members has a substantially wedge-shaped body, and the plurality of the heat transfer members are configured to form a baffle assembly around the plurality of first tubes. 13. The heat exchange evaporator according to claim 12, further comprising a metal plate joined to at least one of the heat transfer members. 14. The heat exchange evaporator according to claim 12, wherein the baffle assembly forms a substantially helix-shape. 15. The heat exchange evaporator according to claim 1, wherein the tubes of the plurality of first tubes are disposed so as to surround the liquid distribution tube, the liquid distribution tube configured to spray the second fluid therefrom in multiple directions so as to impinge on the outer surfaces of the tubes of the plurality of first tubes. 16. The heat exchange evaporator according to claim 1, wherein the longitudinal axis of the shell and the plurality of first tubes are oriented horizontally or vertically. 17. The heat exchange evaporator according to claim 1, wherein the plurality of first tubes and the liquid distribution tube are made of metal. 18. The heat exchange evaporator according to claim 1, wherein the liquid distribution tube has an end that penetrates and is directly attached to the first tube sheet and an opposite end that penetrates and is directly attached to the second tube sheet. 19. The heat exchange evaporator according to claim 8, wherein the plurality of liquid distribution tubes are cylindrical. 20. The heat exchanger evaporator of claim 1, wherein the heat transfer member comprises a perimeter edge coupled to an interior surface of the shell around an entire interior perimeter of the shell. 21. A heat exchange evaporator, comprising: a shell having a longitudinal axis;a tube bundle disposed within the shell, the tube bundle comprising: a plurality of first tubes configured to convey a first fluid;a first tube sheet; anda second tube sheet, wherein the plurality of first tubes are arranged parallel to the longitudinal axis, each of the plurality of first tubes comprising: an outer surface;a first end joined to the first tube sheet in a manner to prevent fluid leakage between the first end and the first tube sheet; anda second end joined to the second tube sheet in a manner to prevent fluid leakage between the second end and the second tube sheet;a plurality of circular heat transfer members, each circular heat transfer member connected to and in thermal contact with the outer surfaces of the plurality of first tubes, each of the circular heat transfer members comprising graphite foam, wherein the circular heat transfer members are axially spaced from one another along the tube bundle; anda liquid distribution tube disposed within the shell parallel to the longitudinal axis, the liquid distribution tube is configured to spray a second liquid within the shell, the liquid distribution tube having a first diameter,wherein each of the circular heat transfer members includes a plurality of tube openings therethrough, each of the plurality of first tubes extending through and in contact with a respective one of the plurality of tube openings,wherein each of the circular heat transfer members further includes at least one fluid conducting opening therethrough to permit fluid communication between opposite sides of the circular heat transfer member, the liquid distribution tube extending through the fluid conducting opening,wherein each fluid conducting opening has a second diameter larger than the first diameter of the liquid distribution tube, thereby forming a gap between the liquid distribution tube and the fluid conducting opening for fluid communication through the gap. 22. The heat exchange evaporator according to claim 21, wherein each of the circular heat transfer members includes a funnel-shaped, concave portion surrounding the fluid conducting opening. 23. A heat exchanger tube bundle, comprising: a first tube sheet and a second tube sheet spaced from the first tube sheet;a fluid distribution tube configured to spray a fluid in multiple directions therefrom, the fluid distribution tube having an end that penetrates and is directly attached to the first tube sheet and an opposite end that penetrates and is directly attached to the second tube sheet;a plurality of fluid carrying tubes disposed around the fluid distribution tube, wherein fluid sprayed from the fluid distribution tube is configured to impinge on outer surfaces of the plurality of fluid carrying tubes, each fluid carrying tube having an end that penetrates and is directly attached to the first tube sheet and an opposite end that penetrates and is directly attached to the second tube sheet; anda circular foam heat transfer member connected to and in thermal contact with the plurality of fluid carrying tubes, the circular foam heat transfer member comprising a circular outer perimeter edge configured to prevent flow of the fluid between the outer perimeter edge and an interior surface of a shell. 24. The heat exchanger tube bundle according to claim 23, wherein the plurality of fluid carrying tubes are helically twisted about the fluid distribution tube. 25. The heat exchanger tube bundle according to claim 23, wherein the fluid distribution tube and the plurality of fluid carrying tubes are made of metal; the first tube sheet and the second tube sheet are made of a metal; the metal of the fluid distribution tube and the plurality of fluid carrying tubes and the metal of the first tube sheet and the second tube sheet are the same; the ends of the fluid carrying tubes are friction stir welded to the first and second tube sheets; and the ends of the fluid distribution tube are friction stir welded to the first and second tube sheets. 26. The heat exchanger tube bundle according to claim 23, wherein the fluid sprayed by the fluid distribution tube is a liquid, and the fluid carried by the fluid carrying tubes is a liquid. 27. A heat transfer member for use in a heat exchanger, comprising: a body that consists essentially of graphite foam material, the body including first and second major surfaces and a perimeter edge, the perimeter edge being devoid of openings therethrough;a plurality of tube openings extending through the body from the first major surface to the second major surface, the tube openings having central axes that are parallel to each other, each tube opening configured to connect to an outer surface of a heat exchange tube for establishing thermal contact between the graphite foam material and the heat exchange tube; anda fluid conducting opening extending through the body from the first major surface to the second major surface, the fluid conducting opening having a central axis that is parallel to the central axes of the tube openings. 28. The heat transfer member of claim 27, further comprising a funnel-shaped, concave portion formed in the first major surface or the second major surface and surrounding the fluid conducting opening. 29. The heat transfer member of claim 27, wherein the fluid conducting opening comprises a plurality of fluid conducting openings.
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이 특허에 인용된 특허 (63)
Kretzinger Karl F. (Simi Valley CA), Annular recuperator.
Burrage Lawrence M. (S. Milwaukee WI) Guertin Jacques P. (Cupertino CA), Method and apparatus for forming compact bodies from conductive and non-conductive powders.
Godsey Randall D. (Palatine IL) Svacha Roy E. (North Barrington IL) Crawford James V. (Barrington Hills IL) Janowski Kenneth R. (Wheaton IL), Method for producing improved heat transfer surface.
Divecha Amarnath P. (Falls Church VA) Ferrando William A. (Arlington VA) Hesse Philip W. (Ellicott City MD) Karmarkan Subhash D. (Great Falls VA), Method of bonding carbon-carbon and metal matrix composite structures.
Sonuparlak Birol (Newark DE) Hatton Kenneth S. (Wilmington DE) Landini Dennis J. (Newark DE) Canino Sylvia J. (Newark DE) Aghajanian Michael K. (Newark DE) Patel Aspi N. (Newark DE), Method of making ceramic composite bodies having a protective surface region thereon and bodies made thereby.
Flynn Robert J. (Great Falls VA) Cicchetti George J. (Great Falls VA) Coony Jonathan d\E. (Washington DC) Bush Lloyd A. (East Hampton NY), Ocean thermal energy conversion (OTEC) system.
Geary David F. (Severna Park MD) Flamm Katherine K. (Baltimore MD) Morrison Frank T. (Arnold MD), Segmental baffle high performance shell and tube heat exchanger.
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