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A hollow fiber device includes a hollow fiber bundle, comprising a plurality of hollow fibers, a first tubesheet and a second tubesheet encapsulating respective distal ends of the hollow fiber bundle. The tubesheets have boreholes in fluid communication with bores of the hollow fibers. In at least o

A hollow fiber device includes a hollow fiber bundle, comprising a plurality of hollow fibers, a first tubesheet and a second tubesheet encapsulating respective distal ends of the hollow fiber bundle. The tubesheets have boreholes in fluid communication with bores of the hollow fibers. In at least one of the tubesheets, the boreholes are formed radially. The hollow fiber device can be utilized in heat exchange, in gas/gas, liquid/liquid and gas/liquid heat transfer, in combined heat and mass transfer and in fluid separation assemblies and processes. The design disclosed herein is light weight and compact and is particularly advantageous when the pressure of a first fluid introduced into the bores of hollow fibers is higher than the pressure on the shell side of the device.

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1. A heat transfer or a heat and mass transfer apparatus comprising: a) a cartridge including a hollow fiber bundle, comprising a plurality of hollow fibers, a first tubesheet and a second tubesheet encapsulating respective distal ends of the hollow fiber bundle, said tubesheets having boreholes in

1. A heat transfer or a heat and mass transfer apparatus comprising: a) a cartridge including a hollow fiber bundle, comprising a plurality of hollow fibers, a first tubesheet and a second tubesheet encapsulating respective distal ends of the hollow fiber bundle, said tubesheets having boreholes in fluid communication with bores of the hollow fibers;b) a housing surrounding the cartridge, wherein the housing has: i. a first inlet port and a first outlet port, for introducing and removing a first fluid, respectively, the first inlet port and the first outlet port being in fluid communication with boreholes in the first and second tubesheet;ii. a second inlet port and a second outlet port for introducing and removing a second fluid, respectively, the second inlet port and the second outlet port being in fluid communication with a shell side of the hollow fiber membranes; andiii. optionally, a port for removing condensed vapors, in communication with the shell side of hollow fiber membranes,wherein the boreholes are formed radially in at least one of said first and second tubesheet. 2. The apparatus of claim 1 wherein hollow fibers are non-porous and are comprised of polymeric material. 3. The apparatus of claim 1, wherein the flow direction of the second fluid in said hollow fiber cartridge is substantially axial or radial with respect to the flow direction of the first fluid. 4. An aircraft comprising the apparatus of claim 1. 5. The apparatus of claim 1 wherein the hollow fiber membranes are formed from poly (ether ether ketone), polyimide, nylon, polysulfone, polyolefin, polyvinyl polymer, perfluoropolymer, polyester, polycarbonate, polybenzimidolzole, polyphenyleneoxide, polyvinyledenefluoride, polyvinylfluoride, polyvinylchloride or a cellulosic polymer. 6. The apparatus of claim 5, wherein the hollow fibers are porous with a dense non-porous layer formed at one of exterior or interior wall surfaces. 7. The apparatus of claim 6, wherein the dense non-porous layer is formed from a perfluoropolymer. 8. The apparatus of claim 5, wherein hollow fibers further contain a filler. 9. The apparatus of claim 8, wherein the filler is a heat or electrically conducting material. 10. The apparatus of claim 8, wherein the filler is a carbonaceous material. 11. The apparatus of claim 1, wherein the hollow fibers have an external diameter within the range of from about 1 cm to about 100 micron. 12. The apparatus of claim 11, wherein the external diameter is within a range of from about 2 mm to about 500 micron. 13. The apparatus of claim 1 wherein the hollow fiber bundle is formed by arranging hollow fibers around a substantially cylindrical core member. 14. The apparatus of claim 13, wherein the central core member is hollow and has one or more openings formed in a wall thereof to provide a fluid communication conduit for the second fluid to the shell side of the hollow fiber bundle. 15. The apparatus of claim 13 wherein hollow fibers are arranged around said core member by helical winding. 16. The apparatus of claim 15, wherein the fibers are disposed at a wind angle within the range of from about 5° to about 60°. 17. The apparatus of claim 15 wherein the hollow fibers are wound at a lower wind angle in a section of the bundle being encapsulated by the terminal tubesheets, as compared to the wind angle of hollow fibers in a section of the bundle disposed between the terminal tubesheets. 18. The apparatus of claim 1, wherein the distribution of radially formed boreholes is maximized for fluid ingress and egress. 19. The apparatus of claim 18, wherein the radial bore holes are cylindrical, elliptical or oval. 20. The apparatus of claim 19, wherein the radial bore hole cross section decreases from exterior circumference to the interior of the tubesheet. 21. The apparatus of claim 20, wherein the radial borehole is formed at an angle to the surface of the tubesheet. 22. The apparatus of claim 19, wherein the flow direction of the second fluid in said hollow fiber cartridge is substantially co-current or counter-current with respect to the flow direction of the first fluid. 23. A hollow fiber device comprising: a hollow fiber bundle, including a plurality of hollow fibers, a first tubesheet and a second tubesheet encapsulating respective distal ends of the hollow fiber bundle, said tubesheets having boreholes in fluid communication with bores of the hollow fibers, wherein the boreholes are formed radially in at least one of said first and second tubesheet. 24. A process for heat transfer or a heat and mass transfer, the process comprising: a) directing a first gas at a first temperature to radial boreholes formed in a first tubesheet at a first end of a hollow fiber bundle that contains a plurality of hollow fibers, said boreholes being in fluid communication with bores of the hollow fibers;b) removing the first gas through radial boreholes formed in a second tubesheet at a second end of the hollow fiber bundle, the second boreholes being in fluid communication with bores of the hollow fibers;c) directing a second fluid at a second temperature at the shell side of the hollow fiber bundle; andd) removing the second fluid from the shell side of the hollow fiber bundle, wherein the first temperature is different from the second temperature and heat or heat and mass transfer occur through walls of hollow fibers. 25. The process of claim 24, wherein heat and mass transfers between the first and second fluid are conducted simultaneously. 26. The process of claim 24, wherein the process is an air to air heat and water vapor exchange. 27. The process of claim 24, wherein the first and second fluids are liquids. 28. The process of claim 24, wherein the first and second fluids are gases. 29. The process of claim 24, wherein the first fluid is water and the second fluid is air containing water vapor. 30. The process of claim 24, wherein the flow direction of the second fluid in said hollow fiber cartridge is substantially axial or radial with respect to the flow direction of the first fluid. 31. The apparatus of claim 24, wherein the flow direction of the second fluid in said hollow fiber cartridge is substantially co-current or counter-current with respect to the flow direction of the first fluid. 32. The process of claim 24, wherein the first fluid is a liquid and the second fluid is a gas. 33. The process of claim 32, wherein the second fluid contains a condensable vapor, said vapor being removed as condensate. 34. The process of claim 33, wherein the vapor is water vapor. 35. The process of claim 32, wherein the liquid is hydraulic fluid and the gas is air. 36. The process of claim 35, wherein the hydraulic fluid is ethylene glycol or propylene glycol. 37. A heat transfer or a heat and mass transfer apparatus comprising: a) a cartridge including a hollow fiber bundle, comprising a plurality of hollow fibers disposed around a substantially tubular core member, a first tubesheet and a second tubesheet encapsulating respective distal ends of the hollow fiber bundle, said tubesheets having boreholes in fluid communication with bores of the hollow fibers;b) a housing surrounding the cartridge, wherein the housing has: i. a first inlet port and a first outlet port, for introducing and removing a first fluid, respectively, the first inlet port and the first outlet port being in fluid communication with boreholes in the first and second tubesheet;ii. a second inlet port and a second outlet port for introducing and removing a second fluid, respectively, the second inlet port and the second outlet port being in fluid communication with a shell side of the hollow fiber membranes; andiii. optionally, a port for removing condensed vapors, in communication with the shell side of hollow fiber membranes,wherein the boreholes are formed radially in at least one of said first and second tubesheet and at least one borehole is in communication with a fluid port through said tubular core member.