초록 ▼

A method for forming a plurality of heat transfer fins on at least an inner surface of a conduit in a heat exchanger, the method comprising: forming a plurality of criss-crossing slots in at least a portion of the inner surface of the conduit, the plurality of slots defining the plurality of heat tr

A method for forming a plurality of heat transfer fins on at least an inner surface of a conduit in a heat exchanger, the method comprising: forming a plurality of criss-crossing slots in at least a portion of the inner surface of the conduit, the plurality of slots defining the plurality of heat transfer fins therebetween.

대표청구항 ▼

A method for forming a plurality of heat transfer fins on at least an inner surface of a conduit in a heat exchanger, the method comprising: forming a plurality of criss-crossing slots in at least a portion of the inner surface of the conduit, the plurality of slots defining the plurality of heat tr

A method for forming a plurality of heat transfer fins on at least an inner surface of a conduit in a heat exchanger, the method comprising: forming a plurality of criss-crossing slots in at least a portion of the inner surface of the conduit, the plurality of slots defining the plurality of heat transfer fins therebetween. ainment shroud; wherein, in use, the axial magnetic bearing stator generates an electromagnetic field to longitudinally align the axial magnetic rotor and rotary shaft in a desired position relative to the heat transfer tube. 7. A scraped-surface heat exchanger according to claim 6, wherein the axial magnetic rotor comprises a magnetic core encased within a stainless steel sheathing. 8. A scraped-surface heat exchanger according to claim 7, wherein the axial magnetic rotor is generally disc-shaped. 9. A scraped-surface heat exchanger according to claim 6, wherein the axial magnetic bearing stator comprises at least one solenoid mounted to the outside of the closed end of the drive head end containment shroud. 10. A scraped-surface heat exchanger according to claim 6, wherein the axial magnetic bearing stator comprises at least four solenoids mounted to the outside of the closed end of the drive head end containment shroud. 11. A scraped-surface heat exchanger according to claim 5, further comprising a radial magnetic bearing system comprising: a radial magnetic rotor coupled to the rotary shaft and contained within the second containment shroud, and a radial magnetic bearing stator mounted outside the second containment shroud; wherein, in use, the radial magnetic bearing stator generates an electromagnetic field to radially align the radial magnetic rotor and rotary shaft in a desired position relative to the heat transfer tube. 12. A scraped-surface heat exchanger according to claim 11, wherein the radial magnetic rotor comprises a generally-cylindrical member having a radial magnetic core encased within a stainless steel casing. 13. A scraped-surface heat exchanger according to claim 11, wherein the radial magnetic bearing stator comprises at least one solenoid. 14. A scraped-surface heat exchanger according to claim 13, wherein the at least one solenoid is circumferentially mounted around the outside of the second containment shroud. 15. A scraped-surface heat exchanger according to claim 11, wherein the radial magnetic bearing stator comprises at least four solenoids. 16. A scraped-surface heat exchanger comprising: an elongated generally cylindrical heat transfer tube having an inlet, an outlet, and a sidewall defining a chamber between the inlet and the outlet; an elongated media tube in surrounding relation to the heat transfer tube; a rotary shaft mounted axially within the heat transfer tube, the rotary shaft having an outer surface and one or more scraper blades extending from the outer surface of the rotary shaft; a drive head end containment shroud mounted at an axial end of the heat transfer tube, the drive head end containment shroud having a closed end, an open end, and a sidewall defining a drive head chamber in open communication with the interior chamber of the heat transfer tube through the open end of the containment shroud; an inner rotatable magnet assembly mounted within the drive head chamber of the drive head end containment shroud and connected to the rotary shaft; an outer rotatable magnet assembly mounted outside the drive head end containment shroud and magnetically coupled to the inner rotatable magnet assembly; and a second containment shroud mounted at an axial end of the heat transfer tube opposite the drive head end containment shroud, the second containment shroud having a closed end, an open end, and a sidewall defining a cavity in open communication with the interior chamber of the heat transfer tube through the open end of the second containment shroud, wherein, in use, rotation of the outer magnet assembly results in rotation of the inner magnet assembly, which results in rotation of the rotary shaft. 17. A scraped-surface heat exchanger according to claim 16, wherein the drive head end containment shroud is mounted on the end of the heat transfer tube proximate the outlet. 18. A scraped-surface heat exchanger according to claim 16, wherein the outer rotatable magne