A keel cooler assembly comprising a liquid coolant tube including a plurality of turbulence enhancers for improving the heat transfer of the liquid coolant without substantially increasing pressure drop of the liquid coolant. In one embodiment, the turbulence enhancers generate turbulent wakes in th
A keel cooler assembly comprising a liquid coolant tube including a plurality of turbulence enhancers for improving the heat transfer of the liquid coolant without substantially increasing pressure drop of the liquid coolant. In one embodiment, the turbulence enhancers generate turbulent wakes in the liquid coolant for disrupting laminar boundary layers for improving heat transfer. In another embodiment, the turbulence enhancers generate and propagate turbulent vortexes in the liquid coolant to enhance mixing of the bulk liquid coolant for improving heat transfer. In other embodiments, turbulators, including inserts or impediments, are provided having various configurations and being arranged in predetermined patterns for enhancing turbulence of the liquid coolant for improving keel cooler heat transfer efficiency without substantially increasing pressure drop.
대표청구항▼
1. A keel cooler assembly for use on a marine vessel, said keel cooler assembly exchanging heat with an internal liquid coolant flowing through the keel cooler assembly, said keel cooler assembly comprising: a header comprising an upper wall, an end wall, a bottom wall, opposing sidewalls, and an in
1. A keel cooler assembly for use on a marine vessel, said keel cooler assembly exchanging heat with an internal liquid coolant flowing through the keel cooler assembly, said keel cooler assembly comprising: a header comprising an upper wall, an end wall, a bottom wall, opposing sidewalls, and an inclined surface operatively connecting said upper wall, said bottom wall and said opposing sidewalls;at least one liquid coolant tube extending in a longitudinal direction from said header, said at least one liquid coolant tube comprising: at least one inlet for ingress of the liquid coolant;at least one outlet for egress of the liquid coolant;an elongated body portion extending between said at least one inlet and said at least one outlet, said elongated body portion including an interior surface forming an internal channel for allowing flow of the liquid coolant in a longitudinal direction along a length of said elongated body portion, said elongated body portion being configured as a rectangular parallelepiped comprising opposing upper and lower walls, and opposing first and second sidewalls transverse to said opposing upper and lower walls, said first and second sidewalls operatively connecting said upper and lower walls for forming said internal channel, wherein said elongated body portion includes at least one open end portion being received by at least one spacing in said inclined surface of said header, said at least one open end portion having a rectangular cross-sectional configuration defining said at least one inlet;a means for enhancing the turbulence of the liquid coolant flowing through said elongated body portion of said at least one liquid coolant tube for improving heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one coolant tube lacking said means for enhancing turbulence;wherein said means for enhancing turbulence comprises a plurality of turbulence enhancers extending inwardly into said internal channel from at least one of said upper wall, said lower wall, said first side wall and said second side wall, said plurality of turbulence enhancers being arranged in a predetermined pattern;wherein said turbulence enhancers are selected from the group consisting of: inserts attached to and extending inwardly into said internal channel from at least one of said upper wall, said lower wall, said first sidewall and said second sidewall;configurations of at least one of said upper wall, said lower wall, said first sidewall and said second sidewall; andimpediments to liquid coolant flowing through said at least two liquid coolant tubes; andwherein said predetermined pattern comprises a plurality of adjacent longitudinal rows of said turbulence enhancers, said plurality of adjacent longitudinal rows of said turbulence enhancers including a first longitudinal spacing (XL) between respective longitudinally adjacent turbulence enhancers located in the same longitudinal row, and a second transverse spacing (XH) between respective transversely adjacent turbulence enhancers located in adjacent longitudinal rows;wherein adjacent ones of said longitudinal rows being offset from each other. 2. The keel cooler assembly of claim 1 wherein said respective longitudinal rows of turbulence enhancers located in the same longitudinal row of turbulence enhancers are transversely offset in an alternating staggered configuration from said turbulence enhancers in each adjacent row of turbulence enhancers. 3. The keel cooler assembly of claim 2 wherein a spacing ratio (β) of said first longitudinal spacing (XL) to said second transverse spacing (XH) is greater than about 3.5 for generating and propagating turbulent vortexes in the coolant for enhancing coolant mixing and improving heat transfer without substantially increasing pressure drop of the coolant. 4. The keel cooler assembly of claim 2 wherein a spacing ratio (β) of said first longitudinal spacing (XL) to said second transverse spacing (XH) is in the range between about 1.0 and 7.0 for generating turbulent wakes in the coolant for enhancing eddying motion and improving heat transfer without substantially increasing pressure drop of the coolant. 5. A keel cooler assembly for use on a marine vessel, said keel cooler assembly exchanging heat with an internal liquid coolant flowing through the keel cooler assembly, said keel cooler assembly comprising: a header;at least one liquid coolant tube extending in a longitudinal direction from said header, said coolant tube comprising; an elongated body portion comprising an interior surface forming an internal channel for allowing flow of the liquid coolant in a longitudinal direction along a length of said elongated body portion; anda plurality of turbulators extending inwardly into said internal channel from said elongated body portion interior surface and being configured to interact with the liquid coolant for enhancing the turbulence of the liquid coolant for improving heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators, said plurality of turbulators being located in longitudinal rows with adjacent rows being offset from each other;wherein said at least one liquid coolant tube is configured as a rectangular parallelepiped, said at least one liquid coolant tube comprising opposing upper and lower walls, and opposing first and second sidewalls transverse to said opposing upper and lower walls, said first and second sidewalls operatively connecting said upper and lower walls for forming said internal channel;wherein each of said plurality of turbulators comprises an elongated body portion extending between at least one of (i) said opposing first and second sidewalls and (ii) said opposing upper and lower walls, said respective turbulator elongated body portions having opposing end portions being operatively connected to each of said respective opposing walls;wherein said respective turbulator elongated body portions are configured as at least one of: a solid cylinder having a round cross section for enhancing the turbulence of the liquid coolant for improving heat transfer without substantially increasing pressure drop above an identical at least one liquid coolant tube lacking said turbulators;a hollow cylinder having a round cross section for enhancing turbulence of the liquid coolant without substantially increasing pressure drop above an identical at least one liquid coolant tube lacking said turbulators, said hollow cylinder having round openings on said opposing end portions with an interior channel formed therebetween for allowing flow of ambient liquid through said turbulator interior channel for increasing heat transfer of the liquid coolant flowing through said liquid coolant tube and around said turbulator elongated body portion; anda solid bar having a wing-shaped cross section for directing turbulent wakes of the liquid coolant in a predetermined direction for enhancing the turbulence of the liquid coolant increasing heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators. 6. A keel cooler assembly for use on a marine vessel, said keel cooler assembly exchanging heat with an internal liquid coolant flowing through the keel cooler assembly, said keel cooler assembly comprising: a header;at least one liquid coolant tube extending in a longitudinal direction from said header, said liquid coolant tube comprising; an elongated body portion comprising an interior surface forming an internal channel for allowing flow of the liquid coolant in a longitudinal direction along a length of said elongated body portion; anda plurality of turbulators extending inwardly into said internal channel from said elongated body portion interior surface and being configured to interact with the liquid coolant for enhancing the turbulence of the liquid coolant for improving heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators;wherein said at least one liquid coolant tube is configured as a rectangular parallelepiped, said at least one liquid coolant tube comprising opposing upper and lower walls, and opposing first and second sidewalls transverse to said opposing upper and lower walls, said first and second sidewalls operatively connecting said upper and lower walls for forming said internal channel;wherein said plurality of turbulators are arranged in a predetermined pattern, said predetermined pattern comprising a plurality of adjacent longitudinal rows of said turbulators, said plurality of adjacent longitudinal rows of said turbulators including a first longitudinal spacing (XL) between respective longitudinally adjacent turbulators located in the same longitudinal row, and a second transverse spacing (XH) between respective transversely adjacent turbulators located in adjacent longitudinal rows, adjacent ones of said longitudinal rows being offset from each other. 7. The keel cooler assembly of claim 6 wherein said respective longitudinally adjacent turbulators located in the same longitudinal rows are transversely offset in an alternating staggered configuration. 8. The keel cooler assembly of claim 7 wherein a spacing ratio (β) of said first longitudinal spacing (XL) to said second transverse spacing (XH) is in the range between about 1.0 and 7.0 for generating turbulent wakes in the liquid coolant for enhancing eddying motion and improving heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators. 9. The keel cooler assembly of claim 7 wherein a spacing ratio (β) of said first longitudinal spacing (XL) to said second transverse spacing (XH) is greater than about 3.5 for generating and propagating turbulent vortexes in the liquid coolant for enhancing liquid coolant mixing and improving heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators. 10. The keel cooler assembly of claim 9 wherein each of said plurality of turbulators comprises opposing turbulator end portions and an elongated body portion extending between said opposing turbulator end portions, said respective turbulator elongated body portions extending between said opposing first and second sidewalls, said opposing turbulator end portions being operatively connected to each of said respective sidewalls, wherein: said respective turbulator elongated body portions are arranged orthogonally to each of said opposing first and second sidewalls; andwherein said respective turbulator elongated body portions are configured as at least one of the group consisting of: a solid cylinder having a round cross section for enhancing the turbulence of the liquid coolant for improving heat transfer without substantially increasing pressure drop above an identical at least one liquid coolant tube lacking said turbulators;a hollow cylinder having a round cross section, said hollow cylinder having round openings on said opposing end portions with an interior channel formed therebetween for allowing flow of ambient liquid through said turbulator interior channel for increasing heat transfer of the coolant flowing through said liquid coolant tube and for enhancing the turbulence of the turbulent walls without substantially increasing pressure drop of the liquid coolant around said turbulator elongated body portion above an identical at least one coolant tube lacking said turbulators; anda solid bar having a wing-shaped cross section for directing turbulent wakes of the liquid coolant in a predetermined direction for enhancing the turbulence of the turbulent walls increasing heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators. 11. The keel cooler assembly of claim 10 wherein said turbulator elongated body portion being configured as a solid bar having a wing-shaped cross section comprises a leading head portion, an intermediate portion having a concave surface, and a trailing tail portion to collectively form a wing-shaped turbulator; said respective wing-shaped turbulators collectively forming a plurality of turbulators, said plurality of turbulators being arranged in an alternating pattern, wherein said concave surface of respective longitudinally adjacent wing-shaped turbulators in the same longitudinal row face generally opposite directions. 12. The keel cooler assembly of claim 11 wherein said respective wing-shaped turbulators are rotatably arranged in a predetermined pattern for effecting said concave surface to generally face at least one of (i) an upstream bulk liquid coolant flow and (ii) a downstream bulk liquid coolant flow. 13. A liquid coolant tube for use in a keel cooler, said liquid coolant tube exchanging heat with an internal liquid coolant flowing through the liquid coolant tube, said liquid coolant tube extending in a longitudinal direction from a header, the header including an upper wall, an end wall, a bottom wall, opposing sidewalls, and an inclined surface operatively connecting said upper wall, bottom wall and sidewalls, said liquid coolant tube comprising: an elongated body portion comprising: an interior surface forming an internal channel for allowing flow of the liquid coolant in a longitudinal direction along a length of said elongated body portion;opposing upper and lower walls, and opposing first and second sidewalls transverse to said opposing upper and lower walls, said first and second sidewalls operatively connecting said upper and lower walls for forming said internal channel; said elongated body portion having a rectangular cross-sectional configuration; anda plurality of turbulators extending inwardly into said internal channel from said elongated body portion interior surface and being configured to interact with the liquid coolant for enhancing the turbulence of the liquid coolant without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators;wherein each of said plurality of turbulators comprises an elongated body portion extending between at least one of (i) said opposing first and second sidewalls and (ii) said opposing upper and lower walls, said respective turbulator elongated body portions having opposing end portions being operatively connected to each of said respective opposing walls;wherein said plurality of turbulators are arranged in a predetermined pattern, said predetermined pattern comprising a plurality of adjacent longitudinal rows of said turbulators, said plurality of adjacent longitudinal rows of said turbulators including a first longitudinal spacing (XL) between respective longitudinally adjacent turbulators located in the same longitudinal row, and a second transverse spacing (XH) between respective transversely adjacent turbulators located in adjacent longitudinal rows, said adjacent longitudinal rows being offset from each other. 14. The liquid coolant tube of claim 13, wherein said respective longitudinally adjacent turbulators located in the same longitudinal rows are transversely offset in an alternating staggered configuration. 15. The liquid coolant tube of claim 14, wherein said respective turbulator elongated body portions are configured as at least one of: a solid cylinder having a round cross section for enhancing the turbulence of the liquid coolant for improving heat transfer without substantially increasing pressure drop above an identical at least one liquid coolant tube lacking said turbulators;a hollow cylinder having a round cross section, said hollow cylinder having round openings on said opposing end portions with an interior channel formed therebetween for allowing flow of ambient liquid through said turbulator interior channel for increasing heat transfer of the liquid coolant flowing through said liquid coolant tube; anda solid bar having a wing-shaped cross section for directing turbulent wakes of the liquid coolant in a predetermined direction for increasing heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators. 16. The liquid coolant tube of claim 15, wherein a spacing ratio (β) of said first longitudinal spacing (XL) to said second transverse spacing (XH) is in the range between about 1.0 and 7.0 for generating turbulent wakes in the liquid coolant for enhancing eddying motion and improving heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators. 17. The liquid coolant tube of claim 15, wherein a spacing ratio (β) of said first longitudinal spacing (XL) to said second transverse spacing (XH) is greater than about 3.5 for generating and propagating turbulent vortexes in the liquid coolant for enhancing liquid coolant mixing and improving heat transfer without substantially increasing pressure drop of the liquid coolant above an identical at least one liquid coolant tube lacking said turbulators. 18. The liquid coolant tube of claim 15 wherein said turbulator elongated body portion being configured as a solid bar having a wing-shaped cross section comprises a leading head portion, an intermediate portion having a concave surface, and a trailing tail portion to collectively form a wing-shaped turbulator; said wing-shaped turbulator being arranged in an alternating pattern, wherein said concave surface of respective longitudinally adjacent turbulators in the same longitudinal row face generally opposite directions.
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이 특허에 인용된 특허 (27)
Uematsu Hideto,JPX ; Eckelberry Nicholas, Apparatus for generating microbubbles while mixing an additive fluid with a mainstream liquid.
Maurer Rudolf,CHX ; Studlek Joachim,DEX, Module forming part of a static mixer arrangement for a plastically flowable material to be mixed having a critical dwell time.
Lee Ching-Pang (Cincinnati OH) Savage Joseph W. (Maineville OH) Bobo Melvin (Cincinnati OH), Scaled heat transfer surface with protruding ramp surface turbulators.
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