CN101338987B - Heat transfer pipe for condensation - Google Patents

Heat transfer pipe for condensation Download PDF

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Publication number
CN101338987B
CN101338987B CN2007100435376A CN200710043537A CN101338987B CN 101338987 B CN101338987 B CN 101338987B CN 2007100435376 A CN2007100435376 A CN 2007100435376A CN 200710043537 A CN200710043537 A CN 200710043537A CN 101338987 B CN101338987 B CN 101338987B
Authority
CN
China
Prior art keywords
transfer pipe
fin
heat
wing platform
condensation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
CN2007100435376A
Other languages
Chinese (zh)
Other versions
CN101338987A (en
Inventor
罗忠
曹建英
伍剑
邱亚林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wieland Thermal Solutions Shanghai Co Ltd
Original Assignee
Wolverine Tube Shanghai Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Application filed by Wolverine Tube Shanghai Co Ltd filed Critical Wolverine Tube Shanghai Co Ltd
Priority to CN2007100435376A priority Critical patent/CN101338987B/en
Priority to PCT/US2008/069180 priority patent/WO2009009426A2/en
Priority to US12/167,352 priority patent/US20090008069A1/en
Priority to CA 2692690 priority patent/CA2692690A1/en
Priority to JP2010515273A priority patent/JP2010532855A/en
Publication of CN101338987A publication Critical patent/CN101338987A/en
Application granted granted Critical
Publication of CN101338987B publication Critical patent/CN101338987B/en
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/34—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely
    • F28F1/36—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending obliquely the means being helically wound fins or wire spirals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • F28F1/422—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element with outside means integral with the tubular element and inside means integral with the tubular element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00—Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/18—Arrangements for modifying heat-transfer, e.g. increasing, decreasing by applying coatings, e.g. radiation-absorbing, radiation-reflecting; by surface treatment, e.g. polishing
    • F28F13/185—Heat-exchange surfaces provided with microstructures or with porous coatings
    • F28F13/187—Heat-exchange surfaces provided with microstructures or with porous coatings especially adapted for evaporator surfaces or condenser surfaces, e.g. with nucleation sites
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49364—Tube joined to flat sheet longitudinally, i.e., tube sheet

Abstract

The invention provides a heat transfer pipe used for condensation. Fins which can increase the heat exchange area are pressed on the external surface of the heat transfer pipe. The heat transfer pipe is characterized in that two or more than two layers of fin platforms in composite structure are pressed on the fins; fin slots are arranged between the fin platforms; the fin platforms can be L-shaped, three-step-shaped, V-shaped, Y-shaped or in the shape with one square above and in the middle of the two squares. As the steps on the side walls of the fin platforms or the turning points multipled in number formed based on the slots on the top of the fin platforms through processing play a role in condensation and reinforcement of heat transfer, the heat exchange performance of the condensation side of the heat transfer pipe is improved by 6.5 to 15.0 percent compared with the prior art according to the test results by adopting R134a for condensation.

Description

A kind of condensation heat-transfer pipe
Technical field
The invention belongs to the heat-transfer equipment technical field, be specifically related to a kind of condensation heat-transfer pipe.
Background technology
In Refrigeration ﹠ Air-Conditioning and related industries thereof, water cooled condenser has obtained using widely.They mostly are shell and tube exchanger greatly, this wherein, cold-producing medium is at the out-tubular condensing phase-change heat-exchange, cooling agent (for example water) fluid interchange in pipe.Because of the refrigerant side thermal resistance accounts for major part, need adopt the enhanced heat exchange technology in this side, phase-change heat transfer for condensation, have many specially at the heat-transfer pipes of such technical process: as the heat-transfer pipe that is used for the condensation strengthening surface has U.S. Pat 5996686 and U.S. Pat 5669441, become wing by being machined into tube outer surface, at wing top annular knurl, its cardinal principle is to increase the appearance condensation area, utilize the difference of hackly surface diverse location curvature, promote condensate flow, and, the thickness of wedge angle position condensate film is the thinnest, condensing heat-exchange efficient is also the highest, gets rid of condensate liquid by groove between wing again, can reach the effect of enforcing condensation heat exchange.
General people make this type of heat-transfer pipe, as Fig. 1, Fig. 2, shown in Figure 3, suppress the ring-type fin at the outer surface of heat-transfer pipe, on fin, suppress the wing groove again, form the wing platform, increased heat exchange area so to a certain extent, but still can't further improve heat exchange efficiency.
Summary of the invention
Technical problem to be solved by this invention is, a kind of occasion that is applicable to condenser is provided, but the heat-transfer pipe of enforcing condensation heat exchange property.
In order to address the above problem technical scheme of the present invention is such:
A kind of condensation heat-transfer pipe, outer surface at heat-transfer pipe is suppressed with the fin that increases heat exchange area, it is characterized in that, at the composite construction wing platform that is suppressed with on the described fin more than two-layer and two-layer, the wing interstation has the wing groove, and the axial spacing between described fin is 0.3～0.7mm, fin is thick to be 0.05～0.3mm, the fin height is 0.7～1.5mm, and wing groove height is 0.1～0.5mm, wing groove width 0.1～1mm.
Described wing platform is a L type wing platform.
Described wing platform is a product type wing platform.
Described wing platform is 3 layers of stepped ramp type wing platform.
Described wing platform is a V-type wing platform.
Described wing platform is a Y type wing platform.
Described heat-transfer pipe inner surface has internal thread, and the inner thread head number is 8～50, internal thread height 0.1～0.5mm.
Described fin is the axially parallel fin.
Described fin is a spiral fins.
Beneficial effect, because having " turning point " that quantity is multiplied that be processed to form of step or wing platform top-slitting, wing platform sidewall played the effect that condensation heat transfer is strengthened, according to the result of the test that adopts R134a condensation reality, the present invention compared with prior art, the condensation side heat exchange property has improved 6.5%～15.0%.
Description of drawings
Describe the present invention in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is the circumferential profile of the present invention,
Fig. 2 is the circumferential generalized section of the common finned tube of prior art,
Fig. 3 is a prior art sawtooth condenser pipe form plane,
Fig. 3 a is a common wing platform structural representation in the prior art,
Fig. 4 is an embodiment of the invention 1L type wing platform form plane,
Fig. 4 a is an embodiment 1L type wing platform structural representation,
Fig. 5 is the embodiment of the invention 2 product type wing platform form planes,
Fig. 5 a is embodiment 2 product type wing platform structural representations,
Fig. 6 is 3 three layers of step wing of embodiment of the invention platform form plane,
Fig. 6 a is 3 three layers of stepped ramp type wing of embodiment platform structural representation,
Fig. 7 is an embodiment of the invention 4V type wing platform form plane,
Fig. 7 a is an embodiment 4V type wing platform structural representation,
Fig. 8 is the present invention's Application Example schematic diagram in condenser.
The specific embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
Heat-transfer pipe of the prior art adopts the mode of two-sided strengthened heat transfer, and its structure is shown in Fig. 1, Fig. 2, Fig. 3, Fig. 3 a.Wherein, the outer surface of tube body 1 is along circumferentially being distributed with spiral or parallel fin 2, and the edge circumferentially constitutes groove 3 between wing between the fin 2; Fin 2 tops have wing groove 4, form wing platform 5 between adjacent skewed slot; Heat-transfer pipe 1 inside has internal thread 11.
The embodiment of the invention 1, referring to Fig. 4, Fig. 4 a, on the basis of existing heat-transfer pipe, by processing the compound L of going out type wing platform 6, described L type wing platform 6 comprises upper strata wing platform 61 and bottom wing platform 62, with respect to original wing platform 5 surfaces, increased the area on two surfaces of sidewall, these surfaces all can be used as condensing surface, thereby have increased the area of condensing heat-exchange face.In addition, because the intersection curvature of sidewall and wing platform and winglet platform is infinitely great, theory according to the film condensation heat transfer, these positions (sharp point place) condensing heat-exchange performance obtains maximum reinforcement, the liquid that condensation forms is because the relation of surface tension and surface curvature, confining force at this place is the poorest, very fast drippage or flow to other positions.And, because wing platform surface is to adopt the disk instrument to squeeze out from wing platform 5 sidewalls, thereby do not need to increase the metal consumption of former heat exchanger tube.
Press Fig. 1,2,3, this heat exchanger tube is processed and made to order shown in 4.Tube body 1 can be selected copper and copper alloy material or other metal materials for use, and the heat exchanger tube external diameter is 19mm, and wall thickness is 1.04mm, adopts special-purpose pipe mill and carries out the interior and outer integrated processing simultaneously of pipe of pipe with the mode of extrusion process.Processed along circumferential helical fin 2 on tube body 1 outer surface, axial spacing is 0.627mm, adopts knurling tool to open wing groove 4 on fin 2, and the wing groove depth is 0.3mm, and width 0.3mm is along circumference 150 distributions weekly; Between form wing platform 5, further contract in one side pressure of wing roof panel, can form double L type wing platform, the compound wing platform plane discrepancy in elevation is 0.2mm, one side has increased heat exchange area like this, has increased on the other hand for the favourable sharp borders of condensing heat-exchange.The present invention simultaneously can utilize core print to process internal thread 11 in pipe, and with the coefficient of heat transfer in the enhanced tube, so among the embodiment in 1, the height of internal thread 11 is 0.36mm, is 46 to spend with the angle C of axis, and number of starts is 38.But therefore the thickness in attenuate fluid heat transferring boundary layer can improve convection transfer rate, further increases the overall coefficient of heat transfer.
But the turbulence level of heat convection in the thermoexcell behind the tube body inwall increase internal thread 11, thereby enhanced heat exchange; Particularly adopt outside pipe under the situation of strengthening surface, pipe thermal resistance interior and that pipe is outer is more approaching, to further reinforcement the in managing, can effectively improve whole heat transfer property greatly.
The course of work is as follows: referring to Fig. 8, tube body 1 of the present invention is fixed on the tube sheet 10 of heat exchanger 9 (condenser), in cooling agent (as water) is flowed through the pipe of invention tube body 1 from hydroecium 11 inlet 12, with the outer cold-producing medium heat exchange of pipe, again from hydroecium 11 outlets 13 outflows; Refrigerant gas 15 enters heat exchanger 9 from entering the mouth, and by 1 cooling of heat-transfer pipe main body, and is condensed into liquid at the pipe outer wall, and from exporting 14 outflow heat exchangers, because the condensation of refrigerant heat release, the cooling agent in the pipe of the present invention is heated.Because the outer wall configuration of aforesaid tube body 1 helps strengthening the film condensation heat exchange of cold-producing medium, thereby has effectively improved the condensing heat-exchange coefficient of whole heat exchanger.
The embodiment of the invention 2, referring to Fig. 5, Fig. 5 a, (on Fig. 3 basis a), the both sides of wing platform 5 are further compressed, and form product type wing platform 7, and winglet platform 71 is distributed in flank at wing platform 5.Can further increase the sharp point of condensation area or turnover like this, to improve the condensing heat-exchange coefficient.All the other are with embodiment 1.
The embodiment of the invention 3, referring to Fig. 6, Fig. 6 a, at wing platform 5 (on Fig. 3 basis a), the both sides of wing platform 5 are further compressed, and are compressed into three layers of stepped ramp type wing platform 8, and wing platform 8 both sides have step 81,82 respectively, perhaps at product type wing platform 7 (on Fig. 5 basis a), remainder at wing platform 7 continues to process winglet platform 82, can further increase the sharp point of condensation area or turnover like this, to improve the condensing heat-exchange coefficient.All the other are with embodiment 1.
The embodiment of the invention 4, referring to Fig. 7, Fig. 7 a, (on Fig. 3 basis a), the centre of wing platform 5 is further compressed, and is compressed into V-type wing platform 9, and the middle part of V-type wing platform 9 has V-type groove 91 at wing platform 5.Can further increase the sharp point of condensation area or turnover like this, to improve the condensing heat-exchange coefficient.All the other are with embodiment 1.
The embodiment of the invention 5, (on Fig. 3 basis a), the centre of wing platform 5 is compressed, and is compressed into Y type wing platform 9, and the middle part of V-type wing platform 9 has V-type groove 91 at wing platform 5.Can increase the sharp point of condensation area or turnover like this, to improve the condensing heat-exchange coefficient.All the other are with embodiment 1.
Compared with prior art, because having " turning point " that quantity is multiplied that be processed to form of step or wing platform top-slitting, wing platform sidewall played the effect that condensation heat transfer is strengthened, according to the result of the test that adopts R134a condensation reality, the present invention compared with prior art, the condensation side heat exchange property has improved 6.5%～15.0%.
More than show and described basic principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.

Claims (9)

1. condensation heat-transfer pipe, outer surface at heat-transfer pipe is suppressed with the fin that increases heat exchange area, it is characterized in that, composite construction wing platform being suppressed with on the described fin more than two-layer and two-layer sticks up interstation and has the wing groove, and the axial spacing between described fin is 0.3～0.7mm, fin is thick to be 0.05～0.3mm, the fin height is 0.7～1.5mm, and wing groove height is 0.1～0.5mm, wing groove width 0.1～1mm.
2. a kind of condensation heat-transfer pipe according to claim 1 is characterized in that, described wing platform is a L type wing platform.
3. a kind of condensation heat-transfer pipe according to claim 1 is characterized in that, described wing platform is a product type wing platform.
4. a kind of condensation heat-transfer pipe according to claim 1 is characterized in that, described wing platform is 3 layers of stepped ramp type wing platform.
5. a kind of condensation heat-transfer pipe according to claim 1 is characterized in that, described wing platform is a V-type wing platform.
6. a kind of condensation heat-transfer pipe according to claim 1 is characterized in that, described wing platform is a Y type wing platform.
7. a kind of condensation heat-transfer pipe according to claim 1 is characterized in that described heat-transfer pipe inner surface has internal thread, and the inner thread head number is 8～50, internal thread height 0.1～0.5mm.
8. a kind of condensation heat-transfer pipe according to claim 1 is characterized in that described fin is the axially parallel fin.
9. a kind of condensation heat-transfer pipe according to claim 1 is characterized in that described fin is a spiral fins.
CN2007100435376A 2007-07-06 2007-07-06 Heat transfer pipe for condensation Ceased CN101338987B (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN2007100435376A CN101338987B (en) 2007-07-06 2007-07-06 Heat transfer pipe for condensation
PCT/US2008/069180 WO2009009426A2 (en) 2007-07-06 2008-07-03 Finned tube with stepped peaks
US12/167,352 US20090008069A1 (en) 2007-07-06 2008-07-03 Finned tube with stepped peaks
CA 2692690 CA2692690A1 (en) 2007-07-06 2008-07-03 Finned tube with stepped peaks
JP2010515273A JP2010532855A (en) 2007-07-06 2008-07-03 Finned tube with stepped top

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2007100435376A CN101338987B (en) 2007-07-06 2007-07-06 Heat transfer pipe for condensation

Publications (2)

Publication Number Publication Date
CN101338987A CN101338987A (en) 2009-01-07
CN101338987B true CN101338987B (en) 2011-05-04

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Application Number Title Priority Date Filing Date
CN2007100435376A Ceased CN101338987B (en) 2007-07-06 2007-07-06 Heat transfer pipe for condensation

Country Status (5)

Country Link
US (1) US20090008069A1 (en)
JP (1) JP2010532855A (en)
CN (1) CN101338987B (en)
CA (1) CA2692690A1 (en)
WO (1) WO2009009426A2 (en)

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Also Published As

Publication number Publication date
WO2009009426A3 (en) 2009-03-12
US20090008069A1 (en) 2009-01-08
WO2009009426A2 (en) 2009-01-15
CN101338987A (en) 2009-01-07
JP2010532855A (en) 2010-10-14
CA2692690A1 (en) 2009-01-15

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