WO2003060413A1 - Ailette d'echange thermique, et son procede de fabrication - Google Patents
Ailette d'echange thermique, et son procede de fabrication Download PDFInfo
- Publication number
- WO2003060413A1 WO2003060413A1 PCT/FR2003/000077 FR0300077W WO03060413A1 WO 2003060413 A1 WO2003060413 A1 WO 2003060413A1 FR 0300077 W FR0300077 W FR 0300077W WO 03060413 A1 WO03060413 A1 WO 03060413A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- wave
- fin
- spacer
- heat exchange
- members
- Prior art date
Links
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
- F28F17/00—Removing ice or water from heat-exchange apparatus
- F28F17/005—Means for draining condensates from heat exchangers, e.g. from evaporators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J3/00—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification
- F25J3/02—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream
- F25J3/04—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air
- F25J3/04406—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system
- F25J3/04412—Processes or apparatus for separating the constituents of gaseous or liquefied gaseous mixtures involving the use of liquefaction or solidification by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream for air using a dual pressure main column system in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J5/00—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants
- F25J5/002—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J5/00—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants
- F25J5/002—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger
- F25J5/005—Arrangements of cold exchangers or cold accumulators in separation or liquefaction plants for continuously recuperating cold, i.e. in a so-called recuperative heat exchanger in a reboiler-condenser, e.g. within a column
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
- F28D9/0068—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements with means for changing flow direction of one heat exchange medium, e.g. using deflecting zones
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
- F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
- F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
- F28F3/027—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements with openings, e.g. louvered corrugated fins; Assemblies of corrugated strips
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2250/00—Details related to the use of reboiler-condensers
- F25J2250/02—Bath type boiler-condenser using thermo-siphon effect, e.g. with natural or forced circulation or pool boiling, i.e. core-in-kettle heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2290/00—Other details not covered by groups F25J2200/00 - F25J2280/00
- F25J2290/32—Details on header or distribution passages of heat exchangers, e.g. of reboiler-condenser or plate heat exchangers
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S165/00—Heat exchange
- Y10S165/913—Condensation
-
- 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
Definitions
- the present invention relates to a thermal exchange spacer-fin intended to be sandwiched between two plates which define a condensation passage of a brazed-plate heat exchanger, of the type comprising a corrugated product, in particular with corrugation at rectangular section, having wave legs which, in the mounted state, define flow channels of a gas to be condensed at least partially, comprising at least one condensed liquid drainage channel on the wave legs, extending along a lateral edge of the wave leg, and deflection members disposed on the wave leg and adapted to divert condensed liquid to this drainage channel.
- the invention applies in particular to vaporizers-condensers.
- Thermosiphon vaporizers-condensers comprise an exchanger body, which is more or less completely immersed in a liquid oxygen bath.
- the exchanger body is constituted by a stack of vertical rectangular plates, spacer waves comprising heat exchange waves, and closure bars, which delimit a plurality of first passages and a plurality of second passages.
- the first passages are condensation passages for a circulating fluid.
- the second passages are vaporization passages for a refrigerant, open upwardly and downwardly and provided with vertical main-direction spacer-wave fins.
- the exchanger body further comprises input and output boxes of circulating fluid which cap rows of inlet and outlet windows opening into the first passages.
- Liquid oxygen enters the second passages from the bottom, is warmed to its bubble point, and is partially vaporized.
- Nitrogen gas enters from the top in the first passages, gives heat to the oxygen circulating in the second passages and is condensed.
- a film of liquid nitrogen settles on the surface of the fin and flows downward.
- the flow is called "dripping film”.
- the resistance to heat transfer, in dripping film condensation is substantially proportional to the thickness of the liquid film. Since the resistance varies in power 1/3 of the flow rate, it increases rapidly at the locations of condensation of nitrogen and thus decreases the heat transfer capacity between the nitrogen gas and the fin.
- the invention aims to provide a heat exchange fin for a condensation passage which has an increased heat exchange capacity.
- the subject of the invention is a thermal exchange spacer fin of the aforementioned type, characterized in that at least one deflection member has a leading edge and / or a trailing edge inclined towards a channel associated.
- the spacer vane according to the invention may comprise one or more of the following characteristics, taken separately or in all their technically possible combinations:
- the angle between the leading edges and the general direction of liquid flow is between 5 ° and 70 °, preferably between 10 ° and 45 °.
- the angle between the trailing edges and the general direction of liquid flow is between 5 ° and 70 °, preferably between 10 ° and 45 °.
- each wave leg is adapted to drain the liquid towards a single lateral edge of the wave leg, and the deflection members of two successive wave legs are adapted to drain the liquid towards two edges opposite sides;
- the deflection members are adapted to drain towards the two lateral edges the condensed liquid on each of the wave legs;
- the spacer fin comprises wave bases and wave peaks
- the deflection members comprise first and second members, the first of which are inclined towards a channel associated with the wave base and the second of which are inclined towards a channel associated with the wave-top;
- the members of two successive wave legs consist solely of first members on one of the two wave legs and only second members on the other of these two wave legs;
- each wave leg comprises a first group of successive first organs and a second group consisting of second successive members, the first and second members each extending over substantially the entire height of the wave legs;
- said first and said second members are symmetrical with respect to the median line of the wave leg; said first members are offset relative to said second members, according to the general direction of liquid flow, in particular by half the distance between two first or two second successive members;
- said first and second members are located opposite one another and on the other side of the center line, in particular by forming a chevron; in the unfolded state of the spacer fin, the deflection members of the wave legs form rows extending parallel to an edge of the spacer fin and perpendicular to the edges of the wave legs, and deflection members of one row are identical;
- the deflection members have a leading edge and a trailing edge, and at least the leading edge and preferably the leading edge and the trailing edge are at all points inclined and directed towards the drainage channel associated;
- the deflection members comprise a slot which is formed in the wave leg
- the deflection members comprise a portion projecting from the surface of the wave leg or recessed with respect to the surface of the wave leg, in particular a stamped part;
- Each gas flow channel has on both side faces consisting of wavelength parts only projecting or on both side faces of the parts only recessed relative to the surfaces of these legs of wave;
- the drainage channel comprises a strip of continuous material of the wave leg adjacent to the deflection members and a continuous material ribbon of the wave-top or of the wave-base adjacent to the wave-leg;
- the general direction of liquid flow is substantially identical to the general flow direction of fluid in the gas flow channels;
- the spacer fin comprises partial shift corrugations, and in that the distances between two successive offsets have a length of at least 3 mm and preferably at least 1 cm;
- the spacer-fin comprises at least two fin parts, each of which has a different drainage capacity, and in that the drainage capacity of a fin part at the following fin part in the direction of general flow of fluid increases.
- the invention also relates to a brazed plate heat exchanger comprising plates which define between them heating and partial or total condensation of generally flat flat, and comprising in each passage of condensation a spacer-spacer of thermal exchange, as well as lateral closure bars, characterized in that at least one heat exchange spacer-fin is a spacer-fin as defined above.
- the heat exchanger may constitute a vaporizer-condenser of an air distillation plant.
- the invention furthermore relates to a method for manufacturing a heat exchange fin as defined above, characterized in that it comprises the following successive steps: - parallel rows of deflection members are maintained in a blank of flat product, in particular sheet metal;
- the flat product is folded plastically, forming corrugations, so that the deflection members of a row are situated on the wave legs.
- the method is characterized in that
- Figure 1 schematically shows part of a double column of air distillation according to the invention
- FIG. 2 is a sectional view of the vaporizer-condenser of this double column, taken in vertical section along the plane ll-ll of Figure 1;
- FIG. 3 is a perspective view of a portion of a heat exchange fin according to the invention
- FIG. 4 is a view of a condenser vaporizer-condensation passage in section along the line IV-IV of FIG. 2;
- Figure 5 is a side view of the leg of the fin of Figure 3;
- Figure 6 is a plan view of a portion of a blank of a fin according to Figures 3 to 5; - Figure 7 is a plan view of a blank of a first variant of a fin according to the invention;
- Figure 8 is a view of a condensation passage of the vaporizer-condenser comprising a fin according to one of Figures 7, 9 or 10;
- FIG. 9 and 10 are views similar to Figure 5 respectively of a second and a third embodiment of the fin according to the invention.
- FIG. 11 is a sectional view of a condensation passage comprising a fin according to a second embodiment of the invention.
- FIG. 1 diagrammatically shows the intermediate part of a double air distillation column 1.
- the shell 2 of the double column common to the medium pressure column 3 and to the low pressure column 4 which is superimposed.
- the rounded upper bottom 5 of the column 3 separates the two columns and retains in the tank of the column 4 a bath of liquid oxygen 6.
- the top nitrogen of the column 3 is condensed by indirect heat exchange with the liquid oxygen in the main vaporizer-condenser 7 of the double column, which is arranged in the tank of the column 4 and is totally immersed in the bath 6.
- the vaporizer-condenser 7 consists of a parallelepipedal heat exchanger body 8, generally made of aluminum or aluminum alloy, and of four nitrogen inlet / outlet boxes of generally semi-cylindrical shape, including two upper inlet boxes 9 and two lower outlet boxes 10.
- the body 8 consists of a stack of a large number of vertical rectangular plates 11, all identical. Between these plates are interposed on the one hand peripheral closure bars 12, on the other hand spacer waves, namely heat exchange waves 13 of vertical main orientation.
- the body 8 is assembled in a single operation by soldering in the oven, and the four boxes 9 and 10 are welded to this body. Between the plates 11 are thus defined a large number of flat passages which are alternately first nitrogen condensation passages and second oxygen vaporization passages 16.
- the first passages 15 are closed all around their periphery by the bars 12, which nevertheless leave free, at each longitudinal end, an upper nitrogen inlet window 17 and a lower nitrogen outlet window 18. liquid.
- Each first passage contains four distribution zones, respectively associated with the four windows 17 and 18. Each of these zones contains a wave 19 distribution of horizontal main orientation.
- the remainder of the first passage 15, which extends over a large majority of its surface, is occupied by a heat exchange wave 13 consisting of a first spacer-spacer 20 of heat exchange. This spacer-fin 20 is sandwiched between two plates 11.
- Each of the two nitrogen inlet boxes 9 cap a horizontal row of windows 17.
- each of the two nitrogen outlet boxes 10 cap a horizontal row of windows 18.
- the second passages 16 are fully open on their upper and lower sides, and they are closed on their two vertical sides, over their entire height, by the closing bars 12. They contain only exchange waves 13 consisting of a second heat exchange fin. These fins may be corrugated sheet with a smooth surface.
- the nitrogen gas coming from the column 3 via lines 22, is introduced into the first passages 15 via the two boxes 9, is distributed over the entire length of the first passages by the upper 19 waves. and condense on the surface of the first heat exchange spacer fins 20.
- the nitrogen gas flows in the vaporizer-condenser 7 in a general direction of circulation V of nitrogen, which in this case is vertical.
- Figure 3 is shown, in perspective view, a portion of a first spacer-spacer 20 of heat exchange.
- This fin 20 comprises a corrugation 24 with a rectangular cross-section, having a wave pitch p 0 and consisting of wave bases 26 and wave vertices 28 connected by wave legs 30.
- Each wave leg 30 has two lateral edges 31 extending along the bases 26 or 28 wave vertices.
- the wave bases 26 and the wave peaks 28 are fixed on their width 10 respectively to two plates 11 by a layer of brazing material 32.
- the wave legs 30 extend between these two plates 11 and have a height h 0 .
- the fin 20 and the plates 11 delimit channels 34 of nitrogen gas flow.
- the height h 0 is between 3 mm and 10 mm and the width l 0 is between 0.5 mm and 5 mm.
- the fin 20 comprises liquid nitrogen drainage means condensed on the surface of the legs 30 of the fin, towards the corners of the fin.
- These drainage means comprise, on the one hand, first drainage channels 36A and 36B and, on the other hand, bodies 38 for diverting liquid condensed towards these channels 36.
- Each of the first drainage channels 36A is formed by the junction of a wave leg 30 with a wave vertex 28, while each of the first channels 36B is formed by the junction of a wave leg 30 with a wave base 28.
- each wave leg 30 comprises a zone 39 of continuous material which extends in the wave leg of the base 26 of the wave or the summit 28 of the wave at the beginning of the wave organ. deviation 38.
- This zone 39 called ribbon, has a width c which is at least 0.2 mm, and is preferably between 0.5 mm and 1 mm (see Figure 5).
- the base 26 and the wave vertex 28 each consist of a web of continuous material, devoid of liquid deflection members 38. As a result, this band forms a ribbon similar to the ribbon 39.
- the first drainage channels 36A, 36B extend along the general direction V of nitrogen circulation.
- Second drainage channels 42A, 42B are formed at the junction locations of the wave legs 30 with the plate 11. These second channels 42A, 42B are substantially identical to the first drainage channels 36A, 36B. However, their width is increased by the thickness of the wave base 26 or the wave peak 28 and the solder material layer 32.
- the liquid deflection members 38 are constituted by a succession of identical quadrilateral, in this case parallelogram-shaped, slits 44A, 44B formed in the wave legs 30.
- the slits 44A are inclined towards the drainage channels 36A, 42A, in the general liquid flow direction L, while the slots 44B are inclined towards the drainage channels 36B, 42B.
- Each slot 44A, 44B thus has two long leading edges 46 and trailing edges 48 and two short trailing edge 50 and trailing edges 52.
- the leading edges meet the trailing edges at attack junction points A and leak F.
- the edges of the slots are slightly rounded at the locations of points A and F.
- the width e of the slot measured in one direction perpendicular to the direction of flow L, is less than 2 mm and is preferably between 0.1 mm and 1 mm.
- the long 46 and short leading edges 50 are inclined with respect to the general direction of liquid flow L, towards the drainage channels 36A, 36B, 42A, 42B, at angles ⁇ , and ⁇ , while the edges of long leak 48 and short 52 are inclined with respect to this direction L along angles Y and ⁇ .
- the angles ⁇ , ⁇ , Y and ⁇ are between 5 ° and 70 ° and preferably between 10 ° and 45 ° measured with respect to the general direction of liquid flow L.
- the inclination ⁇ and ⁇ of the leading edges 46, 50 is chosen as a function of the flow velocity of the liquid and the viscosity of the condensed liquid so that the drops of liquid adhere to the leading edges 46, 50 before being drained at point F by the drainage channels 36A, 36B, 42A, 42B.
- the trailing edges 48, 52 are arranged such that the leakage junction point F between the long leading edge 46 and the short trailing edge 52 is, on the one hand, the point the most downstream of the trailing edge 48, 52 and is, on the other hand, the point of the edge of the slot 44A, 44B closest to the associated drainage channels 36A, 36B, 42A, 42B. With this configuration, the liquid flowing along the leading edge 46, 50 is prevented from being deflected towards the middle of the wave leg 30 from the leakage junction point F.
- the driving junction point A is disposed as close as possible to the wave base 26 or the wave peak 28, and preferably coincides with the latter or the latter.
- the leading edge 46, 50 is at each point inclined in the direction L towards the associated drainage channel 36A, 36B, 42A, 42B.
- the leading edge 46, 50 has a concave or rectilinear shape upwards
- the trailing edge 48, 52 is at each point convex or rectilinear downwards.
- each slot 44A, 44B measured along the direction of the liquid flow L is chosen so as to weaken as little as possible the structure of the fin 20.
- the height h f is for example between 0.5mm and 20 mm and preferably between 5 mm and 15 mm.
- the distance between two successive slots 44A, 44B is named d j .
- This distance df is the distance between the leakage point F of a slot 44A, 44B and the point of attack A of the next slot 44A, 44B.
- This distance f is chosen less than 5 cm and is preferably less than 20 mm.
- Ge ⁇ f is selected so that the surface of the wave leg 30 is just rewired over its height h 0 between two successive slots 44A, 44B.
- the perforation rate i.e., the ratio of the area of the perforations to the total area of the fin, is less than 15%.
- a film 56 of liquid nitrogen is established which flows on the surface of the fin 20.
- the liquid then encounters the leading edge 46, 50 of a slot 44A, 44B and is deflected towards a channel 36A, 36B, 42A, 42B so that a dried zone 54 is established downstream of the slot 44A, 44B. Downstream of this slot 44A, 44B gradually establishes a liquid film 56 by condensation of liquid nitrogen gas which is drained by the next slot 44A, 44B.
- Slots 44A, 44B decrease the thickness of the liquid film on the wavelength 30 and hence the heat transfer resistance. They lead, therefore, to an increase in heat exchange efficiency of the fin.
- liquid flows are established in the drainage channels 36A, 36B, 42A, 42B.
- the free surface of the liquid flow in a drainage channel is in the form of a partial cylinder of radius r.
- the liquid flowing in the drainage channels 36A, 36B, 42A, 42B is prevented from emerging therefrom by the capillary forces acting on the liquid.
- the drainage capacity of the channels is important due to the fact that the radius r of the free surface of the liquid varies in power V of the flow of liquid in the channel concerned.
- Figure 6 is shown a bottom portion of a blank F used for the manufacture of the fin 20.
- the blank F has rows R p of slots 44A and 44B in zones corresponding to the wave legs 30. These rows R P extend perpendicular to the bottom edge B of the blank F.
- the slots also form rows R extending parallel to the lower edge B and perpendicular to the side edges 31 of the wave legs 30.
- the pattern formed by the slots 44A, 44B is identical on all the legs 30 and is reproduced with a frequency p identical to the folding period p p .
- a single punch can be used for manufacturing slots 44A and 44B and this punch is driven synchronously with the blank folding tool.
- Figure 7 is shown a portion of a blank of a first variant of a fin-spacer according to the invention.
- the blank F has on each zone corresponding to a wave leg
- First groups G1 of five successive first slots 44A and second groups G2 of five successive second slots 44B are inclined to one side of the wave leg 30, while the second slots 44B are inclined on the other side thereof.
- the two groups G1 and G2 are spaced from each other by a distance dg of between 0.5 mm and 5 cm.
- Each wave leg 30 has two continuous material ribbons 39 associated with both side edges 31 of the wave leg 30 and adjacent to the base regions 26 or vertex regions 28.
- Each slot 44A, 44B extends between these two ribbons 39.
- the liquid deflection members 38 are formed by a succession of first slots 44A and second slots 44B.
- the first and second slits extend on each leg of wave 30 on either side of a median line M-M thereof.
- This line M-M extends parallel to the direction of liquid flow L, midway between the wave vertex 28 and the wave base 26 of the fin 20.
- the first slits 44A are inclined from the median line MM to the wavelengths 28, while the second slits 44B are inclined towards the wave bases 26.
- the first slits 44A and the second slits 44B have a symmetrical shape in relation to the median line MM.
- each slot 44A, 44B is arranged at a distance d c from the top 28, respectively of the base 26.
- the vane 20 comprises the first drainage channels 36A, 36B on both sides of each leg of wave 30.
- each slot 44A, 44B is disposed on the line MM.
- substantially the entire width of the leg 30 is provided with drainage slots 44A, 44B.
- the liquid is diverted to the apex 28 and base 26 associated with each leg 30, to the channels 36A, 36B and 42A, 42B.
- Each of the first 44A or second 44B slots is offset from the first or second next slot by a distance p f.
- the pattern consisting of the set of two slots 44A, 44B is repeated after a distance p_ m .
- This shift leads to a significant rigidity of the fin 20 along the direction of the wave leg 30.
- Figure 10 is shown a third variant of the fin according to the invention.
- the slots 44 of this fin 20 are substantially chevron-shaped.
- the tip A of the chevron is located on the median line M-M and is directed upstream with respect to the general direction of liquid flow L.
- the two arms 44A, 44B of the chevron have a shape substantially identical to the first 44A and 44B second slots of the first variant of the fin 20.
- the leading edge 46A, 46B of each arm is straight from the point A fluid flow is established on both sides of each wave leg 30 during operation, similar to that of the second variant (FIG 8).
- Each chevron-shaped slot (Fig. 10) is either cut by a corresponding chevron-shaped punch, or by two separate punches each of which corresponds to an arm 44A, 44B of a slot 44. In the latter case, the cutting of the slot 44 is performed in two successive steps.
- Figure 11 a second embodiment of a pallet according to the invention. This view corresponds to the view of Figure 4, but shows only one wave.
- the liquid deflection members 38 consist of stamped portions 60 in the surface of the wave legs 30.
- the parts stamped 60 form on one side of the wave leg a groove 62 and on the other side of the wave leg a rib 64.
- the shape and the geometric configuration of the stamped portions 60 in side view are identical to that of the slots 44A, 44B of the embodiments of the fin described above.
- the drawing depth f e of the embossed part 60 is less than half the wavelength ⁇ 0 , and is, for example, between 0.1 mm and 0.25 mm.
- the heat exchange fin according to the invention can be easily manufactured from a flat product, for example an aluminum sheet.
- the slots 44, 44A, 44B are then made by perforation.
- the stamped portions 60 are formed by stamping before folding the flat product.
- the stamping is performed on one side, so that the grooves 62 are on one side of the blank.
- each channel 34 has on its two lateral faces, constituted by the wave legs 30, either deflection grooves 62 or deflection ribs 64.
- the deflection members 38 are manufactured on a fin of the type "serrated", that is to say having partial shift corrugations.
- the length of the corrugations in the general flow direction of the liquid must be large enough to wet the surface of the leg.
- the length of the corrugation, also called serration length, in the liquid flow direction L must be at least 3 mm and preferably at least 1 cm.
- the fin may also be used in a heat exchanger in which a gaseous mixture circulates in the cooling passages, and wherein a fraction of the mixture is condensed.
- the fin may consist of two or more fin parts arranged one after the other in the general flow direction of liquid.
- the drainage means 36A, 36B, 38 have a different drainage capacity from one vane part to another and that the drainage capacity of a fin part to the part of the following fin, in the direction of drainage fluid flow, increases.
- An example of such a fin is a fin-spacer which comprises a first fin portion provided with channel 36A, 36B and drainage members 38 and a second fin portion, which is located downstream in the liquid flow direction L and which comprises smooth wave legs.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/502,123 US7445040B2 (en) | 2002-01-17 | 2003-01-10 | Heat exchange fin and the production method thereof |
JP2003560461A JP4409293B2 (ja) | 2002-01-17 | 2003-01-10 | 熱交換フィンおよびそれの製造方法 |
DE60303197T DE60303197T2 (de) | 2002-01-17 | 2003-01-10 | Wärmeaustauschrippe und herstellungsverfahren dafür |
EP03715008A EP1468238B1 (fr) | 2002-01-17 | 2003-01-10 | Ailette d echange thermique, et son procede de fabrication |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR02/00542 | 2002-01-17 | ||
FR0200542A FR2834783B1 (fr) | 2002-01-17 | 2002-01-17 | Ailette d'echange thermique, son procede de fabrication et echangeur de chaleur correspondant |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003060413A1 true WO2003060413A1 (fr) | 2003-07-24 |
Family
ID=8871326
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2003/000077 WO2003060413A1 (fr) | 2002-01-17 | 2003-01-10 | Ailette d'echange thermique, et son procede de fabrication |
Country Status (8)
Country | Link |
---|---|
US (1) | US7445040B2 (fr) |
EP (1) | EP1468238B1 (fr) |
JP (1) | JP4409293B2 (fr) |
CN (1) | CN1321313C (fr) |
AT (1) | ATE315770T1 (fr) |
DE (1) | DE60303197T2 (fr) |
FR (1) | FR2834783B1 (fr) |
WO (1) | WO2003060413A1 (fr) |
Cited By (2)
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WO2016166473A1 (fr) * | 2015-04-16 | 2016-10-20 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Échangeur de chaleur présentant des éléments de microstructure et unité de séparation comprenant un tel échangeur de chaleur |
FR3075337A1 (fr) * | 2017-12-19 | 2019-06-21 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Element intercalaire a texturation de surface, echangeur de chaleur comprenant un tel element |
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FR2891901B1 (fr) * | 2005-10-06 | 2014-03-14 | Air Liquide | Procede de vaporisation et/ou de condensation dans un echangeur de chaleur |
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FR3075340B1 (fr) * | 2017-12-19 | 2021-04-30 | Air Liquide | Element intercalaire a texturation de surface, echangeur de chaleur et procede de fabrication associes |
US10544997B2 (en) * | 2018-03-16 | 2020-01-28 | Hamilton Sundstrand Corporation | Angled fluid redistribution slot in heat exchanger fin layer |
WO2020033139A1 (fr) * | 2018-08-10 | 2020-02-13 | Modine Manufacturing Company | Plaque de refroidissement de batterie |
US11236953B2 (en) | 2019-11-22 | 2022-02-01 | General Electric Company | Inverted heat exchanger device |
CN111545160A (zh) * | 2020-05-29 | 2020-08-18 | 北京化工大学 | 一种高效填料支撑装置及适用于大塔径的填料支撑装置 |
RU2738749C1 (ru) * | 2020-08-18 | 2020-12-16 | Федеральное государственное бюджетное образовательное учреждение высшего образования. "Юго-Западный государственный университет" (ЮЗГУ) | Многослойный кожухотрубчатый капиллярный конденсатор |
US11940232B2 (en) | 2021-04-06 | 2024-03-26 | General Electric Company | Heat exchangers including partial height fins having at least partially free terminal edges |
US11686537B2 (en) | 2021-04-06 | 2023-06-27 | General Electric Company | Heat exchangers and methods of manufacturing the same |
FR3127561B1 (fr) | 2021-09-27 | 2023-10-27 | Air Liquide | Echangeur comprenant au moins une structure d’échange thermique à surface striée |
CN113941641A (zh) * | 2021-10-15 | 2022-01-18 | 杭州电子科技大学 | 高压高密度板翅式换热器翅片的热冲压成形方法及装置 |
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GB2175990A (en) * | 1985-05-24 | 1986-12-10 | Mitsubishi Electric Corp | Heat exchanger |
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DE3843688A1 (de) * | 1988-12-23 | 1989-11-23 | Bayerische Motoren Werke Ag | Verdampferf einer klimaanlage |
JPH09159313A (ja) * | 1995-12-08 | 1997-06-20 | Fujitsu General Ltd | 熱交換器 |
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FR2804471A1 (fr) * | 2000-01-28 | 2001-08-03 | Behr Gmbh & Co | Refroidisseur d'air de suralimentation, notamment pour vehicules automobiles |
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2002
- 2002-01-17 FR FR0200542A patent/FR2834783B1/fr not_active Expired - Fee Related
-
2003
- 2003-01-10 CN CNB038024292A patent/CN1321313C/zh not_active Expired - Fee Related
- 2003-01-10 JP JP2003560461A patent/JP4409293B2/ja not_active Expired - Fee Related
- 2003-01-10 EP EP03715008A patent/EP1468238B1/fr not_active Expired - Lifetime
- 2003-01-10 DE DE60303197T patent/DE60303197T2/de not_active Expired - Lifetime
- 2003-01-10 AT AT03715008T patent/ATE315770T1/de not_active IP Right Cessation
- 2003-01-10 WO PCT/FR2003/000077 patent/WO2003060413A1/fr active IP Right Grant
- 2003-01-10 US US10/502,123 patent/US7445040B2/en not_active Expired - Fee Related
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GB2199933A (en) * | 1987-01-14 | 1988-07-20 | Marston Palmer Ltd | Surface condensers |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2016166473A1 (fr) * | 2015-04-16 | 2016-10-20 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Échangeur de chaleur présentant des éléments de microstructure et unité de séparation comprenant un tel échangeur de chaleur |
FR3035202A1 (fr) * | 2015-04-16 | 2016-10-21 | Air Liquide | Echangeur de chaleur presentant des elements de microstructure et unite de separation comprenant un tel echangeur de chaleur |
FR3075337A1 (fr) * | 2017-12-19 | 2019-06-21 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Element intercalaire a texturation de surface, echangeur de chaleur comprenant un tel element |
WO2019122663A1 (fr) * | 2017-12-19 | 2019-06-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Element intercalaire a texturation de surface, echangeur de chaleur comprenant un tel element |
Also Published As
Publication number | Publication date |
---|---|
EP1468238A1 (fr) | 2004-10-20 |
FR2834783B1 (fr) | 2004-06-11 |
JP4409293B2 (ja) | 2010-02-03 |
US20050121181A1 (en) | 2005-06-09 |
JP2005515392A (ja) | 2005-05-26 |
ATE315770T1 (de) | 2006-02-15 |
FR2834783A1 (fr) | 2003-07-18 |
CN1620591A (zh) | 2005-05-25 |
DE60303197D1 (de) | 2006-04-06 |
CN1321313C (zh) | 2007-06-13 |
EP1468238B1 (fr) | 2006-01-11 |
DE60303197T2 (de) | 2006-11-02 |
US7445040B2 (en) | 2008-11-04 |
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