EP0895051A1 - Distributor for tubular heat exchanger of two-phase refrigerant cooling apparatus - Google Patents

Distributor for tubular heat exchanger of two-phase refrigerant cooling apparatus Download PDF

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Publication number
EP0895051A1
EP0895051A1 EP98420128A EP98420128A EP0895051A1 EP 0895051 A1 EP0895051 A1 EP 0895051A1 EP 98420128 A EP98420128 A EP 98420128A EP 98420128 A EP98420128 A EP 98420128A EP 0895051 A1 EP0895051 A1 EP 0895051A1
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EP
European Patent Office
Prior art keywords
distributor
central part
cap
phase refrigerant
heat exchanger
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.)
Granted
Application number
EP98420128A
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German (de)
French (fr)
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EP0895051B1 (en
Inventor
André Bailly
Romuald Jurkowski
Mohamed Idriss
Marc Altazin
Slimane Meziani
Jean Michel Navarro
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.)
D APPLIC THERMIQUES C I A T CO
Compagnie Industrielle dApplications Thermiques SA CIAT
Original Assignee
D APPLIC THERMIQUES C I A T CO
Compagnie Industrielle dApplications Thermiques SA CIAT
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Publication of EP0895051A1 publication Critical patent/EP0895051A1/en
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Publication of EP0895051B1 publication Critical patent/EP0895051B1/en
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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/028—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using inserts for modifying the pattern of flow inside the header box, e.g. by using flow restrictors or permeable bodies or blocks with channels
    • 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
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/02—Evaporators
    • F25B39/028—Evaporators having distributing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/026—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits
    • F28F9/0265—Header boxes; End plates with static flow control means, e.g. with means for uniformly distributing heat exchange media into conduits by using guiding means or impingement means inside the header box

Definitions

  • the present invention relates to installations for cooling (refrigeration or air conditioning) in which the liquid to be cooled is treated inside a intratubular type heat exchanger through which a two-phase refrigerant.
  • such an exchanger is presented generally in the form of a closed cylindrical envelope 1 at its ends by two flanges 2 and 3.
  • a transverse partition 4 pierced with holes, the space defined between the flange 3 and this partition 4 being divided by a diametrical wall 5 in two separate rooms, namely an admission room 6 and a delivery chamber 7 to each of which is associated a pipe or tubing 8, respectively 9, connected to a source of pressurized refrigerant.
  • the space 10 between the partition 4 and the flange 2 contains a multitude of heat exchange tubes 11 in shape curls or straight elbow portions with ends are engaged in the holes of the partition 4 of so as to ensure the connection between chambers 6 and 7 for the circulation of the refrigerant.
  • the liquid to be cooled (water or other) is allowed in space 10 of enclosure 1 through an inlet tube 12 and emerges through a tube outlet 13 after being cooled in contact with the tubes curly 11.
  • the distributor according to the invention is mainly remarkable in that it is constituted by a sheet which is shaped like a spherical cap open in direction of the outlet of the intake manifold and which presents a series of perforations arranged around a full central part.
  • figure 1 indicates the structure general of a common intratubular heat exchanger
  • Figure 2 schematically recalls the arrangement of a conventional type two-phase distributor.
  • Figure 3 is an axial section of an intake manifold equipped with a dispenser according to the present invention.
  • Figure 4 shows in the same way a variant of realization of the distributor according to figure 3.
  • Figure 5 is an elevational view of a dispenser established in accordance with the preferred mode of implementation of the invention.
  • Figure 6 is an axial section of the following distributor figure 5.
  • the two-phase distributor shown in FIG. 3 consists of a stamped sheet metal 15 so as to be in the form of a spherical cap.
  • the central part 15 a is provided full while the peripheral zone is pierced with a series of perforations 15 b , advantageously arranged in concentric rows, the number of which varies according to the diameter of the sheet or part 15.
  • This part 15 is fixed in any suitable manner (welding for example) by its edge against the inner wall of the flange 3 of the exchanger, so as to be oriented along the axis of the outlet of the intake manifold 8 in the chamber 6 of said exchanger.
  • the two-phase refrigerant which travels under pressure this pipe 8 is forced to pass through the perforations 15b .
  • the turbulence generated by the impact of this fluid against the solid central part 15 a and by the resistance exerted by said perforations in the passage of said fluid ensures the effective mixing of the two phases of the latter, so that under these conditions a efficient homogenization inside the intake chamber 6 which feeds the looped tubes 11.
  • FIG. 4 illustrates a variant in which the whole of the spherical cap, here referenced 16, is pierced with perforations 16 b , the solid central part being obtained using a patch 16 a attached to the inside of said cap along a cord in the axial section of Figure 4.
  • the result obtained is identical to that of the embodiment according to Figure 3, the manufacturing costs being remarkably reduced in one case as in the other.
  • the homogenization of the two-phase refrigerant is appreciably improved when adopting the embodiment illustrated in FIG. 5 and 6.
  • the spherical cap 17 is pierced with perforations 17 b over its entire surface, as in FIG. 4, and the central zone full is obtained by bringing inside said cap 17, no longer a flat piece or patch, but a conical body 17 a , the tip of which is engaged inside the tube 8.
  • the conical body 17 a favors bursting of the refrigerating fluid and its division in the direction of the perforated peripheral zone.
  • the conical profile body 17 a is provided, on its outer surface, with grooves extending parallel to the axis of this body 17 a , that is to say parallel to the direction of flow of the fluid in tubing 8.
  • These grooves extend at least between the base of the cone and the outlet of the fluid intake manifold.

Abstract

Tubular type thermal exchangers forming part of cooling installations using two-phase refrigeration fluid need an efficient distributor which is able to ensure the homogeneity of the refrigerating fluid entering the exchanger. An efficient distributor may be constructed using a sheet of metal (17) which is perforated (17b) over all its area and shaped into a spherical cap. The central part of the cap is obscured by a cone (17a). This cone is located with its base on the central zone of the cap and its apex directed to the incoming liquid.

Description

La présente invention a trait aux installations de refroidissement (réfrigération ou climatisation) dans lesquelles le liquide à refroidir est traité à l'intérieur d'un échangeur thermique de type intratubulaire parcouru par un fluide frigorigène de nature diphasique.The present invention relates to installations for cooling (refrigeration or air conditioning) in which the liquid to be cooled is treated inside a intratubular type heat exchanger through which a two-phase refrigerant.

Ainsi qu'on la très schématiquement indiqué à la figure 1 du dessin annexé aux présentes, un tel échangeur se présente généralement sous la forme d'une enveloppe cylindrique 1 fermée à ses extrémités par deux flasques 2 et 3. Immédiatement en arrière du flasque 3 est prévue une cloison transversale 4 percée de trous, l'espace défini entre le flasque 3 et cette cloison 4 étant divisé par une paroi diamétrale 5 en deux chambres séparées, à savoir une chambre d'admission 6 et une chambre de refoulement 7 à chacun desquelles est associée une canalisation ou tubulure 8, respectivement 9, reliée à une source de fluide frigorifique sous pression.As shown very schematically in Figure 1 of the drawing appended hereto, such an exchanger is presented generally in the form of a closed cylindrical envelope 1 at its ends by two flanges 2 and 3. Immediately in rear of the flange 3 is provided a transverse partition 4 pierced with holes, the space defined between the flange 3 and this partition 4 being divided by a diametrical wall 5 in two separate rooms, namely an admission room 6 and a delivery chamber 7 to each of which is associated a pipe or tubing 8, respectively 9, connected to a source of pressurized refrigerant.

L'espace 10 compris entre la cloison 4 et le flasque 2 renferme une multitude de tubes d'échange thermique 11 en forme de boucles ou de portions rectilignes à coudes dont les extrémités sont engagées dans les trous de la cloison 4 de façon à assurer la liaison entre les chambres 6 et 7 pour la circulation du fluide frigorigène. Le liquide à refroidir (eau ou autre) est admis dans l'espace 10 de l'enceinte 1 à travers une tubulure d'entrée 12 et en ressort à travers une tubulure de sortie 13 après avoir été refroidi au contact des tubes bouclés 11.The space 10 between the partition 4 and the flange 2 contains a multitude of heat exchange tubes 11 in shape curls or straight elbow portions with ends are engaged in the holes of the partition 4 of so as to ensure the connection between chambers 6 and 7 for the circulation of the refrigerant. The liquid to be cooled (water or other) is allowed in space 10 of enclosure 1 through an inlet tube 12 and emerges through a tube outlet 13 after being cooled in contact with the tubes curly 11.

Par suite de la nature diphasique du fluide frigorigène utilisé (le plus souvent du type connu sous la référence R22), il est évidemment nécessaire de prévoir des moyens propres à assurer l'homogénéité du fluide qui emplit la chambre d'admission 6, afin que les différents tubes 11 soient alimentés de façon régulière. Ce résultat est obtenu en pratique en disposant à l'intérieur du débouché de la tubulure 8 un distributeur diphasique schématisé en A, généralement du type de celui qui est représenté en figure 2.Due to the two-phase nature of the refrigerant used (most often of the type known under the reference R22), it is obviously necessary to provide specific means to ensure the homogeneity of the fluid which fills the intake chamber 6, so that the different tubes 11 are supplied with on a regular basis. This is achieved in practice by having inside the outlet of the tubing 8 a distributor biphasic schematized in A, generally of the type of the one is shown in figure 2.

Il s'agit en fait d'une pièce massive 14 qui est obtenue par usinage en présentant :

  • une extrémité cylindrique 14a engagée dans la tubulure 8 et percée axialement d'une ouverture profilée de manière à définir un col de Venturi 14b (qui est parfois remplacé par un diaphragme rapporté) ;
  • une partie centrale conique 14c dont la pointe est tournée vers le col de Venturi 14b ;
  • et une extrémité 14d à profil tronconique ouvert à l'opposé dudit col 14b, cette extrémité étant percée d'une série de canaux divergents 14e.
It is in fact a solid part 14 which is obtained by machining by presenting:
  • a cylindrical end 14 is engaged in the tube 8 and pierced axially by a profiled opening so as to define a venturi throat 14 b (which is sometimes replaced by an attached diaphragm);
  • a conical central part 14 c , the point of which faces the Venturi neck 14 b ;
  • and an end 14 d with a frustoconical profile open opposite said neck 14 b , this end being pierced with a series of divergent channels 14 e .

Un tel distributeur diphasique donne d'excellents résultats, mais son prix de revient est très élevé par suite du travail d'usinage nécessaire à sa réalisation.Such a two-phase distributor gives excellent results, but its cost price is very high due to the machining work necessary for its realization.

C'est à cet inconvénient de coût qu'entend remédier l'invention, sans pour autant abaisser la qualité du résultat obtenu.It is this cost disadvantage that we intend to remedy. the invention, without lowering the quality of the result got.

Le distributeur suivant l'invention est principalement remarquable en ce qu'il est constitué par une tôle qui est profilée à la manière d'une calotte sphérique ouverte en direction du débouché de la tubulure d'admission et qui présente une série de perforations disposées autour d'une partie centrale pleine.The distributor according to the invention is mainly remarkable in that it is constituted by a sheet which is shaped like a spherical cap open in direction of the outlet of the intake manifold and which presents a series of perforations arranged around a full central part.

Les essais ont démontré qu'un tel agencement assurait en fait une homogénéisation du fluide frigorigène diphasique au moins aussi satisfaisante que les distributeurs usuels suivant figure 2, alors que le prix de revient est réduit dans une mesure très importante.Tests have shown that such an arrangement homogenizes the two-phase refrigerant at less as satisfactory as the following usual distributors Figure 2, while the cost price is reduced in a very important measure.

Il s'est par ailleurs avéré que les résultats les plus favorables étaient obtenus en réalisant la partie centrale pleine de la calotte perforée un cône orienté axialement avec la pointe engagée dans la tubulure d'admission de fluide frigorifique.It has also been found that the most favorable were obtained by carrying out the central part full of the perforated cap an axially oriented cone with the tip engaged in the fluid intake manifold refrigerator.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer:The attached drawing, given by way of example, will allow better understand the invention, the characteristics it presents and the advantages it is likely to provide:

Comme indiqué plus haut, figure 1 indique la structure générale d'un échangeur thermique intratubulaire usuel, tandis que figure 2 rappelle schématiquement l'agencement d'un distributeur diphasique de type classique.As indicated above, figure 1 indicates the structure general of a common intratubular heat exchanger, while Figure 2 schematically recalls the arrangement of a conventional type two-phase distributor.

Figure 3 est une coupe axiale d'une tubulure d'admission équipée d'un distributeur suivant la présente invention.Figure 3 is an axial section of an intake manifold equipped with a dispenser according to the present invention.

Figure 4 montre de la même manière une variante de réalisation du distributeur suivant figure 3.Figure 4 shows in the same way a variant of realization of the distributor according to figure 3.

Figure 5 est une vue en élévation d'un distributeur établi conformément au mode de mise en oeuvre préféré de l'invention.Figure 5 is an elevational view of a dispenser established in accordance with the preferred mode of implementation of the invention.

Figure 6 est une coupe axiale du distributeur suivant figure 5.Figure 6 is an axial section of the following distributor figure 5.

Le distributeur diphasique représenté en figure 3 est constitué par une tôle 15 emboutie de façon à se présenter sous la forme d'une calotte sphérique. La partie centrale 15a est prévue pleine tandis que la zone périphérique est percée d'une série de perforations 15b, avantageusement disposées suivant des rangées concentriques dont le nombre varie en fonction du diamètre de la tôle ou pièce 15.The two-phase distributor shown in FIG. 3 consists of a stamped sheet metal 15 so as to be in the form of a spherical cap. The central part 15 a is provided full while the peripheral zone is pierced with a series of perforations 15 b , advantageously arranged in concentric rows, the number of which varies according to the diameter of the sheet or part 15.

Cette pièce 15 est fixée de toute manière appropriée (soudure par exemple) par son bord contre la paroi intérieure du flasque 3 de l'échangeur, de façon à se trouver orientée suivant l'axe du débouché de la tubulure d'admission 8 dans la chambre 6 dudit échangeur. Le fluide frigorigène diphasique qui parcourt sous pression cette canalisation 8 est obligé de traverser les perforations 15b. Les turbulences engendrées par le heurt de ce fluide contre la partie centrale pleine 15a et par la résistance exercée par lesdites perforations au passage dudit fluide assurent le mélange efficace des deux phases de celui-ci, de sorte qu'on obtient dans ces conditions une homogénéisation efficace à l'intérieur de la chambre d'admission 6 qui alimente les tubes bouclés 11.This part 15 is fixed in any suitable manner (welding for example) by its edge against the inner wall of the flange 3 of the exchanger, so as to be oriented along the axis of the outlet of the intake manifold 8 in the chamber 6 of said exchanger. The two-phase refrigerant which travels under pressure this pipe 8 is forced to pass through the perforations 15b . The turbulence generated by the impact of this fluid against the solid central part 15 a and by the resistance exerted by said perforations in the passage of said fluid ensures the effective mixing of the two phases of the latter, so that under these conditions a efficient homogenization inside the intake chamber 6 which feeds the looped tubes 11.

Figure 4 illustre une variante dans laquelle l'ensemble de la calotte sphérique, ici référencée 16, est percé de perforations 16b, la partie centrale pleine étant obtenue à l'aide d'une pastille 16a rapportée à l'intérieur de ladite calotte suivant une corde dans la coupe axiale de figure 4. Le résultat obtenu est identique à celui de la forme de réalisation suivant figure 3, les coûts de fabrications étant remarquablement réduits dans un cas comme dans l'autre.FIG. 4 illustrates a variant in which the whole of the spherical cap, here referenced 16, is pierced with perforations 16 b , the solid central part being obtained using a patch 16 a attached to the inside of said cap along a cord in the axial section of Figure 4. The result obtained is identical to that of the embodiment according to Figure 3, the manufacturing costs being remarkably reduced in one case as in the other.

L'homogénéisation du fluide frigorigène diphasique est sensiblement amélioré lorsqu'on adopte la forme de réalisation illustrée en figure 5 et 6. Ici la calotte sphérique 17 est percée de perforations 17b sur toute sa surface, comme en figure 4, et la zone centrale pleine est obtenue en rapportant à l'intérieur de ladite calotte 17, non plus une pièce ou pastille plane, mais un corps conique 17a dont la pointe se trouve engagée à l'intérieur de la tubulure 8. Le corps conique 17a favorise l'éclatement du fluide frigorifique et sa division en direction de la zone périphérique perforé.The homogenization of the two-phase refrigerant is appreciably improved when adopting the embodiment illustrated in FIG. 5 and 6. Here the spherical cap 17 is pierced with perforations 17 b over its entire surface, as in FIG. 4, and the central zone full is obtained by bringing inside said cap 17, no longer a flat piece or patch, but a conical body 17 a , the tip of which is engaged inside the tube 8. The conical body 17 a favors bursting of the refrigerating fluid and its division in the direction of the perforated peripheral zone.

De manière avantageuse, le corps à profil conique 17a est pourvu, sur sa surface extérieure, de rainures s'étendant parallèlement à l'axe de ce corps 17a, c'est-à-dire parallèlement à la direction d'écoulement du fluide dans la tubulure 8.Advantageously, the conical profile body 17 a is provided, on its outer surface, with grooves extending parallel to the axis of this body 17 a , that is to say parallel to the direction of flow of the fluid in tubing 8.

Ces rainures non représentées permettent l'alimentation de la zone située derrière la base du cône, entre ce dernier et la calotte sphérique 17.These grooves, not shown, allow the supply of the area behind the base of the cone, between the latter and the spherical cap 17.

Ces rainures s'étendent au moins entre la base du cône et le débouché de la tubulure d'admission du fluide.These grooves extend at least between the base of the cone and the outlet of the fluid intake manifold.

Claims (4)

Distributeur destiné à équiper les échangeurs thermiques intratubulaires des installations de refroidissement à fluide frigorigène de nature diphasique, du genre propre à être fixé au niveau du débouché de la tubulure d'admission du fluide à l'intérieur de la chambre (6) qui alimente les tubes d'échange (11), caractérisé en ce qu'il est constitué par une tôle (15, 16, 17) qui est profilée à la manière d'une calotte sphérique ouverte en direction du débouché de la tubulure (8) et qui présente une série de perforations (15b, 16b, 17b) disposées autour d'une partie centrale pleine (15a, 16a, 17a).Distributor intended to equip intratubular heat exchangers with cooling installations with refrigerant of two-phase nature, of the kind suitable for being fixed at the outlet of the fluid intake pipe inside the chamber (6) which supplies the exchange tubes (11), characterized in that it consists of a sheet (15, 16, 17) which is profiled in the manner of a spherical cap open in the direction of the outlet of the tube (8) and which presents a series of perforations (15 b , 16 b , 17 b ) arranged around a solid central part (15 a , 16 a , 17 a ). Dispositif suivant la revendication 1, caractérisé en ce que la partie centrale pleine est définie par une pastille plane (16a) rapportée dans le fond du profil de la calotte sphérique.Device according to Claim 1, characterized in that the solid central part is defined by a planar pad (16 a) fitted in the profile of the bottom of the spherical cap. Distributeur suivant la revendication 1, caractérisé en ce que la partie centrale pleine est définie par un corps (17a) à profil conique dont la pointe est engagée dans la tubulure (8).Dispenser according to Claim 1, characterized in that the solid central part is defined by a body (17a) of conical profile whose tip is engaged in the manifold (8). Distributeur suivant la revendication 3, caractérisé en ce que le corps (17a) à profil conique est pourvu, sur sa surface extérieure, de rainures s'étendant parallèlement à l'axe dudit corps (17a).Dispenser according to Claim 3, characterized in that the body (17a) of conical profile is provided, on its outer surface with grooves extending parallel to the axis of said body (17a).
EP98420128A 1997-07-29 1998-07-21 Distributor for tubular heat exchanger of two-phase refrigerant cooling apparatus Expired - Lifetime EP0895051B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9709920A FR2766914B1 (en) 1997-07-29 1997-07-29 DISTRIBUTOR FOR FITTING INTRATUBULAR HEAT EXCHANGERS OF DIPHASIC-TYPE REFRIGERATION FLUID COOLING PLANTS
FR9709920 1997-07-29

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Publication Number Publication Date
EP0895051A1 true EP0895051A1 (en) 1999-02-03
EP0895051B1 EP0895051B1 (en) 2002-11-27

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US (1) US6059026A (en)
EP (1) EP0895051B1 (en)
JP (1) JPH11132598A (en)
AT (1) ATE228640T1 (en)
DE (1) DE69809652T2 (en)
ES (1) ES2183308T3 (en)
FR (1) FR2766914B1 (en)

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Cited By (18)

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EP1079194A2 (en) * 1999-08-23 2001-02-28 Nippon Shokubai Co., Ltd. Method for preventing plate type heat exchanger from blockage
EP1079194A3 (en) * 1999-08-23 2001-12-12 Nippon Shokubai Co., Ltd. Method for preventing plate type heat exchanger from blockage
US6848501B2 (en) 1999-08-23 2005-02-01 Nippon Shokubai Co., Ltd Method for preventing plate type heat exchanger from blockage
EP2386050A1 (en) * 2009-01-06 2011-11-16 Danfoss Qinbao (hangzhou) Plate Heat Exchanger Com Heat exchanger, heat pump system and air conditioning system
EP2386050A4 (en) * 2009-01-06 2013-01-09 Danfoss Plate Heat Exchanger Hangzhou Co Ltd Heat exchanger, heat pump system and air conditioning system
US8943854B2 (en) 2009-01-06 2015-02-03 Danfoss Qinbao (Hangzhou) Plate Heat Exchanger Company Limited Heat exchanger and air condition system
EP2264384A1 (en) * 2009-06-02 2010-12-22 Johnson Controls Technology Company A refrigerant distribution device for refrigeration system
CN103946650A (en) * 2011-10-07 2014-07-23 特灵国际有限公司 Pressure correcting distributor for heating and cooling systems
US8931509B2 (en) 2011-10-07 2015-01-13 Trane International Inc. Pressure correcting distributor for heating and cooling systems
WO2013052841A1 (en) * 2011-10-07 2013-04-11 Trane International Inc. Pressure correcting distributor for heating and cooling systems
CN103946650B (en) * 2011-10-07 2016-06-29 特灵国际有限公司 For heating the pressure correction allotter with cooling system
CN103090601A (en) * 2011-11-03 2013-05-08 珠海格力电器股份有限公司 Flow divider and air conditioner thereof
CN103090601B (en) * 2011-11-03 2016-03-23 珠海格力电器股份有限公司 Current divider and there is its air-conditioner
CN109539826A (en) * 2018-07-20 2019-03-29 山东大学 A kind of shell-and-tube heat exchanger of fin height variation
CN109539826B (en) * 2018-07-20 2020-04-28 山东大学 Shell-and-tube heat exchanger with variable fin height
CN111412764A (en) * 2018-07-20 2020-07-14 山东大学 Design method of separating device in heat exchange tube for vapor-liquid two-phase flow
CN111412764B (en) * 2018-07-20 2021-09-21 山东大学 Design method of separating device in heat exchange tube for vapor-liquid two-phase flow
CN115371482A (en) * 2022-10-21 2022-11-22 江苏成华能源化工设备有限公司 Flow equalizing device for shell-and-tube heat exchanger

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DE69809652T2 (en) 2003-07-17
ATE228640T1 (en) 2002-12-15
JPH11132598A (en) 1999-05-21
US6059026A (en) 2000-05-09
FR2766914B1 (en) 1999-10-29
EP0895051B1 (en) 2002-11-27
FR2766914A1 (en) 1999-02-05
ES2183308T3 (en) 2003-03-16
DE69809652D1 (en) 2003-01-09

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