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EP0625688A1 - Plattenwärmetauscher - Google Patents

Plattenwärmetauscher Download PDF

Info

Publication number
EP0625688A1
EP0625688A1 EP94420143A EP94420143A EP0625688A1 EP 0625688 A1 EP0625688 A1 EP 0625688A1 EP 94420143 A EP94420143 A EP 94420143A EP 94420143 A EP94420143 A EP 94420143A EP 0625688 A1 EP0625688 A1 EP 0625688A1
Authority
EP
European Patent Office
Prior art keywords
plates
plate
obstacles
channels
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.)
Ceased
Application number
EP94420143A
Other languages
English (en)
French (fr)
Inventor
Joel Ricard
Robert Nicolas
Claude Roussel
Fabrice Chopard
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.)
SGL Technic Inc
Original Assignee
Vicarb SA
SGL Technic Inc
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
Application filed by Vicarb SA, SGL Technic Inc filed Critical Vicarb SA
Publication of EP0625688A1 publication Critical patent/EP0625688A1/de
Ceased legal-status Critical Current

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Images

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
    • 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
    • F28D9/0031—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 paired plates touching each other
    • F28D9/0043—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 paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—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 paired plates touching each other the plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
    • 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
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • 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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/083—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning capable of being taken apart
    • 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
    • F28F3/12—Elements constructed in the shape of a hollow panel, e.g. with channels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2210/00—Heat exchange conduits
    • F28F2210/02—Heat exchange conduits with particular branching, e.g. fractal conduit arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/20—Fastening; Joining with threaded elements
    • F28F2275/205—Fastening; Joining with threaded elements with of tie-rods

Definitions

  • the invention relates to a new type of plate heat exchanger. It also relates to the heat exchange plates allowing the production of such an exchanger.
  • plate and joint exchangers consist of a stack of a determined number of ribbed plates, of the same type, which are clamped between two flanges, in particular by means of tie rods. These plates have openings at their angles which, within the stack thus formed, define pipes, respectively supply and outlet for the heat transfer fluids. Between two consecutive plates is defined by the ribs a circulation network of one of the fluids, for example the hot fluid, which transmits through the two plates the heat to the other cold heat-transfer fluid, which circulates in opposite directions in the two plates immediately consecutive.
  • these heat exchange plates are made of any metallic stampable material, in particular stainless steel, titanium, etc., capable of exhibiting relatively good heat exchange performance for a reduced bulk.
  • the object of the invention is to provide a plate heat exchanger, made of solid graphite, in order to very significantly increase its heat exchange performance, and capable of operating both in horizontal and vertical position.
  • This heat exchanger with plates with parallel circulation and against the current of the heat transfer fluids is constituted by the stacking of a determined number of ribbed plates of the same dimension, clamped against each other between two flanges, said plates called heat exchange having in their angles openings defining within the stack of supply and outlet pipes respectively for the heat transfer fluids.
  • the plates are made of solid machined graphite, previously impregnated with a waterproofing material, and in particular with a resin.
  • the invention consists in using as production material, solid graphite plates, machined in the mass and this, contrary to all the teachings which distance the use of such a material, taking into account its very low mechanical resistance, in particular to the pressures generated within the exchanger, pressures which can easily reach values close to 10.105 to 15.105 Pascals.
  • the solid graphite plates used in the context of the invention resist such pressures, taking into account their particular profile described below.
  • At least one of the two faces of each of the plates has a profile comprising two distribution zones consisting of a plurality of channels extending substantially radially over a sector from two of the openings in the plate, and a heat exchange zone, connecting the two distribution zones, and comprising a plurality of obstacles to the progression of the fluid flowing between two adjacent plates, defining on the one hand a multitude of channels in communication with the channels of the distribution zones, and on the other hand of the support points of said plate on the immediately adjacent plate.
  • the upper surface of each of the obstacles of the heat exchange zones is planar, and the upper surface of each of said obstacles is included in the same plane, plan additionally integrating the upper surface from the side edge of the plate. In this way, it creates a multitude of support points, capable of giving the stacked plates the mechanical strength necessary to withstand the pressures of the heat transfer fluids which pass through the exchanger.
  • the two faces of the same plate can have different profiles, in order to obtain better thermodynamic performance for each of the heat transfer fluids.
  • the plates rest on each other when they are in place at the level of the exchanger, of a part, at the lateral edge but also at each of the obstacles in the heat exchange zone.
  • the obstacles of the heat exchange zones have the shape of an ellipse, flame, "S”, crescent or drop of water, and this, in order to optimize the heat exchange by creating at level of these turbulence obstacles, and further increasing the heat exchange surface.
  • the lateral face of each of the obstacles itself has ribs in order to further increase the heat exchange surface and therefore the very efficiency of this heat exchange.
  • the various obstacles are distributed in a triangular or square mesh.
  • the channels defined by the various obstacles at the level of this heat exchange zone include section variations in order to create zones of fluid acceleration, also capable of optimizing the efficiency of the heat exchange. These fluid acceleration zones are also generated by modifying the depth of the profile of these different channels.
  • Figure 1 is a schematic representation partially in cross section of a heat exchanger according to the invention.
  • Figure 2 is a top view of a heat exchange plate according to the invention.
  • Figure 3 is a cross-sectional view of the plate of Figure 2.
  • FIG. 4 is a more detailed view of part of FIG. 2.
  • Figure 5 is a more detailed representation of a cross section of the plate according to the invention.
  • FIG. 6 is another sectional view of the same kind, produced in a different location from that of FIG. 5.
  • the exchanger shown in Figure 1 is constituted by the stacking of a number of heat exchange plates (4), produced by machining solid graphite plates previously impregnated with resin. In known manner, this resin is intended to seal the pores that graphite comprises.
  • These different plates (4) cut to identical dimensions, are arranged and clamped against each other between two flanges (1) and (2) and maintained in the state by means in particular of tie rods (3). Between each plate is further positioned a seal (13), advantageously made of flexible sheets of graphite or of fluoropolymers such as PTFE (polytetrafluoroethylene), so as to preserve the chemical homogeneity of the assembly. This generates an alternation of two independent circuits for the circulation of fluids, hot and cold respectively.
  • PTFE polytetrafluoroethylene
  • Each of the plates has openings (5, 6, 7 and 8) at its four angles which, when said plates are superimposed, define supply and outlet pipes for the two heat transfer fluids.
  • the two openings (5) and (6) of the plate shown in FIG. 2 correspond respectively to the inlet and the outlet of one of the heat transfer fluids, while the openings (7) and (8 ) are intended for supplying and leaving the second heat transfer fluid at the other face of the plate shown in FIG. 2.
  • the two heat transfer fluids respectively the hot fluid and the cold fluid never come into contact.
  • a seal (13) extending in a groove (12) formed at the periphery of each of the plates.
  • the two openings corresponding to the circuit of the other face are also joined by means of a seal (15), received in a groove (14), located on the periphery. said openings.
  • this seal (15) is advantageously made of flexible sheets of graphite or of fluorinated polymers (such as for example PTFE).
  • At least one of the two faces of said plates is machined in the mass, and this by any known means and in particular, by means of numerically controlled machines managing the action of shaped cutters, in order to define channels and obstacles within this plate, intended respectively to guide and induce the heat exchange between the hot fluid and the plate on the one hand, and between the plate thus heated and the cold fluid on the other go.
  • each of the faces is divided into three zones, respectively two distribution zones bearing the general reference A and a heat exchange zone bearing the general reference B.
  • the distribution zones A are constituted by a plurality of channels (9) extending substantially radially from the opening respectively (5) and (6) and this over only one disc sector. More specifically, the purpose of these channels is to ensure the transfer of the fluid from the inlet opening (5) over the entire width of the plate, then from the width of the plate to the outlet opening (6).
  • the channels (9) have different profiles according to their length and therefore according to their orientation relative to the respective openings (5,6). .
  • the section of the shortest channels is smaller than that of the longer channels, precisely in order to balance the distribution of the fluid at the level of the entire width of the plate.
  • the profile of each of the channels (9) gradually varies from the openings (5,6) towards the heat exchange zone B.
  • the heat exchange zone B of each of the plates consists of a plurality of channels (10), also machined in the mass, and comprises a plurality of obstacles (11), advantageously of elongated shape and distributed in a square mesh or triangular.
  • These obstacles (11) have the shape of an ellipse, flame, "S”, crescent or even drop of water, and are intended on the one hand, to increase the heat exchange surface, but also to create turbulence zones to promote heat exchange between the fluid and the plate.
  • obstacles (11) zones of smaller section are created, in order to generate local accelerations of the fluid which make it possible to intensify the heat exchange, but also to increase the surface of exchange and further strengthen the mechanical strength of the plate.
  • the obstacles (11) have a flat upper surface, thus capable of creating support points with the obstacles materialized on the plate positioned opposite, in complementarity with the support surface formed. by the edges of the plates.
  • this cooperation of the plates together creating two independent networks of circulation of the two fluids, and pressing one on the other through said obstacles and their outer edge.
  • the zones of acceleration of the liquid are also formed by local variations in the machining depth of the channels (10).
  • the obstacles (11) have a uniform lateral surface or, on the contrary, machined so as to present micro-channels, intended once again to increase the heat exchange surface, and hence the efficiency of the heat exchange.
  • FIG. 3 a cross section of the plate on which we observe the plates created by the obstacles (11) and the channels (10). It is thus observed that the plates of said obstacles are located in the same plane as the upper face of the lateral edge of the plate.
  • the profile can be varied within the same face of a plate as a function of the modification or on the contrary of the conservation of the desired phase.
  • This evolving profile therefore makes it possible to adapt, for the sake of optimum efficiency, each exchanger to the type of heat transfer that it is supposed to provide.
  • the support points constituted by the obstacles of two adjacent plates are offset according to a honeycomb structure, so as to oppose an average thickness greater regular between two adjacent channels receiving the same type of fluid, ie cold fluid or hot fluid. This strengthens the mechanical strength of the plates.
  • two adjacent channels in which two different fluids circulate have an offset structure.
  • FIG. 6 a zone with a minimum passage section is shown, that is to say a zone of acceleration of the fluid, intended, as already specified, to intensify the heat exchange.
  • the plates thus produced give the heat exchanger resulting in thermodynamic performance very significantly increased compared to the plate heat exchangers known to date.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP94420143A 1993-05-18 1994-05-17 Plattenwärmetauscher Ceased EP0625688A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9306257 1993-05-18
FR9306257A FR2705445B1 (fr) 1993-05-18 1993-05-18 Echangeur de chaleur à plaques.

Publications (1)

Publication Number Publication Date
EP0625688A1 true EP0625688A1 (de) 1994-11-23

Family

ID=9447442

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94420143A Ceased EP0625688A1 (de) 1993-05-18 1994-05-17 Plattenwärmetauscher

Country Status (3)

Country Link
US (1) US5544703A (de)
EP (1) EP0625688A1 (de)
FR (1) FR2705445B1 (de)

Cited By (7)

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EP1106729A2 (de) * 1999-12-02 2001-06-13 Joma-Polytec Kunststofftechnik GmbH Kreuzstrom-Wärmetauscher für Kondensationswäschetrockner
CN102706201A (zh) * 2012-05-29 2012-10-03 浙江微智源能源技术有限公司 一种换热器的微通道结构
EP2508832A1 (de) * 2011-04-05 2012-10-10 Michael Rehberg Plattenwärmeübertrager aus Kunststoff
CN105547019A (zh) * 2015-12-15 2016-05-04 西安交通大学 一种非均匀分布肋片的高温高压板式换热器
FR3062470A1 (fr) * 2017-01-31 2018-08-03 Valeo Systemes Thermiques Plaque d'echange pour echangeur de chaleur a plaques et echangeur de chaleur a plaques correspondant
CN110319730A (zh) * 2019-07-11 2019-10-11 南通晨光石墨设备有限公司 一种石墨波纹换热板的生产工艺
JPWO2019043802A1 (ja) * 2017-08-29 2020-09-24 株式会社Ｗｅｌｃｏｎ 熱交換器

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US6170568B1 (en) 1997-04-02 2001-01-09 Creare Inc. Radial flow heat exchanger
US6858282B2 (en) * 1999-12-17 2005-02-22 Henkel Corporation Textured graphite sheet infused with a sealant
FR2823995B1 (fr) * 2001-04-25 2008-06-06 Alfa Laval Vicarb Dispositif perfectionne d'echange et/ou de reaction entre fluides
US6467535B1 (en) 2001-08-29 2002-10-22 Visteon Global Technologies, Inc. Extruded microchannel heat exchanger
CN100402966C (zh) * 2003-06-05 2008-07-16 松下环境系统株式会社 热交换器
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DE102004010640A1 (de) * 2004-03-05 2005-09-22 Modine Manufacturing Co., Racine Plattenwärmeübertrager
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US20060231241A1 (en) * 2005-04-18 2006-10-19 Papapanu Steven J Evaporator with aerodynamic first dimples to suppress whistling noise
DE102005034305A1 (de) * 2005-07-22 2007-01-25 Behr Gmbh & Co. Kg Plattenelement für einen Plattenkühler
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KR100877574B1 (ko) * 2006-12-08 2009-01-08 한국원자력연구원 원자력 수소생산용 고온, 고압 및 내식성 공정 열교환기
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US8272430B2 (en) * 2007-07-23 2012-09-25 Tokyo Roki Co., Ltd. Plate laminate type heat exchanger
KR100990309B1 (ko) * 2008-06-03 2010-10-26 한국수력원자력 주식회사 열교환기
US8474516B2 (en) * 2008-08-08 2013-07-02 Mikros Manufacturing, Inc. Heat exchanger having winding micro-channels
US20110226448A1 (en) * 2008-08-08 2011-09-22 Mikros Manufacturing, Inc. Heat exchanger having winding channels
US9557119B2 (en) 2009-05-08 2017-01-31 Arvos Inc. Heat transfer sheet for rotary regenerative heat exchanger
US20110056669A1 (en) * 2009-09-04 2011-03-10 Raytheon Company Heat Transfer Device
JP2011106764A (ja) * 2009-11-19 2011-06-02 Mitsubishi Electric Corp プレート式熱交換器及びヒートポンプ装置
US9644899B2 (en) * 2011-06-01 2017-05-09 Arvos, Inc. Heating element undulation patterns
CN102706187A (zh) * 2012-05-29 2012-10-03 浙江微智源能源技术有限公司 一种集成式微通道换热器
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US9200853B2 (en) 2012-08-23 2015-12-01 Arvos Technology Limited Heat transfer assembly for rotary regenerative preheater
WO2014061105A1 (ja) * 2012-10-16 2014-04-24 三菱電機株式会社 プレート式熱交換器及びこのプレート式熱交換器を備えた冷凍サイクル装置
DE102012222019A1 (de) * 2012-11-30 2014-06-05 Sgl Carbon Se Plattenwärmeaustauscher in abgedichteter Bauweise
WO2014165088A1 (en) * 2013-03-12 2014-10-09 State Of Oregon Acting By And Through The State Board Of Higher Education On Behalf Of Oregon State University Systems and methods of manufacturing microchannel arrays
US10175006B2 (en) 2013-11-25 2019-01-08 Arvos Ljungstrom Llc Heat transfer elements for a closed channel rotary regenerative air preheater
CN104167399B (zh) * 2014-05-14 2017-09-01 北京工业大学 错位复杂微通道微型换热器
JP2016130625A (ja) * 2015-01-08 2016-07-21 大日本印刷株式会社 熱交換器および熱交換器用金属薄板状プレート
CN105043144A (zh) * 2015-06-12 2015-11-11 西安交通大学 一种双侧蚀刻高温高压印刷电路板换热器
US10094626B2 (en) 2015-10-07 2018-10-09 Arvos Ljungstrom Llc Alternating notch configuration for spacing heat transfer sheets
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EP0206935A1 (de) * 1985-06-25 1986-12-30 Institut Français du Pétrole Lochplattenwärmetauscher mit verbesserter Dichtheit
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1106729A2 (de) * 1999-12-02 2001-06-13 Joma-Polytec Kunststofftechnik GmbH Kreuzstrom-Wärmetauscher für Kondensationswäschetrockner
EP1106729A3 (de) * 1999-12-02 2002-02-13 Joma-Polytec Kunststofftechnik GmbH Kreuzstrom-Wärmetauscher für Kondensationswäschetrockner
EP2508832A1 (de) * 2011-04-05 2012-10-10 Michael Rehberg Plattenwärmeübertrager aus Kunststoff
CN102706201A (zh) * 2012-05-29 2012-10-03 浙江微智源能源技术有限公司 一种换热器的微通道结构
CN105547019A (zh) * 2015-12-15 2016-05-04 西安交通大学 一种非均匀分布肋片的高温高压板式换热器
FR3062470A1 (fr) * 2017-01-31 2018-08-03 Valeo Systemes Thermiques Plaque d'echange pour echangeur de chaleur a plaques et echangeur de chaleur a plaques correspondant
WO2018142065A1 (fr) * 2017-01-31 2018-08-09 Valeo Systemes Thermiques Plaque d'échange pour échangeur de chaleur à plaques et échangeur de chaleur à plaques correspondant
JPWO2019043802A1 (ja) * 2017-08-29 2020-09-24 株式会社Ｗｅｌｃｏｎ 熱交換器
EP3677866A4 (de) * 2017-08-29 2021-03-17 Welcon Inc. Wärmetauscher
US11384992B2 (en) 2017-08-29 2022-07-12 Welcon Inc. Heat exchanger
CN110319730A (zh) * 2019-07-11 2019-10-11 南通晨光石墨设备有限公司 一种石墨波纹换热板的生产工艺

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FR2705445A1 (fr) 1994-11-25
FR2705445B1 (fr) 1995-07-07

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