EP4296602B1 - Plattenwärmetauscher und hydraulikanordnung mit solch einem wärmetauscher - Google Patents

Plattenwärmetauscher und hydraulikanordnung mit solch einem wärmetauscher

Info

Publication number
EP4296602B1
EP4296602B1 EP23179759.8A EP23179759A EP4296602B1 EP 4296602 B1 EP4296602 B1 EP 4296602B1 EP 23179759 A EP23179759 A EP 23179759A EP 4296602 B1 EP4296602 B1 EP 4296602B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
fluid
ports
plates
primary
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.)
Active
Application number
EP23179759.8A
Other languages
English (en)
French (fr)
Other versions
EP4296602A1 (de
Inventor
Marco Rapaccioli
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.)
G20 Engineering Srl
Original Assignee
G20 Engineering Srl
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Filing date
Publication date
Application filed by G20 Engineering Srl filed Critical G20 Engineering Srl
Publication of EP4296602A1 publication Critical patent/EP4296602A1/de
Application granted granted Critical
Publication of EP4296602B1 publication Critical patent/EP4296602B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • 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
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers

Definitions

  • the present invention refers to a plate heat exchanger and hydraulic assembly comprising such a heat exchanger.
  • the invention has been developed with particular regard to, but not limited to, a plate heat exchanger for use in a boiler for the instantaneous production of domestic hot water and/or heating, as well as for use in a heat pump.
  • a plate heat exchanger in a gas boiler has the function of transferring heat by conduction from the hot water, heated by the burner, to the sanitary cold water entering the boiler, while keeping the two fluids hydraulically separated.
  • a plate heat exchanger hereinafter also referred to for brevity's sake as a heat exchanger, consists of plates, typically in stainless steel, juxtaposed and welded together to form chambers for water to pass. Each plate is in contact on one side with the hot water, heated by the burner, and on the other side with the sanitary cold water.
  • a heat exchanger is provided with four ports: two are respectively for inlet and outlet of the hot water heated by the burner, called primary circuit water, and the other two ports are for inlet of sanitary cold water and outlet of sanitary hot water, heated by the heat exchanger and ready to be supplied.
  • Figure 4 instead shows the course of the fluid within the secondary circuit 42, in a chamber 38.
  • shoulders 60 and 62 with closed-profile, are provided to separate the primary circuit from the secondary circuit and there is also provided a pair of shoulders 56, 58 with open profile, outlining a U.
  • the U-shaped shoulders 56, 58 are arranged so as to partially embrace the connection holes 64, 66 between adjacent chambers 38 and with the concavity facing outwards, more specifically towards the shoulders 60, 62.
  • the water enters from an inlet hole 66 is conveyed from the U-shaped shoulder 58 towards an end 4 of the heat exchanger, where the shoulder 62 is located.
  • the end 4 of the heat exchanger causes a reversal of the direction of the flow of the fluid, which is directed towards the opposing end 4 of the heat exchanger, where the shoulder 60 is located.
  • the fluid is then conveyed inside the U-shaped concavity of the shoulder 56 and then towards the outlet hole 64.
  • the shoulders 56, 58 may also have a different shape, for example V- or L-shaped. Overall it is sufficient that they direct the flow of the fluid towards an end 4 of the heat exchanger.
  • Each plate has corrugations 70, understood as successions of valleys and ridges, clearly visible in the section of Figure 2 .
  • the corrugations are generally with a herringbone pattern, with opposing direction between the plates 30a and the plates 30b. In this way, two adjacent plates always have opposing corrugations.
  • the corrugations allow to create a series of tunnels, all communicating, for the fluid to pass in the chambers 36, 38. Compared to the use of smooth plates, it has been noted that plates with corrugations result in greater turbulence of the fluid and, therefore, a better heat exchange.
  • the fluids are predominantly countercurrent, i.e. the primary fluid and the secondary fluid are directed in the opposing direction. In this way the temperature difference between primary and secondary fluid is relatively constant, with reduced swings. However, there are short stretches in which the fluids are in phase, near the inlet 66 and outlet 64 holes.
  • the plates are preferably made of steel.
  • each plate is obtained by moulding from a metal sheet.
  • heat exchanger described above has a layout compatible with a standard DIN template.
  • FIG. 5 shows the summer mode operation diagram of a heat pump comprising a heat exchanger 10.
  • the fluid then passes through the four-way valve 90, which is now in a different configuration than it was in summer mode, to convey the fluid towards the compressor 92.
  • the compressor compresses the fluid, bringing it to a higher pressure and, consequently, to a temperature T5', higher than T3' and T4'.
  • the fluid exiting the compressor passes again in the four-way valve 90 and can thus return to the heat exchanger 10 to heat the fluid of the secondary circuit.
  • FIG. 7 shows in detail the hydraulic assembly 100 constituting the secondary circuit.
  • the hydraulic assembly 100 comprises a circulation pump 102, which pushes the fluid that passes through it towards a four-way valve 104.
  • the four-way valve 104 may be configured to send the fluid coming from the pump 102 towards the port 48 or the port 50 of the heat exchanger, of choice.
  • the ports 44 and 46 of the heat exchanger are intended to be connected to a closed primary circuit for a fluid of a heat pump, as described above.

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)

Claims (10)

  1. Wärmetauscher, umfassend eine Vielzahl von Platten (30a, 30b, 32, 34), die aneinander fixiert sind, um erste Kammern (36) und zweite Kammern (38) auszubilden, wobei die ersten Kammern miteinander hydraulisch verbunden sind, um einen Primärkreislauf (40) auszubilden, und die zweiten Kammern (38) miteinander hydraulisch verbunden sind, um einen Sekundärkreislauf (42) auszubilden, der von dem Primärkreislauf hydraulisch getrennt ist, wobei der Wärmetauscher ferner mindestens zwei Öffnungen (44 und 46) für den Einlass und den Auslass eines Fluids aus dem Primärkreislauf und mindestens zwei Öffnungen (48 und 50) für den Auslass und den Einlass eines Fluids aus dem Sekundärkreislauf umfasst, wobei die Öffnungen entlang einer annähernd geraden Linie angeordnet sind, dadurch gekennzeichnet, dass in mindestens einer Kammer (38), die zwischen zwei aneinandergrenzenden Platten (30a, 30b) definiert ist, mindestens ein Ansatz mit einem offenen Profil (56, 58) bereitgestellt ist, der so angeordnet ist, dass er eine Verbindungsbohrung (64, 66) zwischen benachbarten Kammern teilweise umschließt und eine Konkavität aufweist, die nach außen gerichtet ist.
  2. Wärmetauscher nach dem vorhergehenden Anspruch, wobei die Öffnungen (44, 46, 48, 50) alle auf derselben Seite des Wärmetauschers positioniert sind.
  3. Wärmetauscher nach Anspruch 1, wobei die Öffnungen (44, 46, 48, 50) teilweise auf einer ersten Seite des Wärmetauschers und teilweise auf einer gegenüberliegenden Seite positioniert sind.
  4. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei jede Platte eine längliche Form mit zwei langen Seiten (2) und zwei verjüngten Enden (4) aufweist.
  5. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei jede Platte eine längliche Form aufweist, die annähernd polygonal ist, die zwei lange Seiten (2) und mindestens vier kurze Seiten oder zwei lange Seiten und zwei gekrümmte kurze Seiten aufweist.
  6. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die Platten Riffelungen (70) aufweisen.
  7. Wärmetauscher nach einem der vorhergehenden Ansprüche, wobei die Riffelungen aufeinanderfolgende Vertiefungen und Rippen sind, die in einem Fischgrätmuster, mit entgegengesetzter Richtung zwischen benachbarten Platten (30a, 30b), angeordnet sind.
  8. Hydraulische Anordnung, umfassend einen Wärmetauscher nach einem der vorhergehenden Ansprüche, eine Umwälzpumpe (12) zum Umwälzen des Primärfluids und ein Dreiwegeventil, das an dem Einlass des Primärkreislaufs platziert ist.
  9. Hydraulische Anordnung für eine Wärmepumpe, umfassend einen Wärmetauscher (10) nach einem der Ansprüche 1 bis 7, eine Umwälzpumpe (102) zum Pumpen des Sekundärfluids in den Sekundärkreislauf des Wärmetauschers und ein Vierwegeventil (104), das so konfiguriert ist, dass es den Primärstrom und den Sekundärstrom in dem Wärmetauscher im Gegenstrom hält.
  10. Hydraulische Anordnung nach Anspruch 9, wobei das Vierwegeventil zwischen der Umwälzpumpe (102) und dem Wärmetauscher angeordnet ist, damit die Pumpe das Sekundärfluid in dem Wärmetauscher in die eine oder andere Öffnung (48 und 50) für den Einlass eines Fluids aus dem Sekundärkreislauf pumpen kann.
EP23179759.8A 2022-06-24 2023-06-16 Plattenwärmetauscher und hydraulikanordnung mit solch einem wärmetauscher Active EP4296602B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT202200013423 2022-06-24

Publications (2)

Publication Number Publication Date
EP4296602A1 EP4296602A1 (de) 2023-12-27
EP4296602B1 true EP4296602B1 (de) 2025-08-13

Family

ID=83271432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23179759.8A Active EP4296602B1 (de) 2022-06-24 2023-06-16 Plattenwärmetauscher und hydraulikanordnung mit solch einem wärmetauscher

Country Status (1)

Country Link
EP (1) EP4296602B1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005078370A1 (de) * 2004-02-10 2005-08-25 Pewo Energietechnik Gmbh Wärmeübertrager mit beinhalteter messmedienkammer
EP1843116A2 (de) * 2006-04-03 2007-10-10 Behr GmbH & Co. KG Stapelscheibenwärmeübertrager
FR2967248B1 (fr) * 2010-11-10 2015-01-23 Valeo Systemes Thermiques Echangeur de chaleur fluide/fluide
JP5634376B2 (ja) * 2011-10-19 2014-12-03 三菱電機株式会社 プレート熱交換器および給湯機
ES2749507T3 (es) * 2012-06-14 2020-03-20 Alfa Laval Corp Ab Un intercambiador de calor de placas con medios de inyección
EP3411648B1 (de) * 2016-02-03 2025-04-09 Modine Manufacturing Company Batteriekühlender plattenwärmetauscher und plattenanordnung
IT201800003132A1 (it) * 2018-02-28 2019-08-28 Ufi Filters Spa Assieme di regolazione temperatura olio

Also Published As

Publication number Publication date
EP4296602A1 (de) 2023-12-27

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