EP0803694B1 - Use of a countercourrent heat exchanger - Google Patents

Use of a countercourrent heat exchanger Download PDF

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Publication number
EP0803694B1
EP0803694B1 EP97103065A EP97103065A EP0803694B1 EP 0803694 B1 EP0803694 B1 EP 0803694B1 EP 97103065 A EP97103065 A EP 97103065A EP 97103065 A EP97103065 A EP 97103065A EP 0803694 B1 EP0803694 B1 EP 0803694B1
Authority
EP
European Patent Office
Prior art keywords
heat exchanger
deflection
guides
air
air flow
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.)
Expired - Lifetime
Application number
EP97103065A
Other languages
German (de)
French (fr)
Other versions
EP0803694A2 (en
EP0803694A3 (en
Inventor
Günter Klasen
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.)
SKS Stakusit Bautechnik GmbH
Original Assignee
SKS Stakusit Bautechnik GmbH
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 SKS Stakusit Bautechnik GmbH filed Critical SKS Stakusit Bautechnik GmbH
Publication of EP0803694A2 publication Critical patent/EP0803694A2/en
Publication of EP0803694A3 publication Critical patent/EP0803694A3/en
Application granted granted Critical
Publication of EP0803694B1 publication Critical patent/EP0803694B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D9/00Heat-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
    • F28D9/0031Heat-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
    • F28D9/0037Heat-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 conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2250/00Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
    • F28F2250/10Particular pattern of flow of the heat exchange media
    • F28F2250/108Particular pattern of flow of the heat exchange media with combined cross flow and parallel flow

Definitions

  • the invention relates to a counterflow heat exchanger in plate construction with alternating between heat exchanger plates formed deflection guides with transverse to the direction of a Air flow arranged deflection surfaces, the deflection guides as L-shaped guides with longer and shorter L-legs are formed.
  • heat exchangers are preferred in Devices for ventilation of rooms are used, especially in roller shutter units with a roller shutter box and a ventilation unit housed in it. How in the described embodiment, the efficiency often unsatisfactory in terms of heat recovery. This can essentially be attributed to the fact that the mean air flow is different from the surrounding edge flows not in contact with the heat exchanger plates comes and consequently there is no heat exchange. - The invention seeks to remedy this.
  • the invention has for its object a countercurrent heat exchanger in plate construction of the one described at the beginning Embodiment of a suitable use with to deliver optimized efficiency.
  • the invention solves this problem by using a Counterflow heat exchanger in plate construction with between heat exchanger plates alternately formed deflection guides deflection surfaces arranged transversely to the direction of an air flow with formations, beads or the like. Elevations, the deflecting guides as L-shaped guides each with a longer and shorter L-leg are for heat recovery in ventilation and air conditioning Plants in which the air flow along each longer L-legs and for the formation of jams and eddies on the shorter one that forms the deflection surface L-leg is deflected.
  • the invention is based on the knowledge that through a sufficient deflection of the air flow between the heat exchanger plates on the one hand, dynamic pressure can be generated, on the other hand, vortex formation can be achieved from which an improved heat transfer on the heat exchanger plates results. Because now not only the middle come Airflow surrounding edge flows with the heat exchanger plates in contact, but precisely because of the vortex formation also the mean airflow. In fact, in Temperature range from - 20 ° C to + 70 ° C in relation to the Heat transfer achieve an efficiency of 70% and more is. That is an optimal result.
  • the deflection surfaces point to stiffening, but also for increased eddy formation and consequently Improvement of heat exchange formings, beads or Like. surveys.
  • the heat exchanger plates have except for the areas of air inlet and air outlet expediently folded plate edges at a distance with contact surfaces for the formation of a deflection guide in each case on top of the heat exchanger plates.
  • the heat exchanger plates are made of aluminum or another Metal with good heat transfer and are easy to admit a counterflow plate heat exchanger with each other connect.
  • a heat exchanger 1 is of plate construction shown, which is a counterflow heat exchanger for heat recovery in ventilation and air conditioning Investments.
  • This heat exchanger 1 is used primarily for ventilation of rooms and for Installation in a roller shutter box 2.
  • Between the heat exchanger plates 3 are alternating counter air ducts 4 for outside air / supply air and room air / extract air.
  • the Air flow is indicated by arrows.
  • the counter air ducts are for congestion and vortex formation as deflection guides 4 designed so that a straight line undisturbed air flow is prevented. Rather are according to the embodiment, the deflection guides 4 as L-shaped guides formed, the one being shorter L-leg one arranged transverse to the air flow direction Deflection surface 5 forms.
  • the heat exchanger plates 3 have except for the areas of air inlet 6 and air outlet 7 Plate edges 8 folded at a distance with support surfaces 9 for the formation of a deflection guide 4 the next heat exchanger plate resting on and are made of aluminum.

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  • 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)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation By Low-Temperature Treatments (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Abstract

The heat exchanger has a panel construction, and the airflow is guided in ducts between the panels, in directions which alternate between successive ducts. The direction of the airflow is diverted by guides (4), in order to choke the flow and to create turbulence. The guides may have surfaces (5) to deflect the airflow transversely, or through a predetermined angle, and these may have contoured sections with raised parts. The guides may be L-shaped, Z-shaped or may have a meandering path, and may have bent separating edges (8) which act as flanges (9) for successive panels to rest on.

Description

Die Erfindung betrifft einen Gegenstromwärmeaustauscher in Plattenbauweise mit zwischen Wärmetauscherplatten wechselweise gebildeten Umlenkführungen mit quer zur Richtung eines Luftstromes angeordneten Umlenkflächen, wobei die Umlenkführungen als L-förmige Führungen mit jeweils längerem und kürzeren L-Schenkel ausgebildet sind.The invention relates to a counterflow heat exchanger in plate construction with alternating between heat exchanger plates formed deflection guides with transverse to the direction of a Air flow arranged deflection surfaces, the deflection guides as L-shaped guides with longer and shorter L-legs are formed.

Bei einem bekannten Wärmeaustauscher der eingangs beschriebenen Gestaltung wird im Rahmen der dortigen Fig. 6 so vorgegangen, dass der Luftstrom entlang des jeweils kürzeren L-Schenkels geführt und an dem längeren L-Schenkel umgelenkt wird. Diese Vorgehensweise kann unter Aspekten der Wärmerückgewinnung nicht vollständig überzeugen (vgl. GB 2 273 767 A).In a known heat exchanger at the beginning Described design is in the context of FIG. 6th proceeded so that the air flow along each shorter L-leg and on the longer L-leg is redirected. This can be done under aspects the heat recovery is not completely convincing (cf. GB 2 273 767 A).

Bekanntermaßen werden Wärmetauscher bevorzugt in Vorrichtungen zum Be- und Entlüften von Räumen eingesetzt, insbesondere in Rollladenaggregaten mit einem Rollladenkasten und einem darin untergebrachten Lüftungsgerät. Wie bei der beschriebenen Ausführungsform ist der Wirkungsgrad in Bezug auf die Wärmerückgewinnung häufig unbefriedigend. Das lässt sich im Wesentlichen darauf zurückführen, dass der mittlere Luftstrom anders als die umgebenden Randströmungen nicht mit den Wärmetauscherplatten in Berührung kommt und folglich insoweit ein Wärmeaustausch unterbleibt. - Hier will die Erfindung Abhilfe schaffen. As is known, heat exchangers are preferred in Devices for ventilation of rooms are used, especially in roller shutter units with a roller shutter box and a ventilation unit housed in it. How in the described embodiment, the efficiency often unsatisfactory in terms of heat recovery. This can essentially be attributed to the fact that the mean air flow is different from the surrounding edge flows not in contact with the heat exchanger plates comes and consequently there is no heat exchange. - The invention seeks to remedy this.

Der Erfindung liegt die Aufgabe zugrunde, einen Gegenstromwärmeaustauscher in Plattenbauweise der eingangs beschriebenen Ausführungsform einer gleigneten Verwendung mit optimierten Wirkungsgrad zuzuführen.The invention has for its object a countercurrent heat exchanger in plate construction of the one described at the beginning Embodiment of a suitable use with to deliver optimized efficiency.

Diese Aufgabe löst die Erfindung durch die Verwendung eines Gegenstromwärmeaustauschers in Plattenbauweise mit zwischen Wärmetauscherplatten wechselweise gebildeten Umlenkführungen mit quer zur Richtung eines Luftstromes angeordneten Umlenkflächen mit Ausformungen, Sicken od. dgl. Erhebungen, wobei die Umlenkführungen als L-förmige Führungen mit jeweils längerem und kürzeren L-Schenkel ausgebildet sind, für die Wärmerückgewinnung bei raumlufttechnischen Anlagen, in denen der Luftstrom entlang des jeweils längeren L-Schenkels geführt und zur Stau- und Wirbelbildung an dem die Umlenkfläche bildenden kürzeren L-Schenkel umgelenkt wird.The invention solves this problem by using a Counterflow heat exchanger in plate construction with between heat exchanger plates alternately formed deflection guides deflection surfaces arranged transversely to the direction of an air flow with formations, beads or the like. Elevations, the deflecting guides as L-shaped guides each with a longer and shorter L-leg are for heat recovery in ventilation and air conditioning Plants in which the air flow along each longer L-legs and for the formation of jams and eddies on the shorter one that forms the deflection surface L-leg is deflected.

Die Erfindung geht von der Erkenntnis aus, dass durch eine hinreichende Umlenkung des Luftstromes zwischen den Wärmetauscherplatten einerseits Staudruck erzeugt werden kann, sich andererseits Wirbelbildung erreichen lässt, aus der ein verbesserter Wärmeübergang an den Wärmetauscherplatten resultiert. Denn nunmehr kommen nicht nur die den mittleren Luftstrom umgebenden Randströmungen mit den Wärmetauscherplatten in Berührung, sondern eben wegen der Wirbelbildung auch der mittlere Luftstrom. Tatsächlich lässt sich im Temperaturbereich von - 20 °C bis + 70 °C in Bezug auf den Wärmeübergang ein Wirkungsgrad erreichen, der 70 % und mehr beträgt. Das ist ein optimales Ergebnis. The invention is based on the knowledge that through a sufficient deflection of the air flow between the heat exchanger plates on the one hand, dynamic pressure can be generated, on the other hand, vortex formation can be achieved from which an improved heat transfer on the heat exchanger plates results. Because now not only the middle come Airflow surrounding edge flows with the heat exchanger plates in contact, but precisely because of the vortex formation also the mean airflow. In fact, in Temperature range from - 20 ° C to + 70 ° C in relation to the Heat transfer achieve an efficiency of 70% and more is. That is an optimal result.

Weitere vorteilhafte Ausgestaltungen werden im Folgenden beschrieben. Die Umlenkflächen weisen zur Versteifung, aber auch zur erhöhten Wirbelbildung und folglich Verbesserung des Wärmeaustausches Ausformungen, Sicken oder dgl. Erhebungen auf. Die Wärmetauscherplatten weisen bis auf die Bereiche von Lufteintritt und Luftaustritt zweckmäßigerweise auf Distanzhöhe abgekantete Plattenränder mit Auflageflächen für die Unterbildung einer Umlenkführung jeweils aufliegende Wärmetauscherplatten auf. Die Wärmetauscherplatten bestehen aus Aluminium oder einem anderen Metall mit gutem Wärmeübergang und lassen sich unschwer zu einem Gegenstrom-Plattenwärmeaustauscher miteinander verbinden.Further advantageous configurations are described below described. The deflection surfaces point to stiffening, but also for increased eddy formation and consequently Improvement of heat exchange formings, beads or Like. surveys. The heat exchanger plates have except for the areas of air inlet and air outlet expediently folded plate edges at a distance with contact surfaces for the formation of a deflection guide in each case on top of the heat exchanger plates. The heat exchanger plates are made of aluminum or another Metal with good heat transfer and are easy to admit a counterflow plate heat exchanger with each other connect.

Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung näher erläutert.In the following, the invention is based on only one Exemplary embodiment drawing closer explained.

Es zeigen:

Fig. 1
in perspektivischer Darstellung einen erfindungsgemäßen Wärmeaustauscher mit L-förmiger Gegenluftführung und
Fig. 2
in schematischer Darstellung einen Rollladenkasten mit einem darin eingebauten Wärmeaustauscher.
Show it:
Fig. 1
a perspective view of a heat exchanger according to the invention with L-shaped counter air and
Fig. 2
a schematic representation of a roller shutter box with a heat exchanger built therein.

In den Figuren ist ein Wärmeaustauscher 1 in Plattenbauweise dargestellt, bei dem es sich um einen Gegenstromwärmeaustauscher für die Wärmerückgewinnung bei raumlufttechnischen Anlagen handelt. Dieser Wärmeaustauscher 1 dient bevorzugt zum Be- und Entlüften von Räumen und zum Einbau in einen Rollladenkasten 2. Zwischen den Wärmetauscherplatten 3 sind wechselweise Gegenluftführungen 4 für Außenluft/Zuluft und Raumluft/Abluft gebildet. Die Luftführung ist durch Pfeile angedeutet. Die Gegenluftführungen sind zur Stau- und Wirbelbildung als Umlenkführungen 4 ausgebildet, so dass eine geradlinige ungestörte Luftdurchströmung verhindert wird. Vielmehr sind nach dem Ausführungsbeispiel die Umlenkführungen 4 als L-förmige Führungen ausgebildet, wobei der eine kürzere L-Schenkel eine quer zur Luftstromrichtung angeordnete Umlenkfläche 5 bildet. Die Wärmetauscherplatten 3 weisen bis auf die Bereiche von Lufteintritt 6 und Luftaustritt 7 auf Distanzhöhe abgekantete Plattenränder 8 mit Auflageflächen 9 für die unter Bildung einer Umlenkführung 4 jeweils aufliegende nächste Wärmetauscherplatte auf und bestehen aus Aluminium.In the figures, a heat exchanger 1 is of plate construction shown, which is a counterflow heat exchanger for heat recovery in ventilation and air conditioning Investments. This heat exchanger 1 is used primarily for ventilation of rooms and for Installation in a roller shutter box 2. Between the heat exchanger plates 3 are alternating counter air ducts 4 for outside air / supply air and room air / extract air. The Air flow is indicated by arrows. The counter air ducts are for congestion and vortex formation as deflection guides 4 designed so that a straight line undisturbed air flow is prevented. Rather are according to the embodiment, the deflection guides 4 as L-shaped guides formed, the one being shorter L-leg one arranged transverse to the air flow direction Deflection surface 5 forms. The heat exchanger plates 3 have except for the areas of air inlet 6 and air outlet 7 Plate edges 8 folded at a distance with support surfaces 9 for the formation of a deflection guide 4 the next heat exchanger plate resting on and are made of aluminum.

Claims (2)

  1. Use of a counter-current heat exchanger (1) in a plate form of construction comprising deflection guides (4) which are formed alternately between heat exchanger plates (3) and which comprise deflection faces (5) which are disposed transversely to the direction of an air flow and which comprise protuberances, beads, or similar elevations, wherein the deflection guides (4) are formed as L-shaped guides, each of which has a longer and a shorter limb of the L, for the recovery of heat in air-conditioning and ventilation installations, in which the air flow is guided along each longer limb of the L and is deflected at the shorter limb of the L which forms the deflection face, to generate impact and swirl effects.
  2. A use according to claim 1, characterised in that apart from the regions of air inflow (6) and air outflow (7) the heat exchanger plates (3) comprise plate edges (8) which are folded to provide a spacer height and which have support faces (9) for the heat exchanger plate (3) which rests thereon in each case, with the formation of a deflection guide (4).
EP97103065A 1996-04-26 1997-02-26 Use of a countercourrent heat exchanger Expired - Lifetime EP0803694B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29607547U DE29607547U1 (en) 1996-04-26 1996-04-26 Plate-type heat exchanger
DE29607547U 1996-04-26

Publications (3)

Publication Number Publication Date
EP0803694A2 EP0803694A2 (en) 1997-10-29
EP0803694A3 EP0803694A3 (en) 1999-03-03
EP0803694B1 true EP0803694B1 (en) 2002-10-16

Family

ID=8023141

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97103065A Expired - Lifetime EP0803694B1 (en) 1996-04-26 1997-02-26 Use of a countercourrent heat exchanger

Country Status (4)

Country Link
EP (1) EP0803694B1 (en)
AT (1) ATE226308T1 (en)
DE (1) DE29607547U1 (en)
DK (1) DK0803694T3 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19737158A1 (en) * 1997-08-26 1999-03-04 Feustle Gerhard Dipl Ing Fh Highly efficient heat exchanger for use in sensor or time-controlled shock ventilation with heat recovery
FR2814537B1 (en) * 2000-09-25 2005-09-02 Valeo Thermique Moteur Sa HEAT EXCHANGER FOR TWO IMPROVED YIELD FLUIDS

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB527585A (en) * 1938-04-16 1940-10-11 Gyoergy Jendrassik Plate heat exchange apparatus for gas turbines
FR1284416A (en) * 1961-03-21 1962-02-09 Luwa Ag heat exchanger
DE1601216B2 (en) * 1967-11-03 1971-06-16 Linde Ag, 6200 Wiesbaden TIN PANEL FOR PLATE HEAT EXCHANGER WITH A STACK OF SUCH TIN PANELS
SE7903535L (en) * 1979-04-23 1980-10-24 Sigurd Hultgren VERMEVEXLARE
FR2576679A1 (en) * 1985-01-25 1986-08-01 Rech Const Electro Et Heat exchanger, particularly for sealed vessels
GB8506415D0 (en) * 1985-03-12 1985-04-11 Atkin H S Room ventilator
DE4142177C2 (en) * 1991-12-20 1994-04-28 Balcke Duerr Ag Plate heat exchanger
CZ278199B6 (en) * 1992-08-28 1993-09-15 Rekuper Moravec Miroslav Asymmetrical recuperative heat-exchange apparatus
GB2273767B (en) * 1992-12-24 1997-06-25 Michael David Rose Improvements in or relating to air ventilating units

Also Published As

Publication number Publication date
ATE226308T1 (en) 2002-11-15
DE29607547U1 (en) 1996-07-18
EP0803694A2 (en) 1997-10-29
DK0803694T3 (en) 2003-02-17
EP0803694A3 (en) 1999-03-03

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