+

EP1134534B1 - Sheet for an evaporator made up of sheets - Google Patents

Sheet for an evaporator made up of sheets Download PDF

Info

Publication number
EP1134534B1
EP1134534B1 EP01104843A EP01104843A EP1134534B1 EP 1134534 B1 EP1134534 B1 EP 1134534B1 EP 01104843 A EP01104843 A EP 01104843A EP 01104843 A EP01104843 A EP 01104843A EP 1134534 B1 EP1134534 B1 EP 1134534B1
Authority
EP
European Patent Office
Prior art keywords
media
lamina
area
discharge area
evaporator
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
EP01104843A
Other languages
German (de)
French (fr)
Other versions
EP1134534A1 (en
Inventor
Oliver Freitag
Alois Tischler
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.)
Mercedes Benz Fuel Cell GmbH
Original Assignee
Ballard Power Systems AG
Siemens VDO Electric Drives 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 Ballard Power Systems AG, Siemens VDO Electric Drives Inc filed Critical Ballard Power Systems AG
Publication of EP1134534A1 publication Critical patent/EP1134534A1/en
Application granted granted Critical
Publication of EP1134534B1 publication Critical patent/EP1134534B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F28D9/0093Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
    • 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

Definitions

  • the invention relates to a film for a film constructed, in particular apprised by an organization, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a computerized physician, a film for a film constructed, in particular impressibly, evaporator for Transfer of a liquid mass flow of media in a gaseous media mass flow according to the preamble Of claim 1 further defined type.
  • a similar, in a similar way from slides constructed catchy evaporator is in DE 44 26 692 C1.
  • the described there, two-stage Evaporator unit serves to transfer one in dependence a load specification adjustable liquid reactant mass flow in a gaseous reactant mass flow, wherein the liquid reactant mass flow with the aid of a heat transfer medium in a first Stage at least partially evaporated and in a second Stage if necessary completely evaporated and subsequently overheated.
  • the evaporator unit by alternately stacking of films with heat transfer channels and of Foils with reaction channels is formed, and that in each case at least a first and a second stage in a foil are integrated, the first stage as Channel with minimized cross-sectional area at the itself formed directly adjacent to the inflow line is, and that the first stage at high heat transfer rates is operated, and further that the total cross section the reaction channels in the second stage in Flow direction increases.
  • the vaporized reactant mass flow from each of the Reaction or media foils in a common collection space emerge in the exit area and from there is via an outlet line of the gaseous reactant mass flow derived.
  • collecting space can be a Mixing of the respective reaction films flowing reactant mass flows come, so that the Output a comparatively evenly vaporized Reactant mass flow is present.
  • the object of the invention an ideal and Therefore, even distribution of the vaporized and the evaporated medium, especially in the exit area the films of a built-up of films evaporator to reach.
  • the exit area is heated in the Area of the media sheets arranged so that the exit area about the pure function of a collection room goes out and a mix of over the Width of the respective media sheet exiting gaseous Media shares in the heated exit area can be done.
  • a film pack 1 is one in its entirety Evaporator not shown recognizable.
  • the evaporator is constructed here say butter which means that the evaporator at least two separate Inputs for two media mass flows, accordingly
  • each of the foil packets 1 has a first media sheet 2 and a second media sheet 3.
  • Between the two media slides 2, 3 is here one Intermediate foil 4 is arranged. These three foils 2, 3, 4 are then combined to form the film package 1.
  • the film package 1 On at least two sides of the film package 1 are then more rooms 5 in which a heating medium flows or in which the thermal energy is used to heat the Foil packages 1 in any other way, for example by catalytic combustion or the like, is made available.
  • a heating medium flows or in which the thermal energy is used to heat the Foil packages 1 in any other way, for example by catalytic combustion or the like, is made available.
  • a conceivable one Construction would be, for example, the alternating stacking of foil packets 1 and spaces 5, like this is shown here rudimentary.
  • the first media sheet 2 has one of the evaporation and / or overheating the first media stream serving Evaporation area 6, at which in the Flow direction of the media stream an exit area 7 connects.
  • the evaporation region 6 points Structures, channels, aisles or the like, the not explicitly shown here, as they are in themselves known and for the invention of minor interest are.
  • the exit region 7 of the first media film 2 may, but need not, be free from such Be structures.
  • a comparable structure shows the second media slide 3 which also has an evaporation region 8 and has an output region 9.
  • an opening 10 is arranged in the intermediate foil 4. Through this opening 10 and a recess 11 in the second media film 3 thus results in a strong cross-sectional enlargement in the area of the exit area 7, compared to the evaporation area 6.
  • This area of cross-sectional enlargement which in embodiment shown here from the exit area 7, the opening 10 and the recess 11 exists, forms one in its entirety Outlet area 12 for the media mass flow in the first media film 2. Due to the cross-sectional enlargement will be in the region of the exit region 12, set a much lower pressure gradient than this over the run length of the media stream in the evaporation zone 6 is the case.
  • Fig. 2 is now a principle cut through the first media sheet 2 and a plan view of the underneath arranged intermediate foil 4 recognizable. It is the exit area 9 of the second media film 3 is hidden indicated. He flows into one with the second Media sheet 3 corresponding collecting space 14, which all second media sheets 3 of the film packages 1 connects to each other, and which with an outlet line (not shown) for the second media stream corresponds.
  • the evaporator area 6 recognizable by which the first media stream according to the direction indicated by the arrow A flow direction flows.
  • the exit region 7 of the first media film 2 are then the opening 10 and arranged underneath Well 11 in the second media sheet 3, so the Exit area 12, recognizable.
  • This is in his Cross-section enlarging exit region 12 corresponds with a collecting space 15, which in turn with an outlet line (not shown) for the first media stream is connected.
  • the exit region 12 extends over the entire Width of the evaporation region 6 of the first media film 2, so that over the entire width of the Foliepaktes 1 the greatly reduced pressure gradient can adjust. Thus, it can be achieved that it is in this exit area 12 to a very small Pressure loss and thus to a very uniform Distribution of the flowing from the evaporation region 6 Medium is coming.
  • the area in the exit region 12 is arranged in the way in the film package 1, that he, as well as the evaporation areas 6, 8 and the Exit area 9, in direct heat-conducting contact is with the rooms 5 for heating is achieved that the exit area 12 is continuously heated, which also causes the formation of "cold" dead zones Prevents flow of media mass flow and the uniform distribution and mixing of the media mass flow before entering the collecting space 15th greatly improved.
  • the films 2, 3, 4 used for example to thin plates or films from a high-alloy steel material in which the recesses 11 and the structures in the evaporation areas 6, 8 are etched.

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)
  • Fuel Cell (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)

Description

Die Erfindung betrifft eine Folie für einen aus Folien aufgebauten, insbesondere zweigängigen, Verdampfer zur Überführung eines flüssigen Medien-Massenstroms in einen gasförmigen Medien-Massenstrom nach der im Oberbegriff von Anspruch 1 näher definierten Art.The invention relates to a film for a film constructed, in particular zweigängigen, evaporator for Transfer of a liquid mass flow of media in a gaseous media mass flow according to the preamble Of claim 1 further defined type.

Ein entsprechender, in vergleichbarer Weise aus Folien aufgebauter eingängiger Verdampfer ist in der DE 44 26 692 C1 beschrieben. Die dort beschriebene, zweistufige Verdampfereinheit dient zum Überführen eines in Abhängigkeit einer Lastvorgabe einstellbaren flüssigen Reaktand-Massenstroms in einen gasförmigen Reaktand-Massenstrom, wobei der flüssige Reaktand-Massenstrom mit Hilfe eines Wärmeträgermediums in einer ersten Stufe zumindest teilweise verdampft und in einer zweiten Stufe gegebenenfalls vollständig verdampft und anschließend überhitzt wird. Dabei wird vorgeschlagen, daß die Verdampfereinheit durch abwechselndes Aufeinanderstapeln von Folien mit Wärmeträgerkanälen und von Folien mit Reaktionskanälen ausgebildet ist, und daß jeweils zumindest eine erste und eine zweite Stufe in einer Folie integriert sind, wobei die erste Stufe als Kanal mit minimierter Querschnittsfläche an der sich direkt an die Zuströmleitung anschließt ausgebildet ist, und daß die erste Stufe bei hohen Wärmeübergangszahlen betrieben wird, und weiter daß der Gesamtquerschnitt der Reaktionskanäle in der zweiten Stufe in Strömungsrichtung zunimmt.A similar, in a similar way from slides constructed catchy evaporator is in DE 44 26 692 C1. The described there, two-stage Evaporator unit serves to transfer one in dependence a load specification adjustable liquid reactant mass flow in a gaseous reactant mass flow, wherein the liquid reactant mass flow with the aid of a heat transfer medium in a first Stage at least partially evaporated and in a second Stage if necessary completely evaporated and subsequently overheated. It is suggested that the evaporator unit by alternately stacking of films with heat transfer channels and of Foils with reaction channels is formed, and that in each case at least a first and a second stage in a foil are integrated, the first stage as Channel with minimized cross-sectional area at the itself formed directly adjacent to the inflow line is, and that the first stage at high heat transfer rates is operated, and further that the total cross section the reaction channels in the second stage in Flow direction increases.

Üblicherweise wird bei derartig aufgebauten Verdampfern der verdampfte Reaktand-Massenstrom aus jeder der Reaktions- bzw. Medienfolien in einen gemeinsamen Sammelraum im Austrittsbereich austreten und von dort wird über eine Austrittsleitung der gasförmige Reaktand-Massenstrom abgeleitet. In dem im Austrittsbereich angeordneten Sammelraum kann es dabei zu einer Durchmischung der aus den jeweiligen Reaktionsfolien strömenden Reaktand-Massenströmen kommen, so daß am Ausgang ein vergleichsweise gleichmäßig verdampfter Reaktand-Massenstrom vorliegt.Usually, with evaporators constructed in this way the vaporized reactant mass flow from each of the Reaction or media foils in a common collection space emerge in the exit area and from there is via an outlet line of the gaseous reactant mass flow derived. In the exit area arranged collecting space can be a Mixing of the respective reaction films flowing reactant mass flows come, so that the Output a comparatively evenly vaporized Reactant mass flow is present.

Dennoch weist eine derartige Verdampfereinheit den Nachteil auf, daß nicht sicher bestimmt werden kann in welchem Bereich der in die Folie eingebrachten Kanäle die eigentliche Verdampfung stattfindet, wodurch eine gleichmäßige Verteilung des zu verdampfenden Reaktand-Massenstroms in jeder der Folien selbst in nachteiliger Weise beeinflußt wird. Dieser Nachteil kann zwar durch die oben beschriebene Vermischung in dem Sammelraum teilweise aufgehoben werden, für die Effizienz und die bestmögliche Leistungsübertragung in der Verdampfereinheit wäre es jedoch wünschenswert, eine gleichmäßige Verteilung bereits in jeder der Folien zu bekommen. Ansonsten ist nämlich auch insgesamt mit sehr ungleichmäßig erwärmten bzw. verdampften Reaktand-Massenströmen zu rechnen, welche in Teilbereichen des Verdampfers bereits überhitzt werden, wobei in anderen Teilbereichen und gegebenenfalls auch im Ausgangsbereich noch flüssige Tröpfchen in dem Reaktand-Massenstrom vorliegen. Im schlimmsten Fall können sich deshalb "kalte Kanäle" in der Verdampfereinheit ausbilden durch welche vergleichsweise kalte, gegebenenfalls sogar flüssige Anteile des Reaktand-Massenstroms durch die Verdampfereinheit gelangen.Nevertheless, such an evaporator unit has the Disadvantage on that can not be determined with certainty which area of the channels introduced into the film the actual evaporation takes place, creating a uniform distribution of the reactant mass flow to be evaporated in each of the slides themselves in disadvantageous Way is affected. Although this disadvantage can by the above-described mixing in the collecting space be partially lifted for efficiency and the best possible power transfer in the evaporator unit however, it would be desirable to have one uniform distribution already in each of the slides too to get. Otherwise, that is also altogether with very unevenly heated or vaporized reactant mass flows to be expected, which in some areas the evaporator are already overheated, wherein in other sub-areas and, where appropriate, also in Output range still liquid droplets in the reactant mass flow available. In the worst case, you can Therefore, "cold channels" in the evaporator unit form by which comparatively cold, optionally even liquid portions of the reactant mass flow pass through the evaporator unit.

Es ist daher die Aufgabe der Erfindung eine ideale und daher gleichmäßige Verteilung des zu verdampfenden und des verdampften Mediums insbesondere im Austrittsbereich der Folien eines aus Folien aufgebauten Verdampfers zu erreichen.It is therefore the object of the invention an ideal and Therefore, even distribution of the vaporized and the evaporated medium, especially in the exit area the films of a built-up of films evaporator to reach.

Erfindungsgemäß wird diese Aufgabe durch die im kennzeichnenden Teil von Anspruch 1 genannten Merkmale gelöst.According to the invention, this object is achieved by the characterizing Part of claim 1 mentioned features solved.

Dadurch, daß der Druckgradient in dem Medium nur in den wenigsten Fällen des gesamten Austrittsbereichs deutlich kleiner ist, als der Druckgradient über die durchströmte Länge der Medienfolie wird eine sehr gleichmäßige Verteilung des verdampften Mediums in dem Austrittsbereich erreicht. Letztlich wird dies auch dadurch in besonders vorteilhafter Weise unterstützt, daß der Austrittsbereich beheizbar ist.Characterized in that the pressure gradient in the medium only in the least cases of the entire exit area is significantly smaller than the pressure gradient over the flowed through length of the media film is a very uniform distribution of the vaporized medium in the Exit area reached. Ultimately, so too thereby supported in a particularly advantageous manner, that the exit area is heatable.

Durch die sehr gleichmäßige Verteilung des Mediums über den gesamten Bereich, inbesondere über die gesamte Breite des Austrittsbereichs, welche durch den dort erheblich kleineren Druckgradienten als der Druckgradient über die durchströmte Länge, erreicht wird, kann sichergestellt werden, daß sich das Medium in dem Austrittsbereich sehr gleichmäßig verteilt, und daß keine Totzonen entstehen, in denen keine oder nur eine sehr geringe Medienströmung vorliegt. Damit kann erreicht werden, daß auch in dem in Strömungsrichtung direkt vor dem Austrittsbereich angeordneten Bereich der Medienfolie eine gleichmäßige Strömung und damit eine gleichmäßige Ausnutzung der zur Verfügung stehenden Energie stattfindet, da es hier nicht durch sich im Austrittsbereich sammelndes, stehendes Medium zu einem "Rückstau" in dem Bereich der Medienfolie kommen kann.Due to the very even distribution of the medium over the whole area, especially over the whole Width of the exit area, which by the there significantly smaller pressure gradient than the pressure gradient can be achieved over the flowed through length be ensured that the medium in the exit area distributed very evenly, and that no Dead zones arise in which none or only a very low media flow is present. This can be achieved be that in the direction of flow directly The area of the media film arranged in front of the exit area a steady flow and therefore one even utilization of the available Energy takes place, as it is not due to the Outlet area collecting, standing medium to one "Backwater" in the area of the media film can come.

Außerdem wird der Austrittsbereich in dem beheizten Bereich der Medienfolien angeordnet, so daß der Austrittsbereich über die reine Funktion eines Sammelraums hinausgeht und eine Durchmischung der über die Breite der jeweiligen Medienfolie austretenden gasförmigen Medienanteile in dem beheizten Austrittsbereich erfolgen kann. Damit kommt es zu einer sehr gleichmäßigen Verteilung des in der jeweiligen Folie verdampfenden Mediums, bevor dieses die Folie in einen Sämmelraum verläßt welcher dann mehrere derartige Folien und eine Austrittsleitung miteinander verbindet.In addition, the exit area is heated in the Area of the media sheets arranged so that the exit area about the pure function of a collection room goes out and a mix of over the Width of the respective media sheet exiting gaseous Media shares in the heated exit area can be done. This results in a very uniform Distribution of evaporating in the respective film Medium, before this the foil in a Sämmelraum which then leaves several such films and a discharge line connects to each other.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen und dem anhand der Zeichnung nachfolgend dargestellten Ausführungsbeispiel.Further advantageous embodiments of the invention emerge from the dependent claims and the basis the drawing below illustrated embodiment.

Es zeigt:

Fig. 1
einen Querschnitt durch einen Teil eines zweigängigen Verdampfers, und
Fig. 2
einen prinzipmäßigen Schnitt gemäß der Linie II-II in Fig. 1.
It shows:
Fig. 1
a cross-section through a part of a double-flighted evaporator, and
Fig. 2
a principle section along the line II-II in Fig. 1st

In Fig. 1 ist ein Folienpaket 1 eines in seiner Gesamtheit nicht dargestellten Verdampfers erkennbar. Der Verdampfer ist hier zweigängig aufgebaut. Dies bedeutet, daß der Verdampfer wenigstens zwei getrennte Eingänge für zwei Medien-Massenströme aufweist, entsprechend weist hier jedes der Folienpakete 1 eine erste Medienfolie 2 und eine zweite Medienfolie 3 auf. Zwischen den beiden Medienfolien 2, 3 ist hier eine Zwischenfolie 4 angeordnet. Diese drei Folien 2, 3, 4 sind dann zu dem Folienpaket 1 zusammengefaßt.In Fig. 1, a film pack 1 is one in its entirety Evaporator not shown recognizable. The evaporator is constructed here zweigängig. This means that the evaporator at least two separate Inputs for two media mass flows, accordingly Here, each of the foil packets 1 has a first media sheet 2 and a second media sheet 3. Between the two media slides 2, 3 is here one Intermediate foil 4 is arranged. These three foils 2, 3, 4 are then combined to form the film package 1.

Auf wenigstens zwei Seiten des Folienpakets 1 sind dann weitere Räume 5 in denen einen Heizmedium strömt oder in denen die thermische Energie zur Beheizung der Folienpakete 1 in irgendeiner anderen Art, beispielsweise durch eine katalytische Verbrennung oder dergleichen, zur Verfügung stellt wird. Ein denkbarer Aufbau wäre beispielsweise das abwechselnde Übereinanderstapeln von Folienpaketen 1 und Räumen 5, wie dies hier ansatzweise dargestellt ist.On at least two sides of the film package 1 are then more rooms 5 in which a heating medium flows or in which the thermal energy is used to heat the Foil packages 1 in any other way, for example by catalytic combustion or the like, is made available. A conceivable one Construction would be, for example, the alternating stacking of foil packets 1 and spaces 5, like this is shown here rudimentary.

Die erste Medienfolie 2 weist einen der Verdampfung und/oder Überhitzung des ersten Medienstroms dienenden Verdampfungsbereich 6 auf, an welchen sich in der Strömungsrichtung des Medienstroms ein Ausgangsbereich 7 anschließt. Der Verdampfungsbereich 6 weist dabei Strukturen, Kanäle, Gänge oder dergleichen auf, die hier nicht explizit dargestellt sind, da sie an sich bekannt und für die Erfindung von untergeordnetem Interesse sind. Der Ausgangsbereich 7 der ersten Medienfolie 2 kann, muß jedoch nicht, frei von derartigen Strukturen sein.The first media sheet 2 has one of the evaporation and / or overheating the first media stream serving Evaporation area 6, at which in the Flow direction of the media stream an exit area 7 connects. The evaporation region 6 points Structures, channels, aisles or the like, the not explicitly shown here, as they are in themselves known and for the invention of minor interest are. The exit region 7 of the first media film 2 may, but need not, be free from such Be structures.

Einen vergleichbaren Aufbau zeigt die zweite Medienfolie 3 welche ebenfalls einen Verdampfungsbereich 8 und einen Ausgangsbereich 9 aufweist.A comparable structure shows the second media slide 3 which also has an evaporation region 8 and has an output region 9.

Im Bereich des Ausgangsbereichs 7 der ersten Medienfolie 2 ist in der Zwischenfolie 4 eine Öffnung 10 angeordnet. Durch diese Öffnung 10 und eine Vertiefung 11 in der zweiten Medienfolie 3 ergibt sich somit eine starke Querschnittsvergrößerung im Bereich des Ausgangsbereichs 7, im Vergleich zu dem Verdampfungsbereich 6. Dieser Bereich der Querschnittsvergrößerung, welcher in hier dargestelltem Ausführungsbeispiel aus dem Ausgangsbereich 7, der Öffnung 10 und der Vertiefung 11 besteht, bildet in seiner Gesamtheit einen Austrittsbereich 12 für den Medien-Massenstrom in der ersten Medienfolie 2. Durch die Querschnittsvergrößerung wird sich im Bereich des Austrittsbereichs 12, ein weitaus geringerer Druckgradient einstellen als dies über die Lauflänge des Medienstroms in dem Verdampfungsbereich 6 der Fall ist.In the region of the exit region 7 of the first media film 2, an opening 10 is arranged in the intermediate foil 4. Through this opening 10 and a recess 11 in the second media film 3 thus results in a strong cross-sectional enlargement in the area of the exit area 7, compared to the evaporation area 6. This area of cross-sectional enlargement, which in embodiment shown here from the exit area 7, the opening 10 and the recess 11 exists, forms one in its entirety Outlet area 12 for the media mass flow in the first media film 2. Due to the cross-sectional enlargement will be in the region of the exit region 12, set a much lower pressure gradient than this over the run length of the media stream in the evaporation zone 6 is the case.

In der zweiten Medienfolie 3, deren Verdampfungsbereich 8 hier eine geringere Lauflänge aufweist als der Verdampfungsbereich 6 der ersten Medienfolie 2, ist eine derartige Vergrößerung des Querschnitts im Bereich des Ausgangsbereichs 9 aufgrund von technischen Gegebenheiten, welche die Erfindung nicht betreffen und welche hier nicht weiter erläutert werden sollen, nicht erwünscht. Prinzipiell wäre es jedoch auch hier denkbar, beispielsweise durch das Einbringen einer punktiert angedeuteten Vertiefung 13 in die Zwischenfolie 4, einen dem Austittsbereich 12 vergleichbaren Bereich zu schaffen.In the second media sheet 3, its evaporation area 8 here has a shorter run length than the Evaporation area 6 of the first media sheet 2, is Such an enlargement of the cross section in the area the exit area 9 due to technical Conditions which do not relate to the invention and which should not be explained further here, not wanted. In principle, it would be here, too conceivable, for example by introducing a dotted indicated recess 13 in the intermediate foil 4, a the Ausittsbereich 12 comparable Create area.

In Fig. 2 ist nun ein prinzipmäßger Schnitt durch die erste Medienfolie 2 bzw. eine Draufsicht auf die darunter angeordnete Zwischenfolie 4 erkennbar. Dabei ist der Austrittsbereich 9 der zweiten Medienfolie 3 verdeckt angedeutet. Er mündet in einen mit der zweiten Medienfolie 3 korrespondierenden Sammelraum 14, welcher sämtliche zweiten Medienfolien 3 der Folienpakete 1 untereinander verbindet, und welcher mit einer Austrittsleitung (nicht dargestellt) für den zweiten Medienstrom korrespondiert.In Fig. 2 is now a principle cut through the first media sheet 2 and a plan view of the underneath arranged intermediate foil 4 recognizable. It is the exit area 9 of the second media film 3 is hidden indicated. He flows into one with the second Media sheet 3 corresponding collecting space 14, which all second media sheets 3 of the film packages 1 connects to each other, and which with an outlet line (not shown) for the second media stream corresponds.

In der ersten Medienfolie 2 ist der Verdampferbereich 6 erkennbar durch welchen der erste Medienstrom gemäß der durch den Pfeil A angedeuteten Strömungsrichtung strömt. Im Ausgangsbereich 7 der ersten Medienfolie 2 sind dann die Öffnung 10 und die darunter angeordnete Vertiefung 11 in der zweiten Medienfolie 3, also der Austrittsbereich 12, erkennbar. Dieser sich in seinem Querschnitt vergrößernde Austrittsbereich 12 korrespondiert mit einem Sammelraum 15, welcher wiederum mit einer Austrittsleitung (nicht dargestellt) für den ersten Medienstrom verbunden ist.In the first media sheet 2 is the evaporator area 6 recognizable by which the first media stream according to the direction indicated by the arrow A flow direction flows. In the exit region 7 of the first media film 2 are then the opening 10 and arranged underneath Well 11 in the second media sheet 3, so the Exit area 12, recognizable. This is in his Cross-section enlarging exit region 12 corresponds with a collecting space 15, which in turn with an outlet line (not shown) for the first media stream is connected.

Der Austrittsbereich 12 verläuft dabei über die gesamte Breite des Verdampfungsbereichs 6 der ersten Medienfolie 2, so daß sich über die gesamte Breite des Folienpaktes 1 der stark verringerte Druckgradient einstellen kann. Somit kann erreicht werden, daß es in diesem Austrittsbereich 12 zu einem sehr geringen Druckverlust und damit zu einer sehr gleichmäßigen Verteilung des aus dem Verdampfungsbereich 6 strömenden Mediums kommt.The exit region 12 extends over the entire Width of the evaporation region 6 of the first media film 2, so that over the entire width of the Foliepaktes 1 the greatly reduced pressure gradient can adjust. Thus, it can be achieved that it is in this exit area 12 to a very small Pressure loss and thus to a very uniform Distribution of the flowing from the evaporation region 6 Medium is coming.

Durch die gute Gleichverteilung wird außerdem ein "Rückstau" der Strömung in den Verdampferbereich 6 verhindert, welcher ansonsten insbesondere in dem dem Sammelraum 15 abgewandten Ende des Austrittsbereichs 12 bzw. des Verdampfungsbereichs 6 auftreten könnte. Damit kann die gesamte Fläche des Verdampfungsbereichs 6 für die bestimmungsgemäße Aufgabe, nämlich die Überführung des flüssigen Medien-Massenstroms in den gasförmigen Medien-Massenstrom, genutzt werden, was letztendlich eine bessere Leistungsübertragung je Flächeneinheit ermöglicht, und was wiederum zu. einem kleineren Gesamt-Bauraum des Verdampfers führen kann. Auch erhöhte Materialspannungen durch einen sehr hohen Temperaturgradienten im Bereich von stehendem Medium in dem Folienpaket 1 können verhindert oder zumindest reduziert werden.Due to the good uniform distribution is also a "Backflow" of the flow in the evaporator section 6 prevents which otherwise, especially in the Collecting chamber 15 facing away from the exit area 12 or the evaporation region 6 could occur. This allows the entire area of the evaporation area 6 for the intended purpose, namely the transfer of the liquid media mass flow into the gaseous Media mass flow, be used, what ultimately a better power transfer per unit area allows, and in turn, to. one smaller overall space of the evaporator can lead. Also increased material stresses by a very high Temperature gradients in the range of stagnant medium in the film package 1 can be prevented or at least be reduced.

Dadurch, daß der Bereich in dem Austrittsbereich 12, in der Art in dem Folienpaket 1 angeordnet ist, daß er, ebenso wie die Verdampfungsbereiche 6, 8 und der Ausgangsbereich 9, in direktem wärmeleitendem Kontakt mit den Räumen 5 zur Beheizung steht, wird erreicht, daß der Austrittsbereich 12 durchgehend beheizt ist, was ebenfalls die Bildung von "kalten" Totzonen der Strömung des Medien-Massenstroms verhindert und die gleichmäßige Verteilung und Durchmischung des Medien-Massenstroms vor dem Eintreten in den Sammelraum 15 stark verbessert.Characterized in that the area in the exit region 12, is arranged in the way in the film package 1, that he, as well as the evaporation areas 6, 8 and the Exit area 9, in direct heat-conducting contact is with the rooms 5 for heating is achieved that the exit area 12 is continuously heated, which also causes the formation of "cold" dead zones Prevents flow of media mass flow and the uniform distribution and mixing of the media mass flow before entering the collecting space 15th greatly improved.

Selbstverständlich sind auch andere Bauformen eines Folienpakets 1 möglich, welche den gleichen, oder einen zumindest sehr ähnlichen Effekt erreichen würden. Of course, other designs are one Foil packages 1 possible, which is the same, or one would achieve at least very similar effect.

Beispielsweise könnten in die Zwischenfolie im Bereich der Ausgangsbereiche 7, 9 lediglich entsprechende Vertiefungen eingearbeitet und auf eine Öffnung 10 in der Zwischenfolie 4 verzichtet werden, so daß auch eine gleiche Lauflänge der Medien-Massenströme in den beiden Medienfolien 2, 3 durchaus denkbar wäre.For example, in the intermediate foil in the area the output regions 7, 9 only corresponding recesses incorporated and on an opening 10 in the Intermediate foil 4 are omitted, so that a same run length of media mass flows in the two Media slides 2, 3 would be quite conceivable.

Bei den eingesetzten Folien 2, 3, 4 kann es sich beispielsweise um dünne Platten bzw. Folien aus einem hochlegierten Stahlwerkstoff handeln, in die die Vertiefungen 11 und die Strukturen in der Verdampfungsbereichen 6, 8 eingeätzt sind.In the case of the films 2, 3, 4 used, for example to thin plates or films from a high-alloy steel material in which the recesses 11 and the structures in the evaporation areas 6, 8 are etched.

Claims (5)

  1. A lamina for an evaporator composed of laminae, in particular a two-pass evaporator for converting a liquid media mass stream into a gaseous media mass stream, comprising heatable lamina stacks, wherein each lamina stack has at least one media lamina perfused by the media and at least one further lamina, and wherein each lamina stack has an inlet area for the liquid media and an discharge area for the gaseous media,
    characterised in that
    the discharge area (12) is designed such that a pressure gradient in the media over the at least approximately entire width of the discharge area (12) is considerably smaller than a pressure gradient in the media over the at least approximately entire perfused length of the media lamina (2, 3), wherein the discharge area (12) is adapted to be heated.
  2. The lamina according to Claim 1,
    characterised in that
    the perfused cross-section over the at least approximately entire width of the discharge area (12) is considerably larger than the perfused length of the media lamina (2, 3).
  3. The lamina according to Claim 1 or 2,
    characterised in that
    the discharge area (12) is arranged in the heatable area of the lamina stack (1).
  4. The lamina according to Claim 1, 2 or 3,
    characterised in that
    the discharge area (12) is formed by recesses (10, 11) arranged in the at least one further lamina (3, 4).
  5. The lamina according to one of Claims 1 to 4,
    characterised in that
    in a two-pass evaporator the lamina stack (1) comprises two media laminae (2, 3) and an intermediate lamina (4), with the intermediate lamina (4) comprising at least one aperture (10) in the region of the discharge area (12) of the one of the media laminae (2), and the other of the media laminae (3) comprising indentations (11) in the region of the at least one aperture (10).
EP01104843A 2000-03-17 2001-02-28 Sheet for an evaporator made up of sheets Expired - Lifetime EP1134534B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10013437 2000-03-17
DE10013437A DE10013437C1 (en) 2000-03-17 2000-03-17 Foil package for an evaporator made of foils

Publications (2)

Publication Number Publication Date
EP1134534A1 EP1134534A1 (en) 2001-09-19
EP1134534B1 true EP1134534B1 (en) 2003-09-17

Family

ID=7635391

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01104843A Expired - Lifetime EP1134534B1 (en) 2000-03-17 2001-02-28 Sheet for an evaporator made up of sheets

Country Status (3)

Country Link
US (1) US6536515B2 (en)
EP (1) EP1134534B1 (en)
DE (2) DE10013437C1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6769128B1 (en) 1995-06-07 2004-07-27 United Video Properties, Inc. Electronic television program guide schedule system and method with data feed access
US5940073A (en) 1996-05-03 1999-08-17 Starsight Telecast Inc. Method and system for displaying other information in a TV program guide
US9113122B2 (en) * 1997-04-21 2015-08-18 Rovi Guides, Inc. Method and apparatus for time-shifting video and text in a text-enhanced television program
CN1941863B (en) 1997-07-21 2011-06-29 骏升发展(美国)有限公司 Method for displaying target advertisement to user in electronic program guide system
US6898762B2 (en) 1998-08-21 2005-05-24 United Video Properties, Inc. Client-server electronic program guide
TW543327B (en) * 2000-10-11 2003-07-21 United Video Properties Inc Systems and methods for supplementing on-demand media
US7801888B2 (en) 2007-03-09 2010-09-21 Microsoft Corporation Media content search results ranked by popularity
US9166714B2 (en) 2009-09-11 2015-10-20 Veveo, Inc. Method of and system for presenting enriched video viewing analytics

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2007033C3 (en) * 1970-02-17 1979-06-21 Hoechst Ag, 6000 Frankfurt Plate heat exchanger made of polytetrafluoroethylene
US4347896A (en) * 1979-10-01 1982-09-07 Rockwell International Corporation Internally manifolded unibody plate for a plate/fin-type heat exchanger
FR2496861A1 (en) * 1980-12-23 1982-06-25 Creusot Loire Plate heat exchanger for two fluids - esp. where river water is used to heat halogenated hydrocarbon refrigerant
DE3220774C2 (en) * 1982-06-02 1986-09-25 W. Schmidt GmbH & Co KG, 7518 Bretten Plate evaporator or condenser
US4516632A (en) * 1982-08-31 1985-05-14 The United States Of America As Represented By The United States Deparment Of Energy Microchannel crossflow fluid heat exchanger and method for its fabrication
JPS61243297A (en) * 1985-04-19 1986-10-29 Matsushita Electric Ind Co Ltd Lamination type heat exchanger
JP3236594B2 (en) 1988-03-02 2001-12-10 株式会社半導体エネルギー研究所 Member with carbon film formed
JP2892743B2 (en) * 1990-02-13 1999-05-17 松下冷機株式会社 Stacked heat exchanger
SE466171B (en) * 1990-05-08 1992-01-07 Alfa Laval Thermal Ab PLATTERS WORKS AATMONISONING A PLATHER WAS ASTMINSTERING A DIVISION WAS A DIVISIONALLY DIVISED BY A FAULTY OF A PORTABLE WORTH PREPARING ACHIEVENING,
GB9012618D0 (en) * 1990-06-06 1990-07-25 Rolls Royce Plc Heat exchangers
US5392849A (en) * 1990-09-28 1995-02-28 Matsushita Refrigeration Company Layer-built heat exchanger
DE4426692C1 (en) * 1994-07-28 1995-09-14 Daimler Benz Ag Vaporiser for transporting load of reactant mass flow
US5911273A (en) * 1995-08-01 1999-06-15 Behr Gmbh & Co. Heat transfer device of a stacked plate construction
DE19617396C2 (en) * 1996-05-02 1998-03-26 Dornier Gmbh Flow module

Also Published As

Publication number Publication date
DE50100625D1 (en) 2003-10-23
US6536515B2 (en) 2003-03-25
US20010045274A1 (en) 2001-11-29
EP1134534A1 (en) 2001-09-19
DE10013437C1 (en) 2001-12-06

Similar Documents

Publication Publication Date Title
DE3220774C2 (en) Plate evaporator or condenser
DE69316121T2 (en) Plate heat exchanger
EP1682840B1 (en) Heat exchanger in particular for motor vehicles
DE10033965C2 (en) heat exchangers
DE3650658T2 (en) Heat exchanger
EP1879674B1 (en) Micro-evaporator
DE60310992T2 (en) HIGH PRESSURE HEAT EXCHANGE
EP0910779A1 (en) Hard-soldered flat tube evaporator with a dual flow and one row in the air flow direction for a motor vehicle air conditioning system
DE112004001696T5 (en) Evaporator and process for evaporation
WO2005088219A1 (en) Heat exchanger for a motor vehicle air conditioning system
EP1856734A1 (en) Micro-heat exchanger
WO2002008680A1 (en) Heat transfer device
DE10220532A1 (en) Heat-exchange radiator has protruberances on sheets from hollow plate plane facing inwards
EP1134534B1 (en) Sheet for an evaporator made up of sheets
DE19933913C2 (en) Evaporator of an automotive air conditioning system
DE2722288B2 (en) Plate heat exchanger, in which plates following one another at a distance have through openings for the one heat exchange medium
DE2007033B2 (en) Plate heat exchanger made of polytetrafluoroethylene
EP1477761B1 (en) Plate heat exchanger
EP3009780B2 (en) Heat exchanger
EP3491323A1 (en) Heat exchanger having a micro-channel structure or wing tube structure
EP1800079A1 (en) Heat exchanger
DE102011113045A1 (en) Cross flow heat exchanger i.e. cross flow-micro heat exchanger, for rapid temperature-control of fluid stream in channel groups, has heat transfer regions arranged at intersections of channels of channel group
EP1588114B1 (en) Cross-counterflow layered heat exchanger
DE102011010021A1 (en) Cross flow heat exchanger
DE10010400A1 (en) Device for heating and/or evaporating liquid or gaseous media e.g. fuel in fuel cell, has regions whose surface temperatures can be individually set

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

Kind code of ref document: A1

Designated state(s): DE FR GB IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20011004

AKX Designation fees paid

Free format text: DE FR GB IT

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BALLARD POWER SYSTEMS AG

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20030917

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030917

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030917

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50100625

Country of ref document: DE

Date of ref document: 20031023

Kind code of ref document: P

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20030917

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040618

EN Fr: translation not filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20100219

Year of fee payment: 10

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50100625

Country of ref document: DE

Effective date: 20110901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110901

点击 这是indexloc提供的php浏览器服务,不要输入任何密码和下载