EP2577782A1 - Heatable media line, in particular for process media of a fuel cell system, and fuel cell system - Google Patents

Heatable media line, in particular for process media of a fuel cell system, and fuel cell system

Info

Publication number
EP2577782A1
EP2577782A1 EP11720292.9A EP11720292A EP2577782A1 EP 2577782 A1 EP2577782 A1 EP 2577782A1 EP 11720292 A EP11720292 A EP 11720292A EP 2577782 A1 EP2577782 A1 EP 2577782A1
Authority
EP
European Patent Office
Prior art keywords
branch
hose
media line
line according
fuel cell
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.)
Withdrawn
Application number
EP11720292.9A
Other languages
German (de)
French (fr)
Inventor
Harald Riedel
Jürgen Damberg
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.)
Rehau Automotive SE and Co KG
Original Assignee
Rehau AG and Co
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 Rehau AG and Co filed Critical Rehau AG and Co
Publication of EP2577782A1 publication Critical patent/EP2577782A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
    • F16L53/30—Heating of pipes or pipe systems
    • F16L53/35—Ohmic-resistance heating
    • F16L53/38—Ohmic-resistance heating using elongate electric heating elements, e.g. wires or ribbons
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
    • H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

Definitions

  • Heatable media line especially for process media
  • the invention relates to a heatable media line, in particular for process media of a fuel cell system.
  • such lines are heated by external resistance wires.
  • the wires serve to ensure a rapid de-icing of the lines at temperatures below the freezing point in order to produce the operability of the fuel cell system as early as possible.
  • the heating by external resistance wires has the disadvantage that in the coupling region of the lines no heating is possible and therefore it takes a comparatively long time to complete the required warm-up and the fuel cell is ready for use.
  • the speed with which the de-icing of the lines is performed, is crucial in terms of design complexity of the entire system. For if the defrosting process takes a long time, the operation of the vehicle by means of an accumulator is to be ensured for a correspondingly long period of time.
  • the invention has for its object to provide a heatable media line, especially for process media (eg H 2 , 0 2 or the reaction product H 2 0) of a fuel cell system, which allows fast de-icing at temperatures below the freezing point of water.
  • process media eg H 2 , 0 2 or the reaction product H 2 0
  • this object is achieved by a heatable media line, in particular for process media of a fuel cell system, with a hose line for media transport at least one lovedsSchdraht connectable to an electrical power source for heating the medium, - wherein the lovedsflowerdraht is at least partially disposed in the inner cavity of the tubing, wherein the lovedsSchdraht at least one branch in the tubing into the tubing into and out of this wherein, in the region of the branch, a branch-closing plug is arranged with at least one opening for the passage of the lovedsflowerdrahts, and - wherein the plug is pressed into the branch, so that at the same time a sealing of the covered by the lovedsflowerdraht opening is ensured.
  • the teaching of the invention is characterized by a very simple structural design, with the aid of which an internal heating of the media line can be realized.
  • This has the advantage that, in particular in the end-side coupling regions of the media line, direct heating of the same is possible, as a result of which the required duration of the de-icing process is considerably reduced. Accordingly, the accumulator for bridging the deicing period can be dimensioned very small when using the teaching of the invention.
  • the plug has an opening for the introduction and an opening for the lead-out of the resistance heating wire.
  • the resistance heating wire is looped inside the media line and the circuit can be closed via a corresponding connection of the two ends of the resistance heating wire in the region of the plug.
  • the stopper expediently contains polytetrafluoroethylene (PTFE) or the stopper consists of this material.
  • PTFE has the advantage that it is dimensionally stable, but at the same time has a certain flexibility. In this specific case, the application tion of this material a particularly secure sealing of the plug.
  • the plug is pressed by means of a compression sleeve into the branch.
  • the compression sleeve is expediently arranged on the outside of the branch and consists for example of metal, in particular stainless steel or brass. By the compression sleeve thus both openings are securely sealed in the plug.
  • the plug can also be conical and / or the plug can be pressed into a conically shaped receiving section of the branch.
  • the resistance heating wire is expediently, at least in the region of the inner cavity of the hose, provided with a plastic sheath to avoid electrical short circuits.
  • the requirements for the adjustable heating power are particularly high for media lines for fuel cell systems. So usually heating capacities of at least 30 W / m hose, in particular at least 40 W / m are required.
  • the resistance heating wire is therefore advantageously spirally wound inside the hose line. This has the consequence that the heating energy-emitting wire length per unit length hose can be significantly increased.
  • the length of the lovedsSdrahtes in the region of the inner cavity of the hose is about 3 to 5 times as large as the total length of the spiral windings.
  • the cremasSchinskydraht is looped within the tubing, wherein a loop forms a spiral winding by a corresponding winding technique.
  • a special winding technique is required, which on the one hand ensures the desired winding arrangement and on the other hand at the same time allows the likewisel fenförmige arrangement of keepssSchdrahts, so that both ends of the wire can be electrically contacted on the same plug.
  • two loop-shaped spiral windings are provided which extend from the branch in both directions of the hose. As a result, a comparatively long region of the media line can be equipped with the desired internal heating by means of a single branch.
  • the invention also provides a fuel cell system with a heatable media line according to claim 11.
  • the application of the teaching according to the invention is not limited to the transport of process media of a fuel cell system. Rather, the application is also generally possible in other areas, for example in the automotive sector (eg for heating a windscreen washer system).
  • Another area of application of the teaching according to the invention is, in particular, the transport of urea-water solutions, for example standardized to DIN 70070 and CEFIC (European Chemical Industry Council). These are added, for example, to the combustion exhaust gases of diesel engines, in order to lower the emissions of styrene in particular and thus to meet the ever-increasing requirements of the exhaust emission regulations.
  • FIG. 1 is an illustration of a heatable media line according to the invention and Fig. 2 is a fragmentary view of a heatable according to the invention
  • Figures 1 and 2 show a heatable media line for process media (eg H 2 , 0 2 or the reaction product H 2 0) a (not shown) fuel cell system.
  • the media line has a hose line 1 for media transport and a resistance heating wire 2 which can be connected to a (not shown) electrical power source for heating the medium.
  • the hose 1 can be connected via couplings 3, which are preferably designed as quick couplings with other hose lines 1 '.
  • such couplings 3 also serve to connect a hose line to the fuel cell system.
  • the resistance heating wire 2 is arranged in regions in the inner cavity of the hose line 1.
  • the resistance heating wire 2 via a branch 4 in the
  • a branch 4 closing plug 5 with two openings 6 for carrying the two ends 7 of Resistance heating wire 2 is arranged in the region of the branch 4.
  • the plug 5 is pressed sealingly into the branch 4 by means of a compression sleeve 8, so that at the same time sealing of the openings 6 through which the resistance heating wire 2 passes is ensured.
  • the plug 5 in this case has over the corresponding free cross section of the branch 4 a certain excess.
  • the circumferential surface of the plug 5 is thus pressed against the associated inner surface 20 of the branch 4.
  • the plug 5 has a diameter of 3 to 4 mm, in particular approximately 3.5 mm.
  • the plug 5 is made of polytetrafluoroethylene, while the arranged on the outside of the branch 4 compression sleeve 8 is made of stainless steel.
  • the resistance heating wire 2 is provided with a plastic casing 9.
  • the diameter of the two openings 6 is about 0.8 to 1 mm, in particular about 0.9 mm.
  • the plastic sheath made of FEP (tetrafluoroethylene / hexafluoropropylene).
  • the resistance heating wire 2 is spirally wound inside the hose line 1.
  • There are two loop-shaped spiral windings 13 are provided, which extend starting from the branch 4 in both directions of the hose 1.
  • the resistance heating wire 2 is guided within the hose line 1 such that both loops 10 and 10 'form a spiral winding 13 by a corresponding winding technique.
  • a loop leg 11 is formed which is surrounded in a spiral shape by the other loop leg 12.
  • both loop legs 1 and 12' are spirally formed, as a result of which the heat output achievable per unit length of hose line increases significantly again.
  • the length of the lovedsproofdrahts 2 in the inner cavity of the hose 1 is 3 to 5 times, in particular about 4 times, as large as the total length L of the spiral windings 13.
  • both loop legs 11, 12 are spirally formed or in the right loop 10' - analogous to the left loop 10 - only the loop legs 12 'spiral, the loop legs 11 ' are contrasted stretched.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Pipe Accessories (AREA)
  • Fuel Cell (AREA)

Abstract

The invention relates to a heatable media line, in particular for process media of a fuel cell system, comprising a hose line (1) for transporting media, at least one resistance heating wire (2) that can be connected to an electrical current source for heating the medium, wherein the resistance heating wire (2) is arranged in the inner cavity of the hose line (1) at least in some sections of the resistance heating wire, wherein the resistance heating wire (2) is led into and/or out of the hose line (1) through at least one branch (4) in the hose line (1), wherein a plug (5), which closes the branch (4) and which has at least one opening (6) for feeding the resistance heating wire (2) through, is arranged in the vicinity of the branch (4), and wherein the plug (5) is pressed into the branch (4) so that at the same time a seal of the opening (6) penetrated by the resistance heating wire (2) is thereby ensured.

Description

Beheizbare Medienleitung, insbesondere für Prozessmedien  Heatable media line, especially for process media
einer Brennstoffzellenanlage, sowie Brennstoffzellenanlage  a fuel cell system, and fuel cell system
Die Erfindung betrifft eine beheizbare Medienleitung, insbesondere für Prozessmedien einer Brennstoffzellenanlage. The invention relates to a heatable media line, in particular for process media of a fuel cell system.
Gemäß dem Stand der Technik werden derartige Leitungen durch außen liegende Wider- Standsdrähte beheizt. Die Drähte dienen dazu, bei Temperaturen unterhalb des Gefrierpunktes für eine schnelle Enteisung der Leitungen zu sorgen, um möglichst frühzeitig die Betriebsfähigkeit der Brennstoffzellenanlage herstellen zu können. Die Beheizung durch außen liegende Widerstandsdrähte hat den Nachteil, dass im Kupplungsbereich der Leitungen keine Beheizung möglich ist und es daher eine vergleichsweise lange Zeit dauert, bis der erforderliche Aufwärmvorgang vollzogen und die Brennstoffzelle betriebsbereit ist. Die Geschwindigkeit, mit der die Enteisung der Leitungen vollzogen wird, ist entscheidend hinsichtlich des konstruktiven Aufwandes der gesamten Anlage. Denn sofern der Entei- sungsvorgang eine lange Zeit braucht, ist für eine entsprechend lange Zeitdauer der Betrieb des Fahrzeuges mittels eines Akkumulators sicherzustellen. Bei einer langen Entei- sungszeit muss dieser Akkumulator somit sehr groß dimensioniert werden. Im Gegensatz dazu reduziert sich durch eine schnelle Enteisung die erforderliche Größe des die Entei- sungszeit überbrückenden Akkumulators deutlich, wodurch der konstruktive Aufwand der gesamten Brennstoffzellenanlage kleiner wird. Vor diesem Hintergrund liegt der Erfindung die Aufgabe zugrunde, eine beheizbare Medienleitung, insbesondere für Prozessmedien (z.B. H2, 02 oder dem Reaktionsprodukt H20) einer Brennstoffzellenanlage bereitzustellen, welche bei Temperaturen unterhalb des Gefrierpunktes von Wasser eine schnelle Enteisung ermöglicht. Erfindungsgemäß wird diese Aufgabe gelöst durch eine beheizbare Medienleitung, insbesondere für Prozessmedien einer Brennstoffzellenanlage, mit einer Schlauchleitung zum Medientransport mindestens einem, an eine elektrische Stromquelle anschließbaren Widerstandsheizdraht zur Beheizung des Mediums, - wobei der Widerstandsheizdraht zumindest bereichsweise im inneren Hohlraum der Schlauchleitung angeordnet ist, wobei der Widerstandsheizdraht über mindestens eine Abzweigung in der Schlauchleitung in die Schlauchleitung hinein- und / oder aus dieser herausgeführt ist, wobei im Bereich der Abzweigung ein die Abzweigung verschließender Stopfen mit mindestens einer Öffnung zur Durchführung des Widerstandsheizdrahts angeordnet ist, und - wobei der Stopfen in die Abzweigung eingepresst ist, so dass hierdurch gleichzeitig eine Abdichtung der von dem Widerstandsheizdraht durchfassten Öffnung gewährleistet ist. According to the prior art, such lines are heated by external resistance wires. The wires serve to ensure a rapid de-icing of the lines at temperatures below the freezing point in order to produce the operability of the fuel cell system as early as possible. The heating by external resistance wires has the disadvantage that in the coupling region of the lines no heating is possible and therefore it takes a comparatively long time to complete the required warm-up and the fuel cell is ready for use. The speed with which the de-icing of the lines is performed, is crucial in terms of design complexity of the entire system. For if the defrosting process takes a long time, the operation of the vehicle by means of an accumulator is to be ensured for a correspondingly long period of time. With a long defrosting time, this accumulator must therefore be dimensioned very large. By contrast, the required size of the accumulator bridging the defrosting time is significantly reduced by rapid de-icing, which reduces the design complexity of the entire fuel cell system. Against this background, the invention has for its object to provide a heatable media line, especially for process media (eg H 2 , 0 2 or the reaction product H 2 0) of a fuel cell system, which allows fast de-icing at temperatures below the freezing point of water. According to the invention, this object is achieved by a heatable media line, in particular for process media of a fuel cell system, with a hose line for media transport at least one Widerstandsheizdraht connectable to an electrical power source for heating the medium, - wherein the Widerstandsheizdraht is at least partially disposed in the inner cavity of the tubing, wherein the Widerstandsheizdraht at least one branch in the tubing into the tubing into and out of this wherein, in the region of the branch, a branch-closing plug is arranged with at least one opening for the passage of the Widerstandsheizdrahts, and - wherein the plug is pressed into the branch, so that at the same time a sealing of the covered by the Widerstandsheizdraht opening is ensured.
Die erfindungsgemäße Lehre zeichnet sich durch eine sehr einfache konstruktive Gestal- tung aus, mit deren Hilfe eine Innenbeheizung der Medienleitung realisierbar ist. Dies hat den Vorteil, dass insbesondere in den endseitigen Kupplungsbereichen der Medienleitung eine unmittelbare Beheizung derselben möglich ist, wodurch sich die erforderliche Dauer des Enteisungsvorgangs beträchtlich reduziert. Entsprechend kann bei Anwendung der erfindungsgemäßen Lehre der Akkumulator zur Überbrückung des Enteisungszeitraums sehr klein dimensioniert werden. The teaching of the invention is characterized by a very simple structural design, with the aid of which an internal heating of the media line can be realized. This has the advantage that, in particular in the end-side coupling regions of the media line, direct heating of the same is possible, as a result of which the required duration of the de-icing process is considerably reduced. Accordingly, the accumulator for bridging the deicing period can be dimensioned very small when using the teaching of the invention.
Vorzugsweise weist der Stopfen eine Öffnung für die Hineinführung und eine Öffnung für die Herausführung des Widerstandsheizdrahts auf. Dies bedeutet, dass der Widerstandsheizdraht im Inneren der Medienleitung schlaufenförmig verlegt ist und der Stromkreis über einen entsprechenden Anschluss der beiden Enden des Widerstandsheizdrahtes im Bereich des Stopfens geschlossen werden kann. Preferably, the plug has an opening for the introduction and an opening for the lead-out of the resistance heating wire. This means that the resistance heating wire is looped inside the media line and the circuit can be closed via a corresponding connection of the two ends of the resistance heating wire in the region of the plug.
Zweckmäßigerweise enthält der Stopfen Polytetrafluorethylen (PTFE) bzw. besteht der Stopfen aus diesem Material. PTFE besitzt den Vorteil, dass es formbeständig ist, gleich- zeitig aber eine gewisse Flexibilität aufweist. Im konkreten Fall gewährleistet die Anwen- dung dieses Materials eine besonders sichere Abdichtung des Stopfens. Vorzugsweise ist der Stopfen mittels einer Presshülse in die Abzweigung eingepresst ist. Die Presshülse ist zweckmäßigerweise an der Außenseite der Abzweigung angeordnet und besteht z.B. aus Metall, insbesondere Edelstahl oder Messing. Durch die Presshülse werden somit beide Öffnungen im Stopfen sicher abgedichtet. Alternativ hierzu kann der Stopfen aber auch konisch ausgebildet und/oder der Stopfen in einen konisch ausgebildeten Aufnahmeabschnitt der Abzweigung eingepresst sein. Der Widerstandsheizdraht ist zweckmäßigerweise, zumindest im Bereich des inneren Hohlraums der Schlauchleitung, mit einer Kunststoff- ummantelung versehen, um elektrische Kurzschlüsse zu vermeiden. The stopper expediently contains polytetrafluoroethylene (PTFE) or the stopper consists of this material. PTFE has the advantage that it is dimensionally stable, but at the same time has a certain flexibility. In this specific case, the application tion of this material a particularly secure sealing of the plug. Preferably, the plug is pressed by means of a compression sleeve into the branch. The compression sleeve is expediently arranged on the outside of the branch and consists for example of metal, in particular stainless steel or brass. By the compression sleeve thus both openings are securely sealed in the plug. Alternatively, however, the plug can also be conical and / or the plug can be pressed into a conically shaped receiving section of the branch. The resistance heating wire is expediently, at least in the region of the inner cavity of the hose, provided with a plastic sheath to avoid electrical short circuits.
Die Anforderungen an die einstellbare Heizleistung sind bei Medienleitungen für Brennstoffzellenanlagen besonders hoch. So werden in der Regel Heizleistungen von mindestens 30 W/m Schlauchleitung, insbesondere mindestens 40 W/m gefordert. Um diese hohe Heizleistung bereitstellen zu können, ist der Widerstandsheizdraht daher innerhalb der Schlauchleitung zweckmäßigerweise spiralförmig gewickelt. Dies hat zur Folge, dass die Heizenergie abgebende Drahtlänge pro Längeneinheit Schlauchleitung deutlich erhöht werden kann. Vorzugsweise ist die Länge des Widerstandsheizdrahtes im Bereich des inneren Hohlraums der Schlauchleitung ca. 3 bis 5 Mal so groß wie die Gesamtlänge der Spiralwicklungen. The requirements for the adjustable heating power are particularly high for media lines for fuel cell systems. So usually heating capacities of at least 30 W / m hose, in particular at least 40 W / m are required. In order to be able to provide this high heating power, the resistance heating wire is therefore advantageously spirally wound inside the hose line. This has the consequence that the heating energy-emitting wire length per unit length hose can be significantly increased. Preferably, the length of the Widerstandsheizdrahtes in the region of the inner cavity of the hose is about 3 to 5 times as large as the total length of the spiral windings.
Gemäß einer bevorzugten Ausführungsform der Erfindung ist der Widerstandsheizdraht innerhalb der Schlauchleitung schlaufenförmig geführt, wobei eine Schlaufe durch eine entsprechende Wickeltechnik eine Spiralwicklung bildet. Zur Erzeugung einer solchen spiralförmigen Wicklung ist eine spezielle Wickeltechnik erforderlich, welche einerseits die gewünschte Wicklungsanordnung gewährleistet und andererseits gleichzeitig die schlau- fenförmige Anordnung des Widerstandsheizdrahts ermöglicht, so dass beide Enden des Drahts an ein und demselben Stopfen elektrisch kontaktiert werden können. Zweckmäßigerweise sind zwei schlaufenförmige Spiralwicklungen vorgesehen, die sich ausgehend von der Abzweigung in beide Richtungen der Schlauchleitung erstrecken. Hierdurch kann mittels einer einzigen Abzweigung ein vergleichsweise langer Bereich der Medienleitung mit der gewünschten Innenbeheizung ausgerüstet werden. According to a preferred embodiment of the invention, the Widerstandsheizdraht is looped within the tubing, wherein a loop forms a spiral winding by a corresponding winding technique. To produce such a spiral winding, a special winding technique is required, which on the one hand ensures the desired winding arrangement and on the other hand at the same time allows the schlüssel fenförmige arrangement of Widerstandsheizdrahts, so that both ends of the wire can be electrically contacted on the same plug. Conveniently, two loop-shaped spiral windings are provided which extend from the branch in both directions of the hose. As a result, a comparatively long region of the media line can be equipped with the desired internal heating by means of a single branch.
Gegenstand der Erfindung ist auch eine Brennstoffzellenanlage mit einer beheizbaren Medienleitung gemäß Anspruch 11. Die Anwendung der erfindungsgemäßen Lehre ist nicht allein auf den Transport von Prozessmedien einer Brennstoffzellenanlage beschränkt. Vielmehr ist die Anwendung auch in anderen Bereichen generell möglich, beispielsweise im Automobilbereich (z.B. zur Beheizung einer Scheibenwaschanlage). Ein weiterer Anwendungsbereich der erfindungsgemä- ßen Lehre ist insbesondere der Transport von Harnstoff-Wasser-Lösungen, beispielsweise genormt nach DIN 70070 und CEFIC (European Chemical Industry Council). Diese werden z.B. den Verbrennungsabgasen von Dieselmotoren zugegeben, um vor allem die Stichoxidemissionen zu senken und damit die immer weiter steigenden Anforderungen der Abgasvorschriften zu erfüllen. Für die Leitung der Harnstoff-Wasser-Lösungen aus einem Tank zur Einspritzung in die Verbrennungsgase ist in der Regel eine Temperierungsmöglichkeit der Schlauchleitung erforderlich, weil die Harnstoff-Wasser-Lösung aufgrund ihrer chemischen Zusammensetzung den Nachteil hat, dass sie bei ca. - 1 1° C ausflockt bzw. gefriert. Im Folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlich erläutert. Es zeigen schematisch: The invention also provides a fuel cell system with a heatable media line according to claim 11. The application of the teaching according to the invention is not limited to the transport of process media of a fuel cell system. Rather, the application is also generally possible in other areas, for example in the automotive sector (eg for heating a windscreen washer system). Another area of application of the teaching according to the invention is, in particular, the transport of urea-water solutions, for example standardized to DIN 70070 and CEFIC (European Chemical Industry Council). These are added, for example, to the combustion exhaust gases of diesel engines, in order to lower the emissions of styrene in particular and thus to meet the ever-increasing requirements of the exhaust emission regulations. For the management of urea-water solutions from a tank for injection into the combustion gases Temperierungsmöglichkeit the hose is usually required because the urea-water solution due to its chemical composition has the disadvantage that it at about - 1 1 ° C flocculates or freezes. In the following the invention will be explained in detail with reference to a drawing showing only one embodiment. They show schematically:
Fig. 1 eine Darstellung einer erfindungsgemäßen beheizbaren Medienleitung und Fig. 2 eine ausschnittsweise Darstellung einer erfindungsgemäßen beheizbaren Fig. 1 is an illustration of a heatable media line according to the invention and Fig. 2 is a fragmentary view of a heatable according to the invention
Medienleitung.  Media line.
Die Figuren 1 und 2 zeigen eine beheizbare Medienleitung für Prozessmedien (z.B. H2, 02 oder dem Reaktionsprodukt H20) einer (nicht näher dargestellten) Brennstoffzellenanlage. Die Medienleitung weist eine Schlauchleitung 1 zum Medientransport und einen an eine (nicht dargestellte) elektrische Stromquelle anschließbaren Widerstandsheizdraht 2 zur Beheizung des Mediums auf. Die Schlauchleitung 1 kann über Kupplungen 3, die vorzugsweise als Schnellkupplungen ausgebildet sind, mit anderen Schlauchleitungen 1 ' verbunden werden. Entsprechend dienen derartige Kupplungen 3 aber auch dazu, eine Schlauch- leitung an die Brennstoffzellenanlage anzuschließen. Wie der Fig. 1 zu entnehmen ist, ist der Widerstandsheizdraht 2 bereichsweise im inneren Hohlraum der Schlauchleitung 1 angeordnet. Hierbei wird der Widerstandsheizdraht 2 über eine Abzweigung 4 in der Figures 1 and 2 show a heatable media line for process media (eg H 2 , 0 2 or the reaction product H 2 0) a (not shown) fuel cell system. The media line has a hose line 1 for media transport and a resistance heating wire 2 which can be connected to a (not shown) electrical power source for heating the medium. The hose 1 can be connected via couplings 3, which are preferably designed as quick couplings with other hose lines 1 '. Correspondingly, however, such couplings 3 also serve to connect a hose line to the fuel cell system. As can be seen from FIG. 1, the resistance heating wire 2 is arranged in regions in the inner cavity of the hose line 1. Here, the resistance heating wire 2 via a branch 4 in the
Schlauchleitung 1 in die Schlauchleitung 1 hinein- und auch aus dieser wieder herausgeführt. Fig. 2 ist zu entnehmen, dass im Bereich der Abzweigung 4 ein die Abzweigung 4 verschließender Stopfen 5 mit zwei Öffnungen 6 zur Durchführung der beiden Enden 7 des Widerstandsheizdrahts 2 angeordnet ist. Der Stopfen 5 ist mittels einer Presshülse 8 in die Abzweigung 4 dichtend eingepresst, so dass hierdurch gleichzeitig eine Abdichtung der von dem Widerstandsheizdraht 2 durchfassten Öffnungen 6 gewährleistet ist. Der Stopfen 5 besitzt hierbei gegenüber dem entsprechenden freien Querschnitt der Abzweigung 4 ein gewisses Übermaß. Beim Einpressen wird somit die Umfangsfläche des Stopfens 5 gegen die zugeordnete innere Oberfläche 20 der Abzweigung 4 gepresst.Jm Ausführungsbeispiel weist der Stopfen 5 einen Durchmesser von 3 bis 4 mm, insbesondere ca. 3,5 mm auf. Der Stopfen 5 besteht aus Polytetrafluorethylen, während die an der Außenseite der Abzweigung 4 angeordnete Presshülse 8 aus Edelstahl besteht. Der Widerstandsheizdraht 2 ist mit einer Kunststoffummantelung 9 versehen. Der Durchmesser der beiden Öffnungen 6 beträgt ca. 0,8 bis 1 mm, insbesondere ca. 0,9 mm. Im Ausführungsbeispiel besteht die Kunststoffummantelung aus FEP (Tetrafluorethylen / Hexafluorpropylen). Hose line 1 into the hose 1 and also led out of this again. Fig. 2 it can be seen that in the region of the branch 4, a branch 4 closing plug 5 with two openings 6 for carrying the two ends 7 of Resistance heating wire 2 is arranged. The plug 5 is pressed sealingly into the branch 4 by means of a compression sleeve 8, so that at the same time sealing of the openings 6 through which the resistance heating wire 2 passes is ensured. The plug 5 in this case has over the corresponding free cross section of the branch 4 a certain excess. When pressing in, the circumferential surface of the plug 5 is thus pressed against the associated inner surface 20 of the branch 4. In the exemplary embodiment, the plug 5 has a diameter of 3 to 4 mm, in particular approximately 3.5 mm. The plug 5 is made of polytetrafluoroethylene, while the arranged on the outside of the branch 4 compression sleeve 8 is made of stainless steel. The resistance heating wire 2 is provided with a plastic casing 9. The diameter of the two openings 6 is about 0.8 to 1 mm, in particular about 0.9 mm. In the exemplary embodiment, the plastic sheath made of FEP (tetrafluoroethylene / hexafluoropropylene).
Wie der Fig. 1 zu entnehmen ist, ist der Widerstandsheizdraht 2 innerhalb der Schlauchlei- tung 1 spiralförmig gewickelt. Es sind zwei schlaufenförmige Spiralwicklungen 13 vorgesehen, die sich ausgehend von der Abzweigung 4 in beide Richtungen der Schlauchleitung 1 erstrecken. Hierbei ist der Widerstandsheizdraht 2 innerhalb der Schlauchleitung 1 derart geführt, dass beide Schlaufen 10 bzw. 10' durch eine entsprechende Wickeltechnik jeweils eine Spiralwicklung 13 bilden. Bei der linken Schlaufe 10 ist ein Schlaufenschenkel 11 ge- streckt ausgebildet, der von dem anderen Schlaufenschenkel 12 spiralförmig umgeben ist. Bei der rechten Schlaufe 10' hingegen sind beide Schlaufenschenkel 1 und 12' spiralförmig ausgebildet, wodurch sich die pro Längeneinheit Schlauchleitung erzielbare Heizleistung nochmals deutlich erhöht. Die Länge des Widerstandsheizdrahts 2 im inneren Hohlraum der Schlauchleitung 1 ist 3 bis 5 Mal, insbesondere ca. 4 Mal, so groß wie die Ge- samtlänge L der Spiralwicklungen 13. Im Rahmen der Erfindung liegt es auch, dass bei der linken Schlaufe 10 - analog zur rechten Schlaufe 10' - beide Schlaufenschenkel 11 , 12 spiralförmig ausgebildet sind oder bei der rechten Schlaufe 10' - analog zur linken Schlaufe 10 - nur der Schlaufenschenkel 12' spiralförmig, der Schlaufenschenkel 11 ' hingegen gestreckt ausgebildet sind. As can be seen from FIG. 1, the resistance heating wire 2 is spirally wound inside the hose line 1. There are two loop-shaped spiral windings 13 are provided, which extend starting from the branch 4 in both directions of the hose 1. In this case, the resistance heating wire 2 is guided within the hose line 1 such that both loops 10 and 10 'form a spiral winding 13 by a corresponding winding technique. In the case of the left loop 10, a loop leg 11 is formed which is surrounded in a spiral shape by the other loop leg 12. In the case of the right-hand loop 10 ', on the other hand, both loop legs 1 and 12' are spirally formed, as a result of which the heat output achievable per unit length of hose line increases significantly again. The length of the Widerstandsheizdrahts 2 in the inner cavity of the hose 1 is 3 to 5 times, in particular about 4 times, as large as the total length L of the spiral windings 13. In the invention it is also that in the left loop 10 - analogous to the right loop 10 '- both loop legs 11, 12 are spirally formed or in the right loop 10' - analogous to the left loop 10 - only the loop legs 12 'spiral, the loop legs 11 ' are contrasted stretched.
- Patentansprüche - - Claims -

Claims

Patentansprüche claims
1. Beheizbare Medienleitung, insbesondere für Prozessmedien einer Brennstoffzellenanlage, mit einer Schlauchleitung (1) zum Medientransport, mindestens einem, an eine elektrische Stromquelle anschließbaren Widerstandsheizdraht (2) zur Beheizung des Mediums, wobei der Widerstandsheizdraht (2) zumindest bereichsweise im inneren Hohlraum der Schlauchleitung (1) angeordnet ist, wobei der Widerstandsheizdraht (2) über mindestens eine Abzweigung (4) in der Schlauchleitung (1) in die Schlauchleitung (1) hinein- und / oder aus dieser herausgeführt ist, wobei im Bereich der Abzweigung (4) ein die Abzweigung (4) verschließender Stopfen (5) mit mindestens einer Öffnung (6) zur Durchführung des Widerstandsheizdrahts (2) angeordnet ist, und wobei der Stopfen (5) in die Abzweigung (4) eingepresst ist, so dass hierdurch gleichzeitig eine Abdichtung der von dem Widerstandsheizdraht (2) durchfassten Öffnung (6) gewährleistet ist. 1. Heated media line, in particular for process media of a fuel cell system, with a hose line (1) for media transport, at least one, connectable to an electrical power source Widerstandsheizdraht (2) for heating the medium, wherein the Widerstandsheizdraht (2) at least partially in the inner cavity of the hose (1) is arranged, wherein the Widerstandsheizdraht (2) via at least one branch (4) in the hose line (1) into the hose line (1) and out of this, wherein in the region of the branch (4) a the branch (4) closing plug (5) with at least one opening (6) for carrying the resistance heating wire (2) is arranged, and wherein the plug (5) is pressed into the branch (4), thereby simultaneously sealing the is ensured by the resistance heating wire (2) encompassed opening (6).
Beheizbare Medienleitung nach Anspruch, dadurch gekennzeichnet, dass der Stopfen (5) eine Öffnung (6) für die Hineinführung und eine Öffnung (6) für Herausführung des Widerstandsheizdrahts (2) aufweist. Heatable media line according to claim, characterized in that the stopper (5) has an opening (6) for the introduction and an opening (6) for taking out the resistance heating wire (2).
Beheizbare Medienleitung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Stopfen (5) aus PTFE besteht. Heatable media line according to claim 1 or 2, characterized in that the plug (5) consists of PTFE.
4. Beheizbare Medienleitung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Stopfen (5) mittels einer Presshülse (8) in die Abzweigung (4) einge- presst ist. 4. Heated media line according to one of claims 1 to 3, characterized in that the plug (5) by means of a compression sleeve (8) in the branch (4) is pressed.
5. Beheizbare Medienleitung nach Anspruch 4, dadurch gekennzeichnet, dass die Presshülse (8) an der Außenseite der Abzweigung (4) angeordnet ist und aus Metall, vorzugsweise Edelstahl oder Messing, besteht. 5. Heated media line according to claim 4, characterized in that the compression sleeve (8) on the outside of the branch (4) is arranged and made of metal, preferably stainless steel or brass.
6. Beheizbare Medienleitung nach einem der Ansprüche 1 bis 5, dadurch gekennzeich- net, dass der Widerstandsheizdraht (2) mit einer Kunststoffummantelung (9) versehen ist. 6. Heated media line according to one of claims 1 to 5, characterized marked, that the Widerstandsheizdraht (2) is provided with a plastic sheath (9).
7. Beheizbare Medienleitung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Widerstandsheizdraht (2) innerhalb der Schlauchleitung (1) spiralförmig gewickelt ist. 7. Heated media line according to one of claims 1 to 6, characterized in that the Widerstandsheizdraht (2) within the hose line (1) is wound spirally.
8. Beheizbare Medienleitung nach Anspruch 7, dadurch gekennzeichnet, dass die Länge des Widerstandsheizdrahts (2) im Bereich des inneren Hohlraums der Schlauchleitung (1 ) 3 bis 5 Mal so groß wie die Gesamtlänge (L) der Spiralwicklungen (13) ist. 8. A heatable media line according to claim 7, characterized in that the length of the Widerstandsheizdrahts (2) in the region of the inner cavity of the hose (3) is 3 to 5 times as large as the total length (L) of the spiral windings (13).
9. Beheizbare Medienleitung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Widerstandsheizdraht innerhalb der Schlauchleitung schlaufenförmig geführt ist, wobei eine Schlaufe durch eine entsprechende Wickeltechnik eine Spiralwicklung bildet. 9. Heated media line according to claim 7 or 8, characterized in that the Widerstandsheizdraht is guided loop-shaped within the hose, wherein a loop forms a spiral winding by a corresponding winding technique.
10. Beheizbare Medienleitung nach Anspruch 9, dadurch gekennzeichnet, dass zwei 10. Heated media line according to claim 9, characterized in that two
schlaufenförmige Spiralwicklungen vorgesehen sind, die sich ausgehend von der Abzweigung in beide Richtungen der Schlauchleitung erstrecken.  loop-shaped spiral windings are provided which extend from the branch in both directions of the hose.
11. Brennstoffzellenanlage mit einer beheizbaren Medienleitung nach einem der Ansprü- che 1 bis 10. 11. Fuel cell system with a heatable media line according to one of claims 1 to 10.
EP11720292.9A 2010-06-02 2011-05-10 Heatable media line, in particular for process media of a fuel cell system, and fuel cell system Withdrawn EP2577782A1 (en)

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DE202010007529U DE202010007529U1 (en) 2010-06-02 2010-06-02 Heatable media line, in particular for process media of a fuel cell system, and fuel cell systems
PCT/EP2011/002315 WO2011151008A1 (en) 2010-06-02 2011-05-10 Heatable media line, in particular for process media of a fuel cell system, and fuel cell system

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