EP2583034A1 - Heat exchanger - Google Patents

Heat exchanger

Info

Publication number
EP2583034A1
EP2583034A1 EP11802857.0A EP11802857A EP2583034A1 EP 2583034 A1 EP2583034 A1 EP 2583034A1 EP 11802857 A EP11802857 A EP 11802857A EP 2583034 A1 EP2583034 A1 EP 2583034A1
Authority
EP
European Patent Office
Prior art keywords
plastic
heat exchanger
polypropylene
air
exchanger according
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Withdrawn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
EP11802857.0A
Other languages
German (de)
French (fr)
Inventor
Jürgen RÖBEN
Ralph Berger
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.)
Menerga GmbH
Original Assignee
Menerga 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 Menerga GmbH filed Critical Menerga GmbH
Publication of EP2583034A1 publication Critical patent/EP2583034A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
    • F28D17/02—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F2012/008—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air cyclic routing supply and exhaust air
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56—Heat recovery units

Definitions

  • the invention relates to an air-to-air heat exchanger as a regenerator with at least one stationary or movable storage mass, which is alternately flowed through by outside air and exhaust air to heat or cool the supply air conditioned buildings and thus when heating or cooling
  • the object of the invention is to provide an air-to-air heat exchanger, the low at high heat storage capacity and ease of production
  • a heat exchanger made of plastic, in particular polypropylene has a higher heat storage capacity than aluminum in terms of its mass or weight. With the same weight, the heat storage capacity is even twice as large as that of aluminum.
  • the density of polypropylene is only about one-third of that of aluminum, so although polypropylene requires a larger volume for the same performance, it also provides a larger surface area for heat energy absorption and release.
  • polypropylene has the essential advantage of freedom from corrosion and simple and inexpensive production of different structures of the storage mass in heat exchangers.
  • the storage mass is composed of mutually parallel spaced-apart plastic, in particular polypropylene slats through whose interstices the air flows.
  • plastic / polypropylene wave plates, hollow plates and / or double-skin plates form. In this case, at least every second polypropylene lamella can be wavy.
  • plastic in particular polypropylene lamellae and / or the plastic / polypropylene shaft material a
  • the lamellae and / or the plastic / polypropylene shaft material may have a material thickness of 0.15 mm. It is also proposed that the wave height is 2 to 4 mm. Preferably, the wave height can be 3 mm.
  • two stationary plastic / polypropylene storage masses are arranged as two accumulators parallel to each other, are alternately supported by the outside air and exhaust air.
  • each accumulator has two or more storage packages made of plastic / polypropylene lamellae.
  • the air-to-air heat exchanger (regenerator) has at least one
  • Heat storage accumulator which is alternately flowed through by warm and cold air.
  • the storage mass is fixed or at
  • two stationary heat exchangers each with two or more storage masses (accumulators) are arranged parallel to each other, which are alternately flowed through by warm and cold air.
  • Both heat exchangers have at least one preferably two or more memory masses made of plastic, preferably made of polypropylene, connected one behind the other.
  • Each storage mass is composed of plastic / polypropylene lamellae which form gap-shaped intermediate spaces between which the air flows.
  • each storage mass of wave plates, hollow panels and / or double-wall sheets
  • Wavy plastic / polypropylene lamellae preferably alternate with flat planar plastic / polypropylene lamellae.
  • the material of the slats and in particular the waves have a

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Dispersion Chemistry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention relates to an air-air heat exchanger as a regenerator, having at least one positionally fixed or movable storage mass through which alternately outside air and exhaust air flows in order to heat or cool the supply air of air-conditioned buildings and thereby save energy during the heating or cooling of interior spaces, wherein the storage mass has plastic, in particular propylene or is composed of plastic, in particular propylene.

Description

Wärme ü be rtrage r  Heat transfer r
Die Erfindung betrifft einen Luft-Luft-Wärmeübertrager als Regenerator mit mindestens einer ortsfesten oder beweglichen Speichermasse, die abwechselnd von Außenluft und Fortluft durchströmt wird, um die Zuluft klimatisierter Gebäude zu erwärmen oder zu kühlen und damit beim Erwärmen oder Kühlen von The invention relates to an air-to-air heat exchanger as a regenerator with at least one stationary or movable storage mass, which is alternately flowed through by outside air and exhaust air to heat or cool the supply air conditioned buildings and thus when heating or cooling
Innenräumen Energie einzusparen. Indoor energy saving.
Es sind Luft-Luft-Wärmeübertrager mit Lamellen aus Aluminium bekannt. There are known air-to-air heat exchangers with fins made of aluminum.
Material und Herstellung dieser Wärmeübertrager sind kostenaufwendig. Zudem führt das Material zu einem unerwünschten Gewicht, wenn auch Aluminium zu den leichtesten Metallen zählt. Eine hohe Wärmespeicherkapazität kann aber nur bei einer hohen Masse erreicht werden und ein Aluminium-Wärmespeicher führt z. B. auf dem Dach großer, zu kühlender Industriehallen zu einer erheblichen Belastung. Material and production of these heat exchangers are expensive. In addition, the material leads to an undesirable weight, although aluminum is one of the lightest metals. However, a high heat storage capacity can only be achieved with a high mass and an aluminum heat storage leads z. B. on the roof of large, industrial halls to be cooled to a considerable burden.
Aufgabe der Erfindung ist es, einen Luft-Luft-Wärmeübertrager zu schaffen, der bei hoher Wärmespeicherkapazität und einfacher Herstellung niedrige The object of the invention is to provide an air-to-air heat exchanger, the low at high heat storage capacity and ease of production
Druckverluste aufweist und bei niedrigem Gewicht preiswert ist. Has pressure losses and low in weight is inexpensive.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Speichermasse Kunststoff, insbesondere Polypropylen aufweist oder aus Kunststoff, This object is achieved in that the storage mass plastic, in particular polypropylene or plastic,
insbesondere Polypropylen besteht. Ein Wärmeübertrager aus Kunststoff, insbesondere Polypropylen hat in Bezug auf seine Masse bzw. sein Gewicht eine höhere Wärmespeicherkapazität als Aluminium. Bei gleichem Gewicht ist die Wärmespeicherkapazität sogar doppelt so groß wie die von Aluminium. Die Dichte von Polypropylen beträgt nur ca. ein Drittel von Aluminium, so dass Polypropylen zwar ein größeres Volumen für dieselbe Leistung benötigt, aber hierbei auch eine größere Oberfläche zur Aufnahme und Abgabe von Wärmeenergie bildet. in particular polypropylene. A heat exchanger made of plastic, in particular polypropylene has a higher heat storage capacity than aluminum in terms of its mass or weight. With the same weight, the heat storage capacity is even twice as large as that of aluminum. The density of polypropylene is only about one-third of that of aluminum, so although polypropylene requires a larger volume for the same performance, it also provides a larger surface area for heat energy absorption and release.
Neben dem geringeren Gewicht hat Polypropylen bei Wärmeübertragern den wesentlichen Vorteil der Korrosionsfreiheit und einfacher und preiswerter Herstellung unterschiedlichster Strukturen der Speichermasse. In addition to the lower weight, polypropylene has the essential advantage of freedom from corrosion and simple and inexpensive production of different structures of the storage mass in heat exchangers.
Vorzugsweise wird vorgeschlagen, dass die Speichermasse aus zueinander parallelen beabstandeten Kunststoff-, insbesondere Polypropylen-Lamellen zusammengesetzt ist, durch deren Zwischenräume die Luft strömt. Auch kann der Kunststoff/das Polypropylen Wellenplatten, Hohlkammerplatten und/oder Doppelstegplatten bilden. Hierbei kann mindestens jede zweite Polypropylen- Lamelle wellenförmig sein. Preferably, it is proposed that the storage mass is composed of mutually parallel spaced-apart plastic, in particular polypropylene slats through whose interstices the air flows. Also, the plastic / polypropylene wave plates, hollow plates and / or double-skin plates form. In this case, at least every second polypropylene lamella can be wavy.
Auch wird vorgeschlagen, dass die Kunststoff-, insbesondere Polypropylen- Lamellen und/oder das Kunststoff-/Polypropylen-Wellenmaterial eine It is also proposed that the plastic, in particular polypropylene lamellae and / or the plastic / polypropylene shaft material a
Materialstärke von 0,1 bis 0,3 mm aufweist. Hierbei können die Lamellen und/oder das Kunststoff-/Polypropylen-Wellenmaterial eine Materialstärke von 0,15 mm aufweisen. Ferner wird vorgeschlagen, dass die Wellenhöhe 2 bis 4 mm beträgt. Vorzugsweise kann die Wellenhöhe 3 mm betragen. Material thickness of 0.1 to 0.3 mm. In this case, the lamellae and / or the plastic / polypropylene shaft material may have a material thickness of 0.15 mm. It is also proposed that the wave height is 2 to 4 mm. Preferably, the wave height can be 3 mm.
Bei einer vorteilhaften Ausführung sind zwei ortsfeste Kunststoff-/Polypropylen- Speichermassen als zwei Akkumulatoren zueinander parallel angeordnet, durch die Außenluft und Fortluft wechselweise gefördert werden. Hierbei weist jeder Akkumulator zwei oder mehr Speicherpakete aus Kunststoff-/Polypropylen- Lamellen auf. In an advantageous embodiment, two stationary plastic / polypropylene storage masses are arranged as two accumulators parallel to each other, are alternately supported by the outside air and exhaust air. In this case, each accumulator has two or more storage packages made of plastic / polypropylene lamellae.
Ausführungsbeispiele der Erfindung werden im Folgenden näher beschrieben. Der Luft-Luft-Wärmeübertrager (Regenerator) weist mindestens eine Embodiments of the invention will be described in more detail below. The air-to-air heat exchanger (regenerator) has at least one
Speichermasse aus Kunststoff, insbesondere aus Polypropylen als Storage mass of plastic, in particular of polypropylene as
Wärmespeicher-Akkumulator auf, die abwechselnd von warmer und kalter Luft durchströmt wird. Die Speichermasse ist ortsfest oder beim Heat storage accumulator, which is alternately flowed through by warm and cold air. The storage mass is fixed or at
Rotationswärmeübertrager beweglich. Rotary heat exchanger movable.
In einer bevorzugten Ausführung sind zwei ortsfeste Wärmeübertrager mit jeweils zwei oder mehr Speichermassen (Akkumulatoren) parallel nebeneinander angeordnet, die abwechselnd von warmer und kalter Luft durchströmt werden. Während einer kurzen Zeitspanne von 20 bis 60 Sekunden insbesondere von 40 Sekunden wird der erste Wärmeübertrager von warmer Abluft aus einem In a preferred embodiment, two stationary heat exchangers, each with two or more storage masses (accumulators) are arranged parallel to each other, which are alternately flowed through by warm and cold air. During a short period of 20 to 60 seconds, in particular of 40 seconds, the first heat exchanger of warm exhaust air from a
Gebäude durchströmt und aufgewärmt, während der zweite Wärmeübertrager von kühler Außenluft durchströmt wird, die von dem zweiten Wärmeübertrager erwärmt wird, um danach als Zuluft in das Gebäude zu gelangen. Danach werden die beiden Luftströme umgeschaltet und der erste Wärmeübertrager erwärmt die Außenluft und der zweite Wärmeübertrager wird durch die Abluft erwärmt. Flows through the building and warmed up, while the second heat exchanger is flowed through by cool outside air, which is heated by the second heat exchanger to then arrive as supply air into the building. Thereafter, the two air streams are switched and the first heat exchanger heats the outside air and the second heat exchanger is heated by the exhaust air.
Beide Wärmeübertrager weisen mindestens eine vorzugsweise zwei oder mehr hintereinander geschaltete Speichermassen aus Kunststoff, vorzugsweise aus Polypropylen auf. Hierbei ist jede Speichermasse aus Kunststoff-/Polypropylen- Lamellen zusammengesetzt, die miteinander spaltförmige Zwischenräume bilden, zwischen denen die Luft hindurchströmt. Hierbei ist jede Speichermasse aus Wellenplatten, Hohlkammerplatten und/oder Doppelstegplatten Both heat exchangers have at least one preferably two or more memory masses made of plastic, preferably made of polypropylene, connected one behind the other. Each storage mass is composed of plastic / polypropylene lamellae which form gap-shaped intermediate spaces between which the air flows. Here, each storage mass of wave plates, hollow panels and / or double-wall sheets
zusammengesetzt. Vorzugsweise wechseln wellenförmige Kunststoff- /Polypropylen-Lamellen mit flachen ebenen Kunststoff-/Polypropylen-Lamellen ab. composed. Wavy plastic / polypropylene lamellae preferably alternate with flat planar plastic / polypropylene lamellae.
Das Material der Lamellen und insbesondere der Wellen weisen eine The material of the slats and in particular the waves have a
Materialstärke von 0,1 bis 0,3 mm insbesondere von 0,15 mm auf, wobei die Wellenhöhe 2 bis 4 mm vorzugsweise 3 mm beträgt. Material thickness of 0.1 to 0.3 mm, in particular of 0.15 mm, wherein the wave height is 2 to 4 mm, preferably 3 mm.
Unter anderem werden durch einen solchen Luft-Luft-Wärmeübertrager folgende Vorteile erreicht: - Eine Reduzierung des Speichergewichtes um ca. 48 %. Among other things, the following advantages are achieved by such an air-to-air heat exchanger: - A reduction of the storage weight by about 48%.
- Eine Vergrößerung der Wirkoberfläche des Speichers um ca. 90 % bei gleicher Wärmespeicherkapazität.  - An increase in the effective surface of the memory by about 90% with the same heat storage capacity.

Claims

Ansprüche claims
1. Luft-Luft-Wärmeübertrager als Regenerator mit mindestens einer 1. Air-to-air heat exchanger as a regenerator with at least one
ortsfesten oder beweglichen Speichermasse, die abwechselnd von Außenluft und Fortluft durchströmt wird, um die Zuluft klimatisierter Gebäude zu erwärmen oder zu kühlen und damit beim Erwärmen oder Kühlen von Innenräumen Energie einzusparen, dadurch  stationary or movable storage mass, which is alternately flowed through by outside air and exhaust air to heat the supply air of air-conditioned buildings or cool and thus save energy when heating or cooling of interiors, characterized
gekennzeichnet, dass die Speichermasse Kunststoff, insbesondere Polypropylen aufweist oder aus Kunststoff,  characterized in that the storage mass comprises plastic, in particular polypropylene or plastic,
insbesondere Polypropylen besteht.  in particular polypropylene.
2. Wärmeübertrager nach Anspruch 1, dadurch 2. Heat exchanger according to claim 1, characterized
gekennzeichnet, dass die Speichermasse aus zueinander parallelen beabstandeten Kunststoff-/Polypropylen-Lamellen  characterized in that the storage mass of mutually parallel spaced plastic / polypropylene slats
zusammengesetzt ist, durch deren Zwischenräume die Luft strömt.  is composed, through whose spaces the air flows.
3. Wärmeübertrager nach Anspruch 1 oder 2, dadurch 3. Heat exchanger according to claim 1 or 2, characterized
gekennzeichnet, dass der Kunststoff/das Polypropylen Wellenplatten, Hohlkammerplatten und/oder Doppelstegplatten bildet.  in that the plastic / polypropylene forms wave plates, hollow chamber plates and / or double skin plates.
4. Wärmeübertrager nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass mindestens jede zweite Kunststoff- /Polypropylen-Lamelle wellenförmig ist. 4. Heat exchanger according to one of the preceding claims, characterized in that at least every second plastic / polypropylene lamella is wavy.
5. Wärmeübertrager nach einem der Ansprüche 2 bis 4, d a d u r c h 5. Heat exchanger according to one of claims 2 to 4, d a d u r c h
gekennzeichnet, dass die Kunststoff-/Polypropylen-Lamellen und/oder das Kunststoff-/Polypropylen-Wellenmaterial eine  in that the plastic / polypropylene lamellae and / or the plastic / polypropylene shaft material have a
Materialstärke von 0,1 bis 0,3 mm aufweist. Material thickness of 0.1 to 0.3 mm.
6. Wärmeübertrager nach einem der Ansprüche 2 bis 5, d a d u r c h gekennzeichnet, dass die Lamellen und/oder das Kunststoff- /Polypropylen-Wellenmaterial eine Materialstärke von 0,15 mm aufweist. 6. Heat exchanger according to one of claims 2 to 5, characterized in that the fins and / or the plastic / polypropylene shaft material has a material thickness of 0.15 mm.
7. Wärmeübertrager nach einem der Ansprüche 3 bis 6, d a d u r c h gekennzeichnet, dass die Wellenhöhe 2 bis 4 mm beträgt. 7. Heat exchanger according to one of claims 3 to 6, d a d u r c h characterized in that the wave height is 2 to 4 mm.
8. Wärmeübertrager nach einem der Ansprüche 2 bis 6, d a d u r c h gekennzeichnet, dass die Wellenhöhe 3 mm beträgt. 8. Heat exchanger according to one of claims 2 to 6, d a d u r c h characterized in that the wave height is 3 mm.
9. Wärmeübertrager nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass zwei ortsfeste Kunststoff- /Polypropylen-Speichermassen als zwei Akkumulatoren zueinander parallel angeordnet sind, durch die Außenluft und Fortluft 9. Heat exchanger according to one of the preceding claims, characterized in that two stationary plastic / polypropylene storage masses are arranged as two accumulators parallel to each other, by the outside air and exhaust air
wechselweise gefördert werden.  be sponsored alternately.
10. Wärmeübertrager nach Anspruch 9, dadurch 10. Heat exchanger according to claim 9, characterized
gekennzeichnet, dass jeder Akkumulator zwei oder mehr Speicherpakete aus Kunststoff-/Polypropylen-Lamellen aufweist.  characterized in that each accumulator has two or more storage packages made of plastic / polypropylene slats.
EP11802857.0A 2011-02-14 2011-12-14 Heat exchanger Withdrawn EP2583034A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011011181A DE102011011181A1 (en) 2011-02-14 2011-02-14 Heat exchanger
PCT/EP2011/006291 WO2012110071A1 (en) 2011-02-14 2011-12-14 Heat exchanger

Publications (1)

Publication Number Publication Date
EP2583034A1 true EP2583034A1 (en) 2013-04-24

Family

ID=45440474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11802857.0A Withdrawn EP2583034A1 (en) 2011-02-14 2011-12-14 Heat exchanger

Country Status (5)

Country Link
US (1) US20130206354A1 (en)
EP (1) EP2583034A1 (en)
DE (1) DE102011011181A1 (en)
RU (1) RU2013114288A (en)
WO (1) WO2012110071A1 (en)

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Publication number Priority date Publication date Assignee Title
SE543027C2 (en) * 2017-10-13 2020-09-29 Flexit Sverige Ab Rotating heat exchanger with improved heat transfer capacity

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Also Published As

Publication number Publication date
RU2013114288A (en) 2014-10-10
US20130206354A1 (en) 2013-08-15
WO2012110071A1 (en) 2012-08-23
DE102011011181A1 (en) 2012-08-16

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