EP0152412A1 - Accumulation plant for heat transfer - Google Patents

Accumulation plant for heat transfer

Info

Publication number
EP0152412A1
EP0152412A1 EP84902515A EP84902515A EP0152412A1 EP 0152412 A1 EP0152412 A1 EP 0152412A1 EP 84902515 A EP84902515 A EP 84902515A EP 84902515 A EP84902515 A EP 84902515A EP 0152412 A1 EP0152412 A1 EP 0152412A1
Authority
EP
European Patent Office
Prior art keywords
profile elements
shaped profile
strip
shaped
plate
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Withdrawn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
EP84902515A
Other languages
German (de)
French (fr)
Inventor
Martin Frauenfeld
Rüdiger VON WEDEL
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.)
Kraftanlagen AG
Original Assignee
Kraftanlagen AG
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 Kraftanlagen AG filed Critical Kraftanlagen AG
Publication of EP0152412A1 publication Critical patent/EP0152412A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F28F21/065—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material the heat-exchange apparatus employing plate-like or laminated conduits
    • 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
    • F28D19/041—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 with axial flow through the intermediate heat-transfer medium
    • F28D19/042—Rotors; Assemblies of heat absorbing masses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2240/00—Spacing means
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/009—Heat exchange having a solid heat storage mass for absorbing heat from one fluid and releasing it to another, i.e. regenerator
    • Y10S165/042—Particular structure of heat storage mass
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S165/00—Heat exchange
    • Y10S165/905—Materials of manufacture

Definitions

  • the invention relates to a storage material for the heat transfer between gas streams in heat exchangers made of spacing, strip-shaped profile elements and a plurality of plate-shaped profile elements serving as storage elements made of heat-resistant plastic, which are assembled to form storage blocks.
  • Profile elements made of polyphenylene oxide or a copolymer of polyphenylene oxide and polystyrene or of polyphenylene oxide-polystyrene polyblends.
  • the invention is based on the object. to further improve the durability of the storage material while at the same time increasing the temperature level.
  • the production of the storage material from the plate and strip-shaped profile elements is to be facilitated.
  • the profile elements are made of polyetherimide. High molecular weight imides are mainly used as temperature resistant in plastics technology
  • Thermosets known. By incorporating ioids with high heat resistance and strength via ether bonds in amorphous polyethers, i.e. higher molecular compounds with numerous ether bonds, polyetheriaids are now available which have thermoplastic properties, i.e. easily form profile elements due to good flowability and melt stability, as well as all for thermoplastics have the usual procedures processed. Both injection molding and extrusion processes can therefore be used for the processing of bar-shaped and plate-shaped profile elements. Due to the high temperature resistance, the Hasset temperatures can be selected between 340 and 425 ° C, preferably around 400 ° C.
  • connection of the spacing strip-shaped and the heat-storing plate-shaped profile elements can then - as in the known storage material - be carried out by ultrasonic welding, with corresponding transitions being provided in the areas to be connected, for example in the form of cross-sections which are triangular in cross section, which after ultrasonic welding are particularly useful result in high strength of the connection.
  • the profile elements can also be bonded to one another to form memory blocks, and in this case there is both a connection of the profile elements by means of adhesive bonding with the aid of adhesives based on polyurethane, silicone, non-aminous epoxy resins or polyamide hot melt adhesive, and also by means of diffusion bonding using a solvent for polyetherimide, preferably methylene chloride in concentrations of 1-5%.
  • a solvent for polyetherimide preferably methylene chloride in concentrations of 1-5%.
  • the parts to be connected are dissolved in the connection area provided for the connection by the solvent and, under pressure, this surface is interlocked. After the solvent has evaporated, a practically monolithic connection of the profile elements is achieved, ie no foreign material with material properties different from the material properties of the profile elements remains in the adhesive seam.
  • the surface areas to be joined must be precisely matched to one another and they must be thoroughly cleaned of grease, oil and dust before bonding, for which isopropyl alcohol is suitable.
  • Adhesive process also plays an important role in the pressure load after joining for a certain period of time for the durability of the intended connection.
  • the memory blocks can be composed of perforated plate-shaped profile elements and strip-shaped profile elements provided with rivet heads, the rivet heads preferably being molded or countersunk by the action of ultrasound.
  • the plate-shaped profile elements are to have a particularly small wall thickness, it may be expedient to reinforce the polyetherimide used for the production by embedded fibers or fiber fabrics, preferably glass fibers or glass fiber fabrics. Fibers up to 10% are possible without losing the elastic properties of the material that are essential for the formation of snap connections.
  • the strip-shaped profile elements are integrally formed on the plate-shaped profile elements.
  • Such integral composite elements can be produced by injection molding or else by extrusion, it being possible for the composite elements to be suitably designed for adhesive or snap connections. For example, a connection is possible by means of webs with widened edges provided on the strip-shaped areas, which are snapped into slots in the plate-shaped areas of the composite elements.
  • the material should be dried to less than 0.05% water content before processing, e.g. by tempering in a drying oven for a certain period of time.
  • the memory blocks made from the strip-shaped and plate-shaped profile elements according to the invention or also from integral composite elements have a high strength against aggressive chemical influences, for example a large number of aliphatic hydrocarbon compounds, mineral acids, as well as salt solutions and aqueous alkalis with a pH value of 9.
  • the memory blocks show high dimensional stability and sufficient creep resistance even over longer periods of stress at higher working temperatures up to 170oC.
  • Fig. 1 is a perspective view of a
  • FIG. 2 shows a sectional view through a stack of strip-shaped and plate-shaped profile elements which are suitably designed for a snap connection, with a cut made in the longitudinal direction of the strip-shaped profiles in the direction of arrows 2-2 in FIG. 31
  • Fig. 3 is a sectional view taken along arrows 3-3 in Fig. 2;
  • FIG. 4 shows a profile element stack produced by snap connections with profile elements modified compared to the profile elements used in FIGS. 2 and 3 in a sectional view corresponding to the sectional view of FIG. 2; 5 shows a section corresponding to the sectional view of FIGS. 2 and 4 through a stack of strip-shaped and plate-shaped profile elements which are suitably designed for an adhesive connection.
  • Fig. 6 is a sectional view seen in the direction of arrows 6-6 in Fig. 5;
  • Fig. 7 in the sectional view of Fig. 6 speaking speaking section through a profile element stack, in which the strip-shaped profile elements with the plate-shaped profile elements produced by riveting with by ultrasonic forming
  • Rivet heads are connected
  • FIG. 7 shows a corresponding sectional view through a stack of composite elements with strip-shaped profile elements molded integrally on the plate-shaped profile elements.
  • FIG. 1 seven plate-shaped profile elements 10 are alternately connected to one another in three rows one above the other by ultrasound welding, in alternation with spacing strip-shaped profiles.
  • the next following position of the spacing strip-shaped profiles 12 has already been placed on the uppermost profile element 10 of the plate stack.
  • the spacing profile elements 12 are the spacing profile elements 12 on both sides, that is to say also on the underside not visible in the drawing, with the axially extending, cross-sectionally triangular webs 14 for linear welded connections on the one hand and annular ones Provided webs 16 for spot welds on the other hand.
  • the next following plate-shaped profile element 10 is placed on the uppermost layer of the spacing strip-shaped profile element 12.
  • the ultrasonic welding is thus carried out step-by-step at the same time by means of a remote welding connecting the underside of the strip-shaped profile elements 12 to the plate-shaped profile element 10 located underneath, and by means of a near-end welding for connecting their upper side to the plate-shaped profile element still to be placed on them.
  • the spacing strip-shaped profile elements are provided in the area of the intended point weld connections in plan view with rounded circular widenings, so that particularly resilient, button-like connection areas are designed in these areas.
  • the straight end edges of the plate-shaped profile elements shown on the right in the drawing lie in the later entry flat of the dust-laden gases, the direction of flow of which may be symbolized by the arrow G.
  • the cleaning jets of a soot blower also act in the same direction, the direction of action of which may be illustrated by the arrow B.
  • the spacing strip-shaped profiles 12 are provided with widenings set back with respect to the aforementioned entry surface with the webs 16 which are circular in shape for the point-shaped ultrasonic welded connections.
  • shorter triangular webs 18, which are also triangular in cross section, are provided in relation to the other triangular webs 14 running in the longitudinal direction of the strip-shaped profiles for producing the linear welded connections, which serve only as an assembly aid. They fix the stack of profile elements or the storage block in the area of the relevant end face and prevent deformation there due to the step-by-step ultrasound welding during the production of the storage block from the plate-shaped and the strip-shaped profile elements. In later operation, the welded connections made with the webs 18 can then break open, so that the plate-shaped profile elements 10 form an oscillating entry section in the area of the entry surface. In the stack shown in FIGS.
  • the plate-shaped profile elements 10 are connected by latching to the strip-shaped profile elements 12, for which purpose pins 20 with a thickened head protrude from the opposite flat parts of the strip-shaped profile elements 12 at regular intervals, which slide into assigned bores 22 in the Profile elements 10 are engaged.
  • the pins 20 face each other on the top and bottom of the strip-shaped profile elements 12, as can be seen in FIG. 2.
  • the strip-shaped profile elements 12 between successive plate-shaped profile elements 10 are each offset by the amount of the spacing between adjacent bores 22 in the profile elements 10.
  • the strip-shaped profile elements 12 also again have pins 20 with a thickened head, which are snapped into the associated bore 22 in the plate-shaped profile elements 10, but the pins 20 on opposite sides of the strip-shaped profile elements, but at a distance have, which is equal to twice the distance between adjacent bores 22 in the plate-shaped profile elements, and the pins 20 on the top and bottom of the profile elements 12 are each offset by the amount of the hole spacing of adjacent bores 22 in the profile elements 10.
  • FIGS. 5 and 6 show a stack of profile elements constructed similarly to the Profilierneuten stack according to FIGS. 2 and 3, in which the profile elements 10 and 12 are however not locked together, but are connected by gluing.
  • Elongated web projections 24 are integrally formed on the strip-shaped profile elements, which engage in corresponding slots 26.
  • the web projections are inserted into the slots 26 during assembly with an adhesive, or the surfaces that come into contact with one another in the slots are loosened with a solvent before the assembly of the respective panel-shaped profile element 10. After the solvent has evaporated, the web projections 24 are then connected practically monolithically to the facing walls of the slot 26.
  • FIG. 7 shows a connection method of the strip-shaped profile element 12 with the plate-shaped profile elements 10, in which, in turn, projecting, cross-sectionally circular pins 28 are inserted from the opposite flat sides of the strip-shaped profile elements 12 into associated bores 30 in the plate-shaped profile elements 10.
  • the fixing of the pin 28 in the bores 30 is carried out by forming rivet heads 32 on the free ends of the nozzle by reshaping these ends of the pins with ultrasound.
  • FIG. 8 finally shows a stack of composite elements 32, in which the strip-shaped profile elements are practically integrally formed on the plate-shaped profile elements 10.
  • different strip-shaped profile elements 34, 36 are provided, one of which has a relatively narrow profile element 34 at the free end is a bar with a circular thickened cross section, while the second profile element 36 is designed as a wider bar with a longitudinal groove complementary to the profile element 34.
  • the profile elements 34 of the one composite element 32 can thus be snapped into the profile elements 36 of the next composite element 32 in the stack.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)

Abstract

L'équipement d'accumulation est conçu pour le transfert de chaleur entre flux de gaz dans des échangeurs thermiques et possède, d'une part, des éléments écarteurs profilés allongés (12) et, d'autre part, plusieurs éléments profilés plats (10) en plastique thermostable servant d'éléments d'accumulation, les éléments profilés étant assemblés pour former des blocs d'accumulation. Les éléments profilés (10, 12) sont en polyétherimide, un matériau alliant une bonne résistance aux températures à une résistance mécanique et à une résistance aux attaques chimiques.The storage equipment is designed for heat transfer between gas streams in heat exchangers and has, on the one hand, elongated profiled spacer elements (12) and, on the other hand, several flat profiled elements (10 ) of thermostable plastic serving as accumulation elements, the profiled elements being assembled to form accumulation blocks. The profiled elements (10, 12) are made of polyetherimide, a material combining good temperature resistance with mechanical strength and resistance to chemical attack.

Description

Speichermaterial für Wärmeübertragung Storage material for heat transfer
Die Erfindung betrifft ein Speichermaterial für die Wärmeübertragung zwischen Gasströmen in Wärmetauschern aus abstandshaltenden, leistenförmigen Profilelementen und mehreren, als Speieherelemente dienende plattenförmigen Profilelementen aus wärmebeständigem Kunststoff, die zu Speicherblöcken zusammengesetzt sind.The invention relates to a storage material for the heat transfer between gas streams in heat exchangers made of spacing, strip-shaped profile elements and a plurality of plate-shaped profile elements serving as storage elements made of heat-resistant plastic, which are assembled to form storage blocks.
Bin derartiges Speichermaterial ist aus der DE-A 32 07 213 bekannt. Dabei sind die abstandshaltenden, leistenförmigen und die wärmespeichernden, plattenförmigenSuch storage material is known from DE-A 32 07 213. The spacing, strip-shaped and the heat-storing, plate-shaped
Profilelemente aus Polyphenylenoxid oder einem Copolymerisat aus Polyphenylenoxid und Polystyrol oder aus Polyphenylenoxis-Polystyrol-Polyblends hergestellt.Profile elements made of polyphenylene oxide or a copolymer of polyphenylene oxide and polystyrene or of polyphenylene oxide-polystyrene polyblends.
Demgegenüber liegt der Erfindung die Aufgabe zugrunde. die Dauerbelastbarkeit des Speichermaterials bei gleichzeitig erhöhtem Temperaturniveau weiter zu verbessern. Außerdem soll die Herstellung des Speichermaterials aus den platten- und leistenförmigen Profilelementen erleichtert werden. Ausgehend von einem Speichermaterial der eingangs erwähnten Art wird diese Aufgabe dadurch gelöst, daß die Profilelemente aus Polyätherimid hergestellt sind. Hochmolekulare Imide sind in der Kunststofftechnik hauptsächlich als temperaturbeständigeIn contrast, the invention is based on the object. to further improve the durability of the storage material while at the same time increasing the temperature level. In addition, the production of the storage material from the plate and strip-shaped profile elements is to be facilitated. Starting from a storage material of the type mentioned above, this object is achieved in that the profile elements are made of polyetherimide. High molecular weight imides are mainly used as temperature resistant in plastics technology
Duroplaste bekannt. Durch Einarbeitung von Ioiden mit hoher Wärmebeständigkeit und Festigkeit über Ätherbindungen in amorphe Polyäther, d.h. höher molekulare Verbindungen mit zahlreichen Ätherbindungen, stehen nunmehr Polyätheriaide zur Verfügung, die thermoplastische Eigenschaften haben, d.h. sich aufgrund guter Fließfähigkeit und Schmelzstabilität leicht zu Profilelementen formen sowie mit allen für Thermoplaste üblichen Verfahren verarbeiten lassen. Für die Verarbeitung zu leisten- und plattenförmigen Profilelementen können also sowohl Spritzguß- als auch Extrusionsverfahren angewandt werden. Durch die hohe Temperaturbeständigkeit sind die Hassetemperaturen zwischen 340 und 425°C, vorzugsweise etwa bei 400°C, zu wählen. Dabei ist lediglich zu beachten, daß für die Verarbeitung beheizte Werkzeuge eingesetzt werden, deren Oberfläche eine Temperatur zwischen 70º und 170ºC vorzugsweise etwa 95ºC aufweist. Durch die Wahl optimaler Verarbeitungstemperaturen werden durch das bessere Fließverhalten des Werkstoffs optimale Eigenschaften der gefertigten Profilelemente, beispielsweise hohe Festigkeit der Fließnähte sowie hohe Wärme- und Chemikalienbeständigkeit bei optimalen Zykluszeiten trotz des amorphen Werkstoffs erhalten. Die Verbindung der abstandshaltenden leistenförmigen und der wärmespeichernden plattenförmigen Profilelemente kann dann - wie bei dem bekannten Speichermaterial - durch Ultraschallschweißung erfolgen, wobei in den zu verbindenden Bereichen entsprechende Übergänge, beispielsweise in Form von im Querschnitt dreieckförmigen Stegen, vorgesehen werden, welche nach der Ultraschallschweißung eine besonders hohe Festigkeit der Verbindung ergeben.Thermosets known. By incorporating ioids with high heat resistance and strength via ether bonds in amorphous polyethers, i.e. higher molecular compounds with numerous ether bonds, polyetheriaids are now available which have thermoplastic properties, i.e. easily form profile elements due to good flowability and melt stability, as well as all for thermoplastics have the usual procedures processed. Both injection molding and extrusion processes can therefore be used for the processing of bar-shaped and plate-shaped profile elements. Due to the high temperature resistance, the Hasset temperatures can be selected between 340 and 425 ° C, preferably around 400 ° C. It should only be noted that heated tools are used for processing, the surface of which has a temperature between 70 ° and 170 ° C, preferably about 95 ° C. By choosing optimal processing temperatures, the better flow behavior of the material ensures optimal properties of the manufactured profile elements, for example high strength of the flow seams as well as high heat and chemical resistance with optimal cycle times despite the amorphous material. The connection of the spacing strip-shaped and the heat-storing plate-shaped profile elements can then - as in the known storage material - be carried out by ultrasonic welding, with corresponding transitions being provided in the areas to be connected, for example in the form of cross-sections which are triangular in cross section, which after ultrasonic welding are particularly useful result in high strength of the connection.
Alternativ können die Profilelemente auch durch Verklebung miteinander zu Speicherblöcken verbunden werden, und zwar kommt hierbei sowohl eine Verbindung der Profilelemente mittels einer Adhäsionsklebung mit Hilfe von Klebstoffen auf der Basis von Polyurethan, Silicon, nichtaminisehen Epoxydharzen oder Pölyamidschmelzkleber als auch mittels einer Diffusionsklebung unter Verwendung eines Lösungsmittels für Polyätherimid, vorzugsweise Methylenchlorid in Konzentrationen von 1 - 5 % in Frage. Im letztgenannten Fall werden die zu verbindenden Teile in den zur Verbindung vorgesehenen Anschlußbereich durch das Lösungsmittel angelöst und unter Druckauflastung eine Verzahnung dieser Oberfläche ineinander vorgenommen. Nach dem Verdunsten des Lösungs mittels wird so eine praktisch monolithische Verbindung der Profilelemente erreicht, d.h. in der Klebnaht bleibt also kein Fremdmaterial mit von den Werkstoffeigenschaften der Profilelemente unterschiedlichen Werkstoffeigenschaften zurück. Für die Verbindung durch Kleben sind die zu verbindenden Flächenbereiche genau aneinander anzupassen und sie müssen vor der Verklebung gründlich von Fett, öl und Staub gereinigt werden, wozu beispielsweise Isopropylalkohol geeignet ist. Bei allen Klebeverfahren spielt desweiteren die Druckauflastung nach dem Fügen über eine bestimmte Zeitdauer für die Haltbarkeit der vorgesehenen Verbindung eine wesentliche Rolle.Alternatively, the profile elements can also be bonded to one another to form memory blocks, and in this case there is both a connection of the profile elements by means of adhesive bonding with the aid of adhesives based on polyurethane, silicone, non-aminous epoxy resins or polyamide hot melt adhesive, and also by means of diffusion bonding using a solvent for polyetherimide, preferably methylene chloride in concentrations of 1-5%. In the latter case, the parts to be connected are dissolved in the connection area provided for the connection by the solvent and, under pressure, this surface is interlocked. After the solvent has evaporated, a practically monolithic connection of the profile elements is achieved, ie no foreign material with material properties different from the material properties of the profile elements remains in the adhesive seam. For bonding by gluing, the surface areas to be joined must be precisely matched to one another and they must be thoroughly cleaned of grease, oil and dust before bonding, for which isopropyl alcohol is suitable. At all Adhesive process also plays an important role in the pressure load after joining for a certain period of time for the durability of the intended connection.
Unabhängig von solchen Klebeverbindungen der Profilelemente oder aber auch zusätzlich zu solchen Klebeverbindungen, bietet es sich aufgrund der Materialeigenschaften bezüglich ihrer Dehnung bei Streckspannung, ihrer Flexibilität und ihrer Elastizität an, die Frofilelemente in den für die Verbindung vorgesehenen Anschlußbereichen als Schnappverbindung mit knöpfoder leistenartig gestalteten, im Wechsel eingreifenden und übergreifenden Verbindungsgliedern zu versehen.Regardless of such adhesive connections of the profile elements or also in addition to such adhesive connections, it is appropriate due to the material properties with regard to their elongation at yield stress, their flexibility and their elasticity, the Frofilelemente in the connection areas provided for the connection as a snap connection with button or strip-shaped, im To provide interchanging and overlapping connecting links.
Bei einer alternativen Ausgestaltung der Erfindung können die Speieherblocke aus gelochten plattenförmigen Profilelementen und mit Nietköpfen versehenen leistenförmigen Profilelementen zusammengesetzt werden, wobei die Nietköpfe vorzugsweise durch Ultraschalleinwirkung angeformt oder angesenkt sind.In an alternative embodiment of the invention, the memory blocks can be composed of perforated plate-shaped profile elements and strip-shaped profile elements provided with rivet heads, the rivet heads preferably being molded or countersunk by the action of ultrasound.
Insbesondere dann, wenn die plattenförmigen Profilelemente eine besonders geringe Wandstärke aufweisen sollen, kann es zweckmäßig sein, das für die Herstellung verwendete Polyätherimid durch eingelagerte Fasern oder Fasergewebe, vorzugsweise Glasfasern oder Glasfasergewebe zu armieren. Dabei kommen Faseranteile bis zu 10 % in Frage, ohne daß hierbei die für die Ausbildung von Schnappverbindungen wesentlichen elastischen Eigenschaften des Materials verlorengehen. Für die Verbindung zu Speicherblöcken nach einem der oben erwähnten Klebeverfahren kann es schließlich von Vorteil sein, wenn die leistenförmigen Profilelemente einstückig an den plattenförmigen Profilelementen angeformt sind. Dabei kann die Herstellung solcher integraler Verbundelemente durch Spritzgießen oder aber auch durch Extrudieren erfolgen, wobei die Verbundelemente für Klebe- oder Schnappverbindungen geeignet ausgebildet werden können. Beispielsweise ist eine Verbindung durch an den leistenförmigen Bereichen vorgesehene Stege mit verbreitertem Rand möglich, die in Schlitze in den plattenförmigen Bereichen der Verbundelemente eingerastet werden.In particular, if the plate-shaped profile elements are to have a particularly small wall thickness, it may be expedient to reinforce the polyetherimide used for the production by embedded fibers or fiber fabrics, preferably glass fibers or glass fiber fabrics. Fibers up to 10% are possible without losing the elastic properties of the material that are essential for the formation of snap connections. For the connection to memory blocks according to one of the above-mentioned adhesive methods, it can finally be advantageous if the strip-shaped profile elements are integrally formed on the plate-shaped profile elements. Such integral composite elements can be produced by injection molding or else by extrusion, it being possible for the composite elements to be suitably designed for adhesive or snap connections. For example, a connection is possible by means of webs with widened edges provided on the strip-shaped areas, which are snapped into slots in the plate-shaped areas of the composite elements.
Da Polyätherimid innerhalb von 24 Stunden bis zuBecause polyetherimide takes up to 24 hours
0,25 % Wasser aufnimmt, sollte der Werkstoff vor der Verarbeitung auf weniger als 0,05 % Vassergehalt getrocknet werden, z.B. durch eine Temperung in einem Trocknungsofen für eine bestimmte Zeitdauer.Absorbs 0.25% water, the material should be dried to less than 0.05% water content before processing, e.g. by tempering in a drying oven for a certain period of time.
Die aus den erfindungsgemäßen leisten- und plattenförmigen Profilelementen oder auch aus integralen Verbundelementen hergestellten Speicherblöcke besitzen eine hohe Festigkeit gegenüber aggressiven chemischen Einflüssen, z.B. einer großen Zahl aliphatischer Kohlenwasserstoffverbindungen, mineralischen Säuren sowie Salzlösungen und wässrigen Laugen mit einem pH-Wert 9. Außerdem zeigen die Speicherblöcke eine hohe Formbeständigkeit und eine ausreichende Zeitstandfestigkeit auch über längere Belastungszeiten hinweg bei höheren Arbeitstemperaturen bis zu 170ºC. Die Erfindung ist in der folgenden Beschreibung mehrere Ausführungsbeispiele in Verbindung mit der Zeichnung näher erläutert, und zwar zeigt:The memory blocks made from the strip-shaped and plate-shaped profile elements according to the invention or also from integral composite elements have a high strength against aggressive chemical influences, for example a large number of aliphatic hydrocarbon compounds, mineral acids, as well as salt solutions and aqueous alkalis with a pH value of 9. In addition, the memory blocks show high dimensional stability and sufficient creep resistance even over longer periods of stress at higher working temperatures up to 170ºC. The invention is explained in more detail in the following description of several exemplary embodiments in conjunction with the drawing, which shows:
Fig. 1 eine perspektivische Ansicht einesFig. 1 is a perspective view of a
Stapels von durch Ultraschallschweißung verbindbaren leisten- und plattenförmigen Profilelementen bei der Herstellung eines Speicherblocks)Stack of strip-shaped and plate-shaped profile elements that can be connected by ultrasonic welding during the production of a memory block)
Fig. 2 eine Schnittansicht durch einen Stapel von für eine Schnappverbindung geeignet ausgebildeten leisten- und plattenförmigen Profilelementen mit in Längsrichtung der leistenförmigen Profile gelegter Schnittführung in Richtung der Pfeile 2-2 in Fig. 312 shows a sectional view through a stack of strip-shaped and plate-shaped profile elements which are suitably designed for a snap connection, with a cut made in the longitudinal direction of the strip-shaped profiles in the direction of arrows 2-2 in FIG. 31
Fig. 3 eine Schnittansicht, entlang der Pfeile 3-3 in Fig. 2;Fig. 3 is a sectional view taken along arrows 3-3 in Fig. 2;
Fig. 4 einen durch Schnappverbindungen hergestellten Profilelementen-Stapel mit gegenüber den in den Fig. 2 und 3 verwendeten Profilelementen abgewandelten Profilelementen in einer in der Schnittführung der Fig. 2 entsprechenden Schnittansicht; Fig. 5 eine in der Schnittführung der Fig. 2 bzw. 4 entsprechende Schnittansieht durch einen Stapel von für eine Klebeverbindung geeignet ausgebildeten leistenförmigen und plattenförmigen Profilelementen.4 shows a profile element stack produced by snap connections with profile elements modified compared to the profile elements used in FIGS. 2 and 3 in a sectional view corresponding to the sectional view of FIG. 2; 5 shows a section corresponding to the sectional view of FIGS. 2 and 4 through a stack of strip-shaped and plate-shaped profile elements which are suitably designed for an adhesive connection.
Fig. 6 eine Schnittansicht, gesehen in Richtung der Pfeile 6-6 in Fig. 5 ;Fig. 6 is a sectional view seen in the direction of arrows 6-6 in Fig. 5;
Fig. 7 eine in der Schnittführung der Fig. 6 ent sprechende Schnittansieht durch einen Profilelementen-Stapel, bei welchem die leistenförmigen Profilelemente mit den plattenförmigen Profilelementen durch Vernietung mit durch Ultraschallumformung hergestelltenFig. 7 in the sectional view of Fig. 6 speaking speaking section through a profile element stack, in which the strip-shaped profile elements with the plate-shaped profile elements produced by riveting with by ultrasonic forming
Nietköpfen verbunden sind; undRivet heads are connected; and
Fig. 8 eine in der Schnittführung der Fig. 6 oderFig. 8 in the sectional view of Fig. 6 or
7 entsprechende Schnittansieht durch einen Stapel von Verbundelementen mit einstückig an den plattenförmigen Profilelementen angeformten leistenförmigen Profilelementen.7 shows a corresponding sectional view through a stack of composite elements with strip-shaped profile elements molded integrally on the plate-shaped profile elements.
In Figur 1 sind bereits sieben plattenförmige Profilelemente 10 im Wechsel mit abstandhältenden leistenförmigen Profilen 12 in drei Reihen übereinander durch Ultraschallschweißung miteinander verbunden. Auf das oberste Profilelement 10 des Plattenstapels ist bereits die nächstfolgende Lage der abstandshaltenden leistenförmigen Profile 12 aufgesetzt worden. Für die Verschweißung mit dem nächstfolgenden (nicht gezeigten) Profilelement sind die abstandshaltenden Profilelemente 12 beidseitig, d.h. auch auf der in der Zeichnung nicht sichtbaren Unterseite mit den auf ihrer Oberseite dargestellten, sich in axialer Richtung erstreckenden, im Querschnitt dreieckförmigen Stegen 14 für linienförmige Schweißverbindungen einerseits und kreisringförmigen Stegen 16 für punktförmige Schweißverbindungen andererseits versehen. Vor der Ultraschal lschweißung wird zunächst auf die oberste Lage der abstandshaltenden leistenförmigen Profilelement 12 das nächstfolgende plattenförmige Profilelement 10 auf gelegt. Die Ultraschallschweißung erfolgt somit schrittweise zugleich durch eine die Unterseite der leistenförmigen Profilelemente 12 mit dem darunter befindlichen plattenförmigen Profilelement 10 verbindende Femschweißung und durch eine Naheschweißung zur Verbindung ihrer Oberseite mit dem noch auf sie aufzulegenden plattenförmigen Profilelement.In FIG. 1, seven plate-shaped profile elements 10 are alternately connected to one another in three rows one above the other by ultrasound welding, in alternation with spacing strip-shaped profiles. The next following position of the spacing strip-shaped profiles 12 has already been placed on the uppermost profile element 10 of the plate stack. For the Welding with the next following profile element (not shown) are the spacing profile elements 12 on both sides, that is to say also on the underside not visible in the drawing, with the axially extending, cross-sectionally triangular webs 14 for linear welded connections on the one hand and annular ones Provided webs 16 for spot welds on the other hand. Before the ultrasonic welding, the next following plate-shaped profile element 10 is placed on the uppermost layer of the spacing strip-shaped profile element 12. The ultrasonic welding is thus carried out step-by-step at the same time by means of a remote welding connecting the underside of the strip-shaped profile elements 12 to the plate-shaped profile element 10 located underneath, and by means of a near-end welding for connecting their upper side to the plate-shaped profile element still to be placed on them.
Die abstandhaltenden leistenförmigen Profilelemente sind im Bereich der vorgesehenen punktförmigen Schweiß verbindungen in der Draufsicht mit abgerundeten kreisringförmigen Verbreiterungen versehen, so daß in diesen Bereichen besonders belastungsfähige, knopfartige Verbindungsbereiche gestaltet werden. In dem in der Zeichnung dargestellten Ausschnitt des Plattenstapels liegen die in der Zeichnung rechts dargestellten geradlinigen Stirnkanten der plattenförmigen Profilelemente in der späteren Eintritts flache der staubbeladenen Gase, deren Strömungsrichtung durch den Pfeil G symbolisiert sein möge. In gleicher Richtung wirken auch die Reinigungsstrahlen eines Rußbläsers, deren Wirkungsrichtung durch den Pfeil B veranschaulicht sein möge .The spacing strip-shaped profile elements are provided in the area of the intended point weld connections in plan view with rounded circular widenings, so that particularly resilient, button-like connection areas are designed in these areas. In the section of the plate stack shown in the drawing, the straight end edges of the plate-shaped profile elements shown on the right in the drawing lie in the later entry flat of the dust-laden gases, the direction of flow of which may be symbolized by the arrow G. The cleaning jets of a soot blower also act in the same direction, the direction of action of which may be illustrated by the arrow B.
Die abstandhaltenden leistenförmigen Profile 12 sind mit bezüglich der vorerwähnten Eintrittsfläche zurückversetzten Verbreiterungen mit den in der Draufsich kreisringförmigen Stegen 16 für die punktförmigen Ultraschall-Schweißverbindungen versehen.The spacing strip-shaped profiles 12 are provided with widenings set back with respect to the aforementioned entry surface with the webs 16 which are circular in shape for the point-shaped ultrasonic welded connections.
Unmittelbar an die Eintrittsfläche angrenzend sind gegenüber den anderen in Längsrichtung der leistenförmigen Profile verlaufenden dreieekförmigen Stege 14 zur Herstellung der linienförmigen SchweißverbdLndungen kürzere, im Querschnitt ebenfalls dreieckförmige Stege 18 vorgesehen, die allein als Montagehilfe dienen. Sie fixieren den Profilelementanstapel bzw. den Speicherblock im Bereich der betreffenden Stirnseite und vermeiden dort eine Verformung aufgrund der schrittweise durchgeführten Ultraschallschweißung während der Herstellung des Speicherblocks aus den plattenförmigen und den leistenförmigen Profilelementen. Im späteren Betrieb können die mit den Stegen 18 hergestellten Schweißverbindungen dann aufbrechen, so daß die plattenförmigen Profilelemente 10 im Bereich der Eintrittsfläche einen schwingungsfähigen Eintrittsabschnitt bilden. Bei dem in den Figuren 2 und 3 gezeigten Stapel sind die plattenförmigen Profilelemente 10 durch Verrastung mit den leistenföxmigen Profilelementen 12 verbunden, wofür von den gegenüberliegenden Flachselten der leistenförmigen Profilelemente 12 in regelmäßigen Abständen Zapfen 20 mit verdicktem Kopf vorspringen, die in zugeordnete Bohrungen 22 in den Profilelementen 10 eingerastet sind. Die Zapfen 20 stehen sich dabei auf der Ober- und der Unterseite der leistenförmigen Profilelemente 12 gegenüber, wie in Fig. 2 erkennbar ist. Dagegen sind die leistenförmigen Profilelemente 12 zwischen aufeinanderfolgenden plattenförmigen Profilelementen 10 Jeweils um das Maß des Abstände benachbarter Bohrungen 22 in den Profilelementen 10 zueinander versetzt.Immediately adjacent to the entry surface, shorter triangular webs 18, which are also triangular in cross section, are provided in relation to the other triangular webs 14 running in the longitudinal direction of the strip-shaped profiles for producing the linear welded connections, which serve only as an assembly aid. They fix the stack of profile elements or the storage block in the area of the relevant end face and prevent deformation there due to the step-by-step ultrasound welding during the production of the storage block from the plate-shaped and the strip-shaped profile elements. In later operation, the welded connections made with the webs 18 can then break open, so that the plate-shaped profile elements 10 form an oscillating entry section in the area of the entry surface. In the stack shown in FIGS. 2 and 3, the plate-shaped profile elements 10 are connected by latching to the strip-shaped profile elements 12, for which purpose pins 20 with a thickened head protrude from the opposite flat parts of the strip-shaped profile elements 12 at regular intervals, which slide into assigned bores 22 in the Profile elements 10 are engaged. The pins 20 face each other on the top and bottom of the strip-shaped profile elements 12, as can be seen in FIG. 2. In contrast, the strip-shaped profile elements 12 between successive plate-shaped profile elements 10 are each offset by the amount of the spacing between adjacent bores 22 in the profile elements 10.
Bei dem in Fig. 4 gezeigten Profilelementen-Stapel weisen die leistenförmigen Profilelemente 12 ebenfalls wieder Zapfen 20 mit verdicktem Kopf auf, die in zugeordneter Bohrung 22 in den plattenförmigen Profilelementen 10 eingerastet werden, wobei die Zapfen 20 auf gegenüberliegenden Seiten der leistenförmigen Profilelemente aber einen Abstand haben, der gleich dem doppelten Abstand benachbarter Bohrungen 22 in den plattenförmigen Profilelementen ist, und die Zapfen 20 auf der Ober- und Unterseite der Profilelemente 12 Jeweils um das Maß des Lochabstands benachbarter Bohrungen 22 in den Profilelementen 10 zueinander versetzt sind. Dadurch ist es möglich, die leistenförmigen Profilelemente 12 ohne seitliche Versetzung zwischen aufeinanderfolgenden Profilelementen 10 ähnlich wie beim Plattenstapel gemäß Fig. 1 in Reihen übereinander anzuordnen.In the stack of profile elements shown in FIG. 4, the strip-shaped profile elements 12 also again have pins 20 with a thickened head, which are snapped into the associated bore 22 in the plate-shaped profile elements 10, but the pins 20 on opposite sides of the strip-shaped profile elements, but at a distance have, which is equal to twice the distance between adjacent bores 22 in the plate-shaped profile elements, and the pins 20 on the top and bottom of the profile elements 12 are each offset by the amount of the hole spacing of adjacent bores 22 in the profile elements 10. This makes it possible to make the strip-shaped profile elements 12 without lateral To arrange dislocation between successive profile elements 10 similar to the stack of plates according to FIG. 1 in rows one above the other.
Die Figuren 5 und 6 zeigen einen dem Profileierneuten- Stapel gemäß den Figuren 2 und 3 ähnlich aufgebauten Profilelementen-Stapel, bei dem die Profilelemente 10 und 12 Jedoch nicht miteinander verrastet, sondern durch Klebung verbunden sind, Anstelle von Zapfen 20 mit kreisförmigem Querschnitt sind an den leistenförmigen Profilelementen längliche Stegvorsprünge 24 angeformt, welche in zugeordnete Schlitze 26 passend eingreifen. Zu Verbindungen der Profilelemente 10 und 12 werden die Stegvorsprünge bei der Montage mit einem Kleber in die Schlitze 26 eingesetzt oder die in den Schlitzen aneinander zur Anlage kommenden Flächen werden vor der Montage des Jeweiligen plattenförmigen Profilelements 10 mit einem Lösungamittel angelöst. Nach Verflüchtigung des Lösungsmittels sind die StegvorSprünge 24 dann praktisch monolithisch mit den zugewandten Wänden der Schlitz 26 verbunden.FIGS. 5 and 6 show a stack of profile elements constructed similarly to the Profilierneuten stack according to FIGS. 2 and 3, in which the profile elements 10 and 12 are however not locked together, but are connected by gluing. Instead of pins 20 with a circular cross-section there are Elongated web projections 24 are integrally formed on the strip-shaped profile elements, which engage in corresponding slots 26. To connect the profile elements 10 and 12, the web projections are inserted into the slots 26 during assembly with an adhesive, or the surfaces that come into contact with one another in the slots are loosened with a solvent before the assembly of the respective panel-shaped profile element 10. After the solvent has evaporated, the web projections 24 are then connected practically monolithically to the facing walls of the slot 26.
In Fig. 7 Ist eine Verbindungsmethode der leistenförmigen Profilelement 12 mit den plattenförmigen Profilelementen 10 veranschaulicht, bei denen wiederum von den gegenüberliegenden Flachseiten der leistenförmigen Profilelemente 12 vorspringende, im Querschnitt kreisförmige Zapfen 28 in zugeordnete Bohrungen 30 in den plattenförmigen Profilelementen 10 eingesetzt werden. Die Festlegung der Zapfen 28 in den Bohrungen 30 erfolgt Jedoch durch Ausbildung von Nietköpfen 32 an den freien Zapfönenden durch eine Umformung dieser Zapfenenden mit Ultraschall.7 shows a connection method of the strip-shaped profile element 12 with the plate-shaped profile elements 10, in which, in turn, projecting, cross-sectionally circular pins 28 are inserted from the opposite flat sides of the strip-shaped profile elements 12 into associated bores 30 in the plate-shaped profile elements 10. The fixing of the pin 28 in the bores 30 However, is carried out by forming rivet heads 32 on the free ends of the nozzle by reshaping these ends of the pins with ultrasound.
Figur 8 zeigt schließlich noch einen Stapel aus Verbundelementen 32, bei denen die leistenförmigen Profilelemente praktisch einstückig an den plattenförmigen Profilelementen 10 angeformt sind. Im dargestellten Fall sind auf gegenüberliegenden Seiten der plattenförmigen Profilelemente 10 Jeweils abwechselnd und auf den gegenüberliegenden Seiten Jeweils um den Abstand benachbarter leistenförmiger Profilelemente zueinander versetzt unterschiedliche leistenförmige Profilelemente 34, 36 vorgesehen, von denen das eine Profilelement 34 eine relativ schmale,, am freien Ende mit einem im Querschnitt kreisförmig verdickten Kopfbereich versehene Leiste ist, während das zweite Profilelement 36 als breitere Leiste mit einer zum Profilelement 34 komplementären Längsnut ausgebildet ist. Die Profilelemente 34 des einen Verbundelements 32 können also in die Profilelemente 36 des im Stapel nächstfolgenden Verbundelements 32 eingerastet werden. FIG. 8 finally shows a stack of composite elements 32, in which the strip-shaped profile elements are practically integrally formed on the plate-shaped profile elements 10. In the illustrated case, on the opposite sides of the plate-shaped profile elements 10, alternately and on the opposite sides, each offset by the distance between adjacent strip-shaped profile elements, different strip-shaped profile elements 34, 36 are provided, one of which has a relatively narrow profile element 34 at the free end is a bar with a circular thickened cross section, while the second profile element 36 is designed as a wider bar with a longitudinal groove complementary to the profile element 34. The profile elements 34 of the one composite element 32 can thus be snapped into the profile elements 36 of the next composite element 32 in the stack.

Claims

P a t e n t an s p r ü c h e ======================= P atent an sprü che =======================
1. Speichermaterial für die Wärmeübertragung zwischen Gasströmen in Wärmetauschern aus abstandshaltenden, leistenförmigen Profilelementen und mehreren, als Speieherelemente dienende plattenförmigen Profilelementen (12) aus wärmebeständigem Kunststoff, die zu Speicherblöcken zusammengesetzt sind, dadurch gekennzeichnet, daß die Profilelemente (10. 12; 32) aus Polyätherimid hergestellt sind.1. Storage material for the heat transfer between gas flows in heat exchangers from spacing, strip-shaped profile elements and several, serving as storage elements plate-shaped profile elements (12) made of heat-resistant plastic, which are assembled into storage blocks, characterized in that the profile elements (10. 12; 32) from Polyetherimide are made.
2. Speichermaterial nach .Anspruch 1, dadurch gekennzeichnet, daß die abstandhaltenden leistenförmigen und die wärmespeichernden plattenförmigen Profilelemente (12; 10) durch Ultraschallschweißung untereinander verbunden sind.2. Storage material according to .Anspruch 1, characterized in that the spacing strip-shaped and the heat-storing plate-shaped profile elements (12; 10) are interconnected by ultrasonic welding.
3. Speichermaterial nach Anspruch 1, dadurch gekennzeichnet, daß die Profilelemente (10; 12; 32) durch Klebung miteinander zu Speieherblocken verbunden sind.3. Storage material according to claim 1, characterized in that the profile elements (10; 12; 32) are bonded together to form memory blocks.
4. Speichermaterial nach Anspruch 3, gekennzeichnet durch eine Verbindung der Profilelemente (10; 12; 32) mittels einer Adhäsionsklebung mit Hilfe von Klebestoffen auf der Basis von Polyurethan, Silicon, nichtaminisehen Epoxidharzen oder Polyamidschmelzkleber. 4. Storage material according to claim 3, characterized by a connection of the profile elements (10; 12; 32) by means of an adhesive bond with the aid of adhesives based on polyurethane, silicone, non-aminous epoxy resins or polyamide hot melt adhesive.
5. Speichermaterial nach Anspruch 3, gekennzeichnet durch eine Verbindung der Profilelemente (10; 12; 32) mittels einer Diffusionsklebung unter Verwendung eines Lösungsmittels für Polyätherimid, vorzugsweise Methylenchlorid, in Konzentration von 1 bis 5 %.5. Storage material according to claim 3, characterized by a connection of the profile elements (10; 12; 32) by means of diffusion bonding using a solvent for polyetherimide, preferably methylene chloride, in a concentration of 1 to 5%.
6. Speiehermaterial nach Anspruch 1 bis 5, dadurch gekennzeichnet, daß die plattenförmigen und die leistenförmigen Profilelemente (10; 12; 32) in den Anschlußbereichen Schnappverbindungen bilden knöpf- oder leistenartig gestaltete Verbindungsglieder (20; 24; 26) für im Wechsel eingreifende und übergreifende Verbindungen zum Speicherblock aufweisen.6. Speiehermaterial according to claim 1 to 5, characterized in that the plate-shaped and the strip-shaped profile elements (10; 12; 32) form snap connections in the connection areas button or strip-shaped connecting links (20; 24; 26) for alternating engaging and overlapping Have connections to the memory block.
7. Speichermaterial nach Anspruch 3 bis 5, dadurch gekennzeichnet, daß die plattenförmigen Profilelemente (10) mit einstückig an ihnen angeformten leistenförmigen Profilelementen (34; 36) als integrale Verbundelemente (33) ausgebildet sind.7. Storage material according to claim 3 to 5, characterized in that the plate-shaped profile elements (10) with integrally molded on them strip-shaped profile elements (34; 36) are formed as integral composite elements (33).
8. Speiehermaterial nach .Anspruch 1 bis 5, dadurch gekennzeichnet, daß die Speicherblöcke aus gelochten plattenförmigen Profilelementen (10) und mit Nietköpfen (31) versehenen leistenförmigen Profilelementen (12) zusammengesetzt sind. 8. Spiehermaterial according to .Anspruch 1 to 5, characterized in that the memory blocks from perforated plate-shaped profile elements (10) and with rivet heads (31) provided strip-shaped profile elements (12) are composed.
9. Speiehermaterial nach Anspruch 8, dadurch gekennzeichnet, daß die leistenförmigen Profilelemente (12) mit den plattenförmigen Profilelementen (10) durch Ansenken der Nietköpfe (31) mittels Ultraschall zum Speicherblock verbunden sind.9. storage material according to claim 8, characterized in that the strip-shaped profile elements (12) with the plate-shaped profile elements (10) by lowering the rivet heads (31) are connected by ultrasound to the memory block.
10. Speichermaterial nach .Anspruch 1 bis 5, dadurch gekennzeichnet, daß die Speicherblöcke aus geschlitzten, plattenförmigen und aus leistenförmigen Profilelementen (10; 12) zusammengesetzt sind, wobei die leistenförmigen Profilelemente (12) profilierte Stege (24) aufweisen, die in die Schlitze (26) der plattenförmigen Profilelemente (10) eingerastet sind.10. Storage material according to .Anspruch 1 to 5, characterized in that the memory blocks of slotted, plate-shaped and strip-shaped profile elements (10; 12) are composed, wherein the strip-shaped profile elements (12) have profiled webs (24) which in the slots (26) of the plate-shaped profile elements (10) are engaged.
11. Speichermaterial nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, daß das Polyätherimid durch eingelagerte Fasern oder Fasergewebe, vorzugsweise Glasfasern oder Glasfasergewebe, armiert ist. 11. Storage material according to one of claims 1 to 10, characterized in that the polyetherimide is reinforced by embedded fibers or fiber fabrics, preferably glass fibers or glass fiber fabrics.
EP84902515A 1983-08-08 1984-06-23 Accumulation plant for heat transfer Withdrawn EP0152412A1 (en)

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DE3328548A DE3328548A1 (en) 1983-08-08 1983-08-08 STORAGE MATERIAL FOR HEAT TRANSFER
DE3328548 1983-08-08

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US4577678A (en) 1986-03-25
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JPS60501965A (en) 1985-11-14

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