EP1571390B1 - Double wall tank with magnetic suspension - Google Patents

Double wall tank with magnetic suspension Download PDF

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Publication number
EP1571390B1
EP1571390B1 EP04290556A EP04290556A EP1571390B1 EP 1571390 B1 EP1571390 B1 EP 1571390B1 EP 04290556 A EP04290556 A EP 04290556A EP 04290556 A EP04290556 A EP 04290556A EP 1571390 B1 EP1571390 B1 EP 1571390B1
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EP
European Patent Office
Prior art keywords
container
inner container
casing
metal tube
container 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.)
Expired - Lifetime
Application number
EP04290556A
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German (de)
French (fr)
Other versions
EP1571390A1 (en
Inventor
Klaus Schippl
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.)
Nexans SA
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Nexans SA
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 Nexans SA filed Critical Nexans SA
Priority to EP04290556A priority Critical patent/EP1571390B1/en
Priority to AT04290556T priority patent/ATE347069T1/en
Priority to DE502004002169T priority patent/DE502004002169D1/en
Priority to US11/016,538 priority patent/US7448511B2/en
Priority to KR1020050007945A priority patent/KR20050088933A/en
Priority to JP2005026895A priority patent/JP2005249195A/en
Publication of EP1571390A1 publication Critical patent/EP1571390A1/en
Application granted granted Critical
Publication of EP1571390B1 publication Critical patent/EP1571390B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/06—Closures, e.g. cap, breakable member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C3/00—Vessels not under pressure
    • F17C3/02—Vessels not under pressure with provision for thermal insulation
    • F17C3/08—Vessels not under pressure with provision for thermal insulation by vacuum spaces, e.g. Dewar flask
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0128—Shape spherical or elliptical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/03—Orientation
    • F17C2201/032—Orientation with substantially vertical main axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/014—Suspension means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/014—Suspension means
    • F17C2203/017—Magnetic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/01—Reinforcing or suspension means
    • F17C2203/014—Suspension means
    • F17C2203/018—Suspension means by attachment at the neck
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0304—Thermal insulations by solid means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0391—Thermal insulations by vacuum
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0602—Wall structures; Special features thereof
    • F17C2203/0612—Wall structures
    • F17C2203/0626—Multiple walls
    • F17C2203/0629—Two walls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0305—Bosses, e.g. boss collars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0308—Protective caps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2209/00—Vessel construction, in particular methods of manufacturing
    • F17C2209/22—Assembling processes
    • F17C2209/221—Welding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0337—Heat exchange with the fluid by cooling
    • F17C2227/0339—Heat exchange with the fluid by cooling using the same fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/03—Heat exchange with the fluid
    • F17C2227/0367—Localisation of heat exchange
    • F17C2227/0369—Localisation of heat exchange in or on a vessel
    • F17C2227/0376—Localisation of heat exchange in or on a vessel in wall contact
    • F17C2227/0381—Localisation of heat exchange in or on a vessel in wall contact integrated in the wall
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/03—Dealing with losses
    • F17C2260/031—Dealing with losses due to heat transfer
    • F17C2260/033—Dealing with losses due to heat transfer by enhancing insulation

Definitions

  • the invention relates to a double-walled container according to the preamble of claim 1.
  • Containers for low-boiling, liquefied gases are always provided with elaborate insulation in order to minimize the evaporation of the liquefied gas caused by the incidence of heat from the environment. They are therefore designed as a double-walled container, wherein the liquefied gas receiving inner container is mounted in an ambient temperature exposed outer container, wherein between the inner container and the outer container, an insulating layer is provided.
  • the insulation consists of poorly heat-conductive material such as superinsulation. After completion of the container, the gap is evacuated.
  • the cold inner container is connected by mechanical suspension or support elements with the outer container.
  • Such connections are unavoidable in order to absorb the forces acting on the inner container due to their own weight and operating stresses. For this they must have sufficient mechanical strength and rigidity and thus inevitably lead to heat through solid-state heat conduction.
  • the inner container is superconductor, which are located in the liquefied gas and stored on the outer container arranged on the permanent magnet non-contact to the outer container.
  • the superconductor is type II ceramic superconductors such as. YBCO 123 or BSCCU 2212, whose critical temperature Tc is above the temperature of the low-boiling liquefied gas.
  • a tubular conduit is provided, which penetrates through the walls of the outer container and the inner container. For smaller containers from which the liquefied gas can be removed by pouring, this solution is not useful.
  • the present invention has for its object to provide a double-walled container for liquefied gases, which is easy to handle and in which the heat losses are reduced in particular in the region of the spout and thus the storage time of the liquefied gas can be extended.
  • Figure 1 shows a section through a container according to the teachings of the invention.
  • Figure 2 shows an enlarged section through the spout of the container according to the invention.
  • the container consists of an inner container 1, which receives the medium and a surrounding the inner container 1 outer housing. 2
  • the container 1 and the housing 2 have the shape of a ball and are composed of two hemispherical shells. However, other embodiments are possible.
  • the hemispherical shells are expediently made of austenitic steel and are connected to each other by a weld.
  • a thin-walled corrugated metal tube 3 is welded, which serves as a filling and as a pouring device.
  • a pipe stub 4 is arranged on the outer housing 2, which is also welded to the outer housing 2.
  • the intermediate space 5 located between the inner container 1 and the outer housing 2 is filled with several layers 6 superinsulation and evacuated. Also, the annular space 7 between the metal tube 3 and the pipe socket 4 has a plurality of layers Super insulation on.
  • the vacuum space 5 is sealed to the outside by an annular disk 14.
  • the high-temperature superconductor 8 On the inner container 1, two high-temperature superconductor 8 are attached.
  • the high-temperature superconductors 8 opposite two permanent magnets 9 are provided which are fixed to the outer housing 2.
  • the high-temperature superconductor 8 and the permanent magnets 9 provide a non-contact storage of the inner container 1 in the outer housing. 2
  • the enthalpy of the cold gas is fully utilized and the heat inflow through the metal tube 3 into the interior of the container 1 is reduced.
  • the vacuum space is sealed by the annular disc 14, which is gas-tight welded to the pipe socket 4 and a screwed onto the end of the metal tube 3 bushing 12.
  • the end of the metal tube 3 is also welded to the bushing 12.
  • the exiting from the interior of the container 1 cold gas can escape through an outlet 13 into the atmosphere.
  • the wall thickness of the metal tube 3 is kept as low as possible.
  • the metal tube 3 is made of a stainless steel plate by longitudinal seam welding and subsequent shafts whose wall thickness is between 0.1 and 0.5 mm.
  • the length of the metal tube 3 is between 30 and 200 mm, its outer diameter is between
  • the metal tube 3 has a very low thermal conductivity due to its small wall thickness and due to the stainless steel material. From the corrugation of the metal tube 3 still results in the advantage that the metal tube 3 has a high degree of flexibility and a higher transverse stiffness than a smooth metal tube. In addition, that is Corrugated metal tube 3 "longer” than a smooth metal tube, as more metal band is required. Due to the larger "length", the thermal conductivity is even lower.
  • the container according to the teachings of the invention is particularly suitable for liquefied gases. Compared to commercially available containers results in an extension of the liquefied gas storage by several factors.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

The double-walled container has a permanent magnet in the vacuum chamber (5) between the inner and outer containers set opposite a high temperature supra conductor (8) . The inner container (1) and outer housing (2) each have extrusions (3,4) arranged concentric with each other whereby the extrusion of the inner container is a helically ribbed metal tube (3) whose outwardly pointing end is fitted with the extrusion of the outer housing. The permanent magnet (9) is fixed on the housing and the supra conductor on the inner container.

Description

Die Erfindung betrifft einen doppelwandigen Behälter nach dem Oberbegriff des Anspruchs 1.The invention relates to a double-walled container according to the preamble of claim 1.

Behälter für tiefsiedende, verflüssigte Gase sind stets mit einer aufwendigen Isolierung versehen, um die durch den Wärmeeinfall aus der Umgebung verursachte Verdampfung des verflüssigten Gases gering zu halten. Sie werden deshalb als doppelwandige Behälter ausgeführt, wobei ein das verflüssigte Gas aufnehmender Innenbehälter in einem der Umgebungstemperatur ausgesetzten Außenbehälter gelagert ist, wobei zwischen dem Innenbehälter und dem Außenbehälter eine Isolierschicht vorgesehen ist.Containers for low-boiling, liquefied gases are always provided with elaborate insulation in order to minimize the evaporation of the liquefied gas caused by the incidence of heat from the environment. They are therefore designed as a double-walled container, wherein the liquefied gas receiving inner container is mounted in an ambient temperature exposed outer container, wherein between the inner container and the outer container, an insulating layer is provided.

Die Isolierung besteht aus schlecht wärmeleitendem Material wie beispielsweise Superisolation. Nach Fertigstellung des Behälters wird der Zwischenraum evakuiert.The insulation consists of poorly heat-conductive material such as superinsulation. After completion of the container, the gap is evacuated.

Der kalte Innenbehälter ist durch mechanische Aufhängung oder Stützelemente mit dem Außenbehälter verbunden. Solche Verbindungen sind unvermeidlich, um die durch Eigengewicht und Betriebsbeanspruchungen auf den Innenbehälter wirkenden Kräfte aufnehmen zu können. Dazu müssen sie eine ausreichende mechanische Festigkeit und Steifigkeit aufweisen und führen so zwangsläufig zu Wärmeeinfall durch Festkörper-Wärmeleitung.The cold inner container is connected by mechanical suspension or support elements with the outer container. Such connections are unavoidable in order to absorb the forces acting on the inner container due to their own weight and operating stresses. For this they must have sufficient mechanical strength and rigidity and thus inevitably lead to heat through solid-state heat conduction.

Besondere Auswirkungen hat dies bei Fahrzeugtanks für neue Kryokraftstoffe. Bei diesen Tanks muß wegen optimaler Ausnutzung des zur Verfügung stehenden Tankraums der Isolationsabstand zwischen Innen- und Außenbehälter so gering wie möglich gehalten werden. Bei konventioneller Behälteraufhängung führt dies zu kurzen Stützelementen mit vergleichsweise hohen Wärmeeinfall und dadurch eingeschränkten Standzeiten.This has a particular impact on vehicle tanks for new cryofuels. In these tanks, the insulation distance between the inner and outer container must be kept as low as possible because of optimal utilization of the available tank space become. In conventional container suspension, this leads to short support elements with comparatively high heat input and thus limited service life.

Aus der DE 44 18 745 C2 ist ein doppelwandiger Behälter für die Speicherung tiefsiedender verflüssigter Gase mit einem Außenbehälter und einem im Außenbehälter gelagerten, das verflüssigte Gas aufnehmenden Innenbehälter, bekannt. Der Innenbehälter ist über Supraleiter, die sich in dem verflüssigten Gas befinden und über am Außenbehälter angeordnete Permanentmagneten berührungsfrei zum Außenbehälter gelagert. Bei dem Supraleiter handelt es sich um keramische Supraleiter vom Typ II wie z. B. YBCO 123 oder BSCCU 2212, deren kritische Temperatur Tc über der Temperatur des tiefsiedenden verflüssigten Gases liegt.From DE 44 18 745 C2 a double-walled container for the storage of low-boiling liquefied gases with an outer container and a stored in the outer container, the liquefied gas receiving inner container known. The inner container is superconductor, which are located in the liquefied gas and stored on the outer container arranged on the permanent magnet non-contact to the outer container. The superconductor is type II ceramic superconductors such as. YBCO 123 or BSCCU 2212, whose critical temperature Tc is above the temperature of the low-boiling liquefied gas.

Zur Befüllung des Innenbehälters mit verflüssigtem Gas bzw. zur Entnahme ist eine rohrförmige Leitung vorgesehen, die durch die Wandungen des Außenbehälters und des Innenbehälters dringt. Für kleinere Behälter aus denen das verflüssigte Gas durch Gießen entnommen werden kann, ist diese Lösung nicht brauchbar.For filling the inner container with liquefied gas or for removal, a tubular conduit is provided, which penetrates through the walls of the outer container and the inner container. For smaller containers from which the liquefied gas can be removed by pouring, this solution is not useful.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, einen doppelwandigen Behälter für verflüssigte Gase bereitzustellen, der gut handhabbar ist und bei dem die Wärmeverluste insbesondere im Bereich der Ausgußöffnung verringert werden und somit die Lagerzeit des Flüssiggases verlängert werden kann.The present invention has for its object to provide a double-walled container for liquefied gases, which is easy to handle and in which the heat losses are reduced in particular in the region of the spout and thus the storage time of the liquefied gas can be extended.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 erfaßten Merkmale gelöst.This object is achieved by the features covered in the characterizing part of claim 1.

Die wesentlichen Vorteile der Erfindung sind:

  • die automatische Aktivierung des Schwebezustands wird durch die flexible Halterung im Bereich der Ausgußöffnung erreicht,
  • die Wärmeverluste im Bereich der Ausgußöffnung werden durch die Verwendung des schraubenlinienförmig gewellten Metallrohres reduziert. Durch den nichtmetallischen Stopfen wird das kalte verdampfte Gas in dem schraubenlinienförmig um die Ausgußöffnung herumlaufenden Strömungskanal entlanggeführt und erwärmt sich dort bis zum Austritt aus dem Ausguß. Dadurch wird die Enthalpie des Kaltgases voll ausgenutzt und die Wärmeeinströmung durch den Ausguß ins Innere des Behälters reduziert.
The main advantages of the invention are:
  • the automatic activation of the floating state is achieved by the flexible support in the region of the pouring opening,
  • the heat losses in the region of the spout opening are reduced by the use of the helically corrugated metal tube. By the non-metallic plug, the cold vaporized gas is guided along in the helically around the spout opening flow channel and heats up there until it leaves the spout. As a result, the enthalpy of the cold gas is fully utilized and the heat inflow through the spout into the interior of the container is reduced.

Weitere vorteilhafte Ausgestaltungen der Erfindung sind in den Unteransprüchen erfaßt.Further advantageous embodiments of the invention are covered in the subclaims.

Die Erfindung ist anhand des in den Figuren 1 und 2 schematisch dargestellten Ausführungsbeispiels näher erläutert.The invention is explained in more detail with reference to the embodiment schematically illustrated in Figures 1 and 2.

Figur 1 zeigt einen Schnitt durch einen Behälter nach der Lehre der Erfindung.Figure 1 shows a section through a container according to the teachings of the invention.

Figur 2 zeigt einen vergrößerten Schnitt durch den Ausguß des erfindungsgemäßen Behälters.Figure 2 shows an enlarged section through the spout of the container according to the invention.

Der Behälter besteht aus einem inneren Behälter 1, der das Medium aufnimmt und einem den inneren Behälter 1 umgebenden äußeren Gehäuse 2.The container consists of an inner container 1, which receives the medium and a surrounding the inner container 1 outer housing. 2

Der Behälter 1 und das Gehäuse 2 haben die Form einer Kugel und sind aus zwei halbkugelförmigen Schalen zusammengesetzt. Es sind jedoch auch andere Ausgestaltungen möglich.The container 1 and the housing 2 have the shape of a ball and are composed of two hemispherical shells. However, other embodiments are possible.

Die halbkugelförmigen Schalen bestehen zweckmäßigerweise aus austenitischem Stahl und sind durch eine Schweißnaht miteinander verbunden.The hemispherical shells are expediently made of austenitic steel and are connected to each other by a weld.

An dem inneren Behälter 1 ist ein dünnwandiges gewelltes Metallrohr 3 angeschweißt, welches als Füll- sowie als Ausgußvorrichtung dient.On the inner container 1, a thin-walled corrugated metal tube 3 is welded, which serves as a filling and as a pouring device.

Konzentrisch zum Metallrohr 3 ist an dem äußeren Gehäuse 2 ein Rohrstutzen 4 angeordnet, der ebenfalls mit dem äußeren Gehäuse 2 verschweißt ist.Concentric with the metal tube 3, a pipe stub 4 is arranged on the outer housing 2, which is also welded to the outer housing 2.

Der zwischen dem inneren Behälter 1 und dem äußeren Gehäuse 2 befindliche Zwischenraum 5 ist mit mehreren Lagen 6 Superisolierung ausgefüllt und evakuiert. Auch der Ringraum 7 zwischen dem Metallrohr 3 und dem Rohrstutzen 4 weist mehrere Lagen Superisolierung auf. Der Vakuumraum 5 ist nach außen durch eine Ringscheibe 14 abgedichtet.The intermediate space 5 located between the inner container 1 and the outer housing 2 is filled with several layers 6 superinsulation and evacuated. Also, the annular space 7 between the metal tube 3 and the pipe socket 4 has a plurality of layers Super insulation on. The vacuum space 5 is sealed to the outside by an annular disk 14.

An dem inneren Behälter 1 sind zwei Hochtemperatursupraleiter 8 angebracht. Den Hochtemperatursupraleitern 8 gegenüber sind zwei Permanentmagnete 9 vorgesehen, die an den äußeren Gehäuse 2 befestigt sind. Die Hochtemperatursupraleiter 8 und die Permanentmagnete 9 sorgen für eine berührungsfreie Lagerung des inneren Behälters 1 in dem äußeren Gehäuse 2.On the inner container 1, two high-temperature superconductor 8 are attached. The high-temperature superconductors 8 opposite two permanent magnets 9 are provided which are fixed to the outer housing 2. The high-temperature superconductor 8 and the permanent magnets 9 provide a non-contact storage of the inner container 1 in the outer housing. 2

In dem Metallrohr 3 ist noch ein Stopfen 10 aus Isoliermaterial, z. B. Kunststoff vorgesehen, dessen Durchmesser nahezu gleich der lichten Weite des Metallrohres 3 ist, so daß der Innenraum des inneren Behälters 1 mit der äußeren Umgebung durch einen schraubenlinienförmigen Kanal 11 (s. Figur 2) verbunden ist, durch den verdampftes Kaltgas austreten kann. Dabei wird die Enthalpie des Kaltgases voll ausgenutzt und die Wärmeeinströmung durch das Metallrohr 3 ins Innere des Behälters 1 reduziert.In the metal tube 3 is still a plug 10 made of insulating material, for. B. plastic, whose diameter is almost equal to the clear width of the metal tube 3, so that the interior of the inner container 1 with the external environment by a helical channel 11 (see Figure 2) is connected, can escape through the vaporized cold gas. The enthalpy of the cold gas is fully utilized and the heat inflow through the metal tube 3 into the interior of the container 1 is reduced.

Wie in der Figur 2 vergrößert dargestellt ist der Vakuumraum durch die Ringscheibe 14 abgedichtet, die mit dem Rohrstutzen 4 sowie einer auf das Ende des Metallrohres 3 aufgeschraubte Buchse 12 gasdicht verschweißt ist. Das Ende des Metallrohres 3 ist ebenfalls mit der Buchse 12 verschweißt. Das aus dem Innern des Behälters 1 austretende Kaltgas kann durch eine Auslaßöffnung 13 in die Atmosphäre entweichen. Um den Wärmeeinfall von außen in den Behälter 1 weitestgehend zu reduzieren, wird die Wanddicke des Metallrohres 3 so weit wie möglich gering gehalten. So wird das Metallrohr 3 aus einem Blech aus rostfreiem Stahl durch Längsnahtschweißen und anschließendes Wellen hergestellt, dessen Wanddicke zwischen 0,1 und 0,5 mm liegt. Die Länge des Metallrohres 3 beträgt zwischen 30 und 200 mm, sein Außendurchmesser liegt zwischenAs shown enlarged in the figure 2, the vacuum space is sealed by the annular disc 14, which is gas-tight welded to the pipe socket 4 and a screwed onto the end of the metal tube 3 bushing 12. The end of the metal tube 3 is also welded to the bushing 12. The exiting from the interior of the container 1 cold gas can escape through an outlet 13 into the atmosphere. In order to reduce the heat input from the outside into the container 1 as far as possible, the wall thickness of the metal tube 3 is kept as low as possible. Thus, the metal tube 3 is made of a stainless steel plate by longitudinal seam welding and subsequent shafts whose wall thickness is between 0.1 and 0.5 mm. The length of the metal tube 3 is between 30 and 200 mm, its outer diameter is between

Das Metallrohr 3 hat aufgrund seiner geringen Wanddicke und aufgrund des Werkstoffes rostfreier Stahl eine sehr geringe Wärmeleitfähigkeit. Aus der Wellung des Metallrohres 3 resultiert noch der Vorteil, daß das Metallrohr 3 eine große Flexibilität und eine höhere Quersteifigkeit als ein glattes Metallrohr aufweist. Darüberhinaus ist das gewellte Metallrohr 3 "länger" als ein glattes Metallrohr, da mehr Metallband erforderlich ist. Durch die größere "Länge" wird die Wärmeleitfähigkeit nochmals geringer. Der Behälter nach der Lehre der Erfindung ist besonders für verflüssigte Gase geeignet. Gegenüber handelsüblichen Behältern ergibt sich eine Verlängerung der Flüssiggaslagerung um mehrere Faktoren.The metal tube 3 has a very low thermal conductivity due to its small wall thickness and due to the stainless steel material. From the corrugation of the metal tube 3 still results in the advantage that the metal tube 3 has a high degree of flexibility and a higher transverse stiffness than a smooth metal tube. In addition, that is Corrugated metal tube 3 "longer" than a smooth metal tube, as more metal band is required. Due to the larger "length", the thermal conductivity is even lower. The container according to the teachings of the invention is particularly suitable for liquefied gases. Compared to commercially available containers results in an extension of the liquefied gas storage by several factors.

Claims (7)

  1. Double-walled container for the storage and transport of cryogenic media, comprising an inner container holding the medium as well as a casing disposed at a distance from the inner container and an evacuated space located between the inner container and the outer casing, such that at least one permanent magnet is disposed in the evacuated space and the permanent magnet is opposite a high-temperature superconductor, so that the inner container is supported in the casing without contact, characterized by the following features:
    - the high-temperature superconductor (8) is located in the evacuated space (5),
    - the inner container (1) and the casing (2) each have an extrusion (3, 4), with the extrusions (3, 4) being arranged concentrically to each other,
    - the extrusion (3) of the inner container (1) is a helically corrugated metal tube (3), the outward facing end of which is fastened to the extrusion (4) of the casing (2).
  2. Container according to Claim 1, characterized in that the permanent magnet (9) is fastened to the casing (2) and the superconductor (8) is fastened to the inner container (1).
  3. Container according to Claim 1 or 2, characterized in that a plurality of layers (6) of a super insulation material are provided in the evacuated space (5).
  4. Container according to one of Claims 1 to 3, characterized in that a plug (10) made of a non-metallic material is located inside the corrugated metal tube (3).
  5. Container according to Claim 4, characterized in that the plug (10) fills the clear cross section of the corrugated metal tube (3), so that a helically extending channel (11) is formed between the corrugated tube (3) and the plug (10).
  6. Container according to one of Claims 1 to 5, characterized in that the corrugated tube (3) has a wall thickness of from 0.1 to 0.5 mm.
  7. Container according to one of Claims 1 to 6, characterized in that two or more permanent magnets (9) and high-temperature superconductors (8) are arranged in the evacuated space (5) at an angle of from 0 to 90° from the vertical and are uniformly distributed in the lower part of the container.
EP04290556A 2004-03-01 2004-03-01 Double wall tank with magnetic suspension Expired - Lifetime EP1571390B1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP04290556A EP1571390B1 (en) 2004-03-01 2004-03-01 Double wall tank with magnetic suspension
AT04290556T ATE347069T1 (en) 2004-03-01 2004-03-01 DOUBLE-WALLED CONTAINER WITH MAGNETIC SUSPENSION
DE502004002169T DE502004002169D1 (en) 2004-03-01 2004-03-01 Double-walled container with magnetic suspension
US11/016,538 US7448511B2 (en) 2004-03-01 2004-12-17 Double-wall tank
KR1020050007945A KR20050088933A (en) 2004-03-01 2005-01-28 Double-walled tank
JP2005026895A JP2005249195A (en) 2004-03-01 2005-02-02 Double wall container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04290556A EP1571390B1 (en) 2004-03-01 2004-03-01 Double wall tank with magnetic suspension

Publications (2)

Publication Number Publication Date
EP1571390A1 EP1571390A1 (en) 2005-09-07
EP1571390B1 true EP1571390B1 (en) 2006-11-29

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ID=34746155

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04290556A Expired - Lifetime EP1571390B1 (en) 2004-03-01 2004-03-01 Double wall tank with magnetic suspension

Country Status (6)

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US (1) US7448511B2 (en)
EP (1) EP1571390B1 (en)
JP (1) JP2005249195A (en)
KR (1) KR20050088933A (en)
AT (1) ATE347069T1 (en)
DE (1) DE502004002169D1 (en)

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Also Published As

Publication number Publication date
US7448511B2 (en) 2008-11-11
DE502004002169D1 (en) 2007-01-11
KR20050088933A (en) 2005-09-07
JP2005249195A (en) 2005-09-15
US20050211710A1 (en) 2005-09-29
EP1571390A1 (en) 2005-09-07
ATE347069T1 (en) 2006-12-15

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