EP2492576A1 - Doppelmembransgasspeicher mit Innen- und Außenmembran - Google Patents

Doppelmembransgasspeicher mit Innen- und Außenmembran Download PDF

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Publication number
EP2492576A1
EP2492576A1 EP11159665A EP11159665A EP2492576A1 EP 2492576 A1 EP2492576 A1 EP 2492576A1 EP 11159665 A EP11159665 A EP 11159665A EP 11159665 A EP11159665 A EP 11159665A EP 2492576 A1 EP2492576 A1 EP 2492576A1
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EP
European Patent Office
Prior art keywords
membrane
gas
exterior
storage
interior
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Withdrawn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
EP11159665A
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English (en)
French (fr)
Inventor
Peter Verwanger
Irene Verwanger
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Individual
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Individual
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Priority to EP11159665A priority Critical patent/EP2492576A1/de
Priority to PCT/EP2012/053110 priority patent/WO2012113888A1/en
Publication of EP2492576A1 publication Critical patent/EP2492576A1/de
Withdrawn legal-status Critical Current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
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/16—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge constructed of plastics materials
    • 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
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0109—Shape cylindrical with exteriorly curved end-piece
    • 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
    • F17C2201/0104—Shape cylindrical
    • F17C2201/0119—Shape cylindrical with flat end-piece
    • 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
    • F17C2201/0147—Shape complex
    • 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
    • F17C2201/0176—Shape variable
    • 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
    • F17C2201/054—Size medium (>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
    • F17C2203/06—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
    • F17C2203/0614—Single wall
    • F17C2203/0617—Single wall with one layer
    • 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
    • F17C2203/0614—Single wall
    • F17C2203/0619—Single wall with two layers
    • 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
    • F17C2203/0658—Synthetics
    • F17C2203/066—Plastics
    • 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
    • F17C2203/068—Special properties of materials for vessel walls
    • F17C2203/0682—Special properties of materials for vessel walls with liquid or gas layer
    • 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
    • F17C2203/068—Special properties of materials for vessel walls
    • F17C2203/0685—Special properties of materials for vessel walls flexible
    • 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
    • F17C2209/23—Manufacturing of particular parts or at special locations
    • F17C2209/234—Manufacturing of particular parts or at special locations of closing end pieces, e.g. 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, 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
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0408—Level of content in the vessel
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F17C2250/0434—Pressure difference
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0486—Indicating or measuring characterised by the location
    • F17C2250/0491—Parameters measured at or inside the vessel
    • 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
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0486—Indicating or measuring characterised by the location
    • F17C2250/0495—Indicating or measuring characterised by the location the indicated parameter is a converted measured parameter
    • 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
    • F17C2260/01—Improving mechanical properties or manufacturing
    • 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
    • F17C2260/01—Improving mechanical properties or manufacturing
    • F17C2260/011—Improving strength
    • 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
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0134—Applications for fluid transport or storage placed above the ground
    • F17C2270/0136—Terminals

Definitions

  • the present invention relates to a covering for a gas storage and a gas storage to which the covering is mounted. Furthermore, the present invention relates to a method of manufacturing a gas storage.
  • a gas storage in particular a gas storage for biogas, such as a fermenter of a bio gas plant, comprises a ground plate to which sidewalls of the gas storage are mounted.
  • the open side which is located opposed to the ground plate may be covered by an interior membrane and an exterior membrane. Between the interior and the exterior membrane an outer volume is generated into which a support gas by a blower is blown in for supporting the exterior membrane.
  • This design of the gas storage is called double membrane gas storage.
  • the interior membrane and the exterior membrane may be mounted e.g. by a clamping connection to upper edges of the side walls. Between the interior and the exterior membrane the support gas is blown in, such that the outer volume is filled with support gas (e.g. air).
  • the exterior membrane absorbs the loads generated by environmental forces, such a wind loads, snow loads or rain loads.
  • the interior membrane which is located below the exterior membrane divides the storage volume in an outer volume (filled with support gas) and an inner volume (filled with industrial gas). Depending on the filling level of the inner volume, the interior membrane floats in a different height. If the gas storage is filled with industrial gas, the interior membrane is lifted and squeezes the support gas out of the outer volume.
  • the support gas is drained off from the outer volume through a gas control valve or is blown in by a blower.
  • a gas control valve For example, if industrial gas is drained off from the inner volume and thus the interior membrane sinks in the direction to the ground, the blower blows support gas into the outer volume again.
  • Double membrane gas storages comprise supporting structures inside the inner volume.
  • a structure comprises e.g. a central pillar with a mesh of belts which are connected between edges of the sidewalls and the central pillar.
  • the belts prevent a sinking of the interior membrane to the ground or i.e. the biomass stored in the fermenter.
  • Fig. 5 shows a conventional double membrane gas storage.
  • the gas storage is covered by the exterior membrane 501 and the interior membrane 502 which partially envelopes the inner volume 503.
  • the outer volume 504 is generated between the exterior membrane 501 and the interior membrane 502.
  • a blower 505 is adapted for blowing support gas in the outer volume 504 for preserving a predefined higher pressure in comparison to the environmental pressure of the gas storage.
  • the exterior membrane 501 is strained and thus stabilized.
  • the exterior membrane 501 may thus withstand loads from wind or snow.
  • the gas pressure of the support gas affects the interior membrane 502 as well.
  • the interior membrane 502 is flabby and folded.
  • the interior membrane 502 floats in a different height.
  • the pressure in the inner volume 503 corresponds to the support gas pressure in the outer volume 504.
  • the pressure in the inner volume 503 is slightly higher than the pressure in the outer volume 504, due to the weight of the interior membrane 502 which affects the inner volume 503.
  • the pressure in the outer volume 504 and thereby the pressure in the inner volume 503 is controllable by a control valve 508 or by the blower 505.
  • the lowest position of the interior membrane is limited by an interior supporting structure 507.
  • the supporting structure 507 prevents the interior membrane 502 from touching the ground, the biomass inside the gas storage or rotating stirring devices 509 which could damage the interior membrane 502.
  • the filling level is measured be a level indicator 506, which measures the position of a point or section on the interior membrane 502.
  • the exterior membrane 501 is manufactured in a predefined shape, such as a half ball shape. If the pressure in the outer volume 504 falls, the material of the exterior membrane with conventional materials, such as PVC coated polyester fabrics, cannot shrink and adapt the falling pressure such that the exterior membrane 501 forms foldings and becomes instable.
  • Fig. 6 shows a conventional double membrane gas storage, wherein the exterior membrane 601 and the interior membrane 602 are mounted to the ground 10.
  • the storage volume 603 is enveloped by the ground 10 and the interior membrane 602.
  • a blower 605, a level indicator 606 and a control valve 608 is shown which are similar to the respective features of Fig. 5
  • Fig. 7 shows a conventional gas storage, wherein the blower 705 fails or wherein the exterior membrane 701 has a leakage 711.
  • the support gas pressure in the outer volume collapses.
  • the exterior membrane is flabby and folded and is thus not longer stable.
  • the exterior membrane 701 cannot withstand the loads from wind and snow.
  • the operation of the double membrane gas storage has to be stopped for preventing an aggravation of the damage.
  • Fig. 8 shows a conventional gas storage, wherein the result of a leakage 812 in the interior membrane 802 is shown.
  • Industrial gas streams through the leakage 812 out of the inner volume 803 in the outer volume 804. This may cause an explosive gas mixture in the complete outer volume 804.
  • the mixed explosive gas will be drained off to the environment by the control valve 808 which cause undesired gas emissions.
  • Fig. 9 shows a position of a conventional interior membrane 902 which is not tightened.
  • the level indicator 906 measures a full level of gas due to a measurement of a peak point of a folding, although sufficient storage volume would still be available.
  • Fig. 10 shows a position of the interior membrane 902 in a conventional gas storage, with which the level indicator 906 measures an empty level of gas due to a measurement point at a minimum height of the folded interior membrane, although the gas storage is almost maximally filled.
  • Fig. 9 and Fig. 10 describe the inadequate level measurement and the limited usability of a conventional gas storage due to a folded, non-tightened conventional interior membrane 902.
  • the weld seam strength of the conventionally used PVC coated polyester fabrics is reduced under high temperatures.
  • the temperatures of the conventional exterior membranes are very high under certain circumstances (solar irradiation, dark colors of exterior membrane, dirt particles on the exterior membrane). This high temperature may cause a defect in the weld seams due to the weakness of the PVC coating.
  • the PVC coated polyester fabrics are very brittle. For this reason, installation of the exterior membrane under low temperatures is not possible. Furthermore, during changing operating conditions of the gas storage, the membranes may form foldings. This would lead to a buckling of the membranes and thus to a defect under low temperatures. When buckling the PVC coated polyester fabrics the coating breaks and the fibres may be no longer covered by the coating.
  • exterior membranes made of PVC coated polyester fabrics which are very stiff and hardly stretchable or contractible, have to be tailored in the final shape which have to be formed by the membranes in the operating state of the gas storage (such as a half ball shape).
  • the interior membrane has only in the maximum filled inner volume or empty inner volume the defined end position.
  • the position of the interior membrane is not locatable in a partially filled inner volume.
  • the measurement of the position and shape of the interior membrane and thus of the filling level is thus not very precise.
  • only a part of the inner volume may be used for storing industrial gas due to the imprecise filling level measurement.
  • parts of the interior volume may be located at a lower position and other parts may be located at a higher position inside the gas storage.
  • the interior membrane may be damaged by the stirring biomass or the stirring device inside the inner volume.
  • PVC coated polyester fabrics may be damaged and a durable contact with the biomass may embrittle the coating.
  • a supporting structure is installed in the inner volume, wherein the supporting structure limits the lowest position of the interior membrane. The supporting structure may cause high production and installation costs.
  • the disadvantages with the conventional storages may be a breakdown, if the blower fails, or a breakdown, if a leakage in the interior or exterior membrane occurs.
  • the filling level is not measurable precisely and the maximal storage volume is not usable due to the imprecise filling level measurement.
  • the tailoring of the membranes in a curved (half ball) shape causes high production costs.
  • the PVC coated polyester fabrics comprise a poor temperature resistance.
  • This object is solved by a covering for a gas storage, a gas storage and by a method of manufacturing a storage for a gaseous medium according to the independent claims.
  • a covering for a gas storage comprises an interior membrane which is mountable to the gas storage for at least partially enveloping an inner volume of the gas storage for storing industrial gas and an exterior membrane which is mountable to the gas storage, wherein the exterior membrane covers the interior membrane in such a way that an outer volume for storing support gas is generated between the exterior membrane and the interior membrane.
  • the exterior membrane comprises a material with an ultimate elongation of more than 100% (e.g. measured under a temperature of 23° degree Celsius).
  • a gas storage for an industrial gas comprises the above described covering.
  • the interior membrane is mounted to the gas storage for at least partially enveloping the inner volume.
  • the exterior membrane is mounted to the gas storage wherein the exterior membrane covers the interior membrane in such a way that an outer volume for storing support gas is generated between the exterior membrane and the interior membrane.
  • a method of manufacturing a storage for a gaseous medium comprises mounting an interior membrane to the gas storage for at least partially enveloping an inner volume of the gas storage for storing industrial gas and mounting an exterior membrane to the gas storage, wherein the exterior membrane covers the interior membrane in such a way that an outer volume for storing support gas is generated between the exterior membrane and the interior membrane.
  • the exterior membrane comprises a material with an ultimate elongation of more than 100% (e.g. measured under a temperature of 23° degree Celsius).
  • the storage for a gaseous medium may comprise any desired tubular shape, for example with a circular, oval, rectangular or polygonal ground area.
  • An open top side of the storage is covered by the above-described interior and exterior membrane, so that within the interior of the storage the storage volume with the inner and outer volume is provided.
  • the storage may alternatively be formed by a ground plate to which the exterior membrane is mounted.
  • the gaseous medium comprises components of industrial gas, such as natural gas or biogas, and components of support gas, such as air or inert gas.
  • the storage device may be a biogas storage, so that additionally to the gaseous medium biomass may be stored within the storage.
  • the storage volume for the gaseous medium is the volume that is enveloped by the biomass, the membrane and in some embodiments the sidewall of the storage.
  • the exterior membrane and/or the interior membrane described by the present invention comprises a material with an ultimate elongation of more than 100% and is expandable and stretchable.
  • the interior membrane may as well comprise a material with an ultimate elongation of more than 100%.
  • the material may be elastic or ductile.
  • the exterior membrane and/or the interior membrane may be manufactured in a plane panel shape or plane plate shape.
  • the exterior membrane and/or the interior membrane may in particular be made of a fibre-free material, i.e. the membrane is not made of a material with inductile fibres.
  • the exterior membrane and/or the interior is made of a foil-like material.
  • the material of the exterior membrane and/or the interior membrane may be an elastomer and/or a thermoplastic elastomer.
  • the exterior membrane is stretched from its plane shape until the exterior membrane forms a balloon like shape.
  • the membrane is stretched until the tension of the membrane and the pressure in the inner volume form an equilibration.
  • the manufacturing of the exterior membrane in the shape of a plane panel is easy and cost saving. If a larger curvature is desired the exterior membrane may be manufactured in a cone like shape and a cylindrical shape. The stretched final curved shape in the nominal operating condition may be reached after the exterior membrane is stretched by the support gas pressure.
  • a use of a stretchable interior membrane and a stretchable exterior membrane leads in combination to the technical effect that the gas storage may be further operated even if a leakage in the interior membrane occurs. If a leakage in the interior membrane occurs, the blower may be switched off and the support gas pressure is reduced so that the exterior membrane sinks until the exterior membrane lies onto the interior membrane. Hence, the leakage is sealed by the exterior membrane.
  • the gas storage may be further operated with a reduced gas pressure.
  • a stiff and only little stretchable interior membrane forms foldings, such that the exterior membrane can only hardly generate a sealing contact with the interior membrane around the region of the leakage.
  • the filling level of the inner volume may be measured more exactly.
  • One height position of a predetermined point onto the interior membrane may be measured.
  • the height position of the predetermined point may be indicative for the shape of the interior membrane and thus for the filling level.
  • the exterior membrane is formed for being expandable (stretchable) and shrinkable according to the pressure of the support gas in the outer volume. Even if the gas pressure in the outer volume decreases, the exterior membrane shrinks and reduces its area size, so that the storage volume is reduced. Hence, the pressure in the storage volume and the tension of the membrane is kept in between predetermined pressure ranges due to the reduced area size of the exterior membrane and a sufficient tension of the exterior membrane is still provided that prevents the exterior membrane from leaving its homogeneous shape. In other words, due to the stretching and expanding properties of the exterior membrane, the area size of the exterior membrane is adaptable and amendable to the respective pressure of a gaseous medium in the storage volume. Hence, if a tension of the exterior membrane is still kept up, so that e.g. fluttering of the exterior membrane under influence of wind may be prevented.
  • the exterior membrane is formed in such a way that the exterior membrane has a stretch ratio between an expanded condition of the exterior membrane in a regular operating condition and a force-free unexpanded condition of the exterior membrane of more than 1, 1.
  • the force-free unexpanded condition of the exterior membrane defines the condition of the exterior membrane, at which i.e. no tractive forces or pressure forces caused due to a pressure difference between the pressure of the storage volume and an ambient pressure act.
  • force-free unexpanded condition a condition is described, where generally only e.g. the weight force of the respective membrane loads the respective membrane.
  • the expanded condition of the exterior membrane defines the length, the diameter or preferably the area size of the exterior membrane in which expanded condition the exterior membrane reaches an expansion under regular operating conditions.
  • the expanded condition under regular operating conditions describes the elongation when the gas storage runs under regular operating conditions.
  • the regular operating condition particularly describes a pressure range of the gas in the storage volume (inner volume, outer volume) between which pressure range the gas storage and the membrane is designed for operation.
  • the regular operating conditions for a gas storage are defined e.g. in the specifications defined by a manufacturer of a respective gas storage.
  • the exterior membrane is stretched with the above described stretch ratio of more than 10% (1,1) in the operating condition, the exterior membrane is in other words stretched in comparison to its force-free unexpanded state. Hence, if the gas pressure in the storage volume is reduced due to a leakage in the exterior membrane, the pressure in the storage volume falls out of the pressure range defining the regular operating condition.
  • the exterior membrane Because the exterior membrane is stretched in the regular operating condition, the exterior membrane contracts due to a pressure reduction caused by leakage of the exterior membrane.
  • the contraction ability of the exterior membrane is necessary for maintaining a stability and an operation of the gas storage even if the blower for the support gas fails and/or the exterior membrane pressure leaks.
  • the exterior membrane adapts its shape to the shape of the interior membrane until the exterior membrane has a similar size and shape as the interior membrane, so that the exterior membrane contacts the interior membrane. By this contact, the exterior membrane seals the leakage of the interior membrane.
  • an operation of the gas storage is still possible at least with a reduced pressure, because the exterior membrane seals the leak of the interior membrane.
  • the stretch ratio of the exterior membrane is larger than 1, 1 for generating a proper contraction ability between a regular operating condition and a lower, non-regular operating condition.
  • the predetermined pressure value for defining a lower limit of the pressure range of the regular operating condition may be defined by a pressure difference between the pressure in the storage volume and the environment pressure (e.g. standard environment pressure of 1013 hPa according to International Standard Atmosphere (ISA)).
  • the pressure difference and thus the lower limit may be larger than approximately 1 mbar or more for the pressure range in the operating conditions.
  • the stretch ratio is a measure of the extensional or normal strain of a differential line element or of a differential area of an elemental area.
  • the area size of the exterior or interior membrane may be illustrated and calculated by a surface integral that is taken over the surface of the exterior or interior membrane.
  • curved surfaces of the exterior membrane that describes e.g. a shape of half hollow ball may be defined and calculated as well, so that the stretch ratio may be defined.
  • the stretch ratio may as well be expressed by a ratio between a length of the exterior membrane along its surface between the expanded condition under regular operating condition and the force-free unexpanded condition.
  • the length of a membrane may be defined by a length of a line between two mounting points at which the membrane is fixed to e.g. a sidewall or a ground plate of the storage.
  • the length of the line between the two mounting points may be calculated by a line integral.
  • the connection line along the surface of the exterior membrane between the mounting points may form for example a curved shape, such as a parable or a half circle, for example.
  • the ratio between the lengths along the surface of the exterior membrane in the expanded condition under regular operating condition into the length of a line on the surface of the exterior membrane in the force-free unexpanded condition may define the stretch ratio as well.
  • the stretch ratio for the exterior and/or interior membrane according to the present invention is approximately more than 1, 1.
  • the stretch ratio of the exterior membrane for the pressure in the operating condition is between approximately 1, 1 and approximately 4, and more particularly between approximately 2 and approximately 3.
  • the above described values for the stretch ratio of the exterior and/or interior membrane may be valid at ambient temperatures of approximately -40°C to approximately 100°C, and more particularly between approximately -20°C to approximately 70°C.
  • the exterior membrane and/or the interior membrane may in particular be made of a fibre-free material, i.e. the membrane is not made of a material with inductile fibres.
  • the exterior and/or the interior membrane is made of a foil-like material.
  • the material of the exterior membrane and/or the interior may be an elastomer and/or a thermoplastic elastomer, so that a shape and an area size of the exterior membrane and/or the interior membrane is adaptable to a pressure of the gaseous medium in the outer volume and/or inner volume, respectively.
  • the exterior and/or the interior membrane may cover an area surface between 150 m 2 (square meter) and 1300 m 2 (square meter).
  • Interior and/or exterior membranes according to the present invention comprise a width or a diameter of the gas storage of approximately 15 m to approximately 45 m (meter) or more.
  • the material of the exterior membrane and/or the interior membrane is an elastomer or a thermoplastic elastomer, in particular a synthetic rubber.
  • the material of the exterior membrane and/or the interior membrane is ethylene propylene diene monomer (EPDM).
  • EPDM is a type of synthetic rubber and an elastomer.
  • An EPDM elastomer is usable in a temperature range of approximately -50°C to approximately 110°C without failing.
  • the exterior membrane and/or the interior membrane is formed homogeneous.
  • the exterior membrane may be formed of one piece or a plurality of sub-pieces, wherein in the force-free unexpanded condition, the exterior membrane may extend along a plane.
  • the dome-like shape of the exterior membrane is formed by a stretching of the exterior membrane if the pressure in the outer volume increases.
  • stiff and non-stretchable membranes are used, so that the membranes have to be formed in the final shape e.g. in the dome-like shape of the membrane.
  • the conventional membranes have to be tailored and provided with a plurality of seams, which leads to higher manufacturing costs and manufacturing time.
  • the stretchable membrane in the original and unstretched state, the stretchable membrane may be plane, i.e. with a flat and substantial two dimensional shape.
  • the curvature in an operating state of the gas storage is achieved by stretching the stretchable membrane due to a respective gas pressure in the storage volume. Hence, tailoring of the exterior or interior membrane is easy.
  • the covering further comprises an outer support structure.
  • the outer support structure is mounted over the exterior membrane, so that the exterior membrane is alignable at the outer support structure when the exterior membrane forms a predetermined shape and/or expands due to the gas pressure in the storage volume exceeding a predetermined pressure value. If the exterior membrane is pressed and aligned against the outer support structure, a load transmission between the exterior membrane and the outer support structure is generated, so that the outer support structure is able to restrain the exterior membrane.
  • the outer support structure comprises elongated restraining elements, particularly cables, belts or ropes or a (fine meshed) mesh.
  • the mesh has mesh openings, wherein each mesh opening is formed with a size such that sub-portions of the exterior membrane are prevented from expanding through the mesh opening when the gas pressure in the storage volume exceeds a predetermined pressure value, so that the gas pressure is within a pressure range of the operating conditions of the gas storage.
  • the storage further comprises a ground plate and a sidewall mounted to the ground plate.
  • the exterior membrane, the interior membrane and/or the supporting structure is/are mounted to the sidewall so that the storage volume is enveloped by the sidewall, the exterior membrane, the further interior membrane and the ground plate.
  • the exterior membrane and/or further interior membrane is mounted to an edge of a hole in a ground (e.g. a syncline), so that the storage volume is formed by the exterior membrane and a surface of the hole in the ground.
  • the interior membrane is mounted for example to the ground plate or the sidewall of the storage and envelops an inner volume of the storage volume, where the industrial gas component is stored.
  • the interior membrane may be made of an elastomeric material, so that the shape and the size of the interior membrane is adaptable to a pressure of the gaseous medium and the storage volume, e.g. to a pressure difference between the industrial gas in the inner volume and a pressure of the support gas component in the outer volume.
  • the interior membrane may have the same properties and the same material as the exterior membrane as described above.
  • the material of the interior membrane is ethylene propylene diene monomer (EPDM).
  • the shape and the position of the interior membrane may be kept homogeneous, i.e. without foldings and pocket-like curvatures in the force-free unexpanded condition, even if the pressure in the inner volume decreases.
  • the interior membrane contracts without becoming flabby, folded and inhomogeneous and without leaving its defined shape.
  • the interior membrane does not form foldings and pockets for example, but keeps a homogeneous surface, such as a half ball-shaped surface.
  • the inner volume may be determined by measuring the distance between the exterior membrane and the interior membrane. These measurements may be distorted if the interior membrane forms foldings, for example.
  • the storage further comprises a support gas supply unit which is installed in such a way that the support gas is supplied into the outer volume for adjusting a predetermined support gas pressure in the outer volume.
  • the storage further comprises an inner support structure which is installed to the storage in such a way that the interior membrane is aligned at the inner support structure if the interior membrane contracts due to a gas pressure in the inner volume falls below a predetermined pressure value.
  • the storage is free of the inner support structure so that the interior membrane is freely movable even when the interior membrane contracts due to a gas pressure in the inner volume falling below the predetermined pressure value.
  • the exterior membrane has a material with an ultimate elongation of more than 100% and is formed for being expandable and shrinkable according to the pressure of the support gas in the outer volume. If the gas pressure in the outer volume decreases, the exterior membrane shrinks and reduces its area size, so that the outer volume is reduced. Hence, the pressure in the outer volume is kept in between predetermined pressure ranges due to the reduced area size of the exterior membrane. Thereby, a sufficient tension of the exterior membrane is still provided that prevents the exterior membrane from leaving its homogeneous shape. In other words, due to the stretch and expanding properties of the exterior membrane, the area size of the exterior membrane is adaptable and amendable to the respective pressure of a gaseous medium in the storage volume. Hence, if a tension of the exterior membrane is provided, e.g. fluttering of the exterior membrane in the wind may be prevented.
  • the storage further comprises a level indicator for measuring the storage volume.
  • the level indicator may measure the storage volume for example by measuring the position of (i.e. a predetermined point on) the interior membrane and/or the exterior membrane by an ultrasonic measurement or by measuring the differential pressure between the inner pressure in the inner volume and the pressure in the outer volume.
  • the ultrasonic level indicator may be mounted to the top of the exterior membrane, so that the distance to the ground, to the biomass in the storage or to the distance to the interior membrane may be measured.
  • the storage for storing a gaseous medium comprises an interior membrane for at least partially enveloping the inner volume into which industrial gas is storable and a gas supply unit which is connected to the inner volume for supplying support gas to the inner volume, so that the gas pressure in the inner volume is prevented from falling below a predetermined nominal gas pressure and/or a position of the interior membrane is prevented from falling below a predefined position limit.
  • the support gas may be selected from one of the group consisting of inert gases, natural gases, helium gases, halogen gases and air. Moreover, the support gas may be an industrial gas which is of the same condition as the industrial gas regularly stored in the storage.
  • the support gas is fed to the storage volume, so that the gas pressure in the storage volume increases above the nominal gas pressure.
  • the supply unit prevents the membrane from folding and losing its tension.
  • the gaseous medium in the storage volume will be mixed with the support gas supplied by the gas supply unit.
  • the storage comprising the membrane and the gas supply unit is a storage as described above.
  • Fig. 1 shows a gas storage for a gaseous medium comprising sidewalls to which a covering is mounted, according to an exemplary embodiment of the present invention
  • Fig. 2 shows a gas storage with membranes mounted to a ground plate according to an exemplary embodiment of the present invention
  • Figs. 3 and 4 show a storage comprising elongated restraining elements according to exemplary embodiments of the present invention
  • Fig. 5 to Fig. 10 show conventional gas storages of the prior art.
  • Fig. 1 shows a storage 100 for a gaseous medium.
  • the storage 100 comprises a covering with an interior membrane 102 and an exterior membrane 101.
  • the interior membrane 102 is mounted to the gas storage for at least partially enveloping an inner volume Vs,i of the storage 100 for storing industrial gas.
  • the exterior membrane 101 is mounted to the gas storage 100, wherein the exterior membrane 101 covers the interior membrane 101 in such a way that an outer volume Vs,o for storing support gas is generated between the exterior membrane 101 and the interior membrane 102.
  • the exterior membrane 101 comprises a material with an ultimate elongation of more than 100%.
  • the exterior membrane 101 may be made of an elastomeric material, so that the shape and an area size of the exterior membrane 101 are adaptable to a pressure of the gaseous medium in the storage volume Vs.
  • the exterior membrane 101 is formed in such a way that an area of the exterior membrane 101 has a stretch ratio between an expanded condition under regular operating conditions of the exterior membrane 101 and a force-free unexpanded condition of the exterior membrane 101 of more than 1,1.
  • an interior membrane 102 is mounted.
  • the interior membrane 102 is mounted in such a way that the interior membrane 102 divides the storage volume Vs in the inner volume Vs,i for storing an industrial gas of the gaseous medium and the outer volume Vs,o for storing the support gas.
  • the outer volume Vs,o is generated between the exterior membrane 101 and the interior membrane 102.
  • the industrial gas may comprise for example a biogas, a natural gas or liquid gas.
  • the support gas may be for example an inert gas, a helium gas or air.
  • the interior membrane 102 may have the same (material) properties as the exterior membrane 101.
  • the exterior membrane 101 is shown in an expanded condition 101a (shown with the solid line in Fig. 1 ). With the dotted line shown in Fig. 1 , a less expanded condition 101b in comparison to the expanded condition 101a of the exterior membrane 101 is shown. If the gas storage operates in a regular operating condition, the expanded condition 101a and the less expanded condition 101b may be formed by the gas pressure in the storage volume Vs, in particular by the support gas pressure in the outer volume Vs,o.
  • the exterior membrane 101 has a tension of the surface, so that e.g. foldings may be prevented.
  • the exterior membrane 101 may be fixed to a side wall 104 or a ground plate 103 of the storage 100.
  • a for calculating the stretch ratio it is also possible to take the lengths of the line between the first mounting point 110 and the second mounting point 111.
  • the stretch ratio may then be calculated by the ratio between the length I of the exterior membrane 101 in the expanded condition under regular operating conditions and the length L of the exterior membrane 101 in the force-free unexpanded condition.
  • Fig. 1 shows furthermore the storage 100 with the sidewall 104 and the ground plate 103.
  • the storage volume Vs is enveloped by the sidewall 104, the ground plate 103 and the exterior membrane 101.
  • an inner support structure 106 may be installed into inner volume Vs,i of the storage 100.
  • the inner support structure 106 may comprise one or more supporting masts that support the interior membrane 102.
  • the inner support structure 106 may comprise a plurality of supporting belts or cables onto which the interior membrane 102 may be aligned if the gas pressure in the inner volume Vs,i fall below the nominal gas pressure value.
  • a support gas supply unit 105 may be installed and connected to the storage 100.
  • the support gas supply unit 105 supplies support gas into the outer volume Vs,o.
  • a pressure in the outer volume Vs,o may be kept generally in between predetermined pressure ranges even when the outer volume Vs,o increases due to a contraction of the interior membrane 102 and due to a movement of the interior membrane 102 in the direction to the ground plate 103.
  • the tension and the size of the exterior membrane 101 may be sustained by keeping the pressure in the outer volume Vs,o generally in between predetermined pressure ranges.
  • a gas supply unit 108 may be connected to the inner volume Vs,i, so that the pressure in the inner volume Vs,i is held above a nominal gas pressure in the inner volume Vs,i in order to prevent a further contraction of the interior membrane 102.
  • the support gas may be for instance an inert gas or an industrial gas for preventing a dilution of the stored industrial gas, for example.
  • a level indicator 107 may be mounted to a top of the exterior membrane 101.
  • the top of the exterior membrane 101 is in general the highest point of the storage 100.
  • the level indicator 107 may measure the inner volume Vs,i for example by measuring the position of the interior membrane 102 and/or the exterior membrane 101 by an ultrasonic measurement or by measuring the differential pressure between the inner pressure in the inner volume Vs,i and the pressure in the outer volume Vs,o.
  • the storage 100 in Fig. 1 further shows an outer support structure 112.
  • the exterior membrane 101 is expanded by the pressure in the outer volume Vs,o until the exterior membrane 101 aligns at the outer support structure 112.
  • the outer support structure 112 may comprise ropes or belts which e.g. forms a fine-meshed mesh.
  • Fig. 2 shows a further exemplary embodiment of the storage 100, wherein the exterior membrane 101 and the interior membrane 102 are mounted directly to the ground plate 103.
  • the exterior membrane 100 is shown in an expanded condition 101a and in a lesser expanded condition 101b. Furthermore, below the exterior membrane 101, the interior membrane 102 is mounted. Between the ground plate 103 and the interior membrane 102 the inner volume Vs,i of the storage volume Vs is generated. In the inner volume Vs,i the industrial gas is stored.
  • the support gas supply unit 105 is shown which supplies support gas into the outer volume Vs,o, so that a minimum gas pressure inside the outer volume Vs,o will not be under-run. Hence, a minimal tension of the exterior membrane 101 may be sustained, so that a deformation and a forming of pockets or foldings are prevented.
  • a level indicator 107 may be mounted to the top of the exterior membrane 101.
  • Fig. 3 shows a storage 100 with the exterior membrane 101, wherein elongated restraining elements 301 of an outer support structure 112 are mounted to the covering of the storage 100.
  • the elongated restraining elements 301 are for example flexible ropes, belts or cables.
  • the elongated restraining elements 301 are mounted over the exterior membrane 101, so that the exterior membrane 101 is alignable at the support structure when the exterior membrane 101 expands due to the gas pressure in the storage volume Vs exceeding a predetermined pressure value.
  • the exterior membrane 101 may be reinforced by the elongated restraining elements 301 of the outer support structure 112.
  • the elongated restraining elements 301 may form various patterns and may comprise different extension directions. As shown in Fig. 3 , the exterior membrane 101 forms e.g. a hollow half ball shape, wherein the elongated restraining elements 301 run along great circles along the half ball shape and cross each other in one point, in particular at the top level of the exterior membrane 101, where the level indicator 107 is installed. Hence, the angle ⁇ between the two crossing elongated restraining elements 301 may be defined by e.g. approximately 10° to approximately 90° degree.
  • Fig. 4 shows a different run of the elongated restraining elements 301 in comparison to the run of the elongated restraining elements 301 of Fig. 3 .
  • the crossing elongated restraining elements 301 comprise an angle ⁇ between each other of for example approximately 40° to approximately 140°.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP11159665A 2011-02-25 2011-03-24 Doppelmembransgasspeicher mit Innen- und Außenmembran Withdrawn EP2492576A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP11159665A EP2492576A1 (de) 2011-02-25 2011-03-24 Doppelmembransgasspeicher mit Innen- und Außenmembran
PCT/EP2012/053110 WO2012113888A1 (en) 2011-02-25 2012-02-23 Double membrane gas storage with an interior and an exterior membrane

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11156098 2011-02-25
EP11159665A EP2492576A1 (de) 2011-02-25 2011-03-24 Doppelmembransgasspeicher mit Innen- und Außenmembran

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112797307A (zh) * 2020-12-30 2021-05-14 新启时代(北京)材料科技有限公司 一种复合材料内胆及其制作方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115218111B (zh) * 2022-07-06 2024-02-13 西安热工研究院有限公司 一种基于密封膜自锁式锚固的重力压缩空气储气库

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Publication number Priority date Publication date Assignee Title
AT388158B (de) * 1985-01-21 1989-05-10 Sattler Textilwerke Gasspeicher
EP0333698A2 (de) * 1988-03-17 1989-09-20 Sattler Textilwerke Ohg Gasspeicher
DE202005011689U1 (de) * 2005-07-21 2005-09-29 Schmack Biogas Ag Gasverschluss
DE102009003696A1 (de) * 2009-03-30 2010-10-07 Contitech Elastomer-Beschichtungen Gmbh Membran, insbesondere Gasspeichermembran

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT388158B (de) * 1985-01-21 1989-05-10 Sattler Textilwerke Gasspeicher
EP0333698A2 (de) * 1988-03-17 1989-09-20 Sattler Textilwerke Ohg Gasspeicher
DE202005011689U1 (de) * 2005-07-21 2005-09-29 Schmack Biogas Ag Gasverschluss
DE102009003696A1 (de) * 2009-03-30 2010-10-07 Contitech Elastomer-Beschichtungen Gmbh Membran, insbesondere Gasspeichermembran

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112797307A (zh) * 2020-12-30 2021-05-14 新启时代(北京)材料科技有限公司 一种复合材料内胆及其制作方法
CN112797307B (zh) * 2020-12-30 2022-07-12 新启时代(北京)材料科技有限公司 一种复合材料内胆及其制作方法

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