EP0978682B1 - Apparatus for providing cryogenic liquid - Google Patents

Apparatus for providing cryogenic liquid Download PDF

Info

Publication number
EP0978682B1
EP0978682B1 EP99114326A EP99114326A EP0978682B1 EP 0978682 B1 EP0978682 B1 EP 0978682B1 EP 99114326 A EP99114326 A EP 99114326A EP 99114326 A EP99114326 A EP 99114326A EP 0978682 B1 EP0978682 B1 EP 0978682B1
Authority
EP
European Patent Office
Prior art keywords
cryogenic liquid
line
consumer
buffer
line part
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
EP99114326A
Other languages
German (de)
French (fr)
Other versions
EP0978682A3 (en
EP0978682A2 (en
Inventor
Ottmar Tallafus
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.)
SAUERSTOFFWERK FRIEDRICH GUTTROFF GmbH
Original Assignee
SAUERSTOFFWERK FRIEDRICH GUTTROFF GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7876482&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0978682(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by SAUERSTOFFWERK FRIEDRICH GUTTROFF GmbH filed Critical SAUERSTOFFWERK FRIEDRICH GUTTROFF GmbH
Publication of EP0978682A2 publication Critical patent/EP0978682A2/en
Publication of EP0978682A3 publication Critical patent/EP0978682A3/en
Application granted granted Critical
Publication of EP0978682B1 publication Critical patent/EP0978682B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • F17C7/02—Discharging liquefied gases
    • F17C7/04—Discharging liquefied gases with change of state, e.g. vaporisation
    • 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
    • F17C2205/0323—Valves
    • 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
    • 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
    • F17C2250/0439—Temperature

Definitions

  • the invention relates to a device for providing a cryogenic liquid according to the preamble of claim 1, with a storage tank and a supply line, by means of which the cryogenic liquid is passed to a consumer.
  • cryogenic Liquid consuming processes such as tumblers and cutters for Treatment of meat or cooling and frost systems of the case.
  • the cryogenic liquid such as liquid nitrogen (LN 2 ) is thereby provided in a special large-volume storage tank, which is regularly replenished by a company delivering the cryogenic liquid, if necessary.
  • a storage tank is about 2000 to 50,000 liters of this cryogenic liquid.
  • the storage tanks Because of the size of the storage tank or because of the delivery of Cryogenic liquid with special vehicles, the storage tanks must almost always in be arranged at a greater distance from the consumer. The length of the supply line from the storage tank to the consumer can therefore be up to 200 meters.
  • cryogenic liquid per unit time not very large. Frequently, the cryogenic liquid is also in the consumer Supplied to intervals. The cryogenic liquid supplied to the consumer is located therefore often a long time in the supply line.
  • the cryogenic liquid in the supply line does not overheat and in the gaseous state passes, it is necessary to supply the lead with a thermal insulation to provide.
  • insulation costs may amount to approximately DM 800.00 to DM 1,000.00 per meter.
  • a cheaper variant of the insulation is to supply the lead with highly effective To wrap insulating materials.
  • the supply line can still with rock wool be sheathed. With such insulation, however, the costs can always still about DM 500.00 per meter.
  • From US-A-5,771,946 is an arrangement for filling a motor vehicle tank known with cryogenic liquid.
  • the cryogenic Liquid from a primary tank fed to a heat exchanger in which the cryogenic Liquid is heated to saturation. After that she becomes one Car tank headed.
  • the heated cryogenic liquid can first be passed to a cache, by means of a Pressure compensation can be made when the pressure in the motor vehicle tank due to the heating of the cryogenic liquid is greater than in the supply line. Due to the pressure in the motor vehicle tank, the warm cryogenic fluid flows in the cache, where they are with by means of the heat exchanger heated but still cold cryogenic liquid from the primary tank mixed. If the overpressure in the motor vehicle tank has diminished, the motor vehicle tank will become filled with cryogenic liquid, the buffer is constantly Cryogenic liquid is supplied from the primary tank via the heat exchanger. Give advice on avoiding heating of the cryogenic liquid do not refer to the document.
  • a method for transferring a liquefied Gas known in which the liquefied gas is initially a buffer is supplied.
  • the cache then becomes mobile containers fed.
  • the liquefied gas is compressed to a pressure of about 10 to 11 atmospheres, where it heats up to a temperature of about 50 degrees Celsius. Notes on The avoidance of heating of the liquefied gas can be found in the document do not remove.
  • US-A-5,231,838 discloses a refueling station for liquefied gas. in which the liquefied gas from a reservoir via a valve in a buffer is directed.
  • the valve When refueling a motor vehicle, the valve is closed and the pressure in the buffer increases so much that it is greater than the pressure in the motor vehicle tank. After the refueling process is completed, is the pressure in the buffer again lower than the pressure in the storage tank, so that After opening the valve, liquid gas can again flow into the buffer.
  • Advice on avoiding heating of liquefied gas during refueling a motor vehicle can not be found in the document.
  • LPG is from a low-lying reservoir brought to a higher level by means of a gas pump, from which it a liquid pump with gradient tapers.
  • the means of the gas pump from the Steam room of the reservoir extracted vapors are fed to an injector, which is arranged in an intermediate container and between the reservoir and the higher level creates a pressure difference among which we kung the liquefied gas is conveyed from the reservoir to the higher level.
  • Advice on avoiding heating of the liquefied gas during refilling do not refer to the document.
  • a device for transferring liquefied combustible gases known in which the container to be filled initially overfilled and then the amount of liquid exceeding its permitted filling by reversing the liquid flow in the delivery line from him into an intermediate container is transferred.
  • the intermediate container is arranged in a line part, at the next filling so under the action of the transfer pump is that the intermediate container is forcibly emptied.
  • Evidence of avoidance a warming of the liquefied gas during refilling can be the document do not remove.
  • DE 197 04 362 C1 which is to be specified as the next state of the art, is a refueling device for cryogenic fuels in which, within a first storage container, a second storage container is arranged.
  • the volume of the second storage tank is smaller than that Volume of the first storage tank and equal to or greater than the volume the or the storage container of the refueling means to be refueled by the refueling device Vehicle.
  • a buffer is provided, which via a first Conduction part is connected to the storage tank and a second line part connected with the consumer.
  • the cache is similar Way as the storage tank is thermally insulated.
  • the cache whose capacity is usually only a fraction the capacity of the storage tank corresponds, can be because of its low Easily arrange size near the consumer.
  • the first line part, by means of which the buffer is connected to the storage tank is accordingly very long. Regularly, the length of the second line part less than half the length of the first line part. Often it is only a quarter or an eighth. But it can also be less than a tenth.
  • the inventive arrangement it is possible in an advantageous manner, it to refrain from isolating the first line part.
  • the first line part needs thus no longer show any special isolation.
  • the heat loss of the first Line parts can be greater than 20 watts per meter. He can, for example, 30 Watt per meter or even greater than 35 watts per meter, for example 40 Watt per meter be, usually the first line part is possibly with a Protective insulation are provided. So he can with an insulation against corrosion or mechanical damage or protection against contact have the cold line. It only needs the second, very short line part to be isolated. Because the cryogenic liquid supplied to the consumer is in front of the feed only in the second line part. The thermal conductivity The isolation of the second line part, for example, 1 to 2 watts per Meters.
  • the second line part with be provided an insulation.
  • the insulation depends on how much liquid is supplied to the consumer per unit time. Is the amount supplied low, If a very good insulation must be chosen, that is the one supplied to the consumer Amount of liquid large, are not so high isolation requirements too put. Because of the brevity of the second part of the line can even in special cases be completely dispensed insulation of the second line part.
  • the first part of the line does not have to be heat-insulated, a standard line can be used be resorted to. This results in a very large cost advantage. Because, due to the lack of thermal insulation, the first line part is not only easier to manufacture, but can also be much easier handle, so that the line installation much easier. In practice this results in a cost saving of about 90%.
  • the cross section of the first Line parts expediently chosen very large. So it is beneficial for the first pipe part to use a tube with a diameter of about 20 millimeters. But even with a tube with a diameter of 15 millimeters can the cryogenic liquid without significant heating by the first conduit part sent.
  • the first conduit part at its the buffer memory facing End has a branch, by means of which during a first filling phase can be derived in the first part of the pipe located gas. Because, although the cryogenic liquid in the first line part is also present does not heat up significantly during the filling of the buffer, so goes initially a very small part of the cryogenic in the first part of the conduit Liquid in the gaseous state over.
  • the time between two fillings of the cache can be between amount to a few hours and several days.
  • the first line part initially formed gas enters the buffer, it is over the branch past the cache for example, into the open directed. It is particularly expedient that the first line part in his the intermediate storage end facing a valve, by means of which the supply to the buffer during the phase while that in the first line part resulting gas bypassed the branch at the buffer is, is closable.
  • cryogenic liquid in the first line part After the branch is opened and the supply to the buffer closed is, is from the storage tank cryogenic liquid in the first line part directed. This initially escapes the located in the first line part Gas from the first line part. Through the from the storage tank in the first line part guided cryogenic liquid cools the first line part very quickly, whereby the subsequent cryogenic liquid is no longer significantly heated, and remains in its liquid state.
  • a temperature sensor is provided, by means of which the temperature of the at the buffer memory facing the end of the first line part located in the line medium is detected.
  • the Sensors can thus be determined whether there is still gas in the first line part or the first line part already completely back with a cryogenic liquid is filled. Is there again only cryogenic liquid in the first line part, so the supply to the buffer is opened by means of the valve and the branch is closed. As a result, passes through the first line part flowing cryogenic liquid very quickly in the buffer.
  • a storage tank 1 is connected via a first line part 2 'to a buffer 4.
  • the first conduit part 2 ' is connected via a main solenoid valve 10 to an outlet 11 of the storage tank 1.
  • LN 2 liquid nitrogen
  • the liquid nitrogen is passed through an inlet 12 into the storage tank 1.
  • the liquid nitrogen is regularly delivered by tank truck.
  • the storage tank 1 has a capacity of about 30,000 liters. To avoid heating of the liquid nitrogen, the storage tank 1 is thermally insulated by means of high vacuum.
  • the pressure in the storage tank 1 is about 1 to 15 bar, preferably 6 to 7 bar.
  • the first conduit part 2 ' may have a length of 50 to 200 meters.
  • a usual Length of the first line part 2 ' is 70 meters.
  • the cross section of the first line part 2 ' is about 200 square millimeters.
  • the first line part consists of a not heat insulated pipe.
  • a Temperature sensor 6 is provided, by means of which the temperature of the at the point in the first conduit part 2 'located medium can be detected.
  • the temperature can between minus 147 ° C and minus 196 ° C.
  • the first branch is with one Inlet 17, the second branch connected to a second outlet 16.
  • a first solenoid valve 7 In the first Branch are a second Solenoid valve 8 and a third solenoid valve 9 is arranged. Between the second Solenoid valve 8 and the third solenoid valve 9 is a first branch 5th
  • the buffer 4 has a capacity of about 600 liters. He is in similar manner as the storage tank 1 thermally insulated by high vacuum. At one first outlet 15 of the buffer 4, a second conduit part 2 "is connected. The second conduit part 2 '' is about 5 m long and thermally insulated. through of the second line part 2 ", a consumer 3 is connected to the buffer 4.
  • the consumer 3 for example, a tumbler or a refrigerator and Be frost system.
  • the amount of cryogenic liquid required by the consumer 3 can be about 5 to 10 liters per minute. It can be done in intervals of about 5 minutes Duration and 5 minutes break are fed.
  • the consumer 3 supplied cryogenic liquid is via the second line part 2 '' taken from the buffer 4.
  • the pressure in the buffer 4 is about 2 to 5 bar.
  • first is the fifth solenoid valve 13 open and the gas in the second line part 2 '' located the second branch 18 passed into the open.
  • the fifth solenoid valve 13 is closed and the fourth Solenoid valve open, so that the consumer 3 from the beginning cryogenic liquid can be supplied.
  • the main solenoid valve 10 When the buffer 4 is almost empty, the main solenoid valve 10 is opened. Since gas is formed in the first conduit part 2 'because of the long residence time has, first the second solenoid valve 8 is opened and the first solenoid valve. 7 and the third solenoid valve 9 is closed. This ensures that in the first conduit part 2 'located gas during a first filling phase on the first branch 5 flows into the open air. By the storage tank 1 in the first Conduction part 2 'conducted cryogenic liquid cools the first line part 2' very quickly, so that the liquid after a very short time no longer in the gaseous State passes.
  • the third solenoid valve 9 is initially opened, so that the of the in the buffer 4 conducted liquid displaced gas via the second outlet 16 and the first branch 5 can escape. After the buffer 4 sufficient is filled with cryogenic liquid, the first solenoid valve 7 and the third solenoid valve 9 closed again.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation By Low-Temperature Treatments (AREA)

Abstract

the cryogenic liquid supply circuit has a storage tank (1) connected to the user (3) by a pipeline (2',2''). An intermediate tank (4) is provided, the feed line to it from the main tank having a length twice of that from the auxiliary tank to the user. The pipeline has no special insulation.

Description

Die Erfindung betrifft eine Vorrichtung zur Bereitstellung einer kryogenen Flüssigkeit nach dem Oberbegriff des Anspruchs 1, mit einem Vorratstank und einer Zuleitung, mittels welcher die kryogene Flüssigkeit zu einem Verbraucher geleitet wird.The invention relates to a device for providing a cryogenic liquid according to the preamble of claim 1, with a storage tank and a supply line, by means of which the cryogenic liquid is passed to a consumer.

Derartige Vorrichtungen werden regelmäßig dort verwendet, wo eine größere Menge einer kryogenen Flüssigkeit benötigt wird. Dies ist insbesondere bei eine kryogene Flüssigkeit verbrauchenden Verfahren wie beispielsweise Tumbler und Kutter zur Behandlung von Fleisch oder Kühl- und Frostanlagen der Fall.Such devices are regularly used where a larger amount a cryogenic liquid is needed. This is especially true for a cryogenic Liquid consuming processes such as tumblers and cutters for Treatment of meat or cooling and frost systems of the case.

Die kryogene Flüssigkeit wie beispielsweise flüssiger Stickstoff (LN2) wird dabei in einem speziellen großvolumigen Vorratstank, welcher regelmäßig von einer die kryogene Flüssigkeit liefernden Firma bei Bedarf aufgefüllt wird, bereitgestellt. Üblicherweise faßt ein derartiger Vorratstank etwa 2000 bis 50.000 Liter dieser kryogenen Flüssigkeit.The cryogenic liquid such as liquid nitrogen (LN 2 ) is thereby provided in a special large-volume storage tank, which is regularly replenished by a company delivering the cryogenic liquid, if necessary. Typically, such a storage tank is about 2000 to 50,000 liters of this cryogenic liquid.

Wegen der Größe des Vorratstanks beziehungsweise wegen der Anlieferung der kryogenen Flüssigkeit mit Spezialfahrzeugen muß der Vorratstanks fast immer in größerer Entfernung vom Verbraucher angeordnet werden. Die Länge der Zuleitung vom Vorratstank zum Verbraucher kann daher bis zu 200 Meter betragen.Because of the size of the storage tank or because of the delivery of Cryogenic liquid with special vehicles, the storage tanks must almost always in be arranged at a greater distance from the consumer. The length of the supply line from the storage tank to the consumer can therefore be up to 200 meters.

Je nach Verbraucher ist die benötigte Menge an kryogener Flüssigkeit pro Zeiteinheit nicht sehr groß. Häufig wird die kryogene Flüssigkeit dem Verbraucher auch in Intervallen zugeführt. Die dem Verbraucher zugeführte kryogene Flüssigkeit befindet sich daher häufig längere Zeit in der Zuleitung.Depending on the consumer, the required amount of cryogenic liquid per unit time not very large. Frequently, the cryogenic liquid is also in the consumer Supplied to intervals. The cryogenic liquid supplied to the consumer is located therefore often a long time in the supply line.

Damit sich die kryogene Flüssigkeit in der Zuleitung nicht zu stark erwärmt und in den gasförmigen Zustand übergeht, ist es erforderlich, die Zuleitung mit einer Wärmeisolierung zu versehen. Es ist bekannt, die Zuleitung in einem Rohr zu führen, welches ein Hochvakuum aufweist. Bei einer derartigen Hochvakuum-Isolierung können Kosten entstehen in Höhe von etwa DM 800,00 bis DM 1.000,00 pro Meter. Eine preiswertere Variante der Isolierung ist es, die Zuleitung mit hoch wirksamen Isolierstoffen zu umhüllen. Zusätzlich kann die Zuleitung noch mit Gesteinswolle ummantelt werden. Bei einer derartigen Isolierung können die Kosten aber immer noch etwa DM 500,00 pro Meter betragen. Thus, the cryogenic liquid in the supply line does not overheat and in the gaseous state passes, it is necessary to supply the lead with a thermal insulation to provide. It is known to lead the supply line in a pipe, which has a high vacuum. In such a high vacuum insulation costs may amount to approximately DM 800.00 to DM 1,000.00 per meter. A cheaper variant of the insulation is to supply the lead with highly effective To wrap insulating materials. In addition, the supply line can still with rock wool be sheathed. With such insulation, however, the costs can always still about DM 500.00 per meter.

Aus der US-A-5,771,946 ist eine Anordnung zum Befüllen eines Kraftfahrzeugtanks mit kryogener Flüssigkeit bekannt. Bei der bekannten Vorrichtung wird die kryogene Flüssigkeit aus einem Primärtank einem Wärmetauscher zugeführt, in dem die kryogene Flüssigkeit bis zum Sättigungsgrad erwärmt wird. Danach wird sie in einen Kraftfahrzeugtank geleitet.From US-A-5,771,946 is an arrangement for filling a motor vehicle tank known with cryogenic liquid. In the known device, the cryogenic Liquid from a primary tank fed to a heat exchanger in which the cryogenic Liquid is heated to saturation. After that she becomes one Car tank headed.

Statt die erwärmte kryogene Flüssigkeit direkt in den Kraftfahrzeugtank zu leiten, kann sie zunächst in einen Zwischenspeicher geleitet werden, mittels dem ein Druckausgleich vorgenommen werden kann, wenn der Druck im Kraftfahrzeugtank aufgrund der Erwärmung der kryogenen Flüssigkeit größer ist als in der Zuführleitung. Aufgrund des Überdrucks im Kraftfahrzeugtank fließt die warme kryogene Flüssigkeit in den Zwischenspeicher, wo sie sich mit der zwar mittels des Wärmetauschers erwärmten aber dennoch kalten kryogenen Flüssigkeit aus dem Primärtank mischt. Hat sich der Überdruck im Kraftfahrzeugtank abgebaut, wird der Kraftfahrzeugtank mit kryogener Flüssigkeit gefüllt, wobei dem Zwischenspeicher ständig kryogene Flüssigkeit aus dem Primärtank über den Wärmetauscher zugeführt wird. Hinweise auf die Vermeidung einer Erwärmung der kryogenen Flüssigkeit lassen sich der Druckschrift nicht entnehmen.Instead of directing the heated cryogenic liquid directly into the vehicle tank, It can first be passed to a cache, by means of a Pressure compensation can be made when the pressure in the motor vehicle tank due to the heating of the cryogenic liquid is greater than in the supply line. Due to the pressure in the motor vehicle tank, the warm cryogenic fluid flows in the cache, where they are with by means of the heat exchanger heated but still cold cryogenic liquid from the primary tank mixed. If the overpressure in the motor vehicle tank has diminished, the motor vehicle tank will become filled with cryogenic liquid, the buffer is constantly Cryogenic liquid is supplied from the primary tank via the heat exchanger. Give advice on avoiding heating of the cryogenic liquid do not refer to the document.

Des weiteren ist aus der GB 609 829 A ein Verfahren zur Überführung eines verflüssigten Gases bekannt, bei welchem das verflüssigte Gas zunächst einem Zwischenspeicher zugeführt wird. Von dem Zwischenspeicher wird es dann mobilen Behältern zugeführt. Vor der Einleitung des verflüssigten Gases in den Zwischenspeicher wird das verflüssigte Gas auf einen Druck von etwa 10 bis 11 Atmosphären komprimiert, wobei es sich auf eine Temperatur von etwa 50 Grad Celsius erhitzt. Hinweise auf die Vermeidung einer Erwärmung des verflüssigten Gases lassen sich der Druckschrift nicht entnehmen.Furthermore, from GB 609 829 A a method for transferring a liquefied Gas known in which the liquefied gas is initially a buffer is supplied. The cache then becomes mobile containers fed. Before the introduction of the liquefied gas into the cache the liquefied gas is compressed to a pressure of about 10 to 11 atmospheres, where it heats up to a temperature of about 50 degrees Celsius. Notes on The avoidance of heating of the liquefied gas can be found in the document do not remove.

Darüber hinaus ist aus der US-A-5,231,838 eine Tankstation für Flüssiggas bekannt, bei welcher das Flüssiggas aus einem Vorratsbehälter über ein Ventil in einen Zwischenspeicher geleitet wird. Beim Betanken eines Kraftfahrzeugs wird das Ventil geschlossen und der Druck im Zwischenspeicher soweit erhöht, daß er größer ist als der Druck im Kraftfahrzeugtank. Nachdem der Tankvorgang abgeschlossen ist, ist der Druck im Zwischenspeicher wieder geringer als der Druck im Vorratstank, so daß nach Öffnen des Ventils wieder Flüssiggas in den Zwischenspeicher strömen kann. Hinweise auf die Vermeidung einer Erwärmung des Flüssiggases bei der Betankung eines Kraftfahrzeuges lassen sich der Druckschrift nicht entnehmen.Moreover, US-A-5,231,838 discloses a refueling station for liquefied gas. in which the liquefied gas from a reservoir via a valve in a buffer is directed. When refueling a motor vehicle, the valve is closed and the pressure in the buffer increases so much that it is greater than the pressure in the motor vehicle tank. After the refueling process is completed, is the pressure in the buffer again lower than the pressure in the storage tank, so that After opening the valve, liquid gas can again flow into the buffer. Advice on avoiding heating of liquefied gas during refueling a motor vehicle can not be found in the document.

Darüber hinaus ist aus der DE 699711 C ein Verfahren zum Umfüllen von verflüssigten brennbaren Gasen bekannt, bei welchem zunächst der Flüssigkeitsrest eines zu füllenden Behälters in einen Zwischenbehälter übergeführt wird. Danach wird der Zwischenbehälter aus einem Vorratsbehälter mit verflüssigtem Gas aufgefüllt und dann der zu füllende Behälter aus dem Zwischenbehälter gefüllt. Hinweise auf die Vermeidung einer Erwärmung des verflüssigten Gases beim Tanken lassen sich der Druckschrift nicht entnehmen.In addition, from DE 699711 C a method for transferring liquefied combustible gases known in which initially the liquid residue of a to be filled container is transferred to an intermediate container. After that, the Intermediate container filled from a reservoir with liquefied gas and then filled the container to be filled from the intermediate container. Notes on the Avoiding heating of the liquefied gas when refueling can be Do not remove the document.

Ein weiteres Verfahren zum Umfüllen von verflüssigten Gasen ist aus der DE 673594 C bekannt. Bei diesem Verfahren wird Flüssiggas aus einem tiefliegenden Vorratsbehälter mittels einer Gaspumpe auf ein höheres Niveau gebracht, von dem aus es einer Flüssigkeitspumpe mit Gefälle zuläuft. Die mittels der Gaspumpe aus dem Dampfraum des Vorratsbehälters abgesaugten Dämpfe werden einem Injektor zugeführt, welcher in einem Zwischenbehälter angeordnet ist und zwischen dem Vorratsbehälter und dem höheren Niveau eine Druckdifferenz erzeugt, unter deren Wir kung das Flüssiggas aus dem Vorratsbehälter auf das höhere Niveau gefördert wird. Hinweise auf die Vermeidung einer Erwärmung des Flüssiggases beim Umfüllen lassen sich der Druckschrift nicht entnehmen.Another method for transferring liquefied gases is known from DE 673594 C known. In this process, LPG is from a low-lying reservoir brought to a higher level by means of a gas pump, from which it a liquid pump with gradient tapers. The means of the gas pump from the Steam room of the reservoir extracted vapors are fed to an injector, which is arranged in an intermediate container and between the reservoir and the higher level creates a pressure difference among which we kung the liquefied gas is conveyed from the reservoir to the higher level. Advice on avoiding heating of the liquefied gas during refilling do not refer to the document.

Darüber hinaus ist aus der DE 725 581 C ein Verfahren zur Entleerung und zur Füllung von Verbrauchsbehältem mit Butan und anderen Flüssiggasen bekannt, welche bei tiefen Außentemperaturen einen zur Entleerung des Verbrauchsbehälters nicht ausreichenden Sättigungsdruck besitzen und deshalb durch Überführung von Stickstoff oder anderen permanenten Gasen, die bei der betreffenden tiefen Außentemperatur einen wesentlich höheren Sättigungsdruck aufweisen als das Flüssiggas aus einem besonderen Druckbehälter in den Verbrauchsbehälter aus diesem herausgedrückt werden, wobei das Flüssiggas vor Überfüllung in den Verbrauchsbehälter mit dem den Zusatzdruck liefemden permanenten Gas gesättigt wird. Das zur Sättigung des Flüssiggases dienende Gas in den Flüssigkeitsinhalt eines zwischen dem Lagerbehälter und dem zu füllenden Verbrauchsbehälter angeordneten Zwischenbehälter eingeleitet. Hinweise auf die Vermeidung einer Erwärmung des Flüssiggases bei der Füllung des Verbrauchsbehälters enthält die Druckschrift nicht.In addition, from DE 725 581 C a method for emptying and filling of consumer containers with butane and other liquefied gases known which at low outside temperatures for emptying the consumer tank not have sufficient saturation pressure and therefore by transfer of nitrogen or other permanent gases, at the particular low outside temperature have a much higher saturation pressure than the LPG a special pressure vessel in the consumption container pushed out of this be, with the liquefied gas from overfilling in the fuel tank with the additional pressure running permanent gas is saturated. That to the saturation the liquefied gas serving gas in the liquid content of a between the storage container and arranged to be filled consumer container intermediate container initiated. Advice on avoiding heating of liquefied gas when filling the consumer container, the document does not contain.

Darüber hinaus ist aus der DE 664322 C eine Einrichtung zum Umfüllen von verflüssigten brennbaren Gasen bekannt, bei der der zu füllende Behälter zunächst überfüllt und dann die seine zugelassene Füllung überschreitende Flüssigkeitsmenge durch Umkehr des Flüssigkeitsstromes in der Förderleitung aus ihm in einen Zwischenbehälter überführt wird. Der Zwischenbehälter ist in einem Leitungsteil angeordnet, der beim nächsten Füllvorgang derart unter der Einwirkung der Umfüllpumpe steht, daß der Zwischenbehälter zwangsläufig entleert wird. Hinweise auf die Vermeidung einer Erwärmung des Flüssiggases beim Umfüllen lassen sich der Druckschrift nicht entnehmen.In addition, from DE 664322 C a device for transferring liquefied combustible gases known in which the container to be filled initially overfilled and then the amount of liquid exceeding its permitted filling by reversing the liquid flow in the delivery line from him into an intermediate container is transferred. The intermediate container is arranged in a line part, at the next filling so under the action of the transfer pump is that the intermediate container is forcibly emptied. Evidence of avoidance a warming of the liquefied gas during refilling can be the document do not remove.

Aus der DE 197 04 362 C1, welche als nächsliegender Stand der Technick anzugeben ist, ist eine Betankungseinrichtung für kryogene Kraftstoffe bekannt, bei der innerhalb eines ersten Speicherbehälters ein zweiter Speicherbehälter angeordnet ist. Das Volumen des zweiten Speicherbehälters ist kleiner als das Volumen des ersten Speicherbehälters und gleich groß oder größer als das Volumen des oder der Speicherbehälter des mittels der Betankungseinrichtung zu betankenden Fahrzeugs. DE 197 04 362 C1, which is to be specified as the next state of the art, is a refueling device for cryogenic fuels in which, within a first storage container, a second storage container is arranged. The volume of the second storage tank is smaller than that Volume of the first storage tank and equal to or greater than the volume the or the storage container of the refueling means to be refueled by the refueling device Vehicle.

Es ist Aufgabe der Erfindung eine eingangs genannte Vorrichtung derart auszubilden, daß die Zuleitung im wesentlichen ohne aufwendige Isolierung auskommt.It is an object of the invention to form a device mentioned at the outset in such a way that that the lead essentially manages without expensive insulation.

Die Lösung dieser Aufgabe ergibt sich aus den Merkmalen des kennzeichnenden Teils des Anspruchs 1. Vorteilhafte Weiterbildungen der Erfindung ergeben sich aus den Unteransprüchen.The solution to this problem arises from the features of the characterizing Part of claim 1. Advantageous developments of the invention will become apparent the dependent claims.

Gemäß der Erfindung ist ein Zwischenspeicher vorgesehen, welcher über einen ersten Leitungsteil mit dem Vorratstank verbunden ist und über einen zweiten Leitungsteil mit dem Verbraucher verbunden ist. Der Zwischenspeicher ist in ähnlicher Weise wie der Vorratstank wärmeisoliert.According to the invention, a buffer is provided, which via a first Conduction part is connected to the storage tank and a second line part connected with the consumer. The cache is similar Way as the storage tank is thermally insulated.

Der Zwischenspeicher, dessen Fassungsvermögen regelmäßig nur einen Bruchteil des Fassungsvermögens des Vorratstanks entspricht, läßt sich wegen seiner geringen Größe mühelos in der Nähe des Verbrauchers anordnen. Hierdurch kann der zweite meistens wärmeisolierten Leitungsteil, mittels welchem der Verbraucher mit dem Zwischenspeicher verbunden ist, sehr kurz gehalten werden. Der erste Leitungsteil, mittels dem der Zwischenspeicher mit dem Vorratstank verbunden ist, ist dementsprechend sehr lang. Regelmäßig beträgt die Länge des zweiten Leitungsteils weniger als die Hälfte der Länge des ersten Leitungsteils. Häufig beträgt sie nur ein Viertel oder ein Achtel. Sie kann aber auch weniger als ein Zehntel betragen.The cache, whose capacity is usually only a fraction the capacity of the storage tank corresponds, can be because of its low Easily arrange size near the consumer. This allows the second mostly thermally insulated conduit part, by means of which the consumer with the cache is kept very short. The first line part, by means of which the buffer is connected to the storage tank is accordingly very long. Regularly, the length of the second line part less than half the length of the first line part. Often it is only a quarter or an eighth. But it can also be less than a tenth.

Durch die erfindungsgemäße Anordnung ist es in vorteilhafter Weise möglich, darauf zu verzichten, den ersten Leitungsteil zu isolieren. Der erste Leitungsteil braucht somit keine besondere Isolierung mehr aufzuweisen. Der Wärmeverlust des ersten Leitungsteils kann größer als 20 Watt pro Meter sein. Er kann beispielsweise 30 Watt pro Meter betragen oder sogar größer als 35 Watt pro Meter, beispielsweise 40 Watt pro Meter sein, In der Regel wird der erste Leitungsteil allenfalls mit einer Schutzisolierung versehen werden. So kann er mit einer Isolierung gegen Korrosion oder mechanische Beschädigungen versehen sein oder einen Schutz gegen Berühren der kalten Leitung aufweisen. Es braucht nur noch der zweite, sehr kurze Leitungsteil isoliert zu werden. Denn die dem Verbraucher zugeführte kryogene Flüssigkeit steht vor der Zuführung nur noch in dem zweiten Leitungsteil. Der Wärmeleitwert der Isolierung des zweiten Leitungsteils kann beispielsweise 1 bis 2 Watt pro Meter betragen.The inventive arrangement, it is possible in an advantageous manner, it to refrain from isolating the first line part. The first line part needs thus no longer show any special isolation. The heat loss of the first Line parts can be greater than 20 watts per meter. He can, for example, 30 Watt per meter or even greater than 35 watts per meter, for example 40 Watt per meter be, usually the first line part is possibly with a Protective insulation are provided. So he can with an insulation against corrosion or mechanical damage or protection against contact have the cold line. It only needs the second, very short line part to be isolated. Because the cryogenic liquid supplied to the consumer is in front of the feed only in the second line part. The thermal conductivity The isolation of the second line part, for example, 1 to 2 watts per Meters.

Damit die in dem zweiten Leitungsteil stehende kryogene Flüssigkeit sich nicht erwärmt und in den gasförmigen Zustand übergeht, sollte der zweite Leitungsteil mit einer Isolierung versehen werden. Die Isolierung hängt davon ab, wieviel Flüssigkeit pro Zeiteinheit dem Verbraucher zugeführt wird. Ist die zugeführte Menge gering, muß eine sehr gute Isolierung gewählt werden, ist die dem Verbraucher zugeführte Flüssigkeitsmenge groß, sind nicht so hohe Anforderungen an die Isolierung zu stellen. Wegen der Kürze des zweiten Leitungsteils kann in besonderen Fällen sogar gänzlich auf eine Isolierung des zweiten Leitungsteils verzichtet werden.So that the standing in the second conduit part cryogenic liquid does not heat and goes into the gaseous state, the second line part with be provided an insulation. The insulation depends on how much liquid is supplied to the consumer per unit time. Is the amount supplied low, If a very good insulation must be chosen, that is the one supplied to the consumer Amount of liquid large, are not so high isolation requirements too put. Because of the brevity of the second part of the line can even in special cases be completely dispensed insulation of the second line part.

Da der erste Leitungsteil keine Wärmeisolierung haben muß, kann auf eine Standardleitung zurückgegriffen werden. Hierdurch ergibt sich ein sehr großer Kostenvorteil. Denn, durch die fehlende Wärmeisolierung ist der erste Leitungsteil nicht nur einfacher herzustellen, sondern läßt sich darüber hinaus auch bedeutend einfacher handhaben, so daß sich die Leitungsinstallation wesentlich vereinfacht. In der Praxis ergibt sich dadurch eine Kosteneinsparung von ca. 90 %.Since the first part of the line does not have to be heat-insulated, a standard line can be used be resorted to. This results in a very large cost advantage. Because, due to the lack of thermal insulation, the first line part is not only easier to manufacture, but can also be much easier handle, so that the line installation much easier. In practice this results in a cost saving of about 90%.

Durch den ersten Leitungsteil fließt nur noch dann eine kryogene Flüssigkeit, wenn der Zwischenspeicher, nachdem er nahezu entleert wurde, wieder aufgefüllt wird. Beim Auffüllen kann eine große Menge Flüssigkeit pro Zeiteinheit durch den ersten Leitungsteil geschickt werden, so daß sich die Flüssigkeit nur kurzzeitig im ersten Leitungsteil befindet und somit keine Zeit hat, sich zu erwärmen.Only a cryogenic liquid flows through the first conduit part when the cache is refilled after it has almost been drained. When refilling, a large amount of liquid per unit of time may pass through the first Be sent line part, so that the liquid only briefly in the first Line part is located and thus has no time to warm up.

Um die Flüssigkeitsmenge pro Zeiteinheit zu vergrößern und damit die Verweilzeit der Flüssigkeit im ersten Leitungsteil zu verringern, wird der Querschnitt des ersten Leitungsteils zweckmäßigerweise sehr groß gewählt. So ist es vorteilhaft, für den ersten Leitungsteil ein Rohr mit einem Durchmesser von ca. 20 Millimeter zu verwenden. Aber auch bei einem Rohr mit einem Durchmesser von 15 Millimetern kann die kryogene Flüssigkeit ohne wesentliche Erwärmung durch den ersten Leitungsteil geschickt werden.To increase the amount of liquid per unit of time and thus the residence time reduce the liquid in the first conduit part, the cross section of the first Line parts expediently chosen very large. So it is beneficial for the first pipe part to use a tube with a diameter of about 20 millimeters. But even with a tube with a diameter of 15 millimeters can the cryogenic liquid without significant heating by the first conduit part sent.

Als besonders zweckmäßig hat sich eine Ausführungsform der Erfindung herausgestellt, bei der der erste Leitungsteil an seinem dem Zwischenspeicher zugewandten Ende eine Abzweigung aufweist, mittels welcher während einer ersten Füllphase sich in dem ersten Leitungsteil befindliches Gas abgeleitet werden kann. Denn, wenngleich sich auch die im ersten Leitungsteil befindliche kryogene Flüssigkeit während der Befüllung des Zwischenspeichers nicht wesentlich erwärmt, so geht anfänglich ein sehr kleiner Teil der sich im ersten Leitungsteil befindlichen kryogenen Flüssigkeit in den gasförmigen Zustand über.As a particularly useful embodiment of the invention has been found, in which the first conduit part at its the buffer memory facing End has a branch, by means of which during a first filling phase can be derived in the first part of the pipe located gas. Because, although the cryogenic liquid in the first line part is also present does not heat up significantly during the filling of the buffer, so goes initially a very small part of the cryogenic in the first part of the conduit Liquid in the gaseous state over.

Denn die Zeit zwischen zwei Füllvorgängen des Zwischenspeichers kann zwischen wenigen Stunden und mehreren Tagen betragen. Um zu verhindern, daß sich das im ersten Leitungsteil anfänglich entstandene Gas in den Zwischenspeicher gelangt, wird es über die Abzweigung am Zwischenspeicher vorbei beispielsweise ins Freie geleitet. Hierbei ist es besonders zweckmäßig, daß der erste Leitungsteil in seinem dem Zwischenspeicher zugewandten Ende ein Ventil aufweist, mittels dem die Zuführung zum Zwischenspeicher während der Phase, während der das im ersten Leitungsteil entstandene Gas über die Abzweigung am Zwischenspeicher vorbeigeleitet wird, verschließbar ist.Because the time between two fillings of the cache can be between amount to a few hours and several days. To prevent that in the first line part initially formed gas enters the buffer, it is over the branch past the cache for example, into the open directed. It is particularly expedient that the first line part in his the intermediate storage end facing a valve, by means of which the supply to the buffer during the phase while that in the first line part resulting gas bypassed the branch at the buffer is, is closable.

Nachdem die Abzweigung geöffnet und die Zuführung zum Zwischenspeicher geschlossen ist, wird vom Vorratstank kryogene Flüssigkeit in den ersten Leitungsteil geleitet. Hierdurch entweicht zunächst das in dem ersten Leitungsteil befindliche Gas aus dem ersten Leitungsteil. Durch die aus dem Vorratstank in den ersten Leitungsteil geleitete kryogene Flüssigkeit kühlt der erste Leitungsteil sehr schnell ab, wodurch sich die nachfolgende kryogene Flüssigkeit nicht mehr wesentlich erwärmt, und in ihrem flüssigen Zustand verbleibt.After the branch is opened and the supply to the buffer closed is, is from the storage tank cryogenic liquid in the first line part directed. This initially escapes the located in the first line part Gas from the first line part. Through the from the storage tank in the first line part guided cryogenic liquid cools the first line part very quickly, whereby the subsequent cryogenic liquid is no longer significantly heated, and remains in its liquid state.

Besonders vorteilhaft ist es, wenn ein Temperatursensor vorgesehen ist, mittels welchem die Temperatur des sich an dem Zwischenspeicher zugewandten Ende des ersten Leitungsteils in der Leitung befindlichen Mediums feststellbar ist. Mittels des Sensors kann somit festgestellt werden, ob sich im ersten Leitungsteil noch Gas befindet oder der erste Leitungsteil bereits wieder völlig mit einer kryogenen Flüssigkeit gefüllt ist. Befindet sich im ersten Leitungsteil bereits wieder nur kryogene Flüssigkeit, so wird die Zuführung zum Zwischenspeicher mittels des Ventils geöffnet und die Abzweigung geschlossen. Hierdurch gelangt die durch den ersten Leitungsteil fließende kryogene Flüssigkeit sehr schnell in den Zwischenspeicher.It is particularly advantageous if a temperature sensor is provided, by means of which the temperature of the at the buffer memory facing the end of the first line part located in the line medium is detected. By means of the Sensors can thus be determined whether there is still gas in the first line part or the first line part already completely back with a cryogenic liquid is filled. Is there again only cryogenic liquid in the first line part, so the supply to the buffer is opened by means of the valve and the branch is closed. As a result, passes through the first line part flowing cryogenic liquid very quickly in the buffer.

Weitere Vorteile der vorliegenden Erfindung ergeben sich aus der nachfolgenden Beschreibung eines besonderen Ausführungsbeispiels unter Bezugnahme auf die Zeichnung.Further advantages of the present invention will become apparent from the following Description of a particular embodiment with reference to the Drawing.

Es zeigt die einzige Figur eine erfindungsgemäße Anordnung.It shows the only figure an arrangement according to the invention.

Wie der Zeichnung entnommen werden kann, ist ein Vorratstank 1 über einen ersten Leitungsteil 2' mit einem Zwischenspeicher 4 verbunden. Der erste Leitungsteil 2' ist über ein Haupt-Magnetventil 10 mit einem Auslaß 11 des Vorratstanks 1 verbunden. Im Vorratstank 1 befindet sich flüssiger Stickstoff (LN2). Der flüssige Stickstoff wird über einen Einlaß 12 in den Vorratstank 1 geleitet. Der flüssige Stickstoff wird regelmäßig mittels Tanklastwagen angeliefert. Der Vorratstank 1 hat ein Fassungsvermögen von etwa 30.000 Litern. Zur Vermeidung einer Erwärmung des flüssigen Stickstoffs ist der Vorratstank 1 mittels Hochvakuum wärmeisoliert. Der Druck im Vorratstank 1 beträgt etwa 1 bis 15 bar, vorzugsweise 6 bis 7 bar.As can be seen from the drawing, a storage tank 1 is connected via a first line part 2 'to a buffer 4. The first conduit part 2 'is connected via a main solenoid valve 10 to an outlet 11 of the storage tank 1. In the storage tank 1 is liquid nitrogen (LN 2 ). The liquid nitrogen is passed through an inlet 12 into the storage tank 1. The liquid nitrogen is regularly delivered by tank truck. The storage tank 1 has a capacity of about 30,000 liters. To avoid heating of the liquid nitrogen, the storage tank 1 is thermally insulated by means of high vacuum. The pressure in the storage tank 1 is about 1 to 15 bar, preferably 6 to 7 bar.

Der erste Leitungsteil 2' kann eine Länge von 50 bis 200 Meter haben. Eine übliche Länge des ersten Leitungsteils 2' ist 70 Meter. Der Querschnitt des ersten Leitungsteils 2' beträgt etwa 200 Quadratmillimeter. Der erste Leitungsteil besteht aus einem nicht wärmeisolierten Rohr.The first conduit part 2 'may have a length of 50 to 200 meters. A usual Length of the first line part 2 'is 70 meters. The cross section of the first line part 2 'is about 200 square millimeters. The first line part consists of a not heat insulated pipe.

Am dem Zwischenspeicher 4 zugewandten Ende des ersten Leitungsteils 2' ist ein Temperatursensor 6 vorgesehen, mittels dem die Temperatur des sich an der Stelle im ersten Leitungsteil 2' befindlichen Mediums feststellbar ist. Die Temperatur kann zwischen minus 147 ° C und minus 196 ° C liegen. Der erste Leitungsteil 2' teilt sich an seinem dem Zwischenspeicher zugewandte Ende in zwei Zweige auf. Beide Zweige sind mit dem Zwischenspeicher 4 verbunden. Der erste Zweig ist mit einem Einlaß 17, der zweite Zweig mit einem zweiten Auslaß 16 verbunden. Im ersten Zweig ist ein erstes Magnetventil 7 angeordnet. Im zweiten Zweig sind ein zweites Magnetventil 8 und ein drittes Magnetventil 9 angeordnet. Zwischen dem zweiten Magnetventil 8 und dem dritten Magnetventil 9 befindet sich eine erste Abzweigung 5.At the latch 4 facing the end of the first line part 2 'is a Temperature sensor 6 is provided, by means of which the temperature of the at the point in the first conduit part 2 'located medium can be detected. The temperature can between minus 147 ° C and minus 196 ° C. The first line part 2 'splits at its end facing the buffer memory in two branches. Both Branches are connected to the buffer 4. The first branch is with one Inlet 17, the second branch connected to a second outlet 16. In the first Branch is arranged a first solenoid valve 7. In the second branch are a second Solenoid valve 8 and a third solenoid valve 9 is arranged. Between the second Solenoid valve 8 and the third solenoid valve 9 is a first branch 5th

Der Zwischenspeicher 4 hat ein Fassungsvermögen von etwa 600 Liter. Er ist in ähnlicher Weise wie der Vorratstank 1mittels Hochvakuum wärmeisoliert. An einem ersten Auslaß 15 des Zwischenspeichers 4 ist ein zweiter Leitungsteil 2" angeschlossen. Der zweite Leitungsteil 2'' ist etwa 5 m lang und wärmeisoliert. Mittels des zweiten Leitungsteils 2" ist ein Verbraucher 3 mit dem Zwischenspeicher 4 verbunden. Der Verbraucher 3 kann beispielsweise ein Tumbler oder eine Kühl- und Frostanlage sein. Die vom Verbraucher 3 benötigte Menge an kryogener Flüssigkeit kann etwa 5 bis 10 Liter pro Minute betragen. Sie kann in Intervallen von etwa 5 Minuten Dauer und 5 Minuten Pause zugeführt werden. Zur geregelten Zuführung von kryogener Flüssigkeit zum Verbraucher 3 ist ein viertes Magnetventil 14 im zweiten Leitungsteil 2'' angeordnet. An seinem dem Verbraucher 3 zugewandten Ende weist der zweite Leitungsteil 2'' eine zweite Abzweigung 18 auf, in welcher ein fünftes Magnetventil 13 angeordnet ist.The buffer 4 has a capacity of about 600 liters. He is in similar manner as the storage tank 1 thermally insulated by high vacuum. At one first outlet 15 of the buffer 4, a second conduit part 2 "is connected. The second conduit part 2 '' is about 5 m long and thermally insulated. through of the second line part 2 ", a consumer 3 is connected to the buffer 4. The consumer 3, for example, a tumbler or a refrigerator and Be frost system. The amount of cryogenic liquid required by the consumer 3 can be about 5 to 10 liters per minute. It can be done in intervals of about 5 minutes Duration and 5 minutes break are fed. For controlled feeding of Cryogenic liquid to the consumer 3 is a fourth solenoid valve 14 in the second Conduction part 2 '' arranged. At its end facing the consumer 3 has the second conduit part 2 '' on a second branch 18, in which a fifth solenoid valve 13 is arranged.

Die dem Verbraucher 3 zugeführte kryogene Flüssigkeit wird über den zweiten Leitungsteil 2'' dem Zwischenspeicher 4 entnommen. Der Druck im Zwischenspeicher 4 beträgt etwa 2 bis 5 bar. Für den Fall, daß sich im zweiten Leitungsteil 2'' wegen einer zu langen Verweildauer bereits Gas gebildet hat, wird zunächst das fünfte Magnetventil 13 geöffnet und das sich im zweiten Leitungsteil 2'' befindliche Gas über die zweite Abzweigung 18 ins Freie geleitet. Nachdem das Gas aus dem zweiten Leitungsteil 2'' entfernt und der zweite Leitungsteil 2'' wieder vollständig mit kryogener Flüssigkeit gefüllt ist, wird das fünfte Magnetventil 13 geschlossen und das vierte Magnetventil geöffnet, so daß dem Verbraucher 3 von Anfang an kryogene Flüssigkeit zugeführt werden kann.The consumer 3 supplied cryogenic liquid is via the second line part 2 '' taken from the buffer 4. The pressure in the buffer 4 is about 2 to 5 bar. In the event that in the second line part 2 '' because of a For a long residence time has already formed gas, first is the fifth solenoid valve 13 open and the gas in the second line part 2 '' located the second branch 18 passed into the open. After the gas from the second Line part 2 '' removed and the second line part 2 '' again completely with cryogenic Liquid is filled, the fifth solenoid valve 13 is closed and the fourth Solenoid valve open, so that the consumer 3 from the beginning cryogenic liquid can be supplied.

Wenn der Zwischenspeicher 4 nahezu leer ist, wird das Haupt-Magnetventil 10 geöffnet. Da sich im ersten Leitungsteil 2' wegen der langen Verweilzeit Gas gebildet hat, wird zunächst das zweite Magnetventil 8 geöffnet und das erste Magnetventil 7 sowie das dritte Magnetventil 9 geschlossen. Hierdurch wird erreicht, daß das sich in dem ersten Leitungsteil 2' befindliche Gas während einer ersten Füllphase über die erste Abzweigung 5 ins Freie strömt. Durch die vom Vorratstank 1 in den ersten Leitungsteil 2' geleitete kryogene Flüssigkeit kühlt sich der erste Leitungsteil 2' sehr schnell ab, so daß die Flüssigkeit nach sehr kurzer Zeit nicht mehr in den gasförmigen Zustand übergeht. Wird mittels des Temperatursensors 6 festgestellt, daß sich an dem Zwischenspeicher 4 zugewandten Ende im ersten Leitungsteil 2' kryogene Flüssigkeit befindet, wird das zweite Magnetventil 8 geschlossen und das erste Magnetventil 7 geöffnet. Hierdurch gelangt über den Einlaß 17 des Zwischenspeichers 4 kryogene Flüssigkeit in den Zwischenspeicher 4.When the buffer 4 is almost empty, the main solenoid valve 10 is opened. Since gas is formed in the first conduit part 2 'because of the long residence time has, first the second solenoid valve 8 is opened and the first solenoid valve. 7 and the third solenoid valve 9 is closed. This ensures that in the first conduit part 2 'located gas during a first filling phase on the first branch 5 flows into the open air. By the storage tank 1 in the first Conduction part 2 'conducted cryogenic liquid cools the first line part 2' very quickly, so that the liquid after a very short time no longer in the gaseous State passes. Is determined by means of the temperature sensor 6 that at the buffer 4 end facing in the first conduit part 2 'cryogenic Liquid is the second solenoid valve 8 is closed and the first solenoid valve 7 open. This passes through the inlet 17 of the buffer 4 cryogenic liquid in the buffer 4.

Da sich im Zwischenspeicher 4 im Laufe der Zeit Gas gebildet haben kann, bleibt das dritte Magnetventil 9 zunächst geöffnet, so daß das von der in den Zwischenspeicher 4 geleiteten Flüssigkeit verdrängte Gas über den zweiten Auslaß 16 und die erste Abzweigung 5 entweichen kann. Nachdem der Zwischenspeicher 4 ausreichend mit kryogener Flüssigkeit gefüllt ist, werden das erste Magnetventil 7 und das dritte Magnetventil 9 wieder geschlossen.Since gas may have formed in the buffer 4 over time, remains the third solenoid valve 9 is initially opened, so that the of the in the buffer 4 conducted liquid displaced gas via the second outlet 16 and the first branch 5 can escape. After the buffer 4 sufficient is filled with cryogenic liquid, the first solenoid valve 7 and the third solenoid valve 9 closed again.

Claims (5)

  1. Apparatus for providing a cryogenic liquid, having a supply tank (1) and a feed line (2', 2'') by means of which the cryogenic liquid is fed to a consumer (3), and means (4) for avoiding warming of the cryogenic liquid during feeding to the consumer (3), characterised in that the means (4) comprise a separately constructed intermediate store (4) which is linked via a first line section (2') of the feed line to the supply tank (1) and is linked via a second line section (2'') of the feed line to the consumer (3), whereby the length of the second line section (2'') is less than half the length of the first line section (2').
  2. Apparatus according to claim 1, characterised in that the first line section (2') has no heat insulation.
  3. Apparatus according to claim 1 or 2, characterised in that, on its end facing towards the intermediate store (4), the first line section (2') has a first branch (5) by means of which gas situated in the first line section (2') is conducted away during a first phase.
  4. Apparatus according to one of the claims 1 to 3, characterised in that a temperature sensor (6) is provided by means of which the temperature of the medium situated in the line at the end of the first line section (2') facing towards the intermediate store (4) is measurable.
  5. Apparatus according to one of the claims 1 to 4, characterised in that a first valve (7) is provided by means of which the first line section (2') may be closed at its end facing towards the intermediate store (4) during the first phase.
EP99114326A 1998-08-05 1999-07-21 Apparatus for providing cryogenic liquid Expired - Lifetime EP0978682B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19835285 1998-08-05
DE19835285A DE19835285C1 (en) 1998-08-05 1998-08-05 Cryogenic liquid supply circuit

Publications (3)

Publication Number Publication Date
EP0978682A2 EP0978682A2 (en) 2000-02-09
EP0978682A3 EP0978682A3 (en) 2004-04-28
EP0978682B1 true EP0978682B1 (en) 2005-11-30

Family

ID=7876482

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99114326A Expired - Lifetime EP0978682B1 (en) 1998-08-05 1999-07-21 Apparatus for providing cryogenic liquid

Country Status (4)

Country Link
EP (1) EP0978682B1 (en)
AT (1) ATE311570T1 (en)
DE (2) DE19835285C1 (en)
DK (1) DK0978682T3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7596957B2 (en) 2003-07-18 2009-10-06 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Device and method for handling a probe

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE699711C (en) * 1936-01-05 1940-12-20 Julius Pintsch Kom Ges Process for transferring liquefied combustible gases, such as propane, using a gas pump
DE664322C (en) * 1936-06-19 1938-08-25 Julius Pintsch Kom Ges Device for transferring liquefied flammable gases
DE673594C (en) * 1937-10-07 1939-03-24 Julius Pintsch Kom Ges Process for transferring liquefied gases
DE725581C (en) * 1938-11-24 1942-09-25 Julius Pintsch Kom Ges Process for emptying and filling consumption containers with butane or other liquid gases
BE449412A (en) * 1942-06-08
DE4012600C2 (en) * 1989-05-26 1998-05-14 Leica Ag Microtome
US5121609A (en) * 1991-05-17 1992-06-16 Minnesota Valley Engineering No loss fueling station for liquid natural gas vehicles
US5771946A (en) * 1992-12-07 1998-06-30 Chicago Bridge & Iron Technical Services Company Method and apparatus for fueling vehicles with liquefied cryogenic fuel
DE19704361C1 (en) * 1997-02-05 1998-01-02 Linde Ag Tank filling device for cryogenic fuel e.g. for vehicle
DE19704362C1 (en) * 1997-02-05 1998-01-02 Linde Ag Vehicle tank filling device for cryogenic fuel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7596957B2 (en) 2003-07-18 2009-10-06 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Device and method for handling a probe

Also Published As

Publication number Publication date
DE19835285C1 (en) 2000-01-05
EP0978682A3 (en) 2004-04-28
EP0978682A2 (en) 2000-02-09
ATE311570T1 (en) 2005-12-15
DE59912855D1 (en) 2006-01-05
DK0978682T3 (en) 2006-03-20

Similar Documents

Publication Publication Date Title
EP2459922B1 (en) Combustion-gas system, in particular for cargo vessels
DE1401117A1 (en) Transportable storage container with low-boiling liquid gas filling
DE69900496T2 (en) METHOD FOR USING A GAS CAVER
EP2035739B1 (en) Method for operating a device for filling a container with cryogenically stored fuel
DE102005019413A1 (en) Process to charge an automotive airbag cartridge with gas under defined conditions of temperature and pressure
DE102007023821A1 (en) Method for filling cryogenic hydrogen tank on vehicle has residual gas tapped off to be conditioned at lower temperature before returning to cool the tank prior to filling with fresh gas
DE1501736A1 (en) Stationary storage tank with a large capacity for storing liquefied gases
DE10142757C1 (en) Refueling device and method for refueling cryofuel-powered vehicles
DE4445183A1 (en) Refuelling aircraft with liquefied hydrogen or natural gas
WO2017148604A1 (en) Method for cooling a first cryogenic pressure vessel
DE10040679A1 (en) Device and method for pressure-controlled supply from a liquid gas tank
DE19546659C2 (en) Device for refueling a vehicle
EP0978682B1 (en) Apparatus for providing cryogenic liquid
DE102007003827B4 (en) Method for operating a liquid hydrogen storage tank
DE10142758C1 (en) Device and method for refueling vehicles powered by cryogenic fuel
DE19645488C1 (en) Delivery system for gases e.g. hydrogen, nitrogen or natural gas from liquid phase in cryogenic tank
DE102015219984A1 (en) Method of increasing the temperature of gas in a cryogenic pressure vessel
DE2252638A1 (en) BALANCING STORAGE DEVICE FOR GAS PIPES
DE1950240U (en) DEVICE FOR COOLING A ROOM.
DE19645492C1 (en) System and method for maintaining or increasing pressure in a cryogenic tank
DE102007057979A1 (en) Cryogenic hydrogen filling method for storage container i.e. cryogenic tank, of motor vehicle, involves re-cooling hydrogen using suitable cooling potential, supplying residual gas and supplying large portion of gas into tank
DE19850911C2 (en) Liquid gas cooling system for cooling a consumer to low temperature
DE102019126878A1 (en) Method for refueling a motor vehicle, motor vehicle, gas station and computer-readable storage medium
DE102017217347A1 (en) Pressure vessel system and method for supplying fuel from a pressure vessel system
DE4420621A1 (en) Overflow-proof method of filling a storage tank

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIC1 Information provided on ipc code assigned before grant

Ipc: 7F 17C 5/02 B

Ipc: 7F 17C 9/00 A

17P Request for examination filed

Effective date: 20040410

17Q First examination report despatched

Effective date: 20040528

AKX Designation fees paid

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051130

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051130

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051130

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REF Corresponds to:

Ref document number: 59912855

Country of ref document: DE

Date of ref document: 20060105

Kind code of ref document: P

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: RIEDERER HASLER & PARTNER PATENTANWAELTE AG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060228

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060228

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060313

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20060502

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20051130

ET Fr: translation filed
REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060731

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

PLAX Notice of opposition and request to file observation + time limit sent

Free format text: ORIGINAL CODE: EPIDOSNOBS2

26 Opposition filed

Opponent name: LINDE AKTIENGESELLSCHAFT

Effective date: 20060824

NLR1 Nl: opposition has been filed with the epo

Opponent name: LINDE AKTIENGESELLSCHAFT

PLBB Reply of patent proprietor to notice(s) of opposition received

Free format text: ORIGINAL CODE: EPIDOSNOBS3

PLBP Opposition withdrawn

Free format text: ORIGINAL CODE: 0009264

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20070725

Year of fee payment: 9

PLBD Termination of opposition procedure: decision despatched

Free format text: ORIGINAL CODE: EPIDOSNOPC1

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20070717

Year of fee payment: 9

Ref country code: IT

Payment date: 20070726

Year of fee payment: 9

Ref country code: BE

Payment date: 20070724

Year of fee payment: 9

PLBM Termination of opposition procedure: date of legal effect published

Free format text: ORIGINAL CODE: 0009276

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: OPPOSITION PROCEDURE CLOSED

27C Opposition proceedings terminated

Effective date: 20071223

NLR2 Nl: decision of opposition

Effective date: 20071223

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20060721

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20080724

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20051130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20080718

Year of fee payment: 10

Ref country code: AT

Payment date: 20080722

Year of fee payment: 10

REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee

Effective date: 20090201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

PLAB Opposition data, opponent's data or that of the opponent's representative modified

Free format text: ORIGINAL CODE: 0009299OPPO

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080721

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090731

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090721

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20110731

Year of fee payment: 13

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130201

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 59912855

Country of ref document: DE

Effective date: 20130201