EP1101999A1 - Installation for storing pressurized liquefied gas and security device therewith - Google Patents

Installation for storing pressurized liquefied gas and security device therewith Download PDF

Info

Publication number
EP1101999A1
EP1101999A1 EP00403119A EP00403119A EP1101999A1 EP 1101999 A1 EP1101999 A1 EP 1101999A1 EP 00403119 A EP00403119 A EP 00403119A EP 00403119 A EP00403119 A EP 00403119A EP 1101999 A1 EP1101999 A1 EP 1101999A1
Authority
EP
European Patent Office
Prior art keywords
enclosure
pressure
temperature
wall
liquefied gas
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Withdrawn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
EP00403119A
Other languages
German (de)
French (fr)
Inventor
Lucien Varrassi
Patrick Fontanille
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.)
Cryolor SA
Original Assignee
Cryolor SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cryolor SA filed Critical Cryolor SA
Publication of EP1101999A1 publication Critical patent/EP1101999A1/en
Withdrawn legal-status Critical Current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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/021—Special adaptations of indicating, measuring, or monitoring equipment having the height as the 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
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • 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
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/06—Materials for walls or layers thereof; Properties or structures of walls or their materials
    • F17C2203/0634—Materials for walls or layers thereof
    • F17C2203/0636—Metals
    • F17C2203/0639—Steels
    • F17C2203/0643—Stainless steels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • 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
    • F17C2205/0332—Safety valves or pressure relief 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
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/011—Oxygen
    • 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
    • F17C2221/01—Pure fluids
    • F17C2221/014—Nitrogen
    • 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
    • F17C2221/01—Pure fluids
    • F17C2221/016—Noble gases (Ar, Kr, Xe)
    • 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
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • 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
    • F17C2250/0417—Level of content in the vessel with electrical means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • 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
    • 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
    • F17C2270/05—Applications for industrial use

Definitions

  • the subject of the present invention is a storage installation of a liquefied gas under pressure in a pressure enclosure and a process for storing a liquefied gas under pressure in such a pregnant.
  • FIG. 1 there is shown such an installation of known type which is constituted by the cryogenic resistance enclosure at the pressure 12 in which the liquefied gas 14 is stored.
  • the installation also includes a withdrawal tube 16 at the bottom of the tank and a safety valve 18 connected to the upper part of enclosure 12.
  • the installation is also equipped with a system 20 for detecting the level of liquid 22 in the tank.
  • This system 20 provides the percentage of the height of the enclosure occupied by the liquid and it is based on a differential measurement of pressure. This measurement controls the filling of the enclosure as soon as this percentage drops below 30%.
  • a first object of the invention is to provide an installation for storage of a liquefied gas under pressure which makes it possible to lower the cost especially with regard to the amount of metal used for the realization of the pressure enclosure while of course maintaining security conditions strictly equivalent to those provided by standards.
  • the invention is based on the one hand on the fact that the inventors have demonstrated that as long as the amount of liquid of liquefied gas contained in the tank is at least equal to 10%, the temperature of the enclosure wall remains much lower than the temperature ambient generally taken as a calculation parameter and that, more precisely, this temperature remains below at least - 50 ° C and more precisely at -80 ° C.
  • the determination calculations, especially the thickness of the wall of the pressure vessel are made from this temperature, which leads to thicknesses very significantly reduced and therefore a decrease in the quantity of steel use.
  • the installation is planned in such a way that if the actual temperature of the enclosure wall exceeds the temperature taken into account in the calculations, the valve is automatically controlled to drop the pressure inside the enclosure at a pressure substantially lower than that which was taken in account for the calculation of the wall thickness, whereby this increase in temperature is offset by decrease in pressure as to the stresses to which the wall of the enclosure is subject.
  • the quantity G is the temperature itself inside the pressure vessel.
  • the quantity used is the percentage of the height of liquid contained in the pressure resistance enclosure, height which is directly like have established the inventors in relation to the external temperature of the wall of the enclosure.
  • This variant of implementation has the advantage to use a liquid level detector in the resistance chamber the pressure that already exists in most installations.
  • Another object of the invention is to provide a method of storage of liquefied gas under pressure in an enclosure.
  • the liquid filling rate is between 30 and 100% since, in normal operation, the enclosure is filled as soon as the liquid filling rate is less than 30%. With this rate of filling, the enclosure wall remains at a temperature which does not never rises above -130 ° C. The inventors also observed that even if the filling rate becomes 10%, the temperature of the enclosure wall never rises above -80 ° C.
  • the invention proposes to calculate the dimensioning of the wall of the pressurized storage enclosure for a temperature of - 80 ° C or at least for a temperature much lower than ambient temperature, for example - 50 ° C, and for standard operating pressure P s .
  • the calculations carried out under these temperature and pressure conditions make it possible to reduce the thickness of the wall of the enclosure by 30 to 40% less than that obtained conventionally by using ambient temperature to carry out these calculations.
  • the installation is equipped with detection means directly representing the temperature of the wall or preferably a quantity correlated to this temperature and a pressure limiter at a pressure P 1 lower than the operating pressure to cause the pressure inside the enclosure to drop if the design temperature is exceeded.
  • This installation comprises the tank 30, the thickness of the wall 32 of which has been calculated according to the standard in force for a service pressure P s and for a service temperature T s equal to - 80 ° C.
  • the installation also includes the control system 20 for the liquid level 22 inside this tank.
  • the pipe 34 which puts the safety valve 18 in communication with the interior of the enclosure 30 is also connected by the pipe 36 to a controlled valve 38.
  • This controlled valve is interposed between the pipe 36 and a pressure limiter 40 whose the setting pressure is equal to P 1 , P 1 being substantially lower than the operating pressure P s for which the enclosure has been calculated.
  • the liquid height percentage information G produced by the measuring device 20 is compared with a reference percentage G 'in the comparator circuit 42.
  • G' is chosen equal to 12% and preferably equal to 10%. If the result of the comparison R is that the percentage of liquid becomes less than 10%, the valve 38 is controlled to be opened so that the interior of the tank is connected to the pressure relief valve 40 set to the pressure P 1 . On the other hand, in normal operation, as long as the percentage of liquid height G remains greater than G ', the valve 38 remains closed.
  • FIG 3 there is shown a second embodiment of the installation in which there is the tank 30 with its wall 32 whose thickness has been calculated as previously indicated as well as the safety valve 18 connected to the enclosure by the pipe 34 and the level measurement device 20.
  • at least one temperature sensor 42 is placed on the external face of the wall 32 of the enclosure, placed near the upper end of the enclosure 30 and preferably a plurality of sensors 42 disposed at this same level which therefore deliver a signal representative of the external temperature of the enclosure T e .
  • This temperature is compared in the comparator 44 with a signal representative of the temperature T s at which the calculation was carried out, that is to say corresponding to a value of - 80 ° C.
  • the result of this comparison is used to control a valve 46 which is interposed on the line 48 between the interior of the enclosure 30 and a pressure limiter 50 set to the value P 1 lower than the operating pressure P s . If the measured temperature T e becomes higher than the reference temperature T s , the valve 46 is open and the interior of the enclosure 30 is connected to the pressure limiter 50.

Abstract

The gas storage tank (30) is pressurized to contain the liquefied gas. The container has a wall thickness calculated using parameters of pressure and temperature. The circuit has sensors (20) to define the value (G) of the effective temperature of the container wall, and a memory for the value of the calculated temperature. The two values are compared (42) and valves (38,40) reduce the pressure to a value inferior to the calculated pressure resulting from a comparison of the calculated and sensed temperatures. Claims include a method of storing the gas

Description

La présente invention a pour objet une installation de stockage d'un gaz liquéfié sous pression dans une enceinte de pression et un procédé de stockage d'un gaz liquéfié sous pression dans une telle enceinte.The subject of the present invention is a storage installation of a liquefied gas under pressure in a pressure enclosure and a process for storing a liquefied gas under pressure in such a pregnant.

Les gaz industriels tels que l'oxygène, l'azote, l'argon qui sont très largement utilisés dans tous les secteurs de l'industrie sont distribués en grande partie sous forme liquide à basse température et sont stockés chez l'utilisateur dans une enceinte cryogénique appelée le plus souvent "évaporateur" dont la pression de conception est généralement comprise entre 10 et 20 bar. Le coût des évaporateurs intervient de façon très significative dans le prix de revient des gaz industriels pour l'utilisateur. Or, il s'avère que près de la moitié de ce coût provient du métal, le plus souvent de l'acier inoxydable austénitique, dont est constitué le récipient à pression contenant le liquide cryogénique. Il y a donc un réel intérêt à pouvoir construire des enceintes ou évaporateurs dont le coût serait réduit par rapport au coût actuel.Industrial gases such as oxygen, nitrogen, argon which are widely used in all industry sectors are distributed largely in liquid form at low temperatures and are stored in the user in a cryogenic enclosure most often called "evaporator" whose design pressure is generally understood between 10 and 20 bar. The cost of the evaporators comes into play very significant in the cost price of industrial gases for the user. Gold, it turns out that almost half of this cost comes from metal, the most often austenitic stainless steel, which is the container for pressure containing cryogenic liquid. So there is a real interest in ability to construct lower cost enclosures or evaporators compared to the current cost.

En outre, on comprend que, pour des raisons de sécurité évidentes, le calcul des dimensions de l'enceinte ou de la cuve doit être réalisé de façon très rigoureuse selon la norme EN 10 028-7 annexe F.Furthermore, it is understood that, for security reasons obvious, the calculation of the dimensions of the enclosure or the tank must be carried out very rigorously according to standard EN 10 028-7 annex F.

Sur la figure 1 annexée, on a représenté une telle installation de type connu qui est constituée par l'enceinte cryogénique de résistance à la pression 12 dans laquelle le gaz liquéfié 14 est stocké. L'installation comprend également une tubulure de soutirage 16 à la partie inférieure de la cuve ainsi qu'une soupape de sécurité 18 reliée à la partie supérieure de l'enceinte 12. Le plus souvent, l'installation est également équipée d'un système 20 de détection du niveau de liquide 22 dans la cuve. Ce système 20 permet de fournir le pourcentage de la hauteur de l'enceinte occupée par le liquide et il est basé sur une mesure différentielle de pression. Cette mesure permet de commander le remplissage de l'enceinte dès que ce pourcentage devient inférieur à 30%.In Figure 1 attached, there is shown such an installation of known type which is constituted by the cryogenic resistance enclosure at the pressure 12 in which the liquefied gas 14 is stored. The installation also includes a withdrawal tube 16 at the bottom of the tank and a safety valve 18 connected to the upper part of enclosure 12. Most often, the installation is also equipped with a system 20 for detecting the level of liquid 22 in the tank. This system 20 provides the percentage of the height of the enclosure occupied by the liquid and it is based on a differential measurement of pressure. This measurement controls the filling of the enclosure as soon as this percentage drops below 30%.

Dans les calculs visant à déterminer les caractéristiques dimensionnelles de l'enceinte cryogénique qui utilisent la norme déjà mentionnée, on prend en considération une température égale à la température ambiante ainsi qu'une pression de service qui correspond à la pression d'ouverture de la soupape de sécurité 18. In calculations to determine dimensional characteristics of the cryogenic enclosure that use the standard already mentioned, we take into consideration a temperature equal to the ambient temperature as well as a working pressure which corresponds to the opening pressure of the safety valve 18.

Un premier objet de l'invention est de fournir une installation de stockage d'un gaz liquéfié sous pression qui permette d'en abaisser le coût notamment en ce qui concerne la quantité de métal utilisé pour la réalisation de l'enceinte de pression tout en maintenant bien sûr des conditions de sécurité strictement équivalentes à celles qui sont prévues par les normes.A first object of the invention is to provide an installation for storage of a liquefied gas under pressure which makes it possible to lower the cost especially with regard to the amount of metal used for the realization of the pressure enclosure while of course maintaining security conditions strictly equivalent to those provided by standards.

Pour atteindre ce but selon l'invention, l'installation de stockage d'un gaz liquéfié sous pression dans une enceinte de pression comprenant :

  • une enceinte fermée de résistance à la pression pour contenir ledit liquide, ladite enceinte comportant une paroi dont l'épaisseur est déterminée par des calculs prenant en considération des paramètres liés à une pression Ps à l'intérieur de ladite enceinte et à une température Ts < - 50°C de paroi,
  • des moyens pour élaborer une grandeur G représentative de la température effective Te de la paroi de l'enceinte, des moyens pour élaborer une grandeur G' de même nature que G et représentative de la température de calcul Ts,
  • des moyens pour comparer les grandeurs G et G',
  • et des moyens pour abaisser la pression à une valeur P2 inférieure à la pression de calcul Ps si il résulte de la comparaison que Te est supérieure à Ts.
To achieve this object according to the invention, the installation for storing a liquefied gas under pressure in a pressure enclosure comprising:
  • a closed pressure resistance enclosure to contain said liquid, said enclosure comprising a wall whose thickness is determined by calculations taking into account parameters related to a pressure P s inside said enclosure and at a temperature T s <- 50 ° C wall,
  • means for developing a quantity G representative of the effective temperature T e of the wall of the enclosure, means for developing a quantity G 'of the same nature as G and representative of the calculation temperature T s ,
  • means for comparing the magnitudes G and G ',
  • and means for lowering the pressure to a value P 2 lower than the design pressure P s if it results from the comparison that T e is greater than T s .

On comprend que l'invention est basée d'une part sur le fait que les inventeurs ont mis en évidence que tant que la quantité de liquide de gaz liquéfié contenu dans la cuve est au moins égale à 10 %, la température de la paroi de l'enceinte reste très inférieure à la température ambiante prise en général comme paramètre de calcul et que, plus précisément, cette température reste inférieure à au moins - 50°C et plus précisément à -80°C. En conséquence, les calculs de détermination, notamment de l'épaisseur de la paroi de l'enceinte de pression, sont faits à partir de cette température, ce qui permet d'aboutir à des épaisseurs très sensiblement réduites et donc à une diminution de la quantité d'acier à utiliser. En contrepartie, l'installation est prévue de telle manière que si la température effective de la paroi de l'enceinte vient à excéder la température prise en compte dans les calculs, la soupape est automatiquement commandée pour faire chuter la pression à l'intérieur de l'enceinte à une pression sensiblement inférieure à celle qui a été prise en compte pour le calcul de l'épaisseur de la paroi, par quoi cette augmentation de température est compensée par la diminution de pression quant aux contraintes auxquelles la paroi de l'enceinte est soumise.We understand that the invention is based on the one hand on the fact that the inventors have demonstrated that as long as the amount of liquid of liquefied gas contained in the tank is at least equal to 10%, the temperature of the enclosure wall remains much lower than the temperature ambient generally taken as a calculation parameter and that, more precisely, this temperature remains below at least - 50 ° C and more precisely at -80 ° C. As a result, the determination calculations, especially the thickness of the wall of the pressure vessel, are made from this temperature, which leads to thicknesses very significantly reduced and therefore a decrease in the quantity of steel use. In return, the installation is planned in such a way that if the actual temperature of the enclosure wall exceeds the temperature taken into account in the calculations, the valve is automatically controlled to drop the pressure inside the enclosure at a pressure substantially lower than that which was taken in account for the calculation of the wall thickness, whereby this increase in temperature is offset by decrease in pressure as to the stresses to which the wall of the enclosure is subject.

Selon un premier mode de mise en oeuvre, la grandeur G est la température elle-même dans l'enceinte du récipient de pression.According to a first embodiment, the quantity G is the temperature itself inside the pressure vessel.

Selon un deuxième mode de mise en oeuvre, la grandeur utilisée est le pourcentage de la hauteur de liquide contenu dans l'enceinte de résistance à la pression, hauteur qui est directement comme l'ont établi les inventeurs en relation avec la température externe de la paroi de l'enceinte. Cette variante de mise en oeuvre présente l'avantage d'utiliser un détecteur du niveau de liquide dans l'enceinte de résistance à la pression qui existe déjà dans la majorité des installations.According to a second embodiment, the quantity used is the percentage of the height of liquid contained in the pressure resistance enclosure, height which is directly like have established the inventors in relation to the external temperature of the wall of the enclosure. This variant of implementation has the advantage to use a liquid level detector in the resistance chamber the pressure that already exists in most installations.

Un autre objet de l'invention est de fournir un procédé de stockage de gaz liquéfié sous pression dans une enceinte.Another object of the invention is to provide a method of storage of liquefied gas under pressure in an enclosure.

Ce procédé se caractérise en ce qu'il comprend les étapes suivantes :

  • on calcule l'épaisseur de la paroi de ladite enceinte en utilisant des paramètres correspondant à une pression Ps à l'intérieur de l'enceinte et à une température Ts (Ts < - 50°C) de ladite enceinte, par quoi on obtient une épaisseur es,
  • on fournit une enceinte de résistance à la pression dont l'épaisseur est égale à es,
  • on remplit ladite enceinte avec ledit gaz liquéfié,
  • on mesure une grandeur G représentative de température Te effective de la paroi de ladite enceinte au fur et à mesure de l'extraction dudit gaz interne dans l'enceinte,
  • on compare ladite grandeur mesurée G à une grandeur de référence (G') de même nature que la grandeur mesurée G, représentative de ladite température Ts,
  • on abaisse la pression dans l'enceinte si la température Te devient supérieure à la température Ts.
This process is characterized in that it comprises the following stages:
  • the thickness of the wall of said enclosure is calculated using parameters corresponding to a pressure P s inside the enclosure and to a temperature T s (T s <- 50 ° C) of said enclosure, whereby we obtain a thickness e s ,
  • a pressure resistance enclosure is provided, the thickness of which is equal to e s ,
  • filling said enclosure with said liquefied gas,
  • a quantity G representative of the effective temperature T e of the wall of said enclosure is measured as and when said internal gas is extracted in the enclosure,
  • comparing said measured quantity G with a reference quantity (G ′) of the same nature as the measured quantity G, representative of said temperature T s ,
  • the pressure in the enclosure is lowered if the temperature T e becomes higher than the temperature T s .

D'autres caractéristiques et avantages de l'invention apparaítront mieux à la lecture de la description qui suit de plusieurs modes de réalisation de l'invention donnés à titre d'exemples non limitatifs. La description qui se réfère aux figures annexées, sur lesquelles :

  • la figure 1 déjà décrite montre une installation de stockage de gaz liquéfié connue ;
  • la figure 2 montre un premier mode de réalisation de l'enceinte de l'installation de stockage selon l'invention ; et
  • la figure 3 montre un deuxième mode de réalisation de l'installation de stockage conforme à l'invention.
    • Other characteristics and advantages of the invention will appear better on reading the following description of several embodiments of the invention given by way of non-limiting examples. The description which refers to the appended figures, in which:
  • Figure 1 already described shows a known liquefied gas storage installation;
  • Figure 2 shows a first embodiment of the enclosure of the storage installation according to the invention; and
  • Figure 3 shows a second embodiment of the storage installation according to the invention.

    • Comme on l'a déjà indiqué succinctement, la présente invention est basée sur les constatations suivantes faites par les inventeurs. Dans les conditions normales d'utilisation de ces installations, le taux de remplissage en liquide se trouve entre 30 et 100 % puisque, en fonctionnement normal, l'enceinte fait l'objet d'un remplissage dès que le taux de remplissage en liquide se trouve inférieur à 30 %. Avec ce taux de remplissage, la paroi de l'enceinte reste à une température qui ne remonte jamais au-dessus de -130°C. Les inventeurs ont également observé que, même si le taux de remplissage devient égal à 10 %, la température de la paroi de l'enceinte ne remonte jamais au-dessus de-80°C.As already stated briefly, this invention is based on the following findings by inventors. Under normal conditions of use of these installations, the liquid filling rate is between 30 and 100% since, in normal operation, the enclosure is filled as soon as the liquid filling rate is less than 30%. With this rate of filling, the enclosure wall remains at a temperature which does not never rises above -130 ° C. The inventors also observed that even if the filling rate becomes 10%, the temperature of the enclosure wall never rises above -80 ° C.

    Au vu de ces observations, l'invention propose de calculer le dimensionnement de la paroi de l'enceinte de stockage sous pression pour une température de - 80°C ou du moins pour une température bien inférieure à la température ambiante, par exemple - 50°C, et pour la pression de service Ps standard. Les calculs effectués dans ces conditions de température et de pression permettent de diminuer l'épaisseur de la paroi de l'enceinte de 30 à 40 % inférieure à celle qu'on obtient de façon classique en utilisant la température ambiante pour effectuer ces calculs.In view of these observations, the invention proposes to calculate the dimensioning of the wall of the pressurized storage enclosure for a temperature of - 80 ° C or at least for a temperature much lower than ambient temperature, for example - 50 ° C, and for standard operating pressure P s . The calculations carried out under these temperature and pressure conditions make it possible to reduce the thickness of the wall of the enclosure by 30 to 40% less than that obtained conventionally by using ambient temperature to carry out these calculations.

    Afin de maintenir le même degré de sécurité de l'installation même dans le cas où, pour des raisons tout à fait exceptionnelles et accidentelles, la température de la paroi de l'enceinte deviendrait à descendre en dessous de la température prise en considération pour les calculs, c'est-à-dire si le taux de remplissage devenait inférieur à 10 %, l'installation est équipée de moyens de détection représentant directement la température de la paroi ou de préférence une grandeur corrélée à cette température et un limiteur de pression à une pression P1 inférieure à la pression de service pour provoquer la chute de la pression à l'intérieur de l'enceinte en cas de dépassement de la température de calcul.In order to maintain the same degree of safety of the installation even in the case where, for quite exceptional and accidental reasons, the temperature of the wall of the enclosure becomes lower than the temperature taken into account for the calculations, that is to say if the filling rate becomes less than 10%, the installation is equipped with detection means directly representing the temperature of the wall or preferably a quantity correlated to this temperature and a pressure limiter at a pressure P 1 lower than the operating pressure to cause the pressure inside the enclosure to drop if the design temperature is exceeded.

    En se référant tout d'abord à la figure 2, on va décrire un premier mode de réalisation de l'installation de stockage de gaz liquéfié. Cette installation comporte la cuve 30 dont l'épaisseur de la paroi 32 a été calculée selon la norme en vigueur pour une pression Ps de service et pour une température de service Ts égale à - 80°C. L'installation comporte également le système de contrôle 20 du niveau de liquide 22 à l'intérieur de cette cuve. La conduite 34 qui met en communication la soupape de sécurité 18 avec l'intérieur de l'enceinte 30 est également reliée par la conduite 36 à une vanne commandée 38. Cette vanne commandée est interposée entre la conduite 36 et un limiteur de pression 40 dont la pression de réglage est égale à P1, P1 étant sensiblement inférieure à la pression de service Ps pour laquelle l'enceinte a été calculée. L'information de pourcentage de hauteur de liquide G élaborée par le dispositif de mesure 20 est comparée à un pourcentage de référence G' dans le circuit comparateur 42. G' est choisi égal à 12 % et de préférence égal à 10 %. Si le résultat de la comparaison R est que le pourcentage de liquide devient inférieur à 10 %, la vanne 38 est commandée pour être ouverte de telle manière que l'intérieur de la cuve soit relié au limiteur de pression 40 réglé sur la pression P1. En revanche, en fonctionnement normal, tant que le pourcentage de hauteur de liquide G reste supérieur à G', la vanne 38 reste fermée.Referring first to Figure 2, we will describe a first embodiment of the liquefied gas storage installation. This installation comprises the tank 30, the thickness of the wall 32 of which has been calculated according to the standard in force for a service pressure P s and for a service temperature T s equal to - 80 ° C. The installation also includes the control system 20 for the liquid level 22 inside this tank. The pipe 34 which puts the safety valve 18 in communication with the interior of the enclosure 30 is also connected by the pipe 36 to a controlled valve 38. This controlled valve is interposed between the pipe 36 and a pressure limiter 40 whose the setting pressure is equal to P 1 , P 1 being substantially lower than the operating pressure P s for which the enclosure has been calculated. The liquid height percentage information G produced by the measuring device 20 is compared with a reference percentage G 'in the comparator circuit 42. G' is chosen equal to 12% and preferably equal to 10%. If the result of the comparison R is that the percentage of liquid becomes less than 10%, the valve 38 is controlled to be opened so that the interior of the tank is connected to the pressure relief valve 40 set to the pressure P 1 . On the other hand, in normal operation, as long as the percentage of liquid height G remains greater than G ', the valve 38 remains closed.

    Cette solution est particulièrement intéressante puisqu'elle ne nécessite pas d'autre capteur que le dispositif de mesure du niveau de liquide.This solution is particularly interesting since it does not requires no sensor other than the level measurement device liquid.

    Sur la figure 3, on a représenté un deuxième mode de réalisation de l'installation dans laquelle on retrouve la cuve 30 avec sa paroi 32 dont l'épaisseur a été calculée comme on l'a indiqué précédemment ainsi que la soupape de sécurité 18 reliée à l'enceinte par la conduite 34 et le dispositif de mesure de niveau 20. Dans ce mode de réalisation, on place sur la face externe de la paroi 32 de l'enceinte au moins un capteur de température 42 disposé à proximité de l'extrémité supérieure de l'enceinte 30 et de préférence une pluralité de capteurs 42 disposés à ce même niveau qui délivrent donc un signal représentatif de la température externe de l'enceinte Te. Cette température est comparée dans le comparateur 44 à un signal représentatif de la température Ts à laquelle le calcul a été effectué, c'est-à-dire correspondant à une valeur de - 80°C. Le résultat de cette comparaison sert à commander une vanne 46 qui est interposée sur la conduite 48 entre l'intérieur de l'enceinte 30 et un limiteur de pression 50 réglé à la valeur P1 inférieure à la pression de service Ps. Si la température mesurée Te devient supérieure à la température de référence Ts, la vanne 46 est ouverte et l'intérieur de l'enceinte 30 est reliée au limiteur de pression 50.In Figure 3, there is shown a second embodiment of the installation in which there is the tank 30 with its wall 32 whose thickness has been calculated as previously indicated as well as the safety valve 18 connected to the enclosure by the pipe 34 and the level measurement device 20. In this embodiment, at least one temperature sensor 42 is placed on the external face of the wall 32 of the enclosure, placed near the upper end of the enclosure 30 and preferably a plurality of sensors 42 disposed at this same level which therefore deliver a signal representative of the external temperature of the enclosure T e . This temperature is compared in the comparator 44 with a signal representative of the temperature T s at which the calculation was carried out, that is to say corresponding to a value of - 80 ° C. The result of this comparison is used to control a valve 46 which is interposed on the line 48 between the interior of the enclosure 30 and a pressure limiter 50 set to the value P 1 lower than the operating pressure P s . If the measured temperature T e becomes higher than the reference temperature T s , the valve 46 is open and the interior of the enclosure 30 is connected to the pressure limiter 50.

    Cette solution est plus intéressante lorsqu'il n'est pas nécessaire que l'installation de stockage comporte un dispositif de contrôle du niveau de liquide ou dans le cas où ce dispositif existe mais qu'il ne produit pas un signal, par exemple électrique, qui permettrait de commander la vanne.This solution is more interesting when it is not the storage installation must include a device for liquid level control or in case this device exists but that it does not produce a signal, for example electrical, which would allow control the valve.

    II en résulte de la description précédente que, conformément à l'invention, il est possible de réaliser une enceinte de pression cryogénique dont l'épaisseur est très sensiblement réduite du fait que l'on utilise comme température pour le calcul de cette épaisseur une température très inférieure à la température ambiante, cette température étant de - 50°C ou, de préférence, de - 80°C sans altérer la sécurité de fonctionnement de l'installation.It follows from the above description that, in accordance with the invention, it is possible to produce a pressure enclosure cryogenic whose thickness is very significantly reduced due to the fact that uses as temperature for the calculation of this thickness a temperature much lower than room temperature, this temperature being - 50 ° C or, preferably, - 80 ° C without impairing the safety of operation of the installation.

    Claims (9)

    Installation de stockage d'un gaz liquéfié sous pression dans une enceinte de pression comprenant : une enceinte fermée de résistance à la pression pour contenir ledit liquide, ladite enceinte comportant une paroi dont l'épaisseur es est déterminée par des calculs prenant en considération des paramètres liés à une pression Ps à l'intérieur de ladite enceinte et à une température Ts < - 50°C de paroi de ladite enceinte, des moyens pour élaborer une grandeur G représentative de la température effective Te de la paroi de l'enceinte, des moyens pour élaborer une grandeur G' de même nature que G et représentative de la température de calcul Ts, des moyens pour comparer les grandeurs G et G', et des moyens pour abaisser la pression à une valeur P2 inférieure à la pression de calcul Ps si il résulte de la comparaison que Te est supérieure à Ts. Installation for storing a liquefied gas under pressure in a pressure enclosure comprising: a closed pressure resistance enclosure to contain said liquid, said enclosure comprising a wall whose thickness e s is determined by calculations taking into account parameters related to a pressure P s inside said enclosure and to a wall temperature T s <- 50 ° C of said enclosure, means for developing a quantity G representative of the effective temperature T e of the wall of the enclosure, means for developing a quantity G ′ of the same nature as G and representative of the design temperature T s , means for comparing the magnitudes G and G ', and means for lowering the pressure to a value P 2 lower than the design pressure P s if it results from the comparison that T e is greater than T s . Installation selon la revendication 1, caractérisée en ce que la grandeur G est la température de l'enceinte Te elle-même et en ce que la grandeur G' est la température de calcul Ts elle-même.Installation according to claim 1, characterized in that the quantity G is the temperature of the enclosure T e itself and in that the quantity G 'is the calculation temperature T s itself. Installation selon la revendication 1, caractérisée en ce que la grandeur G est le pourcentage de la hauteur de l'enceinte occupée par un liquide, en ce que ladite grandeur G' est un pourcentage inférieur à 30 % et en ce que ladite pression interne est ramenée à P2 si G devient inférieure à G'.Installation according to claim 1, characterized in that the quantity G is the percentage of the height of the enclosure occupied by a liquid, in that the said quantity G 'is a percentage less than 30% and in that the said internal pressure is reduced to P 2 if G becomes less than G '. Installation selon la revendication 3, caractérisée en ce que ladite température Ts est égale à - 80°C et ledit pourcentage est compris entre 15 et 10 %.Installation according to claim 3, characterized in that said temperature T s is equal to - 80 ° C and said percentage is between 15 and 10%. Installation selon l'une quelconque des revendications 3 et 4, caractérisée en ce que lesdits moyens pour élaborer la grandeur G comprennent un dispositif de détermination du niveau de liquide à l'intérieur de l'enceinte.Installation according to any one of claims 3 and 4, characterized in that said means for developing the quantity G include a device for determining the level of liquid at inside the enclosure. Installation selon l'une quelconque des revendications 1 à 5, caractérisée en ce que lesdits moyens pour abaisser la pression comprennent : un dispositif limiteur de pression à ladite pression P2, une conduite pour relier la partie supérieure de ladite enceinte audit dispositif limiteur de pression, une vanne commandable montée sur ladite conduite et fermée au repos, des moyens pour commander l'ouverture de ladite vanne en réponse au résultat de ladite comparaison. Installation according to any one of Claims 1 to 5, characterized in that the said means for reducing the pressure comprise: a pressure limiting device at said pressure P 2 , a pipe for connecting the upper part of said enclosure to said pressure limiting device, a controllable valve mounted on said pipe and closed at rest, means for controlling the opening of said valve in response to the result of said comparison. Installation selon l'une quelconque des revendications 1 à 6, caractérisée en ce que ladite enceinte est réalisée en acier inoxydable austénitique.Installation according to any one of claims 1 to 6, characterized in that said enclosure is made of stainless steel austenitic. Installation selon l'une quelconque des revendications 1 à 7, caractérisée en ce que ledit gaz liquéfié est choisi dans le groupe comprenant l'azote, l'oxygène et l'argon.Installation according to any one of claims 1 to 7, characterized in that said liquefied gas is selected from the group including nitrogen, oxygen and argon. Procédé de stockage d'un gaz liquéfié sous pression dans une enceinte de résistance à la pression comportant les étapes suivantes : on calcule l'épaisseur de la paroi de ladite enceinte en utilisant des paramètres correspondant à une pression Ps à l'intérieur de l'enceinte et à une température Ts (Ts < - 50°C) de ladite enceinte, par quoi on obtient une épaisseur es, on fournit une enceinte de résistance à la pression dont l'épaisseur est égale à es, on remplit ladite enceinte avec ledit gaz liquéfié, on mesure une grandeur G représentative de température Te effective de la paroi de ladite enceinte au fur et à mesure de l'extraction dudit gaz interne dans l'enceinte, on compare ladite grandeur mesurée G à une grandeur de référence (G') de même nature que la grandeur mesurée G, représentative de ladite température Ts, on abaisse la pression dans l'enceinte à une valeur P2 inférieure à Ps si la température Te devient supérieure à la température Ts. Method for storing a liquefied gas under pressure in a pressure resistance enclosure comprising the following steps: the thickness of the wall of said enclosure is calculated using parameters corresponding to a pressure P s inside the enclosure and to a temperature T s (T s <- 50 ° C) of said enclosure, whereby we obtain a thickness e s , a pressure resistance enclosure is provided, the thickness of which is equal to e s , filling said enclosure with said liquefied gas, a quantity G representative of the effective temperature T e of the wall of said enclosure is measured as and when said internal gas is extracted in the enclosure, comparing said measured quantity G with a reference quantity (G ′) of the same nature as the measured quantity G, representative of said temperature T s , the pressure in the enclosure is lowered to a value P 2 less than P s if the temperature T e becomes greater than the temperature T s .
    EP00403119A 1999-11-22 2000-11-09 Installation for storing pressurized liquefied gas and security device therewith Withdrawn EP1101999A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9914648A FR2801370B1 (en) 1999-11-22 1999-11-22 PRESSURE LIQUEFIED GAS STORAGE SYSTEM
    FR9914648 1999-11-22

    Publications (1)

    Publication Number Publication Date
    EP1101999A1 true EP1101999A1 (en) 2001-05-23

    Family

    ID=9552368

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP00403119A Withdrawn EP1101999A1 (en) 1999-11-22 2000-11-09 Installation for storing pressurized liquefied gas and security device therewith

    Country Status (4)

    Country Link
    US (1) US6438968B1 (en)
    EP (1) EP1101999A1 (en)
    CZ (1) CZ20004312A3 (en)
    FR (1) FR2801370B1 (en)

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    JP2004029679A (en) * 2002-06-28 2004-01-29 Toshiba Corp Optical module device, method of manufacturing the same, and projection tv system
    JP4622857B2 (en) * 2003-07-25 2011-02-02 トヨタ自動車株式会社 Gas supply device

    Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3455316A (en) * 1967-09-20 1969-07-15 Thelmer A Rogers Safety valve system-structure
    US5275007A (en) * 1992-07-14 1994-01-04 Minnesota Valley Engineering, Inc. Cryogenic dewar level sensor and flushing system
    US5467603A (en) * 1993-07-08 1995-11-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude High-pressure gas supply installation
    EP0744576A2 (en) * 1995-05-25 1996-11-27 Aerojet-General Corporation System and method for regulating the temperature of cryogenic liquids
    US5628349A (en) * 1995-01-25 1997-05-13 Pinnacle Cng Systems, Llc System and method for dispensing pressurized gas

    Family Cites Families (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US5293750A (en) * 1991-11-27 1994-03-15 Osaka Gas Company Limited Control system for liquefied gas container

    Patent Citations (5)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    US3455316A (en) * 1967-09-20 1969-07-15 Thelmer A Rogers Safety valve system-structure
    US5275007A (en) * 1992-07-14 1994-01-04 Minnesota Valley Engineering, Inc. Cryogenic dewar level sensor and flushing system
    US5467603A (en) * 1993-07-08 1995-11-21 L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude High-pressure gas supply installation
    US5628349A (en) * 1995-01-25 1997-05-13 Pinnacle Cng Systems, Llc System and method for dispensing pressurized gas
    EP0744576A2 (en) * 1995-05-25 1996-11-27 Aerojet-General Corporation System and method for regulating the temperature of cryogenic liquids

    Also Published As

    Publication number Publication date
    FR2801370B1 (en) 2002-02-01
    CZ20004312A3 (en) 2001-08-15
    US6438968B1 (en) 2002-08-27
    FR2801370A1 (en) 2001-05-25

    Similar Documents

    Publication Publication Date Title
    EP1974164B1 (en) Method and device for filling pressure gas containers
    FR2533304A1 (en) REFRIGERATING APPARATUS FOR RAPID COOLING OF SPECIMENS, ESPECIALLY BIOLOGICAL
    FR2628835A1 (en)
    FR2472738A1 (en) WATER LEVEL INDICATOR FOR NUCLEAR REACTOR
    FR2922992A1 (en) METHOD FOR REAL-TIME DETERMINATION OF THE FILLING LEVEL OF A CRYOGENIC RESERVOIR
    EP3486548A1 (en) Pressure vessel with strain gauge and remote communcation means
    EP1939606B1 (en) Method for measuring the actual porosity of the watertightness barrier of a fluid containment tank
    FR2472177A1 (en) LEVEL MEASURER FOR LIQUID, ESPECIALLY FOR THE COOLING WATER OF A REACTOR
    EP0236638A1 (en) Temperature compensated pressure regulator and extinguisher safety device equipped with such a pressure regulator.
    CA2592319A1 (en) Method for controlled filling of pressurized gas tanks
    FR2849144A1 (en) CRYOGENIC VALVE DEVICE WITH PNEUMATIC ACTUATOR
    CA2491022C (en) Method for pressure regulation of a cryogenic fluid tank, and corresponding tank
    EP0869344A1 (en) Leak detector using a tracer gas
    EP2041503A1 (en) Device for dry cryopreservation of products, in particular of samples of biological material
    EP1101999A1 (en) Installation for storing pressurized liquefied gas and security device therewith
    US8042378B2 (en) Gas amount measurement device
    FR3112192A1 (en) Pressurized fluid container with electronic device incorporating a pressure and temperature sensor
    WO1994022744A1 (en) Device for inerting a storage tank
    WO2009074757A1 (en) Method for determining the mass of fluid in a cryogenic tank as well as the mass flow of the fluid used
    EP2489995B1 (en) Detector of the presence of a liquid.
    EP2597048B1 (en) Cell for measuring cork permeability
    FR3038052A1 (en) METHOD AND DEVICE FOR ESTIMATING THE MASS OF GAS CONTAINED IN A GAS TANK UNDER PRESSURE
    EP0591045B1 (en) Method and installation for filling a container with liquid air
    FR2511175A1 (en) COOLING AGENT CONTROL APPARATUS FOR NUCLEAR REACTOR
    FR3020873A1 (en) CRYOGENIC LIQUID LEVEL SENSOR AND STORAGE DEVICE HAVING SUCH A SENSOR

    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: A1

    Designated state(s): DE GB IT SE

    AX Request for extension of the european patent

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

    17P Request for examination filed

    Effective date: 20011123

    AKX Designation fees paid

    Free format text: DE GB IT SE

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

    Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

    18D Application deemed to be withdrawn

    Effective date: 20051201