EP3614035A1 - Natural gas recovery system and vehicle comprising said system - Google Patents

Natural gas recovery system and vehicle comprising said system Download PDF

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Publication number
EP3614035A1
EP3614035A1 EP19187952.7A EP19187952A EP3614035A1 EP 3614035 A1 EP3614035 A1 EP 3614035A1 EP 19187952 A EP19187952 A EP 19187952A EP 3614035 A1 EP3614035 A1 EP 3614035A1
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EP
European Patent Office
Prior art keywords
tank
natural gas
gaseous phase
compressor
liquefied natural
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.)
Granted
Application number
EP19187952.7A
Other languages
German (de)
French (fr)
Other versions
EP3614035B1 (en
Inventor
Salvatore Basile
Clino D'Epiro
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Iveco SpA
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Iveco SpA
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Publication date
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Publication of EP3614035A1 publication Critical patent/EP3614035A1/en
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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
    • F17C9/00—Methods or apparatus for discharging liquefied or solidified gases from vessels not under 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/013—Two or more vessels
    • F17C2205/0134—Two or more vessels characterised by the presence of fluid connection between vessels
    • 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
    • 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
    • F17C2205/0335—Check-valves or non-return 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
    • F17C2221/03—Mixtures
    • F17C2221/032—Hydrocarbons
    • F17C2221/033—Methane, e.g. natural gas, CNG, LNG, GNL, GNC, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
    • F17C2223/0146—Two-phase
    • F17C2223/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2223/0161—Liquefied gas, e.g. LPG, GPL cryogenic, e.g. LNG, GNL, PLNG
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/033—Small pressure, e.g. for liquefied gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2225/00—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel
    • F17C2225/01—Handled fluid after transfer, i.e. state of fluid after transfer from the vessel characterised by the phase
    • F17C2225/0146—Two-phase
    • F17C2225/0153—Liquefied gas, e.g. LPG, GPL
    • F17C2225/0161—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
    • F17C2227/00—Transfer of fluids, i.e. method or means for transferring the fluid; Heat exchange with the fluid
    • F17C2227/01—Propulsion of the fluid
    • F17C2227/0128—Propulsion of the fluid with pumps or compressors
    • F17C2227/0157—Compressors
    • 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
    • F17C2250/01—Intermediate tanks
    • 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
    • F17C2250/043—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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/03—Treating the boil-off
    • F17C2265/032—Treating the boil-off by recovery
    • F17C2265/037—Treating the boil-off by recovery with pressurising
    • 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
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0184—Fuel cells

Definitions

  • the present invention relates to the field of natural gas systems for vehicles and in particular to liquefied natural gas systems.
  • a tank adapted to store LNG tends to release towards the atmosphere a certain amount of gas which depends on the pressure and temperature of the gas in the tank. In general it is estimated that after about 180h the first releases of gases to the outside occur.
  • Such gas contributes to the calculation of the emissions of a vehicle, since natural gas is a greenhouse gas similar to carbon dioxide.
  • the purpose of the present invention is to reduce the overall emissions of a vehicle fuelled with liquefied natural gas.
  • the basic idea of the present invention is to recover the natural gas released from the liquefied natural gas tank and to store it in another appropriate tank.
  • Another purpose is to reduce the overall emissions of a vehicle fuelled with liquefied natural gas thanks to an intrinsically safe system.
  • Figure 1 shows a first preferred variant of the present invention wherein a first tank 1 is of the type intended to store liquefied natural gas.
  • a first safety valve V1 places the tank 1 in communication with the environment. Generally, this valve is connected to a first opening placed in the upper part of the tank, so as to intercept only the gaseous phase.
  • a second opening H2, different from the first opening, is connected to an inlet of a compressor CP.
  • the outlet of the compressor CP is connected to a second tank 2 intended to store compressed natural gas.
  • a check valve CV is placed upstream or downstream of the compressor CP, depending on the direction of circulation of the gas aspirated from the tank 1 and introduced into the tank 2.
  • a pressure sensor P is housed in the first tank 1.
  • a CPU processing unit is connected to said pressure sensor P and when the pressure measured by it exceeds a predefined threshold, the processing unit orders the activation of the compressor which aspirates natural gas in the gaseous phase from the first tank 1 compressing it in the second tank 2.
  • said predefined threshold is appropriately below an activation threshold of the first safety valve V1.
  • Both the first tank and the second tank comprise respective openings towards the injection device of the natural gas supply system fuelling the internal vehicular combustion engine, not shown.
  • FIG. 2 shows another preferred variant of the invention in which the first and second tank are present, as in the previous example.
  • connection between the first tank is made in succession through an expansion chamber EX and the compressor CP.
  • the first tank as before, comprises a first safety valve V1 which places the tank 1 in communication with the environment.
  • the first tank comprises a second safety /overpressure valve V2 which connects the first tank with the expansion chamber EX.
  • the compressor CP has an inlet connected with the expansion chamber EX and an outlet connected with the second tank 2.
  • a check valve CV is placed between the expansion chamber EX and the compressor CP, or downstream of it, i.e. between the compressor CP and the second tank 2.
  • a pressure sensor P is housed in the expansion chamber EX.
  • a CPU processing unit is connected to said pressure sensor P and when the pressure measured by it exceeds a predefined threshold, the processing unit orders the activation of the compressor which aspirates natural gas in the gaseous phase from the expansion chamber compressing it in the second tank 2.
  • the pressure thresholds that determine both the opening of the overpressure/safety valve V2 and the activation of the compressor are appropriately below an activation threshold of the first safety valve V1.
  • the compressor CP is preferably an electro-compressor.
  • a second pressure sensor inside the second tank, so as to inhibit the activation of the electro-compressor when the pressure measured in the second tank exceeds a further predefined threshold.
  • the second tank too may be fitted with a safety valve not shown.
  • a pressure sensor is completely optional, as it is possible to estimate the excess gaseous phase in the first tank in different ways, for example on the basis of the quantity and temperature of the liquid phase present in the first tank.
  • the quantity may be determined indirectly based on the capacity of the first tank 1 based on the consumption of liquefied natural gas.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

A natural gas recovery system for a liquefied natural gas vehicular supply system, the vehicular supply system comprising a first tank (1), intended to store liquefied natural gas, a liquid phase and a gaseous phase of said natural gas coexisting in the first tank, the recovery system of natural gas comprising a second tank (2) intended to store compressed natural gas, a compressor (CP), adapted to compress in the second tank (2) an excess gaseous phase of the first tank.

Description

    Field of application of the invention
  • The present invention relates to the field of natural gas systems for vehicles and in particular to liquefied natural gas systems.
    • State of the art
  • A tank adapted to store LNG (Liquefied Natural Gas), tends to release towards the atmosphere a certain amount of gas which depends on the pressure and temperature of the gas in the tank. In general it is estimated that after about 180h the first releases of gases to the outside occur.
  • This happens mainly for safety reasons, in that, over time, the gaseous phase in the tank tends to increase, resulting in an increase in pressure. Therefore, in order to prevent the pressures from exceeding given values, the excess gaseous phase is released into the environment.
  • Such gas contributes to the calculation of the emissions of a vehicle, since natural gas is a greenhouse gas similar to carbon dioxide.
    • Summary of the invention
  • The purpose of the present invention is to reduce the overall emissions of a vehicle fuelled with liquefied natural gas. Indeed, the basic idea of the present invention is to recover the natural gas released from the liquefied natural gas tank and to store it in another appropriate tank.
  • Another purpose is to reduce the overall emissions of a vehicle fuelled with liquefied natural gas thanks to an intrinsically safe system.
  • Such purposes is reached by a system and a related method as claimed in the appended set of claims.
    • Brief description of the figures
  • Further purposes and advantages of the present invention will be clear from the detailed description below of an example of embodiment thereof (and of its variants) and the appended drawings provided merely by way of a nonlimiting example, wherein:
    • Figure 1 shows a diagram of a first variant of the present invention; and
    • Figure 2 shows a diagram of a second variant of the present invention.
    Detailed description of embodiments
  • Figure 1 shows a first preferred variant of the present invention wherein a first tank 1 is of the type intended to store liquefied natural gas.
  • Introduced into the tank 1 at very low temperature, about -120°C, over time it tends to gasify, so that a liquid phase L and a gaseous phase G are identified in the tank.
  • A first safety valve V1 places the tank 1 in communication with the environment. Generally, this valve is connected to a first opening placed in the upper part of the tank, so as to intercept only the gaseous phase.
  • A second opening H2, different from the first opening, is connected to an inlet of a compressor CP. The outlet of the compressor CP is connected to a second tank 2 intended to store compressed natural gas.
  • Consequently the safety valve V1 and the fluid line connecting the first tank 1 with the second tank 2 are independent of each other, see figures 1 and 2.
  • A check valve CV is placed upstream or downstream of the compressor CP, depending on the direction of circulation of the gas aspirated from the tank 1 and introduced into the tank 2.
  • A pressure sensor P is housed in the first tank 1.
  • A CPU processing unit is connected to said pressure sensor P and when the pressure measured by it exceeds a predefined threshold, the processing unit orders the activation of the compressor which aspirates natural gas in the gaseous phase from the first tank 1 compressing it in the second tank 2.
  • Clearly, said predefined threshold is appropriately below an activation threshold of the first safety valve V1.
  • Both the first tank and the second tank comprise respective openings towards the injection device of the natural gas supply system fuelling the internal vehicular combustion engine, not shown.
  • The English term "to the engine" indicates said operational connection between the tanks 1 and 2 and the internal combustion engine.
  • Figure 2 shows another preferred variant of the invention in which the first and second tank are present, as in the previous example.
  • The connection between the first tank is made in succession through an expansion chamber EX and the compressor CP.
  • The first tank, as before, comprises a first safety valve V1 which places the tank 1 in communication with the environment. In addition, the first tank comprises a second safety /overpressure valve V2 which connects the first tank with the expansion chamber EX.
  • The compressor CP has an inlet connected with the expansion chamber EX and an outlet connected with the second tank 2.
  • A check valve CV is placed between the expansion chamber EX and the compressor CP, or downstream of it, i.e. between the compressor CP and the second tank 2.
  • A pressure sensor P is housed in the expansion chamber EX.
  • A CPU processing unit is connected to said pressure sensor P and when the pressure measured by it exceeds a predefined threshold, the processing unit orders the activation of the compressor which aspirates natural gas in the gaseous phase from the expansion chamber compressing it in the second tank 2.
  • Clearly, the pressure thresholds that determine both the opening of the overpressure/safety valve V2 and the activation of the compressor are appropriately below an activation threshold of the first safety valve V1.
  • The compressor CP is preferably an electro-compressor.
  • For both examples, it may be advantageous to introduce a second pressure sensor inside the second tank, so as to inhibit the activation of the electro-compressor when the pressure measured in the second tank exceeds a further predefined threshold.
  • This avoids having to activate the compressor unnecessarily, which if electric would consume electricity without any real benefit to the system or which could lead to excessive pressure in the second tank.
  • The second tank too, for safety reasons, may be fitted with a safety valve not shown.
  • It is worth pointing out that the implementation of a pressure sensor is completely optional, as it is possible to estimate the excess gaseous phase in the first tank in different ways, for example on the basis of the quantity and temperature of the liquid phase present in the first tank.
  • The quantity may be determined indirectly based on the capacity of the first tank 1 based on the consumption of liquefied natural gas.
  • Other rough estimates may be made by knowing the time elapsed since refuelling, the environmental temperature, the capacity of the tank 1 and the amount of liquefied natural gas consumed.
  • It is clear that modifications can be made to the described system and method, which do not extend beyond the scope of protection defined by the appended claims.

Claims (14)

  1. A natural gas recovery system for a liquefied natural gas supply system configured to be mounted on a vehicle, such supply system comprising a first tank (1), configured to store liquefied natural gas, a liquid phase and a gaseous phase of said natural gas coexisting in the first tank,
    the recovery system of natural gas comprising a second tank (2) intended to store compressed natural gas, a compressor (CP), adapted to compress in said second tank (2) an excess of gaseous phase of said first tank,
    wherein said compressor has an inlet operatively connected with said first tank (1) and an outlet operatively connected with said second tank (2) and wherein the system further comprises connection means suitable to connect said first and second tanks to an engine of the vehicle,
    said first tank (1) further comprises a first safety valve (VI) adapted to place in communication said first tank (1) with the environment, when a pressure inside said first tank (1) exceeds a first predefined pressure threshold and wherein said first safety valve is connected to said first tank independently of an interconnection between said first and second tank.
  2. The system according to claim 1, further comprising an expansion chamber (EX) operatively connected with said first tank (1) and wherein said compressor has an inlet operatively connected with said expansion chamber (EX) and an outlet operatively connected with said second tank (2).
  3. The system according to claim 1 or 2, further comprising estimation means (P, CPU) of said excess gaseous phase and processing means configured to activate said compressor (CP) coherently with said excess of gaseous phase estimation.
  4. The system according to claim 3, wherein said estimation means of said excess gaseous phase comprise a pressure sensor (P), and wherein said pressure sensor (P) is installed in said first tank (1) or, if said expansion chamber (EX) is provided, in said expansion chamber (EX).
  5. The system according to claim any of claims 2 to 4, wherein said expansion chamber (EX) is operatively connected to said first tank (1) by means of a second safety valve (V2).
  6. The system of claim 5, wherein said second safety valve (V2) is calibrated at an opening pressure value lower than said first predefined pressure threshold of said first over-pressure valve (VI)
  7. The system according to any of the preceding claims, wherein said processing means (CPU) are configured to activate said compressor (CP) when a pressure measured by said pressure sensor (P) exceeds a second predefined pressure threshold lower than said first predefined pressure threshold.
  8. The system according to any one of the previous claims, further comprising a check valve arranged between said compressor (CP) and said second tank.
  9. A liquefied natural gas vehicular supply system comprising a first tank (1) intended to store liquefied natural gas, a liquid phase and a gaseous phase of said natural gas coexisting in the first tank, and comprising a recovery system of natural gas according to any one of the previous claims.
  10. The system according to claim 9, comprising means for withdrawing liquefied natural gas from said first tank (1) and compressed natural gas from said second tank (2).
  11. A land vehicle equipped with an internal combustion engine and with a liquefied natural gas supply system supplying the internal combustion engine, wherein said liquefied natural gas supply system comprises a natural gas recovery system according to one of claims 8 or 9.
  12. A method of recovery of natural gas from a liquefied natural gas supply system on a vehicle, the method comprising providing a natural gas recovery system according to any of claims 1 to 8 , such method comprising a step of recovering an excess gaseous phase of said first tank (1) and compressing it in a second tank (2).
  13. The method according to claim 12, wherein said step is performed progressively as said excess gaseous phase forms.
  14. The method according to one of claims 12 or 13, further comprising a step of adopting said liquefied natural gas and said compressed natural gas to supply an internal combustion engine.
EP19187952.7A 2014-11-11 2015-11-11 Natural gas recovery system and vehicle comprising said system Active EP3614035B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITTO20140937 2014-11-11
EP15194172.1A EP3026323B1 (en) 2014-11-11 2015-11-11 Natural gas recovery system and vehicle comprising said system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP15194172.1A Division EP3026323B1 (en) 2014-11-11 2015-11-11 Natural gas recovery system and vehicle comprising said system

Publications (2)

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EP3614035A1 true EP3614035A1 (en) 2020-02-26
EP3614035B1 EP3614035B1 (en) 2022-12-28

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EP19187952.7A Active EP3614035B1 (en) 2014-11-11 2015-11-11 Natural gas recovery system and vehicle comprising said system

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ES (2) ES2939463T3 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3054286B1 (en) * 2016-07-21 2019-05-17 Engie MODULE AND SYSTEM FOR DEPRESSURIZING A CRYOGENIC RESERVOIR

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5540208A (en) * 1994-09-13 1996-07-30 Nabco Limited Liquefied gas fuel supply system
EP1838991A1 (en) * 2005-01-21 2007-10-03 Cryostar SAS Natural gas supply method and apparatus
DE202013101593U1 (en) * 2013-04-15 2013-04-24 EES-Autogas Technologiezentrum UG (haftungsbeschränkt) Device for gas supply
WO2014006265A1 (en) * 2012-07-03 2014-01-09 Lngtainer Ab Tank
DE102012024717A1 (en) * 2012-12-18 2014-06-18 Daimler Ag Vehicle has liquefied petroleum gas tank for accommodating liquefied petroleum gas as fuel for internal combustion engine of vehicle and overpressure discharge line for discharging vaporized gas, which is connected with gas tank

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5540208A (en) * 1994-09-13 1996-07-30 Nabco Limited Liquefied gas fuel supply system
EP1838991A1 (en) * 2005-01-21 2007-10-03 Cryostar SAS Natural gas supply method and apparatus
WO2014006265A1 (en) * 2012-07-03 2014-01-09 Lngtainer Ab Tank
DE102012024717A1 (en) * 2012-12-18 2014-06-18 Daimler Ag Vehicle has liquefied petroleum gas tank for accommodating liquefied petroleum gas as fuel for internal combustion engine of vehicle and overpressure discharge line for discharging vaporized gas, which is connected with gas tank
DE202013101593U1 (en) * 2013-04-15 2013-04-24 EES-Autogas Technologiezentrum UG (haftungsbeschränkt) Device for gas supply

Also Published As

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EP3026323B1 (en) 2019-08-14
EP3614035B1 (en) 2022-12-28
ES2939463T3 (en) 2023-04-24
ES2754232T3 (en) 2020-04-16
EP3026323A1 (en) 2016-06-01

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