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SE543923C2 - A vehicle assembly and a vehicle - Google Patents

A vehicle assembly and a vehicle

Info

Publication number
SE543923C2
SE543923C2 SE1950100A SE1950100A SE543923C2 SE 543923 C2 SE543923 C2 SE 543923C2 SE 1950100 A SE1950100 A SE 1950100A SE 1950100 A SE1950100 A SE 1950100A SE 543923 C2 SE543923 C2 SE 543923C2
Authority
SE
Sweden
Prior art keywords
pressure
vehicle
shut
gas
relief device
Prior art date
Application number
SE1950100A
Other languages
Swedish (sv)
Other versions
SE1950100A1 (en
Inventor
Andreas Forsell
Original Assignee
Scania Cv Ab
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 Scania Cv Ab filed Critical Scania Cv Ab
Priority to SE1950100A priority Critical patent/SE543923C2/en
Publication of SE1950100A1 publication Critical patent/SE1950100A1/en
Publication of SE543923C2 publication Critical patent/SE543923C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H1/2203—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3201—Cooling devices using absorption or adsorption
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
    • F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0293—Safety devices; Fail-safe 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
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
    • B60H2001/2268—Constructional features
    • B60H2001/2284—Fuel supply
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/035—Fuel tanks characterised by venting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K15/03006—Gas tanks
    • B60K2015/03013—Control systems for LPG tanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/0321—Fuel tanks characterised by special sensors, the mounting thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • B60K2015/03256—Fuel tanks characterised by special valves, the mounting thereof
    • B60K2015/03296—Pressure regulating valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
    • 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
    • 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
    • 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
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2260/00—Purposes of gas storage and gas handling
    • F17C2260/04—Reducing risks and environmental impact
    • F17C2260/046—Enhancing energy recovery
    • 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
    • F17C2265/036—Treating the boil-off by recovery with heating
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/30—Use of alternative fuels, e.g. biofuels
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Combustion & Propulsion (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

An apparatus (1, 1') is disclosed configured to heat and/or cool a compartment (3, 3’) of a vehicle (5). The vehicle (5) comprises a pressure tank (7) configured to accommodate liquified gaseous fuel, the pressure tank (7) comprising a pressure relief device (9). The apparatus (1, 1') comprises an inlet conduit (11) configured to be fluidly connected to the pressure relief device (9) of the pressure tank (7), and a burner (13, 13’) arranged to burn gas evacuated via the pressure relief device (9). The present disclosure further relates to a vehicle assembly (20) as well as a vehicle (5) comprising a vehicle assembly (20).

Description

Apparatus, Vehicle Assembly, and Vehicle TECHNICAL FIELD The present disclosure relates to an apparatus configured to heat and/or cool a compartmentof a vehicle. The present disclosure further relates to a vehicle assembly comprising apressure tank configured to accommodate liquified gaseous fuel and an apparatusconfigured to heat and/or cool a compartment of a vehicle. Moreover, the present disclosurerelates to a vehicle comprising a vehicle assembly.
BACKGROUND Some vehicles use liquified gaseous fuel for propulsion of the vehicle. One example of sucha fuel is liquefied natural gas, usually abbreviated LNG, which comprises a hydrocarbon gasmixture consisting primarily of methane. Natural gas can be fossil fuel-based, i.e. a non-renewable resource. As an alternative, natural gas can be produced by the breakdown oforganic matter such as agricultural waste, manure, municipal waste, sewage, plant material,green waste, food waste, or similar. Such natural gas is usually referred to as biogas and is arenewable energy source which consists primarily of methane.
A drawback with gaseous fuel is that it requires a lot of space when in gaseous state.Therefore, vehicles running on natural gas usually comprise one or more pressure tankswhich accommodate the gas in liquid state under pressure and at a low temperatures. As anexample, the gas can be accommodated in a pressure tank at approximately 10 bars and ata temperature of approximately -130 degrees. The low temperature reduces the pressureneeded for keeping the gas in liquid state. The gas is gradually heated by the surroundings,and as a result thereof, the pressure in the pressure tank rises. For safety reasons, apressure tank for accommodating liquified gaseous fuel usually comprises one or morepressure relief devices arranged to reduce the pressure in the pressure tank by venting gasfrom the pressure tank to the atmosphere when the pressure in the pressure tank reaches a certain pressure level.
Methane is a potent greenhouse gas and is an even more potent greenhouse gas thancarbon dioxide due to the greater global-Warming potential of methane. The lifetime ofatmospheric methane is relatively short when compared to carbon dioxide, with a half-life ofabout 7 years. However, it is more efficient at trapping heat in the atmosphere. Therefore, agiven quantity of methane has approximately 84 times the global-Warming potential of carbondioxide over a 20-year period and approximately 28 times over a 100-year period.
Consequently, venting of gaseous fuel to the atmosphere is harmful for the environment.Moreover, in general, environmental concerns require an efficient use of energy in products and arrangements, such as in vehicles and vehicle arrangements.
SUMMARYlt is an object of the present invention to overcome, or at least alleviate, at least some of theabove-mentioned problems and drawbacks.
According to a first aspect of the invention, the object is achieved by an apparatus configuredto heat and/or cool a compartment of a vehicle, wherein the vehicle comprises a pressuretank configured to accommodate liquified gaseous fuel, the pressure tank comprising apressure relief device. The apparatus comprises an inlet conduit configured to be fluidlyconnected to the pressure relief device of the pressure tank, and a burner arranged to burngas evacuated via the pressure relief device.
Since the apparatus comprises a burner arranged to burn gas evacuated via the pressurerelief device, emission of gaseous fuel to the atmosphere is avoided. As a result, theevacuated gaseous fuel is handled in a more environmentally friendly manner. Moreover, theenergy content of the gaseous fuel is utilized in an efficient manner for the energydemanding task of heating and/or cooling the compartment of the vehicle. ln this manner, awanted temperature of the compartment of the vehicle can be obtained in an energy efficientand environmentally friendly manner, using a source of energy which previously has been wasted by venting the gaseous fuel to the atmosphere. ln addition, since the apparatus comprises a burner arranged to burn gas evacuated via thepressure relief device, the evacuated gas is handled in a safer manner. This because gasevacuated from a pressure relief device to the atmosphere may pose a safety hazard, for example if an ignition source is present in the vicinity of the pressure relief device.
Accordingly, an apparatus is provided overcoming, or at least alleviating, at least some of theabove-mentioned problems and drawbacks. As a result, the above-mentioned object isachieved.
Optionally, the apparatus is a heating apparatus configured to heat an occupantcompartment of the vehicle. Thereby, an apparatus is provided capable of obtaining awanted temperature of the occupant compartment of the vehicle in an energy efficient and environmentally friendly manner, using a source of energy which previously has been wastedby venting the gaseous fuel to the atmosphere.
Optionally, the apparatus is a cooling apparatus configured to cool a cargo compartment ofthe vehicle. Thereby, an apparatus is provided capable of obtaining a wanted temperature ofthe cargo compartment of the vehicle in an energy efficient and environmentally friendlymanner, using a source of energy which previously has been wasted by venting the gaseousfuel to the atmosphere.
According to a second aspect of the invention, the object is achieved by a vehicle assemblycomprising a pressure tank configured to accommodate liquified gaseous fuel, and anapparatus configured to heat and/or cool a compartment of a vehicle. The pressure tankcomprises a pressure relief device. The apparatus comprises an inlet conduit fluidlyconnected to the pressure relief device and a burner arranged to burn gas evacuated via the pressure relief device.
Since the vehicle assembly comprises an apparatus comprising a burner arranged to burngas evacuated via the pressure relief device, emission of gaseous fuel to the atmosphere isavoided. As a result, the evacuated gaseous fuel is handled in a more environmentallyfriendly manner. Moreover, the energy content of the gaseous fuel is utilized in an efficientmanner for the energy demanding task of heating and/or cooling the compartment of thevehicle. ln this manner, a wanted temperature of the compartment of the vehicle can beobtained in an energy efficient and environmentally friendly manner, using a source of energy which previously has been wasted by venting the gaseous fuel to the atmosphere. ln addition, since the apparatus comprises a burner arranged to burn gas evacuated via thepressure relief device, the evacuated gas is handled in a safer manner. This because gasevacuated from a pressure relief device to the atmosphere may pose a safety hazard, for example if an ignition source is present in the vicinity of the pressure relief device.
Accordingly, a vehicle assembly is provided overcoming, or at least alleviating, at least someof the above-mentioned problems and drawbacks. As a result, the above-mentioned object isachieved.
Optionally, the pressure relief device comprises an inlet in fluid communication with an innervolume of the pressure tank, an outlet in fluid communication with the inlet conduit of the apparatus, and a shut-off device movable between a closed position, in which the shut-off device prevents a flow of gas from the inlet to the outlet, and an open position, in which theshut-off device permits a flow of gas from the inlet to the outlet. Thereby, a safe and reliablecontrol of flow of gas is obtained through the pressure relief device.
Optionally, the burner is provided with a gas burning capacity exceeding the maximum flowrate of gas flowing through the pressure relief device when the shut-off device is in the openposition. Thereby, it is ensured that all of the gas evacuated via the pressure relief devicecan be burned by the burner and thus handled in an environmentally friendly manner.Moreover, it is ensured that all of the gas evacuated via the pressure relief device can beused for heating and/or cooling the compartment of the vehicle.
Optionally, the shut-off device is biased towards the closed position and is arranged to bemoved to the open position when the pressure in the pressure tank rises above apredetermined pressure level. Thereby, the pressure in the pressure tank can be controlledto a safe pressure level while gas evacuated via the pressure relief device is handled in anenvironmentally friendly manner and is used for heating and/or cooling the compartment of the vehicle.
Optionally, the vehicle assembly comprises a control arrangement configured to control theshut-off device between the closed position and the open position. Thereby, a vehicleassembly is provided capable of controlling the evacuation of gas via the pressure reliefdevice in an intelligent manner, for example in dependence of the pressure in the pressure tank and/or a heating and/or cooling demand of the compartment of the vehicle.
Optionally, the vehicle assembly comprises a pressure sensor arranged to sense thepressure in the pressure tank, and wherein the control arrangement is configured to controlthe shut-off device between the closed position and the open position based on the pressurein the pressure tank. Thereby, a vehicle assembly is provided capable of controlling theevacuation of gas via the pressure relief device in an intelligent manner based on the pressure in the pressure tank.
Optionally, the control arrangement is further configured to control the shut-off devicebetween the closed position and the open position based on a heating and/or coolingdemand of the compartment of the vehicle. Thereby, a vehicle assembly is provided capableof controlling the evacuation of gas via the pressure relief device in an intelligent mannerbased on the heating and/or cooling demand of the compartment of the vehicle. ln thismanner, a wanted temperature of the compartment of the vehicle can be obtained in a safe and environmentally friendly manner, for example when a vehicle comprising the vehicleassembly is parked for a long period of time, such as when the vehicle is parked on a cargoship, or the like.
Optionally, the control arrangement is arranged to control the shut-off device to the closedposition when the pressure in the pressure tank has been reduced by an amount within therange of 1 - 3 bars. Thereby, due to the relatively small reduction in pressure, the vehicleassembly is capable of maintaining a more even temperature of the compartment of thevehicle by performing several successive evacuations of gas via the pressure relief device.Moreover, due to the relatively small reduction in pressure, it can be ensured that a highpressure level is kept in the pressure tank for subsequent propulsion of the vehicle.
According to a third aspect of the invention, the object is achieved by a vehicle comprising avehicle assembly according to some embodiments.
Since the vehicle comprises a vehicle assembly which comprises a burner arranged to burngas evacuated via the pressure relief device, emission of gaseous fuel to the atmosphere isavoided. As a result, the evacuated gaseous fuel is handled in a more environmentallyfriendly manner. Moreover, the energy content of the gaseous fuel is utilized in an efficientmanner for the energy demanding task of heating and/or cooling the compartment of thevehicle. ln this manner, a wanted temperature of the compartment of the vehicle can beobtained in an energy efficient and environmentally friendly manner, using a source of energy which previously has been wasted by venting the gaseous fuel to the atmosphere. ln addition, since the vehicle comprises a burner arranged to burn gas evacuated via the pressure relief device, the evacuated gas is handled in a safer manner. This because gasevacuated from a pressure relief device to the atmosphere may pose a safety hazard, forexample if an ignition source is present in the vicinity of the pressure relief device.
Accordingly, a vehicle is provided overcoming, or at least alleviating, at least some of theabove-mentioned problems and drawbacks. As a result, the above-mentioned object is achieved.
Further features of, and advantages with, the present invention will become apparent whenstudying the appended claims and the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS Various aspects of the invention, including its particular features and advantages, will bereadily understood from the example embodiments discussed in the following detaileddescription and the accompanying drawings, in which: Fig. 1 illustrates a vehicle assembly according to some embodiments, andFig. 2 illustrates a vehicle comprising a vehicle assembly according to the embodimentsillustrated in Fig. 1.
DETAILED DESCRIPTION Aspects of the present invention will now be described more fully. Like numbers refer to likeelements throughout. Well-known functions or constructions will not necessarily be describedin detail for brevity and/or clarity.
Fig. 1 illustrates a vehicle assembly 20 according to some embodiments. The vehicleassembly 20 comprises a pressure tank 7 configured to accommodate liquified gaseous fuelunder pressure at low temperatures. As an example, when the pressure tank 7 is completelyfilled, the pressure in the pressure tank 7 may be approximately 10 bars and the temperatureof the gas may be approximately -130 degrees Celsius. The low temperature of the gasreduces the pressure needed for keeping the gas in liquid state. The gas is gradually heatedby the surroundings, and as a result thereof, the pressure in the pressure tank 7 rises. Thepressure tank 7 comprises a pressure relief device 9 capable of reducing the pressure in thepressure tank 7 by evacuating gas from the pressure tank 7. The pressure tank 7 isconfigured to accommodate liquified gaseous fuel which is used by a power source, such asa combustion engine, of a vehicle comprising the vehicle assembly 20 for propulsion of thevehicle.
According to the illustrated embodiments, the vehicle assembly 20 comprises twoapparatuses 1, 1”. As is further explained herein, according to the illustrated embodiments,one of the apparatuses 1, 1' is a heating apparatus 1 configured to heat an occupantcompartment of a vehicle comprising the vehicle assembly 20. The vehicle assembly 20comprises an inlet conduit 11 fluidly connecting the heating apparatus 1 to the pressure reliefdevice 9 of the pressure tank 7. The heating apparatus 1 comprises a burner 13 arranged toburn gas evacuated via the pressure relief device 9. Furthermore, the heating apparatus 1 isarranged to transfer heat generated by the burning of the gas evacuated via the pressurerelief device 9 to the compartment of the vehicle. The heating apparatus 1 may comprise aheat exchanger, one or more fan units, and a duct arrangement, wherein the burner 13 is arranged to heat the heat exchanger, the one or more fan units is/are arranged to cause a flow of air past the heat exchanger into the compartment of the vehicle, and wherein the ductarrangement is arranged to conduct exhaust gases from the combustion of the gas to thesurroundings outside of the compartment of the vehicle. Such components are not illustratedin Fig. 1 for the reason of brevity and clarity. ln addition, the heating apparatus 1 maycomprise an electrical heating element and/or a heat exchanger heated by coolant from apower source of the vehicle when no flow of gas is present from the pressure relief device 9.
Moreover, according to the illustrated embodiments, the other of the apparatuses 1, 1' is acooling apparatus 1' configured to cool a cargo compartment of a vehicle comprising thevehicle assembly 20. As can be seen in Fig. 1, the vehicle assembly 20 comprises an inletconduit 11 fluidly connecting the cooling apparatus 1' to the pressure relief device 9 of thepressure tank 7. The cooling apparatus 1' comprises a burner 13' arranged to burn gasevacuated via the pressure relief device 9. The cooling apparatus 1' is arranged to convertheat generated by the burning of gas evacuated via the pressure relief device 9 into cold, forexample using absorption refrigeration. Furthermore, the cooling apparatus 1' is arranged totransfer cooled air generated by the burning of the gas to compartment of the vehicle. Thecooling apparatus 1' may comprise an adsorption refrigerator, a heat exchanger, one or morefan units, and a duct arrangement, wherein the burner 13' may form part of the adsorptionrefrigerator, wherein the adsorption refrigerator is arranged to cool the heat exchanger, theone or more fan units is/are arranged to cause a flow of air past the heat exchanger into thecompartment of the vehicle, and wherein the duct arrangement is arranged to conductexhaust gases from the combustion of the gas to the surroundings outside of thecompartment of the vehicle. Such components are not illustrated in Fig. 1 for the reason ofbrevity and clarity. ln addition, the cooling apparatus 1' may comprise another type of coolingapparatus, and/or another type of heat source, for cooling the compartment of the vehiclewhen no flow of gas is present from the pressure relief device 9.
Fig. 2 illustrates a vehicle 5 comprising a vehicle assembly 20 according to the embodimentsillustrated in Fig. 1. As can be seen in Fig. 2, the heating apparatus 1 is configured to heat anoccupant compartment 3 of the vehicle 5 and the cooling apparatus 1' is configured to cool acargo compartment 3' of the vehicle 5. According to further embodiments, the vehicleassembly 20 may comprise only one of the heating apparatus 1 and the cooling apparatus 1'.Furthermore, the vehicle assembly 20 may comprise a heating apparatus 1, according toembodiments explained herein, configured to heat the cargo compartment 3' of the vehicle 5,and/or a cooling apparatus 1', according to embodiments explained herein, configured tocool the occupant compartment 3 of the vehicle 5. Moreover, according to someembodiments of the present disclosure, the apparatus 1, 1', as referred to herein, may be arranged to be able to perform heating and cooling of a compartment 3, 3' of a vehicle 5.Such an apparatus may comprise a heating aggregate as well as a cooling aggregate, which each may comprise a burner.
According to the illustrated embodiments, the vehicle 5 is a truck. However, according tofurther embodiments, the vehicle 5, as referred to herein, may be another type of manned orunmanned vehicle for land or water based propulsion such as a lorry, a bus, a constructionvehicle, a tractor, a car, a ship, a boat, or the like. ln the following, simultaneous reference ismade to Fig. 1 and Fig. 2.
According to the embodiments illustrated in Fig. 1, the pressure relief device 9 comprises aninlet 21 in fluid communication with an inner volume 23 of the pressure tank 7 an outlet 25 influid communication with the inlet conduit 11 of the apparatuses 1, 1'. l\/loreover, the pressurerelief device 9 comprises a shut-off device 27 movable between a closed position, in whichthe shut-off device 27 prevents a flow of gas from the inlet 21 to the outlet 25, and an openposition, in which the shut-off device 27 permits a flow of gas from the inlet 21 to the outlet25. The shut-off device 27 may be biased towards the closed position and may be arrangedto be moved to the open position when the pressure in the pressure tank 7 rises above apredetermined pressure level. ln this manner, it can be ensured that the pressure in thepressure tank 7 is kept within a predetermined pressure level.
According to the illustrated embodiments, the vehicle assembly 20 comprises a controlarrangement 29 configured to control the shut-off device 27 between the closed position andthe open position. Moreover, the vehicle assembly 20 comprises a pressure sensor 31arranged to sense the pressure in the pressure tank 7. The control arrangement 29 isconfigured to control the shut-off device 27 between the closed position and the openposition based on the pressure in the pressure tank 7. ln this manner, it can be ensured thatthe pressure in the pressure tank 7 is kept within a predetermined pressure level in a safe and intelligent manner.
According to some embodiments, the control arrangement 29 may be further configured tocontrol the shut-off device 27 between the closed position and the open position based on aheating and/or cooling demand of the compartment 3, 3' of the vehicle 5. ln this manner, awanted temperature of a compartment 3, 3' of the vehicle 5 can be obtained in a safe andenvironmentally friendly manner, for example when the vehicle 5 is parked for a long periodof time, such as when the vehicle 5 is parked on a cargo ship, or the like.
Moreover, according to some embodiments, the control arrangement 29 may be arranged tocontrol the shut-off device 27 to the closed position when the pressure in the pressure tank 7has been reduced by an amount within the range of 1 - 3 bars. Thereby, due to the relativelysmall reduction in pressure in the pressure tank 7, the vehicle assembly 20 is capable ofmaintaining a more even temperature of the compartment 3, 3' of the vehicle 5 by performingseveral successive evacuations of gas via the pressure relief device 9. Thus, according tosuch embodiments, the control arrangement 29 may be arranged to perform severalsuccessive evacuations of gas via the pressure relief device 9 to burn gas in severalsuccessive events. Moreover, due to the relatively small reduction in pressure in thepressure tank 7, it can be ensured that a high pressure level is kept in the pressure tank 7 forsubsequent propulsion of the vehicle 5.
However, also in embodiments in which the control arrangement 29 is arranged to control theshut-off device 27 to the closed position when the pressure in the pressure tank 7 has beenreduced by an amount within the range of 1 - 3 bars, the control arrangement 29 may bearranged control the shut-off device 27 to the closed position when the pressure in thepressure tank 7 has been reduced by a higher amount than 1 - 3 bars if determinedrequired, for example for safety reasons. Such a reduction in pressure may for example bewithin the range of 3 - 6 bars, or 6 - 10 bars.
According to the illustrated embodiments, each of the burners 13, 13' is provided with a gasburning capacity exceeding the maximum flow rate of gas flowing through the pressure reliefdevice 9 when the shut-off device 27 is in the open position. ln this manner, it is ensured thatall of the gas evacuated via the pressure relief device 9 can be burned by one of the burners13, 13' and that the gas thereby is handled in an environmentally friendly manner. Moreover,it is ensured that all of the gas evacuated via the pressure relief device 9 can be used forheating and/or cooling a compartment 3, 3' of the vehicle 5.
The control arrangement 29, as referred to herein, may comprise a calculation unit whichmay take the form of substantially any suitable type of processor circuit or microcomputer,e.g. a circuit for digital signal processing (digital signal processor, DSP), a CentralProcessing Unit (CPU), a processing unit, a processing circuit, a processor, an ApplicationSpecific Integrated Circuit (ASIC), a microprocessor, or other processing logic that mayinterpret and execute instructions. The herein utilised expression “calculation unit” mayrepresent a processing circuitry comprising a plurality of processing circuits, such as, e.g., any, some or all of the ones mentioned above.
The control arrangement 29 may further comprise a memory unit, wherein the calculationunit may be connected to the memory unit, which may provide the calculation unit with, forexample, stored program code and/or stored data which the calculation unit may need toenable it to do calculations. The calculation unit may also be adapted to store partial or finalresults of calculations in the memory unit. The memory unit may comprise a physical deviceutilised to store data or programs, i.e., sequences of instructions, on a temporary orpermanent basis. According to some embodiments, the memory unit may compriseintegrated circuits comprising silicon-based transistors. The memory unit may comprise e.g.a memory card, a flash memory, a USB memory, a hard disc, or another similar volatile ornon-volatile storage unit for storing data such as e.g. ROIVI (Read-Only l\/lemory), PROIVI(Programmable Read-Only Memory), EPROIVI (Erasable PROIVI), EEPROIVI (ElectricallyErasable PROIVI), etc. in different embodiments.
The control arrangement 29 may be connected to components of the vehicle 5 for receivingand/or sending input and output signals. These input and output signals may comprisewaveforms, pulses, or other attributes which the input signal receiving devices can detect asinformation and which can be converted to signals processable by the control arrangement29. These signals may then be supplied to the calculation unit. One or more output signalsending devices may be arranged to convert calculation results from the calculation unit tooutput signals for conveying to other parts of the vehicle's control system and/or thecomponent or components for which the signals are intended. Each of the connections to therespective components of the vehicle 5 for receiving and sending input and output signalsmay take the form of one or more from among a cable, a data bus, e.g. a CAN (controllerarea network) bus, a l\/IOST (media orientated systems transport) bus or some other bus configuration, or a wireless connection. ln the embodiments illustrated, the vehicle assembly 20 comprises a control arrangement 29but might alternatively be implemented wholly or partly in two or more control arrangements OI' tWO OI' mOFG COntfOl UnltS.
Control systems in modern vehicles generally comprise a communication bus systemconsisting of one or more communication buses for connecting a number of electronic controlunits (ECUs), or controllers, to various components on board the vehicle. Such a controlsystem may comprise a large number of control units and taking care of a specific functionmay be shared between two or more of them. Vehicles of the type here concerned aretherefore often provided with significantly more control arrangements 29 than depicted in Fig.1, as one skilled in the art will surely appreciate.
It is to be understood that the foregoing is illustrative of various example embodiments andthat the invention is defined only by the appended claims. A person skilled in the art willrealize that the example embodiments may be modified, and that different features of theexample embodiments may be combined to create embodiments other than those describedherein, without departing from the scope of the present invention, as defined by the appended claims.
As used herein, the term "comprising" or "comprises" is open-ended, and includes one ormore stated features, elements, steps, components or functions but does not preclude thepresence or addition of one or more other features, elements, steps, components, functions or groups thereof.

Claims (5)

1. A vehicle assembly (20) comprising: - a pressure tank (7) configured to accommodate liquified gaseous fuel, and - an apparatus (1, 1') configured to heat and/or cool a compartment (3, 3') of a vehicle(5),wherein the pressure tank (7) comprises a pressure relief device (9), and wherein the apparatus (1, 1') comprises: - an inlet conduit (11)fluidly connected to the pressure relief device (9), and - a burner (13, 13') arranged to burn gas evacuated via the pressure relief device (9),wherein the pressure relief device (9) comprises: - an inlet (21) in fluid communication with an inner volume (23) of the pressure tank(7), - an outlet (25) in fluid communication with the inlet conduit (1 1) of the apparatus (1,1'), and - a shut-off device (27) movable between a closed position, in which the shut-offdevice (27) prevents a flow of gas from the inlet (21) to the outlet (25), and an openposition, in which the shut-off device (27) permits a flow of gas from the inlet (21) tothe outlet (25),wherein the vehicle assembly (20) comprises a control arrangement (29) configuredto control the shut-off device (27) between the closed position and the open position the control arrangement (29) is arranged to control the shut-off device (27) to the closed position when the pressure in thepressure tank (7) has been reduced by an amount within the range of 1 - 3 bars,wherein the control arrangement (29) is further arranged to perform severalsuccessive evacuations of gas via the pressure relief device (9) to burn gas in several successive events.
2. The vehicle assembly (20) according to claim 1,burner (13, 13') is provided with a gas burning capacity exceeding the maximum flowrate of gas flowing through the pressure relief device (9) when the shut-off device (27) is in the open position.
3. The vehicle assembly (20) according to claim 1 or 2, shut-off device (27) is biased towards the closed position and is arranged to be moved tothe open position when the pressure in the pressure tank (7) rises above a predetermined pressure level. sense the pressure in the pressure tank (7), and wherein the control arrangement (29) isconfigured to control the shut-off device (27) between the closed position and the open position based on the pressure in the pressure tank (7).
4. The vehicle assembly (20) according to any one of claims 1-4, the control arrangement (29) is further configured to control the shut-offdevice (27) between the closed position and the open position based on a heating and/or cooling demand of the compartment (3, 3') of the vehicle (5).
5. A vehicle (5) comprisgçg a vehicle assembly (20) according to any one of the claims 1 -5.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533863A1 (en) * 1995-09-13 1997-03-20 Bayerische Motoren Werke Ag Liquefied gas e.g. LNG fuel supply unit for IC engine
DE10202165A1 (en) * 2002-01-22 2003-07-31 Bayerische Motoren Werke Ag Vehicle with cryogenic tank has at least part of freed heat from combustion able to be taken to engine or other unit of vehicle.
EP1906108A2 (en) * 2006-09-28 2008-04-02 J. Eberspächer GmbH & Co. KG Hydrogen heating
DE102014204790A1 (en) * 2014-03-14 2015-09-17 Bayerische Motoren Werke Aktiengesellschaft Fuel cell system with sorption storage in the exhaust system
DE102014019029A1 (en) * 2014-12-18 2016-06-23 Daimler Ag Method for operating a combustion device and combustion device
WO2018100073A1 (en) * 2016-12-01 2018-06-07 Volvo Truck Corporation A fuel tank arrangement

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533863A1 (en) * 1995-09-13 1997-03-20 Bayerische Motoren Werke Ag Liquefied gas e.g. LNG fuel supply unit for IC engine
DE10202165A1 (en) * 2002-01-22 2003-07-31 Bayerische Motoren Werke Ag Vehicle with cryogenic tank has at least part of freed heat from combustion able to be taken to engine or other unit of vehicle.
EP1906108A2 (en) * 2006-09-28 2008-04-02 J. Eberspächer GmbH & Co. KG Hydrogen heating
DE102014204790A1 (en) * 2014-03-14 2015-09-17 Bayerische Motoren Werke Aktiengesellschaft Fuel cell system with sorption storage in the exhaust system
DE102014019029A1 (en) * 2014-12-18 2016-06-23 Daimler Ag Method for operating a combustion device and combustion device
WO2018100073A1 (en) * 2016-12-01 2018-06-07 Volvo Truck Corporation A fuel tank arrangement

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