EP4183453A1 - Protection device, installation comprising the protection device and vehicle comprising said installation - Google Patents
Protection device, installation comprising the protection device and vehicle comprising said installation Download PDFInfo
- Publication number
- EP4183453A1 EP4183453A1 EP21306621.0A EP21306621A EP4183453A1 EP 4183453 A1 EP4183453 A1 EP 4183453A1 EP 21306621 A EP21306621 A EP 21306621A EP 4183453 A1 EP4183453 A1 EP 4183453A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- protection device
- stage
- combustible fluid
- flame
- tesla valve
- 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.)
- Pending
Links
- 238000009434 installation Methods 0.000 title claims description 22
- 239000012530 fluid Substances 0.000 claims abstract description 113
- 238000002485 combustion reaction Methods 0.000 claims abstract description 48
- 230000001590 oxidative effect Effects 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 5
- 239000011148 porous material Substances 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 10
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 9
- 239000011248 coating agent Substances 0.000 claims description 8
- 238000000576 coating method Methods 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 239000000446 fuel Substances 0.000 description 18
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical group O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 3
- 229910001882 dioxygen Inorganic materials 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000007084 catalytic combustion reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000007799 cork Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000010763 heavy fuel oil Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C4/00—Flame traps allowing passage of gas but not of flame or explosion wave
- A62C4/04—Flame traps allowing passage of gas but not of flame or explosion wave in flues or chimneys
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/06—Fire prevention, containment or extinguishing specially adapted for particular objects or places of highly inflammable material, e.g. light metals, petroleum products
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/07—Fire prevention, containment or extinguishing specially adapted for particular objects or places in vehicles, e.g. in road vehicles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C13/00—Apparatus in which combustion takes place in the presence of catalytic material
- F23C13/06—Apparatus in which combustion takes place in the presence of catalytic material in which non-catalytic combustion takes place in addition to catalytic combustion, e.g. downstream of a catalytic element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
- F23C3/002—Combustion apparatus characterised by the shape of the combustion chamber the chamber having an elongated tubular form, e.g. for a radiant tube
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L11/00—Arrangements of valves or dampers after the fire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2900/00—Special features of, or arrangements for combustion apparatus using fluid fuels or solid fuels suspended in air; Combustion processes therefor
- F23C2900/9901—Combustion process using hydrogen, hydrogen peroxide water or brown gas as fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
Definitions
- the present invention concerns a protection device configured to be in fluid communication with a combustible fluid.
- the invention also concerns an assembly comprising such a protection device.
- the invention also concerns a vehicle comprising such an installation.
- the protection device according to the invention is suitable for installations storing combustible fluid comprising fuel.
- the protection device according to the invention may be arranged in vehicles powered at least in part by fuel cells, comprising at least one tank storing combustible fluid.
- the combustible fluid stored may be for example high-pressure dihydrogen gas.
- vehicle may be fuel cell hybrid cars, trucks, buses, railway vehicles, ships, submarines, etc.
- Such combustible fluid in generally stored in tanks under pressure.
- Such tanks have generally a maximum allowable pressure tolerance and the pressure of the pressurized combustible fluid must be below this allowable pressure tolerance.
- a thermally activated pressure relief device is generally in fluid communication with the combustible fluid of the tank.
- the pressure relief device releases high-pressure combustible fluid to the exterior of the tank.
- Combustible fluid is released by the pressure relief device as a combustible gas jet.
- Such combustible gas jet released in a closed space such as a tunnel, undergrounds parks, garages, etc., can create huge pressure and temperature peak loads that can cause severe consequences to people and infrastructures.
- the combustible fluid released may create an explosive atmosphere inside the confined space that can trigger a later explosion.
- the combustible fluid released may self-ignite which could lead to at least one huge flame comprised between 2 to 15 meters or may ignite by an existing fire creating high thermal radiation in the surrounding area with hazard to people.
- One aim of the invention is to provide a protection device designed to limit said undesirable effects of the release of high-pressure combustible fluid, namely to limit the occurrence of factors that can lead to dangerous situations during the release of pressurized combustible fluid from storage tanks.
- the invention relates to a protection device configured to be in fluid communication with a combustible fluid
- the protection device comprising: a first stage, the first stage comprising a protection device inlet, a burner and at least one oxidizing fluid intake in fluid communication with the burner, the burner being configured to combust at least in part the combustible fluid with an oxidizing fluid and to eject combustion products and/or at least one flame, and a second stage, the second stage comprising a protection device outlet and at least one Tesla valve, the Tesla valve being configured to receive the ejected combustion products and/or the ejected flame and to process said ejected combustion products and/or said ejected flame.
- the protection device according to the invention may comprise one or more of the following features, taken into consideration in isolation, or according to any one of any technically feasible combinations:
- the invention also relates to an installation comprising: at least one combustible fluid tank storing combustible fluid, the combustible fluid tank comprising a combustible fluid tank outlet, for the or each combustible fluid tank, at least one associated pressure relief device in fluid communication with the combustible fluid stored in this combustible fluid tank, and a protection device as defined above, wherein the or each combustible fluid tank outlet is connected to the protection device inlet via the associated pressure relief device.
- the combustible fluid comprises dihydrogen .
- the invention also related to a vehicle, for example a railway vehicle, comprising the installation described above.
- FIG. 1 A part of a vehicle 10 is shown on figure 1 .
- the vehicle 10 is configured to be at least in part powered by fuel cells (not shown).
- a fuel cell is configured to perform a redox reaction between a fuel contained in a combustible fluid and an oxidant contained in an oxidizing fluid to produce electrical energy.
- a fuel cell comprises at least one electrochemical cell, and preferably a stack formed of a plurality of superimposed electrochemical cells, each electrochemical cell being configured to carry out the redox reaction between the fuel fluid and the oxidizing fluid.
- the vehicle 10 shown on figure 1 is a Fuell Cell Hydrogen (also known under the acronym "FCH”) powered vehicle.
- FCH Fuell Cell Hydrogen
- the vehicle 10 is for example a railway vehicle. According to other embodiments, the vehicle 10 may be a car, a truck, a bus, a ship, a submarine, etc.
- the railway vehicle 10 comprises at least one railway car 12 and an installation 14.
- the railway car 12 comprises at least one compartment 16.
- the installation 14 comprises at least one combustible fluid tank 18 ("tank 18" in the following), at least one pressure relief device 20, a protection device 22 and a defueling path 24.
- the installation 14 comprises, for example, forty-eight tanks 18 packed by subassembly of six or eight tanks 18. On figure 1 , only three tanks 18 are shown.
- a layer of cork is applied on the surface of each tank 18 for fire protection.
- Each tank 18 comprises combustible fluid 26.
- Each tank 18 delimits, for example, an internal volume of 350 liters (L).
- Combustible fluid 26 is stored under pressure in each tank 18. In other words, the combustible fluid 26 is pressurized in each tank 18.
- Combustible fluid 26 is, for example, stored in a gaseous state in each tank 18.
- the pressure of the combustible fluid 26 in each tank 18 is substantially comprised between 35 Mega Pascal (MPa) and 70 MPa.
- the combustible fluid 26 comprises dihydrogen, the dihydrogen being the fuel.
- the tank 18 comprises a tank outlet 18B.
- Each tank 18 is fluidly connected to at least one fuel cell to supply the fuel cell with combustible fluid.
- the installation 10 comprises at least one pressure relief device 20.
- the installation 10 comprises two pressure relief devices 20 per tank 18.
- Each pressure relief device 20 is for example a pressure relief valve.
- Each pressure relief device 20 comprises a pressure relief device inlet 20A and a pressure relief device outlet 20B.
- each of the three tanks 18 are fluidly connected to two associated pressure relief devices 20.
- Each tank 18 is connected to the associated pressure relief devices 20 by a duct 28.
- each outlet 18B of the three tanks 18 are connected to a respective pressure relief device inlet 20A.
- the pressure relief device outlet 20B is connected to the protection device 22 and, in particular, to a protection device inlet 22A.
- Each pressure relief devices 20 are connected to the protection device 22 by a release duct 30.
- the installation 10 comprises a vent 31 interposed between the outlet 20B of each pressure relief device 20 and the release duct 30.
- the pressure relief device 20 is configured to release a quantity of combustible fluid 26 at the pressure relief device outlet 20B when the temperature inside the pressure relief device 20 is superior or equal to a predefined temperature.
- the predefined temperature is substantially equal to 110 degrees Celsius (C°).
- the protection device 22 is configured to be in fluid communication with the combustible fluid 26.
- the protection device 22 is configured to be in fluid communication with the combustible fluid 26 released by each pressure relief device 20.
- the protection device 22 comprises a protection device inlet 22A of the combustible fluid 26 in the protection device 22, a protection device outlet 22B, a first stage 34 and a second stage 36.
- a principal flow direction FD is defined for the protection device 22 from the protection device inlet 22A towards the protection device outlet 22B.
- the protection device inlet 22A is configured to admit combustible fluid 26 released from each pressure relief device 20.
- the protection device outlet 22B opens at the exterior of the protection device 22 and namely in this example at the exterior of the railway vehicle 10.
- the protection device 22 extends along an extension axis A.
- the first stage 34 comprises the protection device inlet 22A, a first stage fairing 38, at least one oxidizing fluid intake 40, a burner 42, a heat dissipation central hole 44 and a first stage exit 34B.
- the first stage 34 is arranged upstream of the second stage 36 with respect to the principal flow direction FD.
- the protection device inlet 22A corresponds to a first stage entry.
- the combustible fluid 26 at the protection device inlet 22A has a first temperature T1.
- the first temperature T1 is substantially equal to 2000 degrees Celsius (°C).
- the first stage fairing 38 houses the burner 42.
- the first stage fairing 38 has an aerodynamic shape.
- the oxidizing fluid intake 40 is configured to admit oxidizing fluid 46 inside the first stage 34.
- the oxidizing fluid intake 40 is in fluid communication with the burner 42.
- the oxidizing fluid intake 40 is, for example, a through hole arranged in the first stage fairing 38.
- the installation 14 may comprise a blower (not shown) associated to the oxidizing fluid intake 40 to favor admission of oxidizing fluid 46 inside the first stage 34.
- the oxidizing fluid 46 is, for example, air and the oxidant is dioxygen contained in air.
- air is configured to pass through the oxidizing fluid intake 40 from the exterior of the railway vehicle 10 to the inside of the first stage 34 to supply the burner 42 with the dioxygen.
- the burner 42 is configured to combust or burn at least in part the combustible fluid 26 with the oxidizing fluid 46 and to eject combustion products and/or at least one flame.
- the burner 42 is configured to eject combustion products and at least one flame.
- Such combustion corresponds to the oxidation of dihydrogen by dioxygen.
- the combustion products comprise water (H 2 O).
- the combustion products may also comprise gases.
- gases may comprise dihydrogen not burned during the reaction and/or nitrogen oxide (NOx).
- the flame corresponds to the exothermic chemical reaction between the fuel of the combustible fluid 26 and oxidant of the oxidizing fluid 46.
- the burner 42 comprises a porous body 48 and at a plurality of oxidizing fluid supply apertures 50.
- the porous body 48 comprises pores. Each pore delimits a small cavity.
- the diameter of each pore of the porous body 48 is comprised between 0.1 and 0.5 millimeters (mm).
- the porous body 48 is made in a material.
- the porous body 48 is a foam.
- the material comprises for example silicon carbide (SiC). More preferably, the material comprises silicon-infiltrated silicon carbide (SiSiC). As a particular example, the porous body 48 is a SiSiC foam.
- Each pore corresponds to a unitary combustion chamber.
- the porous body 48 has substantially the shape of a torus.
- the burner 42 comprises a coating material coating the porous body 48.
- the coating material covers the porous body 48.
- the coating material is for example a catalyzer.
- the catalyzer comprises for example palladium or platinium.
- the catalyzer is configured to accelerate the combustion. Moreover, the catalyzer is configured to increase the flame power density.
- a length of the burner 42 depends on the dihydrogen flow rate to dissipate.
- the length of the burner 42 along the extension axis A is comprised between 300 mm and 1500 mm particularly between 1000 mm and 1500 mm.
- the heat dissipation central hole 44 extends along a direction parallel to the extension axis A.
- the heat dissipation central hole 44 opens at the protection device inlet 22A and at the first stage exit 34B.
- the heat dissipation central hole 44 is defined by the torus shape of the porous body 48.
- Second temperature T2 is substantially equal to 60% of temperature T1.
- second temperature T2 is substantially equal to 1200°C.
- the second stage 36 comprises a second stage entry 36A, the protection device outlet 22B, a second stage fairing 56, at least one Tesla valve 58 and at least one heat dissipation central hole 60.
- the second stage entry 36A and the first stage exit 34B are adjacent.
- the second stage entry 36A is configured to receive the ejected combustion products 52E and the ejected flame 54E produced in the first stage 34.
- the second stage 36 is configured to process the ejected combustion products 52E and the ejected flame 54E generated in the first stage 34 to produce, respectively, processed combustion products 52P and at least one processed flame 54P.
- the second stage fairing 56 houses the Tesla valve 58.
- the Tesla valve 58 extends along the extension axis A.
- the Tesla valve 58 also known by the term “valvular conduit” is known per se.
- the Tesla valve 58 is a check valve. In order words, the Tesla valve 58 is a one-way valve.
- the Tesla valve 58 is configured to allow the fluid to flow in a direction substantially parallel to the principal flow direction FD.
- the Tesla valve 58 has a fixed geometry, meaning that it does not comprise moving parts.
- the Tesla valve 58 comprises a Tesla valve body 62 and at least one Tesla valve channel 64 arranged in the Tesla valve body 62.
- the Tesla valve 58 comprises two Tesla valve channels 64.
- Each Tesla valve channel 64 comprises a tubular shape in a plane perpendicular to the extension axis A.
- the or each Tesla valve channel 64 comprises a lateral wall 66 and a plurality of deviation walls 68.
- the lateral wall 66 and the plurality of deviation walls 68 delimit a primary segment PS and a plurality of secondary segments SS.
- the primary segment PS extends substantially along the extension axis A.
- a primary flow direction is defined.
- the primary flow direction presents substantially the same orientation as the principal flow direction FD.
- Each secondary segment SS corresponds substantially to a deviation loop.
- each secondary segment SS a secondary flow direction is defined.
- the secondary flow direction is different from the primary flow direction.
- the secondary flow direction is substantially opposed to the primary flow direction FD.
- the flow direction has not been represented for all secondary SS but for some secondary segments SS only in order to not to impede the readability of the figures.
- the protection device outlet 22B is configured to release the processed combusted products 52P and the processed flame 54P.
- the processed combustible fluid 52P and the processed flame 54P at the protection device outlet 22B has each a third temperature T3.
- the third temperature T3 is substantially equal to 50% of temperature T2.
- Third temperature T3 is substantially equal to 600°C.
- a shape of the or each Tesla valve channel 64 is such that the third temperature T3 of the processed combustible fluid 52P and the processed flame 54P is strictly inferior to the second temperature T2 of the ejected combustion products 52E and the ejected flame 54E from the first stage exit 34B.
- the or each Tesla valve channel 64 is such that the processed combustion products 52P differ from the ejected combustion products 52E by at least another parameter than temperature chosen in the following list:
- the velocity and the pressure of the processed combustion products 52P are, respectively, strictly inferior to the velocity and the pressure of the ejected combustion products 52E.
- Tesla valve 58 is be configured to burn residual fuel not burned in the first stage 34.
- a shape of the or each Tesla valve channel 64 is such that the third temperature T3 of the processed flame 54P is strictly inferior to the second temperature T2 of the ejected flame 54E from the first stage 34.
- a shape of the or each Tesla valve channel 64 is such that the velocity of the processed flame 54P is strictly inferior to the velocity of the ejected flame 54E.
- the Tesla valve 58 may be obtained by additive manufacturing, for example by Direct Metal Laser Sintering (also known by "DMLS").
- the Tesla valve 58 comprises an alloy of titanium and aluminum such as Ti 6 Al 4 .
- a length of the Tesla valve 58 along the extension axis A depends on how many megawatts (MW) have to be dissipated.
- the length of the Tesla valve 58 is, for example, comprised between 300 mm and 1500 mm, specifically between 1000 mm and 1500 mm.
- the defueling path 24 of the installation 14 extends from the or each tank 18 to the protection device outlet 22B passing through the at least one relief pressure device 20.
- the protection device 22 is arranged at the exterior of the vehicle 10.
- the protection device 22 is attached on the top of the vehicle 10.
- a method of protection of the installation 14 is described in the following.
- the associated pressure relief valve 20 thus releases by its outlet 20B a quantity of combustible fluid 26 in the protection device 22 via the release duct 30.
- Pressure of the combustible fluid 26 released by the pressure relief device 20 is superior or equal to the ambient pressure which is substantially equal to one atmosphere (Atm) (one atmosphere being equal to 101 325 Pa).
- the released combustible fluid 26 enters the protection device 22 by the protection device inlet 22A.
- the released combustible fluid 26 then enters successively in the first stage 34 and the second stage 36 following the principal flow direction FD.
- the released combustible fluid 26 enters the protection device 22 by the protection device inlet 22A and reaches the burner 42.
- the released combustible fluid 26 is distributed progressively in the pores of the porous body 48 of the burner 42.
- Burner 42 is supplied with oxidizing fluid 46 through the oxidizing fluid intake 40.
- the oxidizing fluid 46 enters inside the burner 42 via the plurality of oxidizing fluid supply apertures 50.
- Combustion of the combustible fluid 26 with the oxidizing fluid 46 takes place in the burner 42.
- Unitary combustions generate unitary combustion products and/or small flames. Such unitary combustions could be direct combustion or a catalytic combustion.
- the burner 42 then ejects the combustion products 52E and at least one flame 54E.
- the ejected combustion products 52E correspond to the resultant of the unitary combustion products.
- the ejected flame 54E correspond to the resultant of the small flames generated in the porous body 48.
- the ejected combustion products 52E and the ejected flame 54E from the first stage 34 exit the first stage 34 by the first stage exit 34B and enters the second stage 36 and in particular in the Tesla valve 58 by the second stage entry 36A.
- the temperature of the ejected combustion products 52E and the ejected flame 54E are each equal to the second temperature T2 which is strictly inferior to the first temperature T1.
- the ejected combustion products 52E and the ejected flame 54E are distributed in each Tesla valve channel 64 of the Tesla valve 58 and are processed inside each Tesla valve channel 64.
- the Tesla valve 58 creates a flow resistance with respect to the principal flow direction FD.
- the ejected segments PS and the secondary segments SS create, inter alia, vortices in the flow and flow loss.
- Said flow resistance causes a temperature decrease of the fluid and flame flowing in each Tesla valve channel 64.
- the temperature of the processed combustion products 52P and the processed flame 54P at the protection device outlet 22B are each equal to the third temperature T3 which is strictly inferior to the second temperature T2.
- Said flow resistance also causes a velocity and pressure decrease of the fluid flowing in each Tesla valve channel 64.
- the processed combustion products 52P at the protection device outlet 22B thus have a pressure strictly inferior to the pressure of the ejected combustion products 52E by the first stage 34 and a velocity strictly inferior to the pressure of the ejected combustion products 52E by the first stage 34.
- Said flow resistance also causes a decrease of the velocity of the flame passing through the or each Tesla valve channel 64.
- the processed flame 54P at the protection device outlet 22B have a velocity strictly inferior to the velocity of the ejected flame 54E by the first stage 34 entering the second stage 36.
- the processed combustion products 52P and the processed flame 54P exit the second stage 36 by the protection device outlet 22B.
- the protection device 22 enables to limit the quantity of fuel released in the atmosphere as compared to installations that do not comprise such protection device 22.
- the protection device 22 enables to obtain at the protection device outlet 22B a third temperature T3 of the processed combustion products 52P and the processed flame 54P which is strictly inferior to the temperature of the combustible fluid entering the protection device 22 by the outlet 22A.
- the protection device 22 acts as a temperature reducer.
- the temperature of the fluid between the protection device inlet 22A and the first stage exit 34B is reduced from T1 to T2.
- the temperature of the fluid between the second stage 36 entry and the protection device outlet 22B is reduced from T2 to T3.
- the protection device 22 enables to reduce a flame length at the protection device outlet 22B as compared to a flame length ejected by an installation that do not comprise such protection device 22.
- the length of the processed flame 54P at the protection device outlet 22B is strictly inferior to the length of the flame generated at the pressure relief valve outlet in an installation that do not comprise the protection device 22 according to the invention.
- the flame length depends on the diameter of the pores of the porous body 48. The more the diameter of the pores decreases the more the flame length decreases.
- a diameter of each pore of the porous body 48 is comprised between 0.1 and 0.5 mm enables to obtain an acceptable flame length in terms of safety at the protection device outlet 22B.
- the porous body 48 generates several small flames, for example of 10 to 20 mm, instead of one huge flame of 10 meters (m) for an installation that does not comprise the protection device 22 according to the invention.
- the second stage 36 enables to reduce the pressure and the velocity of the ejected combustion products 52E and the velocity of the ejected flame 54E.
- the protection device 22 thus enables to limit the occurrence of factors that can lead to dangerous situations during the release of pressurized fuel stored in tanks.
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Abstract
Description
- The present invention concerns a protection device configured to be in fluid communication with a combustible fluid. The invention also concerns an assembly comprising such a protection device. The invention also concerns a vehicle comprising such an installation.
- The protection device according to the invention is suitable for installations storing combustible fluid comprising fuel.
- In particular, the protection device according to the invention may be arranged in vehicles powered at least in part by fuel cells, comprising at least one tank storing combustible fluid. The combustible fluid stored may be for example high-pressure dihydrogen gas. Such vehicle may be fuel cell hybrid cars, trucks, buses, railway vehicles, ships, submarines, etc.
- Such combustible fluid in generally stored in tanks under pressure. Such tanks have generally a maximum allowable pressure tolerance and the pressure of the pressurized combustible fluid must be below this allowable pressure tolerance.
- In case of accident involving a temperature increase or a fire lapping the storage tank of high-pressure combustible fluid, the resistance of the storage tank under fire is rapidly degraded due to fire. Indeed, the internal pressure increase and this can lead to the risk of storage burst of the storage tank. In order to reduce pressure of the combustible gas inside the tank in order to avoid explosion of the tank, a thermally activated pressure relief device is generally in fluid communication with the combustible fluid of the tank. When a predefined temperature of the pressurized combustible fluid in the tank is reached, the pressure relief device releases high-pressure combustible fluid to the exterior of the tank. Combustible fluid is released by the pressure relief device as a combustible gas jet. Such combustible gas jet released in a closed space such as a tunnel, undergrounds parks, garages, etc., can create huge pressure and temperature peak loads that can cause severe consequences to people and infrastructures.
- Moreover, the combustible fluid released may create an explosive atmosphere inside the confined space that can trigger a later explosion.
- Furthermore, the combustible fluid released may self-ignite which could lead to at least one huge flame comprised between 2 to 15 meters or may ignite by an existing fire creating high thermal radiation in the surrounding area with hazard to people.
- One aim of the invention is to provide a protection device designed to limit said undesirable effects of the release of high-pressure combustible fluid, namely to limit the occurrence of factors that can lead to dangerous situations during the release of pressurized combustible fluid from storage tanks.
- For this purpose, the invention relates to a protection device configured to be in fluid communication with a combustible fluid, the protection device comprising: a first stage, the first stage comprising a protection device inlet, a burner and at least one oxidizing fluid intake in fluid communication with the burner, the burner being configured to combust at least in part the combustible fluid with an oxidizing fluid and to eject combustion products and/or at least one flame, and a second stage, the second stage comprising a protection device outlet and at least one Tesla valve, the Tesla valve being configured to receive the ejected combustion products and/or the ejected flame and to process said ejected combustion products and/or said ejected flame.
- The protection device according to the invention may comprise one or more of the following features, taken into consideration in isolation, or according to any one of any technically feasible combinations:
- the first stage comprises a first stage exit and the second stage comprises a second stage entry, the first stage exit and the second stage entry being adjacent.
- the burner comprises a porous body comprising pores.
- the diameter of each pore of the porous body is comprised between 0.1 and 0.5 millimeters.
- the porous body is coated with a coating material, the coating material being a catalyzer.
- the Tesla valve defines at least one Tesla valve channel, the or each Tesla valve channel having a tubular shape.
- the Tesla valve defines at least one Tesla valve channel, a shape of the Tesla valve channel being such that the temperature of the processed combustion products is strictly inferior to the temperature of the ejected combustion products from the first stage and/or the temperature of the processed flame is strictly inferior to the temperature of the ejected flame from the first stage.
- the protection device extends along an extension axis, a length of the burner along the extension axis being comprised between 300 millimeters and 1500 millimeters and a length of the Tesla along the extension axis being comprised between 300 and 1500 millimeters.
- the protection device extends along an extension axis, the first stage and/or the second stage each comprising a heat dissipation central hole extending along the extension axis.
- The invention also relates to an installation comprising: at least one combustible fluid tank storing combustible fluid, the combustible fluid tank comprising a combustible fluid tank outlet, for the or each combustible fluid tank, at least one associated pressure relief device in fluid communication with the combustible fluid stored in this combustible fluid tank, and a protection device as defined above, wherein the or each combustible fluid tank outlet is connected to the protection device inlet via the associated pressure relief device.
- According to some embodiments, the combustible fluid comprises dihydrogen .
- The invention also related to a vehicle, for example a railway vehicle, comprising the installation described above.
- The invention and its advantages will be better understood upon reading the following description, which is given solely by way of non-limiting example and which is made with reference to the appended drawings, in which:
-
figure 1 is a schematic profile view of a railway vehicle comprising a protection device, -
figure 2 is a cross-sectional view of a burner and Tesla valves of the protection device, and -
figure 3 is an enlarged view of portion III offigure 2 . - A part of a
vehicle 10 is shown onfigure 1 . - The
vehicle 10 is configured to be at least in part powered by fuel cells (not shown). - A fuel cell is configured to perform a redox reaction between a fuel contained in a combustible fluid and an oxidant contained in an oxidizing fluid to produce electrical energy.
- A fuel cell comprises at least one electrochemical cell, and preferably a stack formed of a plurality of superimposed electrochemical cells, each electrochemical cell being configured to carry out the redox reaction between the fuel fluid and the oxidizing fluid.
- The
vehicle 10 shown onfigure 1 is a Fuell Cell Hydrogen (also known under the acronym "FCH") powered vehicle. - The
vehicle 10 is for example a railway vehicle. According to other embodiments, thevehicle 10 may be a car, a truck, a bus, a ship, a submarine, etc. - The
railway vehicle 10 comprises at least onerailway car 12 and aninstallation 14. - The
railway car 12 comprises at least onecompartment 16. - The
installation 14 comprises at least one combustible fluid tank 18 ("tank 18" in the following), at least onepressure relief device 20, aprotection device 22 and a defuelingpath 24. - The
installation 14 comprises, for example, forty-eighttanks 18 packed by subassembly of six or eighttanks 18. Onfigure 1 , only threetanks 18 are shown. - Advantageously, a layer of cork is applied on the surface of each
tank 18 for fire protection. - Each
tank 18 comprisescombustible fluid 26. - Each
tank 18 delimits, for example, an internal volume of 350 liters (L). -
Combustible fluid 26 is stored under pressure in eachtank 18. In other words, thecombustible fluid 26 is pressurized in eachtank 18. -
Combustible fluid 26 is, for example, stored in a gaseous state in eachtank 18. - As an example, the pressure of the
combustible fluid 26 in eachtank 18 is substantially comprised between 35 Mega Pascal (MPa) and 70 MPa. - In the present example, the
combustible fluid 26 comprises dihydrogen, the dihydrogen being the fuel. - The
tank 18 comprises atank outlet 18B. - Each
tank 18 is fluidly connected to at least one fuel cell to supply the fuel cell with combustible fluid. - For each
tank 18, theinstallation 10 comprises at least onepressure relief device 20. - In the particular example of
figure 1 , theinstallation 10 comprises twopressure relief devices 20 pertank 18. - Each
pressure relief device 20 is for example a pressure relief valve. - Each
pressure relief device 20 comprises a pressure relief device inlet 20A and a pressurerelief device outlet 20B. - As shown on
figure 1 , each of the threetanks 18 are fluidly connected to two associatedpressure relief devices 20. - Each
tank 18 is connected to the associatedpressure relief devices 20 by aduct 28. - In the particular example shown on
figure 1 , eachoutlet 18B of the threetanks 18 are connected to a respective pressurerelief device inlet 20A. - Moreover, the pressure
relief device outlet 20B is connected to theprotection device 22 and, in particular, to aprotection device inlet 22A. - Each
pressure relief devices 20 are connected to theprotection device 22 by arelease duct 30. - Optionally, the
installation 10 comprises avent 31 interposed between theoutlet 20B of eachpressure relief device 20 and therelease duct 30. - The
pressure relief device 20 is configured to release a quantity ofcombustible fluid 26 at the pressurerelief device outlet 20B when the temperature inside thepressure relief device 20 is superior or equal to a predefined temperature. - According to an example, the predefined temperature is substantially equal to 110 degrees Celsius (C°).
- The
protection device 22 is configured to be in fluid communication with thecombustible fluid 26. - More precisely, as shown on
figure 1 , theprotection device 22 is configured to be in fluid communication with thecombustible fluid 26 released by eachpressure relief device 20. - The
protection device 22 comprises aprotection device inlet 22A of thecombustible fluid 26 in theprotection device 22, aprotection device outlet 22B, afirst stage 34 and asecond stage 36. - As shown on
figure 2 , a principal flow direction FD is defined for theprotection device 22 from theprotection device inlet 22A towards theprotection device outlet 22B. - The
protection device inlet 22A is configured to admitcombustible fluid 26 released from eachpressure relief device 20. - The
protection device outlet 22B opens at the exterior of theprotection device 22 and namely in this example at the exterior of therailway vehicle 10. - The
protection device 22 extends along an extension axis A. - The
first stage 34 comprises theprotection device inlet 22A, a first stage fairing 38, at least one oxidizingfluid intake 40, aburner 42, a heat dissipationcentral hole 44 and afirst stage exit 34B. - The
first stage 34 is arranged upstream of thesecond stage 36 with respect to the principal flow direction FD. - The
protection device inlet 22A corresponds to a first stage entry. - The
combustible fluid 26 at theprotection device inlet 22A has a first temperature T1. - For example, the first temperature T1 is substantially equal to 2000 degrees Celsius (°C).
- The first stage fairing 38 houses the
burner 42. For example, the first stage fairing 38 has an aerodynamic shape. - The oxidizing
fluid intake 40 is configured to admit oxidizingfluid 46 inside thefirst stage 34. - The oxidizing
fluid intake 40 is in fluid communication with theburner 42. - The oxidizing
fluid intake 40 is, for example, a through hole arranged in the first stage fairing 38. - According a particular example, the
installation 14 may comprise a blower (not shown) associated to the oxidizingfluid intake 40 to favor admission of oxidizingfluid 46 inside thefirst stage 34. - The oxidizing
fluid 46 is, for example, air and the oxidant is dioxygen contained in air. - In other words, air is configured to pass through the oxidizing
fluid intake 40 from the exterior of therailway vehicle 10 to the inside of thefirst stage 34 to supply theburner 42 with the dioxygen. - The
burner 42 is configured to combust or burn at least in part thecombustible fluid 26 with the oxidizingfluid 46 and to eject combustion products and/or at least one flame. - In the particular example disclosed in the present description, the
burner 42 is configured to eject combustion products and at least one flame. - Such combustion corresponds to the oxidation of dihydrogen by dioxygen.
- The combustion products comprise water (H2O). The combustion products may also comprise gases. Such gases may comprise dihydrogen not burned during the reaction and/or nitrogen oxide (NOx).
- The flame corresponds to the exothermic chemical reaction between the fuel of the
combustible fluid 26 and oxidant of the oxidizingfluid 46. - As shown on
figure 2 , theburner 42 comprises aporous body 48 and at a plurality of oxidizingfluid supply apertures 50. - The
porous body 48 comprises pores. Each pore delimits a small cavity. - The diameter of each pore of the
porous body 48 is comprised between 0.1 and 0.5 millimeters (mm). - The
porous body 48 is made in a material. - For example, the
porous body 48 is a foam. - The material comprises for example silicon carbide (SiC). More preferably, the material comprises silicon-infiltrated silicon carbide (SiSiC). As a particular example, the
porous body 48 is a SiSiC foam. - Each pore corresponds to a unitary combustion chamber.
- The
porous body 48 has substantially the shape of a torus. - According to a specific example, the
burner 42 comprises a coating material coating theporous body 48. In other words, the coating material covers theporous body 48. - The coating material is for example a catalyzer. The catalyzer comprises for example palladium or platinium.
- The catalyzer is configured to accelerate the combustion. Moreover, the catalyzer is configured to increase the flame power density.
- A length of the
burner 42 depends on the dihydrogen flow rate to dissipate. As a non-limitative example, the length of theburner 42 along the extension axis A is comprised between 300 mm and 1500 mm particularly between 1000 mm and 1500 mm. - The heat dissipation
central hole 44 extends along a direction parallel to the extension axis A. - The heat dissipation
central hole 44 opens at theprotection device inlet 22A and at thefirst stage exit 34B. - The heat dissipation
central hole 44 is defined by the torus shape of theporous body 48. - The ejected
combustion products 52E and the ejectedflame 54E at thefirst stage exit 34B have each a second temperature T2. Second temperature T2 is substantially equal to 60% of temperature T1. - As an example, second temperature T2 is substantially equal to 1200°C.
- The
second stage 36 comprises asecond stage entry 36A, theprotection device outlet 22B, a second stage fairing 56, at least oneTesla valve 58 and at least one heat dissipationcentral hole 60. - The
second stage entry 36A and thefirst stage exit 34B are adjacent. - The
second stage entry 36A is configured to receive the ejectedcombustion products 52E and the ejectedflame 54E produced in thefirst stage 34. - The
second stage 36 is configured to process the ejectedcombustion products 52E and the ejectedflame 54E generated in thefirst stage 34 to produce, respectively, processedcombustion products 52P and at least one processedflame 54P. - The second stage fairing 56 houses the
Tesla valve 58. TheTesla valve 58 extends along the extension axis A. - The
Tesla valve 58 also known by the term "valvular conduit" is known per se. - The
Tesla valve 58 is a check valve. In order words, theTesla valve 58 is a one-way valve. - In particular, the
Tesla valve 58 is configured to allow the fluid to flow in a direction substantially parallel to the principal flow direction FD. - The
Tesla valve 58 has a fixed geometry, meaning that it does not comprise moving parts. - The
Tesla valve 58 comprises aTesla valve body 62 and at least oneTesla valve channel 64 arranged in theTesla valve body 62. - As an example and as shown on
figure 2 , theTesla valve 58 comprises twoTesla valve channels 64. - Each
Tesla valve channel 64 comprises a tubular shape in a plane perpendicular to the extension axis A. - As an example and as shown on
figure 3 , the or eachTesla valve channel 64 comprises alateral wall 66 and a plurality ofdeviation walls 68. - The
lateral wall 66 and the plurality ofdeviation walls 68 delimit a primary segment PS and a plurality of secondary segments SS. - The primary segment PS extends substantially along the extension axis A.
- In the primary segment PS, a primary flow direction is defined.
- The primary flow direction presents substantially the same orientation as the principal flow direction FD.
- Each secondary segment SS corresponds substantially to a deviation loop.
- In each secondary segment SS, a secondary flow direction is defined.
- The secondary flow direction is different from the primary flow direction. In particular, at the end of each secondary segment SS, the secondary flow direction is substantially opposed to the primary flow direction FD.
- The flow direction has not been represented for all secondary SS but for some secondary segments SS only in order to not to impede the readability of the figures.
- The
protection device outlet 22B is configured to release the processed combustedproducts 52P and the processedflame 54P. - The processed
combustible fluid 52P and the processedflame 54P at theprotection device outlet 22B has each a third temperature T3. The third temperature T3 is substantially equal to 50% of temperature T2. - Third temperature T3 is substantially equal to 600°C.
- A shape of the or each
Tesla valve channel 64 is such that the third temperature T3 of the processedcombustible fluid 52P and the processedflame 54P is strictly inferior to the second temperature T2 of the ejectedcombustion products 52E and the ejectedflame 54E from thefirst stage exit 34B. - The or each
Tesla valve channel 64 is such that the processedcombustion products 52P differ from the ejectedcombustion products 52E by at least another parameter than temperature chosen in the following list: - the velocity,
- the pressure, and
- the composition.
- In particular, the velocity and the pressure of the processed
combustion products 52P are, respectively, strictly inferior to the velocity and the pressure of the ejectedcombustion products 52E. - Moreover, the
Tesla valve 58 is be configured to burn residual fuel not burned in thefirst stage 34. - A shape of the or each
Tesla valve channel 64 is such that the third temperature T3 of the processedflame 54P is strictly inferior to the second temperature T2 of the ejectedflame 54E from thefirst stage 34. - A shape of the or each
Tesla valve channel 64 is such that the velocity of the processedflame 54P is strictly inferior to the velocity of the ejectedflame 54E. - The
Tesla valve 58 may be obtained by additive manufacturing, for example by Direct Metal Laser Sintering (also known by "DMLS"). - For example the
Tesla valve 58 comprises an alloy of titanium and aluminum such as Ti6Al4. - A length of the
Tesla valve 58 along the extension axis A depends on how many megawatts (MW) have to be dissipated. As a non-limitative example, the length of theTesla valve 58 is, for example, comprised between 300 mm and 1500 mm, specifically between 1000 mm and 1500 mm. - The
defueling path 24 of theinstallation 14 extends from the or eachtank 18 to theprotection device outlet 22B passing through the at least onerelief pressure device 20. - The
protection device 22 is arranged at the exterior of thevehicle 10. - For example, the
protection device 22 is attached on the top of thevehicle 10. - A method of protection of the
installation 14 is described in the following. - When pressure of the
combustible fluid 26 stored in the or eachtank 18 reaches the predefined pressure, thedefueling path 24 is activated. - The associated
pressure relief valve 20 thus releases by itsoutlet 20B a quantity ofcombustible fluid 26 in theprotection device 22 via therelease duct 30. - Pressure of the
combustible fluid 26 released by thepressure relief device 20 is superior or equal to the ambient pressure which is substantially equal to one atmosphere (Atm) (one atmosphere being equal to 101 325 Pa). - The released
combustible fluid 26 enters theprotection device 22 by theprotection device inlet 22A. - The released
combustible fluid 26 then enters successively in thefirst stage 34 and thesecond stage 36 following the principal flow direction FD. - In particular, the released
combustible fluid 26 enters theprotection device 22 by theprotection device inlet 22A and reaches theburner 42. - The released
combustible fluid 26 is distributed progressively in the pores of theporous body 48 of theburner 42. -
Burner 42 is supplied with oxidizingfluid 46 through the oxidizingfluid intake 40. - Then the oxidizing
fluid 46 enters inside theburner 42 via the plurality of oxidizingfluid supply apertures 50. - Combustion of the
combustible fluid 26 with the oxidizingfluid 46 takes place in theburner 42. - In particular, a plurality of unitary combustions take place in each pore of the
porous body 48. - Unitary combustions generate unitary combustion products and/or small flames. Such unitary combustions could be direct combustion or a catalytic combustion.
- The
burner 42 then ejects thecombustion products 52E and at least oneflame 54E. The ejectedcombustion products 52E correspond to the resultant of the unitary combustion products. The ejectedflame 54E correspond to the resultant of the small flames generated in theporous body 48. - The ejected
combustion products 52E and the ejectedflame 54E from thefirst stage 34 exit thefirst stage 34 by thefirst stage exit 34B and enters thesecond stage 36 and in particular in theTesla valve 58 by thesecond stage entry 36A. - The temperature of the ejected
combustion products 52E and the ejectedflame 54E are each equal to the second temperature T2 which is strictly inferior to the first temperature T1. - The ejected
combustion products 52E and the ejectedflame 54E are distributed in eachTesla valve channel 64 of theTesla valve 58 and are processed inside eachTesla valve channel 64. - The
Tesla valve 58 creates a flow resistance with respect to the principal flow direction FD. - In particular, the ejected segments PS and the secondary segments SS create, inter alia, vortices in the flow and flow loss.
- Said flow resistance causes a temperature decrease of the fluid and flame flowing in each
Tesla valve channel 64. - In particular, the temperature of the processed
combustion products 52P and the processedflame 54P at theprotection device outlet 22B are each equal to the third temperature T3 which is strictly inferior to the second temperature T2. - Said flow resistance also causes a velocity and pressure decrease of the fluid flowing in each
Tesla valve channel 64. - The processed
combustion products 52P at theprotection device outlet 22B thus have a pressure strictly inferior to the pressure of the ejectedcombustion products 52E by thefirst stage 34 and a velocity strictly inferior to the pressure of the ejectedcombustion products 52E by thefirst stage 34. - Said flow resistance also causes a decrease of the velocity of the flame passing through the or each
Tesla valve channel 64. - Additionally, the processed
flame 54P at theprotection device outlet 22B have a velocity strictly inferior to the velocity of the ejectedflame 54E by thefirst stage 34 entering thesecond stage 36. - The processed
combustion products 52P and the processedflame 54P exit thesecond stage 36 by theprotection device outlet 22B. - The
protection device 22 according to the invention enables to limit the quantity of fuel released in the atmosphere as compared to installations that do not comprisesuch protection device 22. - Thanks to the
first stage 34 of theprotection device 22, at least 90% of the fuel of thecombustible fluid 26 is burned. - Moreover, the
protection device 22 enables to obtain at theprotection device outlet 22B a third temperature T3 of the processedcombustion products 52P and the processedflame 54P which is strictly inferior to the temperature of the combustible fluid entering theprotection device 22 by theoutlet 22A. - In other words, the
protection device 22 acts as a temperature reducer. - In particular, thanks to the
first stage 34, the temperature of the fluid between theprotection device inlet 22A and thefirst stage exit 34B is reduced from T1 to T2. Thanks to thesecond stage 36, the temperature of the fluid between thesecond stage 36 entry and theprotection device outlet 22B is reduced from T2 to T3. - Additionally, the
protection device 22 according to the invention enables to reduce a flame length at theprotection device outlet 22B as compared to a flame length ejected by an installation that do not comprisesuch protection device 22. - More precisely, the length of the processed
flame 54P at theprotection device outlet 22B is strictly inferior to the length of the flame generated at the pressure relief valve outlet in an installation that do not comprise theprotection device 22 according to the invention. - In particular, thanks to the
porous body 48 of thefirst stage 34, fuel of the combustible fuel is spread in the pores of theporous body 48. Then, the fuel of thecombustible fluid 26 is burned in each pore. The use of pores enable to reduce the flame length at thefirst stage exit 34B as compared to the flame length of the state of the art. - Indeed, the flame length depends on the diameter of the pores of the
porous body 48. The more the diameter of the pores decreases the more the flame length decreases. - A diameter of each pore of the
porous body 48 is comprised between 0.1 and 0.5 mm enables to obtain an acceptable flame length in terms of safety at theprotection device outlet 22B. In particular, theporous body 48 generates several small flames, for example of 10 to 20 mm, instead of one huge flame of 10 meters (m) for an installation that does not comprise theprotection device 22 according to the invention. - Moreover, the
second stage 36 enables to reduce the pressure and the velocity of the ejectedcombustion products 52E and the velocity of the ejectedflame 54E. - The
protection device 22 according to the invention thus enables to limit the occurrence of factors that can lead to dangerous situations during the release of pressurized fuel stored in tanks.
Claims (12)
- A protection device (22) configured to be in fluid communication with a combustible fluid (26), the protection device (22) comprising:- a first stage (34), the first stage (34) comprising a protection device inlet (22A), a burner (42) and at least one oxidizing fluid intake (40) in fluid communication with the burner (42), the burner (42) being configured to combust at least in part the combustible fluid (26) with an oxidizing fluid (46) and to eject combustion products (52E) and/or at least one flame (54E), and- a second stage (36), the second stage (36) comprising a protection device outlet (22B) and at least one Tesla valve (58), the Tesla valve (58) being configured to receive the ejected combustion products (52E) and/or the ejected flame (54E) and to process said ejected combustion products (52E) and/or said ejected flame (54E).
- The protection device according to claim 1, wherein the first stage (34) comprises a first stage exit (34B) and the second stage (36) comprises a second stage entry (36A), the first stage exit (34B) and the second stage entry (36A) being adjacent.
- The protection device according to claim 1 or 2, wherein the burner (42) comprises a porous body (48) comprising pores.
- The protection device according to claim 3, wherein the diameter of each pore of the porous body (48) is comprised between 0.1 and 0.5 millimeters.
- The protection device according to claims 3 or 4, wherein the porous body (48) is coated with a coating material, the coating material being a catalyzer.
- The protection device according to any one of the preceding claims, wherein the Tesla valve (58) defines at least one Tesla valve channel (64), the or each Tesla valve channel (64) having a tubular shape.
- The protection device according to any one of the preceding claims, wherein the Tesla valve (58) defines at least one Tesla valve channel (64), a shape of the Tesla valve channel (64) being such that the temperature (T3) of the processed combustion products (52P) is strictly inferior to the temperature (T3) of the ejected combustion products (52E) from the first stage (34) and/or the temperature (T3) of the processed flame (54P) is strictly inferior to the temperature (T2) of the ejected flame (54E) from the first stage (34).
- The protection device according to any one of the preceding claims, wherein the protection device (22) extends along an extension axis (A), a length of the burner (42) along the extension axis (A) being comprised between 300 millimeters and 1500 millimeters and a length of the Tesla valve (58) along the extension axis (A) being comprised between 300 and 1500 millimeters.
- The protection device according to any one of the preceding claims, wherein the protection device (22) extends along an extension axis (A), the first stage (34) and/or the second stage (36) each comprising a heat dissipation central hole (44, 60) extending along the extension axis (A).
- An installation (14) comprising:- at least one combustible fluid tank (18) storing combustible fluid (26), the combustible fluid tank (18) comprising a combustible fluid tank outlet (18B),- for the or each combustible fluid tank (18), at least one associated pressure relief device (20) in fluid communication with the combustible fluid (26) stored in this combustible fluid tank (18), and- a protection device (22) according to any one of the preceding claims,wherein the or each combustible fluid tank outlet (18B) is connected to the protection device inlet (22A) via the associated pressure relief device (20).
- The installation according to claim 10, wherein the combustible fluid (26) comprises dihydrogen.
- A vehicle (10), notably a railway vehicle (10), comprising an installation (14) according to claim 10 or 11.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21306621.0A EP4183453A1 (en) | 2021-11-22 | 2021-11-22 | Protection device, installation comprising the protection device and vehicle comprising said installation |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP21306621.0A EP4183453A1 (en) | 2021-11-22 | 2021-11-22 | Protection device, installation comprising the protection device and vehicle comprising said installation |
Publications (1)
Publication Number | Publication Date |
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EP4183453A1 true EP4183453A1 (en) | 2023-05-24 |
Family
ID=79165059
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP21306621.0A Pending EP4183453A1 (en) | 2021-11-22 | 2021-11-22 | Protection device, installation comprising the protection device and vehicle comprising said installation |
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EP (1) | EP4183453A1 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3896329A1 (en) * | 2020-04-15 | 2021-10-20 | ALSTOM Transport Technologies | Anti-fire safety system for a vehicle having hydrogen stored on board, and related vehicle |
CN214502119U (en) * | 2021-04-02 | 2021-10-26 | 神木市电石集团能源发展有限责任公司 | Cooling type direct exhaust flue |
-
2021
- 2021-11-22 EP EP21306621.0A patent/EP4183453A1/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3896329A1 (en) * | 2020-04-15 | 2021-10-20 | ALSTOM Transport Technologies | Anti-fire safety system for a vehicle having hydrogen stored on board, and related vehicle |
CN214502119U (en) * | 2021-04-02 | 2021-10-26 | 神木市电石集团能源发展有限责任公司 | Cooling type direct exhaust flue |
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