EP4067725A1 - Corps de base de vanne et vanne multifonction pour réservoirs d'hydrogène - Google Patents

Corps de base de vanne et vanne multifonction pour réservoirs d'hydrogène Download PDF

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Publication number
EP4067725A1
EP4067725A1 EP21166232.5A EP21166232A EP4067725A1 EP 4067725 A1 EP4067725 A1 EP 4067725A1 EP 21166232 A EP21166232 A EP 21166232A EP 4067725 A1 EP4067725 A1 EP 4067725A1
Authority
EP
European Patent Office
Prior art keywords
valve
line
sub
valve body
body according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP21166232.5A
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German (de)
English (en)
Inventor
Lars WÜSTE
Dennis Schulz
Björn RIXE
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Poppe and Potthoff GmbH
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Poppe and Potthoff GmbH
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Filing date
Publication date
Application filed by Poppe and Potthoff GmbH filed Critical Poppe and Potthoff GmbH
Priority to EP21166232.5A priority Critical patent/EP4067725A1/fr
Publication of EP4067725A1 publication Critical patent/EP4067725A1/fr
Withdrawn legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/04—Arrangement or mounting of 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
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/058—Size portable (<30 l)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/01—Mounting arrangements
    • F17C2205/0123—Mounting arrangements characterised by number of vessels
    • F17C2205/013—Two or more vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0329—Valves manually actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0335—Check-valves or non-return valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • F17C2205/0341—Filters
    • 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
    • F17C2205/035—Flow reducers
    • 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
    • F17C2205/0382—Constructional details of valves, regulators
    • F17C2205/0385—Constructional details of valves, regulators in blocks or units
    • 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
    • F17C2205/0388—Arrangement of valves, regulators, filters
    • F17C2205/0394—Arrangement of valves, regulators, filters in direct contact with the pressure vessel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2221/00—Handled fluid, in particular type of fluid
    • F17C2221/01—Pure fluids
    • F17C2221/012—Hydrogen
    • 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
    • F17C2223/0107—Single phase
    • F17C2223/0123—Single phase gaseous, e.g. CNG, GNC
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
    • F17C2223/03—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the pressure level
    • F17C2223/036—Very high pressure (>80 bar)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/043—Pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/04—Indicating or measuring of parameters as input values
    • F17C2250/0404—Parameters indicated or measured
    • F17C2250/0439—Temperature

Definitions

  • the invention relates to a base body for a valve for a hydrogen tank or a tank system, an associated manufacturing method and a multifunction valve for a hydrogen tank or a tank system, in particular for applications in vehicle technology.
  • molecular hydrogen (H2) is an ideal fuel for heat engines (e.g. gas turbines and internal combustion engines) and fuel cells.
  • the hydrogen is usually stored in high-pressure gas tanks at a gas pressure of approx. 30 MPa or approx. 70 MPa or more and via an extraction valve into which Application different functions can be integrated, directed to a fuel cell, an H2 combustion engine or an H2 gas turbine.
  • EP 1943 446 a valve having a main body including a tank port, a fill port, a filter in fluid communication with the fill port, a flow restriction valve downstream of the filter, and a plurality of sensor ports, each of the sensor ports receiving a pressure sensor and/or a temperature sensor.
  • This in EP 1943 446 valve described is thereby characterized in that it further comprises a manual flow valve downstream of the flow restriction valve, a pressure reducing regulator downstream of the manual flow valve, and a pressure relief valve downstream of the pressure reducing regulator.
  • EP 2 857 727 a fluid control valve assembly comprising a main valve body in which a bleed line is combined with a fill line inside the main valve body.
  • Other conventional valve types are from the EP 3 324 086 , the EP 3 077 713 and the U.S. 9,371,913 known.
  • valves for H2 tanks known from the prior art have a number of disadvantages.
  • One problem is, for example, that some of the known valve types are very heavy, take up a lot of space and/or are difficult to manufacture due to their complex structure and/or disadvantageous line routing in the valve body.
  • H 2 drive systems in which such valves are used are therefore often expensive and bulky, which can be problematic, particularly for the mass market of passenger cars.
  • valve types known from the prior art have inadequate filling properties, which can lead to a long refueling time and thus undesired downtimes of the respective vehicle.
  • valve types known from the prior art can be installed and removed only with great difficulty in the associated H 2 high-pressure tank, also because of their large space requirement, which makes the production and maintenance of H 2 drive systems more difficult.
  • the present invention is therefore based on the problem of at least partially reducing some of the disadvantages of the prior art described above.
  • the present invention provides a body for a valve for a container or a system for storing hydrogen, H2, gas at a pressure of at least 30 MPa, comprising: a gas extraction line and a gas filling line, the gas filling line having a first partial line and a second partial line and wherein the first partial line intersects the second partial line at an angle of at least 90°, preferably at an angle in the range of 95° to 105°, in an intersection area inside the base body and the intersection area is deburred and rounded .
  • the main body of the valve can be constructed in such a way that in continuous operation it withstands an internal gas pressure of at least 30 MPa, preferably at least 70 MPa, more preferably at least 105 MPa, even more preferably at least 200 MPa and most preferably at least 300 MPa .
  • the filling properties of the valve can be significantly improved by separating the filling and extraction lines and the selected properties of the filling line and in particular the intersection area, and at the same time the design of the base body can be simplified without reducing the filling rate.
  • filling rates of up to 300 g/s H2 gas at a pressure of 70 MPa can be achieved.
  • the intersection area can be deburred and rounded off by a deburring process that includes a thermal deburring step, preferably followed by an electrochemical deburring step.
  • intersection area can be manufactured in such a way that an edge of the intersection area has a rounding radius of at least 0.15 mm, preferably at least 0.2 mm, more preferably at least 0.3 mm and even more preferably at least 0.35 mm having.
  • the base body can have a valve head and a valve neck, with the valve head extending over the container when the valve is installed and the valve neck extending into the container.
  • the valve head can have a thickness of at most 50 mm, preferably at most 40 mm, and/or the maximum radius of the valve head can be less than 63 mm, preferably less than 55 mm and more preferably less than 52 mm.
  • H2 tanks can also be interconnected, e.g. via connecting pipes and an H2 distributor.
  • a common valve which is e.g. downstream of the H2 distributor in the withdrawal direction.
  • the valve neck does not extend into the container, but can be connected to the H2 distributor via a suitable interface (e.g. another H2 high-pressure pipe).
  • the valve neck can also be omitted and the valve connected directly to the H2 distributor, for example.
  • the maximum radius of the valve head is to be understood as the radius of that circle which the outer edge of the valve head describes when the valve - e.g. when screwed into the container - is rotated around its longitudinal axis. The smaller this radius, the less space the valve takes up when assembling or servicing the associated H2 propulsion system.
  • first partial line can be connected to a filling connection of the base body, which is arranged on a first side surface of the valve head and the second partial line extends in the valve neck. This arrangement can further reduce the space requirement and the component volume of the base body.
  • a receptacle or key surface for a key tool such as a wrench can be arranged on the top of the valve head, with which the valve is screwed into the container can be.
  • This receptacle or key face is preferably designed in such a way that the valve can also be screwed into the associated tank by machine, for example by a production robot in the mass production of H2 drive systems.
  • the shape of the valve head and in particular the shape and arrangement of one or more of the side surfaces of the valve head can be designed in such a way that the valve head can be gripped, moved and/or screwed in easily by conventional or specially made machine tools.
  • the diameter of the second partial line can be in the range from 3 mm to 8 mm, preferably in the range from 4 mm to 6 mm and more preferably in the range from 4.5 mm to 5.5 mm.
  • the first partial line can have a smaller cross section than the second partial line and/or the diameter of the first partial line can be in the range from 1 mm to 7 mm, preferably in the range from 3 mm to 5 mm and more preferably in the range from 3. 5mm to 4.5mm.
  • the length of the first partial line can be less than 25 mm, preferably less than 20 mm and more preferably less than 15 mm.
  • This configuration of the two sub-lines not only improves the filling properties of the valve, but also simplifies the manufacture of the base body and reduces the space required for the base body and the valve. For example, a smaller cross section or diameter of the first branch line compared to the second branch line prevents the effective diameter of the intersection from decreasing even with small production-related deviations in the intersection position and thus the filling rate is not influenced by the deviation.
  • the surface of the inside of the filling line prefferably has a surface roughness of no more than Rz 20, preferably no more than Rz 16, according to DIN EN ISO 1302 2002-06.
  • the second partial line can be connected to a connection for a pressure relief device, which is arranged on a second side surface of the valve head, the second side surface preferably being arranged essentially opposite the first side surface is.
  • a pressure relief device which is arranged on a second side surface of the valve head, the second side surface preferably being arranged essentially opposite the first side surface is.
  • an emergency vent line may intersect the port for the pressure relief device at an angle that is less than 90°, preferably less than 75°, and more preferably less than 60°.
  • the bleed line can comprise a third sub-line and a fourth sub-line, the third sub-line extending in the valve neck and the fourth sub-line extending in the valve head between two opposite bleed ports.
  • the third sub-line can be connected to the fourth sub-line via a connection for a manual shut-off valve and a further connection for a magnetic shut-off valve, both of which are also arranged on further outsides of the valve head.
  • the base body can also include a connection for a drain valve, the connection for the drain valve connecting the second partial line to the fourth partial line.
  • the container can also be drained in a controlled manner (e.g. in the event of an error or during routine maintenance) if the extraction line is blocked (e.g. due to a blocked shut-off valve or a clogged extraction filter).
  • the base body can essentially be made of an aluminum alloy, preferably made of 3.2315 EN. Furthermore, the surface of the base body can be coated with an EN 2536:1995-09 coating which has a thickness in the range from 20 to 50 ⁇ m, preferably from 25 to 40 ⁇ m. Such a coating increases the hardness of the base body and thus allows it To use parts of the base body as sealing surfaces for the functional valves of a multifunction valve.
  • the present invention further provides a multifunction valve for a tank or system for storing hydrogen, H2, gas at a pressure of at least 30 MPa, comprising a body as described above and one or more of the following components: a manual shut-off valve; a magnetic shut-off valve; a manual drain valve; a temperature sensor extending through the valve neck into the container when the valve is installed; a pressure sensor; a pressure relief device, preferably triggered thermally, or a flow limiter, preferably with an integrated filter.
  • the present invention also provides a method for producing a valve for a container or a system for storing hydrogen, H2, gas at a pressure of at least 30 MPa, comprising the following steps: producing a gas extraction line in a valve body; Forming a gas filling line in the valve body, by creating a first sub-line and a second sub-line in the valve body, so that the first sub-line meets the second sub-line at an angle of at least 90°, preferably at an angle in the range of 95° to 105° inside of the valve body intersects; and deburring and rounding of the intersection area, wherein the deburring preferably takes place thermally, preferably followed by electrochemical deburring and rounding of the intersection area.
  • the electrochemical deburring and rounding is carried out with the following process parameters: an electrical voltage greater than 10 volts and an electrical current greater than 5 amperes; a process duration of more than 5 seconds, preferably more than 8 seconds; and under the action of an electrolyte, preferably NaNO 3 , at a pressure of at least 1 bar.
  • the present invention further provides a hydrogen storage system that comprises at least two tanks for storing hydrogen, H2, gas at a pressure of at least 30 MPa, and a hydrogen distributor that connects the at least two tanks together and a multifunction valve as described above, the downstream of the hydrogen distributor in the removal direction.
  • FIG. 1 shows the results of a simulation of an (idealized) drilling intersection of a filling line of a conventional valve for a H2 high-pressure tank as is known from the prior art. Shown is the velocity field of the H 2 gas as it flows through the blend region, which has a blend angle of 90° and a sharp blend edge.
  • This configuration of the area of intersection leads to the creation of undesirable flow turbulence and thereby to a large pressure drop across the area of intersection, which significantly reduces the gas flow through the filling line.
  • the largest possible diameter of the partial lines, the largest possible intersection angle and the roundest possible intersection edge reduce the pressure drop across the intersection area.
  • this is in conflict with the goal of making the valve body as compact as possible, so that a CFD-based optimization of the filling line is advantageous.
  • FIG. 2 shows the results of such an exemplary CFD calculation with a system pressure of 70 MPa.
  • the parameters selected for the filling line in this example mean that the pressure drop caused by the intersection zone is less than 10% ( ⁇ 5 MPa). This pressure drop, which is very low compared to the prior art ( ⁇ 20 MPa), leads to a significant improvement in the gas flow and thus the filling rate of the valve.
  • FIG. 3 shows a side view of a valve body 300 of a multifunction valve according to an embodiment of the present invention.
  • the construction of the illustrated base body 300 and in particular the filling line 306, 308 illustrated by dashed lines is based at least partially on the knowledge gained from the CFD calculations (see Fig 1 and 2 ).
  • the base body 300 includes a valve head 302 and a valve neck 304. When installed, ie when the valve is screwed into a high-pressure H2 tank, for example, the valve head 302 is located above the tank and the valve neck 304 extends into the tank. Such valve configurations are therefore also called “ on tank valves" .
  • the valve head 310 comprises a number of side faces of different shapes and with different dimensions, on which a number of connections for different functional components of a multifunction valve can be attached (eg screwed in).
  • 305 is a filling connection via which the tank can be filled with H2 gas.
  • a check valve and/or a line connection can be screwed into the filling connection 305 .
  • a short first partial line 306 of the filling line extends diagonally downwards into the interior of the valve body 300 and intersects there in an intersection area (see FIG figure 5 , 7 and 8 ) a second partial line 308 of the filling line, which extends in the valve neck 304 to the lower end of the base body 300.
  • 310 is one of two extraction ports which are arranged on substantially opposite side faces of the main body 300 .
  • the use of two extraction connections has the advantage that several multifunction valves can be connected to form a tank system.
  • one of the extraction connections 310 can be closed with a blind plug.
  • 312 is a connection for a temperature sensor, which extends to the lower end of the valve neck 304 via a further line or bore (not shown) inside the base body.
  • 314 is a port for a drain valve. As described in Section 3 above, this port 314 connects the second branch line 308 of the filling line to a branch line of the bleed line (not shown) which is connected to the two bleed ports 310 .
  • connection 316 is a connection for a manual shut-off valve, with which the extraction line can be shut off in the extraction direction in front of a magnetic shut-off valve.
  • An externally controllable magnetic shut-off valve can be connected to connection 318 attached to shut off or release the sampling line in a controlled manner.
  • the connection area 320 for the manual shut-off valve is higher than the rest of the valve head 302 and thus forms an attachment point 320 for a key tool (e.g. a wrench) with which the valve can be screwed into an associated H2 tank in a simple and space-saving manner.
  • This increase defines the maximum thickness of the valve head 302, which can preferably be less than 50 mm, preferably less than 40 mm.
  • FIG 4 shows another side view of the valve body 300 of FIG 3 from a different point of view.
  • a second extraction port 310-2 which is connected to the first extraction port 310 via a partial line 404 of the extraction line.
  • the sampling line can be shut off and released using the manual shut-off valve described above and the solenoid valve screwed into connection 318.
  • connection 402 can be sealed with a blind plug.
  • FIG 5 shows another side view of the valve body 300 of FIG 3 and 4 from a different point of view.
  • a connection 502 for a preferably thermally triggered pressure relief device is connected to the second partial line 308 via a short piece of line 504 inside the valve head (see 3 and 6 tied together).
  • an emergency vent port 506 is connected to connection 502 for the pressure relief device via another short piece of line.
  • the piece of line for the emergency vent intersects the connection 502 at an angle which is less than 90°, preferably less than 75° and particularly preferably less than 60°. In this way, the required component volume for emergency venting can be kept as small as possible.
  • the dashed area 602 characterizes the intersection area of the filling line in which the first sub-line 306 and 308 intersect.
  • the two branch lines 306 and 308 intersect at an angle of more than 90° and preferably in a range of 95° and 105°. This angular range makes it possible to combine a filling line that is as short as possible and a design of the valve base body 300 that is as compact as possible with the lowest possible pressure drop in the intersection region 602 .
  • the diameters of the partial lines 306 and 308 are selected such that the cross section of the first partial line 306 is smaller than the diameter of the second partial line 308. As described above in section 3, this simplifies the manufacture of the filling line and reduces the likelihood that even minor manufacturing deviations lead to a narrowing of the effective cable cross-section in the intersection area.
  • the diameter of the second sub-line 308 is 5 mm and that of the first sub-line is 3.5 mm.
  • the advantages described above in section 3 can also be achieved with other diameters as described above.
  • intersection edge 604 is as follows 7 and 8 Deburred and rounded with a deburring process as described. This reduces the formation of flow turbulences in the area of intersection 602 and thus leads to a lower pressure drop across the filling line.
  • the inner surface of the filling line should be as smooth as possible and, for example, have a roughness of no more than Rz 20, preferably no more than Rz 16, in accordance with DIN EN ISO 1302 2002-06.
  • a deburring process as described in Section 3 above may be used.
  • an electrolyte preferably NaNO 3
  • An electrical current of at least 5 amperes with a voltage of more than 10 volts and a process duration of more than 5 seconds can be used for deburring.
  • the following process parameters were particularly advantageous: 12 volts, 7.5 amperes and a process duration of 10 seconds.
  • FIG. 12 shows an enlarged photograph of the intersection area 602 in a test base that was subjected to the deburring process described above.
  • the intersection edge 604 could even be rounded off with a radius of more than 0.35 mm (see 8 ), which significantly improves the flow properties in the intersection area 602 of the filling line.
  • FIG. 9 Figure 12 shows a comparison of tank velocity between a conventional valve (dashed line 902) and a valve according to the present invention (line 904).
  • a system pressure of 70 MPa and a tank volume of 140 l the tank with the valve according to the invention can be filled to a level of 90% almost twice as quickly as is possible with a conventional valve.
  • downtime when refueling can be significantly reduced, which is a decisive advantage of H2 drives compared to battery-powered vehicles.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP21166232.5A 2021-03-31 2021-03-31 Corps de base de vanne et vanne multifonction pour réservoirs d'hydrogène Withdrawn EP4067725A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21166232.5A EP4067725A1 (fr) 2021-03-31 2021-03-31 Corps de base de vanne et vanne multifonction pour réservoirs d'hydrogène

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EP21166232.5A EP4067725A1 (fr) 2021-03-31 2021-03-31 Corps de base de vanne et vanne multifonction pour réservoirs d'hydrogène

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EP4067725A1 true EP4067725A1 (fr) 2022-10-05

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022123005A1 (de) 2022-09-09 2024-03-14 Bayerische Motoren Werke Aktiengesellschaft Ventilbaugruppe, Druckbehältersystem, Kraftfahrzeug und Herstellverfahren für ein Druckbehältersystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2155179A (en) * 1938-03-11 1939-04-18 Bastian Blessing Co Buried gas system
AU605918B2 (en) * 1987-10-16 1991-01-24 Syntom Limited Improved liquid petroleum multi-valve assembly
US9371913B2 (en) 2012-12-26 2016-06-21 Sue H. Lhymn Valve apparatus for high pressure gas containers
GB2555514A (en) * 2016-07-29 2018-05-02 Luxfer Gas Cylinders Ltd Improved compressed fluid vessel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2155179A (en) * 1938-03-11 1939-04-18 Bastian Blessing Co Buried gas system
AU605918B2 (en) * 1987-10-16 1991-01-24 Syntom Limited Improved liquid petroleum multi-valve assembly
US9371913B2 (en) 2012-12-26 2016-06-21 Sue H. Lhymn Valve apparatus for high pressure gas containers
GB2555514A (en) * 2016-07-29 2018-05-02 Luxfer Gas Cylinders Ltd Improved compressed fluid vessel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022123005A1 (de) 2022-09-09 2024-03-14 Bayerische Motoren Werke Aktiengesellschaft Ventilbaugruppe, Druckbehältersystem, Kraftfahrzeug und Herstellverfahren für ein Druckbehältersystem

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