IT202100028586A1 - POWER UNIT TO SUPPLY HYDROGEN TO A HYDROGEN PROPULSION SYSTEM - Google Patents

POWER UNIT TO SUPPLY HYDROGEN TO A HYDROGEN PROPULSION SYSTEM Download PDF

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Publication number
IT202100028586A1
IT202100028586A1 IT102021000028586A IT202100028586A IT202100028586A1 IT 202100028586 A1 IT202100028586 A1 IT 202100028586A1 IT 102021000028586 A IT102021000028586 A IT 102021000028586A IT 202100028586 A IT202100028586 A IT 202100028586A IT 202100028586 A1 IT202100028586 A1 IT 202100028586A1
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IT
Italy
Prior art keywords
hydrogen
valve
supply unit
propulsion system
control valve
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Application number
IT102021000028586A
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Italian (it)
Inventor
Pierre Tirgari
Original Assignee
Bosch Gmbh Robert
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Application filed by Bosch Gmbh Robert filed Critical Bosch Gmbh Robert
Priority to IT102021000028586A priority Critical patent/IT202100028586A1/en
Priority to PCT/EP2022/078818 priority patent/WO2023083565A1/en
Publication of IT202100028586A1 publication Critical patent/IT202100028586A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C7/00—Methods or apparatus for discharging liquefied, solidified, or compressed gases from pressure vessels, not covered by another subclass
    • 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
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0326—Valves electrically actuated
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2205/00—Vessel construction, in particular mounting arrangements, attachments or identifications means
    • F17C2205/03—Fluid connections, filters, valves, closure means or other attachments
    • F17C2205/0302—Fittings, valves, filters, or components in connection with the gas storage device
    • F17C2205/0323—Valves
    • F17C2205/0332—Safety valves or pressure relief valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • 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
    • 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
    • F17C2250/03—Control means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0636—Flow or movement of content
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2265/00—Effects achieved by gas storage or gas handling
    • F17C2265/06—Fluid distribution
    • F17C2265/066—Fluid distribution for feeding engines for propulsion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0168—Applications for fluid transport or storage on the road by vehicles
    • F17C2270/0178—Cars
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2270/00—Applications
    • F17C2270/01—Applications for fluid transport or storage
    • F17C2270/0165—Applications for fluid transport or storage on the road
    • F17C2270/0184—Fuel cells

Description

DESCRIZIONE DESCRIPTION

del brevetto per invenzione industriale dal titolo: of the patent for industrial invention entitled:

?GRUPPO DI ALIMENTAZIONE PER ALIMENTARE IDROGENO AD UN SISTEMA DI PROPULSIONE AD IDROGENO? ?POWER SET TO SUPPLY HYDROGEN TO A HYDROGEN PROPULSION SYSTEM?

La presente invenzione ? relativa ad un gruppo di alimentazione per alimentare idrogeno ad un sistema di propulsione ad idrogeno. This invention? relating to a power supply unit for supplying hydrogen to a hydrogen propulsion system.

In particolare, la presente invenzione ? relativa ad un gruppo di alimentazione del tipo comprendente un serbatoio per lo stoccaggio di idrogeno; un circuito idraulico per collegare fra loro il serbatoio ed un sistema di propulsione ad idrogeno; ed un dispositivo valvolare montato lungo il circuito idraulico per controllare l?alimentazione di idrogeno dal serbatoio al sistema di propulsione stesso. In particular, the present invention is relating to a power supply unit of the type comprising a tank for the storage of hydrogen; a hydraulic circuit to connect the tank and a hydrogen propulsion system; and a valve device mounted along the hydraulic circuit to control the supply of hydrogen from the tank to the propulsion system itself.

I dispositivi valvolari utilizzati nei gruppi di alimentazione noti sopra descritti sono generalmente di due tipi. The valve devices used in the known power supplies described above are generally of two types.

Secondo una prima tipologia, il dispositivo valvolare comprende una valvola di controllo, nella fattispecie una elettrovalvola di dosaggio, che ? mobile tra una posizione di chiusura ed una pluralit? di posizioni di apertura, deve essere configurata e dimensionata per alimentare al sistema di propulsione portate di idrogeno comprese tra un valore di soglia minimo relativamente ridotto ed un valore di soglia massimo relativamente elevato, ed ?, quindi, relativamente complessa e costosa. According to a first typology, the valve device includes a control valve, in this case a dosing solenoid valve, which is mobile between a closed position and a plurality? of opening positions, must be configured and sized to supply the propulsion system with hydrogen flow rates between a relatively low minimum threshold value and a relatively high maximum threshold value, and is, therefore, relatively complex and expensive.

Secondo l?altra delle due tipologie note sopra menzionate, il dispositivo valvolare comprende due valvole di controllo, nella fattispecie due elettrovalvole di dosaggio, ciascuna delle quali mobile tra una posizione di chiusura ed una pluralit? di posizioni di apertura. In questo caso, il dispositivo valvolare ? relativamente complesso e costoso per la presenza delle due elettrovalvole di dosaggio e comporta una fase di regolazione e settaggio relativamente complessa e costosa. According to the other of the two known typologies mentioned above, the valve device includes two control valves, in this case two dosing solenoid valves, each of which is movable between a closed position and a plurality of of opening positions. In this case, the valve device is relatively complex and expensive due to the presence of the two dosing solenoid valves and involves a relatively complex and expensive adjustment and setting phase.

Scopo della presente invenzione ? di realizzare un gruppo di alimentazione per alimentare idrogeno ad un sistema di propulsione ad idrogeno che sia esente dagli inconvenienti sopra descritti e che sia di semplice ed economica attuazione. Purpose of the present invention? to create a power supply unit for supplying hydrogen to a hydrogen propulsion system which is free from the drawbacks described above and which is simple and economical to implement.

Secondo la presente invenzione viene realizzato un gruppo di alimentazione per alimentare idrogeno ad un sistema di propulsione ad idrogeno come rivendicato nelle rivendicazioni allegate. According to the present invention, a power supply unit is created to supply hydrogen to a hydrogen propulsion system as claimed in the attached claims.

La presente invenzione verr? ora descritta con riferimento alla figura annessa, che ne illustra schematicamente un esempio di attuazione non limitativo. Will this invention come? now described with reference to the attached figure, which schematically illustrates a non-limiting example of implementation.

Con riferimento alla figura allegata, con 1 ? indicato, nel suo complesso, un gruppo di alimentazione per alimentare idrogeno ad un sistema di propulsione 2 ad idrogeno come, per esempio, un motore a combustione interna di idrogeno oppure una cella a combustione di idrogeno per l?alimentazione di un motore elettrico. With reference to the attached figure, with 1? indicated, as a whole, is a power supply unit for supplying hydrogen to a hydrogen propulsion system 2 such as, for example, a hydrogen internal combustion engine or a hydrogen combustion cell for supplying an electric motor.

Il gruppo di alimentazione 1 comprende un serbatoio 3 per lo stoccaggio di idrogeno, un circuito 4 idraulico per collegare fra loro il serbatoio 3 ed il sistema di propulsione 2, ed un dispositivo 5 valvolare montato lungo il circuito 4 per controllare l?alimentazione dell?idrogeno dal serbatoio 3 al sistema di propulsione 2 stesso. The power supply unit 1 includes a tank 3 for storing hydrogen, a hydraulic circuit 4 to connect the tank 3 and the propulsion system 2 together, and a valve device 5 mounted along the circuit 4 to control the supply of the fuel. hydrogen from tank 3 to the propulsion system 2 itself.

Il dispositivo 5 comprende due valvole 6, 7 di controllo, nella fattispecie due elettrovalvole, montate in parallelo fra loro, e di cui la valvola 6 ? una valvola onoff mobile tra una posizione di chiusura ed un?unica posizione di apertura e la valvola 7 ? una valvola proporzionale mobile tra una posizione di chiusura ed almeno due posizioni di apertura, in particolare una pluralit? di posizioni di apertura. The device 5 includes two control valves 6, 7, in this case two solenoid valves, mounted in parallel with each other, and of which the valve 6 is a mobile on-off valve between a closed position and a single open position and the valve 7? a proportional valve movable between a closed position and at least two open positions, in particular a plurality? of opening positions.

Il dispositivo 5 comprende, inoltre, una valvola 8 di sicurezza, nella fattispecie una elettrovalvola, montata lungo il circuito 4 tra il serbatoio 3 e le valvole 6, 7. The device 5 also includes a safety valve 8, in this case a solenoid valve, mounted along the circuit 4 between the tank 3 and the valves 6, 7.

La valvola 8 ? disposta, normalmente, in una posizione di apertura, ed ? mobile in una posizione di chiusura in caso di mancata alimentazione elettrica della valvola 8 stessa. Valve 8? arranged, normally, in an open position, and is mobile in a closed position in the event of a lack of electrical power to the valve 8 itself.

Il gruppo di alimentazione 1 comprende, inoltre, una unit? 9 elettronica di controllo configurata per spostare: la valvola 6 nella sua posizione di apertura e la valvola 7 nella sua posizione di chiusura quando la portata di idrogeno richiesta dal sistema di propulsione 2 ? sostanzialmente pari ad un valore di soglia; The power supply unit 1 also includes a unit 9 control electronics configured to move: valve 6 to its open position and valve 7 to its closed position when the hydrogen flow rate required by the propulsion system 2? substantially equal to a threshold value;

la valvola 6 nella sua posizione di chiusura e la valvola 7 in una delle sue posizioni di apertura quando la portata di idrogeno richiesta dal sistema di propulsione 2 ? minore del citato valore di soglia; o valve 6 in its closed position and valve 7 in one of its open positions when the hydrogen flow rate required by the propulsion system 2 is ? lower than the aforementioned threshold value; or

la valvola 6 nella sua posizione di apertura e la valvola 7 in una delle sue posizioni di apertura quando la portata di idrogeno richiesta dal sistema di propulsione 2 ? maggiore del citato valore di soglia. the valve 6 in its open position and the valve 7 in one of its open positions when the hydrogen flow rate required by the propulsion system 2 is ? greater than the aforementioned threshold value.

Il gruppo di alimentazione 1 presenta alcuni vantaggi principalmente discendenti dal fatto che l?assieme delle valvole 6 e 7 ? relativamente semplice ed economico e consente alla valvola 6 di garantire una portata di idrogeno costante ed alla valvola 7 di garantire portate di idrogeno minori o maggiori della portata garantita dalla valvola 6 stessa. The power supply unit 1 presents some advantages mainly resulting from the fact that the assembly of valves 6 and 7 is relatively simple and economical and allows valve 6 to guarantee a constant hydrogen flow rate and valve 7 to guarantee hydrogen flow rates that are lower or greater than the flow rate guaranteed by the valve 6 itself.

Claims (9)

RIVENDICAZIONI 1.- Gruppo di alimentazione per alimentare idrogeno ad un sistema di propulsione (2) ad idrogeno, il gruppo di alimentazione comprendendo un serbatoio (3) per lo stoccaggio di idrogeno; un circuito idraulico (4) per collegare fra loro il serbatoio (3) ed il sistema di propulsione (2); ed un dispositivo valvolare (5) montato lungo il circuito idraulico (4) per controllare l?alimentazione di idrogeno dal serbatoio (3) al sistema di propulsione (2) stesso; ed essendo caratterizzato dal fatto che il dispositivo valvolare (5) comprende una prima valvola di controllo (6) mobile tra una posizione di chiusura ed una sola posizione di apertura ed una seconda valvola di controllo (7) mobile tra una posizione di chiusura ed almeno due posizioni di apertura; le dette prima e seconda valvola di controllo (6, 7) essendo montate in parallelo fra loro lungo il circuito idraulico (4).1.- Power supply unit for supplying hydrogen to a hydrogen propulsion system (2), the power supply unit comprising a tank (3) for hydrogen storage; a hydraulic circuit (4) to connect the tank (3) and the propulsion system (2) together; and a valve device (5) mounted along the hydraulic circuit (4) to control the supply of hydrogen from the tank (3) to the propulsion system (2) itself; and being characterized in that the valve device (5) includes a first control valve (6) movable between a closing position and a single opening position and a second control valve (7) movable between a closing position and at least two opening positions; the said first and second control valves (6, 7) being mounted in parallel with each other along the hydraulic circuit (4). 2.- Gruppo di alimentazione secondo la rivendicazione 1, in cui ciascuna detta prima e seconda valvola di controllo (6, 7) ? una elettrovalvola.2.- Supply unit according to claim 1, wherein each said first and second control valve (6, 7)? a solenoid valve. 3.- Gruppo di alimentazione secondo la rivendicazione 1 o 2, in cui il dispositivo valvolare (5) comprende, inoltre, una valvola di sicurezza (8) montata lungo il circuito idraulico (4) tra il serbatoio (3) e le dette prima e seconda valvola di controllo (6, 7). 3.- Supply unit according to claim 1 or 2, in which the valve device (5) also includes a safety valve (8) mounted along the hydraulic circuit (4) between the tank (3) and the said first and second control valve (6, 7). 4.- Gruppo di alimentazione secondo la rivendicazione 3, in cui la valvola di sicurezza (8) ? una elettrovalvola.4.- Supply unit according to claim 3, in which the safety valve (8) is a solenoid valve. 5.- Gruppo di alimentazione secondo la rivendicazione 3 o 4, in cui la valvola di sicurezza (8) ? disposta, normalmente, in una posizione di apertura, ed ? mobile in una posizione di chiusura in caso di mancata alimentazione elettrica della valvola di sicurezza (8) stessa.5.- Supply unit according to claim 3 or 4, in which the safety valve (8) is arranged, normally, in an open position, and is mobile in a closed position in the event of a power failure of the safety valve (8) itself. 6.- Gruppo di alimentazione secondo una qualsiasi delle precedenti rivendicazioni, in cui la seconda valvola di controllo (7) ? mobile tra la sua posizione di chiusura ed una pluralit? di posizioni di apertura.6.- Supply unit according to any of the previous claims, in which the second control valve (7) is mobile between its closed position and a plurality? of opening positions. 7.- Gruppo di alimentazione secondo una qualsiasi delle precedenti rivendicazioni e comprendente, inoltre, una unit? elettronica di controllo (9) configurata per spostare la prima valvola di controllo (6) nella sua posizione di apertura e la seconda valvola di controllo (7) nella sua posizione di chiusura quando la portata di idrogeno richiesta dal sistema di propulsione (2) ? sostanzialmente pari ad un valore di soglia.7.- Power supply unit according to any of the previous claims and also comprising a unit? control electronics (9) configured to move the first control valve (6) to its open position and the second control valve (7) to its closed position when the hydrogen flow rate required by the propulsion system (2) ? substantially equal to a threshold value. 8.- Gruppo di alimentazione secondo la rivendicazione 7, in cui l?unit? elettronica di controllo (9) ? configurata per spostare la prima valvola di controllo (6) nella sua posizione di chiusura e la seconda valvola di controllo (7) in una delle sue posizioni di apertura quando la portata di idrogeno richiesta dal sistema di propulsione (2) ? minore del detto valore di soglia.8.- Power supply unit according to claim 7, in which the unit? control electronics (9) ? configured to move the first control valve (6) to its closed position and the second control valve (7) to one of its open positions when the flow rate of hydrogen required by the propulsion system (2) is ? less than the said threshold value. 9.- Gruppo di alimentazione secondo la rivendicazione 7 o 8, in cui l?unit? elettronica di controllo (9) ? configurata per spostare la prima valvola di controllo (6) nella sua posizione di apertura e la seconda valvola di controllo (7) in una delle sue posizioni di apertura quando la portata di idrogeno richiesta dal sistema di propulsione (2) ? maggiore del detto valore di soglia. 9.- Power supply unit according to claim 7 or 8, in which the unit? control electronics (9) ? configured to move the first control valve (6) to its open position and the second control valve (7) to one of its open positions when the flow rate of hydrogen required by the propulsion system (2) is ? greater than the said threshold value.
IT102021000028586A 2021-11-10 2021-11-10 POWER UNIT TO SUPPLY HYDROGEN TO A HYDROGEN PROPULSION SYSTEM IT202100028586A1 (en)

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IT102021000028586A IT202100028586A1 (en) 2021-11-10 2021-11-10 POWER UNIT TO SUPPLY HYDROGEN TO A HYDROGEN PROPULSION SYSTEM
PCT/EP2022/078818 WO2023083565A1 (en) 2021-11-10 2022-10-17 Feed unit for feeding hydrogen to a hydrogen propulsion system

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