PLANT AND METHOD FOR DISTRIBUTING LIQUID HYDROGEN

Description

[0001] The invention relates to an installation and a method for distributing liquefied hydrogen.

[0002] FR3088415A1 discloses such an installation.

[0003] The invention relates more particularly to a liquefied hydrogen distribution installation comprising a gaseous hydrogen source, a liquefier, at least one liquid hydrogen storage, the liquefier comprising an inlet connected to the source and an outlet connected to an inlet of the storage via a liquid circuit for storing liquefied hydrogen produced by the liquefier, the installation comprising a liquid filling circuit having a first end connected to the storage and a second end intended to be removably connected to a first end of a mobile liquid tank to be filled such as a semi-trailer, the installation further comprising a gas recovery circuit having a first end intended to be removably connected to a second end of said tank and a second end connected to a receiving element of the installation, in particular an inlet of the liquefier,the gas recovery circuit including a pressure and / or flow control device, such as a valve allowing the pressure in the mobile liquid tank to be reduced to a predetermined filling pressure, the installation including an electronic control device comprising a microprocessor configured to control all or part of the installation, the electronic control device being configured to receive at least one signal requesting the filling of a mobile liquid tank.

[0004] A hydrogen liquefier is typically configured to operate at its rated load and produce liquid hydrogen at a specific temperature. The liquid hydrogen produced is stored in one or more storage tanks, from which mobile tanks (semi-trailers) are filled.

[0005] The liquefier storage and the associated loading procedure for filling trailers from the storage are also designed to operate under fixed conditions. In fact, all these parameters are generally optimized during the design phase. Then, during the operational phase, these parameters remain the same, regardless of the trailer being filled and the customers being delivered to.

[0006] However, generally several customers (receiving points) need to be supplied with liquid hydrogen from this facility, with different logistics and different expectations (hydrogen more or less dense or cold).

[0007] To achieve this, the nominal production point of liquefied hydrogen is set at the level necessary to satisfy the most demanding customer. As a result, the plant wastes some of its energy producing "over-quality" hydrogen for certain users.

[0008] One aim of the present invention is to overcome all or part of the disadvantages of the prior art noted above.

[0009] To this end, the installation according to the invention, which also conforms to the generic definition given in the preamble above, is essentially characterized in that the pressure and / or flow regulation device is adjustable and in that the electronic control device is configured to control the latter to regulate the pressure level in a mobile liquid tank to a filling pressure determined according to a received filling request signal.

[0010] The invention makes it possible to fill tanks at the optimal pressure, meeting customer delivery expectations, without excessive production of vaporization gas during filling.

[0011] Conversely, according to known solutions, excessively low pressure was imposed in the mobile tank for certain deliveries. This represents an unrecovered and costly energy expenditure for the installation. Indeed, this generates more flash gas than at a higher pressure. This flash gas, generated during the filling of a tank at relatively low pressure, is not transported. This gas is either vented to the atmosphere or reliquefied in the liquefier. On the other hand, if the tank departs with too low a pressure, additional liquid will be evaporated to pressurize it at the stations (increasing gas boil-off).

[0012] Furthermore, embodiments of the invention may include one or more of the following characteristics: The gas recovery circuit includes a compression element disposed between the pressure and / or flow control element and the second end connected to the liquefier. The compression element is configured to compress the gas flow from the first end to a predetermined pressure for reinjection into the liquefier circuit. The predetermined filling pressure is chosen between a predetermined minimum pressure and a predetermined maximum pressure. The predetermined minimum pressure (Pmini) is equal to 1.05 bar. The compression element is configured to operate with a minimum inlet pressure at the inlet of said compression element. The predetermined minimum pressure (Pmini) is equal to the minimum inlet pressure of the compression element plus a predetermined value corresponding at least to the pressure drop in the gas recovery circuit between the first end and the inlet of said compression element.The maximum pressure determined is equal to the pressure value within the storage tank, possibly reduced by the pressure drop between the storage tank and the second end of the liquid filling circuit. The electronic control unit is configured to receive at least one filling request signal from a mobile liquid tank, including at least one of the following filling parameters: maximum permissible pressure level in the tank, fluid pressure level required at the receiving point(s) that the tank must deliver as liquefied hydrogen after filling, quantity of liquefied hydrogen to be filled into the tank, distance that the tank must travel after filling to deliver liquefied hydrogen to the receiving point(s), number of receiving points that the tank must deliver as liquefied hydrogen after filling, and the temperature in the storage tank.the volume of the tank; the electronic control unit being configured to calculate the filling pressure level determined according to said parameter(s), the liquefier is of the variable cooling power type, i.e. allowing the temperature of the liquid hydrogen produced to be varied and in particular to produce liquid hydrogen that is subcooled relative to its saturated state, the electronic control unit is configured to control the temperature level of the liquid hydrogen produced in the storage according to the demand signal received, the liquid filling circuit includes two withdrawal lines connected to two distinct heights of the storage to withdraw hydrogen at distinct respective thermodynamic conditions, the installation comprises two separate storage tanks filled to different liquid hydrogen temperatures,The first end of the liquid filling circuit is connected to the storage tanks; the liquid filling circuit includes a set of valve(s) configured to allow a tank to be filled with a mixture of liquid from the storage tanks to obtain a predetermined liquid temperature.

[0013] The invention also relates to a method of distributing liquefied hydrogen using an installation conforming to any one of the above or below characteristics, comprising a step of generating a signal requesting the filling of a mobile liquid tank, a step of calculating a specific filling pressure level based on said signal, and a step of filling the tank with liquid hydrogen to the specific filling pressure level.

[0014] Depending on other possible characteristics: The determined filling pressure level is regulated during the filling stage by controlling the opening of the pressure and / or flow control device. The control of the opening of the pressure and / or flow control device is carried out during a tank degassing operation during and / or before and / or after a transfer of liquid hydrogen into the tank. The step of generating a filling request signal is carried out manually and / or by telemetry, said signal being transmitted to the installation. The process includes, prior to a transfer of liquid hydrogen into the tank from the storage, a step of calculating a determined temperature value for the liquefied hydrogen produced in the storage based on said signal, and a step of filling the storage with liquefied hydrogen at said determined temperature. The process includes,Prior to transferring liquid hydrogen from storage into the tank, the process involves a step of filling two separate storage tanks with liquefied hydrogen at different temperatures, a step of calculating a specific liquefied hydrogen temperature based on said signal, and a step of filling a tank to said temperature using a mixture of liquefied hydrogen from said storage tanks.

[0015] The invention may also relate to any alternative device or method comprising any combination of the above or below features within the scope of the claims.

[0016] Other features and advantages will become apparent upon reading the description below, which refers to the figures in which: [ Fig.1 ] represents a schematic and partial view illustrating an example of the structure and operation of an example embodiment of a liquefied hydrogen distribution installation according to the invention, [ Fig.2 ] represents a detail of such an installation in a first embodiment variant with temperature control of the liquid hydrogen produced and stored, [ Fig.3 ] represents a detail of such an installation in a second embodiment with liquid withdrawal at different levels of the storage, [ Fig.4 ] represents a detail of such an installation in a third variant embodiment with several storage units.

[0017] Liquefied hydrogen distribution installation 1 shown in the [ Fig.1 ] includes a source 2 of gaseous hydrogen, a liquefier 3 and at least one storage 4 of liquid hydrogen.

[0018] Source 2 may include a hydrogen supply network and / or hydrogen production equipment such as an electrolyzer, for example.

[0019] Liquefactor 3 is for example a liquefactor using a cycle gas (including for example hydrogen and / or helium) which undergoes a thermodynamic cycle producing at one end of the cycle cold which is put in heat exchange with a flow of hydrogen to be cooled in order to liquefy it.

[0020] Liquefier 3 therefore includes an inlet connected to source 2 and an outlet connected to an inlet of storage 4 via a liquid circuit 5 to store liquefied hydrogen produced by liquefier 3.

[0021] Installation 1 further includes a liquid filling circuit 12 having a first end connected to the bottom of storage 4 and a second end intended to be removably connected to a first end of a mobile liquid tank 6 to be filled such as a semi-trailer to transfer liquid hydrogen.

[0022] Installation 1 further includes a gas recovery circuit 7 (vaporization gas contained in the tanks 6 to be filled) having a first end intended to be removably connected to a second end of said storage 4 (typically the upper end) and a second end connected to a receiving element of installation 1.

[0023] The gas recovery circuit 7 includes a pressure and / or flow control device 8, such as a valve that reduces the pressure in the mobile liquid reservoir 6 to a predetermined filling pressure Pr. This pressure and / or flow control device 8 is adjustable, meaning that it allows the residual pressure level in the reservoir 6 to be set (controlled degassing).

[0024] For example, the second end is connected to an inlet of liquefier 3 to recover gaseous hydrogen in the liquefier circuit to be liquefied.

[0025] For this purpose, the gas recovery circuit 7 preferably includes a compression device 11, such as a compressor (or compression unit), positioned between the pressure and / or flow control device 8. Thus, the compressor 11 can be configured to compress the gas flow from the first end to a predetermined pressure for reinjection, for example, into the hydrogen liquefaction circuit of the liquefier 3.

[0026] As illustrated, downstream of compressor 11, the recovered vaporization gas stream can be allowed to circulate, for example, through a passage in a set of cooling exchangers for the liquefier 3, separate from the main hydrogen liquefaction circuit 5 supplied by the source. In other words, the vaporization gas stream can be liquefied independently of the main hydrogen flow. This recovered and cooled vaporization gas can be conveyed from the outlet of liquefier 3 in a pipe 17 (optionally equipped with a valve 27), which can then be connected to the liquid circuit 5 (at the outlet of the liquefier, for example, in or just before the inlet to storage 4). As illustrated, this cooled (and where appropriate at least partially liquefied) gas can be mixed with the liquid hydrogen from the liquid circuit 5, for example downstream of a final expansion device 15 (for example a turbine and / or a valve) of the liquid circuit 5.

[0027] As also illustrated, an upper end of the storage 4 can be connected to the inlet of the compressor 11 via a line 14 preferably equipped with a valve 24. This allows, where appropriate, the vaporization gas from the storage 4 to be recovered in the compressor for recycling and liquefaction.

[0028] Installation 1 may include a set of valve(s) and appropriate components not shown for the sake of simplicity.

[0029] Installation 1 includes an electronic control unit 10 comprising a microprocessor (for example a computer or a programmable electronic calculator) configured to control all or part of installation 1. This control unit 10 may be housed in installation 1 and / or remote and composed of one or more electronic units.

[0030] This electronic control unit 10 is configured to receive at least one signal 13 requesting the filling of a mobile liquid tank 6.

[0031] The electronic control unit 10 is configured to drive the pressure and / or flow control unit 8 to regulate the pressure level in a mobile liquid tank 6 filled to a filling pressure Pr determined according to the received demand signal 13. This allows the pressure of the tank 6 being filled to be adjusted to the optimal pressure, taking into account the needs and constraints of the mobile tank 6, particularly with regard to its subsequent deliveries. The filling pressure Pr can thus be calculated to correspond to the optimal thermodynamic state so as not to exceed the limit specified by the customers who will receive liquefied gas from tank 6.

[0032] This determined filling pressure Pr is chosen between a determined minimum pressure Pmini and a determined maximum pressure Pmax.

[0033] This minimum pressure Pmini determined is for example equal to a fixed value determined, for example 1.05 bar in particular in the case where part of the vaporization gas (BOG) can be ventilated from tank 6 (additional depressurization before leaving the filled tank 6).

[0034] In the case where there is complete recovery of this vaporization gas from tank 6 at the level of installation 1, this minimum pressure Pmini can be equal to the minimum inlet pressure of the compression unit 11 plus the pressure loss to be overcome by the return of this vaporization gas between tank 6 and the inlet of the compression unit 11.

[0035] The maximum pressure determined Pmax is equal to the pressure value within storage 4, possibly reduced by the pressure drop between storage 4 and the second end of the liquid filling circuit 12. That is to say, this maximum pressure determined Pmax can be specified as the pressure of storage 4 in installation 1 minus the pressure drop between storage 4 and tank 6 (trailer) if a transfer pump is not available to transfer the liquid in the liquid filling circuit.

[0036] This maximum pressure determined Pmax can be specified by the pressure of the storage 4 of the installation if, on the contrary, a transfer pump is available in the liquid filling circuit.

[0037] The electronic control unit 10 is therefore configured to receive at least one signal 13 requesting the filling of a mobile liquid reservoir 6 which specifies at least one filling parameter.

[0038] This signal 13 may include, for example, at least one of the following filling parameters: maximum pressure level allowed in the tank 6, fluid pressure level required at the receiving point(s) that the tank 6 will have to deliver in liquefied hydrogen after filling, quantity of liquefied hydrogen to be filled in the tank 6, distance that the tank 6 will have to travel after filling to deliver in turn liquefied hydrogen to the receiving point(s), number of receiving points that the tank 6 will have to deliver in liquefied hydrogen after filling, volume of the tank 6.

[0039] The electronic control unit 10 is configured to calculate the optimal determined filling pressure level Pr as a function of the parameter(s).

[0040] That is to say, installation 1 optimizes and adapts the filling pressure of the mobile tank 6 according to the key logistical parameter(s) planned for the next delivery, for example the distances and the expectations of the customers who will have to be delivered in liquid hydrogen.

[0041] This optimal thermodynamic filling state can be determined automatically by a programmed tool.

[0042] For example, a customer (delivery point) can set a filling temperature limit to ensure they only purchase cold hydrogen at a specific temperature. As the saturated pressure (and therefore temperature) inside the mobile tank 6 increases with distance traveled (linearly for a specified tank 6 liquid level), the customer can specify the maximum acceptable delivery temperature to their receiving station.

[0043] Installation 1 can also receive information on the number of stations delivered (the rate of increase in pressure increases with the number of stations delivered and the decrease in the level of liquid in the mobile delivery tank 6).

[0044] The electronic control unit 10 is configured to calculate the optimal thermodynamic filling point (pressure between Pmin and Pmax) so as not to exceed the limit specified by the customer(s).

[0045] The transmission of this information or parameters can be done manually and / or via a telemetry-type shipping transmission system. For example, logistics and tank (trailer) data is transmitted to the electronic control unit 10, which then calculates the optimal filling pressure Pr.

[0046] Alternatively, the optimal filling pressure of tank 6 is transmitted through tank 6, for example at the loading dock, for example via the operator in charge of filling tank 6.

[0047] Several types of filling are possible to reach this calculated optimal thermodynamic filling point.

[0048] For example, the electronic control unit 10 can calculate the ideal filling pressure for tank 6, taking into account the next scheduled fluid delivery. The optimal pressure value is preferably the maximum value that must meet customer demand and road traffic regulations. Choosing the maximum possible pressure instead of a lower default value (often 1.15 bar) limits the amount of vapor gas produced during the filling of tank 6. Furthermore, this facilitates the recycling of vapor gases (requiring less depressurization).

[0049] The filling pressure of the tank 6 can thus be regulated by opening the pressure and / or flow regulating device 8 (degree of opening and / or durations of opening) to lower the pressure in the tank 6 to be filled connected to the installation 1.

[0050] In the case where the installation 1 includes several filling lines allowing the simultaneous filling of several mobile tanks 6, each of the components 8 (valves for example) is preferably individually controllable.

[0051] For example, this valve (or these valves) 8 can be pilot-operated and / or automatic with a variable setpoint. Thus, the pressure setpoint of this component 8 can be controlled, for example, via a PIC-type valve control 18 (pressure-independent automatic regulating and balancing valve). Of course, any other suitable valve and control type can be considered.

[0052] This controlled depressurization step of tank 6 is preferably carried out before the liquid filling step and is performed until the ideal pressure is reached, as explained above. This avoids venting to the atmosphere and facilitates the recycling of vaporization gases into installation 1. Furthermore, the depressurization step is shorter compared to the prior art.

[0053] Depending on the planned filling frequency of the tanks 6, the logistics and the number of loading docks, the installation 1 may include one or more gas recovery circuits 7 (thermally insulated return lines) to the liquefier 3.

[0054] For example, for relatively small liquefiers 3, a single tank 6 could be depressurized / filled at a time, and a single gas return line 7 might be sufficient. Conversely, separate gas return lines 7 could be considered if multiple tank 6 fillings are possible (potentially at different thermodynamically optimal filling points).

[0055] The setpoint for filling tank 6 will therefore influence the pressure setpoint of the associated return line 7. Several return lines can benefit from the same thermal insulation.

[0056] In the event that the expected delivery conditions are homogeneous for a relatively long period (for example several days and in particular more than 15 days), the installation 1 can be configured to modify the pressure determined in the storage 4 receiving liquid from the liquefier 3. This also allows, if necessary, the installation 1 to be adapted to the optimal pressure for filling the tank 6.

[0057] If a filling pump is available in the liquid filling circuit 12, this target pressure of storage 4 is preferably equal to the filling pressure of tank 6.

[0058] If tank 6 is filled without a pump, a sufficient pressure difference between storage 4 and tank 6 is maintained to overcome the pressure drop in the filling circuit 12 piping and maintain the desired liquid filling flow rate. This pressure difference can be between 100 mbar and 500 mbar, and more preferably between 200 mbar and 300 mbar (for example, depending on the length and diameter of the circuit 12 piping).

[0059] Preferably, the evaporation management system should be flexible in order to take advantage of a higher boiling pressure.

[0060] Thus, although simple and inexpensive in structure, the invention optimizes the entire chain from the liquefier 3 to the receiving station, which receives liquefied gas from the mobile tank 6. The invention allows the filling of the tanks 6 (trailers) to be adapted to optimal thermodynamic conditions, in order to meet the needs of the end customer(s) receiving the liquid while minimizing the cost of the installation 1 (in particular by avoiding unnecessary liquefaction and cooling power).

[0061] The installation and process allow for the filling of 6 cryogenic liquid delivery tanks for an optimal supply chain (including minimizing vaporization gas during tank 6 filling).

[0062] Furthermore, as described above, the thermodynamic conditions (e.g. pressure and / or temperature) in storage 4 can be regulated taking into account subsequent deliveries.

[0063] As schematically illustrated in the [ Fig.2 ], in the case of a liquefier 3 of the type capable of producing subcooled and flexible liquefied hydrogen, it is possible to control the installation 1 in addition by modifying the temperature Tl of the liquid produced according to the aforementioned parameter(s).

[0064] For example, in the case where the installation 1 includes a single storage 4 available, for a given filling pressure of the tank 6 (for example between 1.15 bara and 2 bara, and preferably between 1.15 and 1.5 bara), the temperature of the liquefied hydrogen will have an impact on the resulting pressure when the tank 6 is moved.

[0065] Indeed, a tank 6 filled with subcooled liquid hydrogen will reach equilibrium during its movement, and the pressure will drop to the saturation pressure. The optimal temperature of the liquid hydrogen entering tank 6 can also be determined by the programmed electronic control unit 10. The temperature of the produced liquefied hydrogen (subcooled or not) can be adjusted, also taking into account the parameters of the filling demand (next delivery(s)), and injected into the bottom of the storage tank 6. In fact, the subcooled hydrogen will be stored at the bottom of the storage tank 6 thanks to the stratification of the hydrogen within it.

[0066] Thus, for example, if customers require relatively high-quality liquid hydrogen, the necessary quantity of subcooled hydrogen must be produced and injected into the bottom. Conversely, for less demanding customers, the production of saturated liquid hydrogen may suffice to meet their needs.

[0067] The filling rate of tank 6 is generally higher than the filling rate of storage 4. Therefore, it is preferable to anticipate the filling of storage 4, particularly in terms of temperature.

[0068] The bottom of storage tank 4 is therefore preferably filled with subcooled liquid hydrogen in advance of the filling of tanks 6. At the end of the filling of storage tank 4, the quantity of subcooled hydrogen produced and sent to the bottom of storage tank 4 must correspond at least to the mass that will be filled into tank 6. This mass could be optimized to also compensate for the heat input from the circuit lines. Based on the liquefied hydrogen production rate (which may vary in temperature) and the expected mass in tank 6 to be filled, the installation 1 (for example, component 10) can be configured to determine, for example, the time and duration of the start-up of the optimized subcooled hydrogen production.

[0069] As schematically illustrated in the [ Fig.3 For a less variable production of subcooled hydrogen, the liquid filling circuit 12 may include one or more additional outlets from storage 6 connected to different heights of storage 6 via separate lines 121, 122. This allows liquid to be drawn from storage 6, taking advantage of the hydrogen stratification in storage 4 (subcooled hydrogen being located in the lower part while saturated hydrogen is located in the upper part near the liquid / gas interface).

[0070] For example, if the optimal temperature required for filling is the saturation temperature, the intermediate storage outlet 121 can be used to draw off the liquid. The outlets can be connected via independent lines (and / or connected to a common line).

[0071] As schematically illustrated in the [ Fig.4], in the case where two (or more) storages 4 are available in the installation 1, one of the storages 4 can be filled with saturated hydrogen at the saturated temperature Tl1 while another storage 4 can be filled with subcooled liquid hydrogen (temperature Tl2).

[0072] The electronic control unit 10 can be configured (programmed) to determine the appropriate hydrogen mixture from these storage tanks 4 to fill a reservoir 6 to the target optimal temperature. Regulation can be achieved by a set of control valve(s) regulating the flow drawn from the storage tanks 6.

[0073] Storage 4 containing subcooled liquid can be used to compensate for flash and cooling losses, and could be used to fill a tank 6 with very cold hydrogen if necessary to achieve the required optimal thermodynamic filling point.

[0074] Thus, in this variant, installation 1 allows the production of subcooled hydrogen at optimized temperature and quantity. This hydrogen can be stored at the bottom of a storage tank 4 and used to fill a reservoir 6 to reach the optimal thermodynamic filling point.

[0075] The filling of reservoir 6 can be achieved by active pumping and / or simple passive connection with pressure differential.

[0076] Thus, installation 1 allows, via the controlled opening of the pressure regulating device 8, the tank to be brought to the filling pressure for the purpose of filling it with liquid. After filling, this pressure regulating device 8 (which may be part of the mobile tank 6) can be opened to further depressurize this tank 6 to a second, lower pressure suitable for transport or delivery, for example.

Claims

1. Facility for distributing liquefied hydrogen comprising a source (2) of gaseous hydrogen, a liquefier (3), at least one liquid hydrogen store (4), the liquefier (3) comprising an inlet connected to the source (2) and an outlet connected to an inlet of the store (4) via a liquid circuit (5) so as to store therein liquefied hydrogen produced by the liquefier (3), the facility (1) comprising a liquid filling circuit (12) provided with a first end connected to the store (4) and a second end intended to be removably connected to a first end of a mobile liquid tank (6) to be filled such as a semitrailer, the facility (1) further comprising a gas recovery circuit (7) provided with a first end intended to be removably connected to a second end of said tank (6) and a second end connected to a receiving member of the facility (1), for example an inlet of the liquefier (3), the gas recovery circuit (7) comprising a pressure and / or flow rate regulation member (8), such as a valve making it possible to lower the pressure in the mobile liquid tank (6) to a determined filling pressure (Pr), the facility (1) comprising an electronic control member (10) comprising a microprocessor configured to control all or part of the facility (1), the electronic control member (10) being configured to receive at least one signal (13) requesting filling of a mobile liquid tank (6), the facility (1) being characterized in that the pressure and / or flow rate regulation member (8) is adjustable and in that the electronic control member (10) is configured to control the latter so as to regulate the pressure level in a mobile liquid tank (6) to a determined filling pressure (Pr) as a function of a filling request signal (13) received.

2. Facility according to Claim 1, characterized in that the gas recovery circuit (7) comprises a compression member (11) disposed between the pressure and / or flow rate regulation member (8) and the second end connected to the liquefier, the compression member (11) being configured to compress the flow of gas coming from the first end to a determined pressure with a view to the reinjection thereof into the circuit of the liquefier (3).

3. Facility according to Claim 1 or 2, characterized in that the determined filling pressure (Pr) is selected between a determined minimum pressure (Pmini) and a determined maximum pressure (Pmax).

4. Facility according to Claim 3, characterized in that the determined minimum pressure (Pmini) is equal to 1.05 bar.

5. Facility according to Claims 2 and 3, characterized in that the compression member (11) is configured to operate with a minimum intake pressure at the inlet of said compression member (11), the determined minimum pressure (Pmini) being equal to the minimum intake pressure of the compression member (11) increased by a determined value corresponding at least to the pressure drop in the gas recovery circuit (7) between the first end and the inlet of said compression member (11).

6. Facility according to any one of Claims 3 to 5, characterized in that the determined maximum pressure (Pmax) is equal to the value of the pressure within the store (4), potentially reduced by the value of the pressure drop between the store (4) and the second end of the liquid filling circuit (12).

7. Facility according to any one of Claims 1 to 6, characterized in that the electronic control member (10) is configured to receive at least one signal (13) requesting filling of a mobile liquid tank (6) comprising at least one of the following filling parameters: maximum pressure level allowed in the tank (6), fluid pressure level required at the reception point(s) to which the tank (6) must deliver liquefied hydrogen after filling, quantity of liquefied hydrogen to be filled in the tank (6), distance that the tank (6) must travel after filling so as to deliver, in turn, liquefied hydrogen to the reception point(s), number of reception points to which the tank (6) must deliver liquefied hydrogen after filling, the temperature in the store (4), the volume of the tank (6); and in that the electronic control member (10) is configured to calculate the determined filling pressure level (Pr) as a function of said one or more of said parameters.

8. Facility according to any one of Claims 1 to 7, characterized in that the liquefier (3) is of the type with controlled variable cooling power, i.e. making it possible to vary the temperature (Tl) of the liquid hydrogen produced and in particular to produce liquid hydrogen that is sub-cooled relative to its saturated state, and in that the electronic control member (10) is configured to control the temperature level of the liquid hydrogen produced in the store (4) as a function of the request signal received.

9. Facility according to Claim 8, characterized in that the liquid filling circuit (12) comprises two drawingoff pipes (121, 122) connected at two different heights of the store so as to draw off hydrogen therefrom under different respective thermodynamic conditions.

10. Facility according to Claim 8 or 9, characterized in that it has two distinct stores (4) filled at different liquid hydrogen temperatures, the first end of the liquid filling circuit being connected to the stores, the liquid filling circuit comprising a set of valve(s) configured to make it possible to fill a tank (6) with a mixture of liquid coming from the stores (4) so as to obtain a determined liquid temperature.

11. Method for distributing liquefied hydrogen using a facility in accordance with any one of Claims 1 to 10, comprising a step of generating a signal (13) requesting filling of a mobile liquid tank (6), a step of calculating a determined filling pressure level (Pr) as a function of said signal and a step of filling the tank (6) with liquid hydrogen at the determined filling pressure level (Pr).

12. Method according to Claim 11, characterized in that the determined filling pressure level (Pr) is regulated during the filling step by controlling the opening of the pressure and / or flow rate regulation member (8).

13. Method according to Claim 12, characterized in that the control of the opening of the pressure and / or flow rate regulation member (8) is carried out during an operation of degassing the tank (6) during and / or prior to and / or following a transfer of liquid hydrogen into the tank (6).

14. Method according to any one of Claims 11 to 13, characterized in that the step of generating a filling request signal (13) is carried out manually and / or by telemetry, said signal being transmitted to the facility (1) .

15. Method according to any one of Claims 11 to 14, characterized in that it involves, prior to a transfer of liquid hydrogen into the tank (6) from the store (4), a step of calculating a determined temperature value (Tl) of liquefied hydrogen produced in the store (4) as a function of said signal (13) and a step of filling the store (4) with liquefied hydrogen at said determined temperature (Tl).

16. Method according to any one of Claims 11 to 15, characterized in that it involves, prior to a transfer of liquid hydrogen into the tank (6) from the store (4), a step of filling two distinct stores (4) with liquefied hydrogen at different temperatures (Tl1, Tl2) and a step of calculating a determined liquefied hydrogen temperature value (Tl) as a function of said signal and a step of filling a tank (6) at said determined temperature via a mixture of liquefied hydrogen coming from said stores (4).