Impurity detection system for a pressurized gas distribution station, and pressurized gas distribution station comprising such a system.

Abstract

A humidity detection system (100) for a pressurized gas distribution station (100), the system (100) comprising: - a sampling line (SL) configured to be connected to a transfer line (TL) of the distribution station (100), and to receive a gas flow from said transfer line (TL), - a cooling unit (60) in heat exchange with a cold portion of the sampling line (SL), the cooling unit (60) being configured to condense at least partially the water contained in the gas flow passing through the cold portion of the sampling line (SL) when the gas flow has a humidity level exceeding a predefined threshold, - a flow and / or pressure measuring unit disposed on the sampling line (SL) and configured to measure the flow and / or pressure of the gas flow passing through the cold portion of the sampling line (SL),- a controller connected to the flow and / or pressure measuring unit, the controller being configured to determine, based on a variation in the flow and / or pressure measured by the flow and / or pressure measuring unit, a humidity level in the gas stream. Figure 1,

Description

Title of the invention: Impurity detection system for a pressurized gas distribution station, and pressurized gas distribution station comprising such a system.

[0001] The invention relates to an impurity detection system for a pressurized gas distribution station. The invention also relates to a pressurized gas distribution station comprising such a detection system.

[0002] The gas in question may be hydrogen. The impurities concerned include, in particular, moisture.

[0003] Hydrogen is increasingly used as a low-carbon fuel, particularly in the transport sector, and more specifically in fuel cell electric vehicles. However, this fuel can contain impurities that have harmful and irreversible effects on fuel cell electric vehicles, as well as on the installations used for its distribution.

[0004] The presence of water in gaseous form in hydrogen constitutes one of these impurities.

[0005] Indeed, water in hydrogen can limit the fuel cell current and increase the overpotential. Furthermore, water can cause corrosion of the metallic components of the fuel cell and / or the distribution station. Finally, at relatively low temperatures, water turns into ice, which can clog pipes and cause mechanical problems.

[0006] International ISO standards impose a certain quality of hydrogen to prevent fuel cell degradation and ensure customer satisfaction. One of these standards is ISO 14687, which defines a threshold concentration value for each type of impurity that may be present in hydrogen.

[0007] Regarding humidity, the threshold value set by the standard is 5 ppm.mol. To maintain the humidity concentration level below the threshold indicated above throughout the hydrogen supply chain, one approach is to quantify the trace amounts of water in the hydrogen. A second approach is to remove excess moisture from the hydrogen.

[0008] In a known manner, the moisture contained in the hydrogen is quantified using an analyzer installed on the distribution station.

[0009] However, such an analyzer must have explosion-proof properties compatible with a dispensing station. Furthermore, such an analyzer requires a sampling system to regulate the pressure and injection flow rate into the analyzer, resulting An increase in the number of components and maintenance time. Hence, a relatively high cost for this type of equipment, for unsatisfactory reliability.

[0010] Furthermore, the removal of excess moisture is generally achieved through a conventional temperature-variable adsorption process. This process requires pure hydrogen for the regeneration of the adsorbents, making it uneconomical and inefficient.

[0011] Also, there appears to be a need to develop a humidity detection system that is simple to install on a pressurized gas distribution station, and that provides accurate, reproducible and stable results.

[0012] To this end, according to a first aspect, the invention proposes a humidity detection system for a pressurized gas distribution station, the system comprising: - a sampling line configured to be connected to a transfer line of the distribution station and to receive a gas flow from the transfer line, - a cooling unit in heat exchange with a cold portion of the sampling line, the cooling unit being configured to at least partially condense the water contained in the gas flow passing through the cold portion of the sampling line when the gas flow has a humidity level above a predefined threshold, - a flow and / or pressure measuring unit disposed on the sampling line, the flow and / or pressure measuring unit being configured to measure the flow and / or pressure of the flow passing through the sampling line, - a controller connected to the flow and / or pressure measuring unit, the controller being configured to determine, on the basis of a variation in the flow and / or pressure measured by the flow and / or pressure measuring unit, a humidity level in the gas flow.

[0013] The detection system described above can be easily coupled to a transfer line from a distribution station, without requiring major modifications to the latter.

[0014] In particular, this detection system can be coupled to a distribution station equipped with a drying and / or purification unit. In this case, the drying unit of the distribution station is no longer used continuously, but only when the detection system detects the presence of moisture in the gas above the predefined threshold.

[0015] Thus, the detection system according to the invention makes it possible to increase the lifespan of the drying unit and thus considerably reduce operating costs.

[0016] Other embodiments of the invention according to this first aspect may include the following features: - The controller is configured to detect a humidity level in the gas flow exceeding a predefined threshold. - The flow and / or pressure measurement unit comprises a first flow meter and a second flow meter, - The first flow meter and the second flow meter are positioned respectively upstream and downstream of the cold portion of the sampling line, - The flow and / or pressure measurement unit comprises a first pressure sensor and a second pressure sensor, - The first pressure sensor and the second pressure sensor are positioned upstream and downstream of the cold portion of the sampling line, respectively; - The sampling line is provided with at least one vent port; - The sampling line is provided with at least one restriction zone designed to limit the flow of gas circulating in the sampling line. - at least one constriction zone is located downstream of the cold zone and upstream of the vent opening, - at least one constriction zone is formed by a calibrated orifice of the sampling line, - said orifice has a diameter between 10 and 50 microns, - at least one constriction zone is formed by a tube with a cross-section relatively smaller than the rest of the sampling line, - The sampling line comprises a main pipe including the cold portion, and a bypass pipe from the main portion, - the bypass pipe is connected in parallel to the main pipe, - The flow and / or pressure measurement unit comprises a first pressure sensor located on the main pipe, and a second pressure sensor located on the bypass pipe. - the bypass pipe is connected to the main pipe at two junction points located respectively upstream and downstream of the cold section, - the first pressure sensor is located on the main pipe between the cold section and the downstream junction point, - the bypass pipe is connected to the main pipe at a single junction point located upstream of the cold section, - The main pipe and the branch pipe are each equipped with a vent and a restriction zone, - The predefined humidity level threshold is 5 ppm.mol, - the gas flow has a freezing point between -40 and -70°C, - the cooling unit is equipped with at least one temperature sensor.

[0017] According to a second aspect, the invention relates to a distribution station for a pressurized fluid, such as hydrogen. The distribution station comprises a transfer line which connects, in this order: a gas source, a drying system and a dispenser.

[0018] According to this second aspect of the invention, the station comprises at least one humidity detection system according to any one of the embodiments described above. The detection system is connected to the transfer line.

[0019] Other embodiments of the invention according to this second aspect of the invention may include the following features: - The transfer line comprises an upstream end connected to the source, a downstream end connected to the distributor, and two intermediate pipes connected in parallel to the upstream and downstream ends. - The drying system includes a temperature-modulated adsorption unit comprising two adsorbers arranged respectively on the intermediate pipes; - The distribution station includes a main detection system connected to the downstream end of the transfer line between the source and the drying system. - The distribution station includes a first secondary detection system connected to the first intermediate pipe at a point located downstream of the first adsorber, - The distribution station includes a second secondary detection system connected to the second intermediate pipe at a point located downstream of the second adsorber. - at least one of the adsorbers is equipped with a moisture drain pipe, - the distribution station includes an additional detection system connected to the drain pipe, - The transfer line includes a bypass pipe connected to the upstream end; - The bypass line is configured to carry the gas flow from the source to the distributor, without passing through the drying system. - the drying system also includes a heating unit intended to supply the adsorption unit with hot, dry gas.

[0020] The invention will be better understood with the aid of the figures below in which:

[0021] [Fig-1] illustrates an example of a pressurized gas distribution station equipped of a drying system, the station comprising at least one humidity detection system, according to a first embodiment of the invention.

[0022] [Fig.2] illustrates a variant of the detection system of the [Fig.1].

[0023] [Fig.3] illustrates a humidity detection system, according to a second mode of realization of the invention.

[0024] [Fig.4] illustrates a humidity detection system, according to a third embodiment of the invention.

[0025] With reference to [Fig. 1], the invention relates to a dispensing station 100 for a pressurized gas, such as hydrogen. In particular, it relates to a dispensing station 100 intended to supply fuel cell electric vehicles.

[0026] The distribution station 100 includes a transfer line TL which connects in this order a source 10 containing the pressurized gas, a drying system 20, and a distributor 30.

[0027] The transfer line TL comprises an upstream end la, a downstream end 1b and a pair of intermediate conduits 2a, 2b arranged in parallel between the upstream end la and the downstream end 1b.

[0028] The transfer line TL also includes a set of valves XV3, XV4, XV7, XV8 configured to ensure a flow of gas from the source 10 to the distributor 30 via selectively one of the intermediate lines 2a, 2b.

[0029] The drying system 20 includes a temperature-modulated adsorption unit 40a, 40b. The drying system 20 also includes a heating unit 50 for supplying hot gas to the adsorption unit 40a, 40b.

[0030] The adsorption unit 40a, 40b uses hydrophilic zeolites to trap and remove residual water, and thus supply dry hydrogen to the distributor 30. In addition, the adsorption unit 40a, 40b includes two adsorbers 40a, 40b which are each arranged on an intermediate conduit 2a, 2b of the transfer line TL.

[0031] In particular, the adsorbers 40a, 40b are each arranged between an upstream valve XV3, XV4 and a downstream valve XV7, XV8 of an intermediate pipe 2a, 2b. In addition, the adsorbers 40a, 40b are each equipped with a discharge pipe 3a, 3b.

[0032] The heating unit 50 can be supplied with hot gas from a storage tank at the distribution station 100 via a supply line 4. Such a supply line 4 can be fitted with a valve XV9.

[0033] In addition, the heating unit 50 transfers the hot gas to the adsorbers 40a, 40b via respectively a first heating line 5a and a second heating line 5b.

[0034] Finally, the heating unit 50 communicates with the first intermediate pipe 2a and the second intermediate pipe 2b respectively via a first communication pipe 6a and a second communication pipe 6b. The communication pipes 6a and 6b are each equipped with a valve XV5 and XV6.

[0035] The distributor 30 includes a set of measuring means for measuring the temperature, pressure, and flow rate of the gas transferred from the source 10 to a tank to be filled. The distributor 30 also includes a supply hose equipped with a nozzle intended to be inserted into a receptacle in the tank to be filled.

[0036] According to the invention, the distribution station 100 comprises at least one humidity detection system, which is connected to any one of the pipes 1a, 2a, 2b, 3a, 3b of the transfer line TL. The humidity detection system is hereinafter referred to as the “detection system”.

[0037] In particular, the distribution station 100 includes a main detection system which is connected to the upstream end of the transfer line TL. More specifically, the main detection system is connected to the upstream end between the gas source 10 and the drying system 20.

[0038] Thanks to the main detection system, the invention allows the drying system 20 to be used only when such use is necessary. Thus, the invention makes it possible to considerably increase the lifespan of the drying system 20.

[0039] Furthermore, the distribution station 100 includes a first secondary detection system and a second secondary detection system. The first secondary detection system is connected to the first intermediate pipe 2a downstream of the first adsorber 40a. The second secondary detection system is connected to the second intermediate pipe 2b downstream of the second adsorber 40b. The two secondary detection systems can operate alternately.

[0040] Thanks to the secondary detection systems, the invention makes it possible to reduce the amount of pure hydrogen required for the regeneration of adsorbents in each adsorber 40a, 40b.

[0041] Finally, station 100 includes a first additional detection system and a second additional detection system. These additional detection systems are connected respectively to the first discharge pipe 3a (associated with the first adsorber 40a) and to the second discharge pipe 3b (associated with the second adsorber 40b).

[0042] Additional detection systems make it possible to ensure that drying at the level of the adsorbers has been carried out correctly.

[0043] Each detection system includes a sampling line SL, a cooling unit 60 which is in heat exchange with a portion of the sampling line SL, a flow and / or pressure measuring unit disposed on the sampling line SL, and a controller connected to the measuring and / or pressure unit.

[0044] In particular, the sampling line SL is connected to a specific conduit 1a, 2a, 2b, 3a, 3b of the transfer line TL. The sampling line SL is provided with at least one vent port and at least one restriction zone FO.1, FO.2, FO.3 intended to limit the flow rate of gas circulating in the sampling line SL, for example to a value less than 50 Nml / min.

[0045] Advantageously, the necking zone FO.1, FO.2, FO3 is formed by a calibrated orifice in the sampling line SL. This orifice has a diameter between 10 and 50 microns. Alternatively, the necking zone FO.1, FO.2, FO.3 is made up of a tube thinner than the rest of the SL sampling line.

[0046] In the illustrated example, the constriction zone FO.1, FO.2, FO.3 is located downstream of the cold zone and upstream of the first venting orifice.

[0047] The cooling unit 60 is capable of at least partially condensing the water contained in a gas stream flowing in the sampling line SL when said stream has a humidity level above a predefined threshold.

[0048] The controller is configured to indicate, based on a variation in flow rate and / or pressure measured by the flow rate and / or pressure measurement unit, a freezing of the gas flow, and consequently a humidity level in the gas flow above the predefined threshold.

[0049] Advantageously, the transfer line TL includes a bypass line 1 of the intermediate lines 2a, 2b. The bypass line is configured to ensure the flow of gas from the source 10 to the distributor 30 without passing through the drying system 20. The bypass line 1 is connected to the upstream end 1a, upstream of the intermediate lines 2a, 2b.

[0050] In order to allow a flow of gas through the bypass line, the transfer line TL is equipped with at least one bypass valve.

[0051] In the illustrated example, the transfer line TL is equipped with two bypass valves XVI, XV2: a first valve XVI disposed on the bypass pipe le and a second valve XV2 disposed on the upstream end la, upstream of the intermediate pipes 2a, 2b.

[0052] Advantageously, station 100 includes a cooling unit 60 which is common to all detection systems.

[0053] The common cooling unit replaces the respective cooling units of the detection systems. This common cooling unit takes the form of a cold chamber through which the respective SL sampling lines of the different detection systems pass.

[0054] In the example illustrated in [Fig. 1], the sampling line SL of each detection system comprises a pipe 7a, 8a, 8b, 9a, 9b, which includes the cold portion in heat exchange with the cooling unit 60. The flow and / or pressure measuring unit of each detection system comprises a first pressure sensor PT.1, PT.3, PT.5, PT7, PT.9 and a second pressure sensor PT.2, PT.4, PT.6, PT.8, PT.10, which are arranged on the sampling line 7a, 8a, 8b, 9a, 9b, respectively upstream and downstream of the cold portion.

[0055] In an alternative illustrated in [Fig. 2], the flow and / or pressure measuring unit of each detection system may comprise a first flow meter FT.1 and a second flow meter FT.2 which are arranged on the pipe 7a, respectively in upstream and downstream of the cold section. These FT.1, FT.2 flow meters are intended to complement or replace the PT.1, PT.2 pressure sensors.

[0056] In a second embodiment illustrated in [Fig.3], the sampling line SL of any of the detection systems may include a main line 7a which has the cold portion in heat exchange with the cooling unit 60, and a bypass line 7b of the main line 7a.

[0057] The bypass pipe 7b is connected to the main pipe 7a at two junction points located respectively upstream and downstream of the cold section. In addition, the bypass pipe 7b extends outside the cooling unit 60.

[0058] In this second embodiment, the flow measurement unit comprises a first flow sensor FT.1 disposed on the main pipe 7a, and a second flow sensor FT.2 disposed on the bypass pipe 7b. In particular, the first flow sensor FT.1 is disposed between the cold portion and the downstream junction point.

[0059] In a third embodiment illustrated in [Fig.4], the sampling line SL of any of the detection systems may include a main line 7a which has the cold portion in heat exchange with the cooling unit 60, and a bypass line 7c of the main line 7a.

[0060] The bypass pipe 7c is connected to the main pipe 7a at a single junction point located upstream of the cold section. In addition, the bypass pipe 7c extends outside the cooling unit 60.

[0061] In this third embodiment, the flow and / or pressure measuring unit comprises a flow and / or pressure sensor FT.1, PT.1 disposed on the main line 7a, and a flow and / or pressure sensor FT.2, PT.2 disposed on the bypass line 7c.

[0062] In addition, each of the pipes 7a, 7c can be provided with a vent and a restriction zone FO.1, FO.2. On the main pipe 7a, the restriction zone FO.1 is located downstream of the cold zone and upstream of the vent.

[0063] In steady state, a gas flow passes through the sampling line 7a connected to the upstream end of the transfer line TL. The flow rate is regulated by the restriction zone FO. 1. The pressure of this flow is measured upstream and downstream of the cold portion of the sampling line 7a using sensors PT.1 and PT.2. The controller compares the pressure values ​​provided by sensors PT.1 and PT.2, respectively.

[0064] As long as the pressure difference remains zero or below a certain predefined threshold, that is, as long as the flow through the sampling line 7a is in pressure equilibrium on both sides of the cold portion, the second valve XV2 of the bypass remains closed and the first bypass valve XVI remains open, thus ensuring a flow of gas from the source 10 to the distributor 30, without passing through the drying system 20.

[0065] A pressure variation between the values ​​measured by sensors PT.1 and PT.2 indicates the formation of a thin layer of ice in the sampling line 7a. In this case, the first bypass valve XVI closes and the second bypass valve XV2 opens to allow the gas flow to the drying system 20.

[0066] When the drying system 20 is put into operation, only the first absorber 40a of the adsorption unit 40a, 40b can be activated initially. To do this, the upstream valve XV4 located on the second secondary line 2b remains closed and the upstream valve XV3 located on the first secondary line 2a opens.

[0067] At the same time, a gas flow passes from the first intermediate pipe 2a to the sampling pipe 8a where the flow rate is regulated by the restriction zone FO.2 and where the pressure is measured upstream and downstream of the cold portion using the pressure sensors PT.3, PT.4. The controller compares the pressure values ​​measured by the sensors PT.3, PT.4.

[0068] A balance between the pressure values ​​measured by sensors PT.3 and PT.4 means that the gas is properly dried and can be directed to the downstream end 1b of the transfer line TL. To achieve this, the downstream valve XV7 located on the first intermediate pipe 2a remains open and the downstream valve XV8 located on the second intermediate pipe 2b remains closed.

[0069] A variation beyond a certain threshold between the pressure values ​​measured by the sensors PT.3, PT.4 of the sampling line 8a is a sign of ice formation in this line 8a, and therefore a sign of saturation of the first adsorber 40a.

[0070] In this case, the upstream valve XV3 located on the first intermediate pipe 2a closes and the upstream valve XV4 located on the second intermediate pipe 2b opens to allow the gas to pass to the second adsorber 40b. At the same time, a gas flow passes from the second intermediate pipe 2b to the sampling pipe 8b, where the flow rate is regulated by the restriction zone FO.2, and where the pressure is measured upstream and downstream of the cold section using sensors PT.5 and PT.6. The controller compares the pressure values ​​measured by sensors PT.5 and PT.6.

[0071] A balance between the values ​​measured by sensors PT.5 and PT.6 means that the gas is correctly dried at the second adsorber 40b and can be directed to the downstream end 1b of the transfer line TL. For the purposes of this operation, the Valve XV8 located on the second intermediate line 2b is kept open, and valve XV7 located on the first intermediate line 2a is kept closed.

[0072] In parallel, a stream of dried gas from the second adsorber 40b can be directed to the heating unit 50 to create a mixture of hot and dried gas. For this purpose, valve XV5 of the first communication line 6a is kept closed, and valve XV6 of the second communication line 6b is kept open.

[0073] In the event that the gas flow from the second communication line 6b is not sufficient to dry the first adsorber 40a, the heater 50 can be supplied with dry gas from a storage tank of the distribution station 100 via a supply line 4.

[0074] The hot, dried gas mixture produced by the heating unit 50 can in turn be directed to the first adsorber 40a to regenerate the adsorption unit 40a, 40b.

[0075] Thus, the regeneration of the first adsorber 40a only occurs when it reaches saturation, which is indicated by the variation in pressure and / or flow rate (and therefore the formation of a thin layer of ice) recorded at the sampling line 8a. In other words, the invention makes it possible to reduce the consumption of pure hydrogen required for the regeneration of the adsorbents in the adsorber 40a.

[0076] After saturation of the second adsorber 40b, the valves XV4, XV8 are closed. The first adsorber 40a takes over for a new cycle of the operations described above.

[0077] Thus, the invention optimizes the use of each adsorber 40a, 40b, increasing the lifespan of each desiccant bed.

Claims

Demands

1. A humidity detection system (100) for a pressurized gas distribution station (100), the system (100) comprising: - a sampling line (SL) configured to be connected to a transfer line (TL) of the distribution station (100), and to receive a gas flow from the transfer line (TL), - a cooling unit (60) in heat exchange with a cold portion of the sampling line (SL), the cooling unit (60) being configured to condense at least partially the water contained in the gas flow passing through the cold portion of the sampling line (SL) when the gas flow has a humidity level exceeding a predefined threshold, - a flow and / or pressure measuring unit disposed on the sampling line (SL) and configured to measure the flow and / or pressure of the gas flow passing through the cold portion of the sampling line (SL),- a controller connected to the flow and / or pressure measuring unit, the controller being configured to determine, based on a variation in the flow and / or pressure measured by the flow and / or pressure measuring unit, a humidity level in the gas flow.

2. System according to claim 1, wherein the controller is configured to detect a humidity level in the gas stream above the predefined threshold.

3. System according to claim 1, wherein the flow and / or pressure measuring unit comprises a first flow meter (FT.1) and a second flow meter (FT.2) disposed respectively upstream and downstream of the cold portion of the sampling line (SL), and / or a first pressure sensor (PT.1, PT.3, PT.5, PT.7, PT.9) and a second pressure sensor (PT.2, PT.4, PT.6, PT.8, PT.10) disposed respectively upstream and downstream of the cold portion of the sampling line (SL).

4. System according to any one of the preceding claims, wherein the sampling line (SL) is provided with at least one venting orifice and at least one restriction zone (FO.1, FO.2), the at least one restriction zone (FO.1, FO.2) being intended to limit the flow of gas circulating in the sampling line (SL).

5. System according to the preceding claim, wherein at least one restriction zone (FO.1, FO.2) is disposed downstream of the cold zone and upstream of the venting orifice.

6. System according to any one of claims 4 or 5, wherein at least one necking zone (FO.1, FO.2) is constituted by a calibrated orifice of the sampling line (SL), said orifice having a diameter between 10 and 50 microns.

7. System according to any one of claims 4 or 5, wherein at least one restriction zone (FO.1, FO.2) is constituted by a tube with a cross-section relatively smaller than the rest of the sampling line (SL).

8. System according to any one of claims 1 to 7, wherein the sampling line (SL) comprises a main line (7a) including the cold portion, and a bypass line (7b, 7c) of the main portion (7a), the bypass line (7b, 7c) being connected in parallel to the main line (7a), the flow and / or pressure measuring unit comprising a first pressure sensor (PT.1) disposed on the main line (7a), and a second pressure sensor (PT.2) disposed on the bypass line (7b, 7c).

9. System according to the preceding claim, wherein the bypass pipe (7b) is connected to the main pipe (7a) at two junction points located respectively upstream and downstream of the cold section, the first pressure sensor (PT.l) being disposed on the main pipe (7a) between the cold section and the downstream junction point.

10. System according to claim 8, wherein the bypass pipe (7c) is connected to the main pipe (7a) at a single junction point located upstream of the cold portion, the main pipe (7a) and the bypass pipe (7c) each being provided with a venting orifice and a restriction zone (FO.1, FO.2).

11. System according to any one of claims 1 to 10, wherein the predefined threshold of the humidity level is 5 ppm.mol, and wherein the gas flow has a freezing temperature between -40 and -70°C.

12. System according to any one of claims 1 to 11, wherein the cooling unit (20) is provided with at least one temperature sensor.

13. Station (100) for distributing a pressurized fluid such as hydrogen, the station (100) comprising a transfer line (TL) which includes in this order: a gas source (10), a drying system (20) and a distributor (30), characterized in that it includes at least one moisture detection system according to any one of the preceding claims, the detection system being connected to the transfer line (TL).

14. Station (100) according to the preceding claim, wherein the transfer line (TL) comprises an upstream end (la) connected to the source (10), a downstream end (1b) connected to the distributor (30) and two intermediate lines (2a, 2b) connected in parallel to the upstream end (la) and the downstream end (1b), the drying system (20) comprising a temperature-modulated adsorption unit (40a, 40b) which includes two adsorbers (40a, 40b) arranged respectively on the intermediate lines (2a, 2b).

15. Station (100) according to the preceding claim, comprising a main detection system connected to the downstream end (la) of the transfer line (TL) between the source (10) and the drying system (20).

16. Station (100) according to any one of claims 14 or 15, comprising a first secondary detection system connected to the first intermediate pipe (2a) at a point located downstream of the first adsorber (40a), and / or a second secondary detection system connected to the second intermediate pipe (2b) at a point located downstream of the second adsorber (40b).

17. Station (100) according to any one of claims 14 to 16, wherein at least one of the adsorbers (40a, 40b) is equipped with a moisture discharge line (3a, 3b), the station (100) comprising an additional detection system connected to the discharge line (3a, 3b).

18. Station (100) according to any one of claims 14 to 17, wherein the transfer line (TL) comprises a bypass line (the) connected to the upstream end (the), the bypass line (the) being configured to carry the gas flow from the source (10) to the distributor (30), without passing through the drying system (20).

19. Station (100) according to any one of claims 14 to 18, wherein the drying system (20) further comprises a unit (50) heating unit intended to supply the (40a, 40b) hot, dry gas adsorption unit.

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