Claims:We Claim:

1. A wind turbine comprising:
- a nacelle (3)
- a generator (12), arranged inside the nacelle (3), having at least two inde-pendent stator winding systems (18, 19),
- at least one power converter (14) connected to the generator (12) over at least one independent stator system (18) and
- at least one electrolyzer (16),
characterized in that
- the at least one electrolyzer (16) is connected to the generator (12) over at least one further independent stator winding system (19).

2. The wind turbine according to claim 1, wherein between the generator (12) and the at least one electrolyzer (16) a rectification unit (17) or a similar switching converter independent on the switching element or diode rectifier unit (17a, 17b) is arranged.

3. The wind turbine according to claim 1 or 2, wherein the independent stator winding systems (18, 19) are connected parallel or in series after the rectifica-tion unit (17).

4. The wind turbine according to one of the claims 1 to 3, wherein the electro-lyzers (16) are connected parallel or in series.

5. The wind turbine according to one 1 to 4, wherein the generator (12) com-prises at least two stator windings systems (18, 19, 24), wherein at least one stator winding system (18) is used for energy production and injected into the utility grid and the remaining stator winding systems (19, 24) are used for supplying electrical power to the at least one the electrolyzer (16).

6. The wind turbine according to one of the claims 1 to 6, wherein each stator wind system (1, 19, 24) comprises three phases.

7. The wind turbine according to one of the claims 1 to 6, wherein the at least one electrolyzer (16) is arranged inside the nacelle (3) or in a gas production unit (34) arranged inside or outside nacelle (3).

8. A method of operating a wind turbine according to one of the claims 1 to 7, characterized by operating the wind turbine (1) between electrical power production and hydrogen production based on available electrical power pro-duced by the wind turbine (1).

9. The method of operating a wind turbine according to claim 8, wherein the production of hydrogen is based on an energy production profile.

10. The method of operating a wind turbine according to claim 8 or 9, wherein a production of ammonia based on an energy production profile.

11. The method of operating a wind turbine according to one of the claims 8 to 10, wherein the energy production profile considers wind forecasting.

12. A wind turbine arrangement comprising:
- a wind turbine according to one of the claims 1 to 7, wherein the wind turbine (1) further comprises a tower (2, 2a) and
- a storage device (37) for hydrogen or a hydrogen transformation device for transforming hydrogen in another chemical product.

13. The wind turbine arrangement according to claim 12, wherein a water provid-ing element (50) for supplying water placed at ground level near the wind tur-bine (1).

14. The wind turbine arrangement according to claim 11 or 13, wherein a gas pro-duction unit (34) for generating hydrogen and nitrogen is arranged inside the tower (2, 2a).

15. The wind turbine arrangement according to claim 14, wherein the gas produc-tion unit (34) comprises at least one nitrogen generation element (38) and the at least one electrolyzer (16).

16. The wind turbine arrangement according to claim 15, wherein the gas produc-tion unit (34) further comprises a nitrogen storage device and a hydrogen storage device (37).

17. The wind turbine arrangement according to claim 15 or 16, wherein the gas production unit further comprises a gas mixing element (38).

18. The wind turbine arrangement according to one of the claims 12 to 17, where-in an ammonia production unit (42) is arranged inside the nacelle (3) or in a separate module of the nacelle (3).

19. The wind turbine arrangement according to one of the claims 12 to 18, where-in the ammonia production unit (42) comprises a compressor (32) and wherein the compressor (32) is driven by a high-speed shaft arrangement (62) of the wind turbine (1).

20. The wind turbine arrangement according to one of the claims 12 to 19, where-in an ammonia storage device (45) is arranged near the bottom of the wind turbine (1) and the ammonia storage device (45) is connected to the ammonia production unit (42).

21. The wind turbine arrangement according to one of the claims 12 to 20, where-in a water conditioning unit (46) for conditioning water is arranged near the bottom of the wind turbine (1) and is connected to the electrolyzer (16).

Dated this 25th day of January 2022
, Description:TITLE OF INVENTION

WIND TURBINE WITH DIRECT POWER SUPPLY FOR AN ELEC-TROLYZER

FIELD OF INVENTION

The present invention is directed to a wind turbine, a method of operating a wind turbine and a wind turbine arrangement described in the following.

BACKGROUND

According to the known prior art, wind turbines having electrolyzers are coupled to a DC link of a full power converter are known. Wind turbines with single line mixed production unit incorporated into the DC link.

Also known in the prior art is that ammonia is created from fossil fuel sources and outside of a wind turbine environment.

OBJECT OF THE INVENTION

One object of the present invention is to provide a wind turbine with independent power supply for the electrolyzer. A further object of the present invention is to provide a method for operating such a wind turbine. Furthermore it is an object of the present invention is to provide a wind turbine arrangement which allows a di-rect sea water usage at wind turbine level, along with method and arrangement to extract mechanical power directly from drive train for ammonia generation target-ing for the highest energy efficiency.

SUMMARY OF THE INVENTION

These objects should be solved by a wind turbine, a method for operating a wind turbine and a wind turbine arrangement described in the following.

According to one aspect of the present invention, the wind turbine comprises:
- a nacelle,
- a generator, arranged inside the nacelle, having at least two independent stator winding systems,
- at least one power converter connected to the generator over at least one one independent stator system and
- at least one electrolyzer,
characterized in that
- at least one electrolyzer is connected to the generator over at least one fur-ther independent stator winding system.

Advantageously, the generator can be a Squirrel Cage Induction Generator (SCIG), Electrically Excited Synchronous Generator (EESG) or a Permanent Magnet Synchronous Generator (PMSG). Independent from the type of the cho-sen generator, the generator comprises at least two, preferred three, independent stator winding systems. The preferred option is with three winding systems. The generated power is fed to at least one electrical system which is used for energy generation and at least one winding system which is used to produce hydrogen. The electrical energy system and the hydrogen production system are independent from each other, meaning that the hydrogen production is independent from the utility grid. The direct supply of electrical power from the generator to the elec-trolyzer requires rather low voltages without any conversion (except rectifying) or voltage level transformation.. Once such DC voltage supply is achieved, the entire hydrogen production process sees gains in efficiency.

More advantageously, the power converter is a full power converter. The full power converter has stabilization properties and tries to smooth and synchronize the wind dependent power generation profile of the wind turbine with the produc-tion of hydrogen.

In a preferred embodiment of the wind turbine, between the generator and the at least one electrolyzer a rectification unit or diode rectifier unit is arranged.

In a preferred embodiment of the wind turbine, the independent stator winding systems are connected parallel or in series after the rectification unit. Advanta-geously, the choice of the connection type depends on the required voltage of the electrolyzer which can vary with size and count.

In a preferred embodiment of the wind turbine, the electrolyzers are connected parallel or in series. Advantageously, the choice of the connection type depends on the provided voltages of the generator.

In a preferred embodiment of the wind turbine, the generator comprises at least three stator winding systems, wherein at least one stator winding system is used for energy production and injected into the utility grid and the remaining stator winding systems are used to supply electrical power to the at least one electrolyz-er.

In a preferred embodiment of the wind turbine, each stator wind system comprises three phases.

In a preferred embodiment of the wind turbine according to the present invention, the at least one electrolyzer is arranged inside the nacelle or in a gas production unit arranged inside or outside the nacelle.

According to further aspect of the present invention the method of operating a wind turbine according to one aspect of the present invention, the method com-prises the step of operating the wind turbine between electrical power production and hydrogen production based on available electrical power produced by the wind turbine.

In a preferred embodiment of the method of operating a wind turbine, the produc-tion of hydrogen is based on an energy production profile.

In a preferred embodiment of the method of operating a wind turbine, a produc-tion of ammonia is based on an energy production profile.

In a preferred embodiment of the method of operating a wind turbine, the energy production profile considers wind forecasting.

According to further aspect of the present invention, the wind turbine arrange-ment comprises of a wind turbine according to one aspect of the present invention, wherein the wind turbine further comprises a tower and a storage device for hy-drogen or a hydrogen transformation device for transforming hydrogen in another chemical product. One example for such a chemical product is ammonia. In this case, the wind turbine arrangement allows the production of green ammonia in an efficient way.

In a preferred embodiment of the wind turbine arrangement, a water providing element for supplying water placed at ground level near the wind turbine.

Advantageously, the water providing element can be a tank or a pool or any other suitable device for storing water. In case of a pool, the pool is covered to prevent the rapid evaporation of water. Alternatively, the water can be provided via a pipeline.

In a preferred embodiment of the wind turbine arrangement, a gas production unit for generating hydrogen and nitrogen is arranged inside the tower.

Advantageously the gas production unit is arranged at a lattice tower section of a hybrid lattice tower.

In a preferred embodiment of the wind turbine arrangement, the gas production unit comprises at least one nitrogen generation element and one of the at least one electrolyzer.

In a preferred embodiment of the wind turbine arrangement, the gas production unit further comprises a nitrogen storage device and a hydrogen storage device.

In a preferred embodiment of the wind turbine arrangement, the gas production unit further comprises a gas mixing element.

Advantageously, the gas mixing element provides a gas mixture of hydrogen and nitrogen in a relation 3:1. The gas mixture element is capable of other mixing rati-os.

In a preferred embodiment of the wind turbine arrangement, an ammonia produc-tion unit is arranged inside the nacelle or in a separate module of the nacelle.

Advantageously, the ammonia production unit is arranged outside the nacelle at any suitable side. In particular, this could be below and in wind direction at the rear end of the nacelle. Other suitable locations could be in modules placed on the left or right side of the nacelle.

More advantageously, the ammonia production unit comprises a small scale am-monia plant which transforms the gas mix of hydrogen and nitrogen into ammonia with use of a Haber-Bosch process.

In a preferred embodiment of the wind turbine arrangement, the ammonia produc-tion unit comprises of a compressor and wherein the compressor is driven by a high-speed shaft arrangement of the wind turbine. The high speed shaft arrange-ment is connected with the high-speed shaft, which is the shaft between a gearbox and the generator of a wind turbine. The direct feeding of the mechanical power provided by the high speed shaft to the compressor increases the efficiency of the wind turbine arrangement.

In a preferred embodiment of the wind turbine arrangement, an ammonia storage device is arranged near the bottom of the wind turbine and the ammonia storage device is connected to the ammonia production unit.

Advantageously, between the ammonia production unit and the ammonia storage is arranged an ammonia conditioning unit.

In a preferred embodiment of the wind turbine arrangement, a water conditioning unit for conditioning water is arranged near the bottom of the wind turbine and is connected to the electrolyzer.

Advantageously, the water conditioning unit comprises a reserve osmosis element for a purification process to filter out unwanted molecules and large particles such as contaminants and sediments like chlorine, salt, and dirt from the provided wa-ter like sea water and an electronic deionization element for reducing the anions and cations content of the De-mineralized water (DW).

BRIEF DESCRIPTION OF DRAWINGS

The invention will now be explained in more detail with respect to exemplary em-bodiments with reference to the enclosed drawings, wherein:

Figure 1 shows a wind turbine according to prior art;

Figure 2 shows a schematic view of a wind turbine according to an embodiment of the present invention;

Figure 3 shows a schematic view of a wind turbine according to a further embodiment of the present invention;

Figure 4 shows a partially view of the nacelle of the wind turbine ar-rangement;

Figure 5 shows a partially view of the tower and bottom of the wind turbine arrangement and

Figure 6 shows a schematic view of a wind turbine arrangement ac-cording to Figs 4 and 5.

The foregoing and other aspects will become apparent from the following detailed description of the invention when considered in conjunction with the accompany-ing drawing figures.

DETAILED DESCRIPTION OF THE INVENTION

Figure 1 depicts a schematic view of a wind turbine 1 with a tower 2 and a nacelle 3. Depending on given requirements the wind turbine 1 can be used for offshore or onshore applications. The nacelle 3 is rotatable mounted on the tower 2. The nacelle 3 incorporates a number of components of a drive train 4. The nacelle 3 also incorporates a generator (see Fig. 4) connected with a plurality of electrical components (not shown), which are described in detail later. Further the nacelle 3 comprises a yaw system (not shown) for rotating the nacelle 3. Said rotor shaft is connected to a rotor 5. The rotor 5 comprises three rotor blades 6 which are mounted to a hub body (not shown). Latter is connected to the rotor shaft of the drive train 4. The rotor blades 6 are adjustably mounted on the hub body. This is realized by means of pitch drives 8, said pitch drives 8 being part of a pitch system (not shown). The pitch system controls the rotor speed to given set points. By means of pitch-drives 8, the rotor blades 6 may be moved about a rotor blade 6 axes into different pitch positions, said rotor blade 6 axis extending in an axial direction of the rotor blades 6. Each rotor blade 6 is connected to the hub body via its pitch-drive 8. The nacelle 3 is covered by a nacelle cover 9, which has a nacelle cover interface 10. The hub body is covered by a spinner 11, wherein the hub body and spinner 11 forming a hub 7.

Figure 2 depicts a schematic view of one embodiment of the present invention. The generator 12 driven by a high speed shaft 13 is electrically coupled to a power converter 14 which is coupled to a transformer 15. The power converter 14 can be chosen from a full power converter or any other suitable power converter known from the prior art. Further the generator 12 is further electrically coupled to one or more electrolyzer 16 over a diode-based rectification unit 17. Therefore, the gen-erator 12 comprises at least two independent stator winding systems 18, 19 for coupling the power converter 14 and the electrolyzer 16 with the generator 12. One stator winding system 18 is connected with the power converter 14. The oth-er stator winding system 19 is coupled to the rectification unit 17 for transforming AC power into DC power, which will be supplied to the electrolyzer 16. Accord-ing to this embodiment the power converter 14 is coupled to the stator winding system 18 with a converter-sided power line 20. The power converter 14 is con-nected to the transformer 15 with a transformer-sided power line 21. The stator winding system 19 is coupled to the rectification unit 17 with a rectifier-sided power line 22. The rectification unit 17 is coupled with the electrolyzer 16 with a DC power line 23. The generator 12 can be chosen from a SCIG, EESG or a PMSG.

Dependent from the size and counts of the electrolyzer 16 several configurations are possible to connect more stator winding systems 19 with the electrolyzer 16. One possible configuration is that the winding systems after rectification are con-nected in series so that electrolyzer 16 is supplied with the required electrical pow-er. In another possible configuration the winding systems 19 are connected parallel so that one or more electrolyzers 16 can supplied with required electrical power. This configuration will be more explained with Fig. 3 below.

Having independent stator winding systems 19, at least one electrolyzer 16 can be operated independent from conditions of the utility grid. Therefore, the wind tur-bine 1 operates between electrical power production and hydrogen production based on available electrical power produced by the wind turbine 1. The produc-tion of hydrogen is based on an energy production profile (not shown). Possible configurations of the energy production profile are that the complete produced electrical power will be supplied to the utility grid, the complete produced electri-cal power will be supplied to the at least one electrolyzer 16 or the produced elec-trical power will be supplied to the utility grid and to the at least one electrolyzer 16 or to one of the at least one electrolyzer 16.

Figure 3 shows a further preferred embodiment of the present invention. Accord-ing to this embodiment the generator 12 is a SCIG having three independent sta-tor winding systems 18, 19, 24. The generator 12 is driven by the high speed shaft 13. The first stator winding system 18 is coupled to an inverter 25 of a full power converter 14a via a three phase converter-sided power line 20. The full power con-verter 14a has a rectifier 27 and a DC link 26 connecting the inverter 25 and recti-fier 27. The rectifier 27 is coupled to the transformer 15 via a three phase trans-former-sided power line 21. In this embodiment the diode-based rectification unit 17 is a diode rectifier 17a (different switching technology element can also be used). Further, according to this embodiment two diode rectifiers 17a, 17b are parallel connected. Same applies to the electrolyzers 16. The stator winding system 19 is coupled to the diode rectifier 17a via a three phase rectifier-sided power ine 22a. The diode rectifier 17a is coupled to the electrolyzer 16 via DC power line 23a. The stator winding system 24 is coupled to the diode rectifier 17b via a three phase diode converter-sided power line 22b. The diode rectifier 17b is coupled to the electrolyzer 16 via a DC power line 23b.

In the following with figures 4 to 6 a wind turbine arrangement 28 will be ex-plained. For a better overview, the electrical connections are indicated by a dashed line and fluid connections are indicated by a solid line.

With omission irrelevant components, figure 4 depicts a partially detailed view of the nacelle 3 according to the wind turbine arrangement 28. The nacelle 3 is mounted on top of the tubular tower section 29. Within the nacelle 3 is arranged the drive train 4 consisting of a slow speed shaft 53 for mechanically coupling the hub 7 with a gearbox 54. From the gearbox 54 the high speed shaft 13 drives the generator 12. Additionally, the high speed shaft 13 is mechanically coupled with the compressor 32 by means of a high-speed shaft arrangement 62. Maybe latter comprises a clutch (not shown). In the shown embodiment, the compressor 32 as well as the small scale ammonia plant 40 and the cooling element 41 are arranged at the ammonia production unit 42 in a module arranged below the nacelle 3. The ammonia production unit 42 is arranged below and in wind direction at the rear end of the nacelle 3. There, the ammonia production unit 42 is fixed to the nacelle in any suitable way. However, other positions are possible depending on the size of the wind turbine 1. Another suitable option is to arrange the compressor 32, small scale ammonia plant 40 and the cooling device 41 within the nacelle 3. Im-portant is that the compressor 32 is mechanically coupled with the high speed shaft 13 by means of the high-speed shaft arrangement 62. Optionally, the heat loss of the generator 12 will be used at least partially to heat-up the small scale ammonia plant 40.

As described above, the generator 12 is electrically coupled with the rectification unit 17 via the rectifier-sided power line 22 and the generator 12 is electrically coupled with the power converter 14 via the converter-sided power line 20. The diode converter 17 is electrically coupled with the electrolyzer 16 via the electro-lyzer-sided power line 23. In the shown embodiment the converter-sided power line 20 and the DC power line 23 are arranged inside of the tubular tower section 29 of the tower 2a. However, they can be arranged at any other suitable place. The gas mix pipe 55 having a gas mix of hydrogen and nitrogen connects the gas mix unit 39with the compressor 32. There the gas mix will be compressed and provid-ed over a high pressure pipe 56 to the small scale ammonia plant 40. There the gas mix will be transformed to ammonia, which will be transported to the cooling ele-ment 41 via a high temperature pipe 57. The cooled ammonia will be transported to the ammonia conditioning unit 43 via an ammonia pipe 58. The gas mix pipe 55 and the ammonia pipe 58 have a length which allows following the turning of the nacelle 3 during yawning. If necessary the pipes 55, 58 comprising flexible transi-tion pieces (not shown).

With omission irrelevant components figure 5 depicts a partially detailed view of the hybrid lattice tower 2a and the liquid conditioning module 44 according to the wind turbine arrangement 28. In the shown embodiment, the tower 2 is a hybrid lattice tower 2a which contains an upper tubular tower section 29 and a lower lat-tice tower section 30, wherein the tubular tower section 29 and the lattice tower 30 section are connected over a transition piece 31 (see Fig 6). However, other types of towers are possible. The converter-sided power line 20 connects the gen-erator 12 with the power converter 14 as described above, wherein the power con-verter 14 is arranged inside the transition piece 31. From the power converter 14 the electrical power will be forwarded to the transformer 15 via the transformer-sided power line 21. The transformer 15 is placed at the ground of the bottom area 33. The DC power line 23 is connected to the electrolyzer 16 arranged at the gas production unit 34. As described above, this gas production unit 34 further com-prises the demineralized water tank 35, the hydrogen gas conditioner 36, the hy-drogen tank 37, the nitrogen generation element 38 and the gas mixing element 39. The gas production unit 34 is electrically coupled to the transformer-sided power line 21. So the gas production unit 34 receives required electrical power from the wind turbine 1. From the gas production unit 34 the gas-mix pipe 55 runs to the compressor 32.

The liquid conditioning module 44 is arranged at the ground of the bottom area 33. The required electrical power for the liquid conditioning module 44 is provid-ed by the wind turbine 1. Thus, the liquid conditioning module 44 is electrically coupled with the transformer-sided power line 21. As described above the liquid conditioning module 44 comprises of a water conditioning unit 46 for demineraliz-ing water. Therefore, the water conditioning unit 46 comprises a reserve osmosis element 47 for a purification process to filter out unwanted molecules and large particles such as contaminants and sediments like chlorine, salt, and dirt from the provided water like sea water. Further the water conditioning unit 46 comprises of an electronic deionization element 48 for reducing ions in the water. The deminer-alized water is stored in the main demineralized water storage 49. Latter is in fluid communication with the water conditioning unit 46 via a water pipe 59a, which is in connected with a water providing element 50 via a sea water pipe 60 and a salt collector 51 via a salt pipe 61. Both are arranged outside the liquid conditioning module 44. The water providing element 50 provides water, in particular sea wa-ter, via a storage, pool or pipe. This water will be conditioned by the water condi-tioning unit 46 to demineralized water stored in the main demineralized water storage 49. This demineralized water will be used for the electrolysis. This process is well known in the prior art. The filtered salt from the water is collected in the salt collector 51.

For providing the demineralized water to the electrolyzer 16, a pump 52 is in fluid communication with the main demineralized water storage 49 and demineralized water tank 35 via water pipe 59c. The water tank 35 is further in fluid communica-tion with the electrolyzer 16. Furthermore, the liquid conditioning module 44 con-tains the ammonia conditioning unit 43 which is in fluid communication with the cooling element via the ammonia pipe 58. The conditioned ammonia will be trans-ported to the ammonia tank 45 via an ammonia pipe 58a.

Figure 6 depicts a schematic view of the wind turbine arrangement 28. Within the nacelle 3 the high speed shaft 13 driving the generator 12 and a compressor 32 is arranged beside other not shown components. The high-speed shaft 13 drives the generator 12 and the compressor 32. The stator winding system 19 of the genera-tor 12 is electrically coupled to the rectification unit 17, also arranged within the nacelle 3, via the rectifier-sided power line 22. The stator winding system 18 of the generator 12 is electrically coupled to the power converter 14, arranged within the transition piece 31 of the hybrid lattice tower 2a, via the converter-sided pow-er line 20. The power converter 14 is electrically coupled to the transformer 15, arranged at a bottom area 33 of the wind turbine 1, via the transformer-sided power line 21. The rectification unit 17 is electrically coupled with the electrolyzer 16, which is situated in the gas production unit 34 located in the lattice tower sec-tion 30, via the DC power line 23.

Within the lattice tower section 30, the gas production unit 34 and further compo-nents are arranged namely water tank 35, hydrogen gas conditioner 36, hydrogen tank 37, nitrogen generation element 38 and gas mixing element 39. The water tank 35 stores demineralized water and provides a water buffer for the electrolyz-er 16. Therefore, the water tank 35 is in fluid communication with the electrolyzer 16. The generated hydrogen of the is further processed by to the hydrogen gas conditioner 36 which stands in fluid communication with the electrolyzer 16 and with the gas mixing element 39 and the hydrogen tank 37. This is optional. All these components which require electrical power are supplied from a distribution panel (not shown) which is connected to the transformer-sided power line 21. The nitrogen generation element 38 generates nitrogen from the air and maybe stores it in an internal tank (not shown). The electrical power to generate the nitrogen is supplied from a distribution panel (not shown) which is connected to the trans-former-sided power line 21. The nitrogen generation element 38 is in fluid com-munication with the gas mixing element 39. At the gas mixing element 39 molecu-lar hydrogen H2 and molecular nitrogen N2 will be mixed with a relation 3:1. This gas mix is used for production of ammonia by means of a small scale ammonia plant 40 with use of a Haber-Bosch process. According to this, the molecular hy-drogen H2 is catalytically reacted with the molecular nitrogen N2 to form ammonia by the equation:
3 H2 + N2 ? 2 NH3
The gas mixing element 39 is in fluid communication with compressor 32 and pro-vides the gas mix of hydrogen H2 and nitrogen N2 to the compressor 32. Latter injects the gas mix to a small scale ammonia plant 40, which transforms the hydro-gen H2 and nitrogen N2 into ammonia NH3 by means of high pressure and high temperature. The produced ammonia NH3 will be transported to a cooling element 41. The compressor 32, the small scale ammonia plant 40 and the cooling element 41 are arranged below the nacelle 3 in a separate ammonia production unit 42 (see Fig. 5). After cooling the ammonia NH3 it will be forwarded to an ammonia con-ditioning unit 43. This ammonia conditioning unit 43 is arranged at a liquid condi-tioning module 44 which is placed at the bottom area 33 and is in fluid communi-cation with an ammonia tank 45 arranged outside of the liquid conditioning mod-ule 44. The liquid conditioning module 44 is electrically coupled utility grid and ensures the proper power supply for all the internal components arranged inside the liquid conditioning module 44.

Within the liquid conditioning module 44 is also arranged a water conditioning unit 46 for demineralizing water. Therefore, the water conditioning unit 46 com-prises a reserve osmosis element 47 for a purification process to filter out unwant-ed molecules and large particles such as contaminants and sediments like chlorine, salt, and dirt from the provided water like sea water. Further, the water condition-ing unit 46 comprises an electronic deionization element 48 for reducing the ions in the water. The demineralized water will be stored in main demineralized water storage 49. Latter is in fluid communication with the water conditioning unit 46, which is in fluid communication with a water providing element 50 and a salt col-lector 51. Both are arranged outside the liquid conditioning module 44. The water providing elements 50 provides water, in particular sea water, via a storage, pool, truck or pipe. This water will be conditioned by the water conditioning unit 46 to demineralized water stored in the main demineralized water storage 49. This de-mineralized water will be used for the electrolysis to hydrogen and oxygen at the electrolyzer 16. This process is well known in the prior art. The filtered salt from the water will be collected at the salt collector 51.

For providing the demineralized water, stored in the main demineralized water storage 49, to the electrolyzer 16 a pump 52 is in fluid communication with the main demineralized water storage 49 and demineralized water tank 35 which is further in fluid communication with the electrolyzer 16. In the shown embodi-ment, the pump 52 is arranged within the liquid conditioning module 44. Howev-er, it is also possible to arrange the pump outside of the liquid conditioning mod-ule 44 or at the gas production unit 34.

The electrical power for the hydrogen production as well as for the ammonia pro-duction is provided by the wind turbine 1 and based on energy production profile. The energy production profile considers the actual available electrical power based on present wind conditions and the wind forecast. Such energy production profile provides a maximal use of the available electrical power generated by the wind turbine 1. Therefore, for both ammonia and hydrogen production suitable thresh-olds values are optimally regulated according to the energy production profile.

LIST OF REFERENCE SIGNS

1 wind turbine
2 tower
2a hybrid lattice tower
3 nacelle
4 drive train
5 rotor
6 rotor blades
7 hub
8 pitch drive
9 nacelle cover
10 interface
11 spinner
12 generator
13 high speed shaft
14 power converter
14a full power converter
15 transformer
16 electrolyzer
17 rectification unit
18 first stator winding system
19 second stator winding sys-tem
20 converter-sided power line
21 transformer-sided power line
22 rectifier-sided power line
22a three phase rectifier-sided power line
22b three phase rectifier-sided power line
23 DC power line
24 third stator winding system
25 inverter
26 DC link
27 rectifier
28 wind turbine arrangement
29 tubular tower section
30 lattice tower section
31 transition piece
32 compressor
33 bottom area
34 gas production unit
35 demineralized water tank
36 hydrogen gas conditioner
37 hydrogen tank
38 nitrogen generation element
39 gas mixing element
40 small scale ammonia plant
41 cooling element
42 ammonia production unit
43 ammonia conditioning unit
44 liquid conditioning module
45 ammonia tank
46 water conditioning unit
47 reserve osmosis element
48 electronic deionization ele-ment
49 main demineralized water storage
50 water providing element
51 salt collector
52 pump
53 low speed shaft
54 gearbox
55 gas-mix pipe
56 high pressure pipe
57 high temperature pipe
58 ammonia pipe
58a ammonia pipe
59a water pipe
59b water pipe
59c water pipe
60 sea water pipe
61 salt pipe
62 high-speed shaft arrangement