Method and system for improving efficiency of water electrolysis system

Abstract

A method for improving the efficiency of a water electrolysis system and a system thereof are disclosed. The system comprises: an electrolysis stack; a power supply configured to supply a voltage to the anode and cathode of the electrolysis stack; and a contact galvanic tube connected to the anode such that the fluid circulates within the tube. The fluid includes at least water. Power generated in the contact galvanic tubes is supplied to a power source to improve power efficiency.

Description

[0001] Cross-references to related applications

[0002] This application claims the benefit of priority to Korean Patent Application No. 10-2024-0137124, filed with the Korean Intellectual Property Office on October 8, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to water electrolysis systems, and more specifically, to techniques for improving the efficiency of water electrolysis systems by utilizing the triboelectric effect. Background Technology

[0004] Carbon neutrality is currently an important topic worldwide.

[0005] Major economies are seeking ways to expand electricity production by using renewable energy sources instead of traditional fossil fuels.

[0006] Green energy systems are systems that use energy obtained through renewable energy sources such as wind, hydro, tidal, and solar power as electricity and hydrogen.

[0007] Among them, green hydrogen is assessed as the ultimate environmentally friendly energy source because it emits no greenhouse gases at all from the production stage. Based on the production method, hydrogen, which has emerged as an alternative energy source globally, can be roughly divided into gray hydrogen, blue hydrogen, and green hydrogen.

[0008] Gray hydrogen is produced by modifying natural gas, and although it can be mass-produced and has low production costs, it generates a large amount of greenhouse gases.

[0009] Blue hydrogen refers to hydrogen that reduces greenhouse gas emissions by capturing or storing greenhouse gases produced during the production of gray hydrogen.

[0010] Green hydrogen is produced by electrolyzing water using renewable energy sources and does not emit any greenhouse gases from the production stage, but it has low economic viability due to high production costs.

[0011] Recently, research has been actively conducted on water electrolysis devices for producing green hydrogen. However, to make green hydrogen competitive as an energy carrier, the unit cost of hydrogen production must be reduced. Moreover, the electricity required for electrolysis and the unit cost of water electrolysis reactors are currently high, making it necessary to improve power efficiency and reduce costs. Summary of the Invention

[0012] This disclosure has been made to address the aforementioned problems in the prior art while maintaining the advantages achieved by the prior art.

[0013] An aspect of the disclosure provides a method for improving the efficiency of a water electrolysis system and a system thereof.

[0014] An aspect of the disclosure also provides a method for improving the efficiency of a water electrolysis system and a system thereof, by which, through designing a tube for water circulation in a water electrolysis system having a structure that can utilize a triboelectric effect, through utilizing additional power generated through circulation of water, power efficiency of hydrogen production can be improved.

[0015] An aspect of the disclosure also provides a water electrolysis system that can continuously generate additional power by continuously circulating water through a tube of an anode in a water electrolysis system by applying a contactor tube as the tube of the anode.

[0016] The technical problems to be solved by the disclosure are not limited to the above-mentioned problems, and any other technical problems not mentioned herein will be clearly understood by those skilled in the art from the following description.

[0017] According to an aspect of the disclosure, a water electrolysis system includes an electrolysis stack, a power supply that supplies a voltage to an anode and a cathode of the electrolysis stack, and a contactor tube connected to the anode so that a fluid circulates within the contactor tube, and the fluid contains at least water, and power generated in the contactor tube is supplied to the power supply.

[0018] The contactor tube can further include an inner non-conductive layer that contacts the fluid and a conductive layer disposed on an outer surface of the non-conductive layer.

[0019] The non-conductive layer can be formed of any one material among polytetrafluoroethylene (PTEF), polydimethylsiloxane (PDMS), and polyethylene (PE).

[0020] The conductive layer can be formed of any one material among aluminum and copper.

[0021] The conductive layer can be alternately disposed at regular intervals around the non-conductive layer.

[0022] The conductive layer can be formed by winding an electric wire in the form of a coil around the non-conductive layer.

[0023] The electrolysis stack can further include a power converter that converts AC power generated in the contactor tube into DC power, and the DC power is used as additional power of the power supply.

[0024] As the fluid flows, a double electric layer can be formed between the fluid and the contactor tube to generate power.

[0025] The water electrolysis system can further include a circulator that continuously supplies the fluid to the anode through a pump connected to the contactor tube, and filters the fluid discharged from the anode to store the fluid in a water tank.

[0026] The water electrolysis system can further include a gas / liquid separator that separates hydrogen gas from the fluid discharged from the cathode, a third tube disposed between the cathode and the gas / liquid separator, and a hydrogen tank that stores the separated hydrogen gas.

[0027] According to an aspect of the disclosure, a method for improving the efficiency of a water electrolysis system includes continuously supplying a fluid to an anode of an electrolysis stack through a first contactor, applying a voltage to the anode and a cathode of the electrolysis stack through a power source, recovering the fluid discharged from the anode through a second contactor, and supplying power generated in the first and second contactors to the power source as additional power of the electrolysis stack using a triboelectric effect according to circulation of the fluid, wherein the fluid can further include at least water.

[0028] The first and second contactors can further include an inner non-conductive layer that contacts the fluid and a conductive layer disposed at the periphery of the non-conductive layer.

[0029] The non-conductive layer can be formed of any one material among polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), and polyethylene (PE).

[0030] The conductive layer can be formed of any one material among aluminum and copper.

[0031] The conductive layer can be alternately disposed at regular intervals at the periphery of the non-conductive layer.

[0032] The conductive layer can be formed by coiling an electric wire in the form of a coil at the periphery of the non-conductive layer.

[0033] The electrolysis stack can further include a power converter configured to convert AC power generated in the first and second contactors, and DC power can be used as additional power of the electrolysis stack.

[0034] As the fluid flows, a double electric layer can be formed between the fluid and the first and second contactors to generate power.

[0035] The method can further include filtering the recovered fluid to store the fluid in a water tank.

[0036] The fluid supplied to the anode passes through a separator provided in the electrolysis stack to be supplied to the cathode, and the method can further include separating hydrogen gas from the fluid discharged from the cathode and storing the separated hydrogen gas in a hydrogen tank. BRIEF DESCRIPTION OF DRAWINGS

[0037] The above and other objects, features and advantages of the disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which:

[0038] Figure 1 is a view illustrating a structure and an operation of a general water electrolysis system;

[0039] Figure 2 is a block diagram illustrating a structure of a water electrolysis system according to an embodiment of the disclosure;

[0040] Figure 3 is a view illustrating a structure and an operation of a water electrolysis system according to an embodiment of the disclosure;

[0041] Figures 4 to 5 is a view illustrating a structure of a contactor and a process of forming a double electric layer by friction in a tube according to an embodiment of the disclosure;

[0042] Figure 6 is a flowchart illustrating a method for improving efficiency of a water electrolysis system according to an embodiment of the disclosure; and

[0043] Figure 7 is a view illustrating a computing device according to an embodiment of the disclosure. DETAILED DESCRIPTION

[0044] Hereinafter, some embodiments of the disclosure will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals will be used throughout the drawings to refer to the same or like components. In describing embodiments of the disclosure, if a well-known function or configuration related to the subject matter of the disclosure can make the subject matter of the disclosure unnecessarily vague, a detailed description thereof will be omitted.

[0045] In describing components of embodiments of the disclosure, the terms first, second, A, B, (a), (b), etc. can be used herein. These terms are used only to distinguish one element from another element, but do not limit the corresponding elements, the nature, order or priority of the corresponding elements. In addition, unless otherwise defined, all terms used herein, including technical terms and scientific terms, will be interpreted as a conventional term in the art to which the disclosure belongs. Those terms as defined in a generally used dictionary should be interpreted as having the same meaning as the contextual meaning in the relevant art, and should not be interpreted as having an ideal or overly formal meaning, unless clearly defined in the present application as having an ideal or overly formal meaning.

[0046] Hereinafter, some embodiments of the disclosure will be described in detail with reference to the accompanying drawings. In the drawings, like reference numerals will be used throughout the drawings to refer to the same or like components. In describing embodiments of the disclosure, if a well-known function or configuration related to the subject matter of the disclosure can make the subject matter of the disclosure unnecessarily vague, a detailed description thereof will be omitted. Figures 1 to 4 Embodiments of the disclosure will be described in detail.

[0047] Figure 1 is a view illustrating a structure and an operation of a general water electrolysis system;

[0048] Reference is made to Figure 1The water electrolysis system 100 can mainly include an electrolysis stack 110 and first to third tubes 120 to 140.

[0049] The electrolysis stack 110 can include a power source 111, an anode 112, a cathode 113, a separator (diaphragm) 114, and first and second catalytic plates 115 and 116.

[0050] Water electrolysis is a method of generating hydrogen gas by electrochemically decomposing water supplied to the electrolysis stack 110.

[0051] As shown in FIG. 1, Figure 1 The first tube 120 is a tube for supplying water to the electrolysis stack 110.

[0052] When the power source 111 is applied and water is continuously supplied to the anode 112 of the electrolysis stack 110 through the first tube 120, electrolysis begins. Oxygen is generated at the anode 112 as a positive (+) electrode, and hydrogen gas is generated at the cathode 113 as a negative (-) electrode.

[0053] The second tube 130 is a tube that discharges water and oxygen generated in the anode 112, and the third tube 140 is a tube that discharges water and hydrogen gas generated in the cathode 113.

[0054] Water discharged through the second tube 130 can be recirculated via a filter system.

[0055] Water supplied to the anode 112 can be delivered to the cathode 113 through the separator 114, and the water is discharged through the third tube 140 together with hydrogen gas generated in the cathode 113.

[0056] Water and hydrogen gas discharged through the third tube 140 can be separated into a liquid and a gas by a gas / liquid separator to obtain hydrogen gas.

[0057] In the case of a green energy system, the electric power supplied to the electrolysis stack 110 can be mainly associated with renewable energy such as wind power, hydro power, tidal power, and solar power.

[0058] Figure 2 is a block diagram illustrating a structure of a water electrolysis system according to an embodiment of the disclosure.

[0059] Referring to Figure 2 , the water electrolysis system 200 can include at least one of a main power supply (or power source) 210, a water electrolysis stack 220, a circulator 230, a hydrogen gas storage 240, a contact electrochemical tube 250, and a contact electrochemical power conversion 260.

[0060] In addition to the development of sustainable and environmentally friendly energy, energy harvesting, which can solve the power supply problem of various devices, has recently attracted great attention. Energy harvesting technology is a technology that collects electric power from energy sources such as light, heat, and vibration, which are discarded in real life.

[0061] Energy harvesting was selected as one of the top ten promising technologies by MIT, and as one of the 45 innovative technologies that will shake the world by Popular Science of the American Science Journal, and research is actively being conducted worldwide to preempt this technology.

[0062] Among various energy harvesting technologies, there is a triboelectric generator element that generates power by combining contact electrostatic induction and electrostatic induction.

[0063] Contact electrification (or triboelectricity) refers to a phenomenon in which the surfaces of two objects are positively and negatively charged, respectively, when the surfaces of the two objects are separated after being in contact.

[0064] Triboelectricity is a type of contact electrification in which electrons from one object move to another object through frictional energy generated when a specific material rubs against another material.

[0065] The triboelectric effect (also known as triboelectric charging) is a type of contact electrification in which a specific material becomes electrified after being separated from other materials in contact.

[0066] The strength of triboelectricity can be determined by the coefficient of friction.

[0067] The coefficient of friction μ is the ratio of the normal force "N" acting on the contact surface when two objects are in contact to the frictional force "F" that resists free sliding. In the case of horizontally pulling or pushing an object, the normal force "N" is only the weight of gravity (or weight). In the equation μ = F / N, both "F" and "N" are measured in units of force (newtons), and thus the coefficient of friction is dimensionless. The type and value of the coefficient of friction can vary depending on the materials, surface conditions, and the type of resistance (static friction or dynamic friction) of the two objects.

[0068] Hereinafter, a water electrolysis system and a method thereof, which can improve power efficiency by utilizing a triboelectric effect according to an embodiment of the disclosure, will be described in detail.

[0069] The water electrolysis system 200 according to the disclosure includes a tube having a triboelectric effect to secure additional power so that power efficiency can be improved.

[0070] The main power supply part 210 can supply power (or voltage) to the water electrolysis stack 220.

[0071] As Figure 1As illustrated, the water electrolysis stack 220 has a structure in which the separator 114 is disposed between the anode 112 and the cathode 113.

[0072] The circulator 230 can include a water tank and a circulation pump to be implemented so that water is supplied and discharged in the water electrolysis stack 220.

[0073] The circulator 230 can include a circulation filter for filtering water discharged from the anode 211.

[0074] The hydrogen storage part 240 can include a gas / liquid separator to separate hydrogen from fluid discharged from the cathode and then store the separated hydrogen in a provided hydrogen tank.

[0075] The contact electrification pipe part 250 can be designed and implemented to have a triboelectric effect to secure additional power. The contact electrification pipe part 250 will be described later. Figures 3 to 5 The detailed configuration and features of the contact electrification pipe part 250 will become more apparent through the description of FIGS. 2 and 3.

[0076] The contact electrification power conversion part 260 can rectify power generated by the contact electrification pipe part 250 to convert the rectified power into power required to drive the water electrolysis stack 220.

[0077] As described above, the water electrolysis system 200 according to the disclosure can generate additional power through the contact electrification pipe part 250 and use it as additional power to drive the water electrolysis stack 220 to improve the power efficiency of the system.

[0078] Figure 3 FIG. 1 is a view illustrating a structure and operation of a water electrolysis system according to an embodiment of the disclosure.

[0079] Referring to Figure 3 , the water electrolysis system 300 can include an electrolysis stack 310, a water tank 320, a circulator 330, a gas / liquid separator 340, a hydrogen tank 350, first and second contact electrification pipes 360 and 370, a third pipe 380, and an additional power supply line 390.

[0080] The electrolysis stack 310 can include a power source 311, an anode 312, a cathode 313, a separator (membrane) 314, first and second catalytic plates 315 and 316, and a power converter 317.

[0081] In an embodiment, the first and second contact electrification pipes 360 and 370 can be implemented to have a triboelectric effect, and sides of the first and second contact electrification pipes 360 and 370 can be connected to the anode 312, while opposite sides of the first and second contact electrification pipes 360 and 370 can be connected to the circulator 330.

[0082] For example, a tube of a material (such as polytetrafluoroethylene (PTFE)) having a higher coefficient of friction than that of a general tube can be used for the first contactor 360 and the second contactor 370, but the present disclosure is not limited thereto, and a tube of a material of polydimethylsiloxane (PDMS) or polyethylene (PE) having a higher or lower coefficient of friction can be used according to the design of one of ordinary skill in the art.

[0083] A double electric layer is formed due to friction generated by the inner wall of the tube as water flows into the first contactor 360 and the second contactor 370. By winding a conductive material (for example, copper, aluminum, etc.) at a certain interval around the outer wall of the first contactor 360 and the second contactor 370, an AC voltage is generated as the triboelectricity is generated and disappears. The generated AC voltage can be transmitted to the power converter 317 through the additional power supply line 390 to be converted into a DC voltage by an internal rectifier, and then serve as an additional power supply of the electrolysis stack 310.

[0084] The third tube 380 can be implemented as a general tube having no triboelectric effect, and one side of the third tube 380 can be connected to the cathode 313 and the opposite side of the third tube 380 can be connected to the gas / liquid separator 340.

[0085] The circulator 330 can control water stored in the water tank 320 to be continuously supplied to the anode 312 of the electrolysis stack 310 through the first tube 360 by driving a set circulation pump (not shown), and when the water supplied to the anode 312 circulates and is introduced through the second tube 370, it can pass through a set filter (not shown) to supply purified water to the water tank 320.

[0086] Water flowing through the second tube 370 includes a large amount of oxygen, and the circulator 330 according to the embodiment can further include a gas / liquid separator for removing oxygen contained in water introduced through the second tube 370 and supplying the water to the water tank 320.

[0087] Water introduced into the anode 312 can be supplied to the cathode 313 through the separator 314.

[0088] In the anode 312, when a voltage above a certain voltage is applied from the power source 311 after the filtered water is supplied, the water is electrolyzed to generate oxygen molecules (O 2 ) and hydrogen ions (H - ) are generated by electrolysis in the anode 312, the ions can be transmitted through the separator 314.

[0089] In the cathode 313, hydrogen ions introduced from the anode 312 through the separator 314 are coupled to electrons to form hydrogen molecules (H 2 ].

[0090] The gas / liquid separator 340 can separate pure hydrogen gas from the fluid (water and hydrogen gas) introduced through the third tube 380 and supply the separated hydrogen gas to the hydrogen tank 350. In one embodiment, the separated water can be discharged to the outside in the form of water vapor. In another embodiment, the water (or water vapor) can be cooled and then returned to the circulator 330 for recirculation through a separate tube.

[0091] The electrons (e(-)) generated in the first tube 360 and the second tube 370 can be supplied to the power converter 317 of the electrolysis stack 310 through an additional power supply line 390.

[0092] The power converter 317 can rectify the power through a rectifier provided and convert the rectified power into a required power to supply additional power to the power source 311.

[0093] As described above, the water electrolysis system 300 according to the present disclosure can improve power efficiency by designing water that constantly circulates around the anode 312 to flow through the contactor tube to generate and supply continuous additional power to the power source 311 in the electrolysis stack 310.

[0094] Figures 4 to 5 is a view showing a structure of a contactor tube according to an embodiment of the present disclosure and a process of forming a double electric layer in the tube by friction.

[0095] Referring to Figure 4 , reference numeral 410 shows a cross section of the contactor tube 360 and the contactor tube 370, and reference numeral 420 shows a longitudinal section of the contactor tube 360 and the contactor tube 370.

[0096] Referring to reference numeral 410, the contactor tube 360 and the contactor tube 370 can include an inner non-conductive layer 412 and an outer conductive layer 411.

[0097] The non-conductive layer 412 can be formed of a non-conductive material having a high coefficient of friction, and the conductive layer 411 can be formed of a well-conductive material.

[0098] The conductive layer 411 according to the embodiment can be formed by winding an electric wire around the non-conductive layer 412 in the form of a coil.

[0099] When water flows along the inner wall of the non-conductive layer 412, friction occurs in the area where the non-conductive layer 412 contacts the water, and thus, the electric double layer 413 can be formed. That is, the electric double layer 413 can be formed with a water interface between the inner wall of the contact electrolysis tube 360 and the contact electrolysis tube 370 and the electric double layer 413.

[0100] In this case, the electrons (e(-)) of the electric double layer 413 are transferred to the load 440 through the electric wire 430 connected to one side of the conductive layer 411, and thus, power can be supplied to the load 440.

[0101] For example, as shown in reference numeral 510 of the drawing, the conductive layer 411 can be alternately arranged at regular intervals along the outer wall of the non-conductive layer 412, and in this case, as shown in reference numeral 520, the conductive layer 411 can continuously form a voltage as water flows with polarity. Figure 5

[0102] As described above, the present disclosure can improve the power efficiency of a water electrolysis system by utilizing electrostatic force between a contact electrolysis tube and a working fluid as water electrolysis power.

[0103] Figure 6 is a flowchart illustrating a method for improving the efficiency of a water electrolysis system according to an embodiment of the present disclosure.

[0104] Referring to Figure 3 and Figure 6 , the water electrolysis system 300 can continuously supply water to the anode 312 of the electrolysis stack 310 through the first contact electrolysis tube 360 (S610).

[0105] The water electrolysis system 300 can apply a voltage to the anode 312 and the cathode 313 of the electrolysis stack 310 through the power source 311 (S620).

[0106] The water electrolysis system 300 can recover a fluid discharged from the anode 312 through the second contact electrolysis tube 370 (S630). Here, the fluid includes water and oxygen.

[0107] The water electrolysis system 300 can supply power generated by the first and second contact electrolysis tubes 360 and 370 to the power source 311 by using the triboelectric effect (S640). Here, the power generated by the first and second contact electrolysis tubes 360 and 370 can be AC power, and the water electrolysis system 300 can convert the AC power generated by the first and second contact electrolysis tubes 360 and 370 into DC power through the power converter 317 provided, and can supply the DC power to the power source 311.

[0108] Figure 7 A computing device according to an embodiment of the present disclosure is illustrated. ​

[0109] Referring to Figure 7 The computing system 700 can include at least one processor 720, a memory 730, at least one of a user interface input device 740, a user interface output device 750, a storage device 760, and a network interface 770 connected to each other through a bus 810.

[0110] The processor 720 can be a central processing unit (CPU) or a semiconductor device that processes instructions stored in the memory 730 and / or the storage device 760. The memory 730 and the storage device 760 can include various types of volatile or non-volatile storage media. For example, the memory 730 can include read-only memory (ROM) 731 and random access memory (RAM) 732.

[0111] Therefore, the operations of a method (or a procedure) or an algorithm described in connection with the embodiments disclosed in the specification can be embodied directly in hardware modules, software modules, or a combination of hardware modules and software modules by the processor 720. The software modules can reside in a storage medium (i.e., the memory 730 and / or the storage device 760) such as RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, a removable disk, and CD-ROM. As an example, the processor 720 can constitute a part of the water electrolysis system described above.

[0112] The storage medium can be coupled to the processor 720, and the processor 720 can read information from the storage medium and can write information into the storage medium. Alternatively, the storage medium can be integrated with the processor 720. The processor and the storage medium can reside in an application-specific integrated circuit (ASIC). The ASIC can reside in a controller of the vehicle. Alternatively, the processor 720 and the storage medium can reside in the controller of the vehicle as separate components.

[0113] The present disclosure can provide a method for improving the efficiency of a water electrolysis system and a system thereof.

[0114] In addition, according to the present disclosure, by designing a pipe for water circulation in a water electrolysis system having a structure that can utilize a triboelectric effect, by utilizing additional power generated through circulation of water, power efficiency of hydrogen production can be improved.

[0115] In addition, the present disclosure can provide a water electrolysis system that can continuously generate additional power by applying a contact electrochemical pipe as a pipe of an anode, allowing water to continuously circulate through the pipe of the anode in the water electrolysis system.

[0116] In addition, the present disclosure can provide a water electrolysis system capable of reducing the cost of hydrogen production.

[0117] Furthermore, various effects can be provided by the present disclosure directly or indirectly.

[0118] The above description is merely an example of the technical concept of the present disclosure, and various modifications and changes can be made by those skilled in the art without departing from the essential characteristics of the present disclosure.

[0119] Accordingly, the embodiments of the present disclosure are intended to illustrate the technical concept of the present disclosure, rather than to limit the technical concept of the present disclosure. The scope and spirit of the present disclosure should not be limited by the above-described embodiments. Rather, the scope of protection of the present disclosure should be defined by the appended claims and all equivalents thereto, and all modifications and changes thereto should be construed as falling within the scope of the present disclosure.

Claims

1. A water electrolysis system, comprising: Electrolytic reactor; The power source is configured to supply voltage to the anode and cathode of the electrolytic reactor; as well as A contact electrochemical tube is connected to the anode, allowing fluid to circulate within the contact electrochemical tube. The fluid contains at least water, and the electricity generated in the contact electrochemical tube is supplied to the power source.

2. The water electrolysis system according to claim 1, wherein, The contact electrochemical tube includes: an inner non-conductive layer in contact with the fluid and one or more conductive layers disposed around the non-conductive layer.

3. The water electrolysis system according to claim 2, wherein, The non-conductive layer is formed of any material selected from the group consisting of: polytetrafluoroethylene, polydimethylsiloxane, and polyethylene.

4. The water electrolysis system according to claim 2, wherein, The one or more conductive layers are formed from materials selected from the group consisting of aluminum and copper.

5. The water electrolysis system according to claim 2, wherein, The one or more conductive layers are arranged alternately at regular intervals around the non-conductive layers.

6. The water electrolysis system according to claim 2, wherein, The one or more conductive layers are formed by winding wires into coils around the periphery of the non-conductive layers.

7. The water electrolysis system according to claim 1, wherein, The electrolytic reactor also includes a power converter configured to convert alternating current (AC) power generated in the contact electrochemical tubes into direct current (DC) power. The DC power is supplied to the power source as supplementary power.

8. The water electrolysis system according to claim 1, wherein, As the fluid flows, an electrical double layer is formed between the fluid and the contact electrochemical tube to generate electricity.

9. The water electrolysis system according to claim 1, further comprising: A circulator is configured to continuously supply the fluid to the anode via a pump connected to the contact electrochemical tube, and to filter the fluid discharged from the anode to store the fluid in a tank.

10. The water electrolysis system according to claim 1, further comprising: A gas / liquid separator is configured to separate hydrogen from the fluid discharged from the cathode; The third tube is arranged between the cathode and the gas / liquid separator; as well as Hydrogen tanks are configured to store separated hydrogen.

11. A method for improving the efficiency of a water electrolysis system, the method comprising: A fluid containing at least water is continuously supplied to the anode of the electrolytic reactor through the first contact electrochemical tube; A voltage is applied to the anode and cathode of the electrolytic reactor using a power source; The fluid discharged from the anode is recovered through the second contact electrochemical tube; and Using the triboelectric effect generated from the circulation of the fluid, the electricity generated in the first and second contact electrification tubes is supplied to the power source as additional power to the electrolytic reactor.

12. The method according to claim 11, wherein, The first contact electrification tube and the second contact electrification tube each include: an inner non-conductive layer in contact with the fluid and one or more conductive layers disposed around the non-conductive layer.

13. The method according to claim 12, wherein, The non-conductive layer is formed of any material selected from the group consisting of: polytetrafluoroethylene, polydimethylsiloxane, and polyethylene.

14. The method according to claim 12, wherein, The one or more conductive layers are formed from materials selected from the group consisting of aluminum and copper.

15. The method according to claim 12, wherein, The one or more conductive layers are arranged alternately at regular intervals around the non-conductive layers.

16. The method according to claim 12, wherein, The one or more conductive layers are formed by winding wires into coils around the periphery of the non-conductive layers.

17. The method according to claim 11, wherein, The electrolytic reactor also includes a power converter configured to convert alternating current generated in the first and second contact electrification tubes into direct current power, and the direct current power is used as additional power for the electrolytic reactor.

18. The method according to claim 11, wherein, As the fluid flows, a double layer is formed between the fluid and the first and second contact electrification tubes to generate electricity.

19. The method of claim 11, further comprising: The recovered fluid is filtered to store it in a water tank.

20. The method according to claim 11, wherein, The fluid supplied to the anode passes through a separator disposed in the electrolytic reactor to be supplied to the cathode, and The method further includes: Hydrogen gas is separated from the fluid discharged from the cathode; and The separated hydrogen is stored in a hydrogen tank.

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