Photo-hydrogen coupling system configuration method and system

Abstract

The embodiment of the invention provides a light-hydrogen coupling system configuration method and system. The method comprises the following steps: acquiring the cell current of an electrolytic bath, the area of a photovoltaic panel and the solar irradiance; constructing a relational expression between the hydrogen production amount and the number of the electrolytic cells according to the cell current of the electrolytic cells; constructing an efficiency model according to the relational expression, the photovoltaic panel area, the solar irradiance and the number of the photovoltaic panels; adding constraint conditions and carrying out optimal solution on the efficiency model to obtain the number of the photovoltaic panels connected in series, the number of the photovoltaic panels connected in parallel, the number of the electrolytic cells connected in series and the number of the electrolytic cells connected in parallel; according to the number of the photovoltaic panels connected in series, the number of the photovoltaic panels connected in parallel, the number of the electrolytic cells connected in series and the number of the electrolytic cells connected in parallel, the light-hydrogen coupling system is configured. According to the embodiment of the invention, the optimal configuration number of the photovoltaic panels and the electrolytic cells is calculated by constructing the efficiency model, and guidance is provided for the design configuration of improving the hydrogen production efficiency of the photo-hydrogen coupling system and reducing energy loss.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of photovoltaic hydrogen production, and specifically relate to a method and system for configuring a photo-hydrogen coupling system. Background Art

[0002] Using photovoltaic arrays to generate electricity for electrolyzer arrays is an important way to produce "green hydrogen", and the coupling of photovoltaic systems and electrolytic hydrogen production systems is the key to the design of photovoltaic hydrogen production systems. In the photovoltaic-hydrogen coupling system, the photovoltaic panels in the photovoltaic system convert photoelectric energy to provide the electrical energy required by the electrolyzers in the electrolytic hydrogen production system during the electrolysis process.

[0003] In the photo-hydrogen coupling system, the configuration of the number of photovoltaic panels and the number of electrolyzers directly affects the hydrogen production efficiency of the system. Under different solar irradiances and different photovoltaic panel areas, the configuration of the number of photovoltaic panels and the number of electrolyzers needs to be changed to achieve the highest hydrogen production efficiency. At present, there is no clear method to determine the optimal configuration of the photo-hydrogen coupling system. Summary of the invention

[0004] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art and provide a method and system for configuring a light-hydrogen coupling system.

[0005] One aspect of the present disclosure provides a method for configuring a light-hydrogen coupling system, wherein the light-hydrogen coupling system includes a photovoltaic panel and an electrolyzer, and the method includes:

[0006] Obtain the electrolytic cell chamber current, photovoltaic panel area and solar irradiance;

[0007] Constructing a relationship between hydrogen production and the number of electrolytic cells according to the electrolytic cell chamber current;

[0008] Constructing an efficiency model according to the relationship, the photovoltaic panel area, the solar irradiance and the number of photovoltaic panels;

[0009] Adding constraint conditions and performing optimal solution on the efficiency model to obtain the number of photovoltaic panels connected in series, the number of photovoltaic panels connected in parallel, the number of electrolytic cells connected in series, and the number of electrolytic cells connected in parallel;

[0010] The light-hydrogen coupling system is configured according to the number of the photovoltaic panels connected in series, the number of the photovoltaic panels connected in parallel, the number of the electrolyzers connected in series, and the number of the electrolyzers connected in parallel.

[0011] Furthermore, the relationship between the hydrogen production and the number of electrolyzers is:

[0012]

[0013] in, is the hydrogen production, ηf is the Faraday efficiency, N EL,S is the number of electrolytic cells connected in series, I c is the current of the electrolytic cell chamber, Z is the number of electrons involved in the electrolysis reaction, and F is the Faraday constant.

[0014] Furthermore, the efficiency model is shown in the following formula:

[0015]

[0016] Where f is the efficiency of the light-hydrogen coupling system, is the calorific value of hydrogen, is the hydrogen production, A PV is the area of ​​the photovoltaic panel, G t is the solar irradiance, N PV is the total number of photovoltaic panels.

[0017] Furthermore, the total number of photovoltaic panels N PV =N PV,S ·N PV,P ; where N PV,S is the number of photovoltaic panels connected in series, N PV,P is the number of PV panels connected in parallel.

[0018] Furthermore, the constraint condition is as follows:

[0019]

[0020] Among them, N PV,P is the number of photovoltaic panels connected in parallel, N PV,S is the number of photovoltaic panels connected in series, N EL,P is the number of electrolytic cells in parallel, N EL,S is the number of electrolytic cells connected in series, I mod is the photovoltaic panel current, V mod is the photovoltaic panel voltage, I c is the current in the electrolytic cell chamber, U c is the electrolytic cell chamber voltage.

[0021] Another aspect of the present disclosure provides a light-hydrogen coupling system configuration system, the light-hydrogen coupling system comprising a photovoltaic panel and an electrolyzer, the configuration system comprising:

[0022] An acquisition module is used to obtain the current of the electrolytic cell chamber, the area of ​​the photovoltaic panel and the solar irradiance;

[0023] A construction module is used to construct a relationship between hydrogen production and the number of electrolyzers according to the current of the electrolyzer chamber, and to construct an efficiency model according to the relationship, the photovoltaic panel area, the solar irradiance and the number of photovoltaic panels;

[0024] A solution module, used for adding constraint conditions and performing optimal solution on the efficiency model to obtain the number of photovoltaic panels connected in series, the number of photovoltaic panels connected in parallel, the number of electrolytic cells connected in series, and the number of electrolytic cells connected in parallel;

[0025] A configuration module is used to configure the light-hydrogen coupling system according to the number of the photovoltaic panels connected in series, the number of the photovoltaic panels connected in parallel, the number of the electrolyzers connected in series, and the number of the electrolyzers connected in parallel.

[0026] Furthermore, the relationship between the hydrogen production and the number of electrolyzers is:

[0027]

[0028] in, is the hydrogen production, η f is the Faraday efficiency, N EL,S is the number of electrolytic cells connected in series, I c is the current of the electrolytic cell chamber, Z is the number of electrons involved in the electrolysis reaction, and F is the Faraday constant.

[0029] Furthermore, the efficiency model is shown in the following formula:

[0030]

[0031] Where f is the efficiency of the light-hydrogen coupling system, is the calorific value of hydrogen, is the hydrogen production, A PV is the area of ​​the photovoltaic panel, G t is the solar irradiance, N PV is the total number of photovoltaic panels.

[0032] Furthermore, the total number of photovoltaic panels N PV =N PV,S ·N PV,P ; where N PV,S is the number of photovoltaic panels connected in series, N PV,P is the number of PV panels connected in parallel.

[0033] Furthermore, the constraint condition is as follows:

[0034]

[0035] Among them, N PV,P is the number of photovoltaic panels connected in parallel, N PV,S is the number of photovoltaic panels connected in series, N EL,P is the number of electrolytic cells in parallel, N EL,S is the number of electrolytic cells connected in series, I mod is the photovoltaic panel current, V mod is the photovoltaic panel voltage, Ic is the current in the electrolytic cell chamber, U c is the electrolytic cell chamber voltage.

[0036] A method and system for configuring a light-to-hydrogen coupling system in an embodiment of the present disclosure calculates the optimal configuration number of photovoltaic panels and electrolyzers in a light-to-hydrogen coupling system by constructing an efficiency model, providing guidance for the design and configuration of a light-to-hydrogen coupling system for the purpose of improving the system's hydrogen production efficiency and reducing energy loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 A schematic diagram of a flow chart of a method for configuring a light-hydrogen coupling system according to an embodiment of the present disclosure;

[0038] Figure 2 It is a structural schematic diagram of a light-to-hydrogen coupling system configuration system according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0040] In addition, the described features, structures or characteristics may be combined in one or more embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or more of the specific details, or other methods, components, devices, steps, etc. may be adopted. In other cases, known methods, devices, implementations or operations are not shown or described in detail to avoid blurring the various aspects of the present disclosure.

[0041] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0042] It should be understood that although the terms first, second, third, etc. may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another component. Therefore, the first component discussed below can be referred to as the second component without departing from the teachings of the concepts of the present disclosure. As used in this disclosure, the term "and / or" includes any one of the associated listed items and all combinations of one or more.

[0043] Those skilled in the art will appreciate that the drawings are merely schematic diagrams of example embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing the present disclosure, and therefore cannot be used to limit the protection scope of the present disclosure.

[0044] like Figure 1 As shown, an embodiment of the present disclosure provides a method for configuring a light-hydrogen coupling system, wherein the light-hydrogen coupling system includes a photovoltaic panel and an electrolyzer, and the method includes:

[0045] Step S1, obtaining the electrolytic cell chamber current, photovoltaic panel area and solar irradiance.

[0046] Specifically, the photohydrogen coupling system of this embodiment uses electrolytic cells and photovoltaic panels of the same specifications, and each electrolytic cell is connected in series or in parallel. Photovoltaic panels are components of photovoltaic modules for photoelectric conversion, and each photovoltaic panel is also connected in series or in parallel. Query the specifications of the electrolytic cell and photovoltaic panel or conduct on-site measurements to determine the current of a single electrolytic cell chamber, the area of ​​a single photovoltaic panel, and measure the solar irradiance at the site. The solar irradiance can be the average solar irradiance at the photovoltaic panel site within a certain period of time.

[0047] Step S2: constructing a relationship between hydrogen production and the number of electrolytic cells according to the electrolytic cell chamber current.

[0048] Specifically, the relationship between the hydrogen production and the number of electrolyzers is:

[0049]

[0050] in, is the hydrogen production, η f is the Faraday efficiency, N EL,S is the number of electrolytic cells connected in series, I c is the current of the electrolytic cell chamber, Z is the number of electrons involved in the electrolysis reaction, and F is the Faraday constant.

[0051] Usually, the Faraday efficiency η f =100%, the number of electrons involved in the reaction process Z = 2, and the Faraday constant F = 96485 C / mol.

[0052] Step S3, constructing an efficiency model according to the relationship, the photovoltaic panel area, the solar irradiance and the number of photovoltaic panels.

[0053] Specifically, the efficiency model is shown in the following formula:

[0054]

[0055] Where f is the efficiency of the light-hydrogen coupling system, is the calorific value of hydrogen, is the hydrogen production, A PV is the area of ​​the photovoltaic panel, G t is the solar irradiance, N PV is the total number of photovoltaic panels.

[0056] Typically, the calorific value of hydrogen Total number of photovoltaic panels N PV =N PV，S ·N PV，P , where N PV，S is the number of photovoltaic panels connected in series, N PV，P is the number of photovoltaic panels connected in parallel. Therefore, the efficiency model can also be written as follows:

[0057]

[0058] Step S4, adding constraint conditions and performing optimal solution on the efficiency model to obtain the number of photovoltaic panels connected in series, the number of photovoltaic panels connected in parallel, the number of electrolytic cells connected in series, and the number of electrolytic cells connected in parallel.

[0059] Specifically, similar to photovoltaic panels, the total number of electrolytic cells N EL =N EL，S ·N EL，P , where N EL，S is the number of electrolytic cells connected in series, N EL，P is the number of electrolytic cells connected in parallel.

[0060] The constraints added in this embodiment are:

[0061]

[0062] Among them, I PV is the output current of the photovoltaic system, I EL is the working current of the electrolytic cell, V PV is the output voltage of the photovoltaic system, V EL is the working voltage of the electrolytic cell.

[0063] The output current of the photovoltaic system I PV =N PV，P I moa , where N PV，P is the number of photovoltaic panels connected in parallel, I moa is the photovoltaic module current. The output voltage of the photovoltaic system is V PV =N PV，S V mod , where N PV，S is the number of photovoltaic panels connected in series, V moa is the photovoltaic module voltage. The working current of the electrolyzer is IEL =N EL，P I c , where N EL，P is the number of electrolytic cells in parallel, I c is the current in the electrolytic cell chamber. The working voltage of the electrolytic cell is V EL =N EL，S U c , where N EL，S is the number of electrolytic cells connected in series, U c is the electrolytic cell chamber voltage.

[0064] The relationship between the voltage and current of the electrolytic cell is shown as follows:

[0065]

[0066] Among them, U rev is the reversible voltage of the electrolytic cell, T cell is the electrolyte temperature, A cell is the electrode area, r1, r2, s, t1, t2, and t3 are all constant factors.

[0067] Therefore, the constraints can be written as follows:

[0068]

[0069] Among them, N PV，P is the number of photovoltaic panels connected in parallel, N PV，S is the number of photovoltaic panels connected in series, N EL，P is the number of electrolytic cells in parallel, N EL，S is the number of electrolytic cells connected in series, I mod is the photovoltaic panel current, V moa is the photovoltaic panel voltage, I c is the current in the electrolytic cell chamber, U c is the electrolytic cell chamber voltage.

[0070] Taking the highest efficiency of the light-hydrogen coupling system as the optimization goal, the above efficiency model is solved using meta-heuristic algorithms, such as genetic algorithms, to obtain the number of photovoltaic panels connected in series, N PV，S 、Number of photovoltaic panels in parallel PV，P 、Number of electrolytic cells connected in series EL，S and the number of electrolytic cells in parallel N EL，P This is the configuration number with the highest efficiency.

[0071] Step S5, configuring a light-hydrogen coupling system according to the number of the photovoltaic panels connected in series, the number of the photovoltaic panels connected in parallel, the number of the electrolyzers connected in series, and the number of the electrolyzers connected in parallel.

[0072] Specifically, the number of photovoltaic panels, i.e., photovoltaic modules, and electrolyzers in the light-to-hydrogen coupling system is configured according to the optimal number calculated in the above steps to maximize the efficiency of hydrogen production by electrolysis in the light-to-hydrogen coupling system.

[0073] A method for configuring a light-to-hydrogen coupling system in an embodiment of the present disclosure calculates the optimal configuration number of photovoltaic panels and electrolyzers in a light-to-hydrogen coupling system by constructing an efficiency model, providing guidance for the design and configuration of a light-to-hydrogen coupling system for the purpose of improving the system's hydrogen production efficiency and reducing energy loss.

[0074] like Figure 2 As shown, another embodiment of the present disclosure provides a light-hydrogen coupling system configuration system, the light-hydrogen coupling system includes a photovoltaic panel and an electrolyzer, and the configuration system includes:

[0075] An acquisition module 210 is used to acquire the current of the electrolytic cell chamber, the area of ​​the photovoltaic panel and the solar irradiance;

[0076] A construction module 220 is used to construct a relationship between hydrogen production and the number of electrolytic cells according to the current of the electrolytic cell chamber, and to construct an efficiency model according to the relationship, the photovoltaic panel area, the solar irradiance and the number of photovoltaic panels;

[0077] A solution module 230, for adding constraints and performing optimal solution on the efficiency model to obtain the number of photovoltaic panels connected in series, the number of photovoltaic panels connected in parallel, the number of electrolytic cells connected in series, and the number of electrolytic cells connected in parallel;

[0078] The configuration module 240 is used to configure the light-hydrogen coupling system according to the number of the photovoltaic panels connected in series, the number of the photovoltaic panels connected in parallel, the number of the electrolyzers connected in series, and the number of the electrolyzers connected in parallel.

[0079] Exemplarily, the relationship between the hydrogen production and the number of electrolyzers is:

[0080]

[0081] in, is the hydrogen production, η f is the Faraday efficiency, N EL，S is the number of electrolytic cells connected in series, I c is the current of the electrolytic cell chamber, Z is the number of electrons involved in the electrolysis reaction, and F is the Faraday constant.

[0082] Exemplarily, the efficiency model is shown as follows:

[0083]

[0084] Where f is the efficiency of the light-hydrogen coupling system, is the calorific value of hydrogen, is the hydrogen production, A PV is the area of ​​the photovoltaic panel, G t is the solar irradiance, N PV is the total number of photovoltaic panels.

[0085] Exemplarily, the total number of photovoltaic panels N PV =N PV，S ·N PV，P ; where N PV，S is the number of photovoltaic panels connected in series, N PV，P is the number of PV panels connected in parallel.

[0086] Exemplarily, the constraint condition is as follows:

[0087]

[0088] Among them, N PV，P is the number of photovoltaic panels connected in parallel, N PV，S is the number of photovoltaic panels connected in series, N EL，P is the number of electrolytic cells in parallel, N EL，S is the number of electrolytic cells connected in series, I mod is the photovoltaic panel current, V mod is the photovoltaic panel voltage, I c is the current in the electrolytic cell chamber, U c is the electrolytic cell chamber voltage.

[0089] Specifically, a light-to-hydrogen coupling system configuration system in an embodiment of the present disclosure is used to implement the light-to-hydrogen coupling system configuration method described in the above embodiment. The specific implementation process has been described in detail in the above embodiment and will not be repeated herein.

[0090] A light-to-hydrogen coupling system configuration system of an embodiment of the present disclosure calculates the optimal configuration number of photovoltaic panels and electrolyzers in a light-to-hydrogen coupling system by constructing an efficiency model, providing guidance for the design and configuration of the light-to-hydrogen coupling system for the purpose of improving the system's hydrogen production efficiency and reducing energy loss.

[0091] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A method for configuring a light-hydrogen coupling system, wherein the light-hydrogen coupling system comprises a photovoltaic panel and an electrolyzer, characterized in that: The method comprises: Obtain the electrolytic cell chamber current, photovoltaic panel area and solar irradiance; Constructing a relationship between hydrogen production and the number of electrolytic cells according to the electrolytic cell chamber current; Constructing an efficiency model according to the relationship, the photovoltaic panel area, the solar irradiance and the number of photovoltaic panels; Adding constraint conditions and performing optimal solution on the efficiency model to obtain the number of photovoltaic panels connected in series, the number of photovoltaic panels connected in parallel, the number of electrolytic cells connected in series, and the number of electrolytic cells connected in parallel; The light-hydrogen coupling system is configured according to the number of the photovoltaic panels connected in series, the number of the photovoltaic panels connected in parallel, the number of the electrolyzers connected in series, and the number of the electrolyzers connected in parallel.

2. The method according to claim 1, characterized in that The relationship between the hydrogen production and the number of electrolyzers is: in, is the hydrogen production, η f is the Faraday efficiency, N EL,S is the number of electrolytic cells connected in series, I c is the current of the electrolytic cell chamber, Z is the number of electrons involved in the electrolysis reaction, and F is the Faraday constant.

3. The method according to claim 2, characterized in that The efficiency model is shown as follows: Where f is the efficiency of the light-hydrogen coupling system, is the calorific value of hydrogen, is the hydrogen production, A PV is the area of ​​the photovoltaic panel, G t is the solar irradiance, N PV is the total number of photovoltaic panels.

4. The method according to claim 3, characterized in that The total number of photovoltaic panels N PV =N PV,S ·N PV,P ; where N PV,S is the number of photovoltaic panels connected in series, N PV,P is the number of PV panels connected in parallel.

5. The method according to claim 4, characterized in that The constraint condition is as follows: Among them, N PV,P is the number of photovoltaic panels connected in parallel, N PV,S is the number of photovoltaic panels connected in series, N EL,P is the number of electrolytic cells in parallel, N EL,S is the number of electrolytic cells connected in series, I mod is the photovoltaic panel current, V mod is the photovoltaic panel voltage, I c is the current in the electrolytic cell chamber, U c is the electrolytic cell chamber voltage.

6. A light-hydrogen coupling system configuration system, the light-hydrogen coupling system comprising a photovoltaic panel and an electrolyzer, characterized in that: The configuration system comprises: An acquisition module is used to obtain the current of the electrolytic cell chamber, the area of ​​the photovoltaic panel and the solar irradiance; A construction module is used to construct a relationship between hydrogen production and the number of electrolyzers according to the current of the electrolyzer chamber, and to construct an efficiency model according to the relationship, the photovoltaic panel area, the solar irradiance and the number of photovoltaic panels; A solution module, used for adding constraint conditions and performing optimal solution on the efficiency model to obtain the number of photovoltaic panels connected in series, the number of photovoltaic panels connected in parallel, the number of electrolytic cells connected in series, and the number of electrolytic cells connected in parallel; A configuration module is used to configure the light-hydrogen coupling system according to the number of the photovoltaic panels connected in series, the number of the photovoltaic panels connected in parallel, the number of the electrolyzers connected in series, and the number of the electrolyzers connected in parallel.

7. The configuration system according to claim 6, characterized in that: The relationship between the hydrogen production and the number of electrolyzers is: in, is the hydrogen production, η f is the Faraday efficiency, N EL,S is the number of electrolytic cells connected in series, I c is the current of the electrolytic cell chamber, Z is the number of electrons involved in the electrolysis reaction, and F is the Faraday constant.

8. The configuration system according to claim 7, characterized in that: The efficiency model is shown as follows: Where f is the efficiency of the light-hydrogen coupling system, is the calorific value of hydrogen, is the hydrogen production, A PV is the area of ​​the photovoltaic panel, G t is the solar irradiance, N PV is the total number of photovoltaic panels.

9. The configuration system according to claim 8, characterized in that: The total number of photovoltaic panels N PV =N PV,S ·N PV,P ; where N PV,S is the number of photovoltaic panels connected in series, N PV,P is the number of PV panels connected in parallel.

10. The configuration system according to claim 9, characterized in that: The constraint condition is as follows: Among them, N PV,P is the number of photovoltaic panels connected in parallel, N PV,S is the number of photovoltaic panels connected in series, N EL,P is the number of electrolytic cells in parallel, N EL,S is the number of electrolytic cells connected in series, I mod is the photovoltaic panel current, V mod is the photovoltaic panel voltage, I c is the current in the electrolytic cell chamber, U c is the electrolytic cell chamber voltage.

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