A system for heating and keeping warm hydrogen and pure water produced by proton exchange membrane electrolysis of water (PEM) using photovoltaic power generation

Abstract

The utility model relates to proton exchange membrane electrolytic water hydrogen production technology field, specifically provides a kind of system for heating and keeping warm of hydrogen production pure water of proton exchange membrane electrolytic water PEM using photovoltaic power generation, including proton exchange membrane electrolytic cell and the water tank for storing and supplying pure water for electrolysis, and the water tank has heat preservation function to maintain the temperature of pure water in it, further including gas-water separator connected with the gas outlet of the proton exchange membrane electrolytic cell, for separating water in the gas generated by electrolysis, further including photovoltaic module, for converting solar energy into direct current power, further including electric heating component, setting in the water tank or on the pipeline that is connected with the water tank, for heating pure water flowing through or stored in the water tank. The utility model directly supplies power for hydrogen production pure water heating and keeping warm using solar energy, effectively reduces system electric energy loss and energy consumption, maintains temperature stability, improves response rate, and has the advantages of green environmental protection.

Description

Technical Field

[0001] This utility model belongs to the field of proton exchange membrane electrolysis water production technology, specifically relating to a system that uses photovoltaic power generation to heat and maintain the temperature of pure water produced by proton exchange membrane electrolysis (PEM) hydrogen production. Background Technology

[0002] With social and economic development, clean and renewable energy is a new approach for global sustainable development. Hydrogen production through water electrolysis is gradually becoming an important field. Existing technologies include high-temperature solid oxide electrolysis, alkaline electrolysis, and proton exchange membrane (PEM) electrolysis. Among these, PEM electrolysis offers advantages such as high hydrogen pressure, high current density, and high response rate.

[0003] However, existing PEM hydrogen production equipment still suffers from high hydrogen production costs and significant energy losses. In the PEM hydrogen production process, the electrolyzer needs to operate within a specific optimal temperature range to achieve high efficiency. Therefore, existing PEM hydrogen production equipment is typically equipped with an insulated heat exchanger containing heating devices (such as electric heaters) to heat the pure water supplied to the electrolyzer and maintain it within this optimal temperature range. Currently, these heating devices mainly rely on external grid power or a portion of the equipment's own power, resulting in high overall energy consumption, a large heat loss rate, and increased operating costs. Furthermore, the response rate of the heating system during equipment startup or temperature fluctuations limits the rapid startup and regulation performance of the overall hydrogen production system. Therefore, reducing heat loss in PEM hydrogen production equipment, decreasing energy consumption, and improving the system's temperature response rate are urgent problems to be solved. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a system that utilizes photovoltaic power generation to heat and maintain the temperature of pure water produced by proton exchange membrane electrolysis (PEM) hydrogen production. This system solves the following technical problems: In existing PEM hydrogen production equipment, the heating device used to maintain the pure water temperature has high energy consumption, relies on external power grids, has a large heat loss rate, and an unsatisfactory response rate. This invention provides a system that utilizes photovoltaic power generation to heat and maintain the temperature of pure water produced by PEM hydrogen production. This system effectively utilizes solar energy to provide energy for heating and maintaining the temperature of pure water, reducing power loss and overall energy consumption, maintaining system temperature stability, and improving the response rate.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) using photovoltaic power generation, comprising a proton exchange membrane electrolyzer and a water tank for storing and supplying pure water for electrolysis, wherein the water tank has a heat preservation function to maintain the temperature of the pure water inside, and further comprising: A gas-water separator connected to the gas outlet of the proton exchange membrane electrolyzer is used to separate moisture from the gas generated during electrolysis. It also includes photovoltaic modules, used to convert solar energy into direct current (DC) electricity; It also includes an electric heating component, which is installed inside the water tank or on a pipeline connected to the water tank, for heating pure water flowing through or stored in the water tank; It also includes a DCAC boost module, whose input terminal is electrically connected to the photovoltaic module, used to boost and modulate the DC power output by the photovoltaic module, and whose output terminal is electrically connected to the electric heating component to provide working power to the electric heating component; It also includes a temperature sensor, which is installed inside the water tank or at the outlet and inlet of the water tank, for detecting the temperature of the pure water; It also includes a voltage regulation module, whose signal input terminal is connected to the temperature sensor to receive temperature detection signals, and whose control output terminal is connected to the control terminal of the DCAC boost module; The voltage regulating module is configured to: generate a control signal based on the comparison result between the received temperature detection signal and the set temperature value, and output it to the control terminal of the DCAC boost module through a PID algorithm, thereby adjusting the output voltage or current of the DCAC boost module to control the heating power of the electric heating component, so that the pure water temperature in the water tank reaches and is maintained within the set range.

[0006] Preferably, the DCAC boost module is a DCAC boost converter with voltage regulation function.

[0007] Preferably, the voltage regulating module is integrated into the DCAC boost module or is a control unit independent of the DCAC boost module.

[0008] Preferably, the electric heating component is a heating wire, a heating rod, or a heating film.

[0009] Preferably, the housing of the proton exchange membrane electrolysis (PEM) hydrogen production equipment has a reserved mounting position for installing the DCAC boost module and a wiring port for connecting the power cord of the electric heating component.

[0010] Preferably, the photovoltaic module is positioned above or near the proton exchange membrane electrolysis hydrogen production equipment.

[0011] Preferably, the water tank is provided with an insulation layer on the outside, which consists of an outermost stainless steel insulation layer and a ceramic insulation layer covering the inside of the stainless steel insulation layer, for maintaining the temperature of the pure water in the water tank.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. Reduced power loss and energy consumption: Direct current converted from solar energy is used to drive electric heating components to heat and keep pure water warm after being modulated by a DCAC boost module. This significantly reduces dependence on external high-grade electrical energy such as the power grid, thereby reducing power loss and overall energy consumption in the hydrogen production process.

[0013] 2. Maintaining system temperature stability: The water tank temperature is monitored in real time by a temperature sensor, and the heating power is precisely adjusted by using a pressure regulating module for PID closed-loop control. This effectively maintains the pure water temperature within the optimal operating temperature range required by the PEM electrolyzer, improving the stability of system operation and electrolysis efficiency.

[0014] 3. Improved response rate: Photovoltaic power generation, combined with efficient DC-AC boost conversion and closed-loop temperature control, can quickly respond to changes in temperature demand. Especially during the equipment startup phase, it can heat pure water to the set temperature more quickly, shortening the system startup time.

[0015] 4. Green and environmentally friendly: Utilizing clean and renewable solar energy to provide energy for the key heating process in PEM hydrogen production reduces fossil fuel consumption and carbon emissions, making the hydrogen production process greener and more environmentally friendly. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structural principle of the system described in an embodiment of this utility model.

[0017] In the diagram: 1. Proton exchange membrane electrolyzer; 2. Water tank; 3. Photovoltaic module; 4. Electric heating component; 5. DCAC boost module; 6. Temperature sensor; 7. Gas-water separator. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] The following reference Figure 1 This application describes an embodiment of a system that uses photovoltaic power generation to heat and maintain the temperature of pure water produced by proton exchange membrane electrolysis (PEM) for hydrogen production.

[0020] A system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) using photovoltaic power generation includes a proton exchange membrane electrolyzer 1 and a water tank 2 for storing and supplying pure water for electrolysis. The water tank 2 has a heat preservation function to maintain the temperature of the pure water inside. The system also includes: A gas-water separator 7, connected to the gas outlet of the proton exchange membrane electrolyzer 1, is used to separate moisture from the gas produced by electrolysis. It also includes photovoltaic module 3, which is used to convert solar energy into direct current power; It also includes an electric heating component 4, which is installed inside the water tank 2 or on a pipeline connected to the water tank 2, for heating pure water flowing through or stored in the water tank 2; It also includes a DCAC boost module 5, whose input terminal is electrically connected to the photovoltaic module 3, used to boost and modulate the DC power output by the photovoltaic module 3, and whose output terminal is electrically connected to the electric heating component 4 to provide working power to the electric heating component 4; It also includes a temperature sensor 6, which is installed inside the water tank 2 or at the outlet and inlet of the water tank 2, for detecting the temperature of the pure water; It also includes a voltage regulation module, whose signal input terminal is connected to the temperature sensor 6 to receive the temperature detection signal, and whose control output terminal is connected to the control terminal of the DCAC boost module 5. The voltage regulating module is configured to: generate a control signal based on the comparison between the received temperature detection signal and the set temperature value, and output it to the control terminal of the DCAC boost module 5 through a PID algorithm, thereby adjusting the output voltage or current of the DCAC boost module 5 to control the heating power of the electric heating component 4, so that the pure water temperature in the water tank 2 reaches and is maintained within the set range.

[0021] Furthermore, the DCAC boost module 5 is a DCAC boost converter with voltage regulation function.

[0022] Furthermore, the voltage regulation module is either integrated into the DCAC boost module 5 or is a control unit independent of the DCAC boost module 5.

[0023] Furthermore, the electric heating component 4 is a heating wire, a heating rod, or a heating film.

[0024] In a further embodiment, the housing of the proton exchange membrane electrolysis water PEM hydrogen production equipment has reserved installation positions for installing the DCAC boost module 5 and wiring ports for connecting the power cord of the electric heating component 4.

[0025] In a further embodiment, the photovoltaic module 3 is positioned above or near the proton exchange membrane electrolysis (PEM) hydrogen production equipment.

[0026] In a further embodiment, the water tank 2 is provided with an insulation layer on the outside. The insulation layer consists of an outermost stainless steel insulation layer and a ceramic insulation layer covering the inside of the stainless steel insulation layer. This is used to maintain the temperature of the pure water in the water tank 2. The double insulation layer design makes the water tank 2 have a better insulation effect.

[0027] The specific working process of a system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) using photovoltaic power generation, in conjunction with the above embodiments, is described below: S1. Solar energy collection and power conversion: During the daily power generation period, the photovoltaic module 3 absorbs solar energy and converts the light energy into DC power output. The generated DC power is transmitted to the DCAC boost module 5. S2. Power modulation and heating start-up: DCAC boost module 5 boosts and regulates the input DC power, and outputs a stable DC voltage and current that meets the working requirements of electric heating component 4. The modulated power drives electric heating component 4 (such as heating wire) to work, converting electrical energy into heat energy. The heat energy directly heats the pure water in water tank 2 with insulation layer through heat conduction.

[0028] S3. Temperature Monitoring and Closed-Loop Control: Temperature sensor 6 monitors the pure water temperature in water tank 2 in real time and transmits the signal to the pressure regulating module. The pressure regulating module compares the actual temperature with the preset optimal PEM electrolysis temperature. If the actual temperature is lower than the set value, the pressure regulating module generates a control signal through a PID algorithm. The control signal is sent to the DCAC boost module 5 to increase its output voltage / current, thereby increasing the power of the electric heating component 4 and accelerating the rise in water temperature. If the actual temperature is close to or reaches the set value, the pressure regulating module reduces the output control signal, and the DCAC boost module 5 reduces the output voltage / current to reduce the heating power and maintain a constant water temperature. Under conditions such as changes in light intensity and fluctuations in water consumption, closed-loop control ensures that the water temperature responds quickly and remains stable within the optimal range.

[0029] S4. Constant Temperature Water Supply and High-Efficiency Hydrogen Production: Pure water heated to the optimal temperature is transported from water tank 2 to proton exchange membrane electrolyzer 1. Proton exchange membrane electrolyzer 1 uses the power of an external power source (non-photovoltaic power supply) to efficiently electrolyze the constant temperature pure water into hydrogen and oxygen. The constant temperature pure water significantly improves the electrolysis efficiency.

[0030] S5. Product processing and moisture recovery: The wet hydrogen and oxygen produced by the proton exchange membrane electrolyzer 1 enter the gas-water separator 7 through the gas outlet. The gas-water separator 7 condenses and separates the water vapor in the gas. The separated liquid water can be recycled to the water tank 2 or discharged. The dried gas is output to the downstream system to prevent moisture from corroding the pipeline and to ensure the purity of the gas.

[0031] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0032] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) using photovoltaic power generation, comprising a proton exchange membrane electrolyzer (1) and a water tank (2) for storing and supplying pure water for electrolysis, wherein the water tank (2) has a heat preservation function to maintain the temperature of the pure water therein, characterized in that, Also includes: A gas-water separator (7) connected to the gas outlet of the proton exchange membrane electrolyzer (1) is used to separate the water in the gas generated by electrolysis. It also includes photovoltaic modules (3) for converting solar energy into direct current power; It also includes an electric heating component (4), which is installed inside the water tank (2) or on a pipeline connected to the water tank (2) for heating pure water flowing through or stored in the water tank (2); It also includes a DCAC boost module (5), whose input terminal is electrically connected to the photovoltaic module (3) for boosting and modulating the DC power output by the photovoltaic module (3), and whose output terminal is electrically connected to the electric heating component (4) to provide working power to the electric heating component (4); It also includes a temperature sensor (6), which is installed inside the water tank (2) or at the outlet and inlet of the water tank (2) to detect the temperature of the pure water; It also includes a voltage regulation module, whose signal input terminal is connected to the temperature sensor (6) to receive temperature detection signals, and whose control output terminal is connected to the control terminal of the DCAC boost module (5); The voltage regulating module is configured to: generate a control signal based on the comparison result between the received temperature detection signal and the set temperature value, and output it to the control terminal of the DCAC boost module (5) through a PID algorithm, thereby adjusting the output voltage or current of the DCAC boost module (5) to control the heating power of the electric heating component (4) so ​​that the pure water temperature in the water tank (2) reaches and is maintained within the set range.

2. The system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) for hydrogen production according to claim 1, characterized in that: The DCAC boost module (5) is a DCAC boost converter with voltage regulation function.

3. The system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) for hydrogen production according to claim 1, characterized in that: The voltage regulation module is integrated within the DCAC boost module (5) or is a control unit independent of the DCAC boost module (5).

4. The system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) for hydrogen production according to claim 1, characterized in that: The electric heating component (4) is a heating wire, a heating rod, or a heating film.

5. The system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) for hydrogen production according to claim 1, characterized in that: The shell of the proton exchange membrane electrolysis water PEM hydrogen production equipment has a reserved installation position for installing the DCAC boost module (5) and a wiring port for connecting the power line of the electric heating component (4).

6. The system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) for hydrogen production according to claim 1, characterized in that: The photovoltaic module (3) is positioned above or near the proton exchange membrane electrolysis water production equipment (PEM hydrogen production equipment).

7. A system for heating and maintaining the temperature of pure water produced by proton exchange membrane electrolysis (PEM) for hydrogen production according to claim 1, characterized in that: The water tank (2) is provided with an insulation layer on the outside, which consists of an outermost stainless steel insulation layer and a ceramic insulation layer inside the stainless steel insulation layer, used to maintain the temperature of pure water in the water tank (2).

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