Modular hydrogen production and storage system based on BIPV (building integrated photovoltaics)

Abstract

The utility model relates to a modular hydrogen production and storage system based on a building integrated photovoltaics (BIPV), which belongs to the technical field of hydrogen energy application and comprises a photovoltaic power generation module, a hydrogen production and storage module, a hydrogen application module and a system control module. The system control module is respectively connected with the photovoltaic power generation module, the hydrogen production and storage module and the hydrogen application module; the photovoltaic power generation module is connected with the hydrogen production and storage module and the hydrogen application module; the hydrogen preparation and storage module is connected with the hydrogen application module; the photovoltaic power generation module comprises a BIPV solar cell module, an energy storage battery pack and an inverter. And the BIPV solar cell module is connected with the energy storage battery pack and the inverter. According to the utility model, hydrogen production, storage and use are combined with the building integrated photovoltaic system, the use of energy is optimized, the energy efficiency is improved, meanwhile, the modularization is convenient for maintenance and possible upgrading, and the overall reliability of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen energy application, in particular to a modular hydrogen production and storage system based on BIPV. Background Art

[0002] Existing hydrogen preparation, storage and utilization technologies have made certain progress. However, non-modular hydrogen production and storage systems are usually simple in design and construction, and the various devices in the system cannot be fully optimized, resulting in low system energy efficiency. At the same time, non-modular equipment is usually designed and manufactured individually. Once a failure occurs, the maintenance process is relatively complicated. In addition, non-modular hydrogen production and storage equipment has poor scalability. If it is necessary to increase or decrease production capacity, it is often necessary to redesign and transform the entire system, which is costly and labor-intensive. Since non-modular hydrogen production and storage systems cannot flexibly adjust operating parameters to adapt to different application scenarios, energy waste or poor utilization efficiency occurs. There is also a risk that a partial failure will affect the operation of the entire system. Utility Model Content

[0003] In order to solve the above-mentioned problems of the prior art, the utility model provides a modular hydrogen production and storage system based on BIPV, including: a photovoltaic power generation module, a hydrogen production and storage module, a hydrogen application module and a system control module; the system control module is respectively connected to the photovoltaic power generation module, the hydrogen production and storage module and the hydrogen application module; the photovoltaic power generation module is connected to the hydrogen production and storage module and the hydrogen application module; the hydrogen production and storage module is connected to the hydrogen application module; the photovoltaic power generation module includes a BIPV solar cell module, an energy storage battery group and an inverter; the BIPV solar cell module is connected to the energy storage battery group and the inverter.

[0004] Furthermore, the BIPV solar cell module is connected to the energy storage battery group and the inverter through a junction box and a cable; the BIPV solar cell module is installed and fixed on the building surface; and the inverter is connected to the hydrogen production and storage module.

[0005] Furthermore, the hydrogen production and storage module includes a PEM hydrogen production device and a high-pressure hydrogen storage tank; the PEM hydrogen production device is connected to the high-pressure hydrogen storage tank.

[0006] Furthermore, the PEM hydrogen production device includes an electrolytic cell stack, an electrolytic water circulation pump, a water / hydrogen separation device, a thermal control subsystem and a pressure regulation subsystem which are connected in sequence.

[0007] Furthermore, the hydrogen application module includes a lithium-ion battery unit and a two-stage boost DC / DC conversion unit. The lithium-ion battery unit is used to balance power fluctuations and serve as a power source when the fuel cell is started; the two-stage boost DC / DC conversion module adjusts the output voltage to a level matching the external DC bus voltage and charges the energy storage battery pack.

[0008] Furthermore, the system control module includes a system master control, a photovoltaic power generation control subsystem, a hydrogen production and storage control subsystem, and a hydrogen application control subsystem. The system master control is connected to the photovoltaic power generation control subsystem, the hydrogen production and storage control subsystem, and the hydrogen application control subsystem. The photovoltaic power generation control subsystem manages and controls the photovoltaic power generation module; the hydrogen production and storage control subsystem manages and controls the hydrogen production and storage module; and the hydrogen application control subsystem manages and controls the hydrogen application module.

[0009] Beneficial effects of the utility model: The utility model combines hydrogen production and storage with a building-integrated photovoltaic system to optimize energy use, improve energy efficiency, and promote the application of renewable energy. The modular design allows the system to be easily expanded or reduced according to the BIPV installed capacity, and can adapt to applications of different scales and changing energy needs, from homes to commercial buildings to industrial applications. It can flexibly adapt; through pre-designed modules, the installation process can be simplified, reducing the complexity and cost of on-site installation; at the same time, modularization also facilitates maintenance and possible upgrades, improving the overall reliability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0012] Embodiment 1:

[0013] Reference Figure 1A modular hydrogen production and storage system based on BIPV, comprising: a photovoltaic power generation module, a hydrogen production and storage module, a hydrogen application module and a system control module; the system control module is respectively connected to the photovoltaic power generation module, the hydrogen production and storage module and the hydrogen application module; the photovoltaic power generation module is connected to the hydrogen production and storage module and the hydrogen application module; the hydrogen production and storage module is connected to the hydrogen application module; the photovoltaic power generation module comprises a BIPV solar cell module, an energy storage battery pack and an inverter; the BIPV solar cell module is connected to the energy storage battery pack and the inverter.

[0014] Photovoltaic power generation module: BIPV solar cell modules are used to convert solar energy into electrical energy. The appearance design of solar cell modules can be customized according to the requirements of the building facade to ensure coordination with the overall style of the building. The solar cell modules are installed on the surface of the building through the supporting structure. Junction boxes and cables are used to connect the solar cell modules and transmit electrical energy to the inverter and battery. The inverter is a key component in the modular BIPV system, which is used to convert the direct current generated by the solar cell module into alternating current. The installed power of the photovoltaic panel in the BIPV solar cell module is 80kW. Based on this, the inverter, junction box, cable, circuit breaker and other equipment are configured to match the solar cell module to form an overall photovoltaic power generation module. In order to improve the energy self-sufficiency rate, reduce dependence on the power grid, and enhance the stability and reliability of the system, a 60kWh energy storage battery pack is configured to ensure the continuity and stability of the power supply.

[0015] Hydrogen production and storage module: including PEM hydrogen production device and high-pressure hydrogen storage tank;

[0016] The PEM hydrogen production device is mainly composed of an electrolytic cell stack, an electrolytic water circulation pump, a water / hydrogen separation device, a thermal control system, a pressure control system, etc. From an economic point of view, photovoltaic power generation is given priority, especially after the photovoltaic power generation supply exceeds the grid acquisition hours. Secondly, for areas where the peak-to-valley price difference of grid electricity is large and the valley electricity price is low, hydrogen can also be produced using valley electricity at night. Taking into account the different water qualities in various regions, especially the highly alkaline and hard surface water, the water treatment and electrolysis processes in the PEM hydrogen production system are optimized and balanced to make it a wide-range, fast-response, efficient water treatment-electrolysis hydrogen production system. The rated power of the modular PEM electrolysis hydrogen production is 20kW, the hydrogen production power load range is 5%-100%, and the cold start time is within 8 minutes.

[0017] In the hydrogen production and storage module, the hydrogen compressor compresses the low-pressure hydrogen produced by the PEM hydrogen production device and stores it in the high-pressure hydrogen storage tank. It is an indispensable device. The back pressure of the PEM hydrogen production device is set to 3MPa. The hydrogen compressor compresses the produced hydrogen from 3MPa to 20MPa, and the compression ratio is about 7. A reciprocating compressor suitable for low flow and high compression ratio is selected, and its key components are made of high-pressure and corrosion-resistant materials. Due to the small compression capacity and low heat generation during the compression process, an air cooling system is used to maintain the operating temperature.

[0018] In order to integrate modular hydrogen production and storage equipment, hydrogen storage uses 20MPa high-pressure hydrogen storage tanks, which are made of carbon fiber reinforced plastic to withstand high pressure without deformation or rupture. The hydrogen storage tank is made into a cylindrical shape so that it can provide uniform stress distribution when subjected to internal pressure, and uses linear or spiral winding technology to improve its strength and pressure-bearing performance. To prevent the container from exploding under overpressure, the hydrogen storage tank is equipped with a pressure relief valve to automatically release hydrogen to ensure that the pressure is within a safe range. All pipes and connectors connecting the hydrogen storage tanks are made of materials that are compatible with hydrogen and can withstand high pressure. Two high-pressure hydrogen storage tanks are set up, each with a volume of 200L, which are integrated with the PEM hydrogen production device to form a hydrogen production and storage module.

[0019] Hydrogen application module: mainly hydrogen fuel cells, which realize combined heat and power supply for terminal loads. The hydrogen fuel cell consists of two fuel cell units, a lithium-ion battery unit and a two-stage boost DC / DC conversion module. The rated power generation of the hydrogen fuel cell is 12kW, and the rated heat generation power is about 13 kW. Under normal operating conditions, the two fuel cell units are configured as a one-main and one-standby mode to ensure the reliability of the device. Inside the fuel cell unit, the oxygen supplied by the air handling system and the hydrogen provided by the hydrogen supply system react in the reactor to generate electricity. The temperature control system is responsible for adjusting the reactor temperature to maintain the optimal operating state of the electrochemical reaction. In the power distribution system, the lithium-ion battery unit is used to balance power fluctuations and as a power source when the fuel cell is started. The two-stage boost DC / DC conversion module adjusts the output voltage to a level that matches the external DC bus voltage and charges the energy storage battery pack.

[0020] To ensure the stable operation of hydrogen fuel cells in dry, cold and harsh environmental conditions, the system uses the self-humidification mechanism of the fuel cell stack to achieve self-sufficiency in the water balance inside the electrolyte membrane. Air is directly introduced into the cathode slit plate and collector plate flow field of the fuel cell, acting as an oxidant and also playing a cooling function, thus eliminating the need for additional humidifiers and heating equipment, effectively reducing the energy consumption and maintenance costs of the system.

[0021] System control module: The control system realizes the energy and power coordination management and control functions of PEM hydrogen production, high-pressure hydrogen storage, fuel cell power generation, photovoltaics, energy storage and user loads, and collects the operating status information data of each device at the same time. Through the protection function, each subsystem is controlled to operate within a safe range, and the real-time monitoring and internal management of the entire system are realized, and it has local control and display capabilities. In the multi-energy complementary modular hydrogen storage and use system, the control system comprehensively constructs the technical system of "power generation-power storage-power use", "gas production-gas storage-gas use" and "heat production-heat management-heat utilization", fully considering the control parameters and related factors in various application scenarios, especially in dry, cold and harsh environment areas, and completes the system configuration and efficient management in a small space, so as to achieve stable and reliable operation of the system.

[0022] In the description of the embodiments of the present utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top", "bottom", "inside", "outside", "inner side", "outer side" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. Among them, "inside" refers to an internal or enclosed area or space. "Periphery" refers to the area surrounding a specific component or a specific area.

[0023] In the description of the embodiments of the present utility model, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, the meaning of "multiple" is two or more.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "assemble" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the description of the embodiments of the present invention, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0026] In the description of the embodiments of the present utility model, it should be understood that "-" and "~" represent the range between two values, and the range includes the endpoints. For example: "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0027] In the description of the embodiments of the present utility model, the term "and / or" herein is merely an association relationship of the associated objects in the modular hydrogen production and storage system based on BIPV, indicating that three relationships may exist. For example, A and / or B may represent the following three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship of the modular hydrogen production and storage system based on BIPV.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modular hydrogen production and storage system based on BIPV, characterized in that: include: Photovoltaic power generation module, hydrogen production and storage module, hydrogen application module and system control module; the system control module is respectively connected to the photovoltaic power generation module, hydrogen production and storage module and hydrogen application module; the photovoltaic power generation module is connected to the hydrogen production and storage module and the hydrogen application module; the hydrogen production and storage module is connected to the hydrogen application module; the photovoltaic power generation module includes a BIPV solar cell module, an energy storage battery pack and an inverter; the BIPV solar cell module is connected to the energy storage battery pack and the inverter.

2. A modular hydrogen production and storage system based on BIPV according to claim 1, characterized in that: The BIPV solar cell module is connected to the energy storage battery group and the inverter through a junction box and a cable; the BIPV solar cell module is installed and fixed on the surface of the building; and the inverter is connected to the hydrogen production and storage module.

3. A modular hydrogen production and storage system based on BIPV according to claim 1, characterized in that: The hydrogen production and storage module includes a PEM hydrogen production device and a high-pressure hydrogen storage tank; the PEM hydrogen production device is connected to the high-pressure hydrogen storage tank.

4. A modular hydrogen production and storage system based on BIPV according to claim 3, characterized in that: The PEM hydrogen production device comprises an electrolytic cell stack, an electrolytic water circulation pump, a water / hydrogen separation device, a thermal control subsystem and a pressure regulation subsystem which are connected in sequence.

5. The modular hydrogen production and storage system based on BIPV according to claim 3 is characterized in that: The hydrogen application module includes a lithium-ion battery unit and a two-stage boost DC / DC conversion unit. The lithium-ion battery unit is used to balance power fluctuations and serve as a power source when the fuel cell is started; the two-stage boost DC / DC conversion module adjusts the output voltage to a level matching the external DC bus voltage and charges the energy storage battery pack.

6. The modular hydrogen production and storage system based on BIPV according to claim 1, characterized in that: The system control module includes a system master control, a photovoltaic power generation control subsystem, a hydrogen production and storage control subsystem, and a hydrogen application control subsystem. The system master control is connected to the photovoltaic power generation control subsystem, the hydrogen production and storage control subsystem, and the hydrogen application control subsystem. The photovoltaic power generation control subsystem manages and controls the photovoltaic power generation module; the hydrogen production and storage control subsystem manages and controls the hydrogen production and storage module; and the hydrogen application control subsystem manages and controls the hydrogen application module.

Images