Thermoelectricity hydrogen-oxygen combined supply system

Abstract

The utility model belongs to the technical field of thermoelectric hydrogen-oxygen co-supply, and aims to provide a thermoelectric hydrogen-oxygen co-supply system and a working method thereof. The thermoelectric hydrogen-oxygen combined supply system comprises a photovoltaic power generation system, a hydrogen production system, a high-temperature proton exchange membrane fuel cell system and a heat collection system, the working method of the thermoelectric hydrogen-oxygen combined supply system comprises a daytime working method and a night working method. According to the utility model, combined supply of heat, electricity and hydrogen and oxygen for users in high-altitude areas can be realized, the stability is strong, the safety is high, the photovoltaic power generation system can be utilized to generate power in the daytime with illumination resources, and the electricity demand of buildings in the daytime can be preferably met; secondly, electrolyzed water is converted into hydrogen energy and oxygen resources to be stored; under the condition that a certain hydrogen storage scale is reached, redundant photovoltaic power is used for heating a phase change heat storage material, heat is absorbed to generate phase change to store heat, and finally the residual power is stored in an electrochemical energy storage mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal power hydrogen and oxygen cogeneration, and specifically relates to a thermal power hydrogen and oxygen cogeneration system. Background Art

[0002] High-altitude areas, especially the Tibet Autonomous Region, are extremely rich in light resources, and their industrial structure is simple, with relatively low demand for energy consumption. However, due to the seasonal migration of herders, the high mobility of personnel, and the incomplete coverage of the power grid, high-altitude areas often have problems such as frequent power outages and poor stability of power supply; at the same time, due to the relative scarcity of traditional fossil energy, the low penetration rate of pipeline natural gas and the low rate of centralized heating, some high-altitude areas generally still use traditional heating methods such as burning cow dung, resulting in poor heating conditions in winter; in terms of transportation, the air in high-altitude areas is thin and low in oxygen, resulting in a reduction in the intake volume of fuel engines and incomplete fuel combustion, which directly leads to a decrease in vehicle power and increased fuel consumption. In addition, the battery capacity of pure electric vehicles is significantly reduced in extremely cold environments, and the cruising range is significantly reduced. In addition, facing complex terrain and road conditions, the power of pure electric vehicles is still insufficient. In addition, the air in high-altitude areas is thin and low in oxygen, with an average oxygen content of only 60% of that in coastal areas, which makes residents in high-altitude areas prone to tissue and organ damage and lesions.

[0003] At present, in order to meet the demand for electricity, heating, hydrogen and oxygen in high-altitude areas, photovoltaic systems are usually used to convert the light resources in high-altitude areas into electricity and heating energy, and oxygen production equipment is used to supply oxygen. However, in the process of using the existing technology, the inventors found that there are at least the following problems in the existing technology:

[0004] The output of the photovoltaic system does not match the electricity load, and due to the problem of resource endowment, the output of photovoltaic and solar thermal will drop sharply to zero on cloudy days and at night, which means that there are still problems with the stability and continuity of electricity and heating supply during the application process; and the installation of charging piles in extremely cold areas has a long charging cycle and short driving range, which cannot meet the actual needs of local households. In addition, the existing oxygen production equipment has large losses in high-altitude areas, the cost of oxygen production is high, and the quality and performance of diffused oxygen production equipment are subject to harsh tests, making it difficult for the oxygen production equipment to maintain its service life. Utility Model Content

[0005] The utility model aims to solve the above technical problems at least to a certain extent, and provides a thermal power hydrogen and oxygen cogeneration system and a working method thereof.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, the utility model provides a thermal power and hydrogen-oxygen cogeneration system, including a photovoltaic power generation system, a hydrogen production system, a high-temperature proton exchange membrane fuel cell system and a heat collection system; the power supply end of the photovoltaic power generation system is electrically connected to the power supply line of the household building and the power receiving end of the hydrogen production system respectively; the hydrogen production system includes a proton exchange membrane water electrolysis hydrogen production module, a hydrogen storage module, an oxygen storage module and a water cooling module, the hydrogen outlet of the proton exchange membrane water electrolysis hydrogen production module is connected to the air inlet of the hydrogen storage module, the oxygen outlet of the proton exchange membrane water electrolysis hydrogen production module is connected to the air inlet of the oxygen storage module, and the oxygen outlet of the oxygen storage module is connected to the air inlet of the oxygen storage module. The outlet is connected to the oxygen supply pipeline of the user building, and the water cooling module is heat exchanged with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively; the fuel receiving end of the high-temperature proton exchange membrane fuel cell system is connected to the outlet of the hydrogen storage module, and the power supply end of the high-temperature proton exchange membrane fuel cell system is electrically connected to the power supply line of the household building; the heat collection system includes a solar collector and a hot water storage tank, the hot water storage tank is heat exchanged with the solar collector and the high-temperature proton exchange membrane fuel cell system, and the water outlet of the hot water storage tank is connected to the heating pipeline of the user building.

[0008] In one possible design, the photovoltaic power generation system includes a photovoltaic component, a first DC-DC conversion module, a second DC-DC conversion module, an electrochemical energy storage module, a voltage regulator and a first DC-AC conversion module; the power output end of the photovoltaic component is electrically connected to the input end of the first DC-DC conversion module, the output end of the first DC-DC conversion module is respectively electrically connected to the first conversion end of the second DC-DC conversion module, the input end of the voltage regulator and the input end of the first DC-AC conversion module, the second conversion end of the second DC-DC conversion module is electrically connected to the electrochemical energy storage module, the proton exchange membrane water electrolysis hydrogen production module includes an electrolysis module, the output end of the voltage regulator is electrically connected to the power receiving end of the electrolysis module, and the output end of the first DC-AC conversion module is electrically connected to the power receiving end of the proton exchange membrane water electrolysis hydrogen production module and the power receiving end of the hydrogen storage module as the power supply end of the photovoltaic power generation system.

[0009] In a possible design, the proton exchange membrane water electrolysis hydrogen production module includes an electrolysis module, a hydrogen-oxygen separation module, a hydrogen purification module and an oxygen purification module; the power receiving end of the electrolysis module and the power receiving end of the hydrogen-oxygen separation module are both electrically connected to the power supply end of the photovoltaic power generation system; the electrolysis module is connected to the hydrogen-oxygen separation module, the hydrogen outlet of the hydrogen-oxygen separation module is connected to the air inlet of the hydrogen purification module, the air outlet of the hydrogen purification module is connected to the air inlet of the hydrogen storage module, the oxygen outlet of the hydrogen-oxygen separation module is connected to the air inlet of the oxygen purification module, and the air outlet of the oxygen purification module is connected to the air inlet of the oxygen storage module; the hydrogen-oxygen separation module is heat exchanged with the water cooling module.

[0010] In one possible design, the hydrogen storage module includes a hydrogen buffer tank, a solid-state hydrogen storage module and a phase change heat storage module; the air inlet of the hydrogen buffer tank is connected to the air outlet of the hydrogen purification module as the air inlet of the hydrogen storage module, the air outlet of the hydrogen buffer tank is connected to the air inlet of the solid-state hydrogen storage module, and the air outlet of the solid-state hydrogen storage module is connected to the fuel receiving end of the high-temperature proton exchange membrane fuel cell system as the air outlet of the hydrogen storage module; the phase change heat storage module is heat exchanged with the solid-state hydrogen storage module; the power receiving end of the phase change heat storage module is electrically connected to the power supply end of the photovoltaic power generation system.

[0011] In one possible design, the water cooling module includes a cooling tower, a chilled water tank and a cooling water tank; the water outlet of the cooling tower is connected to the water inlet of the chilled water tank and the first water inlet of the cooling water tank respectively, the water outlet of the chilled water tank is connected to the second water inlet of the cooling water tank through a first heat exchange pipe, a second heat exchange pipe and a third heat exchange pipe respectively, the first heat exchange pipe is heat exchanged with the solid hydrogen storage module, the second heat exchange pipe is heat exchanged with the hydrogen purification module, the third heat exchange pipe is heat exchanged with the oxygen purification module, the cooling water outlet of the cooling water tank is connected to the water collection tank through a fourth heat exchange pipe, and the fourth heat exchange pipe is heat exchanged with the hydrogen-oxygen separation module.

[0012] In a possible design, the oxygen storage module includes an oxygen storage tank, an oxygen distributor and an indoor oxygen concentration detection system. The air inlet of the oxygen storage tank is connected to the oxygen outlet of the proton exchange membrane water electrolysis hydrogen production module as the air inlet of the oxygen storage module, the air outlet of the oxygen storage tank is connected to the air inlet of the oxygen distributor, the air outlet of the oxygen distributor is connected to the oxygen supply pipeline of the user building as the air outlet of the oxygen storage module, and the indoor oxygen concentration detection system is used to detect the oxygen concentration in different areas of the user building so that the oxygen distributor can provide diffuse oxygen supply to different areas of the user building.

[0013] In one possible design, the high-temperature proton exchange membrane fuel cell system includes a fuel receiving module, a fuel cell module, an air supply module, a cooling module and a second DC-AC conversion module; the fuel receiving end of the fuel receiving module is connected to the outlet of the hydrogen storage module as the fuel receiving end of the high-temperature proton exchange membrane fuel cell system, and the fuel supply end of the fuel receiving module is connected to the fuel receiving end of the fuel cell module; the air receiving end of the fuel cell module is connected to the air supply outlet of the air supply module, and the air supply inlet of the air supply module is connected to the outlet of the oxygen storage module; the power output end of the fuel cell module is electrically connected to the input end of the second DC-AC conversion module, and the output end of the second DC-AC conversion module is electrically connected to the power supply line of the household building as the power supply end of the high-temperature proton exchange membrane fuel cell system, and the cooling module is heat exchanged with the fuel cell module; the high-temperature proton exchange membrane fuel cell system is heat exchanged with the heat collection water tank.

[0014] In a possible design, the heat collection water storage tank includes a medium-temperature water storage tank and a high-temperature water storage tank; the water inlet of the medium-temperature water storage tank is connected to the cooling water outlet of the water cooling module, the medium-temperature water storage tank is heat exchanged with the solar collector, the water outlet of the medium-temperature water storage tank is connected to the high-temperature water storage tank through a water conduit, the water conduit is heat exchanged with the high-temperature proton exchange membrane fuel cell system, and the water outlet of the high-temperature water storage tank is connected to the heating pipe of the user building as the water outlet of the heat collection water storage tank.

[0015] In a second aspect, the utility model provides a working method of a thermal power hydrogen-oxygen cogeneration system as described in any one of the above items, including a daytime working method and a nighttime working method; wherein the daytime working method includes:

[0016] The photovoltaic power generation system converts solar energy into electrical energy so as to sequentially provide electrical energy support to the household building, the proton exchange membrane water electrolysis hydrogen production module and the phase change heat storage module in the hydrogen storage module, and the remaining electricity is stored by the electrochemical energy storage module;

[0017] The hydrogen production system, in a powered state, electrolyzes water through the proton exchange membrane water electrolysis hydrogen production module to generate hydrogen and oxygen, and stores the hydrogen and oxygen through the hydrogen storage module and the oxygen storage module, respectively, so as to provide hydrogen support to the high-temperature proton exchange membrane fuel cell system and oxygen support to household buildings at night; at the same time, the solid-state hydrogen storage module in the hydrogen storage module can also provide hydrogen energy support to hydrogen energy vehicles;

[0018] The water cooling module performs heat exchange with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively, so that the proton exchange membrane water electrolysis hydrogen production module produces hydrogen and oxygen, while the hydrogen storage module is in a hydrogen absorption state, and stores the hydrogen generated by the proton exchange membrane water electrolysis hydrogen production module in the form of a compound in the hydrogen storage module; the water cooling module also transmits the water used for heat exchange in the hydrogen-oxygen separation module in the proton exchange membrane water electrolysis hydrogen production module to the medium-temperature water storage tank of the heat collection water storage tank in the heat collection system; at the same time, the solar collector in the heat collection system absorbs the heat energy of solar radiation, and transfers the heat energy to the medium-temperature water storage tank of the heat collection water storage tank, so as to increase the heating water temperature in the building and provide water heating support to household buildings;

[0019] The night working method comprises:

[0020] The phase change heat storage module in the hydrogen storage module is preferentially triggered so that the phase change heat storage module heats the solid-state hydrogen storage module in the hydrogen storage module to reach the hydrogen release temperature; if the heat released by the phase change heat storage material is insufficient to meet the hydrogen release temperature, the medium-temperature water storage tank is heated by an electrochemical energy storage battery to meet the hydrogen release temperature, thereby enabling the solid-state hydrogen storage module to provide hydrogen support to the high-temperature proton exchange membrane fuel cell system;

[0021] The oxygen in the oxygen storage module and the hydrogen in the hydrogen storage module respectively pass through the air supply module and the fuel receiving module in the high-temperature proton exchange membrane fuel cell system and enter the fuel cell module of the high-temperature proton exchange membrane fuel cell system to react, so that the fuel cell module generates electricity to provide nighttime electricity support to household buildings; at the same time, the water in the medium-temperature water storage tank of the hot water storage tank is heat-exchanged through the cooling module of the high-temperature proton exchange membrane fuel cell system, and the waste heat generated by the fuel cell module is transferred to the high-temperature water storage tank of the hot water storage tank, so as to increase the heating water temperature in the building three times and provide water heating support to household buildings;

[0022] The oxygen stored in the oxygen storage module provides oxygen support to the household building through the oxygen distributor and the indoor oxygen concentration detection system in the oxygen storage module, and makes real-time adjustments to maintain the oxygen concentration in the household building.

[0023] In a possible design, in case of continuous rainy weather, the night working method further includes:

[0024] The high-temperature proton exchange membrane fuel cell system receives other hydrogen-containing fuel gas through the fuel receiving module and converts it into electrical energy to provide electrical energy support to household buildings; at the same time, the water in the medium-temperature water storage tank of the hot water storage tank is heat-exchanged through the cooling module of the high-temperature proton exchange membrane fuel cell system, and the heat energy is transferred to the high-temperature water storage tank of the hot water storage tank to provide water heating guarantee for household buildings;

[0025] When there is a heating requirement during the day, the daytime working method further comprises:

[0026] The photovoltaic power generation system converts solar energy into electrical energy so as to provide electrical energy support to the household building, the proton exchange membrane water electrolysis hydrogen production module and the phase change heat storage module in sequence;

[0027] The hydrogen production system electrolyzes water through the proton exchange membrane water electrolysis hydrogen production module to generate hydrogen and oxygen when powered, and stores the hydrogen and oxygen through the hydrogen storage module and the oxygen storage module respectively, and directly supplies hydrogen from the hydrogen buffer tank in the hydrogen storage module to the high-temperature proton exchange membrane fuel cell system, so as to provide electrical energy support and water heating guarantee for household buildings.

[0028] The beneficial effects of the utility model are as follows:

[0029] The utility model can realize the combined supply of heat, electricity, hydrogen and oxygen for households in high-altitude areas. It can generate electricity by using the photovoltaic power generation system during the day when there are light resources, giving priority to meeting the electricity demand of buildings during the day; secondly, it is converted into hydrogen energy and oxygen resources for storage through water electrolysis; when a certain hydrogen storage scale is reached, the excess photovoltaic power is used to heat the phase change heat storage material, absorb heat and store heat by phase change, and finally the remaining power is stored in the form of electrochemical energy storage. At night and during the day when there are no light resources, the high-temperature proton exchange membrane fuel cell system converts hydrogen energy into electricity again, and can recover the heat released by water electrolysis to produce hydrogen, the heat generated by the heat collection system collecting light resources, and the heat generated by the high-temperature proton exchange membrane fuel cell power generation process in three levels, so as to achieve the effect of heat cascade utilization, meet the heating needs of high-altitude extremely cold areas, and solve the heating problem while supplying power to household buildings. In the case of continuous rainy weather and other conditions without light resources, the high-temperature proton exchange membrane fuel cell system can also receive other hydrogen-containing fuel gases, thereby converting them into electrical energy and thermal energy. In addition, the utility model can also provide diffuse oxygen supply for household buildings, improve the oxygen concentration in indoor air, and meet the oxygen demand in high-altitude areas; at the same time, solid-state hydrogen storage can be directly used to replace the hydrogen storage module in household hydrogen energy vehicles, effectively solving the problems of difficult fuel supply, long filling time, and short cruising range for transportation in high-altitude areas.

[0030] Specifically, during the implementation of the utility model, in the daytime when there are illumination resources, the photovoltaic power generation system can convert solar energy into electrical energy to provide electrical energy support to household buildings and the hydrogen production system; the hydrogen production system can electrolyze water through the electrolysis module to generate hydrogen and oxygen in the power-receiving state, and separate, purify and dry hydrogen and oxygen through the hydrogen-oxygen separation module, the hydrogen purification module and the oxygen purification module, and then store hydrogen and oxygen through the hydrogen storage module and the oxygen storage module respectively, so as to provide hydrogen support to the high-temperature proton exchange membrane fuel cell system and oxygen support to household buildings at night. At the same time, by utilizing the high density and safety of solid-state hydrogen storage, it can replace fuel vehicles and electric vehicles, and directly be used for household hydrogen-powered two-wheeled electric vehicles or hydrogen-powered vehicles and other hydrogen vehicles to replace hydrogen storage modules, effectively solving the problems of difficult fuel supply, long filling time and short cruising range for transportation in high-altitude areas. In addition, the heat released during the water electrolysis reaction is fully utilized, and the cooling water enters the medium-temperature water storage tank after heat exchange with the hydrogen-oxygen separation system through the fourth heat exchange pipe, thereby heating the cooling water once; the solar collector in the heat collection system can absorb the heat energy of solar radiation, and transfer the heat energy to the water in the heat collection water storage tank, thereby heating the water in the medium-temperature water storage tank for a second time; at night and during the day when there are no light resources, the phase change heat storage module in the hydrogen storage module is preferentially triggered to cause a phase change, thereby releasing heat and heating the solid-state hydrogen storage module to reach the hydrogen release temperature. If the heat released by the phase change heat storage material is not enough to make the solid hydrogen storage module reach the hydrogen release temperature, the medium-temperature water storage tank can be supplemented by an electrochemical energy storage battery to reach the hydrogen release temperature, thereby continuously providing hydrogen support for the high-temperature proton exchange membrane fuel cell system; the oxygen concentration in the air in high-altitude areas is low, and the oxygen in the oxygen storage tank is supplemented to the air supply module of the high-temperature proton exchange membrane fuel cell system, thereby increasing the oxygen concentration in the air entering the fuel cell module, effectively improving the working efficiency of the fuel cell; the high-temperature proton exchange membrane fuel cell system generates electricity through the reaction of hydrogen and oxygen, so as to provide electrical energy support to household buildings in situations such as insufficient light and insufficient electricity generated by the photovoltaic power generation system; the heat collection water storage tank in the heat collection system exchanges heat with the high-temperature proton exchange membrane fuel cell system to realize waste heat recovery during the power generation process, and heat the heating water temperature three times, thereby meeting the water heating temperature requirements of household buildings in extremely cold areas at high altitudes.In the case of continuous rainy weather and other conditions without any light resources, it is impossible to provide high-purity hydrogen supply for water electrolysis. The high-temperature proton exchange membrane fuel cell system can also receive other hydrogen-containing fuel gases such as natural gas, coke oven gas, liquid ammonia cracking gas and methanol reforming gas, without hydrogen purification, and thus convert them into electrical energy and thermal energy; if there is also a heating demand during the day, after hydrogen production, it can be directly supplied from the hydrogen buffer tank to the high-temperature proton exchange membrane fuel cell system without passing through the solid hydrogen storage module, and provide oxygen support to household buildings, so as to realize the use of hydrogen and oxygen as they are produced, thereby significantly reducing the safety risks of the multi-generation system under the premise of ensuring the multiple needs of household buildings for electricity, thermal energy and oxygen. At the same time, the oxygen storage module can provide oxygen to household buildings, monitor data through the indoor oxygen concentration detection system, and adjust the oxygen distributor in real time to maintain the oxygen concentration in the household building, ensuring that the diffuse oxygen supply in the building reaches an appropriate concentration range.

[0031] Therefore, the implementation of the utility model, by utilizing light resources to achieve cogeneration of heat, electricity, hydrogen and oxygen in high-altitude areas, can provide heat, electricity, hydrogen and oxygen support to high-altitude areas at the same time, and then transform the resource advantages of high-altitude areas into technological advantages and energy advantages, effectively reduce carbon emissions, and be beneficial to the protection of sensitive and fragile ecological environments in high-altitude areas, promote the diversified development of local industries, create more employment opportunities for society, drive the development of the regional economy, and produce good social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural schematic diagram of a thermal power hydrogen-oxygen cogeneration system in an embodiment when working during the day;

[0033] Figure 2 It is a structural schematic diagram of a thermal power hydrogen-oxygen cogeneration system in an embodiment when working at night. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the utility model will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the utility model, but does not constitute a limitation of the utility model.

[0035] Embodiment 1:

[0036] This embodiment discloses a thermal power hydrogen and oxygen cogeneration system. Figure 1 and Figure 2As shown, it includes a photovoltaic power generation system, a hydrogen production system, a high temperature proton exchange membrane fuel cell (High Temperature Proton Exchange Membrane FuelCell, HT-PEMFC) system and a heat collection system; the power supply end of the photovoltaic power generation system is electrically connected to the power supply line of the household building and the power receiving end of the hydrogen production system respectively; the hydrogen production system includes a proton exchange membrane water electrolysis hydrogen production module, a hydrogen storage module, an oxygen storage module and a water cooling module, the hydrogen outlet of the proton exchange membrane water electrolysis hydrogen production module is connected to the air inlet of the hydrogen storage module, the oxygen outlet of the proton exchange membrane water electrolysis hydrogen production module is connected to the air inlet of the oxygen storage module, the outlet of the oxygen storage module is connected to the oxygen supply pipeline of the user building, and the water cooling module is connected to the proton exchange membrane water electrolysis hydrogen production module. The heat exchange arrangement is arranged with the hydrogen storage module; the fuel receiving end of the high-temperature proton exchange membrane fuel cell system is connected with the air outlet of the hydrogen storage module, and the power supply end of the high-temperature proton exchange membrane fuel cell system is electrically connected with the power supply line of the household building; the heat collection system includes a solar collector and a hot water storage tank, and the hot water storage tank is heat-exchanged with the solar collector and the high-temperature proton exchange membrane fuel cell system. At this time, the water in the hot water storage tank can be heated in stages by the heat generated by the solar collector and the high-temperature proton exchange membrane fuel cell system, and the water outlet of the hot water storage tank is connected with the heating pipeline of the user building.

[0037] The beneficial effects of this embodiment are as follows: This embodiment can realize the combined supply of heat, electricity, hydrogen and oxygen for households in high-altitude areas, and can use the photovoltaic power generation system to generate electricity during the day when there are light resources, giving priority to meeting the electricity demand of buildings during the day; secondly, it is converted into hydrogen energy and oxygen resources for storage through water electrolysis; when a certain hydrogen storage scale is reached, the excess photovoltaic power is used to heat the phase change heat storage material, absorb heat and store heat by phase change, and finally the remaining power is stored by electrochemical energy storage. At night and during the day when there are no light resources, the high-temperature proton exchange membrane fuel cell system converts hydrogen energy into electricity again, and can recover the heat released by water electrolysis to produce hydrogen, the heat generated by the heat collection system collecting light resources, and the heat generated by the high-temperature proton exchange membrane fuel cell power generation process in three levels, so as to achieve the effect of heat cascade utilization, meet the heating needs of high-altitude extremely cold areas, and solve the heating problem while supplying power to household buildings. In the case of continuous rainy weather and other conditions without light resources, the high-temperature proton exchange membrane fuel cell system can also receive other hydrogen-containing fuel gases, thereby converting them into electrical energy and thermal energy. In addition, this embodiment can also provide diffuse oxygen supply for household buildings, improve the oxygen concentration in indoor air, and meet the oxygen demand in high-altitude areas; at the same time, solid-state hydrogen storage can be directly used to replace the hydrogen storage module in household hydrogen energy vehicles, effectively solving the problems of difficult fuel supply, long filling time, and short cruising range for transportation in high-altitude areas.

[0038] Specifically, during the implementation of this embodiment, in the daytime when there are illumination resources, the photovoltaic power generation system can convert solar energy into electrical energy to provide electrical energy support to household buildings and the hydrogen production system; the hydrogen production system can electrolyze water through the electrolysis module to generate hydrogen and oxygen in the power-receiving state, and separate, purify and dry hydrogen and oxygen through the hydrogen-oxygen separation module, the hydrogen purification module and the oxygen purification module, and then store hydrogen and oxygen through the hydrogen storage module and the oxygen storage module respectively, so as to provide hydrogen support to the high-temperature proton exchange membrane fuel cell system and oxygen support to household buildings at night. At the same time, by utilizing the high density and safety of solid-state hydrogen storage, it can replace fuel vehicles and electric vehicles, and directly be used for household hydrogen-powered two-wheeled electric vehicles or hydrogen-powered vehicles and other hydrogen vehicles to replace hydrogen storage modules, effectively solving the problems of difficult fuel supply, long filling time and short cruising range for transportation in high-altitude areas. In addition, the heat released during the water electrolysis reaction is fully utilized, and the cooling water enters the medium-temperature water storage tank after heat exchange with the hydrogen-oxygen separation system through the fourth heat exchange pipe, thereby heating the cooling water once; the solar collector in the heat collection system can absorb the heat energy of solar radiation, and transfer the heat energy to the water in the heat collection water storage tank, thereby heating the water in the medium-temperature water storage tank for a second time; at night and during the day when there are no light resources, the phase change heat storage module in the hydrogen storage module is preferentially triggered to cause a phase change, thereby releasing heat and heating the solid-state hydrogen storage module to reach the hydrogen release temperature. If the heat released by the phase change heat storage material is not enough to make the solid hydrogen storage module reach the hydrogen release temperature, the medium-temperature water storage tank can be supplemented by an electrochemical energy storage battery to reach the hydrogen release temperature, thereby continuously providing hydrogen support for the high-temperature proton exchange membrane fuel cell system; the oxygen concentration in the air in high-altitude areas is low, and the oxygen in the oxygen storage tank is supplemented to the air supply module of the high-temperature proton exchange membrane fuel cell system, thereby increasing the oxygen concentration in the air entering the fuel cell module, effectively improving the working efficiency of the fuel cell; the high-temperature proton exchange membrane fuel cell system generates electricity through the reaction of hydrogen and oxygen, so as to provide electrical energy support to household buildings in situations such as insufficient light and insufficient electricity generated by the photovoltaic power generation system; the heat collection water storage tank in the heat collection system exchanges heat with the high-temperature proton exchange membrane fuel cell system to realize waste heat recovery during the power generation process, and heat the heating water temperature three times, thereby meeting the water heating temperature requirements of household buildings in extremely cold areas at high altitudes.In the case of continuous rainy weather and other conditions without any light resources, it is impossible to provide high-purity hydrogen supply for water electrolysis. The high-temperature proton exchange membrane fuel cell system can also receive other hydrogen-containing fuel gases such as natural gas, coke oven gas, liquid ammonia cracking gas and methanol reforming gas, without hydrogen purification, and thus convert them into electrical energy and thermal energy; if there is also a heating demand during the day, after hydrogen production, it can be directly supplied from the hydrogen buffer tank to the high-temperature proton exchange membrane fuel cell system without passing through the solid hydrogen storage module, and provide oxygen support to household buildings, so as to realize the use of hydrogen and oxygen as they are produced, thereby significantly reducing the safety risks of the multi-generation system under the premise of ensuring the multiple needs of household buildings for electricity, thermal energy and oxygen. At the same time, the oxygen storage module can provide oxygen to household buildings, monitor data through the indoor oxygen concentration detection system, and adjust the oxygen distributor in real time to maintain the oxygen concentration in the household building, ensuring that the diffuse oxygen supply in the building reaches an appropriate concentration range.

[0039] Therefore, the implementation of this embodiment, by utilizing light resources to achieve cogeneration of heat, electricity, hydrogen and oxygen in high-altitude areas, can provide heat, electricity, hydrogen and oxygen support to high-altitude areas at the same time, thereby transforming the resource advantages of high-altitude areas into technological advantages and energy advantages, effectively reducing carbon emissions, and being beneficial to the protection of sensitive and fragile ecological environments in high-altitude areas, promoting the diversified development of local industries, creating more employment opportunities for society, driving the development of the regional economy, and generating good social benefits.

[0040] Specifically, in this embodiment, through the efficient use of hydrogen, a high-quality and high-grade energy source, a single fuel cell stack or a combination of multiple stacks can reach a power level of several kW to MW, which can simultaneously meet the needs of independent houses, convenience stores, independent businesses and other single-family buildings or single areas such as townhouses, small concentrated residences, etc. to provide uninterrupted electricity, winter heating, etc. In particular, off-grid photovoltaic hydrogen production is adopted, which can be independent of the power grid, and can solve the various distributed energy needs of nomadic peoples, plateau border defense forces, and scenic spots, meet their needs for heat and electricity, and solve regional energy needs.

[0041] In addition, the oxygen content in high-altitude areas is relatively low. When using proton exchange membrane to electrolyze water to produce hydrogen, high-purity oxygen is produced as a by-product. Its volume is half that of hydrogen, and it does not carry gases such as alkaline KOH and other harmful substances. It can come into direct contact with the human body. Through diffuse oxygen supply, it will effectively improve the oxygen concentration in the indoor air of household buildings at high altitudes, thereby ensuring oxygen supply and reducing oxygen costs. Diffuse oxygen supply will be popularized in public facilities and personal residences throughout the region, improving medical support in high-altitude areas, improving people's health and living standards, and promoting the development of the tourism industry.

[0042] At the same time, in terms of transportation, the thin air and low oxygen content in high-altitude areas reduce the intake of fuel engines and incomplete fuel combustion, which directly leads to a decrease in vehicle power and increased fuel consumption. In addition, the battery capacity of pure electric vehicles is significantly reduced in extremely cold environments, and the cruising range is significantly reduced. In addition, facing complex terrain conditions, the power of pure electric vehicles is still insufficient. Using solid-state hydrogen storage modules to directly replace fuel can replace fuel vehicles and electric vehicles, effectively solving the problems of difficult fuel supply, long filling time, and short cruising range in transportation in high-altitude areas, reducing carbon emissions, and reducing damage to the ecological environment in high-altitude areas.

[0043] In this embodiment, the photovoltaic power generation system includes a photovoltaic component, a first DC-DC conversion module, a second DC-DC conversion module, an electrochemical energy storage module, a voltage regulator and a first DC-AC conversion module; the power output end of the photovoltaic component is electrically connected to the input end of the first DC-DC conversion module, the output end of the first DC-DC conversion module is electrically connected to the first conversion end of the second DC-DC conversion module, the input end of the voltage regulator and the input end of the first DC-AC conversion module, the second conversion end of the second DC-DC conversion module is electrically connected to the input end / output end of the electrochemical energy storage module, the proton exchange membrane water electrolysis hydrogen production module includes an electrolysis module, the output end of the voltage regulator is electrically connected to the power receiving end of the electrolysis module, and the output end of the first DC-AC conversion module is electrically connected to the power receiving end of the proton exchange membrane water electrolysis hydrogen production module and the power receiving end of the hydrogen storage module as the power supply end of the photovoltaic power generation system. In this embodiment, the electrochemical energy storage module uses any one of a lithium-ion battery, a lead-acid battery, a sodium-sulfur battery, and a flow battery, which can store the surplus power of the photovoltaic power generation system. Specifically, in this embodiment, the output end of the first DC-AC conversion module is electrically connected to the hydrogen-oxygen separation module, the hydrogen purification module and the oxygen purification module in the proton exchange membrane water electrolysis hydrogen production module, and the power receiving end of the phase change heat storage module in the hydrogen storage module, so as to provide power support for other modules in the thermal power hydrogen-oxygen cogeneration system.

[0044] It should be understood that, in the present embodiment, a plurality of photovoltaic components may be provided, and correspondingly, the photovoltaic power generation system further includes a junction box electrically connected to the power output terminals of the plurality of photovoltaic components, for collecting the direct current generated by the plurality of photovoltaic components and transmitting it to the first DC-DC conversion module.

[0045] It should also be understood that, in this embodiment, when the output end of the first DC-AC conversion module is electrically connected to the power receiving end of the phase change heat storage module, the purpose of using the surplus power to heat the phase change heat storage material in the phase change heat storage module can be achieved, so that it absorbs heat and undergoes a phase change to a molten state, thereby storing heat.

[0046] In this embodiment, the proton exchange membrane water electrolysis hydrogen production module includes an electrolysis module, a hydrogen-oxygen separation module, a hydrogen purification module and an oxygen purification module; the power receiving end of the electrolysis module and the power receiving end of the hydrogen-oxygen separation module are both electrically connected to the power supply end of the photovoltaic power generation system; the electrolysis module is connected to the hydrogen-oxygen separation module, the hydrogen outlet of the hydrogen-oxygen separation module is connected to the air inlet of the hydrogen purification module, the air outlet of the hydrogen purification module is connected to the air inlet of the hydrogen storage module, the oxygen outlet of the hydrogen-oxygen separation module is connected to the air inlet of the oxygen purification module, and the air outlet of the oxygen purification module is connected to the air inlet of the oxygen storage module; the hydrogen-oxygen separation module is heat exchanged with the water cooling module.

[0047] It should be noted that in the present embodiment, the electric energy generated by the photovoltaic power generation system is converted into hydrogen energy for storage through PEM (Proton Exchange Membrane) electrolysis by the electrolysis module. In the process of electrolyzing water to produce hydrogen and oxygen, water vapor or oxygen may enter the hydrogen storage module, and water vapor or hydrogen may enter the oxygen storage module, resulting in the hydrogen and oxygen stored in the hydrogen storage module and the oxygen storage module being impure, affecting the subsequent hydrogen and oxygen supply quality. For this reason, a hydrogen purification module and an oxygen purification module are provided in the proton exchange membrane water electrolysis hydrogen production module of the present embodiment to achieve the purification of hydrogen and oxygen.

[0048] In this embodiment, the hydrogen storage module includes a hydrogen buffer tank, a solid-state hydrogen storage module and a phase change heat storage module; the air inlet of the hydrogen buffer tank is connected to the air outlet of the hydrogen purification module as the air inlet of the hydrogen storage module, the air outlet of the hydrogen buffer tank is connected to the air inlet of the solid-state hydrogen storage module, and the air outlet of the solid-state hydrogen storage module is connected to the fuel receiving end of the high-temperature proton exchange membrane fuel cell system as the air outlet of the hydrogen storage module; the phase change heat storage module is heat exchanged with the solid-state hydrogen storage module; the power receiving end of the phase change heat storage module is electrically connected to the power supply end of the photovoltaic power generation system. It should be understood that the setting of the water cooling module allows the solid-state hydrogen storage material to be reduced to the hydrogen charging temperature, that is, 10°C and below, which can facilitate the flow of hydrogen from the hydrogen buffer tank into the solid-state hydrogen storage module and store it in the solid-state hydrogen storage material in the solid-state hydrogen storage module. During the operation of the hydrogen production system, the hydrogen purification module and the oxygen purification module need to be cooled by the water cooling module to reduce them to a certain temperature after removing the impurity oxygen and impurity hydrogen respectively. The free water in the gas can be removed by entering the gas-water separator, and the temperature of the hydrogen-oxygen separation module needs to be always maintained within the appropriate range of 90±5°C. Based on this, in this embodiment, the heat is dissipated by the water cooling module.

[0049] In this embodiment, the solid-state storage of hydrogen is achieved through a solid-state hydrogen storage module. Compared with high-pressure gaseous and liquid hydrogen storage, the hydrogen storage density is higher, and no hydrogen compressor or insulated container is required. Moreover, since a solid hydride is formed, there is no elemental gaseous hydrogen, and there is no explosion hazard. It is highly safe when stored on a large scale around buildings, and is an ideal hydrogen storage method close to households. In addition, the high-temperature heat required for solid-state hydrogen storage is preferentially supplied by converting photovoltaic power into heat energy stored in the phase change heat storage material in the phase change heat storage module. If the heat released by the phase change heat storage material is not enough to make the solid-state hydrogen storage material reach the hydrogen release temperature, the medium-temperature water storage tank can be supplemented by an electrochemical energy storage battery to reach the hydrogen release temperature, thereby continuously providing hydrogen support for the high-temperature proton exchange membrane fuel cell system.

[0050] It should be noted that in addition to continuously supplying hydrogen to the high-temperature proton exchange membrane fuel cell system in the building, the solid-state hydrogen storage module can also take advantage of its high density and safety characteristics to be directly used in household hydrogen-powered two-wheeled electric vehicles or hydrogen-powered vehicles to replace the hydrogen storage module, thereby replacing fuel vehicles and electric vehicles, and effectively solving the problems of difficult fuel supply, long filling time and short cruising range for transportation in high-altitude areas.

[0051] Specifically, in this embodiment, the solid-state hydrogen storage material includes, but is not limited to, rare earth series, vanadium series, titanium series, and composite materials in combination of various forms.

[0052] In this embodiment, the photovoltaic power generation system can use the surplus electricity during the day to heat the phase change heat storage module, causing it to melt and store heat, so that the phase change heat storage module can undergo phase change and release heat at night when triggered, thereby heating the solid-state hydrogen storage module so that the solid-state hydrogen storage module reaches the hydrogen release temperature, i.e., 45 to 65°C, and the stored hydrogen can be released to continuously supply the high-temperature proton exchange membrane fuel cell system for power generation.

[0053] Specifically, in this embodiment, the phase change heat storage module mainly uses paraffin, which has a melting temperature of 87°C, a phase change range concentrated at 75-90°C, and a phase change latent heat of 203.9 kJ / kg.

[0054] In this embodiment, the water cooling module includes a cooling tower, a chilled water tank and a cooling water tank; the water outlet of the cooling tower is connected to the water inlet of the chilled water tank and the first water inlet of the cooling water tank respectively, the water outlet of the chilled water tank is connected to the second water inlet of the cooling water tank through the first heat exchange pipe, the second heat exchange pipe and the third heat exchange pipe respectively, the first heat exchange pipe is heat exchanged with the solid hydrogen storage module, the second heat exchange pipe is heat exchanged with the hydrogen purification module, the third heat exchange pipe is heat exchanged with the oxygen purification module, the cooling water outlet of the cooling water tank is connected to the water collection tank through the fourth heat exchange pipe as the cooling water outlet of the water cooling module, and the fourth heat exchange pipe is heat exchanged with the hydrogen-oxygen separation module. Specifically, in this embodiment, the water temperature in the chilled water tank is less than 7°C, and the water temperature in the cooling water tank is less than 32°C.

[0055] It should be noted that the setting of the water cooling module can adjust the hydrogen-oxygen separation module, hydrogen purification module, oxygen purification module and solid-state hydrogen storage module to the optimal temperature for suitable operation, and return the chilled water to the cooling water tank after heat exchange for reuse as cooling water. The medium-temperature water generated after the cooling water heat exchange is transported to the hot water storage tank and is heated multiple times before being used as hot water for building heating. This can ensure the normal and stable operation of the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module.

[0056] Specifically, in this embodiment, the water cooling module performs heat exchange with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively, so that the proton exchange membrane water electrolysis hydrogen production module produces hydrogen and oxygen at a suitable temperature, while the hydrogen storage module is in a hydrogen absorption state, and the hydrogen generated by the proton exchange membrane water electrolysis hydrogen production module is stored in the hydrogen storage module in the form of a compound. Specifically, when the water cooling module performs heat exchange with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively, the proton exchange membrane water electrolysis hydrogen production module is maintained at 90±5°C, and the solid hydrogen storage material in the solid hydrogen storage module in the hydrogen storage module is maintained at 10°C or below to achieve solid-state hydrogen storage. Compared with gaseous or liquid hydrogen storage methods, this embodiment can store a large amount of hydrogen; the water exchanged with the hydrogen-oxygen separation module in the proton exchange membrane water electrolysis hydrogen production module is then transmitted to the medium-temperature water storage tank of the heat collection water storage tank in the heat collection system; at the same time, the solar collector in the heat collection system absorbs the heat energy of solar radiation and transfers the heat energy to the medium-temperature water storage tank of the heat collection water storage tank, so as to increase the heating water temperature in the building and provide heat to the household. The building provides water heating support; specifically, the water cooling module exchanges heat with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively, including: the cooling water storage tank in the water cooling module exchanges heat with the hydrogen-oxygen separation module in the proton exchange membrane water electrolysis hydrogen production module through the fourth heat exchange pipe, so that the electrolyte temperature is maintained within the temperature range of 90±5°C, the chilled water storage tank in the water cooling module purifies and dries hydrogen and oxygen through the second heat exchange pipe and the third heat exchange pipe respectively, and the chilled water storage tank cools the hydrogen storage module through the third heat exchange pipe to 10°C or below, so that the solid hydrogen storage material in the hydrogen storage module is in a hydrogen absorption state, thereby storing a large amount of hydrogen in the form of compounds, thereby ensuring the safety of household buildings. The water used for heat exchange between the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module is transmitted to the medium-temperature water storage tank of the heat collection water storage tank in the heat collection system. The heat released in the water electrolysis reaction process is fully utilized and then enters the medium-temperature water storage tank after heat exchange with cooling water through the fourth heat exchange pipe, thereby secondary raising the heating water temperature in the building.

[0057] In this embodiment, the oxygen storage module includes an oxygen storage tank, an oxygen distributor and an indoor oxygen concentration detection system. The air inlet of the oxygen storage tank is connected to the oxygen outlet of the proton exchange membrane water electrolysis hydrogen production module as the air inlet of the oxygen storage module, the air outlet of the oxygen storage tank is connected to the air inlet of the oxygen distributor, and the air outlet of the oxygen distributor is connected to the oxygen supply pipeline of the user building as the air outlet of the oxygen storage module. The indoor oxygen concentration detection system is used to detect the oxygen concentration in different areas of the user building so that the oxygen distributor can provide diffuse oxygen supply to different areas of the user building.

[0058] It should be noted that when the proton exchange membrane water electrolysis hydrogen production module is used to electrolyze water to produce hydrogen, in addition to hydrogen and water, it also produces high-purity oxygen, and does not carry alkaline KOH and other harmful substances and other gases, which are suitable for direct contact with the human body. Based on, in this embodiment, the setting of the oxygen storage module can realize the further utilization of the oxygen generated by the proton exchange membrane water electrolysis hydrogen production module, which is suitable for the diffuse oxygen supply demand in high-altitude areas. The diffuse oxygen supply method of the oxygen distributor can facilitate the reasonable distribution of oxygen in household buildings, thereby ensuring that the indoor oxygen concentration reaches the normal concentration, ensuring oxygen supply, and improving the health and living standards of people in high-altitude areas.

[0059] In this embodiment, the high-temperature proton exchange membrane fuel cell system includes a fuel receiving module, a fuel cell module, an air supply module, a cooling module and a second DC-AC conversion module; the fuel receiving end of the fuel receiving module is connected to the outlet of the hydrogen storage module as the fuel receiving end of the high-temperature proton exchange membrane fuel cell system, and the fuel supply end of the fuel receiving module is connected to the fuel receiving end of the fuel cell module; the air receiving end of the fuel cell module is connected to the air supply outlet of the air supply module, and the air supply inlet of the air supply module is connected to the outlet of the oxygen storage module; the power output end of the fuel cell module is electrically connected to the input end of the second DC-AC conversion module, and the output end of the second DC-AC conversion module is electrically connected to the power supply line of the household building as the power supply end of the high-temperature proton exchange membrane fuel cell system, and the cooling module is heat exchanged with the fuel cell module; the high-temperature proton exchange membrane fuel cell system is heat exchanged with the hot water storage tank.

[0060] It should be noted that a fuel cell is a device that converts chemical energy directly into electrical energy. In order to meet the power supply needs of high-altitude and extremely cold areas, in this embodiment, the fuel cell module adopts HT-PEMFC (High Temperature Proton Exchange Membrane Fuel Cell), and HT-PEMFC is one of the common types. It reacts hydrogen and oxygen to generate water and electricity through a proton exchange membrane, and has the advantages of strong resistance to CO poisoning, simple water and heat management, and high energy utilization. It should be noted that when the fuel cell module adopts HT-PEMFC, its operating temperature is 120-180°C, and the medium-temperature water can be heated again. During the startup process of the fuel cell module, it can be electrically heated to reach an operating temperature of 120-180°C. After it is operating normally, part of the power generated by the fuel cell module itself is used to heat the electrolyte to maintain a normal operating temperature.

[0061] Specifically, in this embodiment, the cooling module is heat exchanged with the fuel cell module. If the temperature of the fuel cell module is too high, it can be cooled to 120-180°C by the cooling module. At the same time, the water conduit can be heat exchanged with the cooling module in the high-temperature proton exchange membrane fuel cell system so that the water in the medium-temperature water storage module can be heated by the cooling module, or the fuel cell module can be directly heat exchanged with the water conduit.

[0062] It should be understood that in this embodiment, the fuel receiving module in the high-temperature proton exchange membrane fuel cell system can also accept other hydrogen-containing fuel gases such as natural gas, coke oven gas, liquid ammonia cracking gas and methanol reforming gas, so as to provide fuel for power generation to the fuel cell module, and at the same time enable the thermal collection system to provide water heating support to household buildings. This makes this embodiment suitable for extreme special weather conditions such as continuous rainy days without light resources, and meets the diversified energy needs in household buildings.

[0063] In this embodiment, the heat collection water storage tank includes a medium-temperature water storage tank and a high-temperature water storage tank; the water inlet of the medium-temperature water storage tank is connected to the cooling water outlet of the water cooling module, specifically, the cooling water outlet of the cooling water storage tank is connected to the medium-temperature water storage tank through the fourth heat exchange pipe as the cooling water outlet of the water cooling module; the medium-temperature water storage tank is heat exchanged with the solar collector, the outlet of the medium-temperature water storage tank is connected to the high-temperature water storage tank through a water guide pipe, the water guide pipe is heat exchanged with the high-temperature proton exchange membrane fuel cell system, and the outlet of the high-temperature water storage tank is connected to the heating pipe of the user building as the outlet of the heat collection water storage tank. It should be understood that the medium-temperature water storage tank can be referred to as the first water storage tank, and the high-temperature water storage tank can also be referred to as the second water storage tank.

[0064] In this embodiment, the waste cooling water generated by the water cooling module during the operation of the hydrogen production system is collected by a medium-temperature water storage tank, so that the heat generated by the hydrogen production system in the water electrolysis process can be recycled and utilized, which is more environmentally friendly. Specifically, during the implementation of this embodiment, in order to achieve the temperature required for heating, the heat collection water storage tank can recycle the heat generated by the water electrolysis hydrogen production process, the heat collected by the solar collector, and the waste heat of the fuel cell system power generation process in a cascade manner. The specific process includes: the cooling water fully recovers the heat released by the proton exchange membrane water electrolysis hydrogen production module in the water electrolysis hydrogen production process, and the solar energy heat is exchanged through the solar collector, and the medium-temperature water temperature is heated to above 50°C in turn, and stored in the medium-temperature water storage tank. During the operation of the fuel cell system, while converting energy into electrical energy, part of the energy will also be converted into heat. At this time, the medium-temperature water in the medium-temperature water storage tank can be heated again, the water temperature is increased to 85-95°C, and stored in a high-temperature water storage tank, thereby meeting the heating needs of household buildings in high-altitude and extremely cold areas, such as introducing high-temperature water into radiators to heat user buildings and using it as user's domestic water, etc., which is not restricted here.

[0065] Embodiment 2:

[0066] This embodiment discloses a working method of a thermal power hydrogen-oxygen cogeneration system, including a daytime working method with better light resources and less electricity and heat consumption than at night, and a nighttime working method with no light resources and more electricity and heat consumption; wherein the daytime working method includes:

[0067] The photovoltaic power generation system converts solar energy into electrical energy so as to sequentially provide electrical energy support to the household building, the proton exchange membrane water electrolysis hydrogen production module and the phase change heat storage module in the hydrogen storage module, and the remaining electricity is stored by the electrochemical energy storage module;

[0068] The hydrogen production system electrolyzes water to generate hydrogen and oxygen through the proton exchange membrane water electrolysis hydrogen production module in the power-receiving state, and stores the hydrogen and oxygen through the hydrogen storage module and the oxygen storage module respectively, so as to provide hydrogen support to the high-temperature proton exchange membrane fuel cell system at night and provide oxygen support to household buildings; at the same time, the solid-state hydrogen storage module in the hydrogen storage module can also provide hydrogen energy support to hydrogen energy vehicles; specifically, the hydrogen energy vehicle is a household hydrogen energy two-wheeled electric vehicle or a hydrogen energy car. In this embodiment, the solid-state hydrogen storage module is used to provide hydrogen energy support to the hydrogen energy vehicle, which can solve the problems of difficult fuel supply, long filling time and short cruising range in high-altitude areas;

[0069] The water cooling module performs heat exchange with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively, so that the proton exchange membrane water electrolysis hydrogen production module produces hydrogen and oxygen, while the hydrogen storage module is in a hydrogen absorption state, and stores the hydrogen generated by the proton exchange membrane water electrolysis hydrogen production module in the form of a compound in the hydrogen storage module; specifically, when the water cooling module performs heat exchange with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively, the proton exchange membrane water electrolysis hydrogen production module is maintained at 90±5°C, and the solid-state hydrogen storage material in the solid-state hydrogen storage module in the hydrogen storage module is maintained at 10°C or below to achieve solid-state hydrogen storage, thereby compared with gaseous or liquid hydrogen storage methods, this embodiment can store a large amount of hydrogen; the water cooling module also transmits the water exchanged by the hydrogen-oxygen separation module in the proton exchange membrane water electrolysis hydrogen production module to the medium-temperature water storage tank of the heat collection water storage tank in the heat collection system; at the same time, the heat collection system The solar collector in the water absorbs the heat energy of solar radiation and transfers the heat energy to the medium-temperature water tank of the water collection water tank, so as to increase the heating water temperature in the building and provide water heating support for household buildings; specifically, the water cooling module exchanges heat with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively, including: the cooling water storage tank in the water cooling module exchanges heat with the hydrogen-oxygen separation module in the proton exchange membrane water electrolysis hydrogen production module through the fourth heat exchange pipeline, so that the electrolyte temperature is maintained within the temperature range of 90±5°C, the chilled water storage tank in the water cooling module purifies and dries hydrogen and oxygen through the second heat exchange pipeline and the third heat exchange pipeline respectively, and the chilled water storage tank cools the hydrogen storage module through the third heat exchange pipeline to 10°C or below, so that the solid hydrogen storage material in the hydrogen storage module is in a hydrogen absorption state, thereby storing a large amount of hydrogen in the form of compounds, thereby ensuring the safety of household buildings. The water used for heat exchange between the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module is transmitted to the medium-temperature water storage tank of the heat collection water storage tank in the heat collection system. The heat released in the water electrolysis reaction process is fully utilized and then enters the medium-temperature water storage tank after heat exchange with cooling water through the fourth heat exchange pipe, thereby secondary raising the heating water temperature in the building.

[0070] Specifically, in the daytime working method of this embodiment, the photovoltaic power generation system converts solar energy into electrical energy, and uses the electrical energy to preferentially meet the daytime electricity consumption of household buildings, and then uses the electricity not consumed by household buildings to produce hydrogen in the proton exchange membrane water electrolysis hydrogen production module, thereby storing the electricity that cannot be consumed during the day mainly through solid-state hydrogen storage to provide guarantee for power supply and heating at night; and uses the electricity not consumed by household buildings to heat the phase change heat storage module in the hydrogen storage module to put it in a molten state, and then the remaining electricity not consumed by household buildings, the proton exchange membrane water electrolysis hydrogen production module and the phase change heat storage module in the hydrogen storage module is stored through the electrochemical energy storage module in the photovoltaic power generation system. At the same time, during the hydrogen production process of the hydrogen production system, the water cooling module performs cooling water heat exchange on the hydrogen-oxygen separation module of the proton exchange membrane water electrolysis hydrogen production module, and the medium-temperature water obtained is also stored in the medium-temperature water storage tank in the hot water collection tank, so that the hydrogen-oxygen separation module in the proton exchange membrane water electrolysis hydrogen production module is always maintained at 90±5°C, and the water temperature of the hot water collection tank is raised to above 50°C by the solar collector in the heat collection system, and stored in the medium-temperature water storage tank in the hot water collection tank. The water cooling module cools and purifies the hydrogen and oxygen prepared by the electrolysis module in the proton exchange membrane water electrolysis hydrogen production module by using chilled water, and at the same time uses chilled water to keep the solid hydrogen storage material in the solid hydrogen storage module in the hydrogen storage module at a hydrogen absorption state of 10°C or below, so as to absorb hydrogen and store it on a large scale.

[0071] It should be noted that if there is a demand for heating during the day, after hydrogen is produced, it can directly enter the high-temperature proton exchange membrane fuel cell system from the hydrogen buffer tank to provide hydrogen and provide oxygen support to household buildings without going through the solid-state hydrogen storage module, so as to achieve hydrogen and oxygen production and use at the same time, thereby significantly reducing the safety risks of the thermal power hydrogen and oxygen cogeneration system while ensuring the multiple needs of household buildings for electricity, heat energy and oxygen.

[0072] The night working method comprises:

[0073] The phase change heat storage module in the hydrogen storage module is preferentially triggered so that the phase change heat storage module heats the solid-state hydrogen storage module in the hydrogen storage module to reach the hydrogen release temperature; if the heat released by the phase change heat storage material is insufficient to meet the hydrogen release temperature, the medium-temperature water storage tank is heated by an electrochemical energy storage battery to meet the hydrogen release temperature, thereby enabling the solid-state hydrogen storage module to provide hydrogen support to the high-temperature proton exchange membrane fuel cell system; specifically, the phase change heat storage module in the hydrogen storage module is preferentially triggered to reduce its temperature to the phase change temperature of 87°C, at which time the phase change heat storage module begins to solidify and release heat, thereby heating the solid-state hydrogen storage module in the hydrogen storage module, and the solid-state hydrogen storage module immediately releases hydrogen to the high-temperature proton exchange membrane fuel cell system, and the high-temperature proton exchange membrane fuel cell system begins to work normally and generate electricity;

[0074] The oxygen in the oxygen storage module and the hydrogen in the hydrogen storage module respectively pass through the air supply module and the fuel receiving module in the high-temperature proton exchange membrane fuel cell system and enter the fuel cell module of the high-temperature proton exchange membrane fuel cell system to react, so that the fuel cell module generates electricity, so as to provide nighttime power support to household buildings under the conditions of insufficient light and insufficient electricity generated by the photovoltaic power generation system; at the same time, the water in the medium-temperature water storage tank of the hot water storage tank is heat exchanged through the cooling module of the high-temperature proton exchange membrane fuel cell system. Specifically, the water in the medium-temperature water storage tank of the hot water storage tank can be heat exchanged to high-temperature water of 85 to 95°C, and the waste heat generated by the fuel cell module is transferred to the high-temperature water storage tank of the hot water storage tank, so as to increase the heating water temperature in the building three times, and provide water heating support to household buildings, thereby meeting the heating water temperature requirements of household buildings; it should be noted that based on this setting, it is possible to ensure reliable supply of electricity to household buildings at night, and at the same time generate high-temperature water to heat household buildings, ensuring that the indoor temperature in winter is not lower than 20°C.

[0075] The oxygen stored in the oxygen storage module provides oxygen support to the household building through the oxygen distributor and indoor oxygen concentration detection system in the oxygen storage module, and makes real-time adjustments to maintain the oxygen concentration in the household building, so as to ensure that the diffuse oxygen supply in the building reaches an appropriate concentration range. Specifically, in this embodiment, an appropriate proportion of oxygen can be distributed to each room of the household building through the indoor oxygen concentration detection system, so that the oxygen concentration in the household building meets the needs of the household, thereby reducing the household oxygen cost, thereby popularizing diffuse oxygen supply in the building and ensuring oxygen supply.

[0076] It should be noted that the oxygen stored in the oxygen storage module of the hydrogen production system can also be fed back to the air supply module of the high-temperature proton exchange membrane fuel cell system, thereby increasing the oxygen concentration in the air entering the fuel cell module and effectively improving the working efficiency of the fuel cell.

[0077] In this embodiment, in the case of continuous rainy weather, the night working method further includes:

[0078] The high-temperature proton exchange membrane fuel cell system receives other hydrogen-containing fuel gases through the fuel receiving module and converts them into electrical energy, so as to provide electrical energy support to household buildings in the case of continuous rainy days and no light resources; at the same time, the water in the medium-temperature water storage tank of the hot water storage tank is heat exchanged through the cooling module of the high-temperature proton exchange membrane fuel cell system. Specifically, the other hydrogen-containing fuel gases that the high-temperature proton exchange membrane fuel cell system can receive may include natural gas, coke oven gas, liquid ammonia cracking gas and methanol reforming gas. The water in the medium-temperature water storage tank of the hot water storage tank can be heat exchanged to high-temperature water above 80°C, and the heat energy is transferred to the high-temperature water storage tank of the hot water storage tank, so as to provide basic water heating guarantee for household buildings. It should be noted that based on this setting, it can ensure the reliable supply of electricity to household buildings at night, and the high-temperature water generated can provide basic heating guarantee for household buildings, ensuring that the indoor temperature is not lower than 18°C.

[0079] This setting can ensure that the diversified energy needs in household buildings can be met even in extreme weather conditions.

[0080] In this embodiment, when there is a heating requirement during the day, the daytime working method further includes:

[0081] The photovoltaic power generation system converts solar energy into electrical energy so as to provide electrical energy support to the household building, the proton exchange membrane water electrolysis hydrogen production module and the phase change heat storage module in sequence;

[0082] The hydrogen production system, when powered, electrolyzes water through the proton exchange membrane water electrolysis hydrogen production module to generate hydrogen and oxygen, and stores the hydrogen and oxygen through the hydrogen storage module and the oxygen storage module respectively, and can directly enter the high-temperature proton exchange membrane fuel cell system from the hydrogen buffer tank in the hydrogen storage module without passing through the solid-state hydrogen storage module to provide hydrogen, so as to provide electrical energy support and water heating guarantee for household buildings. In this way, the technical effect of production and use can be achieved, thereby significantly reducing the safety risks of the thermal power hydrogen and oxygen cogeneration system under the premise of ensuring the multiple needs of household buildings for electricity, heat energy, and oxygen.

[0083] It should be noted that the technical details and technical effects of the thermal power hydrogen and oxygen cogeneration method provided in this embodiment 2 can be found in embodiment 1 and will not be repeated here.

[0084] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. In this way, the present invention is not limited to any specific combination of hardware and software.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A thermal power hydrogen and oxygen cogeneration system, characterized in that: It includes a photovoltaic power generation system, a hydrogen production system, a high-temperature proton exchange membrane fuel cell system and a heat collection system; the power supply end of the photovoltaic power generation system is electrically connected to the power supply line of the household building and the power receiving end of the hydrogen production system respectively; the hydrogen production system includes a proton exchange membrane water electrolysis hydrogen production module, a hydrogen storage module, an oxygen storage module and a water cooling module, the hydrogen outlet of the proton exchange membrane water electrolysis hydrogen production module is connected to the air inlet of the hydrogen storage module, the oxygen outlet of the proton exchange membrane water electrolysis hydrogen production module is connected to the air inlet of the oxygen storage module, and the outlet of the oxygen storage module is connected to the oxygen supply pipeline of the user building. The water cooling module is connected and arranged to heat exchange with the proton exchange membrane water electrolysis hydrogen production module and the hydrogen storage module respectively; the fuel receiving end of the high-temperature proton exchange membrane fuel cell system is connected and arranged to communicate with the outlet of the hydrogen storage module, and the power supply end of the high-temperature proton exchange membrane fuel cell system is electrically connected to the power supply line of the household building; the heat collection system includes a solar collector and a hot water storage tank, the hot water storage tank is heat exchanged with the solar collector and the high-temperature proton exchange membrane fuel cell system, and the water outlet of the hot water storage tank is connected and arranged to communicate with the heating pipeline of the user building.

2. A heat and power hydrogen and oxygen cogeneration system according to claim 1, characterized in that: The photovoltaic power generation system includes a photovoltaic component, a first DC-DC conversion module, a second DC-DC conversion module, an electrochemical energy storage module, a voltage regulator and a first DC-AC conversion module; the power output end of the photovoltaic component is electrically connected to the input end of the first DC-DC conversion module, the output end of the first DC-DC conversion module is electrically connected to the first conversion end of the second DC-DC conversion module, the input end of the voltage regulator and the input end of the first DC-AC conversion module respectively, the second conversion end of the second DC-DC conversion module is electrically connected to the electrochemical energy storage module, the proton exchange membrane water electrolysis hydrogen production module includes an electrolysis module, the output end of the voltage regulator is electrically connected to the power receiving end of the electrolysis module, and the output end of the first DC-AC conversion module is electrically connected to the power receiving end of the proton exchange membrane water electrolysis hydrogen production module and the power receiving end of the hydrogen storage module as the power supply end of the photovoltaic power generation system.

3. A heat and power hydrogen and oxygen cogeneration system according to claim 1, characterized in that: The proton exchange membrane water electrolysis hydrogen production module includes an electrolysis module, a hydrogen-oxygen separation module, a hydrogen purification module and an oxygen purification module; the power receiving end of the electrolysis module and the power receiving end of the hydrogen-oxygen separation module are both electrically connected to the power supply end of the photovoltaic power generation system; the electrolysis module is connected to the hydrogen-oxygen separation module, the hydrogen outlet of the hydrogen-oxygen separation module is connected to the air inlet of the hydrogen purification module, the air outlet of the hydrogen purification module is connected to the air inlet of the hydrogen storage module, the oxygen outlet of the hydrogen-oxygen separation module is connected to the air inlet of the oxygen purification module, and the air outlet of the oxygen purification module is connected to the air inlet of the oxygen storage module; the hydrogen-oxygen separation module is heat exchanged with the water cooling module.

4. A heat, power, hydrogen and oxygen cogeneration system according to claim 3, characterized in that: The hydrogen storage module includes a hydrogen buffer tank, a solid-state hydrogen storage module and a phase change heat storage module; the air inlet of the hydrogen buffer tank is connected to the air outlet of the hydrogen purification module as the air inlet of the hydrogen storage module, the air outlet of the hydrogen buffer tank is connected to the air inlet of the solid-state hydrogen storage module, and the air outlet of the solid-state hydrogen storage module is connected to the fuel receiving end of the high-temperature proton exchange membrane fuel cell system as the air outlet of the hydrogen storage module; the phase change heat storage module is heat exchanged with the solid-state hydrogen storage module; the power receiving end of the phase change heat storage module is electrically connected to the power supply end of the photovoltaic power generation system.

5. A heat, power, hydrogen and oxygen cogeneration system according to claim 4, characterized in that: The water cooling module includes a cooling tower, a chilled water tank and a cooling water tank; the water outlet of the cooling tower is connected to the water inlet of the chilled water tank and the first water inlet of the cooling water tank respectively, the water outlet of the chilled water tank is connected to the second water inlet of the cooling water tank through a first heat exchange pipe, a second heat exchange pipe and a third heat exchange pipe respectively, the first heat exchange pipe is heat exchanged with the solid hydrogen storage module, the second heat exchange pipe is heat exchanged with the hydrogen purification module, the third heat exchange pipe is heat exchanged with the oxygen purification module, the cooling water outlet of the cooling water tank is connected to the water collection tank through a fourth heat exchange pipe, and the fourth heat exchange pipe is heat exchanged with the hydrogen-oxygen separation module.

6. A heat and power hydrogen and oxygen cogeneration system according to claim 1, characterized in that: The oxygen storage module includes an oxygen storage tank, an oxygen distributor and an indoor oxygen concentration detection system. The air inlet of the oxygen storage tank is connected to the oxygen outlet of the proton exchange membrane water electrolysis hydrogen production module as the air inlet of the oxygen storage module, the air outlet of the oxygen storage tank is connected to the air inlet of the oxygen distributor, the air outlet of the oxygen distributor is connected to the oxygen supply pipeline of the user building as the air outlet of the oxygen storage module, and the indoor oxygen concentration detection system is used to detect the oxygen concentration of different areas in the user building, so that the oxygen distributor can provide diffuse oxygen supply to different areas in the user building respectively.

7. The heat, power, hydrogen and oxygen cogeneration system according to claim 1, characterized in that: The high-temperature proton exchange membrane fuel cell system includes a fuel receiving module, a fuel cell module, an air supply module, a cooling module and a second DC-AC conversion module; the fuel receiving end of the fuel receiving module is connected to the outlet of the hydrogen storage module as the fuel receiving end of the high-temperature proton exchange membrane fuel cell system, and the fuel supply end of the fuel receiving module is connected to the fuel receiving end of the fuel cell module; the air receiving end of the fuel cell module is connected to the air supply outlet of the air supply module, and the air supply inlet of the air supply module is connected to the outlet of the oxygen storage module; the power output end of the fuel cell module is electrically connected to the input end of the second DC-AC conversion module, and the output end of the second DC-AC conversion module is electrically connected to the power supply line of the household building as the power supply end of the high-temperature proton exchange membrane fuel cell system, and the cooling module is heat exchanged with the fuel cell module; the high-temperature proton exchange membrane fuel cell system is heat exchanged with the heat collection water tank.

8. The heat, power, hydrogen and oxygen cogeneration system according to claim 1, characterized in that: The heat collection water storage tank includes a medium-temperature water storage tank and a high-temperature water storage tank; the water inlet of the medium-temperature water storage tank is connected to the cooling water outlet of the water cooling module, the medium-temperature water storage tank is heat exchanged with the solar collector, the water outlet of the medium-temperature water storage tank is connected to the high-temperature water storage tank through a water conduit, the water conduit is heat exchanged with the high-temperature proton exchange membrane fuel cell system, and the water outlet of the high-temperature water storage tank is connected to the heating pipe of the user building as the water outlet of the heat collection water storage tank.

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