A cascade heating and oxygen supply system

Abstract

This invention relates to a tiered heating and oxygen supply system, belonging to the field of high-altitude air conditioning technology. The system integrates photovoltaic power generation, solar thermal collection, water electrolysis oxygen production, fuel cell cogeneration, and oxygen filling devices. Since the energy source of the tiered heating and oxygen supply system is solar radiation, it utilizes both the photovoltaic power generation system for electricity generation and the solar thermal collection system for heating, achieving zero carbon emissions for the entire system. By utilizing the difference in heat quality between the solar thermal collection system and the hydrogen fuel cell cogeneration system, tiered heating can be provided to users; the high-temperature hot water provided by the solar thermal collection system can be used for heating, while the medium- and low-temperature hot water provided by the fuel cell cogeneration system can be used for bathing. The system utilizes a combination of pressurization and depressurization equipment to store oxygen from the same source at different pressures, achieving tiered oxygen supply for different oxygen-consuming terminals.

Description

[0001] Technical Field

[0002] This utility model belongs to the field of high-altitude air conditioning technology, specifically a cascade heating and oxygen supply system.

[0003] Background Technology

[0004] In extremely high-altitude regions like Tibet, the unique geographical environment leads to chronic conditions such as oxygen deficiency and extreme cold. With local economic development and population growth, the demand for heating and oxygen supply is increasing. Residents and herders in remote areas often live in scattered settlements, making traditional energy supply methods insufficient to cover them, resulting in inadequate heating and oxygen shortages during winter. At high altitudes, reduced oxygen levels have a significant impact on human health, especially for the elderly, children, and those with respiratory illnesses; a continuous supply of oxygen is a fundamental requirement for their survival.

[0005] Traditional heating methods primarily rely on fossil fuels such as coal and oil, generating heat through combustion. However, this method not only causes environmental pollution but also suffers from low energy efficiency. In high-altitude regions, the high cost of fossil fuels due to transportation limitations further exacerbates the heating difficulties. Furthermore, traditional heating systems typically only provide hot water or heating at a single temperature, failing to provide tiered heating based on varying user needs, resulting in energy waste and unsatisfactory heating performance.

[0006] Currently, common oxygen supply methods include oxygen cylinders and oxygen concentrators. Oxygen cylinders need to be replaced regularly, have high transportation and storage costs, and are difficult to replenish in remote areas. While traditional oxygen concentrators can produce oxygen on-site, they typically only provide one pressure level, failing to meet the diverse needs of different users. For example, medical applications require high-pressure oxygen, while daily life may only require low-pressure oxygen; traditional oxygen supply systems cannot flexibly adapt to this difference.

[0007] Traditional heating and oxygen supply processes mostly rely on the combustion of fossil fuels or industrial oxygen production. These processes generate large amounts of carbon dioxide and other harmful gases, causing serious environmental pollution. In the current global context of advocating green and low-carbon development, traditional heating and oxygen supply processes are unable to meet environmental protection requirements and are detrimental to the sustainable development of plateau regions. Utility Model Content

[0008] The purpose of this utility model is to provide a cascade heating and oxygen supply system to address the problems existing in the prior art. This system is an integrated device that combines photovoltaic power generation, solar thermal collection, water electrolysis oxygen production, fuel cell combined heat and power, and oxygen filling processes, and can realize cascade heating and oxygen supply to users.

[0009] To achieve the purpose of this utility model, the specific technical solution adopted is as follows:

[0010] A cascade heating and oxygen supply system includes a photovoltaic power generation system, a power supply and distribution device, a solar thermal collection system, a high-temperature hot water circulation pump, a high-temperature hot water storage tank, a water electrolysis hydrogen and oxygen production device, a hydrogen storage device, a medium-pressure oxygen storage tank, a pressure regulating valve group, a low-pressure oxygen storage tank, an oxygen compressor, a high-pressure oxygen storage tank, a high-pressure oxygen filling system, a fuel cell cogeneration device, a medium- and low-temperature hot water circulation pump, a medium- and low-temperature hot water storage tank, and a diffused oxygen supply system.

[0011] Both the photovoltaic power generation system and the fuel cell combined heat and power unit are connected to the power supply and distribution equipment.

[0012] The power supply and distribution equipment is connected to the water electrolysis hydrogen and oxygen production unit to provide power to the water electrolysis hydrogen and oxygen production unit.

[0013] The water electrolysis hydrogen and oxygen production unit is connected to the hydrogen storage unit and the medium-pressure oxygen storage tank via pipelines, respectively.

[0014] The hydrogen storage device is connected in sequence to the fuel cell cogeneration unit, the medium-low temperature hot water circulation pump, the medium-low temperature hot water storage tank, and the hot water system installed by the user.

[0015] The solar thermal system is connected in sequence to a high-temperature hot water circulating pump, a high-temperature hot water storage tank, and a user-installed diffused oxygen supply system.

[0016] The medium-pressure oxygen storage tank is connected to a pressure regulating valve assembly; the pressure regulating valve assembly is a device that can reduce the pressure of the hydrogen supplied by the medium-pressure oxygen storage tank.

[0017] The pressure regulating valve assembly is connected to the low-pressure oxygen storage tank, which is then connected to the diffused oxygen supply system. The pressure regulating valve assembly reduces the pressure of the hydrogen supplied by the medium-pressure oxygen storage tank and further transmits it through pipelines to the low-pressure oxygen storage tank for storage. The low-pressure oxygen storage tank is connected to the user's diffused oxygen supply system via a hydrogen pipeline, continuously supplying oxygen to the user's room.

[0018] Furthermore, in the aforementioned cascade heating and oxygen supply system, a medium-pressure oxygen storage tank and an oxygen compressor are connected; the oxygen compressor is sequentially connected to a high-pressure oxygen storage tank and a high-pressure oxygen filling system. The oxygen compressor can increase the pressure of hydrogen supplied by the medium-pressure oxygen storage tank and further transport it through pipelines to the high-pressure oxygen storage tank for storage; the rear end of the high-pressure oxygen storage tank is connected to the high-pressure oxygen filling system through pipelines, enabling the filling of medium- and high-pressure oxygen cylinders.

[0019] Furthermore, in the aforementioned cascade heating and oxygen supply system, the user is provided with a diffused oxygen supply system and a hot water system.

[0020] Furthermore, the aforementioned cascade heating and oxygen supply system also includes an insulated hot water circulation pump; the insulated hot water circulation pump is connected to a high-temperature hot water storage tank and a water electrolysis hydrogen and oxygen production device via hot water pipes.

[0021] Furthermore, in the aforementioned cascade heating and oxygen supply system, the photovoltaic power generation system is equipped with several photovoltaic modules, which are connected to each other via DC cables to form several photovoltaic arrays. The photovoltaic modules are devices that generate electricity using the energy of solar radiation, and the generated electricity is connected to the power distribution device via photovoltaic combiner cables.

[0022] Furthermore, in the aforementioned cascade heating and oxygen supply system, the power supply and distribution device is equipped with a DC / DC converter, an AC / DC converter, and an AC / AC converter, providing both AC and DC output capabilities. The power supply and distribution device is connected to the water electrolysis hydrogen and oxygen production unit via a power cable, ensuring its power supply.

[0023] Furthermore, in the aforementioned cascade heating and oxygen supply system, the solar thermal collector system is a system that receives solar radiation to heat the water in the circulating pipes. The solar thermal collector system receives solar radiation, heats the water in the circulating pipes, and then, through a high-temperature hot water circulation pump, sends it to a high-temperature hot water storage tank. The low-temperature hot water storage tank is connected to the user's hot water system via hot water pipes, providing the user with a continuous supply of high-temperature hot water.

[0024] Furthermore, in the aforementioned cascade heating and oxygen supply system, the water electrolysis hydrogen and oxygen production device is equipped with an electrolyzer, a gas-liquid treatment device, and auxiliary equipment. The water electrolysis hydrogen and oxygen production device receives alternating current from the power supply and distribution unit and performs an electrochemical reaction to decompose hydrogen and oxygen from water. The produced hydrogen is transported via a hydrogen pipeline to a hydrogen storage device for storage. The hydrogen storage device is connected to a fuel cell cogeneration unit via a hydrogen pipeline, which can supply hydrogen to it. The oxygen produced by the water electrolysis hydrogen and oxygen production device is transported via an oxygen pipeline to a medium-pressure oxygen storage tank for storage, and then transported via pipelines to a pressure regulating valve group and an oxygen compressor.

[0025] Furthermore, in the aforementioned cascade heating and oxygen supply system, the fuel cell cogeneration device utilizes hydrogen to generate electricity and simultaneously produces a large quantity of medium- and low-temperature hot water. The fuel cell cogeneration device receives hydrogen from a hydrogen storage device to generate electricity, producing a large quantity of medium- and low-temperature hot water in the process. This hot water is then circulated by a medium- and low-temperature hot water circulation pump and stored in a medium- and low-temperature hot water storage tank. The storage tank is connected to the user's hot water system via hot water pipes, providing a continuous supply of medium- and low-temperature hot water to the user.

[0026] Compared with the prior art, the main advantages of this utility model are as follows:

[0027] 1. The energy source of this cascade heating and oxygen supply system is solar radiation. It uses both photovoltaic power generation system for power generation and solar thermal collection system for heating, thus achieving zero carbon emissions for the entire system.

[0028] 2. This tiered heating and oxygen supply system utilizes the difference in heat quality between the solar thermal collector system and the hydrogen fuel cell cogeneration system to achieve tiered heating for users; the high-temperature hot water provided by the solar thermal collector system can be used for heating, while the medium- and low-temperature hot water provided by the fuel cell cogeneration system can be used for bathing.

[0029] 3. This cascade heating and oxygen supply system utilizes a combination of pressurization and depressurization equipment to store oxygen from the same source at different pressures, enabling cascaded oxygen supply for different oxygen-consuming terminals. Low-pressure oxygen can be connected to the user's diffused oxygen supply system, while high-pressure oxygen can be used to fill oxygen cylinders via a high-pressure oxygen filling system. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a cascade heating and oxygen supply system as described in Example 1;

[0031] Figure 2 This is a schematic diagram of the structure of a cascade heating and oxygen supply system as described in Example 2;

[0032] Among them, 1—photovoltaic power generation system, 2—power supply and distribution equipment, 3—solar thermal collection system, 4—high temperature hot water circulation pump, 5—high temperature hot water storage tank, 6—water electrolysis hydrogen and oxygen production device, 7—hydrogen storage device, 8—medium pressure oxygen storage tank, 9—pressure regulating valve group, 10—low pressure oxygen storage tank, 11—oxygen compressor, 12—high pressure oxygen storage tank, 13—high pressure oxygen filling system, 14—fuel cell cogeneration device, 15—medium and low temperature hot water circulation pump, 16—medium and low temperature hot water storage tank, 17—insulated hot water circulation pump, 18—user. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0034] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0035] It should be noted that the terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the exemplary implementations according to this application. As used herein, the singular form includes the plural form unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this description, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0036] In this utility model, some conventional operating equipment, devices and components have been omitted or only briefly described.

[0037] Unless otherwise specified in the examples, the conditions shall be performed in accordance with the standard conditions or the conditions recommended by the manufacturer.

[0038] Example 1:

[0039] A cascade heating and oxygen supply system, the specific structural diagram of which is shown below. Figure 1 This system is adapted to the different heat and oxygen needs of users in high-altitude areas. It includes a photovoltaic power generation system 1, a power supply and distribution device 2, a solar thermal collection system 3, a high-temperature hot water circulation pump 4, a high-temperature hot water storage tank 5, a water electrolysis hydrogen and oxygen production device 6, a hydrogen storage device 7, a medium-pressure oxygen storage tank 8, a pressure regulating valve group 9, a low-pressure oxygen storage tank 10, an oxygen compressor 11, a high-pressure oxygen storage tank 12, a high-pressure oxygen filling system 13, a fuel cell combined heat and power device 14, a medium- and low-temperature hot water circulation pump 15, a medium- and low-temperature hot water storage tank 16, and a diffused oxygen supply system 18.

[0040] Among them, the photovoltaic power generation system 1 and the fuel cell cogeneration device 14 are both connected to the power supply and distribution device 2;

[0041] The power supply and distribution device 2 is connected to the water electrolysis hydrogen and oxygen production device 6, and provides power to the water electrolysis hydrogen and oxygen production device 6.

[0042] The water electrolysis hydrogen and oxygen production unit 6 is connected to the hydrogen storage unit 7 and the medium-pressure oxygen storage tank 8 via pipelines, respectively.

[0043] The hydrogen storage device 7 is connected in sequence to the fuel cell cogeneration device 14, the medium-low temperature hot water circulation pump 15, the medium-low temperature hot water storage tank 16, and the user 18.

[0044] The solar thermal collector system 3 is connected in sequence to the high-temperature hot water circulation pump 4, the high-temperature hot water storage tank 5, and the user 18;

[0045] The medium-pressure oxygen storage tank 8 is connected to the pressure regulating valve group 9;

[0046] The pressure regulating valve group 9 is connected to the low-pressure oxygen storage tank 10 and then to the diffused oxygen supply system 18.

[0047] The photovoltaic power generation system 1 is equipped with several photovoltaic modules, which are connected to each other via DC cables to form several photovoltaic arrays. The photovoltaic modules generate electricity using the energy of solar radiation, and the generated electricity is connected to the power supply and distribution device 2 via photovoltaic combiner cables.

[0048] The power supply and distribution unit 2 is equipped with a DC / DC converter, an AC / DC converter, and an AC / AC converter, providing both AC and DC output capabilities. The power supply and distribution unit 2 is connected to the water electrolysis hydrogen and oxygen production unit 6 via cables, ensuring its power supply.

[0049] The water electrolysis hydrogen and oxygen production unit 6 is equipped with an electrolyzer, a gas-liquid treatment device, and auxiliary equipment. It receives alternating current from the power supply and distribution unit 2 and performs an electrochemical reaction to decompose hydrogen and oxygen from water. The produced hydrogen is transported to a hydrogen storage unit 7 via a hydrogen pipeline for storage. The hydrogen storage unit 7 is connected to the fuel cell cogeneration unit 14 via a hydrogen pipeline, which can supply hydrogen to it. The oxygen produced by the water electrolysis hydrogen and oxygen production unit 6 is transported to a medium-pressure oxygen storage tank 8 via an oxygen pipeline for storage, and then transported to a pressure regulating valve group 9 and an oxygen compressor 11 via pipelines.

[0050] The pressure regulating valve assembly 9 can reduce the pressure of the hydrogen supplied by the medium-pressure oxygen storage tank and further transport it through pipeline to the low-pressure oxygen storage tank 10 for storage. The low-pressure oxygen storage tank 10 is connected to the diffused oxygen supply system of user 18 through a hydrogen pipeline, which can continuously deliver oxygen to the user's room to achieve oxygen supply.

[0051] The oxygen compressor 11 can increase the pressure of hydrogen supplied by the medium-pressure oxygen storage tank and further transport it to the high-pressure oxygen storage tank 12 for storage through pipelines; the rear end of the high-pressure oxygen storage tank 12 is connected to the high-pressure oxygen filling system through pipelines, which can realize the filling of medium and high-pressure oxygen cylinders.

[0052] The fuel cell combined heat and power unit 14 receives hydrogen from the hydrogen storage unit 7 to generate electricity, simultaneously producing a large amount of medium- and low-temperature hot water. This hot water is then circulated by the medium- and low-temperature hot water circulation pump 15 and stored in the medium- and low-temperature hot water storage tank 16. The storage tank 16 is connected to the user 18's hot water system via a hot water pipeline, providing a continuous supply of medium- and low-temperature hot water to the user 18.

[0053] The solar thermal collector system 3 receives solar radiation, heats the water in the circulation pipe, and then enters the high-temperature hot water storage tank 5 through the action of the high-temperature hot water circulation pump 4. The low-temperature hot water storage tank 16 is connected to the hot water system of user 18 through hot water pipes, and can provide user 18 with a continuous supply of high-temperature hot water.

[0054] Example 2:

[0055] A cascade heating and oxygen supply system, the specific structural diagram of which is shown below. Figure 2 Based on Example 1, a heat-insulating hot water circulation pump 17 was added.

[0056] like Figure 2 As shown, the insulated hot water circulation pump 17 is connected to the high-temperature hot water storage tank 5 and the water electrolysis hydrogen and oxygen production device 6 via hot water pipes. The high-temperature hot water stored in the high-temperature hot water storage tank 5 can enter the water electrolysis hydrogen and oxygen production device 6 under the action of the insulated hot water circulation pump 17, providing it with heat for insulation and preheating, which can solve the problem of its long cold start time.

[0057] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

[0058] The background section is provided to generally present the context of this utility model. The work of the currently named inventors, the work to the extent described in this background section, and aspects described in this section that did not constitute prior art at the time of filing are neither expressly nor impliedly acknowledged as prior art to this utility model.

Claims

1. A cascade heat and oxygen supply system, characterized in that The system includes a photovoltaic power generation system (1), a power supply and distribution device (2), a solar thermal collection system (3), a high-temperature hot water circulation pump (4), a high-temperature hot water storage tank (5), a water electrolysis hydrogen and oxygen production device (6), a hydrogen storage device (7), a medium-pressure oxygen storage tank (8), a pressure regulating valve group (9), a low-pressure oxygen storage tank (10), an oxygen compressor (11), a high-pressure oxygen storage tank (12), a high-pressure oxygen filling system (13), a fuel cell cogeneration device (14), a medium-low temperature hot water circulation pump (15), a medium-low temperature hot water storage tank (16), and a user (18). The photovoltaic power generation system (1) and the fuel cell cogeneration device (14) are both connected to the power supply and distribution device (2); The power supply and distribution device (2) is connected to the water electrolysis hydrogen and oxygen production device (6) to provide power to the water electrolysis hydrogen and oxygen production device (6); The water electrolysis hydrogen and oxygen production unit (6) is connected to the hydrogen storage unit (7) and the medium-pressure oxygen storage tank (8) through pipelines respectively; The hydrogen storage device (7) is connected in sequence to the fuel cell cogeneration device (14), the medium-low temperature hot water circulation pump (15), the medium-low temperature hot water storage tank (16), and the user (18); The solar thermal collector system (3) is connected in sequence to the high-temperature hot water circulation pump (4), the high-temperature hot water storage tank (5), and the user (18); The medium-pressure oxygen storage tank (8) is connected to the pressure regulating valve group (9); The pressure regulating valve assembly (9) is connected to the low-pressure oxygen storage tank (10) and then to the user (18).

2. The cascade heating and oxygen supply system according to claim 1, characterized in that: The medium-pressure oxygen storage tank (8) and the oxygen compressor (11) are connected; the oxygen compressor (11) is connected in sequence to the high-pressure oxygen storage tank (12) and the high-pressure oxygen filling system (13).

3. The cascade heat and oxygen supply system according to claim 1, characterized in that: The system also includes an insulated hot water circulation pump (17); the insulated hot water circulation pump (17) is connected to the high-temperature hot water storage tank (5) and the water electrolysis hydrogen and oxygen production device (6) respectively through hot water pipes.

4. A cascade heating and oxygen supply system according to any one of claims 1-3, characterized in that: The photovoltaic power generation system (1) is equipped with several photovoltaic modules, which are connected to each other by DC cables to form several photovoltaic arrays; the photovoltaic modules are devices that generate electricity using solar radiation.

5. A cascade heating and oxygen supply system according to any one of claims 1-3, characterized in that: The power supply and distribution device (2) is equipped with a DC / DC converter, an AC / DC converter and an AC / AC converter.

6. The cascade heat and oxygen supply system according to any one of claims 1-3, characterized in that: A solar thermal system (3) is a system that heats water in a circulating pipe to receive solar radiation.

7. The cascade heat and oxygen supply system according to any one of claims 1-3, characterized in that: The water electrolysis hydrogen and oxygen production device (6) is equipped with an electrolytic cell, a gas-liquid treatment device and auxiliary equipment.

8. The cascade heat and oxygen supply system according to any one of claims 1-3, characterized in that: The pressure regulating valve assembly (9) is a device that can reduce the pressure of hydrogen supplied by the medium-pressure oxygen storage tank.

9. The cascade heat and oxygen supply system according to any one of claims 1-3, characterized in that: The fuel cell combined heat and power device (14) is a device that uses hydrogen to generate electricity and can generate a large amount of medium and low temperature hot water at the same time.

10. The cascade heat and oxygen supply system according to any one of claims 1-3, characterized in that: The user (18) is equipped with a diffused oxygen supply system and a hot water system.

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