Heat exchange system and method for hydrogen fuel

Abstract

The invention relates to the technical field of hydrogen fuel, in particular to a hydrogen fuel heat exchange system and method, and aims to solve the problems of unstable fuel supply and low overall energy utilization rate of the system in the prior art. The heat exchange system of the hydrogen fuel comprises a hydrogen storage unit, a driving unit, a heat exchange unit, a combustion unit, a base, a gas inlet pipeline, a first liquid inlet pipeline, a second liquid inlet pipeline and a feeding pipeline. The hydrogen storage unit, the driving unit, the heat exchange unit and the combustion unit are all fixedly arranged on the base. The hydrogen storage unit is provided with a liquid inlet, the first liquid inlet pipeline is communicated with the liquid inlet of the hydrogen storage unit and used for conveying liquid hydrogen to the hydrogen storage unit, the first switch piece is arranged on the first liquid inlet pipeline, and the second liquid inlet pipeline is communicated with the driving unit; a liquid outlet of the driving unit communicates with the heat exchange unit through a gas inlet pipeline, and the heat exchange unit is used for gasifying liquid hydrogen. The hydrogen fuel heat exchange system and method are used for improving the energy utilization rate.

Description

Technical Field

[0001] The present disclosure relates to the field of hydrogen fuel technology, and in particular to a heat exchange system and method for hydrogen fuel. Background Art

[0002] As the aviation sector moves towards zero-carbon emissions and high-efficiency development, hydrogen fuel, with its high energy density and zero-carbon combustion products, is regarded as a key energy source for aviation power innovation. Small hydrogen fuel power generation systems are also expected to become an important part of aviation distributed energy supply, providing clean and reliable energy solutions for aircraft auxiliary power systems, emergency power supply and other scenarios.

[0003] At present, traditional small-scale hydrogen fuel power generation systems face severe challenges in adapting to aircraft engine applications. In the fuel supply link, the storage and transportation of cryogenic liquid hydrogen has become a bottleneck restricting system performance. The stringent requirements of aviation on weight and space require liquid hydrogen storage tanks to achieve lightweight and compact design while meeting extremely low temperature storage conditions, which places extremely high demands on the insulation materials and structural design of the storage tanks. Large-scale vaporization of liquid hydrogen not only causes energy waste, but also increases system pressure and poses safety risks. In addition, in the extreme environment of high altitude, in the process of stably transporting liquid hydrogen from the storage tank to the engine burner, the existing delivery pump and pipeline system are easily affected by drastic changes in air pressure and temperature, resulting in pressure fluctuations and unstable flow, making it difficult to ensure the fuel supply required for the stable operation of the aircraft engine.

[0004] Aircraft engines have extremely high standards for energy conversion efficiency when it comes to heat exchange, and existing systems struggle to meet these requirements. Traditional heat exchangers often rely on a single heat source or inefficient heat exchange methods, making them unable to quickly vaporize liquid hydrogen and precisely heat it to the required combustion temperature for aircraft engines. This results in incomplete combustion and insufficient power output. Furthermore, at high altitudes and low temperatures, heat loss during the heat exchange process is exacerbated, further reducing the system's overall energy efficiency and impacting the engine's power performance and endurance.

[0005] Therefore, how to solve the problems of unstable fuel supply and low overall energy utilization of the system in the existing technology is one of the important issues that need to be solved urgently in this field. Summary of the Invention

[0006] In view of this, the embodiments of the present disclosure provide a hydrogen fuel heat exchange system and method to solve the problems in the prior art caused by unstable fuel supply and low overall energy utilization of the system.

[0007] According to one aspect of the present disclosure, a hydrogen fuel heat exchange system is provided, which includes: a hydrogen storage unit, a drive unit, a heat exchange unit, a combustion unit, a base, an air inlet pipe, a first liquid inlet pipe, a second liquid inlet pipe and a feed pipe, wherein the hydrogen storage unit, the drive unit, the heat exchange unit and the combustion unit are all fixedly arranged on the base; the hydrogen storage unit has a liquid inlet, the first liquid inlet pipe is connected to the liquid inlet of the hydrogen storage unit, and is used to transport liquid hydrogen to the hydrogen storage unit, the first switch member is provided on the first liquid inlet pipe, and the second liquid inlet pipe is connected to the drive unit; the liquid outlet of the drive unit is connected to the heat exchange unit through the air inlet pipe, and the heat exchange unit is used to gasify the liquid hydrogen; the heat exchange unit is connected to the combustion unit through the feed pipe, and the combustion unit is used to burn the gasified hydrogen.

[0008] In addition, according to one aspect of the present disclosure, the hydrogen fuel heat exchange system further includes a measuring component, which is provided on the feed pipe and is used to monitor performance parameters within the heat exchange unit.

[0009] According to the hydrogen fuel heat exchange system in one aspect of the present disclosure, a first pre-tightening subunit for monitoring liquid hydrogen is further provided in the hydrogen storage unit, and the first pre-tightening subunit is provided on the inner side wall of the hydrogen storage unit.

[0010] According to the hydrogen fuel heat exchange system according to one aspect of the present disclosure, the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe are all made of austenitic stainless steel.

[0011] According to one aspect of the present disclosure, the hydrogen fuel heat exchange system further includes a monitoring unit, which is provided at the exhaust port of the combustion unit and is used to monitor the gas concentration at the exhaust port.

[0012] According to an aspect of the present disclosure, a heat exchange system for hydrogen fuel is a skid-mounted structure.

[0013] According to one aspect of the present disclosure, the heat exchange system for hydrogen fuel has a skid-mounted structure with geometric dimensions of 3500 mm×2000 mm×2300 mm.

[0014] According to one aspect of the hydrogen fuel heat exchange system of the present disclosure, the hydrogen fuel heat exchange system further includes a second pre-tightening subunit, which is provided on the base and is used to monitor the hydrogen concentration in the hydrogen fuel heat exchange system.

[0015] According to another aspect of the present disclosure, a hydrogen fuel heat exchange method is provided, which is applied to the above-mentioned hydrogen fuel heat exchange system. The hydrogen fuel heat exchange method includes:

[0016] When the heat exchange system of the hydrogen fuel is in normal operation, nitrogen and hydrogen are introduced into the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe to complete the pipeline cleaning;

[0017] Starting the driving unit to pressurize the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe, and completing the pressure correction of the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe, so that the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe reach a preset pressure value;

[0018] When the heat exchange unit is in operation, gradually heating the heat exchange unit to a preset temperature, and collecting physical parameters of the heat exchange system of the hydrogen fuel when the heat exchange unit is at a stable temperature;

[0019] Changing the flow rate into the heat exchange unit and collecting the physical parameters of the hydrogen fuel heat exchange system;

[0020] When the liquid hydrogen in the hydrogen storage unit is lower than the limit position, the collection is terminated, and the heating power of the heat exchange unit is gradually reduced until the heating stops, and finally the heat exchange unit is shut down.

[0021] According to an aspect of the present disclosure, the hydrogen fuel heat exchange method, when the hydrogen fuel heat exchange system is in normal operation, introduces nitrogen and hydrogen into the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe to complete the pipeline cleaning, further comprising:

[0022] When the hydrogen fuel heat exchange system is in normal operation, 1 MPa liquid is input into the hydrogen fuel heat exchange system, flows through the first liquid inlet pipe and the second liquid inlet pipe, and is input into the heat exchange unit.

[0023] At least one of the above-mentioned technical solutions adopted in the embodiments of the present disclosure can achieve the following beneficial effects: in the above-mentioned hydrogen fuel heat exchange system, the hydrogen storage unit, the drive unit, the heat exchange unit and the combustion unit are all fixedly arranged on the base; the liquid inlet, the first liquid inlet pipe is connected to the liquid inlet of the hydrogen storage unit, and is used to transport liquid hydrogen to the hydrogen storage unit, the first switch is arranged on the first liquid inlet pipe, the second liquid inlet pipe is connected to the drive unit, the liquid outlet of the drive unit is connected to the heat exchange unit through the air inlet pipe, and the heat exchange unit is used to gasify the liquid hydrogen; the heat exchange unit is connected to the combustion unit through the feed pipe, and the combustion unit is used to burn the gasified hydrogen. The units are connected in order through the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe, forming a complete process from liquid hydrogen storage to combustion. Liquid hydrogen can be smoothly transported from the hydrogen storage unit to the heat exchange unit for gasification, and then to the combustion unit for combustion. The whole process is smooth, ensuring that the system can stably convert liquid hydrogen into usable energy. Based on this, the heat exchange unit uses the waste heat of the engine to heat the liquid hydrogen and vaporize it, and then supplies it to the combustion chamber for combustion. At the same time, the coldness of the liquid hydrogen can be used to cool the hot end components of the engine, thereby improving the overall thermal efficiency of the engine. The combustion unit burns the vaporized hydrogen, converting the chemical energy of the hydrogen into other forms of energy such as thermal energy, providing power or heat for external equipment or systems, and realizing the effective conversion and utilization of energy. In addition, the drive unit controls the air intake of the hydrogen storage unit, which can adjust the pressure and hydrogen flow rate in the hydrogen storage unit, and thus accurately control the operating status of the entire system. When the system is abnormal, the working status of the drive unit can be adjusted in time to ensure the safe operation of the system and ensure a stable fuel supply, effectively solving the problems of unstable fuel supply and low overall energy utilization of the system in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0025] Figure 1 is a schematic diagram illustrating the system structure of a heat exchange system using hydrogen fuel according to an embodiment of the present disclosure;

[0026] Figure 2 is a schematic diagram illustrating the structure of a heat exchange system for hydrogen fuel according to an embodiment of the present disclosure;

[0027] Figure 3 1 is a flow chart illustrating a heat exchange method for hydrogen fuel according to an embodiment of the present disclosure.

[0028] Reference numerals:

[0029] 1-Hydrogen storage unit, 2-Drive unit, 3-Heat exchange unit, 4-Combustion unit, 5-Measuring assembly, 6-First liquid inlet pipe, 7-Second liquid inlet pipe, 8-First switch component, 9-Air inlet pipe, 10-Feed pipe, 11-Base. DETAILED DESCRIPTION

[0030] The following describes embodiments of the present disclosure in more detail with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are for illustrative purposes only and are not intended to limit the scope of protection of the present disclosure.

[0031] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0032] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc. mentioned in this disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0033] It should be noted that the modifications of "one" and "multiple" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, they should be understood as "one or more".

[0034] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0035] As the aviation sector moves towards zero-carbon emissions and high-efficiency development, hydrogen fuel, with its high energy density and zero-carbon combustion products, is regarded as a key energy source for aviation power innovation. Small hydrogen fuel power generation systems are also expected to become an important part of aviation distributed energy supply, providing clean and reliable energy solutions for aircraft auxiliary power systems, emergency power supply and other scenarios.

[0036] At present, traditional small-scale hydrogen fuel power generation systems face severe challenges in adapting to aircraft engine applications. In the fuel supply link, the storage and transportation of cryogenic liquid hydrogen has become a bottleneck restricting system performance. The stringent requirements of aviation on weight and space require liquid hydrogen storage tanks to achieve lightweight and compact design while meeting extremely low temperature storage conditions, which places extremely high demands on the insulation materials and structural design of the storage tanks. Large-scale vaporization of liquid hydrogen not only causes energy waste, but also increases system pressure and poses safety risks. In addition, in the extreme environment of high altitude, in the process of stably transporting liquid hydrogen from the storage tank to the engine burner, the existing delivery pump and pipeline system are easily affected by drastic changes in air pressure and temperature, resulting in pressure fluctuations and unstable flow, making it difficult to ensure the fuel supply required for the stable operation of the aircraft engine.

[0037] Aircraft engines have extremely high standards for energy conversion efficiency when it comes to heat exchange, and existing systems struggle to meet these requirements. Traditional heat exchangers often rely on a single heat source or inefficient heat exchange methods, making them unable to quickly vaporize liquid hydrogen and precisely heat it to the required combustion temperature for aircraft engines. This results in incomplete combustion and insufficient power output. Furthermore, at high altitudes and low temperatures, heat loss during the heat exchange process is exacerbated, further reducing the system's overall energy efficiency and impacting the engine's power performance and endurance.

[0038] In response to the above problems, exemplary embodiments of the present disclosure provide a hydrogen fuel heat exchange system and method to solve the problems in the prior art caused by unstable fuel supply and low overall energy utilization of the system.

[0039] A gas turbine full-state design method according to an embodiment of the present disclosure will be described in detail below with reference to the accompanying drawings.

[0040] Figure 1 FIG2 is a schematic diagram of the system structure of a heat exchange system using hydrogen fuel according to an embodiment of the present disclosure. Figure 2 FIG is a schematic diagram illustrating the structure of a heat exchange system for hydrogen fuel according to an embodiment of the present disclosure. Figure 1 - Figure 2As shown, the heat exchange system of hydrogen fuel includes: a hydrogen storage unit 1, a drive unit 2, a heat exchange unit 3, a combustion unit 4, a base 11, an air inlet pipe 9, a first liquid inlet pipe 6, a second liquid inlet pipe 7 and a feed pipe 10. The hydrogen storage unit 1, the drive unit 2, the heat exchange unit 3 and the combustion unit 4 are all fixedly arranged on the base 11; the hydrogen storage unit 1 has a liquid inlet. It should be understood that the above-mentioned hydrogen storage unit 1 can be a tank body or a storage device of other structures or materials. The specific details are not repeated here. Taking the liquid hydrogen storage tank as an example, the above-mentioned hydrogen storage unit 1 adopts a high vacuum multi-layer insulation method to ensure that the liquid hydrogen can be stored at a temperature of 20K. Low-temperature liquid hydrogen is added to the liquid hydrogen storage tank by a tank truck. During use, when the liquid hydrogen in the liquid hydrogen storage tank is lower than the minimum liquid level, liquid hydrogen can be added again. At the same time, the above-mentioned hydrogen storage unit 1 also has a hydrogen boosting port to ensure the hydrogen pressure in the storage tank. The hydrogen boosting port ensures the hydrogen pressure in the storage tank. The first liquid inlet pipe 6 is connected to the liquid inlet of the hydrogen storage unit 1 and is used to transport liquid hydrogen to the hydrogen storage unit 1. The first switch 8 is provided on the first liquid inlet pipe 6. The second liquid inlet pipe 7 is connected to the drive unit 2. It should be understood that the above-mentioned drive unit can be a booster pump, a pressurizing device, etc., which will not be described in detail here. Taking a low-temperature liquid hydrogen pump as an example, it is used to pressurize liquid hydrogen; the liquid outlet of the drive unit 2 is connected to the heat exchange unit 3 through the air inlet pipe 9, and the heat exchange unit 3 is used to gasify the liquid hydrogen. It can be understood that the above-mentioned heat exchange unit is a plurality of heat exchangers connected in parallel, which use the waste heat of the engine for heat exchange; the heat exchange unit 3 is connected to the combustion unit 4 through the feed pipe 10, and the combustion unit 4 is used to burn the gasified hydrogen.

[0041] In practical applications, such as Figure 1 - Figure 2 As shown, each unit is connected in an orderly manner through the air inlet pipe 9, the first liquid inlet pipe 6, the second liquid inlet pipe 7 and the feed pipe 10, forming a complete process from liquid hydrogen storage to combustion. Liquid hydrogen can be smoothly transported from the hydrogen storage unit 1 to the heat exchange unit 3 for gasification, and then to the combustion unit 4 for combustion. The whole process is smooth, ensuring that the system can stably convert liquid hydrogen into usable energy. Based on this, the heat exchange unit 3 uses the waste heat of the engine to heat and vaporize the liquid hydrogen and then supply it to the combustion chamber for combustion. At the same time, the coldness of the liquid hydrogen can be used to cool the hot end components of the engine, thereby improving the overall thermal efficiency of the engine. The combustion unit 4 burns the gasified hydrogen, converting the chemical energy of the hydrogen into other forms of energy such as heat energy, providing power or heat for external equipment or systems, and realizing the effective conversion and utilization of energy. In addition, by controlling the air intake of the hydrogen storage unit 1 through the drive unit 2, the pressure and hydrogen flow rate in the hydrogen storage unit 1 can be adjusted, thereby accurately controlling the operating state of the entire system. When an abnormality occurs in the system, the working state of the drive unit 2 can be adjusted in time to ensure the safe operation of the system and the stable fuel supply, effectively solving the problems of unstable fuel supply and low overall energy utilization of the system in the prior art.

[0042] For example, Figure 1 As shown, the hydrogen fuel heat exchange system also includes a measuring component 5, which is provided on the feed pipe. It is understood that the measuring component 5 can be a temperature sensor or a pressure sensor. The temperature sensor is used to measure the medium temperature at the inlet and outlet of the heat exchange unit 3, and the pressure sensor is used to measure the pressure at the inlet and outlet of the heat exchange unit 3. The measuring component 5 is used to monitor the performance parameters within the heat exchange unit 3. The temperature and pressure sensors are used to monitor the pressure and temperature of each device inlet and outlet and the pipeline in real time. In addition, the feed pipeline of the combustion unit 4 is provided with a flow meter for measuring the hydrogen flow rate.

[0043] Exemplarily, a first pre-tightening sub-unit for monitoring liquid hydrogen is further provided in the hydrogen storage unit, and the first pre-tightening sub-unit is provided on the inner side wall of the hydrogen storage unit.

[0044] In actual applications, the first pre-tightening subunit is set on the inner wall of the hydrogen storage unit, which can monitor the pressure and stress generated by liquid hydrogen on the side wall in real time. Once a potential dangerous situation such as abnormal pressure increase or uneven stress distribution is found, timely measures can be taken to effectively avoid safety accidents such as explosions and leakages caused by improper storage of liquid hydrogen, greatly improving the safety of the hydrogen storage unit. The first pre-tightening subunit set on the inner wall can directly obtain key information about the contact point between liquid hydrogen and the hydrogen storage unit. When a hydrogen storage unit fails, this information can provide an important basis for fault diagnosis, quickly locate the source of the fault, and reduce the time and difficulty of troubleshooting. At the same time, based on the monitoring data, a more reasonable maintenance plan can be formulated to achieve preventive maintenance, avoid the occurrence of sudden failures, and improve the reliability and availability of the hydrogen storage system.

[0045] Exemplarily, the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe are all made of austenitic stainless steel. It is understood that the austenitic stainless steel material can be S316 stainless steel, 316L stainless steel, or 304 stainless steel, and these are not listed here. Taking S316 stainless steel as an example, since S316 stainless steel is austenitic stainless steel and performs well in the liquid hydrogen temperature range and has good compatibility with hydrogen, high vacuum multi-layer insulation technology is used to protect and treat the S316 stainless steel.

[0046] Exemplarily, the hydrogen fuel heat exchange system also includes a monitoring unit located at the exhaust port of the combustion unit. This monitoring unit is used to monitor the gas concentration at the exhaust port. By monitoring the gas concentration at the exhaust port, the combustion status of the hydrogen fuel can be monitored in real time. If the hydrogen content in the exhaust gas is too high, it indicates that the fuel is not fully combusting. Combustion parameters can be adjusted accordingly, such as optimizing the air-hydrogen mixture ratio and improving the operating state of the burner, to improve combustion efficiency, ensure full fuel utilization, and reduce energy waste.

[0047] For example, the hydrogen fuel heat exchange system is a skid-mounted structure. The skid-mounted structure is assembled and debugged in the factory, integrating the various units of the hydrogen fuel heat exchange system onto one or more skids. Once on site, installation is completed by simply positioning and connecting the skids, significantly shortening on-site installation time and improving project construction efficiency. Furthermore, the skid-mounted structure can be rationally designed and disassembled according to transportation conditions, facilitating transportation using trucks, trains, and other means of transportation. Furthermore, the skid-mounted structure optimizes the layout of each unit and pipeline of the hydrogen fuel heat exchange system, compactly integrating them onto the skid, effectively reducing the space occupied by the system. The skid-mounted structure has geometric dimensions of 3500mm × 2000mm × 2300mm. Integrating each unit onto a skid makes the structure of the entire heat exchange system more concise and clear, making it easier for operators and maintenance personnel to manage and maintain. It also reduces the length of connecting pipes and lines between equipment, reducing the risk of leakage and energy loss.

[0048] Exemplarily, the hydrogen fuel heat exchange system also includes a second pre-tightening subunit, which is provided on the base and is used to monitor the hydrogen concentration in the hydrogen fuel heat exchange system. If the hydrogen concentration increases abnormally or there is a trace of leakage, an early warning signal can be issued in time, so that the staff can take corresponding measures before the accident occurs, thereby effectively avoiding the occurrence of accidents. In addition, by continuously monitoring the hydrogen concentration, it can be ensured that the heat exchange system operates within a safe hydrogen concentration range. When the concentration approaches the dangerous threshold, the system can automatically take protective measures, such as stopping the operation of the hydrogen fuel heat exchange system, starting the ventilation device, etc., to prevent hydrogen accumulation from reaching the explosion limit and ensure the safety of the entire heat exchange system and the surrounding environment.

[0049] The present disclosure also provides a heat exchange method for hydrogen fuel, Figure 3 is a flow chart illustrating a heat exchange method for hydrogen fuel according to an embodiment of the present disclosure, as shown in FIG. Figure 3 As shown, the heat exchange method of hydrogen fuel is applied to the above-mentioned heat exchange system of hydrogen fuel, and the heat exchange method of hydrogen fuel includes:

[0050] S301: When the heat exchange system of the hydrogen fuel is in normal operation, nitrogen and hydrogen are introduced into the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe to complete the pipe cleaning.

[0051] S302: Start the driving unit to pressurize the air intake pipe, the first liquid intake pipe, the second liquid intake pipe and the feed pipe, and complete the pressure correction of the air intake pipe, the first liquid intake pipe, the second liquid intake pipe and the feed pipe, so that the air intake pipe, the first liquid intake pipe, the second liquid intake pipe and the feed pipe reach the preset pressure value.

[0052] S303: When the heat exchange unit is in operation, gradually heat the heat exchange unit to a preset temperature, and collect physical parameters of the heat exchange system of the hydrogen fuel when the heat exchange unit is at a stable temperature.

[0053] S304: changing the flow rate flowing into the heat exchange unit and collecting physical parameters of the heat exchange system of the hydrogen fuel.

[0054] S305: After the liquid hydrogen in the hydrogen storage unit is lower than the limit position, the collection is terminated, and the heating power of the heat exchange unit is gradually reduced until the heating stops, and finally the heat exchange unit is turned off.

[0055] Exemplarily, when the heat exchange system of the hydrogen fuel is in normal operation, nitrogen and hydrogen are introduced into the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe to complete the pipeline cleaning, which also includes: when the heat exchange system of the hydrogen fuel is in normal operation, 1MPa liquid is input into the heat exchange system of the hydrogen fuel, flowing through the first liquid inlet pipe and the second liquid inlet pipe and input into the heat exchange unit.

[0056] The above descriptions are merely some embodiments of the present disclosure and an illustration of the technical principles employed. Those skilled in the art should understand that the scope of disclosure involved in the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but also encompasses other technical solutions formed by any combination of the above-mentioned technical features or their equivalents without departing from the above-mentioned disclosed concepts. For example, a technical solution formed by replacing the above-mentioned features with (but not limited to) technical features with similar functions disclosed in the present disclosure.

[0057] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art will appreciate that the above examples are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Those skilled in the art will appreciate that modifications may be made to the above embodiments without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A hydrogen fuel heat exchange system, characterized in that: The hydrogen fuel heat exchange system includes: a hydrogen storage unit, a drive unit, a heat exchange unit, a combustion unit, a base, an air inlet pipe, a first liquid inlet pipe, a second liquid inlet pipe, a first switch component and a feed pipe. The hydrogen storage unit, the drive unit, the heat exchange unit and the combustion unit are all fixedly arranged on the base; the hydrogen storage unit has a liquid inlet, the first liquid inlet pipe is connected to the liquid inlet of the hydrogen storage unit, and is used to transport liquid hydrogen to the hydrogen storage unit, the first switch component is arranged on the first liquid inlet pipe, and the second liquid inlet pipe is connected to the drive unit; the liquid outlet of the drive unit is connected to the heat exchange unit through the air inlet pipe, and the heat exchange unit is used to gasify liquid hydrogen; the heat exchange unit is connected to the combustion unit through the feed pipe, and the combustion unit is used to burn the gasified hydrogen.

2. The hydrogen fuel heat exchange system according to claim 1, characterized in that: The heat exchange system for hydrogen fuel further includes a measuring component, which is disposed on the feed pipe and is used to monitor performance parameters within the heat exchange unit.

3. The hydrogen fuel heat exchange system according to claim 1, characterized in that: The hydrogen storage unit is further provided with a first pre-tightening sub-unit for monitoring liquid hydrogen, and the first pre-tightening sub-unit is arranged on the inner side wall of the hydrogen storage unit.

4. The hydrogen fuel heat exchange system according to claim 1, characterized in that: The air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe are all made of austenitic stainless steel.

5. The hydrogen fuel heat exchange system according to claim 1, characterized in that: The hydrogen fuel heat exchange system further includes a monitoring unit, which is provided at the exhaust port of the combustion unit and is used to monitor the gas concentration at the exhaust port.

6. The hydrogen fuel heat exchange system according to any one of claims 1 to 5, characterized in that: The heat exchange system of the hydrogen fuel is a skid-mounted structure.

7. The hydrogen fuel heat exchange system according to claim 6, characterized in that: The geometric dimensions of the skid-mounted structure are 3500mm×2000mm×2300mm.

8. The hydrogen fuel heat exchange system according to claim 6, characterized in that: The hydrogen fuel heat exchange system further includes a second pre-tightening subunit, which is disposed on the base and is used to monitor the hydrogen concentration in the hydrogen fuel heat exchange system.

9. A hydrogen fuel heat exchange method, applied to the hydrogen fuel heat exchange system according to any one of claims 1 to 8, characterized in that: The heat exchange method of the hydrogen fuel comprises: When the heat exchange system of the hydrogen fuel is in normal operation, nitrogen and hydrogen are introduced into the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe to complete the pipe cleaning; Starting the driving unit to pressurize the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe, and completing pressure correction of the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe, so that the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe reach a preset pressure value; When the heat exchange unit is in an operating state, gradually heating the heat exchange unit to a preset temperature, and collecting physical parameters of the heat exchange system of the hydrogen fuel when the heat exchange unit is at a stable temperature; changing the flow rate flowing into the heat exchange unit and collecting physical parameters of the heat exchange system of the hydrogen fuel; When the liquid hydrogen in the hydrogen storage unit is lower than the limit position, the collection is terminated, and the heating power of the heat exchange unit is gradually reduced until the heating stops, and finally the heat exchange unit is shut down.

10. The hydrogen fuel heat exchange method according to claim 9, characterized in that: When the heat exchange system of the hydrogen fuel is in normal operation, nitrogen and hydrogen are introduced into the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe to complete the pipeline cleaning, which further includes: When the heat exchange system of the hydrogen fuel is in normal operation, 1 MPa liquid is input into the heat exchange system of the hydrogen fuel, flows through the first liquid inlet pipe and the second liquid inlet pipe, and is input into the heat exchange unit.

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