Heat exchange system and method for hydrogen fuel

Abstract

The present disclosure relates to the technical field of hydrogen fuel, and particularly relates to a hydrogen fuel heat exchange system and method to solve the problems of unstable fuel supply and low overall energy utilization rate in the prior art. The hydrogen fuel heat exchange system comprises a hydrogen storage unit, a driving unit, a heat exchange unit, a combustion unit, a base, an air inlet pipeline, a first liquid inlet pipeline, a second liquid inlet pipeline and a feed pipeline, and the hydrogen storage unit, the driving unit, the heat exchange unit and the combustion unit are fixedly arranged on the base; the hydrogen storage unit is provided with a liquid inlet, the first liquid inlet pipeline is in communication with the liquid inlet of the hydrogen storage unit and used for conveying liquid hydrogen to the hydrogen storage unit, a first switch is arranged on the first liquid inlet pipeline, and the second liquid inlet pipeline is in communication with the driving unit; the liquid outlet of the driving unit is in communication with the heat exchange unit through the air inlet pipeline, and the heat exchange unit is used for gasifying the liquid hydrogen. The hydrogen fuel heat exchange system and method provided by the present disclosure are used for improving energy utilization rate.

Description

Technical Field

[0001] This disclosure relates to the field of hydrogen fuel technology, and more particularly to a heat exchange system and method for hydrogen fuel. Background Technology

[0002] In the process of moving towards zero carbon emissions and high efficiency in the aviation field, 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] Currently, traditional small-scale hydrogen fuel cell power generation systems face significant challenges in adapting to aero-engine applications. In the fuel supply stage, the storage and transportation of cryogenic liquid hydrogen has become a bottleneck restricting system performance. The stringent weight and space requirements of aero-flight necessitate that liquid hydrogen storage tanks meet extremely low-temperature storage conditions while achieving a lightweight and compact design, placing extremely high demands on the insulation materials and structural design of the tanks. Extensive vaporization of liquid hydrogen not only wastes energy but also increases system pressure, posing safety risks. Furthermore, in the extreme environment of high altitudes, the existing delivery pumps and piping systems are susceptible to drastic changes in air pressure and temperature during the stable transportation of liquid hydrogen from the storage tank to the engine combustor, leading to pressure fluctuations and unstable flow rates, making it difficult to guarantee the fuel supply required for stable aero-engine operation.

[0004] In terms of heat exchange, aero-engines have extremely high standards for energy conversion efficiency, and the heat exchange performance of existing systems is insufficient to meet these requirements. Traditional heat exchangers often employ a single heat source or inefficient heat exchange methods, which cannot rapidly vaporize liquid hydrogen and precisely heat it to the temperature required for combustion in aero-engines within a short time, resulting in incomplete combustion and insufficient power output. Simultaneously, in the high-altitude, low-temperature environment, heat loss during the heat exchange process is exacerbated, further reducing the overall energy utilization rate of the system and affecting the power performance and range of aero-engines.

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

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

[0007] According to one aspect of this disclosure, a heat exchange system for hydrogen fuel is provided. The heat exchange system for hydrogen fuel 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. The hydrogen storage unit, drive unit, heat exchange unit, and combustion unit are all fixedly mounted on the base. The hydrogen storage unit has a liquid inlet, and the first liquid inlet pipe is connected to the liquid inlet of the hydrogen storage unit for supplying liquid hydrogen to the hydrogen storage unit. A first switch is disposed 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 vaporize 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 vaporized hydrogen.

[0008] Furthermore, according to one aspect of the hydrogen fuel heat exchange system of this disclosure, the hydrogen fuel heat exchange system also includes a measuring component disposed on the feed pipe, the measuring component being used to monitor performance parameters within the heat exchange unit.

[0009] According to one aspect of the present disclosure, a heat exchange system for hydrogen fuel includes a first pre-tightening sub-unit for monitoring liquid hydrogen within the hydrogen storage unit, the first pre-tightening sub-unit being located on the inner wall of the hydrogen storage unit.

[0010] According to one aspect of the present disclosure, in a heat exchange system for hydrogen fuel, the gas 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 heat exchange system for hydrogen fuel further includes a monitoring unit located at the exhaust port of the combustion unit, the monitoring unit being used to monitor the gas concentration at the exhaust port.

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

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

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

[0015] According to another aspect of this disclosure, a heat exchange method for hydrogen fuel is provided, applied to the aforementioned hydrogen fuel heat exchange system, the heat exchange method for hydrogen fuel comprising:

[0016] With the heat exchange system of hydrogen fuel in normal operation, nitrogen and hydrogen are introduced into the gas inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe to complete the pipe cleaning.

[0017] The drive unit is activated to pressurize the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe, and to complete 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 the preset pressure value.

[0018] With the heat exchange unit in operation, the heat exchange unit is gradually heated to the preset temperature, and the physical parameters of the hydrogen fuel heat exchange system are collected when the heat exchange unit is at a stable temperature.

[0019] The flow rate into the heat exchange unit was changed, and the physical parameters of the hydrogen fuel heat exchange system were collected.

[0020] The collection process ends once the liquid hydrogen level in the hydrogen storage unit drops below the limit. The heating power of the heat exchange unit is gradually reduced until heating stops, and finally the heat exchange unit is shut down.

[0021] According to one aspect of the hydrogen fuel heat exchange method disclosed herein, under normal operating conditions of the hydrogen fuel heat exchange system, the process of purging the pipelines by introducing nitrogen and hydrogen into the inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe further includes:

[0022] When the hydrogen fuel heat exchange system is operating normally, a 1MPa liquid is introduced into the hydrogen fuel heat exchange system, flowing through the first liquid inlet pipe and the second liquid inlet pipe and into the heat exchange unit.

[0023] The at least one technical solution adopted in this embodiment can achieve the following beneficial effects: In the above-mentioned hydrogen fuel heat exchange system, the hydrogen storage unit, drive unit, heat exchange unit, and combustion unit are all fixedly mounted 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 provided 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 gas inlet pipe; the heat exchange unit is used to vaporize the liquid hydrogen; the heat exchange unit is connected to the combustion unit through the feed pipe; the combustion unit is used to burn the vaporized hydrogen. The units are connected in an orderly manner through the gas 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 vaporization, and then to the combustion unit for combustion. The entire process is smooth, ensuring that the system can stably convert liquid hydrogen into usable energy. Based on this, the heat exchange unit utilizes the engine's waste heat to heat and vaporize liquid hydrogen before supplying it to the combustion chamber for combustion. Simultaneously, the cooling effect of the liquid hydrogen can be used to cool hot-end engine components, thereby improving the overall thermal efficiency of the engine. The combustion unit burns the vaporized hydrogen, converting its chemical energy into heat and other forms of energy to provide power or heat to external equipment or systems, achieving efficient energy conversion and utilization. Furthermore, the drive unit controls the intake of the hydrogen storage unit, regulating the pressure and hydrogen flow rate within the storage unit, thus precisely controlling the overall system operation. When system malfunctions, the drive unit's operating status can be adjusted promptly to ensure safe system operation, maintain a stable fuel supply, and effectively solve the problems of unstable fuel supply and low overall energy utilization in existing technologies. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

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

[0027] Figure 3 This is a schematic flowchart illustrating a heat exchange method for hydrogen fuel according to an embodiment of the present disclosure.

[0028] Figure label:

[0029] 1 - Hydrogen storage unit, 2 - Drive unit, 3 - Heat exchange unit, 4 - Combustion unit, 5 - Measurement component, 6 - First liquid inlet pipe, 7 - Second liquid inlet pipe, 8 - First switch, 9 - Gas inlet pipe, 10 - Feed pipe, 11 - Base. Detailed Implementation

[0030] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

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

[0032] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below. It should be noted that the concepts of "first", "second", etc., used in this disclosure are only used to distinguish different devices, modules, or units, and are not intended to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0033] It should be noted that the terms "a" and "a plurality of" used in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

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

[0035] In the process of moving towards zero carbon emissions and high efficiency in the aviation field, 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] Currently, traditional small-scale hydrogen fuel cell power generation systems face significant challenges in adapting to aero-engine applications. In the fuel supply stage, the storage and transportation of cryogenic liquid hydrogen has become a bottleneck restricting system performance. The stringent weight and space requirements of aero-flight necessitate that liquid hydrogen storage tanks meet extremely low-temperature storage conditions while achieving a lightweight and compact design, placing extremely high demands on the insulation materials and structural design of the tanks. Extensive vaporization of liquid hydrogen not only wastes energy but also increases system pressure, posing safety risks. Furthermore, in the extreme environment of high altitudes, the existing delivery pumps and piping systems are susceptible to drastic changes in air pressure and temperature during the stable transportation of liquid hydrogen from the storage tank to the engine combustor, leading to pressure fluctuations and unstable flow rates, making it difficult to guarantee the fuel supply required for stable aero-engine operation.

[0037] In terms of heat exchange, aero-engines have extremely high standards for energy conversion efficiency, and the heat exchange performance of existing systems is insufficient to meet these requirements. Traditional heat exchangers often employ a single heat source or inefficient heat exchange methods, which cannot rapidly vaporize liquid hydrogen and precisely heat it to the temperature required for combustion in aero-engines within a short time, resulting in incomplete combustion and insufficient power output. Simultaneously, in the high-altitude, low-temperature environment, heat loss during the heat exchange process is exacerbated, further reducing the overall energy utilization rate of the system and affecting the power performance and range of aero-engines.

[0038] To address the aforementioned issues, this exemplary embodiment provides a heat exchange system and method for hydrogen fuel, thereby solving the problems of unstable fuel supply and low overall energy utilization rate of the system in the prior art.

[0039] The following will describe in detail, with reference to the accompanying drawings, a gas turbine full-state design method according to an embodiment of the present disclosure.

[0040] Figure 1 The figure shows a schematic diagram of the system structure of a heat exchange system for hydrogen fuel according to an embodiment of the present disclosure. Figure 2 This is a schematic diagram of the apparatus structure of a heat exchange system for hydrogen fuel according to an embodiment of the present disclosure. Figure 1 - Figure 2As shown, the hydrogen fuel heat exchange system 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, drive unit 2, heat exchange unit 3, and combustion unit 4 are all fixedly mounted on the base 11. The hydrogen storage unit 1 has a liquid inlet. It should be understood that the aforementioned hydrogen storage unit 1 can be a tank or a storage device of other structures or materials; specific details are not elaborated here. Taking a liquid hydrogen storage tank as an example, the aforementioned hydrogen storage unit 1 adopts a high-vacuum multi-layer insulation method to ensure that liquid hydrogen can be stored at a temperature of 20K. Cryogenic liquid hydrogen is added to the liquid hydrogen storage tank from a tank truck. During use, when the liquid hydrogen level in the liquid hydrogen storage tank falls below the minimum level, liquid hydrogen can be added again. Simultaneously, the aforementioned hydrogen storage unit 1 also has a hydrogen pressurization port to ensure the hydrogen pressure inside 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 supply liquid hydrogen to the hydrogen storage unit 1. The first switch 8 is located 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, pressurization equipment, etc., which will not be described in detail here. Taking a cryogenic liquid hydrogen pump as an example, it is used to pressurize the liquid hydrogen. The liquid outlet of the drive unit 2 is connected to the heat exchange unit 3 through the air inlet pipe 9. The heat exchange unit 3 is used to vaporize the liquid hydrogen. It can be understood that the above-mentioned heat exchange unit consists of multiple heat exchangers connected in parallel, using 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. The combustion unit 4 is used to burn the vaporized hydrogen.

[0041] In practical applications, such as Figure 1 - Figure 2 As shown, the units are connected in an orderly manner through the air intake pipe 9, the first liquid intake pipe 6, the second liquid intake pipe 7, and the feed pipe 10, forming a complete process from liquid hydrogen storage to combustion. Liquid hydrogen is smoothly transported from the hydrogen storage unit 1 to the heat exchange unit 3 for vaporization, and then to the combustion unit 4 for combustion. The entire 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 engine's waste heat to heat and vaporize the liquid hydrogen before supplying it to the combustion chamber for combustion. Simultaneously, the cooling effect 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 vaporized hydrogen, converting the chemical energy of the hydrogen into heat and other forms of energy to provide power or heat to external equipment or systems, achieving efficient energy conversion and utilization. Furthermore, by controlling the air intake of the hydrogen storage unit 1 through the drive unit 2, the pressure and hydrogen flow rate within the hydrogen storage unit 1 can be adjusted, thereby precisely controlling the operating status of the entire system. When the system malfunctions, the working state of drive unit 2 can be adjusted in a timely manner to ensure the safe operation of the system, ensure stable fuel supply, and effectively solve the problems of unstable fuel supply and low overall energy utilization rate of the system in the existing technology.

[0042] For example, such as Figure 1 As shown, the hydrogen fuel heat exchange system also includes a measuring component 5, which is located on the feed pipe. This measuring component 5 can be either a temperature sensor or a pressure sensor. The temperature sensor measures the medium temperature at the inlet and outlet of the heat exchange unit 3, while the pressure sensor measures 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 provide real-time monitoring of the pressure and temperature at the inlet and outlet of each device and in the pipelines. Furthermore, the feed pipe of the combustion unit 4 is equipped with a flow meter to measure the hydrogen flow rate.

[0043] For example, 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 located on the inner sidewall of the hydrogen storage unit.

[0044] In practical applications, the first pre-tightening subunit is installed on the inner wall of the hydrogen storage unit, enabling real-time monitoring of the pressure and stress exerted by liquid hydrogen on the sidewall. If potential hazards such as abnormally high pressure or uneven stress distribution are detected, timely measures can be taken to effectively prevent safety accidents such as explosions and leaks caused by improper liquid hydrogen storage, significantly improving the safety of the hydrogen storage unit. The first pre-tightening subunit on the inner wall can directly acquire critical information about the contact points between liquid hydrogen and the hydrogen storage unit. When a malfunction occurs in the hydrogen storage unit, this information provides crucial information for fault diagnosis, quickly locating the fault source and reducing troubleshooting time and difficulty. Simultaneously, based on the monitoring data, more reasonable maintenance plans can be developed, enabling preventative maintenance, avoiding sudden failures, and improving the reliability and availability of the hydrogen storage system.

[0045] For example, 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 aforementioned austenitic stainless steel material can be S316 stainless steel, 316L, or 304 stainless steel; these are not listed here. Taking S316 stainless steel as an example, since S316 stainless steel is an austenitic stainless steel and exhibits good performance in the liquid hydrogen temperature range, it has good compatibility with hydrogen. High-vacuum multilayer insulation technology is used to protect and treat the S316 stainless steel material.

[0046] For example, the heat exchange system for hydrogen fuel also includes a monitoring unit located at the exhaust port of the combustion unit. This monitoring unit monitors the gas concentration at the exhaust port. By monitoring the exhaust gas concentration, the combustion status of the hydrogen fuel can be understood in real time. If the hydrogen content in the exhaust gas is found to be too high, it indicates that the fuel is not burning completely. Combustion parameters can be adjusted accordingly, such as optimizing the air-hydrogen mixing ratio and improving the burner's operating conditions, to improve combustion efficiency, ensure full fuel utilization, and reduce energy waste.

[0047] For example, the heat exchange system for hydrogen fuel is a skid-mounted structure. The skid-mounted structure is assembled and commissioned in the factory, integrating the various units of the hydrogen fuel heat exchange system onto one or more skids. Upon arrival at the site, installation is completed simply by positioning and connecting the skids, significantly reducing 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 transport using trucks, trains, and other means. The skid-mounted structure also allows for optimized layout of each unit and piping of the hydrogen fuel heat exchange system, compactly integrating them onto the skids, effectively reducing the space occupied by the system. The skid-mounted structure has geometric dimensions of 3500mm × 2000mm × 2300mm. Integrating each unit onto a single skid makes the overall structure of the heat exchange system simpler and clearer, facilitating management and maintenance by operators and maintenance personnel. It also reduces the length of connecting pipes and lines between equipment, lowering the risk of leakage and energy loss.

[0048] For example, the hydrogen fuel heat exchange system also includes a second pre-tightening subunit, which is mounted on the base and is used to monitor the hydrogen concentration in the system. If the hydrogen concentration abnormally increases or a minor leak occurs, a warning signal can be issued promptly, allowing personnel to take appropriate measures before an accident occurs, thus effectively preventing it. Furthermore, continuous monitoring of the hydrogen concentration ensures that the heat exchange system operates within a safe hydrogen concentration range. When the concentration approaches a dangerous threshold, the system can automatically take protective measures, such as stopping the operation of the hydrogen fuel heat exchange system or activating ventilation devices, to prevent hydrogen accumulation to the explosion limit and ensure the safety of the entire heat exchange system and the surrounding environment.

[0049] This disclosure also provides a heat exchange method for hydrogen fuel. Figure 3 This is a schematic flowchart illustrating a heat exchange method for hydrogen fuel according to an embodiment of the present disclosure, as shown below. Figure 3 As shown, the heat exchange method for hydrogen fuel is applied to the aforementioned hydrogen fuel heat exchange system. The heat exchange method for hydrogen fuel includes:

[0050] S301: When the heat exchange system of hydrogen fuel is operating normally, nitrogen and hydrogen are introduced into the gas 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 drive unit to pressurize the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe, and complete 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 the preset pressure value.

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

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

[0054] S305: The collection ends after the liquid hydrogen in the hydrogen storage unit is below the limit position, and the heating power of the heat exchange unit is gradually reduced until heating stops, and finally the heat exchange unit is turned off.

[0055] For example, when the heat exchange system of hydrogen fuel is operating normally, the process of purging the pipelines by introducing nitrogen and hydrogen into the gas inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe also includes: when the heat exchange system of hydrogen fuel is operating normally, inputting 1 MPa of liquid into the heat exchange system of hydrogen fuel, flowing through the first liquid inlet pipe and the second liquid inlet pipe and inputting it into the heat exchange unit.

[0056] The above description is merely an embodiment of this disclosure and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of this disclosure is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features disclosed in this disclosure that have similar functions.

[0057] While specific embodiments of this disclosure have been described in detail by way of example, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of this disclosure. The scope of this disclosure is defined by the appended claims.

Claims

1. A heat exchange system for hydrogen fuel, 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, and a feed pipe. The hydrogen storage unit, drive unit, heat exchange unit, and combustion unit are all fixedly mounted on the base. The hydrogen storage unit has a liquid inlet, and the first liquid inlet pipe is connected to the liquid inlet of the hydrogen storage unit for supplying liquid hydrogen to the hydrogen storage unit. The first switch is located 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 vaporize 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 vaporized hydrogen. The heat exchange system for hydrogen fuel also includes a measuring component, which is located on the feed pipe and is used to monitor the performance parameters within the heat exchange unit. The hydrogen storage unit is also equipped with a first pre-tightening sub-unit for monitoring liquid hydrogen, and the first pre-tightening sub-unit is located on the inner wall of the hydrogen storage unit. The heat exchange system for the hydrogen fuel also includes a monitoring unit located at the exhaust port of the combustion unit, which is used to monitor the gas concentration at the exhaust port. The heat exchange system for the hydrogen fuel is a skid-mounted structure; The heat exchange system for hydrogen fuel also includes a second pre-tightening sub-unit, which is disposed on the base and is used to monitor the hydrogen concentration in the heat exchange system for hydrogen fuel.

2. The heat exchange system for hydrogen fuel 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.

3. The heat exchange system for hydrogen fuel according to claim 1, characterized in that, The geometric dimensions of the skid-mounted structure are 3500mm × 2000mm × 2300mm.

4. A heat exchange method for hydrogen fuel, applied to the heat exchange system for hydrogen fuel according to any one of claims 1-3, characterized in that, The heat exchange method for the hydrogen fuel includes: When the heat exchange system of the hydrogen fuel is operating normally, nitrogen and hydrogen are introduced into the gas inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe and the feed pipe to clean the pipes. The drive unit is activated to pressurize the air inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe, and to complete 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 the preset pressure value; With the heat exchange unit in operation, the heat exchange unit is gradually heated to a preset temperature, and the physical parameters of the heat exchange system of the hydrogen fuel are collected when the heat exchange unit is at a stable temperature. The flow rate into the heat exchange unit is changed, and the physical parameters of the heat exchange system for the hydrogen fuel are collected. The collection process ends once the liquid hydrogen level in the hydrogen storage unit drops below the limit. The heating power of the heat exchange unit is gradually reduced until heating stops, and finally the heat exchange unit is shut down.

5. The heat exchange method for hydrogen fuel according to claim 4, characterized in that, When the hydrogen fuel heat exchange system is operating normally, the process of purging the gas inlet pipe, the first liquid inlet pipe, the second liquid inlet pipe, and the feed pipe by introducing nitrogen and hydrogen also includes: When the heat exchange system for hydrogen fuel is operating normally, a 1MPa liquid is introduced into the heat exchange system for hydrogen fuel, flowing through the first liquid inlet pipe and the second liquid inlet pipe and into the heat exchange unit.

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