A vehicle-mounted hybrid system based on liquid organic hydrogen carrier hydrogen storage technology

Abstract

The present invention discloses a vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology, including a liquid organic hydrogen carrier, a hydrogen internal combustion engine, a hydrogen fuel cell, a dehydrogenation reactor, a hydrogen distribution device and a heat exchange system. The liquid organic hydrogen carrier can store and release hydrogen to provide hydrogen for the vehicle; the hydrogen internal combustion engine and the hydrogen fuel cell can provide hybrid power for the vehicle at the same time, or they can operate alternately to provide power for the vehicle. The dehydrogenation reactor is used for the hydrogen carrier to carry out a dehydrogenation reaction to generate hydrogen; the hydrogen distributor is used to reasonably distribute hydrogen to the hydrogen internal combustion engine and the hydrogen fuel cell; the heat exchange system can transfer the waste heat of the hydrogen internal combustion engine to the dehydrogenation reactor to maintain the dehydrogenation reaction. The present invention can realize the power supply for the vehicle based on the liquid organic hydrogen carrier hydrogen storage technology, reduce the energy loss caused by the direct combustion of hydrogen to provide heat for the dehydrogenation reactor, and improve the system operation efficiency and vehicle output power.

Description

Technical Field

[0001] The present invention belongs to the field of hydrogen energy technology, and in particular relates to a vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology. Background Art

[0002] In the future, the application of hydrogen energy in the transportation sector will gradually advance, forming a pattern of complementary development between fuel cell vehicles and rechargeable battery vehicles. Currently, fuel cell vehicles commonly use high-pressure gas cylinders to store hydrogen, with hydrogen storage pressures reaching 35-70 MPa and a mass hydrogen storage density of 1.1% to 4.3 wt%. Using high-pressure gas cylinders to store hydrogen poses a significant challenge to vehicle safety during driving. Furthermore, due to their low mass hydrogen storage density, the cylinders occupy a significant amount of interior space. Furthermore, high-pressure gas hydrogen storage requires dedicated hydrogen transportation facilities and refueling stations, resulting in significant initial infrastructure costs.

[0003] The use of liquid organic hydrogen carriers to store hydrogen can solve a series of problems caused by high-pressure gas hydrogen storage, achieve stable storage of hydrogen at room temperature and pressure, and its mass hydrogen storage density is high, reaching more than 6.5wt%. Liquid organic hydrogen carriers are compatible with current petrochemical equipment and can be refueled at gas stations without the need for additional infrastructure construction. The disadvantage of liquid organic hydrogen carriers is that their dehydrogenation reaction is an exothermic reaction. When it is applied to an on-board system to supply hydrogen to a fuel cell, an external heat source is required. If the hydrogen produced by the dehydrogenation reaction is directly burned to provide heat for the dehydrogenation reaction, a large amount of energy loss will be caused, reducing the operating efficiency of the system. Summary of the Invention

[0004] The purpose of the present invention is to address the existing technical problems and propose a hybrid power system that can achieve dehydrogenation of on-board liquid organic hydrogen carriers and improve system efficiency.

[0005] To achieve the above objectives, the present invention provides an on-vehicle hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology, comprising a hydride and hydrogen carrier storage tank, a hydride preheater, a dehydrogenation reactor, a hydrogen distribution device, a hydrogen internal combustion engine, a hydrogen fuel cell, and a heat exchange system; the hydride outlet of the hydride and hydrogen carrier storage tank is connected to the cold fluid inlet of the hydride preheater via a first pipeline, and the cold fluid outlet of the hydride preheater is connected to the feed inlet of the dehydrogenation reactor via a second pipeline; the hydrogen carrier outlet of the dehydrogenation reactor is connected to the hot fluid inlet of the hydride preheater via a third pipeline; the hot fluid outlet of the hydride preheater is connected to the hydrogen carrier inlet of the hydride and hydrogen carrier storage tank via a fourth pipeline; the gas phase outlet of the dehydrogenation reactor is connected to the inlet of a hydrogen compressor via a sixth pipeline, the outlet of the hydrogen compressor is connected to the inlet of the hydrogen distribution device via an eighth pipeline, the first outlet of the hydrogen distribution device is connected to the hydrogen internal combustion engine via a ninth pipeline, and the second outlet of the hydrogen distribution device is connected to the hydrogen fuel cell via a tenth pipeline; and a heat exchange system is provided between the dehydrogenation reactor and the hydrogen carrier.

[0006] Furthermore, the hydride and hydrogen carrier storage tank includes a shell, in which a hydride oil bag and a hydrogen carrier oil bag are arranged, and the hydride elastic oil bag and the hydrogen carrier oil bag are both made of elastic material.

[0007] Furthermore, the hydrogen distribution device includes a hydrogen cache tank, a signal sensor, a first flow meter, a second flow meter, a first solenoid valve, a second solenoid valve and a hydrogen pipeline; the hydrogen cache tank is connected to the hydrogen internal combustion engine through a ninth pipeline, and the first flow meter and the first solenoid valve are installed on the ninth pipeline; the hydrogen cache tank is connected to the hydrogen fuel cell through a tenth pipeline, and the second flow meter and the second solenoid valve are installed on the tenth pipeline; the signal sensor, the first flow meter, the second flow meter, the first solenoid valve and the second solenoid valve are all connected to the vehicle control system.

[0008] Furthermore, the heat exchange system includes a heat exchanger, a first gas pipeline, a second gas pipeline, a first thermal oil pipeline and a second thermal oil pipeline. The hot fluid inlet of the heat exchanger is connected to the inlet of the hydrogen internal combustion engine through the first gas pipeline, and the hot fluid outlet is connected to the second gas pipeline; the cold fluid inlet of the heat exchanger is connected to the inlet of the dehydrogenation reactor through the first thermal oil pipeline, and the cold fluid outlet is connected to the internal coil of the dehydrogenation reactor through the second thermal oil pipeline.

[0009] Furthermore, a third oil pump is provided on the first heat transfer oil pipeline, and a fourth oil pump is provided on the second heat transfer oil pipeline.

[0010] Furthermore, a hydrogen carrier cooling system is provided between the hydride preheater and the hydride and hydrogen carrier storage tanks. The hydrogen carrier cooling system includes a first fan and a hydrogen carrier cooler. The first fan is provided next to the hydrogen carrier cooler.

[0011] Furthermore, a hydrogen cooling system is provided between the dehydrogenation reactor and the hydrogen compressor. The hydrogen cooling system includes a second fan and a hydrogen cooler. The second fan is provided next to the hydrogen cooler.

[0012] Furthermore, the hydrogen carrier is one or a mixture of benzene, toluene, naphthalene, carbazole, ethylcarbazole, dibenzyltoluene, 1-methylindole, acridine, diphenylmethane, and biphenyl.

[0013] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0014] The present invention provides an on-vehicle hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology, which distributes hydrogen to a hydrogen internal combustion engine and a hydrogen fuel cell through a hydrogen distribution device to form a hybrid power system for the vehicle. The hydrogen internal combustion engine can provide power for the vehicle, and the waste heat of the internal combustion engine is used to heat a dehydrogenation reactor. Compared with directly burning hydrogen to heat the dehydrogenation reactor, the present invention improves the system energy efficiency by 6.98% to 9.27% ​​and the vehicle output power by 16.4% to 27.8%.

[0015] The present invention provides an on-vehicle hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology, which adopts liquid organic hydrogen carrier hydrogen storage technology to achieve stable storage of hydrogen at room temperature and pressure, and has the advantages of high mass hydrogen storage density, compatibility with current petrochemical equipment, and low investment in infrastructure construction. It can overcome the shortcomings of high-pressure gas hydrogen storage, such as low mass hydrogen storage density, high hydrogen storage pressure, and the need for large-scale hydrogen refueling station construction.

[0016] Furthermore, the hydride and hydrogen carrier storage tank includes a shell, in which a hydride oil bag and a hydrogen carrier oil bag made of elastic material are provided. The hydride oil bag and the hydrogen carrier oil bag can shrink or expand with the volume of the hydride or hydrogen carrier, thereby increasing the utilization rate of the vehicle space.

[0017] Furthermore, the hydrogen distribution device includes a hydrogen cache tank, a signal sensor, a first flow meter, a second flow meter, a first solenoid valve, a second solenoid valve and a hydrogen pipeline; the hydrogen cache tank is connected to the hydrogen internal combustion engine and the hydrogen fuel cell through a ninth pipeline and a tenth pipeline respectively, the ninth pipeline is equipped with a first flow meter and a first solenoid valve, and the tenth pipeline is equipped with a second flow meter and a second solenoid valve; the signal sensor, the first flow meter, the second flow meter, the first solenoid valve and the second solenoid valve are all connected to the vehicle control system; according to the vehicle operation conditions, by distributing the flow of hydrogen flowing into the hydrogen internal combustion engine and the hydrogen fuel cell, the power source of the vehicle can be reasonably selected to improve energy utilization.

[0018] Furthermore, the heat exchange system includes a heat exchanger, a first gas pipeline, a second gas pipeline, a first thermal oil pipeline and a second thermal oil pipeline. Through the heat exchange system, the waste heat of the hydrogen internal combustion engine can be transferred to the dehydrogenation reactor to maintain the dehydrogenation reaction without the need for an additional heating device, thereby further improving the energy efficiency of the entire system and reducing the complexity of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a vehicle hybrid system based on liquid organic hydrogen carrier hydrogen storage technology;

[0020] Figure 2 is a schematic diagram of the hydride and hydrogen carrier storage tanks;

[0021] Figure 3 is a schematic diagram of a hydrogen distribution device;

[0022] Figure 4 This is a schematic diagram of the heat exchange system between the hydrogen internal combustion engine and the dehydrogenation reactor;

[0023] Figure 5 is a schematic diagram of the hydrogen carrier cooling system;

[0024] Figure 6 is a schematic diagram of the hydrogen cooling system;

[0025] Figure 7 This is a schematic diagram of the hydrogenation process of liquid organic hydrogen carrier;

[0026] Figure 8 This is a comparison chart of the energy efficiency of hydrogen internal combustion engine heating and hydrogen burner heating systems;

[0027] Figure 9 This is a comparison chart of the system output power of hydrogen internal combustion engine heating and hydrogen burner heating.

[0028] In the accompanying drawings, 1-shell, 11-hydride oil bag, 12-hydrogen carrier oil bag. DETAILED DESCRIPTION

[0029] In order to make the purpose and technical solution of the present invention clearer and easier to understand, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0031] Liquid organic hydrogen carrier hydrogen storage technology utilizes a pair of reversible reactions (i.e., hydrogenation and dehydrogenation) between an unsaturated liquid organic hydrogen carrier and hydrogen to achieve hydrogen storage and release. Liquid organic hydrogen carriers are safe and convenient, capable of stable storage and transportation at room temperature and pressure. They can maximize the use of existing petrochemical infrastructure, making them suitable for large-scale, long-distance transportation. The mass hydrogen storage density reaches 6.5 to 8.5 wt%. Currently, liquid organic hydrogen carriers undergoing extensive research include toluene, benzene, naphthalene, N-ethylcarbazole, and dibenzyltoluene.

[0032] Reference Figure 1 , a vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology, including hydride and hydrogen carrier storage tanks, hydride preheater, dehydrogenation reactor, hydrogen distribution device, hydrogen internal combustion engine, hydrogen fuel cell, heat exchange system, hydrogen carrier cooling system and hydrogen cooling system.

[0033] like Figure 1As shown, the hydride outlet of the hydride and hydrogen carrier storage tank is connected to the inlet of the first oil pump, the outlet of the first oil pump is connected to the cold fluid inlet of the hydride preheater via a first pipeline, and the cold fluid outlet of the hydride preheater is connected to the feed port of the dehydrogenation reactor via a second pipeline. The hydrogen carrier outlet of the dehydrogenation reactor is connected to the hot fluid inlet of the hydride preheater via a third pipeline, and the second oil pump is provided on the third pipeline; the hot fluid outlet of the hydride preheater is connected to the inlet of the hydrogen carrier cooler via a fourth pipeline, and the outlet of the hydrogen carrier cooler is connected to the hydrogen carrier inlet of the hydride and hydrogen carrier storage tank via a fifth pipeline.

[0034] The gas phase outlet of the dehydrogenation reactor is connected to the inlet of the hydrogen cooler via a sixth pipeline. The outlet of the hydrogen cooler is connected to the inlet of the hydrogen compressor via a seventh pipeline. The outlet of the hydrogen compressor is connected to the inlet of the hydrogen distribution device via an eighth pipeline. The first outlet of the hydrogen distribution device is connected to the hydrogen internal combustion engine via a ninth pipeline. The second outlet of the hydrogen distribution device is connected to the hydrogen fuel cell via a tenth pipeline. Waste heat from the hydrogen internal combustion engine is fed into the dehydrogenation reactor via a heat exchange system to maintain the dehydrogenation reaction.

[0035] The working principle is:

[0036] Under the action of the first oil pump, the hydride flows from the hydride outlet of the hydride and hydrogen carrier storage tank through the first pipeline to the cold fluid inlet of the hydride preheater. After heat exchange, it flows out of the cold fluid outlet of the hydride preheater and enters the feed inlet of the dehydrogenation reactor through the second pipeline for dehydrogenation. The dehydrogenation reaction produces hydrogen and hydrogen carrier. The hydrogen carrier flows from the liquid phase outlet of the dehydrogenation reactor and, under the action of the second oil pump, enters the hot fluid inlet of the hydride preheater through the third pipeline. After heat exchange, it flows out of the hot fluid outlet of the hydride preheater, passes through the fourth pipeline to the inlet of the hydrogen carrier cooler, cools to ambient temperature, flows out of the hydrogen carrier cooler outlet, and flows through the fifth pipeline into the hydrogen carrier inlet of the hydride and hydrogen carrier storage tank. The hydrogen produced by the dehydrogenation reaction flows out of the dehydrogenation reactor's gas phase outlet, enters the hydrogen cooler inlet through the sixth pipeline, and after being cooled to the fuel cell's operating temperature, flows out of the hydrogen cooler outlet. It then flows through the seventh pipeline to the hydrogen compressor. After being pressurized by the hydrogen compressor, it enters the hydrogen distribution device through the eighth pipeline. Under the control of the vehicle control system, some of the hydrogen enters the hydrogen internal combustion engine through the ninth pipeline, and the remaining portion enters the hydrogen fuel cell through the tenth pipeline. Waste heat from the hydrogen internal combustion engine is fed into the dehydrogenation reactor through a heat exchange system to maintain the dehydrogenation reaction.

[0037] Under the control of the vehicle control system, the hydrogen internal combustion engine and hydrogen fuel cell can simultaneously provide hybrid power for the vehicle, or they can operate alternately to provide power. When the hydrogen buffer tank is not full and the vehicle is traveling on complex roads or other conditions requiring higher power, the hydrogen internal combustion engine and hydrogen fuel cell can jointly power the vehicle. When the hydrogen buffer tank is not full and the vehicle is traveling on smooth roads, the hydrogen internal combustion engine can power the vehicle alone. When the hydrogen buffer tank is full and the vehicle is traveling on smooth roads, the hydrogen internal combustion engine can be shut down, and the hydrogen fuel cell can power the vehicle alone.

[0038] The hydride and hydrogen carrier storage tank is used to store the hydride before the dehydrogenation reaction and the hydrogen carrier after the dehydrogenation reaction.

[0039] Figure 2 As shown, the hydride and hydrogen carrier storage tank consists of an external hard shell 1 and an internal hydride oil bag 11 and a hydrogen carrier oil bag 12. The hydride elastic oil bag 11 and the hydrogen carrier oil bag 12 are both made of elastic materials and can shrink and expand as the hydride decreases and the hydrogen carrier increases, thereby increasing the utilization rate of the vehicle space. When the car is filled with hydride, the hydride elastic oil bag 11 is in a maximum expansion state, almost occupying the entire internal space of the hydride and hydrogen carrier storage tank. During the driving process of the car, the hydride is continuously consumed and converted into hydrogen carrier. The hydride elastic oil bag gradually shrinks and the hydrogen carrier elastic oil bag gradually expands. At the filling station, the car extracts the hydrogen carrier from the hydrogen carrier elastic oil bag and refills new hydride into the hydride elastic oil bag. The hydride preheater is used for preheating before the hydride dehydrogenation reaction and recovering the waste heat of the hydrogen carrier generated by the dehydrogenation reaction.

[0040] The dehydrogenation reactor is used for dehydrogenation reaction of hydride to produce hydrogen and hydrogen carrier.

[0041] like Figure 3 As shown, the hydrogen distribution device includes a hydrogen cache tank, a signal sensor, a first flow meter, a second flow meter, a first solenoid valve, a second solenoid valve and a hydrogen pipeline.

[0042] The hydrogen buffer tank is connected to the hydrogen internal combustion engine via the ninth pipeline, which is equipped with a first flowmeter and a first solenoid valve. The hydrogen buffer tank is connected to the hydrogen fuel cell via the tenth pipeline, which is equipped with a second flowmeter and a second solenoid valve. The signal sensor, the first and second flowmeters, and the first and second solenoid valves are all connected to the vehicle control system. The first flowmeter measures the hydrogen flow to the hydrogen internal combustion engine, while the second flowmeter measures the hydrogen flow to the hydrogen fuel cell.

[0043] The hydrogen buffer tank is used to store the hydrogen produced by the dehydrogenation reaction, and the signal sensor is used to monitor the amount of hydrogen in the hydrogen buffer tank in real time. With the cooperation of the two flow meters and the vehicle control system, the hydrogen is reasonably distributed to the hydrogen internal combustion engine and the hydrogen fuel cell by controlling the opening or closing of the first solenoid valve and / or the second solenoid valve.

[0044] Under the control of the vehicle control system, the hydrogen distribution device simultaneously distributes hydrogen to the hydrogen internal combustion engine and the hydrogen fuel cell to provide power for the vehicle. Alternatively, a portion of the hydrogen can be distributed to the hydrogen internal combustion engine first, while the remaining portion is stored in a hydrogen buffer tank. After the hydrogen internal combustion engine is shut down, all the hydrogen is distributed to the fuel cell. When the hydrogen in the hydrogen buffer tank is consumed to a critical value, the hydrogen engine is restarted, continuing the cycle, with the hydrogen internal combustion engine and hydrogen fuel cell working alternately to provide power for the vehicle.

[0045] like Figure 4 As shown, the heat exchange system includes a heat exchanger, a gas pipeline, a thermal oil pipeline, a third oil pump, and a fourth oil pump. The heat exchanger's hot fluid inlet is connected to the hydrogen internal combustion engine's inlet via a first gas pipeline, and the hot fluid outlet is connected to a second gas pipeline. The cold fluid inlet is connected to the dehydrogenation reactor's inlet via a first thermal oil pipeline, and the cold fluid outlet is connected to the dehydrogenation reactor's internal coil via a second thermal oil pipeline. The first thermal oil pipeline is equipped with a third oil pump, and the second thermal oil pipeline is equipped with a fourth oil pump.

[0046] The heat exchange system operates as follows: high-temperature exhaust gas generated by the hydrogen internal combustion engine enters the heat exchanger's hot fluid inlet through a first gas pipeline. Low-temperature thermal oil, driven by a third oil pump, flows through the first thermal oil pipeline and into the heat exchanger's cold fluid inlet. Heat is exchanged between the two in the heat exchanger. The high-temperature thermal oil flows out of the heat exchanger's cold fluid outlet and, driven by a fourth oil pump, flows through a second thermal oil pipeline into the dehydrogenation reactor's internal coils, exchanging heat with the hydride. The low-temperature exhaust gas flows out of the heat exchanger's hot fluid outlet and is discharged through a second gas pipeline. Through the heat exchange system, waste heat from the hydrogen internal combustion engine is transferred to the dehydrogenation reactor to maintain the dehydrogenation reaction.

[0047] like Figure 1 and Figure 5 As shown, the hydrogen carrier cooling system includes a blower 1, a hydrogen carrier cooler, and a hydride pipeline. The first blower is located next to the hydrogen carrier cooler. Under the action of the first blower, the hydrogen carrier flowing into the hydrogen carrier cooler through the fourth pipeline is further cooled to ambient temperature and then flows through the fifth pipeline into the hydrogen carrier inlet of the hydride and hydrogen carrier storage tank.

[0048] like Figure 1 and Figure 6As shown, the hydrogen cooling system includes a second fan, a hydrogen cooler and a gas pipeline. The second fan is arranged next to the hydrogen cooler. Under the action of the second fan, the hydrogen flowing into the hydrogen cooler through the sixth pipeline is cooled to the operating temperature of the fuel cell and then enters the hydrogen distribution device through the seventh pipeline.

[0049] Before use, the system needs to be hydrogenated. Figure 7 As shown in the figure, the hydrogenation process is as follows: hydrogen is pressurized to the hydrogenation reaction pressure by a compressor, heated in a hydrogen preheater, and then fed into the hydrogenation reactor. Simultaneously, a hydrogen carrier is heated in the hydrogen carrier preheater and then fed into the hydrogenation reactor. Both are further heated to the reaction temperature in the hydrogenation reactor, where a hydrogenation reaction occurs. After hydrogenation, the hydrogen carrier becomes a hydride. Because the hydrogenation reaction is highly exothermic, circulating water is used to absorb the residual heat of the reaction and use it to heat the hydrogen in the hydrogen preheater. After the hydride passes through the hydrogen carrier preheater and recovers some of its residual heat, it is fed into a hydride cooler to cool to ambient temperature before entering a hydride storage tank. The hydride is transported by tanker truck to a filling station and then filled into vehicles.

[0050] like Figure 1 As shown, in the onboard system, the hydride in the hydride and hydrogen carrier tanks is heated in a hydride preheater and then enters the dehydrogenation reactor where it is further heated to the reaction temperature for the dehydrogenation reaction. The dehydrogenation reaction produces two substances: hydrogen and hydrogen carrier. The hydrogen carrier flows out of the liquid phase outlet of the dehydrogenation reactor and enters the hydride preheater to recover some of the waste heat. After heat exchange, it enters the hydrogen carrier to cool to ambient temperature and then returns to the hydrogen carrier elastic oil bag in the hydride and hydrogen carrier tanks. The hydrogen produced by the dehydrogenation reaction flows out of the gas phase outlet of the dehydrogenation reactor, passes through the hydrogen cooler to the operating temperature of the fuel cell, enters the hydrogen compressor for pressurization, and then enters the hydrogen distribution device. Under the control of the vehicle control system, part of the hydrogen enters the hydrogen internal combustion engine, and the rest enters the hydrogen fuel cell. The waste heat of the hydrogen internal combustion engine is transferred to the dehydrogenation reactor through a heat exchange system to maintain the dehydrogenation reaction.

[0051] Implementation plan:

[0052] Energy efficiency calculations were conducted on ten liquid organic hydrogen carriers, including benzene, toluene, naphthalene, carbazole, ethylcarbazole, dibenzyltoluene, 1-methylindole, acridine, diphenylmethane, and biphenyl, as fuels for hydrogen internal combustion engines and hydrogen burners. The calculation results are as follows: Figure 8 and Figure 9 By comparison, compared with directly burning hydrogen to provide heat for the dehydrogenation reactor, the present invention improves system energy efficiency by 6.98% to 9.27% ​​and vehicle output power by 16.4% to 27.8%.

[0053] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology, characterized in that: It includes hydride and hydrogen carrier storage tanks, hydride preheater, dehydrogenation reactor, hydrogen distribution device, hydrogen internal combustion engine, hydrogen fuel cell and heat exchange system; The hydride outlet of the hydride and hydrogen carrier storage tank is connected to the cold fluid inlet of the hydride preheater through a first pipeline, and the cold fluid outlet of the hydride preheater is connected to the feed port of the dehydrogenation reactor through a second pipeline; the hydrogen carrier outlet of the dehydrogenation reactor is connected to the hot fluid inlet of the hydride preheater through a third pipeline; and the hot fluid outlet of the hydride preheater is connected to the hydrogen carrier inlet of the hydride and hydrogen carrier storage tank through a fourth pipeline; The gas phase outlet of the dehydrogenation reactor is connected to the inlet of the hydrogen compressor via a sixth pipeline, the outlet of the hydrogen compressor is connected to the inlet of the hydrogen distribution device via an eighth pipeline, the first outlet of the hydrogen distribution device is connected to the hydrogen internal combustion engine via a ninth pipeline, and the second outlet of the hydrogen distribution device is connected to the hydrogen fuel cell via a tenth pipeline; a heat exchange system is provided between the hydrogen internal combustion engine and the dehydrogenation reactor; The hydride and hydrogen carrier storage tank comprises a shell (1), wherein a hydride oil bag (11) and a hydrogen carrier oil bag (12) are provided in the shell (1), and the hydride oil bag (11) and the hydrogen carrier oil bag (12) are both made of elastic material; The heat exchange system includes a heat exchanger, a first gas pipeline, a second gas pipeline, a first thermal oil pipeline, and a second thermal oil pipeline. The hot fluid inlet of the heat exchanger is connected to the inlet of the hydrogen internal combustion engine through the first gas pipeline, and the hot fluid outlet is connected to the second gas pipeline; the cold fluid inlet of the heat exchanger is connected to the inlet of the dehydrogenation reactor through the first thermal oil pipeline, and the cold fluid outlet is connected to the internal coil of the dehydrogenation reactor through the second thermal oil pipeline.

2. The vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology according to claim 1, characterized in that: The hydrogen distribution device includes a hydrogen cache tank, a signal sensor, a first flow meter, a second flow meter, a first solenoid valve, a second solenoid valve and a hydrogen pipeline; the hydrogen cache tank is connected to the hydrogen internal combustion engine through a ninth pipeline, and the first flow meter and the first solenoid valve are installed on the ninth pipeline; the hydrogen cache tank is connected to the hydrogen fuel cell through a tenth pipeline, and the second flow meter and the second solenoid valve are installed on the tenth pipeline; the signal sensor, the first flow meter, the second flow meter, the first solenoid valve and the second solenoid valve are all connected to the vehicle control system.

3. The vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology according to claim 1, characterized in that: The first heat transfer oil pipeline is provided with a third oil pump, and the second heat transfer oil pipeline is provided with a fourth oil pump.

4. The vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology according to claim 1, characterized in that: A hydrogen carrier cooling system is provided between the hydride preheater and the hydrogen carrier storage tank. The hydrogen carrier cooling system includes a first fan and a hydrogen carrier cooler. The first fan is provided next to the hydrogen carrier cooler.

5. The vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology according to claim 1, characterized in that: A hydrogen cooling system is provided between the dehydrogenation reactor and the hydrogen compressor. The hydrogen cooling system comprises a second fan and a hydrogen cooler. The second fan is provided beside the hydrogen cooler.

6. The vehicle-mounted hybrid power system based on liquid organic hydrogen carrier hydrogen storage technology according to claim 1, characterized in that: The hydrogen carrier is one or a mixture of benzene, toluene, naphthalene, carbazole, ethylcarbazole, dibenzyltoluene, 1-methylindole, acridine, diphenylmethane, and biphenyl.

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