Compressed air energy storage device based on internal combustion engine

Abstract

The invention relates to the technical field of power energy, and discloses a compressed air energy storage device based on an internal combustion engine, which comprises an internal combustion engine set part and an air storage tank part, and the air storage tank part is arranged around the internal combustion engine set part; the internal combustion engine set comprises an air inlet pipe, one end of the air inlet pipe is fixedly connected with a first air inlet manifold, the middle of the first air inlet manifold is fixedly connected with an air storage pipe, an air storage valve is installed between the first air inlet manifold and the air storage pipe, and the middle of the air storage pipe is fixedly connected with a buffer chamber and a buffer valve. An air inlet control assembly is arranged at the end, away from the air inlet pipe, of the first air inlet manifold and used for controlling the air inlet amount. And through cooperation of the air inlet pipe and the air inlet manifold, the flow of air entering the air cylinder can be effectively adjusted, and the combustion process is more uniform. Particularly, due to the arrangement of the gas storage pipe, part of inlet gas can be recycled under the condition that the combustion efficiency is not affected, and proper adjustment is conducted through the gas storage valve.

Description

Technical Field

[0001] The present invention relates to the field of power energy technology, and in particular to a compressed air energy storage device based on an internal combustion engine. Background Art

[0002] The internal combustion engine, a widely used power device, has played a vital role in numerous fields. It is a core power source that converts chemical energy into mechanical energy by burning fuel, and is widely used in transportation, industrial equipment, and generator sets. The advantages of the internal combustion engine lie in its high power output, strong flexibility, and rapid start-up, which have led to its widespread application in various machinery and transportation fields. Especially in large-scale and high-load situations, the internal combustion engine can provide powerful power support to meet the needs of various working environments.

[0003] In practical applications, excessively high boost pressures also present numerous challenges that should not be overlooked. First, the mechanical strength of the cylinder is limited. As boost pressure continues to increase, the combustion pressure and temperature inside the cylinder also rise, which can easily lead to combustion instability. Detonation not only causes localized overheating in the combustion chamber, impacting the engine's combustion efficiency, but also causes abnormal wear of components and even severe mechanical damage. Furthermore, during startup, high boost pressures can easily lead to excessive air entering the cylinder, reducing fuel atomization and complicating the combustion process, making starting more difficult. This can significantly impact engine ignition and combustion stability, especially in low-temperature environments. Summary of the Invention

[0004] In response to the shortcomings of the existing technology, the present invention provides a compressed air energy storage device based on an internal combustion engine, which solves the problems in the existing technology such as unstable combustion, increased risk of deflagration, difficulty in starting and shortened life of mechanical components caused by excessive boost pressure.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a compressed air energy storage device based on an internal combustion engine, comprising an internal combustion engine unit and an air storage tank unit, wherein the air storage tank unit is installed around the internal combustion engine unit; The internal combustion engine unit includes an intake pipe, one end of the intake pipe is fixedly connected to an intake manifold 1, the middle of the intake manifold 1 is fixedly connected to an air storage pipe, an air storage valve is installed between the intake manifold 1 and the air storage pipe, the middle of the air storage pipe is fixedly connected to a buffer chamber and a buffer valve, and an end of the intake manifold 1 away from the intake pipe is provided with an intake control component, which is used to control the intake amount.

[0006] Preferably, the gas storage tank portion includes a gas storage tank body, the gas storage tank body is fixedly connected to one end of the gas storage pipe, and the buffer valve is located between the gas storage pipe and the gas storage tank body.

[0007] Preferably, the air intake control assembly comprises a cylinder fixedly connected to one end of the air intake pipe, an air intake valve is installed and connected between the cylinder and the air intake pipe, and an air outlet valve is installed on the side of the cylinder away from the air intake valve.

[0008] Preferably, the air intake valve is specifically provided with two air intake valves, one of which is fixedly connected to one end of the air intake pipe, and the other of which is fixedly connected to one end of the air intake manifold.

[0009] Preferably, the air outlet valve is specifically provided with two air outlet valves, both of which are installed on one side of the cylinder, and both of which are fixedly connected to the exhaust pipe away from the cylinder.

[0010] Preferably, a piston is slidably connected to the middle of the cylinder, and a connecting rod is rotatably connected to the bottom of the piston.

[0011] Preferably, a pressure sensor is installed in the middle of the buffer chamber and the gas storage tank body, and a temperature sensor and a pressure sensor for monitoring the working state in the cylinder are installed at the top of the cylinder.

[0012] Preferably, the cylinder undergoes a combustion process, and the gas pushes the piston to expand, and the completely expanded gas is discharged from the air outlet valve to the exhaust pipe and then to the environment.

[0013] The application also provides a compressed air energy storage method based on an internal combustion engine, comprising the following steps: S1, air intake control: air first enters the compressed air energy storage, in this process, the air intake controls the air intake according to the demand, ensures that the air flow and pressure are within a reasonable range, and adjusts the air intake according to the working state and energy demand; the air flow needs to be further adjusted by the air energy storage device before entering the cylinder; S2, air compression: the air after the air intake control enters the internal combustion engine and is compressed, and with the compression movement, the volume of the air decreases and the pressure increases; in this process, the air is gradually compressed to a preset high pressure state by mechanical action, and the temperature of the gas increases in the compression process; the duration and degree of the compression process are adjusted according to the preset working state; S3, air energy storage: when the air reaches the set high pressure state, the compressed air after compression is introduced into the gas storage space for storage, and in the gas storage process, the stored compressed air is saved in a predetermined pressure range for subsequent release; S4. Gas Expansion and Energy Release: When the stored energy needs to be released, compressed air is released from the gas storage space. After a series of adjustments, the air enters the combustion chamber. At this time, the fuel and compressed air mix and burn, and the generated high-temperature gas expands rapidly. The expanding gas exerts pressure on the piston, driving the piston to move, thereby releasing the stored energy. S5. Exhaust gas emission: After the expansion process is completed, the exhaust gas after combustion will be discharged; the exhaust flow rate and rate will be adjusted according to the actual working conditions; S6, air replenishment and regulation: When additional air support is needed, the stored high-pressure air will be released from the air storage space. The air replenishment process ensures that the internal combustion engine can obtain sufficient power support under high load conditions to maintain overall operational stability; S7. Energy recovery: During the compression and expansion process, a portion of the air returns to the air storage space through the regulated return pipe. By adjusting the flow rate of the return air, part of the energy is recovered, and the excess energy is converted into high-pressure air and stored again.

[0014] 1. Through the coordination of the intake pipe and intake manifold, this invention effectively regulates the air flow entering the cylinder, ensuring a more uniform combustion process. In particular, the configuration of the air storage pipe allows for partial air recovery without affecting combustion efficiency, allowing for appropriate regulation via the air storage valve. Compared to traditional direct air intake methods, this avoids combustion instability and the risk of detonation, resulting in smoother engine operation and reduced wear and tear on mechanical components.

[0015] 2. By combining an air storage pipe with an air tank, this invention can store high-pressure air during low loads and release it during high loads to provide additional power support. Furthermore, the use of a buffer chamber and buffer valve further stabilizes airflow pressure fluctuations, avoiding energy waste. Compared to traditional internal combustion engines that rely directly on fuel for energy, this improves energy utilization and effectively reduces fuel consumption.

[0016] 3. This invention installs pressure sensors in the buffer chamber and the middle of the gas storage tank to monitor the gas status in real time, ensuring that the gas pressure remains within a reasonable range. Furthermore, temperature and pressure sensors are installed at the top of the cylinder to precisely control the combustion environment within the cylinder. Compared to traditional single mechanical adjustment methods, this significantly reduces the safety risks associated with overpressure or overheating, and improves system reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A perspective view of the device of the present invention; Figure 2 Schematic diagram of the method of the present invention.

[0018] Among them, 1. Connecting rod; 2. Piston; 4. Exhaust valve; 3. Cylinder; 5. Exhaust pipe; 6. Intake pipe; 8. Intake manifold 1; 9. Gas tank body; 10. Buffer valve; 11. Buffer chamber; 12. Gas storage pipe; 13. Intake valve; 14. Gas storage valve. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the specification of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] Example: Please see the attached Figure 1 An embodiment of the present invention provides a compressed air energy storage device based on an internal combustion engine, including an internal combustion engine unit and an air storage tank unit, wherein the air storage tank unit is installed around the internal combustion engine unit; the internal combustion engine unit includes an intake pipe 6, one end of the intake pipe 6 is fixedly connected to an intake manifold 8, the middle of the intake manifold 8 is fixedly connected to an air storage pipe 12, an air storage valve 14 is installed between the intake manifold 8 and the air storage pipe 12, the middle of the air storage pipe 12 is fixedly connected to a buffer chamber 11 and a buffer valve 10, and an intake control component is provided at the end of the intake manifold 8 away from the intake pipe 6, which is used to control the intake amount.

[0021] Intake pipe 6 and intake manifold 8 facilitate air intake and provide air distribution, while air storage pipe 12 recovers some of the intake air without affecting combustion efficiency and adjusts it appropriately via air storage valve 14. Compared to traditional direct air intake, this avoids combustion instability and the risk of detonation, ensuring smoother engine operation. The buffer chamber 11 and buffer valve 10 effectively reduce airflow shock, preventing damage to the engine from transient pressure fluctuations, and ensuring smoother air delivery.

[0022] Please see the attached Figure 1 The gas tank part includes a gas tank body 9, which is fixedly connected to one end of a gas storage pipe 12, and a buffer valve 10 is located between the gas storage pipe 12 and the gas tank body 9.

[0023] The gas storage tank body 9 can conveniently store gas, store high-pressure air at low load, and release it at high load to provide additional power support. At the same time, the airflow can be adjusted by the action of the buffer valve 10 to avoid energy waste.

[0024] Please see the attached Figure 1The intake control component includes a cylinder 3, which is fixedly connected to one end of the intake pipe 6. An intake valve 13 is installed between the cylinder 3 and the intake pipe 6, and an outlet valve 4 is installed on the side of the cylinder 3 away from the intake valve 13; there are specifically two intake valves 13, one of which is fixedly connected to one end of the intake pipe 6, and the other is fixedly connected to one end of the intake manifold 8.

[0025] The two intake valves 13 can flexibly adjust the intake path under different working conditions, thereby improving the overall adaptability of the internal combustion engine.

[0026] Please see the attached Figure 1 There are two outlet valves 4, both of which are installed on one side of the cylinder 3. The sides of the two outlet valves 4 away from the cylinder 3 are fixedly connected to the exhaust pipe 5; the middle part of the cylinder 3 is slidably connected to the piston 2, and the bottom of the piston 2 is rotatably connected to the connecting rod 1.

[0027] The two outlet valves 4 can conveniently adjust the outlet volume and outlet path, thereby improving the overall adaptability of the internal combustion engine, and the air flow can be conveniently discharged through the exhaust pipe 5. When the connecting rod 1 works, it will drive the piston 2 to move up and down, thereby facilitating the compression of the air.

[0028] Please see the attached Figure 1 Pressure sensors are installed in the middle of the buffer chamber 11 and the gas storage tank body 9, and a temperature sensor and a pressure sensor for monitoring the working status in the cylinder are installed on the top of the cylinder 3.

[0029] Please see the attached Figure 1 , the combustion process occurs in the cylinder 3, the gas will push the piston 2 to expand, and finally the fully expanded gas outlet valve 4 is discharged into the exhaust pipe 5, and then discharged into the environment.

[0030] The compressed air energy storage method based on an internal combustion engine described below and the compressed air energy storage device based on an internal combustion engine described above can be referenced to each other.

[0031] Please see the attached Figure 2 This embodiment further provides a control method for the compressed air energy storage device based on an internal combustion engine, comprising the following steps: S1, air intake control: air first enters the compressed air energy storage. During this process, the air intake is controlled according to demand to ensure that the air flow and pressure are within a reasonable range. The air intake is adjusted according to the working state and energy demand. Before entering cylinder 3, the air flow needs to be further regulated by the air energy storage device; S2, air compression: the air after intake control enters the internal combustion engine and is compressed. With the compression movement, the volume of the air decreases, and the pressure increases accordingly. In this process, the air is gradually compressed to a preset high pressure state through mechanical action, and the temperature of the gas increases during the compression process. The duration and degree of the compression process are adjusted according to the preset working state; S3, air energy storage: when the air reaches the set high pressure state, the compressed air is introduced into the air storage space for storage. In the storage process, the stored compressed air will be kept within a predetermined pressure range for subsequent release; S4, gas expansion and energy release: when the stored energy needs to be released, the compressed air will be released from the air storage space. After a series of adjustments, the air enters the combustion chamber. At this time, the fuel and compressed air are mixed and burned, and the generated high-temperature gas expands rapidly. The expanded gas exerts pressure on the piston 2, driving the piston 2 to move, thereby releasing the stored energy; S5, exhaust gas emission: after the expansion process is completed, the burned exhaust gas will be discharged. The flow rate and speed of the exhaust gas will be adjusted according to the actual working state requirements; S6, air supplement and adjustment: when additional air support is needed, the stored high-pressure air will be released from the air storage space. The air supplement process ensures that the internal combustion engine can obtain sufficient power support under high load conditions to maintain the stability of the overall operation; S7, energy recovery: during the compression and expansion processes, part of the air returns to the air storage space through the adjustment return pipeline. By adjusting the flow of the return air, part of the energy is recovered, and the excess energy is converted into high-pressure air and stored again.

[0032] The method of the embodiment can be used to execute the above-mentioned device embodiment, and the principles and technical effects are similar, which will not be repeated here.

[0033] Although embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A compressed air energy storage device based on an internal combustion engine, characterized in that: It includes an internal combustion engine unit and a gas storage tank unit, wherein the gas storage tank unit is installed around the internal combustion engine unit; The internal combustion engine unit includes an intake pipe (6), one end of the intake pipe (6) is fixedly connected to an intake manifold (8), the middle of the intake manifold (8) is fixedly connected to an air storage pipe (12), an air storage valve (14) is installed between the intake manifold (8) and the air storage pipe (12), the middle of the air storage pipe (12) is fixedly connected to a buffer chamber (11) and a buffer valve (10), and an intake control component is provided at one end of the intake manifold (8) away from the intake pipe (6), which is used to control the intake amount.

2. A compressed air energy storage device based on an internal combustion engine according to claim 1, characterized in that: The gas storage tank portion comprises a gas storage tank body (9), the gas storage tank body (9) is fixedly connected to one end of the gas storage pipe (12), and the buffer valve (10) is located between the gas storage pipe (12) and the gas storage tank body (9).

3. A compressed air energy storage device based on an internal combustion engine according to claim 2, characterized in that: The air intake control assembly comprises a cylinder (3), the cylinder (3) being fixedly connected to one end of the air intake pipe (6), an air intake valve (13) being installed and connected between the cylinder (3) and the air intake pipe (6), and an air outlet valve (4) being installed on a side of the cylinder (3) away from the air intake valve (13).

4. A compressed air energy storage device based on an internal combustion engine according to claim 3, characterized in that: Specifically, two intake valves (13) are provided, wherein one intake valve (13) is fixedly connected to one end of the intake pipe (6), and the other intake valve (13) is fixedly connected to one end of the intake manifold (8).

5. A compressed air energy storage device based on an internal combustion engine according to claim 3, characterized in that: Specifically, two of the air outlet valves (4) are provided. Both of the air outlet valves (4) are installed on one side of the cylinder (3). The sides of the two air outlet valves (4) away from the cylinder (3) are fixedly connected to an exhaust pipe (5).

6. A compressed air energy storage device based on an internal combustion engine according to claim 3, characterized in that: The middle of the cylinder (3) is slidably connected to a piston (2), and the bottom of the piston (2) is rotatably connected to a connecting rod (1).

7. A compressed air energy storage device based on an internal combustion engine according to claim 3, characterized in that: Pressure sensors are installed in the middle of the buffer chamber (11) and the gas storage tank body (9), and a temperature sensor and a pressure sensor for monitoring the working state in the cylinder are installed on the top of the cylinder (3).

8. A compressed air energy storage device based on an internal combustion engine according to claim 5, characterized in that: The combustion process occurs in the cylinder (3), and the gas pushes the piston (2) to expand, and finally the fully expanded gas is discharged from the gas outlet valve (4) into the exhaust pipe (5) and then discharged into the environment.

9. A compressed air energy storage method based on an internal combustion engine, according to a compressed air energy storage device based on an internal combustion engine according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Intake control: The air first enters the compressed air energy storage. During this process, the intake volume is controlled according to demand to ensure that the air flow and pressure are within a reasonable range. The intake volume is adjusted according to the working state and energy demand. Before the air flow enters the cylinder (3), it needs to be further adjusted by the air energy storage device; S2. Air compression: After the intake control, the air enters the internal combustion engine and is compressed. As the air is compressed, the volume of the air decreases and the pressure increases. During this process, the air is gradually compressed to a preset high pressure state through mechanical action, and the temperature of the gas increases during the compression process. The duration and degree of the compression process are adjusted according to the preset working state; S3, air energy storage: When the air reaches the set high pressure state, the compressed air is introduced into the air storage space for storage. During the air storage process, the stored compressed air will be kept within the predetermined pressure range for subsequent release; S4. Gas expansion and energy release: When the stored energy needs to be released, the compressed air is released from the gas storage space. After a series of adjustments, the air enters the combustion chamber. At this time, the fuel and the compressed air mix and burn, and the generated high-temperature gas expands rapidly. The expanded gas exerts pressure on the piston (2), driving the piston (2) to move, thereby releasing the stored energy. S5. Exhaust gas emission: After the expansion process is completed, the exhaust gas after combustion will be discharged; the exhaust flow rate and rate will be adjusted according to the actual working conditions; S6, air replenishment and regulation: When additional air support is needed, the stored high-pressure air will be released from the air storage space. The air replenishment process ensures that the internal combustion engine can obtain sufficient power support under high load conditions to maintain overall operational stability; S7, Energy Recovery: During the compression and expansion process, a portion of the air returns to the air storage space through the regulated return pipe; By adjusting the flow rate of return air, part of the energy can be recovered, and the excess energy can be converted into high-pressure air and stored again.

Images