CN220267792U - Crank connecting rod driving isothermal compressed air energy storage power generation system - Google Patents
Crank connecting rod driving isothermal compressed air energy storage power generation system Download PDFInfo
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- 238000004146 energy storage Methods 0.000 title claims abstract description 51
- 238000010248 power generation Methods 0.000 title claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 106
- 230000001360 synchronised effect Effects 0.000 claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 238000004891 communication Methods 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 2
- 238000007906 compression Methods 0.000 abstract description 13
- 230000006835 compression Effects 0.000 abstract description 10
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
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Abstract
The utility model provides a crank connecting rod driving isothermal compressed air energy storage power generation system, which comprises a compressed air energy storage device and a control system, wherein the control system is used for controlling the compressed air energy storage device to perform compression energy storage and expansion energy release; the compressed air energy storage device comprises a temperature control liquid piston unit, a grading isothermal compressed air subsystem and a constant pressure gas storage unit, wherein the temperature control liquid piston unit is used for carrying out liquid round trip transmission with the grading isothermal compressed air subsystem, and the grading isothermal compressed air subsystem is used for carrying out gas round trip transmission with the constant pressure gas storage unit; the temperature control liquid piston unit comprises a permanent magnet three-phase synchronous motor, a piston connecting rod, a crank connecting rod and a multi-stage hydraulic piston device, and the multi-stage hydraulic piston device is synchronously connected with the permanent magnet three-phase synchronous motor through the piston connecting rod and the crank connecting rod for transmission. The system improves the energy efficiency of the system, and further improves the power generation efficiency of the compressed air energy storage system.
Description
Technical Field
The utility model relates to the field of compressed air energy storage, in particular to a crank connecting rod driving isothermal compressed air energy storage power generation system.
Background
In various energy storage technologies, the compressed air energy storage equipment is composed of mechanical and electrical structures, the energy is converted between electric energy and air potential energy through the equipment working, the compressed air energy storage device has the characteristics of high efficiency, long service life, no waste pollution, no chemical medium consumption and the like, so that the compressed air energy storage device is one of pure green energy storage technologies with development potential.
The utility model patent application with the application publication number of CN104806313A specifically discloses an isothermal compressed air energy storage system and an isothermal compressed air energy storage method, wherein the air inlets of a compressor unit and an expansion unit are respectively provided with an ejector, in the energy storage compression process, a quasi-isothermal compression process is realized by spraying vaporous or foam liquid heat exchange medium into compressed air, so that the compression work of unit working medium is reduced, and a gas-liquid separator is arranged behind the compressor unit to separate and store cooling medium in the compressed air; in the energy release expansion process, a quasi-isothermal expansion process is realized by spraying vaporific or foam liquid heat exchange medium into the gas in the expansion process, so that the output work amount of unit working medium is improved, and the overall efficiency of the system is improved. But the screw air compressor and the expander adopted in the gas compression and expansion process of the system need to be driven by air, and the energy efficiency is low.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
In order to improve the power generation efficiency of the compressed air energy storage system, the utility model adopts the following technical scheme: the crank connecting rod driving isothermal compressed air energy storage power generation system comprises a compressed air energy storage device and a control system, wherein the control system is used for controlling the compressed air energy storage device to perform compression energy storage and expansion energy release;
the compressed air energy storage device comprises a temperature control liquid piston unit, a graded isothermal compressed air subsystem and a constant pressure gas storage unit, and is connected with the graded isothermal compressed air subsystem through a pipeline; the temperature control liquid piston unit is used for carrying out liquid reciprocating transmission with the graded isothermal compressed air subsystem, and the graded isothermal compressed air subsystem is used for carrying out gas reciprocating transmission with the constant pressure gas storage unit;
the hierarchical isothermal compressed air subsystem comprises multistage isothermal liquid piston devices, each stage of isothermal liquid piston device comprises two gas-liquid heat exchange tower tanks, the top and the bottom of each gas-liquid heat exchange tower tank are respectively connected with a temperature control liquid piston unit through three-way water valves, three-way air valves are respectively arranged at the top and the bottom of each gas-liquid heat exchange tower tank, the three-way air valve at the top of each stage of gas-liquid heat exchange tower tank is connected with the three-way air valve at the bottom of the next stage of gas-liquid heat exchange tower tank through a connecting pipeline, and the three-way air valve at the top of the last stage of gas-liquid heat exchange tower tank is connected with the constant-pressure air storage unit;
the temperature control liquid piston unit comprises a permanent magnet three-phase synchronous motor, a piston connecting rod, a crank connecting rod and a multi-stage hydraulic piston device, and the multi-stage hydraulic piston device is synchronously connected with the permanent magnet three-phase synchronous motor through the piston connecting rod and the crank connecting rod for transmission; each stage of hydraulic piston device comprises a hydraulic cylinder and piston blocks which divide the hydraulic cylinder into a left piston cavity and a right piston cavity, the top of each piston cavity is respectively communicated with the top of the gas-liquid heat exchange tower tank through an upper check valve group, and the bottom of each piston cavity is respectively communicated with the bottom of the gas-liquid heat exchange tower tank through a lower check valve group.
Based on the above, constant pressure gas storage unit includes constant pressure liquid tower jar and the constant pressure gas holder of passing through the pipeline intercommunication of taking a breath, the constant pressure gas holder is linked together through the three-way gas valve at first gas valve and last level gas-liquid heat exchange tower jar top.
Based on the above, the connecting pipeline is provided with a second intermittent air valve.
Based on the above, in order to be convenient for carry out the stroke spacing to the crank connecting rod, be provided with limit switch on the crank connecting rod.
Based on the above, the control system comprises a CPU module, a digital quantity input/output module, an analog quantity input module and a communication module, wherein the CPU module is respectively connected with the digital quantity input/output module, the analog quantity input module and the communication module.
Based on the above, the gas-liquid heat exchange tower tank, the constant pressure liquid tower tank and the constant pressure gas storage tank are provided with a temperature-pressure integrated sensor and a liquid level sensor, and the temperature-pressure integrated sensor and the liquid level sensor are respectively connected with the control system.
Compared with the prior art, the crank connecting rod driving isothermal compressed air energy storage power generation system provided by the utility model has the substantial characteristics and improvements, and particularly, when the energy is stored, the PLC controls the permanent magnet three-phase synchronous motor to be used as a motor to drive the crank connecting rod to reciprocate, heat generated by gas compression in the temperature control liquid piston unit is absorbed by liquid, so that adiabatic compression is changed into isothermal compression, gas is compressed to the constant pressure gas storage unit step by step, original liquid of the constant pressure gas storage unit is extruded to the constant pressure container tower tank by the gas, and the constant pressure state of the gas in the constant pressure gas storage unit is ensured all the time in the compression process.
When releasing energy, the liquid in the tower tank of the constant pressure container enters the constant pressure air storage tank to ensure constant pressure power generation in the energy releasing stage, the gas expands from the constant pressure air storage unit step by step, and the heat required by the gas expansion in the temperature control liquid piston unit is obtained from the liquid in compression, and the expansion drives the connecting rod to reciprocate.
Compared with the existing screw air compressor and expander, the system sends the energy storage and release working instructions to the PLC through the far end, the PLC controls the working state of the permanent magnet three-phase synchronous motor and the on-off state of the valve through the crank connecting rod by collecting the temperature, pressure, liquid level, piston position and other information of the system, isothermal compression and air expansion are achieved, the permanent magnet three-phase synchronous motor directly drives the crank connecting rod to move, pure mechanical transmission is achieved, and air transmission is not needed, so that the system cost is reduced, the system energy efficiency is improved, and the power generation efficiency of the compressed air energy storage system is improved.
Drawings
FIG. 1 is a schematic diagram of the structural connection relationship of a crank connecting rod driving isothermal compressed air energy storage power generation system.
Fig. 2 is a schematic diagram of a local structure of a crank-connecting rod driving isothermal compressed air energy storage power generation system provided by the utility model.
FIG. 3 is a schematic diagram of the operation logic of the crank-connecting rod driven isothermal compressed air energy storage power generation system provided by the utility model.
In the figure: 1. a left gas-liquid heat exchange tower tank; 2. feeding a three-way water valve; 3. a three-way air valve is arranged on the upper part; 4. right gas-liquid heat exchange tower tank; 5. a connecting pipe; 6. a constant pressure liquid column tank; 7. a permanent magnet three-phase synchronous motor; 8. constant pressure air storage tank; 9. a first intermittent air valve; 10. a gas line; 11. left upper single-way water valve; 12. a hydraulic cylinder; 13. a left lower single-way water valve; 14. a lower three-way water valve; 15. a lower three-way air valve; 16. a right lower single-way water valve; 17. the right upper single-way water valve; 18. a primary hydraulic piston cylinder unit; 19. a secondary hydraulic piston cylinder unit; 20. a three-stage hydraulic piston cylinder unit; 21. a second air valve; 22. a third air valve; 23. a piston connecting rod; 24. and a crank connecting rod.
Detailed Description
The technical scheme of the utility model is further described in detail through the following specific embodiments.
Example 1
The embodiment provides a crank connecting rod driving isothermal compressed air energy storage power generation system, which comprises a compressed air energy storage device and a control system, wherein the control system is used for controlling the compressed air energy storage device to perform compression energy storage and expansion energy release, as shown in fig. 1, 2 and 3.
Specifically, as shown in fig. 1, the compressed air energy storage device comprises a temperature control liquid piston unit, a graded isothermal compressed air subsystem and a constant pressure gas storage unit.
The compressed air energy storage device is connected with the graded isothermal compressed air subsystem through a pipeline. The temperature control liquid piston unit is used for carrying out liquid reciprocating transmission with the graded isothermal compressed air subsystem, and the graded isothermal compressed air subsystem is used for carrying out gas reciprocating transmission with the constant pressure gas storage unit.
Specifically, as shown in FIG. 2, the staged isothermal compressed air subsystem includes a three stage isothermal liquid piston device.
Each stage of isothermal liquid piston device comprises two gas-liquid heat exchange tower tanks, and the two gas-liquid heat exchange tower tanks can be divided into a left gas-liquid heat exchange tower tank 1 and a right gas-liquid heat exchange tower tank 4 according to positions.
The top and the bottom of each gas-liquid heat exchange tower tank are respectively connected with the temperature control liquid piston unit through a three-way water valve. The top and the bottom of each gas-liquid heat exchange tower tank are respectively provided with a three-way air valve. The three-way air valve at the top of each stage of gas-liquid heat exchange tower tank is connected with the three-way air valve at the bottom of the next stage of gas-liquid heat exchange tower tank through a connecting pipeline 5, and the three-way air valve at the top of the last stage of gas-liquid heat exchange tower tank is connected with the constant-pressure air storage unit through an air pipeline 10.
Wherein, according to the installation position, the three-way air valve can be divided into an upper three-way air valve 3 and a lower three-way air valve 15. The three-way water valve can be divided into an upper three-way water valve 2 and a lower three-way water valve 14.
The temperature control liquid piston unit comprises a permanent magnet three-phase synchronous motor 7, a piston connecting rod 23, a crank connecting rod 24 and a three-stage hydraulic piston device. The three-stage hydraulic piston device is synchronously connected with the permanent magnet three-phase synchronous motor 7 through the piston connecting rod 23 and the crank connecting rod 24 for transmission.
Each stage of the hydraulic piston device comprises a hydraulic cylinder 12 and a piston block dividing the hydraulic cylinder 12 into a left piston cavity and a right piston cavity. And the top of each piston cavity is communicated with the top of the gas-liquid heat exchange tower tank through an upper check valve group, and the bottom of each piston cavity is communicated with the bottom of the gas-liquid heat exchange tower tank through a lower check valve group.
Specifically, the three-stage hydraulic piston device may be divided into a primary hydraulic piston cylinder unit 18, a secondary hydraulic piston cylinder unit 19, and a three-stage hydraulic piston cylinder unit 20 according to the installation positions.
Specifically, according to the installation position, the upper check valve group may be divided into an upper left single pass water valve 11 and an upper right single pass water valve 17, and the lower check valve group may be divided into a lower left single pass water valve 13 and a lower right single pass water valve 16.
Specifically, the constant-pressure gas storage unit comprises a constant-pressure liquid tower tank 6 and a constant-pressure gas storage tank 8 which are communicated through a ventilation pipeline. The constant-pressure air storage tank 8 is communicated with a three-way air valve at the top of the last-stage gas-liquid heat exchange tower through a first air valve 9 and an air pipeline 10.
The connecting pipeline 5 is provided with a second air valve 21. Wherein, a second air valve 21 and a third air valve 22 are arranged on a connecting pipeline between the second-stage isothermal liquid piston device and the third-stage isothermal liquid piston device.
Specifically, in this embodiment, in order to facilitate the stroke limitation of the crank link 24, a limit switch is disposed on the crank link. The control system comprises a CPU module, a digital quantity input and output module, an analog quantity input module and a communication module, wherein the CPU module is respectively connected with the digital quantity input and output module, the analog quantity input module and the communication module.
Specifically, the energy storage stage of the permanent magnet three-phase synchronous motor is used as a motor, and the energy release stage is used as a generator; the crank connecting rod is a large gear mechanism, the energy storage stage converts rotary motion into reciprocating motion, and the energy release stage converts reciprocating motion into rotary motion.
Example 2
The embodiment provides a crank connecting rod driving isothermal compressed air energy storage power generation system, and the specific structure is different from embodiment 1 in that: in this embodiment, the gas-liquid heat exchange tower tank, the constant pressure liquid tower tank and the constant pressure gas storage tank are provided with a temperature-pressure integrated sensor and a liquid level sensor on the gas-liquid heat exchange tower tank, and the temperature-pressure integrated sensor and the liquid level sensor are respectively connected with the control system.
Specifically, the specific working flow of the crank connecting rod driving isothermal compressed air energy storage power generation system is as follows:
during energy storage, all three left gas-liquid heat exchange towers 1 in the gas-liquid heat exchange towers are respectively filled with gas, and all three right gas-liquid heat exchange towers 4 in the gas-liquid heat exchange towers are respectively filled with liquid.
Under the action of the permanent magnet three-phase synchronous motor and the crank connecting rod, the piston block is pushed to reciprocate, and meanwhile, the control system reads the state of the limit switch to judge the position of the piston block. Thereby changing the action of the one-way valve in the temperature-control liquid piston unit.
Specifically, when the piston block moves leftwards, the upper left single-pass water valve 11 and the lower right single-pass water valve 16 are opened, and the upper right single-pass water valve 17 and the lower left single-pass water valve 13 are closed.
When the piston block moves to the right, the upper left single-pass water valve 11 and the lower right single-pass water valve 16 are closed, and the upper right single-pass water valve 17 and the lower left single-pass water valve 13 are opened. The liquid in the three right gas-liquid heat exchange columns 4 is transferred to the three left gas-liquid heat exchange columns 1 via three hydraulic cylinders.
After the gas in the three left gas-liquid heat exchange towers 1 is compressed, the compressed gas is transferred to the constant-pressure gas storage tank 8 through the first gas valve 9, the second gas valve 21 and the third gas valve 22. Until all the liquid in the three right gas-liquid heat exchange columns 4 is transferred to the three left gas-liquid heat exchange columns 1.
And then the piston block continues to reciprocate under the action of the permanent magnet three-phase synchronous motor and the crank connecting rod. The states of the upper and lower three-way water valves and the upper and lower three-way air valves are changed, so that liquid is transferred from the liquid in the three right gas-liquid heat exchange tower tanks 4 to the three left gas-liquid heat exchange tower tanks 1, and the gas in the three right gas-liquid heat exchange tower tanks 4 is compressed and transferred to the constant-pressure gas storage tank.
Meanwhile, the PLC controls the volume of gas entering the constant-pressure gas storage tank to be consistent with the volume of liquid discharged from the constant-pressure gas storage tank to the constant-pressure liquid tower tank, so that the constant pressure of the constant-pressure gas storage tank is ensured.
And the process is repeated until the gas content and the pressure of the constant-pressure gas storage tank meet the requirements. The energy release process is the same as the energy storage principle, and the energy release process controls the gas expansion of the constant-pressure gas storage tank through the PLC, and the piston block moves to push the permanent magnet three-phase synchronous motor to generate power.
Finally, it should be noted that the above-mentioned embodiments are only for illustrating the technical scheme of the present utility model and are not limiting; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (6)
1. A crank connecting rod driving isothermal compressed air energy storage power generation system is characterized in that: the device comprises a compressed air energy storage device and a control system, wherein the control system is used for controlling the compressed air energy storage device to store energy in a compressed mode and release energy in an expanded mode;
the compressed air energy storage device comprises a temperature control liquid piston unit, a graded isothermal compressed air subsystem and a constant pressure gas storage unit, and is connected with the graded isothermal compressed air subsystem through a pipeline; the temperature control liquid piston unit is used for carrying out liquid reciprocating transmission with the graded isothermal compressed air subsystem, and the graded isothermal compressed air subsystem is used for carrying out gas reciprocating transmission with the constant pressure gas storage unit;
the hierarchical isothermal compressed air subsystem comprises multistage isothermal liquid piston devices, each stage of isothermal liquid piston device comprises two gas-liquid heat exchange tower tanks, the top and the bottom of each gas-liquid heat exchange tower tank are respectively connected with a temperature control liquid piston unit through three-way water valves, three-way air valves are respectively arranged at the top and the bottom of each gas-liquid heat exchange tower tank, the three-way air valve at the top of each stage of gas-liquid heat exchange tower tank is connected with the three-way air valve at the bottom of the next stage of gas-liquid heat exchange tower tank through a connecting pipeline, and the three-way air valve at the top of the last stage of gas-liquid heat exchange tower tank is connected with the constant-pressure air storage unit;
the temperature control liquid piston unit comprises a permanent magnet three-phase synchronous motor, a piston connecting rod, a crank connecting rod and a multi-stage hydraulic piston device, and the multi-stage hydraulic piston device is synchronously connected with the permanent magnet three-phase synchronous motor through the piston connecting rod and the crank connecting rod for transmission; each stage of hydraulic piston device comprises a hydraulic cylinder and piston blocks which divide the hydraulic cylinder into a left piston cavity and a right piston cavity, the top of each piston cavity is respectively communicated with the top of the gas-liquid heat exchange tower tank through an upper check valve group, and the bottom of each piston cavity is respectively communicated with the bottom of the gas-liquid heat exchange tower tank through a lower check valve group.
2. The crank-connecting rod driven isothermal compressed air energy storage power generation system according to claim 1, wherein: the constant-pressure gas storage unit comprises a constant-pressure liquid tower tank and a constant-pressure gas storage tank which are communicated through a ventilation pipeline, and the constant-pressure gas storage tank is communicated with a three-way gas valve at the top of the last-stage gas-liquid heat exchange tower tank through a first gas valve.
3. The crank-connecting rod driven isothermal compressed air energy storage power generation system according to claim 2, wherein: and a second intermittent air valve is arranged on the connecting pipeline.
4. A crank and connecting rod driven isothermal compressed air energy storage power generation system according to claim 3, wherein: and a limit switch is arranged on the crank connecting rod.
5. The crank-connecting rod driven isothermal compressed air energy storage power generation system according to any of claims 1 to 4, wherein: the control system comprises a CPU module, a digital quantity input and output module, an analog quantity input module and a communication module, wherein the CPU module is respectively connected with the digital quantity input and output module, the analog quantity input module and the communication module.
6. The crank-connecting rod driven isothermal compressed air energy storage power generation system according to claim 2, wherein: the gas-liquid heat exchange tower tank, the constant-pressure liquid tower tank and the constant-pressure gas storage tank are respectively provided with a temperature-pressure integrated sensor and a liquid level sensor, and the temperature-pressure integrated sensor and the liquid level sensor are respectively connected with the control system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321597793.0U CN220267792U (en) | 2023-06-21 | 2023-06-21 | Crank connecting rod driving isothermal compressed air energy storage power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321597793.0U CN220267792U (en) | 2023-06-21 | 2023-06-21 | Crank connecting rod driving isothermal compressed air energy storage power generation system |
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| CN220267792U true CN220267792U (en) | 2023-12-29 |
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| CN202321597793.0U Active CN220267792U (en) | 2023-06-21 | 2023-06-21 | Crank connecting rod driving isothermal compressed air energy storage power generation system |
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| CN (1) | CN220267792U (en) |
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2023
- 2023-06-21 CN CN202321597793.0U patent/CN220267792U/en active Active
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