CN116877220A - Liquid-pumping energy-storage power generation system and energy-storage power generation method - Google Patents
Liquid-pumping energy-storage power generation system and energy-storage power generation method Download PDFInfo
- Publication number
- CN116877220A CN116877220A CN202311129426.2A CN202311129426A CN116877220A CN 116877220 A CN116877220 A CN 116877220A CN 202311129426 A CN202311129426 A CN 202311129426A CN 116877220 A CN116877220 A CN 116877220A
- Authority
- CN
- China
- Prior art keywords
- energy storage
- power generation
- liquid
- air
- compressed air
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004146 energy storage Methods 0.000 title claims abstract description 344
- 238000010248 power generation Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 31
- 238000005086 pumping Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 161
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000011550 stock solution Substances 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims description 11
- 230000005484 gravity Effects 0.000 claims description 9
- 230000001276 controlling effect Effects 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 6
- 238000005381 potential energy Methods 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 9
- 230000005611 electricity Effects 0.000 description 7
- 239000012530 fluid Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03B—MACHINES OR ENGINES FOR LIQUIDS
- F03B13/00—Adaptations of machines or engines for special use; Combinations of machines or engines with driving or driven apparatus; Power stations or aggregates
- F03B13/06—Stations or aggregates of water-storage type, e.g. comprising a turbine and a pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
Abstract
The application provides an energy storage power generation system and an energy storage power generation method for liquid pumping and energy storage, wherein the energy storage power generation system comprises air compression equipment, air expansion power generation equipment, a second drainage pipeline, a first liquid storage container and a plurality of compressed air energy storage devices, and the compressed air energy storage devices comprise: the device comprises a gas storage container, a second liquid storage container, a second drainage pipeline, an air inlet pipeline, an air outlet pipeline, a locking mechanism, a pressure detection module and a control module; between a plurality of compressed air energy storage devices, through first drainage pipeline intercommunication between regulation district and the first stock solution container, through second drainage pipeline intercommunication between the second stock solution container. The application realizes the sharing of filling liquid between the compressed air energy storage devices, reduces the consumption of the filling liquid in the energy storage power generation system, generates power by utilizing gravitational potential energy difference, ensures the power generation quality and the power generation efficiency, and reduces the use cost of the compressed air energy storage devices and the energy storage power generation system.
Description
Technical Field
The application relates to the technical field of air energy storage, in particular to an energy storage power generation system and an energy storage power generation method for liquid pumping and energy storage.
Background
The constant-pressure air compression energy storage container is one of the common energy storage containers in the prior art, the pressure of compressed gas can be kept unchanged in the process of deflation, and the power generation quality is guaranteed, but the applicant discovers that in the process of realizing the application, the constant-pressure air compression air storage container can realize constant-pressure energy release only by introducing liquid into the air storage container in the process of power generation, and the larger the number of the air storage containers in the energy storage power generation system is, the larger the required liquid amount is, so that the use cost of the energy storage power generation system is correspondingly increased.
Disclosure of Invention
The application aims to provide an energy storage power generation system and an energy storage power generation method for liquid pumping and energy storage, which are used for solving the technical problems in the prior art and mainly comprise the following two aspects:
the first aspect of the application provides an energy storage power generation system for liquid pumping and energy storage, which comprises air compression equipment, air expansion power generation equipment, a first drainage pipeline, a first liquid storage container and a plurality of compressed air energy storage devices,
the compressed air energy storage device includes: the device comprises an air storage container, a second liquid storage container, a second drainage pipeline, an air inlet pipeline, an air outlet pipeline, a locking mechanism, a pressure detection module and a control module, wherein an energy storage cavity is arranged in the air storage container, a first piston piece, a second piston piece and a partition surface are sequentially arranged in the energy storage cavity along the longitudinal direction, an energy storage area is arranged between the first piston piece and the second piston piece, and an adjusting area is arranged between the second piston piece and the partition surface; the second liquid storage container is arranged on the first piston member, the sliding stroke of the first piston member in the energy storage cavity comprises a first position and a second position, the second liquid storage container is communicated with the input end of the second drainage pipeline in the first position, the second liquid storage container is communicated with the output end of the second drainage pipeline of the other compressed air energy storage device in the second position, and the height of the second liquid storage container in the first position is higher than that in the second position; a generator is arranged on the second drainage tube;
the first drainage pipeline is communicated with the adjusting area, and a drainage pump is arranged on the first drainage pipeline;
the input end of the air inlet pipeline is communicated with the air compression equipment, the output end of the air inlet pipeline is communicated with the energy storage area in the air storage stage, and the air inlet pipeline is provided with an air inlet valve;
the output end of the air outlet pipeline is communicated with the air expansion power generation equipment, the input end of the air outlet pipeline is communicated with the energy storage area in the exhaust stage, the air outlet pipeline is longitudinally positioned above the air inlet pipeline, and the air outlet pipeline is provided with an air outlet valve;
the locking mechanism is used for locking the position of the first piston piece in the energy storage cavity;
the pressure detection module is used for detecting the gravity of the second liquid storage container;
the control module is configured to: controlling the working states of the air inlet valve, the air outlet valve, the drainage pump and the locking mechanism based on the gravity signal detected by the pressure detection module;
between a plurality of compressed air energy storage devices, through first drainage pipeline intercommunication between regulation district and the first stock solution container, through second drainage pipeline intercommunication between the second stock solution container.
Further, the control module is further configured to: after the air outlet pipeline is communicated with the energy storage area, the locking mechanism is controlled to lock the position of the first piston piece in the energy storage cavity.
Further, the control module is further configured to: after the locking mechanism locks the position of the first piston part, the liquid in the second liquid storage container is discharged into the second drainage pipeline, so that the generator on the second drainage pipeline is driven to generate power.
Further, the first piston member is a counterweight body or the counterweight body is arranged on the first piston member.
Further, the locking mechanism is used for locking the position of the second piston element in the energy storage cavity, and the second piston element is in a locking state in the energy storage stage.
Further, the compressed air energy storage device comprises a first liquid storage container and the compressed air energy storage device, the adjusting area is communicated with the first liquid storage container through a first drainage pipeline, and the second liquid storage container is communicated with the second liquid storage container through a second drainage pipeline.
Further, the energy storage power generation system comprises at least two energy storage working groups, each energy storage working group comprises at least two compressed air energy storage devices, and in one energy storage working group, the compressed air energy storage devices share a generator.
Further, the energy storage power generation system further comprises an air inlet main pipe and an air outlet main pipe, wherein the air inlet pipeline is respectively communicated with the output end of the air inlet main pipe, the input end of the air inlet main pipe is used for being communicated with the air compression equipment, the air outlet pipeline is respectively communicated with the input end of the air outlet main pipe, and the output end of the air outlet main pipe is used for being communicated with the air expansion power generation equipment.
Further, in one energy storage working group, the air storage container is disposed around the generator.
The second aspect of the application provides an energy storage power generation method, which is based on the compressed air energy storage device or the energy storage power generation system and comprises constant-pressure energy storage,
the constant-voltage energy storage comprises the following steps: controlling the air inlet pipeline to be communicated with the energy storage area, locking the position of the second piston part, and introducing liquid into the second liquid storage container so as to enable the pressure of the first piston part on the energy storage area to reach a first preset pressure value; when the first piston member is in an unlocking state, compressed air is introduced into the energy storage area through the air inlet pipeline; after the air outlet pipeline is communicated with the energy storage area, locking the position of the first piston piece in the energy storage cavity to finish energy storage; introducing the liquid in a second liquid storage container in the compressed air energy storage device subjected to energy storage into the second liquid storage container of the compressed air energy storage device to be subjected to energy storage through a second drainage pipeline;
further, the energy storage power generation method also comprises constant-pressure energy release,
the constant-pressure energy release comprises the following steps: locking the position of the first piston member, unlocking the second piston member, introducing liquid into the regulating area so that the pressure of the second piston member to the energy storage area reaches a second preset pressure value, opening the air outlet valve, and controlling the flow of the liquid introduced into the regulating area based on the gas flow and/or the air pressure value of the energy storage area so as to keep the constant pressure of the energy storage area to discharge compressed air; after the compressed air in the energy storage area is released, the first piston piece is unlocked, and liquid in the adjusting area in the compressed air energy storage device after the energy release is completed is guided out and stored or is used in the compressed air energy storage device in constant pressure energy release.
Compared with the prior art, the application has at least the following technical effects:
the application realizes the sharing of the filling liquid between the compressed air energy storage devices, effectively reduces the consumption of the filling liquid in the energy storage power generation system, utilizes the gravitational potential energy difference to generate power, simultaneously, in the whole constant-pressure energy storage process, the filling liquid is not contacted with the compressed air, is not directly contacted with the inner wall of the energy storage cavity, thereby effectively avoiding the situations that the air storage tank is corroded by the filling liquid, the gas and the liquid are mixed mutually, ensuring the power generation quality and the power generation efficiency, and reducing the use cost of the compressed air energy storage device and the energy storage power generation system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following description will briefly explain the embodiments of the present application or the drawings used in the description of the prior art, and it is obvious that the drawings described below are only some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the piping connection of an energy storage power generation system (not storing energy) of the present application;
FIG. 2 is a schematic diagram of the piping connection of the energy storage power generation system of the present application (the first compressed air energy storage device performs constant pressure energy storage);
FIG. 3 is a schematic diagram of the piping connection of the energy storage power generation system of the present application (the second compressed air energy storage device is ready for constant pressure energy storage);
FIG. 4 is a schematic diagram of the piping connection of the energy storage power generation system of the present application (the second compressed air energy storage device performs constant pressure energy storage);
FIG. 5 is a schematic diagram of the piping connection of the energy storage power generation system of the present application (the first compressed air energy storage device performs constant pressure energy release);
FIG. 6 is a schematic diagram of the piping connection of the energy storage power generation system of the present application (the second compressed air energy storage device is ready for constant pressure energy release);
FIG. 7 is a schematic diagram of the piping connection of the energy storage power generation system of the present application (the second compressed air energy storage device performs constant pressure energy release);
FIG. 8 is a schematic diagram of the piping connection of the energy storage power generation system of the present application (liquid circulation in the second reservoir between two compressed air energy storage devices for power generation);
FIG. 9 is a schematic diagram of the piping connections of the energy storage power generation system of the present application sharing a generator;
in the drawing the view of the figure,
10. a gas storage container; 101. a first piston member; 102. a second piston member; 103. an energy storage area; 104. a conditioning zone; 105. a second reservoir; 106. a second drainage line; 107. a generator; 108. an air intake line; 1081. an intake valve; 109. an air outlet pipeline; 1091. an air outlet valve; 110. a locking mechanism; 111. a first drainage line; 112. a drainage pump; 113. a first reservoir; 20. an air inlet main pipe; 30. a main air outlet pipe; 40. an air compression device; 50. an air expansion power plant.
Detailed Description
The following description provides many different embodiments, or examples, for implementing different features of the application. The elements and arrangements described in the following specific examples are presented for purposes of brevity and are provided only as examples and are not intended to limit the application.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, based on the embodiments of the application, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the application. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, based on the embodiments of the application, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the application.
Example 1:
the constant-pressure air compression energy storage container is one of the common energy storage containers in the prior art, the pressure of compressed gas can be kept unchanged in the process of deflation, and the power generation quality is guaranteed, but the constant-pressure air compression air storage tank can realize constant-pressure energy release only by introducing liquid into the air storage tank in the power generation process, the more the number of the air storage tanks in the energy storage power generation system is, the larger the amount of the required liquid is, so that the use cost of the energy storage power generation system is correspondingly increased; in addition, as the service time increases, the contact time of the filling liquid and the air storage tank increases, the air storage tank can be corroded by the filling liquid, the service life of the air storage tank is influenced, in the constant pressure energy release process, compressed air is directly contacted with the filling liquid in a high pressure state, and the situation that gas phase and liquid phase are mixed with each other possibly occurs, so that the power generation efficiency and the power generation quality are influenced; in order to reduce the usage amount of filling liquid in the energy storage power generation system and reduce the use cost of the energy storage power generation system, the embodiment of the application provides an energy storage power generation system for pumping liquid and storing energy, as shown in fig. 1, which comprises an air compression device 40, an air expansion power generation device 50, a first drainage pipeline 111, a first liquid storage container 113 and a plurality of compressed air energy storage devices,
the compressed air energy storage device includes: the gas storage device comprises a gas storage container 10, a second liquid storage container 105, a second drainage pipeline 106, a gas inlet pipeline 108, a gas outlet pipeline 109, a locking mechanism 110, a pressure detection module and a control module, wherein an energy storage cavity is arranged in the gas storage container 10, a first piston member 101, a second piston member 102 and a partition surface are sequentially arranged in the energy storage cavity along the longitudinal direction, an energy storage area 103 is arranged between the first piston member 101 and the second piston member 102, and an adjustment area 104 is arranged between the second piston member 102 and the partition surface; the second drainage pipeline 106 is arranged on the outer wall of the gas storage container 10, the second liquid storage container 105 is arranged on the first piston member 101, the sliding stroke of the first piston member 101 in the energy storage cavity comprises a first position and a second position, the second liquid storage container 105 is communicated with the input end of the second drainage pipeline 106 in the first position, the second liquid storage container 105 is communicated with the output end of the second drainage pipeline 106 of the other compressed air energy storage device in the second position, and the height of the second liquid storage container 105 in the first position is higher than that in the second position; a generator 107 is arranged on the second drainage pipeline 106;
the first drainage pipeline 111 is communicated with the adjusting area 104, and a drainage pump 112 is arranged on the first drainage pipeline 111;
the input end of the air inlet pipeline 108 is communicated with the air compression device 40, the output end of the air inlet pipeline 108 is communicated with the energy storage area 103 in the air storage stage, and the air inlet pipeline 108 is provided with an air inlet valve 1081;
the output end of the air outlet pipeline 109 is communicated with the air expansion power generation equipment 50, the input end of the air outlet pipeline 109 is communicated with the energy storage area 103 in the exhaust stage, the air outlet pipeline 109 is longitudinally positioned above the air inlet pipeline 108, and the air outlet pipeline 109 is provided with an air outlet valve 1091;
the locking mechanism 110 is used for locking the position of the first piston member 101 in the energy storage cavity;
the pressure detection module is used for detecting the gravity of the second liquid storage container 105;
the control module is configured to: based on the gravity signal detected by the pressure detection module, the working states of the air inlet valve 1081, the air outlet valve 1091, the drainage pump 112 and the locking mechanism 110 are controlled;
between the compressed air energy storage devices, the regulating area 104 is communicated with the first liquid storage container 113 through a first drainage pipeline 111, and the second liquid storage container 105 is communicated with the first liquid storage container through a second drainage pipeline 106.
For a single compressed air energy storage device, when energy storage is needed, the position of the second piston member 102 is controlled to be locked below the air inlet pipeline 108, compressed air is generated by the air compression equipment 40, the air inlet pipeline 108 is communicated with the energy storage area 103, liquid is introduced into the second liquid storage container 105, as shown in fig. 1, the mass on the first piston member 101 is increased, so that the pressure of the first piston member 101 on the energy storage area 103 reaches a first preset pressure value, and the pre-stored energy pressure value in the energy storage area 103 is regulated and controlled by the cooperation of the second liquid storage container 105 and the first piston member 101; then, under the condition that the first piston member 101 is in an unlocking state, compressed air is introduced into the energy storage area 103 through the air inlet pipeline 108, and the compressed air is matched with the air in the first piston member 101 to perform constant-pressure energy storage, namely, as the compressed air amount in the energy storage area 103 increases, the first piston member 101 is pushed to move upwards along the longitudinal direction, after the first piston member 101 moves upwards to the air outlet pipeline 109 to be communicated with the energy storage area 103, as shown in fig. 2, the first piston member 101 is locked at the position in the energy storage cavity, meanwhile, the air inlet valve 1081 is closed, constant-pressure energy storage is completed, at this time, the air pressure value in the energy storage area 103 is a first preset air pressure value, then, the liquid in the second liquid storage container 105 (high position) in the compressed air energy storage device after the energy storage is completed is introduced into the second liquid storage container 105 (low position) of the compressed air energy storage device to be stored through the second drainage pipeline 106, as shown in fig. 3, the sharing of the filled liquid can be realized between the compressed air energy storage devices, the consumption of the filled liquid in the energy storage system is reduced, the gravity difference of the filled liquid can be utilized, the generator is driven, and the energy utilization efficiency is improved; meanwhile, in the whole constant-pressure energy storage process, the filling liquid in the second liquid storage container 105 is not in contact with compressed air, and is not in direct contact with the inner wall of the energy storage cavity, so that the situations that the gas storage tank is corroded by the filling liquid, gas and liquid are mixed are effectively avoided, the power generation quality and the power generation efficiency are ensured, and the use cost of the compressed air energy storage device and the energy storage power generation system is reduced.
In addition, when the compressed air in the compressed air energy storage device needs to be released to generate electricity, the position of the first piston member 101 may be locked, the second piston member 102 may be unlocked, the second piston member 102 is in a following state, liquid is introduced into the adjustment region 104, the second piston member 102 is pushed to move towards the direction close to the first piston member 101, so that the pressure of the second piston member 102 on the energy storage region 103 reaches a second preset pressure value, that is, the air pressure value required by the air expansion power generation device 50, the air outlet valve 1091 is opened, the compressed air is introduced into the air expansion power generation device 50 to generate electricity, and based on the air flow and/or the air pressure value of the energy storage region 103, the liquid flow introduced into the adjustment region 104 is controlled, so that the discharged air flow and the liquid flow entering the adjustment region 104 are relatively balanced, so that the energy storage region 103 can keep constant pressure to discharge the compressed air, thereby realizing constant pressure energy release, as shown in fig. 4 and 5, fig. 4 shows the state before the compressed air energy storage device performs constant pressure energy release; after the compressed air in the energy storage area is released, the first piston member 101 is unlocked, the liquid in the adjusting area 104 in the compressed air energy storage device for releasing energy is guided out and stored by the gravity boosting of the first piston member 101 and the second liquid storage container 105, as shown in fig. 6, or the liquid in the adjusting area 104 in the compressed air energy storage device for releasing energy is introduced into the compressed air energy storage device for releasing energy under constant pressure, as shown in fig. 7, so that the consumption of the filling liquid in the energy storage power generation system is reduced, the driving energy consumption in the flowing process of the filling liquid is reduced, the power generation quality and the power generation efficiency are ensured, and the use cost of the compressed air energy storage device and the energy storage power generation system is reduced.
It should be noted that, the locking mechanism 110 is in the prior art, and may be used to lock the position of the first piston member 101 through frictional resistance with the first piston member 101 or the inner wall of the energy storage cavity, or may be used to lock the position of the first piston member 101 through joggle between the locking mechanism 110 and the first piston member 101 or the inner wall of the energy storage cavity, and may specifically be a cycloidal self-locking device, a spiral self-locking device, an inertial self-locking device or an electromagnetic self-locking device; the pressure detection module is in the prior art, and may be specifically a pressure sensor, which is not specifically limited herein.
In order to ensure that the compressed air energy storage device can realize constant-pressure energy release after energy storage is completed, the control module can be configured to: after the air outlet pipeline 109 is communicated with the energy storage area 103, the locking mechanism 110 is controlled to lock the position of the first piston member 101 in the energy storage cavity.
To reduce the amount of fill fluid in the energy storage power generation system, the control module may be configured to: after the locking mechanism 110 locks the position of the first piston member 101, the liquid in the second liquid storage container 105 is discharged, so that the liquid in the second liquid storage container 105 in the compressed air energy storage device which completes energy storage is led into the second liquid storage container 105 of the compressed air energy storage device to be stored through the second drainage pipeline 106, and then the compressed air energy storage devices are shared by filling liquid, so that the consumption of the filling liquid in the energy storage power generation system is effectively reduced, and the generator is driven by gravity potential energy difference to generate power in the process of flowing through the second drainage pipeline 106.
In order to further reduce the amount of the filling liquid, the first piston member 101 may be configured as a counterweight body, so as to increase the initial pressure of the first piston member 101 on the energy storage area 103, thereby reducing the amount of the filling liquid for the first piston member 101 to reach a preset pressure value on the energy storage area 103, reducing the volume of the device, and improving the utilization rate of the structural space of the device.
In some embodiments, to further reduce the amount of filling liquid, a weight may be added to the first piston member 101 to increase the initial pressure of the first piston member 101 against the energy storage region 103.
In some embodiments, after one energy storage cavity finishes constant pressure energy release in the constant pressure energy release process, the liquid in the adjusting area 104 in the compressed air energy storage device which finishes constant pressure energy release can be first introduced into the first liquid storage container 113 for storage, and when the other compressed air energy storage device takes over constant pressure energy release, the liquid in the first liquid storage container 113 is controlled to be introduced into the adjusting area 104 of the compressed air energy storage device which is to perform constant pressure energy release, so as to ensure stable operation of the device.
In order to ensure stable constant-pressure energy storage, in the energy storage stage, the control air inlet pipeline 108 is always communicated with the energy storage area 103, so that compressed air can be continuously stored in the energy storage area 103.
In order to realize the communication between the air inlet pipeline 108 and the energy storage area 103 in the energy storage stage, the locking mechanism 110 may be further configured to lock the position of the second piston member 102 in the energy storage cavity, and in the energy storage stage, the second piston member 102 is in a locked state, so that the air inlet pipeline 108 and the energy storage area 103 are ensured to be stably communicated, and the longitudinal sliding stroke of the first piston member 101 can be stably controlled to be positively correlated with the air inflow of compressed air, thereby realizing stable constant-pressure energy storage.
In some embodiments, when the energy storage power generation system performs constant-pressure energy storage, a part of the compressed air energy storage devices can be selected to perform constant-pressure energy storage, and the other part of the compressed air energy storage devices are replaced with the other part of the compressed air energy storage devices to perform constant-pressure energy storage, and in the process of replacing the constant-pressure energy storage between the compressed air energy storage devices, the liquid in the second liquid storage container 105 in the compressed air energy storage device for performing constant-pressure energy storage is guided into the second liquid storage container 105 in the compressed air energy storage device for performing constant-pressure energy storage, so that the consumption of filling liquid in the energy storage power generation system can be reduced, and the gravitational potential energy difference is utilized to generate power; similarly, in the constant pressure energy release process, a part of compressed air energy storage devices can be selected to perform constant pressure energy release, another part of compressed air energy storage devices can be used for replacing the constant pressure energy release process, and in the constant pressure energy release process, liquid in the adjusting region 104 in the compressed air energy storage device for performing constant pressure energy release is introduced into the adjusting region 104 in the compressed air energy storage device for performing constant pressure energy release, or liquid in the adjusting region 104 in the compressed air energy storage device for performing constant pressure energy release is introduced into the first liquid storage container 113, and the first liquid storage container 113 is introduced into the adjusting region 104 in the compressed air energy storage device for performing constant pressure energy release, so that the amount of filling liquid in the energy storage power generation system is further reduced.
For an energy storage power generation system comprising two compressed air energy storage devices, the initial state is shown in fig. 1, the two compressed air energy storage devices are in the state of no energy storage, and the second liquid storage container 105 of the first compressed air energy storage device stores liquid;
then introducing compressed air into the first compressed air energy storage device to store energy at constant pressure, as shown in fig. 2;
after the constant-pressure energy storage of the first compressed air energy storage device is completed, the liquid in the second liquid storage container 105 in the first compressed air energy storage device is led into the second liquid storage container 105 of the second compressed air energy storage device through a second drainage pipeline 106, and as shown in fig. 3, a generator 107 is driven to generate electricity in the leading-in process;
then introducing compressed air into the second compressed air energy storage device to perform constant-pressure energy storage, as shown in fig. 4;
after the constant-pressure energy storage of the second compressed air energy storage device is completed, the liquid in the first liquid storage container 113 can be introduced into the adjusting area 104 of the first compressed air energy storage device, so that the first compressed air energy storage device discharges the compressed air at constant pressure to generate electricity, as shown in fig. 5;
after the constant pressure energy release of the first compressed air energy storage device is completed, introducing the liquid in the adjusting area 104 in the first compressed air energy storage device into the adjusting area 104 in the second compressed air energy storage device, and enabling the second compressed air energy storage device to perform constant pressure energy release, as shown in fig. 7; or the liquid in the adjusting area 104 in the first compressed air energy storage device is led into the first liquid storage container 113 as shown in fig. 6, and then the first liquid storage container 113 is led into the adjusting area 104 in the second compressed air energy storage device, so that the second compressed air energy storage device can release energy under constant pressure as shown in fig. 7; at this time, the liquid in the second liquid storage container 105 of the second compressed air energy storage device can be introduced into the second liquid storage container 105 of the first compressed air energy storage device, and the generator 107 is driven to generate electricity in the introduction process, as shown in fig. 8;
after the constant pressure energy release of the second compressed air energy storage device is completed, introducing the liquid in the regulating area 104 of the second compressed air energy storage device into the first liquid storage container 113; the liquid in the second liquid storage container 105 of the second compressed air energy storage device can be introduced into the second liquid storage container 105 of the first compressed air energy storage device, and the generator 107 is driven to generate electricity in the introduction process;
after the liquid in the adjusting area 104 of the second compressed air energy storage device is completely led into the first liquid storage container 113, the energy storage power generation system is turned into an initial state, as shown in fig. 1, and a constant-pressure energy storage and constant-pressure energy release cycle is realized.
In the use process, when one energy storage cavity is used up and needs to be switched to the other energy storage cavity to continue working, in order to realize continuous stable working of the energy storage power generation system, the energy storage power generation system can comprise at least two energy storage working groups, each energy storage working group comprises at least two compressed air energy storage devices, a generator 107 and a drainage pump 112 are shared between the compressed air energy storage devices, when the constant-pressure energy storage or the constant-pressure energy release is carried out, the energy storage cavity in one energy storage working group is naturally switched to the energy storage cavity in the other energy storage working group after the constant-pressure energy storage or the constant-pressure energy release is carried out, so that sufficient time is available for adjusting the used energy storage cavity, the adjustment work comprises fluid flow power generation between the second liquid storage containers 105, fluid flow rotation between the adjusting areas 104 is regulated, and locking or resetting of the first piston element 101 and the second piston element 102 is carried out; in addition, in some embodiments, in one energy storage working group, one generator 107 is shared between the compressed air energy storage devices, or one drainage pump 112 is shared between the compressed air energy storage devices, fluid circulation power generation between the plurality of second liquid storage containers 105 is realized by using one generator 107 and matching with the second drainage pipeline 106, fluid circulation transfer between the plurality of adjustment areas 104 is realized by using one drainage pump 112 and matching with the first drainage pipeline 111, so that the usage amount of the pump and the generator in the energy storage power generation system can be effectively reduced, the utilization rate of a single pump and a single generator 107 is improved, and the construction and use cost of the energy storage power generation system is reduced.
In order to realize continuous and stable switching control between different energy storage working groups in constant-voltage energy storage or constant-voltage energy release, the energy storage power generation system can be further provided with an air inlet main pipe 20 and an air outlet main pipe 30, wherein the air inlet pipeline 108 is respectively communicated with the output end of the air inlet main pipe 20, the input end of the air inlet main pipe 20 is used for being communicated with the air compression equipment 40, the air outlet pipeline 109 is respectively communicated with the input end of the air outlet main pipe 30, the output end of the air outlet main pipe 30 is used for being communicated with the air expansion power generation equipment 50, the air inlet main pipe 20 is communicated with different air inlet pipelines 108 through switching control, stable switching of constant-voltage energy storage between different energy storage working groups is realized, and the air outlet main pipe 30 is communicated with different air outlet pipelines 109 through switching control, so that stable switching of constant-voltage energy release between different energy storage working groups is realized.
In some embodiments, to reduce the volume of the energy storage power generation system and increase the space utilization, as shown in fig. 9, the gas storage container 10 may be disposed in the same energy storage working group, and the generator 107 and/or the drainage pump 112 may be surrounded by the gas storage container 10, so that the pipeline lengths of the second drainage pipeline 106 and the first drainage pipeline 111 may be further reduced.
In some embodiments, the second liquid storage container 105 may be configured to communicate with the first liquid storage container 113 through a liquid adding pump, so as to realize sharing of filling liquid between the second liquid storage container 105 and the adjustment area 104, and further reduce the filling liquid dosage in the energy storage power generation system.
Example 2:
the embodiment provides an energy storage power generation method, which is based on the energy storage power generation system in the embodiment 1, and comprises constant-voltage energy storage and constant-voltage energy release,
the constant-voltage energy storage comprises the following steps: the air inlet pipeline 108 is controlled to be communicated with the energy storage area 103, the position of the second piston member 102 is locked, and liquid is introduced into the second liquid storage container 105 so that the pressure of the first piston member 101 to the energy storage area 103 reaches a first preset pressure value; when the first piston member 101 is in the unlocking state, compressed air is introduced into the energy storage area 103 through the air inlet pipeline 108; after the air outlet pipeline 109 is communicated with the energy storage area 103, the position of the first piston member 101 in the energy storage cavity is locked, so that energy storage is completed; the liquid in the second liquid storage container 105 in the compressed air energy storage device subjected to energy storage is led into the second liquid storage container 105 of the compressed air energy storage device to be subjected to energy storage through a second drainage pipeline 106, and the generator 107 is driven to generate electricity by utilizing gravitational potential energy difference when the liquid flows through the second drainage pipeline 106;
the constant-pressure energy release comprises the following steps: locking the position of the first piston member 101, unlocking the second piston member 102, introducing liquid into the regulating area 104 to enable the pressure of the second piston member 102 to the energy storage area 103 to reach a second preset pressure value, opening the air outlet valve 1091, and controlling the flow of the liquid introduced into the regulating area 104 based on the gas flow and/or the air pressure value of the energy storage area 103 to enable the energy storage area 103 to keep constant pressure to discharge compressed air; after the compressed air in the energy storage area 103 is released, the first piston member 101 is unlocked, and the liquid in the adjusting area 104 in the compressed air energy storage device for energy release is led out and stored or used in the compressed air energy storage device for energy release under constant pressure.
Constant-pressure energy storage is carried out by taking over among a plurality of compressed air energy storage devices, orderly circulation and power generation of filling liquid among the second liquid storage containers 105 are controlled in the taking over process, multiplexing of the filling liquid among different compressed air energy storage devices is realized, the consumption of the filling liquid in an energy storage power generation system is reduced, and the resource utilization rate is improved; meanwhile, constant-pressure energy release is carried out by taking over among the compressed air energy storage devices, orderly transfer of filling liquid between the regulating areas 104 is controlled in the take over process, multiplexing of the filling liquid among different compressed air energy storage devices is achieved, the consumption of the filling liquid in the energy storage power generation system is further reduced, the power generation quality and the power generation efficiency are guaranteed, and the use cost of the compressed air energy storage devices and the energy storage power generation system is reduced.
The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the application.
Claims (10)
1. The energy storage power generation system for liquid pumping and energy storage is characterized by comprising air compression equipment, air expansion power generation equipment, a second drainage pipeline, a first liquid storage container and a plurality of compressed air energy storage devices,
the compressed air energy storage device includes: the device comprises an air storage container, a second liquid storage container, a second drainage pipeline, an air inlet pipeline, an air outlet pipeline, a locking mechanism, a pressure detection module and a control module, wherein an energy storage cavity is arranged in the air storage container, a first piston piece, a second piston piece and a partition surface are sequentially arranged in the energy storage cavity along the longitudinal direction, an energy storage area is arranged between the first piston piece and the second piston piece, and an adjusting area is arranged between the second piston piece and the partition surface; the second liquid storage container is arranged on the first piston member, the sliding stroke of the first piston member in the energy storage cavity comprises a first position and a second position, the second liquid storage container is communicated with the input end of the second drainage pipeline in the first position, the second liquid storage container is communicated with the output end of the second drainage pipeline of the other compressed air energy storage device in the second position, and the height of the second liquid storage container in the first position is higher than that in the second position; a generator is arranged on the second drainage tube;
the first drainage pipeline is communicated with the adjusting area, and a drainage pump is arranged on the first drainage pipeline;
the input end of the air inlet pipeline is communicated with the air compression equipment, the output end of the air inlet pipeline is communicated with the energy storage area in the air storage stage, and the air inlet pipeline is provided with an air inlet valve;
the output end of the air outlet pipeline is communicated with the air expansion power generation equipment, the input end of the air outlet pipeline is communicated with the energy storage area in the exhaust stage, the air outlet pipeline is longitudinally positioned above the air inlet pipeline, and the air outlet pipeline is provided with an air outlet valve;
the locking mechanism is used for locking the position of the first piston piece in the energy storage cavity;
the pressure detection module is used for detecting the gravity of the second liquid storage container;
the control module is configured to: controlling the working states of the air inlet valve, the air outlet valve, the drainage pump and the locking mechanism based on the gravity signal detected by the pressure detection module;
between a plurality of compressed air energy storage devices, through first drainage pipeline intercommunication between regulation district and the first stock solution container, through second drainage pipeline intercommunication between the second stock solution container.
2. The energy storage power generation system of claim 1, wherein the control module is further configured to: after the air outlet pipeline is communicated with the energy storage area, the locking mechanism is controlled to lock the position of the first piston piece in the energy storage cavity.
3. The energy storage power generation system of claim 2, wherein the control module is further configured to: after the locking mechanism locks the position of the first piston part, the liquid in the second liquid storage container is discharged into the second drainage pipeline, so that the generator on the second drainage pipeline is driven to generate power.
4. The energy storage and power generation system according to any one of claims 1 to 3, wherein the first piston member is a counterweight or the counterweight is disposed on the first piston member.
5. The energy storage power generation system of claim 4, wherein the locking mechanism is configured to lock the position of the second piston member within the energy storage chamber, the second piston member being in a locked state during the energy storage phase.
6. The energy storage power generation system of claim 5, wherein the energy storage power generation system comprises at least two energy storage working groups, each energy storage working group comprising at least two compressed air energy storage devices, and wherein within one energy storage working group, one generator is shared between the compressed air energy storage devices.
7. The energy storage power generation system of claim 6, further comprising an air inlet main pipe and an air outlet main pipe, wherein the air inlet pipeline is respectively communicated with the output end of the air inlet main pipe, the input end of the air inlet main pipe is used for being communicated with the air compression equipment, the air outlet pipeline is respectively communicated with the input end of the air outlet main pipe, and the output end of the air outlet main pipe is used for being communicated with the air expansion power generation equipment.
8. The energy storage power generation system of claim 6 wherein the gas storage containers are disposed around the generator within an energy storage working group.
9. An energy storage power generation method, which is characterized in that the energy storage power generation system based on any one of claims 1-8 comprises constant-voltage energy storage,
the constant-voltage energy storage comprises the following steps: controlling the air inlet pipeline to be communicated with the energy storage area, locking the position of the second piston part, and introducing liquid into the second liquid storage container so as to enable the pressure of the first piston part on the energy storage area to reach a first preset pressure value; when the first piston member is in an unlocking state, compressed air is introduced into the energy storage area through the air inlet pipeline; after the air outlet pipeline is communicated with the energy storage area, locking the position of the first piston piece in the energy storage cavity to finish energy storage; and leading the liquid in the second liquid storage container in the compressed air energy storage device subjected to energy storage into the second liquid storage container of the compressed air energy storage device subjected to energy storage through a second drainage pipeline.
10. The energy storage and power generation method according to claim 9, further comprising constant pressure energy release,
the constant-pressure energy release comprises the following steps: locking the position of the first piston member, unlocking the second piston member, introducing liquid into the regulating area so that the pressure of the second piston member to the energy storage area reaches a second preset pressure value, opening the air outlet valve, and controlling the flow of the liquid introduced into the regulating area based on the gas flow and/or the air pressure value of the energy storage area so as to keep the constant pressure of the energy storage area to discharge compressed air; after the compressed air in the energy storage area is released, the first piston piece is unlocked, and liquid in the adjusting area in the compressed air energy storage device after the energy release is completed is guided out and stored or is used in the compressed air energy storage device in constant pressure energy release.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311129426.2A CN116877220B (en) | 2023-09-04 | 2023-09-04 | Liquid-pumping energy-storage power generation system and energy-storage power generation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311129426.2A CN116877220B (en) | 2023-09-04 | 2023-09-04 | Liquid-pumping energy-storage power generation system and energy-storage power generation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116877220A true CN116877220A (en) | 2023-10-13 |
| CN116877220B CN116877220B (en) | 2023-11-07 |
Family
ID=88262441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311129426.2A Active CN116877220B (en) | 2023-09-04 | 2023-09-04 | Liquid-pumping energy-storage power generation system and energy-storage power generation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116877220B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4399368A (en) * | 1980-10-15 | 1983-08-16 | Bucknam Donald C | Power plant and process utilizing gravitational force |
| JP2008303769A (en) * | 2007-06-06 | 2008-12-18 | Kansai Electric Power Co Inc:The | Osmotic pressure type gas compression system |
| US20110283690A1 (en) * | 2008-04-09 | 2011-11-24 | Bollinger Benjamin R | Heat exchange with compressed gas in energy-storage systems |
| US20120000557A1 (en) * | 2008-04-09 | 2012-01-05 | Mcbride Troy O | Systems and methods for reducing dead volume in compressed-gas energy storage systems |
| CN102954050A (en) * | 2011-08-22 | 2013-03-06 | 中国科学院工程热物理研究所 | Hydraulic-pneumatic combined piston type energy storage system |
| WO2015109232A1 (en) * | 2014-01-16 | 2015-07-23 | Lightsail Energy, Inc. | Compressed gas energy storage system |
| EP3115605A1 (en) * | 2015-07-10 | 2017-01-11 | Eichner, Dominik | Device and method for generating compressed air |
| CN106321343A (en) * | 2016-07-28 | 2017-01-11 | 华北电力大学 | Isothermal compression air energy storage power generation system based on liquid temperature control and method thereof |
| CN108915932A (en) * | 2018-06-28 | 2018-11-30 | 华北电力大学 | A kind of classification relay compressed-air energy-storage system and its operation control strategy |
| WO2021143349A1 (en) * | 2020-01-14 | 2021-07-22 | 中国华能集团有限公司 | Gravity-compressed air energy storage system and working method therefor |
| CN114718686A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Low-pressure-difference sealed gravity compressed air energy storage system and method |
| CN116667399A (en) * | 2023-08-01 | 2023-08-29 | 九州绿能科技股份有限公司 | Series energy storage system, energy storage method and power generation method |
-
2023
- 2023-09-04 CN CN202311129426.2A patent/CN116877220B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4399368A (en) * | 1980-10-15 | 1983-08-16 | Bucknam Donald C | Power plant and process utilizing gravitational force |
| JP2008303769A (en) * | 2007-06-06 | 2008-12-18 | Kansai Electric Power Co Inc:The | Osmotic pressure type gas compression system |
| US20110283690A1 (en) * | 2008-04-09 | 2011-11-24 | Bollinger Benjamin R | Heat exchange with compressed gas in energy-storage systems |
| US20120000557A1 (en) * | 2008-04-09 | 2012-01-05 | Mcbride Troy O | Systems and methods for reducing dead volume in compressed-gas energy storage systems |
| CN102954050A (en) * | 2011-08-22 | 2013-03-06 | 中国科学院工程热物理研究所 | Hydraulic-pneumatic combined piston type energy storage system |
| WO2015109232A1 (en) * | 2014-01-16 | 2015-07-23 | Lightsail Energy, Inc. | Compressed gas energy storage system |
| EP3115605A1 (en) * | 2015-07-10 | 2017-01-11 | Eichner, Dominik | Device and method for generating compressed air |
| CN106321343A (en) * | 2016-07-28 | 2017-01-11 | 华北电力大学 | Isothermal compression air energy storage power generation system based on liquid temperature control and method thereof |
| CN108915932A (en) * | 2018-06-28 | 2018-11-30 | 华北电力大学 | A kind of classification relay compressed-air energy-storage system and its operation control strategy |
| WO2021143349A1 (en) * | 2020-01-14 | 2021-07-22 | 中国华能集团有限公司 | Gravity-compressed air energy storage system and working method therefor |
| CN114718686A (en) * | 2022-06-08 | 2022-07-08 | 西安热工研究院有限公司 | Low-pressure-difference sealed gravity compressed air energy storage system and method |
| CN116667399A (en) * | 2023-08-01 | 2023-08-29 | 九州绿能科技股份有限公司 | Series energy storage system, energy storage method and power generation method |
Non-Patent Citations (3)
| Title |
|---|
| 刘金超;徐玉杰;陈宗衍;张新敬;陈海生;谭春青;: "压缩空气储能储气装置发展现状与储能特性分析", 科学技术与工程, no. 35, pages 148 - 153 * |
| 李建明;王志勇;王淑琛;: "3AQ/3AT型断路器液压机构油泵频繁打压故障分析及处理方法", 高压电器, no. 05, pages 103 - 107 * |
| 杨茂华;: "蓄能技术的现状与展望", 能源与节能, no. 12, pages 165 - 167 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116877220B (en) | 2023-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4744285B2 (en) | Hydrogen vehicle gas use and supply system | |
| US20160238194A1 (en) | Storage device, gas storage unit and method for the at least partial filling or emptying of a gas storage unit | |
| DK2905432T3 (en) | Process and facilities for accumulating, storing and returning mechanical energy | |
| CN107003079B (en) | For the accumulation of energy facility of thermal energy caching, the power station with accumulation of energy facility and the method for running accumulation of energy facility | |
| WO2018120439A1 (en) | Gas-liquid dual-phase combined energy storage and power generation system, and energy storage and power generation method for same | |
| KR20110128297A (en) | A plant for storing and supplying compressed gas | |
| JP2007149630A (en) | Fuel cell system | |
| CN116877220B (en) | Liquid-pumping energy-storage power generation system and energy-storage power generation method | |
| CN101672524B (en) | Electric heating energy-storage recycling system | |
| CN106662411B (en) | Equipment for storing liquid | |
| HU222827B1 (en) | Enhanced heat transfer system | |
| CN101900137A (en) | Method for pumping by using siphon principle | |
| CN106969655B (en) | Isothermal compressed air energy storage system | |
| CN111637043B (en) | Fluid material storage and transportation system and method driven by power fluid diaphragm tank | |
| CN107354968A (en) | Direct drinking low energy consumption circulating technology | |
| KR20220140830A (en) | Compression device and filling station comprising such device | |
| CN102087059A (en) | Fluid circuit and refrigeration cycle apparatus using the same | |
| AU2020412877A1 (en) | Plant and process for storing and discharging thermal energy | |
| CN206695661U (en) | Isotherm compression air energy storage systems | |
| CN219775478U (en) | Hydrogen supply system and passive nuclear power system | |
| CN114458517B (en) | Energy storage system and control method thereof | |
| CN110131038A (en) | A kind of hydraulic pressure hydrogen energy power generation system | |
| RU125182U1 (en) | HYDROGEN GENERATOR | |
| KR100608087B1 (en) | Hydrogen gas producing device | |
| RU2811005C1 (en) | Chemical water treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |