Disclosure of Invention
The invention provides a gas turbine peak regulation power station combining liquid air energy storage, which is used for solving the defect that when a power grid is in a power utilization valley section, the existing gas turbine power station cannot play a role of filling valleys, and when the power grid is in the power utilization peak section, the power generation power of the existing gas turbine power station can be greatly reduced.
The invention also provides a peak regulation method.
The invention provides a gas turbine peak shaving power station combining liquid air energy storage, which comprises a liquid air energy storage unit and a power station unit, wherein the liquid air energy storage unit and the power station unit can respectively transmit power to a power grid, an energy storage flow path of the liquid air energy storage unit and an air inlet flow path of the power station unit are connected with the same air inlet source, and an exhaust flow path of the power station unit is used for exchanging heat with a medium in a first energy release flow path of the liquid air energy storage unit;
when the power grid is in a power utilization peak section, a first energy release flow path of the liquid air energy storage unit and the power station unit are started to synchronously transmit power to the power grid;
And starting the energy storage flow path by the liquid air energy storage unit when the power grid is in a power utilization valley section.
According to the peak shaving power station of the gas turbine combined with liquid air energy storage, the liquid air energy storage unit comprises an energy storage tank, an air preheater and an air turbine set, wherein the energy storage tank, a first heat exchange side of the air preheater and the air turbine set are sequentially connected in the same first energy release flow path, and a second heat exchange side of the air preheater is connected in the exhaust flow path.
According to the peak shaving power station of the gas turbine combined with liquid air energy storage, the liquid air energy storage unit further comprises an air compressor unit, the air compressor unit is connected with the energy storage tank through the energy storage flow path, and an air inlet of the air compressor unit and an air inlet flow path of the power station unit are connected with the same air inlet source.
According to the gas turbine peak shaving power station combining liquid air energy storage, the power station unit comprises a gas turbine air compressor, a combustion chamber and a turbine group, wherein the air inlet end of the combustion chamber is connected with the gas turbine air compressor, the air outlet end of the combustion chamber is connected with the turbine group, and the air outlet of the turbine group is connected with the air outlet flow path; the power output shaft of the turbine group can be opened and closed and is connected with the power input shaft of the gas turbine air compressor.
According to the peak shaving power station of the gas turbine combined with liquid air energy storage, the liquid air energy storage unit is provided with a second energy release flow path, and the air inlet end of the second energy release flow path is connected with the first energy release flow path and is positioned in front of the air inlet end of the air preheater; and the air outlet end of the second energy release flow path is connected with the combustion chamber.
According to the invention, the peak shaving power station of the gas turbine combined with liquid air energy storage is provided, and the liquid air energy storage unit further comprises:
The first heat exchange side and the second heat exchange side of the compression heat utilization device are respectively connected to the energy storage flow path and the first energy release flow path, and the first heat exchange side of the air preheater is connected between the second heat exchange side of the compression heat utilization device and the air turbine unit;
A regenerator having a first heat exchange side connected to the energy storage flow path between the compression heat utilization device and the energy storage tank, and a second heat exchange side connected to the first energy release flow path between the energy storage tank and the compression heat utilization device;
a throttling element connected in the energy storage flow path between the first heat exchange side of the regenerator and the energy storage tank;
A drive pump connected in the first energy release flow path between the energy storage tank and the second heat exchange side of the regenerator;
The air inlet end of the second energy release flow path is connected with the first energy release flow path between the compression heat utilization device and the air preheater.
According to the peak shaving power station of the gas turbine combined with liquid air energy storage, an air inlet flow path of the power station unit is connected with an air inlet source through a first air inlet valve, and an energy storage flow path of the liquid air energy storage unit is connected with the air inlet source through a second air inlet valve; an exhaust valve is arranged on the exhaust flow path; and a third air inlet valve is arranged on the second energy release flow path.
According to the peak shaving power station of the gas turbine combined with liquid air energy storage, the turbine set is connected with a first generator, the air turbine set is connected with a second generator, and the air compressor set is connected with a motor;
the first generator is connected with a power grid through a first power transmission line;
the second generator is connected with the power grid through a second power transmission line;
the power grid is connected with the motor through a driving power transmission line.
According to the invention, a peak shaving power station of a gas turbine combined with liquid air energy storage is provided, and the air inlet source is connected with at least one air filter.
The invention also provides a peak shaving method which is executed by the gas turbine peak shaving power station combined with liquid air energy storage; the peak shaving method comprises the following steps:
Respectively starting a first energy release flow path of a liquid air energy storage unit and a power station unit when a power grid is in a power utilization peak section so as to synchronously transmit power to the power grid by utilizing the first energy release flow path and the power station unit;
And closing the power station unit when the power grid is in a power utilization valley section, and starting an energy storage flow path of the liquid air energy storage unit.
The invention provides a gas turbine peak shaving power station combining liquid air energy storage, which comprises a liquid air energy storage unit and a power station unit, wherein the liquid air energy storage unit and the power station unit can respectively transmit power to a power grid, an energy storage flow path of the liquid air energy storage unit and an air inlet flow path of the power station unit are connected to the same air inlet source, and an air outlet flow path of the power station unit is used for exchanging heat with a medium in a first energy release flow path of the liquid air energy storage unit; when the power grid is in a power utilization peak section, a first energy release flow path of the liquid air energy storage unit and the power station unit are started to synchronously transmit power to the power grid; and starting an energy storage flow path by the liquid air energy storage unit when the power grid is in the electricity utilization valley section. The fuel gas peak regulation power station can utilize low-valley electricity to start an energy storage flow path of the liquid air energy storage unit in a low-valley period of electricity consumption, so as to realize the effect of filling the valley; and the first energy release flow path of the liquid air energy storage unit is utilized to synchronously transmit power with the power station unit at the power utilization peak section. In other words, the gas peak regulation power station can be used for improving the peak section discharge power of the gas peak regulation power station in a multiplied manner, and can be used for storing electricity in a power consumption valley section to realize the bidirectional peak regulation of the gas peak regulation power station, greatly improve the working efficiency and the power generation capacity of the gas turbine, and the output power of the gas peak regulation power station in the power consumption peak can reach 200-300% of the original power.
In addition, the gas turbine peak shaving power station can preheat a medium in the first energy release flow path of the liquid air energy storage unit by utilizing the high-temperature exhaust waste heat of the power station unit, and steam Rankine cycle is not required to be additionally arranged on the high-temperature exhaust of the power station unit, so that the overall structural complexity of the power station is effectively reduced.
In addition, in the construction process of the gas turbine peak shaving power station, since the power station unit and the liquid air energy storage unit can share a large amount of public engineering facilities, facility transformation can be directly carried out on the basis of the original gas turbine power station, so that compared with the construction of the liquid air energy storage power station in the prior art, the initial investment of the power station transformation can be obviously reduced, the construction cost is reduced, the application of the liquid air energy storage device is more economical, and the application range and the flexibility of the traditional gas turbine power station are favorably expanded.
The invention also provides a peak shaving method which is executed by the gas turbine peak shaving power station combined with the liquid air energy storage, so that the peak shaving method has all the advantages of the gas turbine peak shaving power station combined with the liquid air energy storage, and detailed descriptions are omitted.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The gas turbine peaking plant (which may be simply referred to as a "gas turbine peaking plant" or "peaking plant" in embodiments of the present invention) incorporating liquid air energy storage of the present invention, and the peaking method performed by the peaking plant, are described below in conjunction with fig. 1 and 2.
Specifically, as shown in fig. 1, the gas turbine peak shaver power station comprises a liquid air energy storage unit and a power station unit which can respectively transmit power to the power grid 16. The energy storage flow path of the liquid air energy storage unit and the air inlet flow path of the power station unit are connected with the same air inlet source. At the peak of electricity consumption of the power grid 16, the first energy release flow path 23 of the liquid air energy storage unit and the power station unit are started to synchronously transmit electricity to the power grid 16, so that the working efficiency and the power generation capacity of the gas turbine are greatly improved. In the electricity consumption valley section of the power grid 16, the liquid air energy storage unit starts an energy storage flow path, so that the energy storage flow path of the liquid air energy storage unit is started by using low-valley electricity in the electricity consumption valley section, and the valley filling effect is realized. Therefore, the gas turbine peak shaving power station can realize the bidirectional peak shaving and valley shaving functions of the whole peak shaving and valley filling in each power utilization period of the power grid 16.
In addition, in the gas turbine peak shaving power station, the exhaust flow path of the power station unit is used for exchanging heat with the medium in the first energy releasing flow path 23 of the liquid air energy storage unit, so that the medium in the first energy releasing flow path 23 of the liquid air energy storage unit is preheated by utilizing the high-temperature exhaust waste heat of the power station unit, the steam Rankine cycle is not required to be additionally arranged for high-temperature exhaust of the power station unit, and the overall structural complexity of the power station is effectively reduced.
In some embodiments, as shown in FIG. 1, an air preheater 14 is provided on the first de-energized flow path 23 of the liquid air energy storage unit. Wherein a first heat exchange side of the air preheater 14 is connected to the first energy release flow path 23 and a second heat exchange side of the air preheater 14 is connected to the exhaust flow path. The high-temperature gas exhausted by the power station unit exchanges heat with the medium in the first energy release flow path 23 of the liquid air energy storage unit in the air preheater 14, so that the following implementation is realized: on one hand, the high-temperature gas exhausted by the power station unit is rapidly cooled, so that the subsequent safe emission is facilitated; on the other hand, the air of the temperature and pressure of the air preheater 14, which flows through the first energy release flow path 23 of the liquid air energy storage unit, is preheated before entering the air turbine unit 15, thereby improving the working efficiency of the air turbine unit 15.
It will be appreciated that the air preheater 14 is preferably one or a combination of a shell and tube configuration, a plate and fin configuration, and a coiled tube configuration.
In some embodiments, as shown in FIG. 1, the liquid air energy storage unit includes an energy storage tank 12 and an air turbine unit 15. The energy storage tank 12, the first heat exchange side of the air preheater 14, and the air turbine assembly 15 are connected in sequence in the same first energy release flow path 23. The liquid air stored in the energy storage tank 12 is gradually warmed up through the first energy release flow path 23 and then is converted into high-temperature high-pressure air again, so that the air enters the air turbine unit 15 to do work to realize power generation after being preheated before the stage of the air preheater 14, and the energy release stage of the liquid air energy storage unit is realized.
In some embodiments, the liquid air energy storage unit further comprises an air compressor train 8. The air inlet of the air compressor unit 8 and the air inlet flow path of the power station unit are connected to the same air inlet source, and flexible switching and quick response between the power station unit and the energy storage flow path of the liquid air energy storage unit are realized in different electricity utilization stages of the power grid 16 by switching the air inlet flow paths. The air compressor unit 8 is connected with the energy storage tank 12 through an energy storage flow path, so that after air is compressed into high-pressure air by the air compressor unit 8, the air is gradually cooled through the energy storage flow path and converted into liquid air, and finally the liquid air is stored in the energy storage tank 12, and the energy storage stage of the liquid air energy storage unit is realized.
In some embodiments, the liquid air energy storage unit further comprises a compression heat utilization device 9, a regenerator 10, a throttling element 11 and a drive pump 13. The first heat exchange side and the second heat exchange side of the compression heat utilization device 9 are connected to the energy storage flow path and the first energy release flow path 23, respectively. Preferably, the first heat exchange side of the air preheater 14 is connected between the second heat exchange side of the compression heat utilization device 9 and the air turbine set 15. The compression heat utilization device 9 can store the compression heat of the compressed air in the energy storage stage of the liquid air energy storage unit, so that the air flowing through the compression heat utilization device 9 in the energy release stage of the liquid air energy storage unit is heated. The first heat exchange side of the regenerator 10 is connected in an energy storage flow path between the compression heat utilization device 9 and the energy storage tank 12, the second heat exchange side of the regenerator 10 is connected in a first energy release flow path 23 between the energy storage tank 12 and the compression heat utilization device 9, and the regenerator 10 can reserve the cold energy of the liquid air flowing through the regenerator 10 in the energy release stage of the liquid air energy storage unit, so as to cool the normal temperature and high pressure air flowing through the regenerator 10 in the energy storage stage of the liquid air energy storage unit. The throttling element 11 is connected in the energy storage flow path between the first heat exchange side of the regenerator 10 and the energy storage tank 12, and the throttling element 11 can decompress and expand the cooled low-temperature high-pressure air in the energy storage stage so as to convert the air into liquid air. The driving pump 13 is connected to the first energy release flow path 23 between the energy storage tank 12 and the second heat exchange side of the regenerator 10, and the driving pump 13 can realize start-stop response according to the control signal of the power grid 16, so that the first energy release flow path 23 of the liquid air energy storage unit is started in time when the power grid 16 enters the electricity consumption peak section, and the liquid air in the energy storage tank 12 enters the regenerator 10 after the supercharging effect of the driving pump 13.
It will be appreciated that the air compressor package 8 is preferably of the piston, screw or centrifugal type construction. Preferably, the air compressor package 8 includes one or more compressors. The individual units are integrated in series, parallel or both to form an air compressor unit 8. Each compressor stage may be followed by a compression heat utilization device 9.
It is to be understood that the preferred embodiment of the air turbine 15 is preferably radial, axial or radial-axial. Preferably, the air turbine assembly 15 includes one or more turbines, each of which is integrated in series, parallel, or both to form the air turbine assembly 15. A preheater is preferably provided before each stage of the turbine.
It will be appreciated that the compression heat utilisation device 9 preferably uses the stored compression heat both for preheating the inlet air of the air turbine unit 15 and for producing domestic hot water, heating water or for driving the absorption refrigeration unit for cooling. For example, the compression heat utilization device 9 is a lithium bromide unit or an ammonia water unit.
It is appreciated that it is preferred that the regenerator 10 employ one or a combination of more of a liquid phase regenerator 10, a solid phase regenerator 10, or a phase change material regenerator 10. The cold storage medium of the liquid phase cold storage device 10 is preferably at least one of methanol, propane and R123. The cold storage medium of the solid phase cold storage device 10 is preferably at least one of metal, rock and glass. Preferably, in regenerator 10, the liquid or gaseous air is in direct or indirect contact with the regenerator medium for heat exchange. Preferably, the regenerator 10 comprises one or more stages of regenerators, each stage of regenerators being configured in series, parallel, or a combination of series and parallel.
It is understood that the throttling element 11 is preferably a cryogenic expander or a throttle valve.
It is understood that the energy storage tank 12 is preferably a dewar tank or a cryogenic tank.
It will be appreciated that the pump body structure of the cryopump is preferably piston or centrifugal.
In some embodiments, as shown in fig. 1, the power plant unit includes a gas turbine air compressor, a combustor 3, and a turbomachine 4. The air inlet end of the combustion chamber 3 is connected with a gas turbine air compressor, the air outlet end of the combustion chamber 3 is connected with the turbine set 4, so that high-pressure air compressed by the gas turbine air compressor is fully combusted with fuel in the combustion chamber 3, and generated heat energy drives the turbine set 4 to rotate to apply work, thereby realizing power transmission to the power grid 16. The exhaust port of the turbo group 4 is connected to an exhaust flow path to introduce high temperature gas generated and discharged by the work of the turbo group 4 into the air preheater 14.
In some embodiments, the power output shaft of the turbomachine 4 is connected to the power input shaft of a gas turbine air compressor. Because the power station unit is in the power generation process, the turbine can output at least 60% of shaft work for driving the gas turbine air compressor to operate when doing work and generating power, the power generation power of the power station unit at the peak section of the power grid can be greatly reduced, the situation that the generated energy of the turbine group is insufficient can be effectively compensated by combining the liquid air energy storage unit, and the total generated energy of the gas turbine peak regulation power station at the peak section of the power grid, particularly at the peak moment, is further improved.
In some embodiments, as shown in fig. 2, it is preferred that the liquid air energy storage unit is further provided with a second energy release flow path 24. The intake end of the second energy release flow path 24 is connected to the first energy release flow path 23 and is located before the intake end of the air preheater 14. Preferably, the air intake end of the second energy release flow path 24 is connected to the first energy release flow path 23 between the compression heat utilization device 9 and the air preheater 14. The air outlet end of the second energy release flow path 24 is connected with the combustion chamber 3. The arrangement can enable part of high-temperature high-pressure gas generated in the first energy release flow path 23 of the peak regulation power station for storing energy by utilizing liquid air to directly flow into the combustion chamber 3 of the power station unit through the second energy release flow path 24 when the power grid is in a power utilization peak section, so that the high-pressure gas entering the combustion chamber through the gas turbine air compressor unit 2 is supplemented or replaced to participate in combustion. In other words, this arrangement makes it possible to disconnect the shaft connection between the turbomachine 4 and the gas turbine air compressor package 2 at the electricity peak segment, and to use the entire energy of the turbomachine 4 for power generation, in which case the power generation requirement of the electricity network 16 at the electricity peak segment can be met even if the gas turbine air compressor package 2 is shut down.
It is understood that the group of turbines 4 is preferably connected to a first generator 20. Preferably, the air turbine unit 15 is connected to a second generator 21. Preferably, the air compressor package 8 is connected to an electric motor 22. The first generator 20 is preferably connected to the grid 16 via a first transmission line 17. Preferably, the second generator 21 is connected to the grid 16 via a second transmission line 18. Preferably, the power grid 16 is connected to an electric motor 22 via a drive transmission line 19.
It is understood that the power station unit is preferably a gas turbine power station, and further preferably the power station is configured in a separate gas turbine unit type structure or a gas-steam combined cycle type structure, and the power supply form of the power station unit is preferably a pure power supply type or a cogeneration type.
It will be appreciated that the fuel used in the combustion chamber 3 of the power station unit is preferably at least one of natural gas, biogas, kerosene or diesel.
It is to be understood that the turbomachine 4 is preferably of radial, axial or radial-axial design. Preferably, the turbomachine 4 comprises one or more turbines. Each turbine is integrated in series, parallel or both to form a group 4 of turbines. A preheater may preferably be provided before the stage of each stage of turbine.
In some embodiments, as shown in fig. 1, the intake flow path of the power station unit is preferably connected to an intake source through a first intake valve 5. The energy storage flow path of the liquid air energy storage unit is preferably connected to the intake air source via a second intake valve 6, for example, the intake end of the air compressor unit 8 of the liquid air energy storage unit is connected to the intake air source via the second intake valve 6. Preferably, the exhaust valve 7 is provided in the exhaust passage. Preferably, the second energy release flow path 24 is provided with a third intake valve 25. The arrangement can utilize the cooperative opening and closing and opening adjustment of the first air inlet valve 5 and the second air inlet valve 6, so that the peak shaving power station can flexibly respond to and switch and start the power station unit and the liquid air energy storage unit when the power grid 16 is switched to different power utilization periods; the opening and closing of the third air inlet valve 25 and the opening degree are utilized to flexibly control the opening and closing of the second energy release flow path 24 and the flow rate and the flow quantity of the high-pressure air in the second energy release flow path 24; the exhaust emission of the power station unit is flexibly controlled by opening and closing the exhaust valve 7 and adjusting the opening, so that the air inflow and the air inflow flow rate of the air preheater 14 are adjusted. And further, the overall response efficiency and the intelligent control degree of the peak shaving power station are improved.
It will be appreciated that the above-described air intake source is preferably connected to at least one air filter 1. The air filter 1 can perform preliminary filtration on air from an air inlet source, so that the air inlet purity of the power station unit and the liquid air energy storage unit is improved, and the working efficiency of the power station unit and the liquid air energy storage unit is further improved.
The invention also provides a peak shaving method which is executed by the gas turbine peak shaving power station combined with the liquid air energy storage, so that the peak shaving method has all the advantages of the gas turbine peak shaving power station combined with the liquid air energy storage, and the advantages of the peak shaving method are not repeated herein.
In this peak shaving method, the power grid 16 is divided into a power level section, a power valley section, and a power peak section according to the amount of power load. The electricity consumption level segment refers to that the electricity consumption of the electric network 16 is in an average level range, and the average level range is obtained according to comprehensive evaluation of actual electricity consumption data such as the whole electricity consumption, the annual average electricity consumption, the monthly average electricity consumption, the daily average electricity consumption and the like of the users where the electric network 16 is located; the electricity consumption peak section refers to a period when the electricity consumption load of the electricity grid 16 is lower than the average level range, and the electricity consumption peak section refers to a period when the electricity consumption load of the electricity grid 16 is higher than the average level range.
In this peak shaving method, the power station unit is shut down and the energy storage flow path of the liquid air energy storage unit is started when the power grid 16 is in the electricity consumption valley section.
Specifically, as shown in fig. 1, in the electricity consumption valley section of the power grid 16, the power station unit is turned off, and the liquid air energy storage unit starts the energy release stage. Closing the first air inlet valve 5, opening the second air inlet valve 6, filtering air from an air source through the air filter 1, and then entering the air compressor unit 8 of the liquid air energy storage unit; the flexible regulation and control of the air inflow and the air inflow velocity of the air compressor unit 8 is realized by using the opening adjustment of the second air inlet valve 6. And, the air compressor unit 8 is driven to operate by using low-valley electricity from the electric network 16 (for example, electric energy is input to the motor 22 by the electric network 16 at night) so as to compress normal-temperature and normal-pressure air to medium-temperature and high-pressure air, the medium-temperature compression heat is recycled by the compression heat utilization device 9, then the high-pressure air cooled to the normal-temperature enters the regenerator 10 to be cooled to low temperature, and after the pressure reduction and expansion of the throttling element 11, the generated liquid air is stored in the energy storage tank 12, so that the energy storage process of the energy storage flow path of the liquid air energy storage unit is completed.
In the peak shaving method, the first energy release flow path 23 of the liquid air energy storage unit and the power station unit are respectively started in the electricity utilization peak section of the electric network 16, so that the first energy release flow path 23 and the power station unit can be used for synchronously transmitting electricity to the electric network 16.
Specifically, as shown in fig. 1, at the electricity peak section of the electric network 16, the power station unit is driven to stably operate at rated power, the first air inlet valve 5 and the air outlet valve 7 are respectively opened, and the second air inlet valve 6 is closed, so that the air of the air inlet source enters the air compressor unit 2 of the gas turbine to be compressed to medium temperature and high pressure after the air is filtered by the air filter 1. The flexible regulation and control of the air inflow and the air inflow velocity of the air compressor unit 2 of the gas turbine is realized by using the opening degree regulation of the first air inlet valve 5. The medium-temperature and high-pressure air enters the combustion chamber 3 and fuel is mixed and combusted to form high-temperature and high-pressure gas, so that the turbine group 4 is pushed to rotate to do work by utilizing the energy of the high-temperature and high-pressure gas.
In addition, when the power grid 16 judges that the liquid air is in the electricity consumption peak section, namely, the driving pump 13 of the liquid air energy storage unit is started through the control signal, the liquid air in the energy storage tank 12 enters the cold accumulator 10 after being pressurized by the driving pump 13, and the cold energy of the liquid air is reserved in the cold accumulator 10 so as to be convenient to use in the energy storage stage. The high-pressure air after the re-warming enters the air preheater 14 after being heated by the compression heat utilization device 9, and is heated and warmed up under the preheating effect of high-temperature exhaust gas led out from an exhaust flow path of the power station unit, so that the preheating is realized. The preheated high-pressure air enters the air turbine unit 15 to expand and do work and drive the second generator 21 to generate electricity, so that the generated electricity is transmitted to the power grid 16 through the second power transmission line 18, and the energy release process of the first energy release flow path 23 of the liquid air energy storage unit is completed.
During the working process of the turboset 4, on the one hand, the first generator 20 is driven to generate electricity and the electricity is transmitted to the power grid 16 through the first transmission line 17; on the other hand, the power output shaft of the turbine can also output shaft work for the gas turbine air compressor unit 2, so that the gas turbine air compressor unit 2 is driven to operate.
Or based on the working state of the power station unit, after the air medium in the first energy release pipeline 23 of the liquid air energy storage unit is heated to high-temperature high-pressure gas through the compression heat utilization device 9, one part of the air medium is preheated through the air preheater 14 and enters the air turbine unit 15 to expand and do work to generate power, and the other part of the air medium flows into the combustion chamber 3 of the power station unit through the second energy release flow path 24 to be combusted.
Or under the condition that the flow rate of the high-temperature and high-pressure gas passing through the second energy release flow path 24 is large enough, the gas turbine air compressor unit 2 can be closed, so that the power station unit takes the high-pressure gas generated in the energy release stage of liquid air energy storage as energy to participate in combustion work in the combustion chamber 3, and the whole power of the turbine unit 4 is promoted to be used for generating electricity, and the generated power of the turbine unit 4 is further promoted.
It will be appreciated that the power transmission process of the power station unit and the energy release process of the liquid air energy storage unit may be run in parallel or in tandem or intermittently with respect to each other, preferably at peak segments of the power grid 16.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.