CN215979806U - Compressed air energy storage system and renewable energy system - Google Patents
Compressed air energy storage system and renewable energy system Download PDFInfo
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- CN215979806U CN215979806U CN202121705884.2U CN202121705884U CN215979806U CN 215979806 U CN215979806 U CN 215979806U CN 202121705884 U CN202121705884 U CN 202121705884U CN 215979806 U CN215979806 U CN 215979806U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The utility model provides a compressed air energy storage system and a renewable energy system, wherein the compressed air energy storage system comprises: the compressor set is connected with the gas storage device through the first heat exchanger set, the gas storage device is connected with the power generation device, the compressor set comprises a plurality of compressors with the rated powers increasing in sequence, the compressors are connected in parallel, and the sum of the rated powers of the plurality of compressors is larger than or equal to the preset power of the compressed air energy storage system. According to the compressed air energy storage system provided by the utility model, when energy is stored, the compressor unit flexibly adjusts the operation of the compressor unit according to the redundant power capacity of renewable energy grid connection, the compressor with corresponding rated power is started, and air is compressed and stored to the air storage device; by arranging a plurality of groups of compressors with different powers, the energy storage capacity is tracked and adjusted to adapt to the conditions of grid-connected fluctuation and redundancy of renewable energy sources, the compressor set is ensured to operate under the optimal working condition, and the loss of clean electric energy is effectively reduced.
Description
Technical Field
The utility model relates to the technical field of renewable energy power energy storage, in particular to a compressed air energy storage system and a renewable energy system.
Background
The continuous exhaustion of fossil energy and the increasing deterioration of the environment become important bottleneck problems restricting the development of global economy and society, and the large-scale development and utilization of renewable energy become inevitable choices for the development of global energy. Wind energy and solar energy are distributed most widely and abundantly and are the key points of development and utilization of renewable energy sources, but wind energy and solar energy are unstable and intermittent, and bring huge impact on scheduling, operation modes, reliability and operation cost of a power grid, so that large-scale wind and light abandoning phenomena are caused.
The energy storage technology can effectively solve the problems of wind abandonment and light abandonment, realize large-scale grid connection of renewable energy power generation, realize peak clipping and valley filling of a conventional power system, and improve the efficiency, safety and economy of conventional energy power generation and power transmission. The compressed air energy storage technology has the advantages of large scale, low cost, long service life, small unit investment and the like, does not need a large-scale gas storage device, has no geographical condition limitation, and is considered to be one of the large-scale energy storage technologies with the most development potential.
The traditional compressed air energy storage system has fixed energy storage capacity, a motor matched with a compressor can only be selected according to the maximum operation rated power, the operation working condition range of a single compressor is limited, and the energy storage power cannot be flexibly adjusted. When the output of the surplus electric quantity of the renewable energy source is smaller than the configured running power of the compressor, the compressor cannot be started, and the energy storage system cannot run, so that the defects of intermittence and instability of the renewable energy source cannot be adapted.
SUMMERY OF THE UTILITY MODEL
The utility model provides a compressed air energy storage system and a renewable energy system, which are used for solving the defects that the compressor of the traditional compressed air energy storage system in the prior art is fixed in power and cannot adapt to the intermittence and instability of renewable energy, realizing the tracking and adjustment of the operation of the compressor according to the power generation grid-connection requirement of the renewable energy, greatly improving the practicability of the compressed air energy storage system and effectively reducing the loss of clean electric energy.
The utility model provides a compressed air energy storage system, comprising: the compressor unit is connected with the gas storage device through the first heat exchanger group, the gas storage device is connected with the power generation device,
the compressor unit comprises a plurality of compressors with sequentially increased rated power, the compressors are connected in parallel, the compressors correspond to the first heat exchangers of the first heat exchanger group one by one, and the sum of the rated power of the plurality of compressors is larger than or equal to the preset power of the compressed air energy storage system.
According to the compressed air energy storage system provided by the utility model, the compressor set comprises 4 compressors, and the rated power ranges of the 4 compressors are 5% -10%, 15% -25%, 30% -45% and 50% -70% of the preset power of the compressed air energy storage system in sequence.
According to the compressed air energy storage system provided by the utility model, the air storage device comprises a plurality of air storage tanks which are arranged in parallel, and each air storage tank controls the switch independently.
According to the compressed air energy storage system provided by the utility model, the power generation device comprises a second heat exchanger, an expander and a power generator, one end of the second heat exchanger is connected with the gas storage device, the other end of the second heat exchanger is connected with the expander, and the expander is connected with the power generator.
The compressed air energy storage system further comprises a heat storage system and a cold storage system, the first heat exchanger comprises a first heat exchange side and a second heat exchange side, the second heat exchanger comprises a third heat exchange side and a fourth heat exchange side,
one end of the heat storage system is connected with the second heat exchange side outlet, the other end of the heat storage system is connected with the fourth heat exchange side inlet, one end of the cold storage system is connected with the second heat exchange side inlet, and the other end of the cold storage system is connected with the fourth heat exchange side outlet.
And two ends of the first heat exchange side are respectively connected with the compressor and the gas storage tank, and two ends of the third heat exchange side are respectively connected with the gas storage tank and the expander.
According to the compressed air energy storage system provided by the utility model, the heat storage system comprises a heat storage tank and a heat pump which are connected in parallel, one end of the heat storage tank is connected with an outlet of the second heat exchange side, the other end of the heat storage tank is connected with the heat pump, and the heat pump is connected with an inlet of the fourth heat exchange side.
According to the compressed air energy storage system provided by the utility model, the cold storage system comprises a cold storage tank, a cold pump and a cooling mechanism which are connected in series, one end of the cold pump is connected with the inlet of the second heat exchange side, the other end of the cold pump is connected with the cold storage tank,
and one end of the cooling mechanism is connected with the cold storage tank, and the other end of the cooling mechanism is connected with an outlet of the fourth heat exchange side.
According to the compressed air energy storage system provided by the utility model, the heat storage system further comprises a heat supply pump, the heat supply pump is connected with the heat storage tank, and the heat supply pump can be connected with an external heat supply system.
According to the compressed air energy storage system provided by the utility model, the expander is a multi-stage expander, and the multi-stage expander corresponds to the plurality of second heat exchangers.
The utility model also provides a renewable energy system which comprises a renewable energy power generation device, a variable-voltage grid-connected device and the compressed air energy storage system, wherein the renewable energy power generation device is respectively connected with the compressor unit and the variable-voltage grid-connected device in the compressed air energy storage system, and the power generation device is connected with the variable-voltage grid-connected device.
According to the compressed air energy storage system and the renewable energy system, when energy is stored, the compressor unit flexibly adjusts the operation of the compressor unit according to the redundant power capacity of renewable energy grid-connected, the compressor with corresponding rated power is started, and air is compressed and stored to the air storage device; when energy is released, the power generation device is used for supplementing the insufficient grid-connected capacity of the renewable energy. Through arranging a plurality of groups of compressors with different powers, the energy storage capacity is tracked and adjusted to adapt to the grid-connected fluctuation and redundancy condition of renewable energy sources, the compressor unit is ensured to operate under the optimal working condition, the practicability of compressed air energy storage in renewable energy source engineering is greatly improved, and the loss of clean electric energy is effectively reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of the connection relationship of the renewable energy system provided by the present invention;
fig. 2 is a schematic connection diagram of the compressed air energy storage system provided by the utility model.
Reference numerals:
100: a compressor unit; 101: a compressor; 200: a first heat exchanger group;
201: a first heat exchanger; 300: a gas storage device; 301: a gas storage tank;
400: a power generation device; 401: a second heat exchanger; 402: an expander;
403: a generator; 500: a heat storage system; 501: a heat storage tank;
502: a heat pump; 503: a heat supply pump; 600: a cold storage system;
601: a cold storage tank; 602: a cold pump; 603: a cooling mechanism;
710: voltage transformation grid-connected device. 701: wind power generation; 702: solar power generation;
700: provided is a renewable energy power generation device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the embodiments of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be configured in a specific orientation, and operate, 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 the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 an embodiment of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
An embodiment of the present invention will be described below with reference to fig. 1 to 2. It is to be understood that the following description is only exemplary embodiments of the present invention and is not intended to limit the present invention.
As shown in fig. 1, a renewable energy system includes a renewable energy power generation device 700 and a voltage transformation grid-connected device 710, the renewable energy power generation device 700 is connected to a compressor unit 100 and the voltage transformation grid-connected device 710 of a compressed air energy storage system, respectively, and a power generation device 400 of the compressed air energy storage system is connected to the voltage transformation grid-connected device 710.
The renewable energy power generation apparatus 700 includes a plurality of power generation modes, such as wind power generation 701 and solar power generation 702.
Specifically, when the generated energy of the renewable energy power generation device 700 is greater than the capacity required by the voltage transformation grid-connected device 710, the compressed air energy storage system starts to store energy; when the generated energy of the renewable energy power generation device 700 is smaller than the capacity required by the voltage transformation grid-connected device 710, the compressed air energy storage system starts to release energy so as to supplement the insufficient grid-connected capacity of the renewable energy power generation device 700.
As shown in fig. 2, the present invention provides a compressed air energy storage system comprising: the system comprises a compressor unit 100, a first heat exchanger group 200, a gas storage device 300 and a power generation device 400, wherein the compressor unit 100 is connected with the gas storage device 300 through the first heat exchanger group 200, and the gas storage device 300 is connected with the power generation device 400.
The compressor unit 100 comprises a plurality of compressors 101 with sequentially increased rated power, the compressors 101 are connected in parallel, the compressors 101 correspond to the first heat exchangers 201 of the first heat exchanger group 200 one by one, and the sum of the rated power of the compressors 101 is greater than or equal to the preset power of the compressed air energy storage system.
In other words, one compressor 101 corresponds to one first heat exchanger 201, the compressors 101 are connected in series with the first heat exchangers 201, the compressors 101 are connected in parallel, further, the first heat exchangers 201 are connected in parallel, the rated power of each compressor 101 is different, and the rated power of all the compressors 101 is distributed in a stepped manner. The sum of the rated powers of all the compressors 101 is equal to or greater than the total power of the entire compressed air energy storage system. Each first heat exchanger 201 independently controls the discharge temperature of one compressor 101.
Wherein each compressor 101 is equipped with a motor, and after the rated power of each compressor 101 is determined, the compressor 101 can select a reciprocating compressor or a centrifugal compressor according to the flow rate. The discharge pressure of each compressor 101 is the same and equal to the rated design pressure of the gas storage device 300.
In addition, the motor is connected to the renewable energy power generation device 700, and the compressor unit 100 flexibly operates the compressors 101 of different rated powers in the compressor unit 100 to store energy according to the excess power capacity of the renewable energy power generation device 700 connected to the grid.
In an embodiment of the present invention, the compressor set 100 includes 4 compressors 101, and the rated power ranges of the 4 compressors 101 are 5% -10%, 15% -25%, 30% -45% and 50% -70% of the preset power of the compressed air energy storage system in sequence.
In other words, the compressor set 100 includes a first compressor, a second compressor, a third compressor and a fourth compressor, wherein the rated power of the first compressor is 5% -10% of the preset power of the compressed air energy storage system; the rated power of the second compressor is 15% -25% of the preset power of the compressed air energy storage system; the rated power of the third compressor is 30% -45% of the preset power of the compressed air energy storage system; the rated power of the fourth compressor is 50% -70% of the preset power of the compressed air energy storage system.
Further, in an alternative embodiment of the present invention, the compressed air energy storage system is preset with a power, and the rated power of the first compressor is selected to be 7.5% a, the rated power of the second compressor is selected to be 15% a, the rated power of the third compressor is selected to be 30% a, and the rated power of the fourth compressor is selected to be 50% a.
When the excessive power generation amount of the renewable energy power generation device 700 is lower than 1/2 of the rated power of the first compressor, that is, lower than 3.75% a of the present embodiment. The compressed air energy storage system does not store energy. When the redundant power generation amount of the renewable energy power generation device 700 is 3.75% a to 7.5% a, the first compressor works alone, the motor drives the first compressor to compress, and the high-temperature gas is cooled and stored in one or more gas storage tanks 301 of the gas storage device 300 through the first heat exchanger 201.
Similarly, when the excessive power generation amount of the renewable energy power generation device 700 is 7.5% a to 15% a, the second compressor alone operates. When the surplus power generation amount of the renewable energy power generation device 700 is 15% a to 30% a, the third compressor alone operates. When the excessive power generation amount of the renewable energy power generation device 700 is 30% a to 50% a, the fourth compressor alone operates.
Further, when the surplus power generation of the renewable energy power generation device 700 is 50% a to 57.5% a, the first compressor and the fourth compressor work together. When the surplus power generation amount of the renewable energy power generation device 700 is 57.5% a to 65% a, the second compressor and the fourth compressor work together. When the surplus power generation amount of the renewable energy power generation device 700 is 65% a to 80% a, the third compressor and the fourth compressor work together. When the excessive power generation amount of the renewable energy power generation device 700 is 80% a to 95% a, the second compressor, the third compressor, and the fourth compressor work together. When the excess power generation amount of the renewable energy power generation device 700 is 95% a or more, the first compressor, the second compressor, the third compressor, and the fourth compressor work together.
Of course, depending on the rated power of the selected compressor, the compressors corresponding to the excess power generation amount of the renewable energy power generation device 700 at different stages are different. And matching according to actual conditions. Wherein the sum of the rated powers of all the compressors should be equal to or greater than 100% A.
Specifically, in an alternative embodiment of the present invention, the gas storage device 300 comprises a plurality of gas storage tanks 301 arranged in parallel, and each gas storage tank 301 controls a switch individually.
Each air storage tank 301 is connected with the compressor unit 100, the pressure of each air storage tank 301 can be different, the valve of the corresponding air storage tank 301 is opened timely according to the discharge pressure of the compressor 101 and the real-time pressure in each air storage tank 301, and after the design pressure is reached, the valve is closed, and the energy storage process is completed sequentially.
Further, in another alternative embodiment of the present invention, the power generation apparatus 400 includes a second heat exchanger 401, an expander 402 and a generator 403, wherein one end of the second heat exchanger 401 is connected to the gas storage apparatus 300, the other end is connected to the expander 402, and the expander 402 is connected to the generator 403.
The expander 402 is a multi-stage expander, the corresponding second heat exchangers 401 include a plurality of expanders 401, one second heat exchanger 401 is connected with one expander 402 in series, the plurality of expanders are connected in series, and the plurality of second heat exchangers 401 are connected in parallel. The multiple stage expanders are all connected to a generator 403.
In addition, the rated power of the power generation device 400 should meet the maximum power generation requirement of the compressed air energy storage system, and the expander can be in a centripetal or axial flow structure.
Specifically, the second heat exchanger 401 converts the low-temperature gas in the gas storage tank 301 into high-pressure high-temperature gas, and transmits the high-pressure high-temperature gas to the expander 402, and the expander 402 generates electricity by applying mechanical work on the generator, and transmits the electricity to the variable-pressure grid-connected device 710 to supplement the insufficient electricity of the renewable energy power generation device 700.
With continued reference to fig. 2, in one embodiment of the utility model, the compressed air energy storage system further comprises a heat storage system 500 and a cold storage system 600, the first heat exchanger 201 comprises a first heat exchanging side and a second heat exchanging side, and the second heat exchanger 401 comprises a third heat exchanging side and a fourth heat exchanging side.
One end of the heat storage system 500 is connected with the second heat exchange side outlet, the other end of the heat storage system is connected with the fourth heat exchange side inlet, one end of the cold storage system is connected with the second heat exchange side inlet, and the other end of the cold storage system is connected with the fourth heat exchange side outlet. Two ends of the first heat exchange side are respectively connected with the compressor 101 and the air storage tank 301, and two ends of the third heat exchange side are respectively connected with the air storage tank 301 and the expansion machine 402.
Specifically, the cold storage system 600, the first heat exchanger 201, the heat storage system 500, and the second heat exchanger 401 form a circulation loop. The cold storage system 600 provides a low-temperature medium, and since the first heat exchange side of the first heat exchanger 201 needs to cool the high-temperature gas of the compressor 101 and then enters the gas storage tank 301, the low-temperature medium on the second heat exchange side absorbs the heat and becomes a high-temperature medium to enter the heat storage system 500. Because the third heat exchange side of the second heat exchanger 401 needs to heat the low-temperature gas in the gas storage tank 301 and then enters the expander 402, the high-temperature medium at the fourth heat exchange side releases heat and becomes the low-temperature medium and enters the cold storage system 600.
The first heat exchange side and the third heat exchange side flow gas, and the second heat exchange side and the fourth heat exchange side flow liquid. The heat of the energy storage process and the energy release process is fully utilized to form a circulation loop of the cold storage system 600, the first heat exchanger 201, the heat storage system 500 and the second heat exchanger 401.
Further, in an embodiment of the present invention, the heat storage system 500 includes a heat storage tank 501 and a heat pump 502 connected in parallel, one end of the heat storage tank 501 is connected to an outlet of the second heat exchanging side, the other end is connected to the heat pump 502, and the heat pump 502 is connected to an inlet of the fourth heat exchanging side.
In another embodiment of the present invention, the heat storage system 500 further comprises a heat supply pump 503, the heat supply pump 503 is connected to the heat storage tank 501, and the heat supply pump 503 can be connected to an external heat supply system to supply heat to the outside.
The corresponding heat storage tanks 501 are opened in due time according to the operation condition of the compressor unit, and after one heat storage tank 501 reaches the designed capacity, the inlet valve is closed, and the next heat storage tank 501 is opened to sequentially store the compression heat.
In addition, the heat storage tanks 501 connected in parallel can store heat media with different temperatures, and according to the temperature requirements of the second heat exchanger 401 and the external heating system, the inlet and outlet valves of the heat storage tanks 501 are opened and closed in due time, so that the heat media with different temperatures are stored in the different heat storage tanks 501, and the different heat storage tanks 501 are opened according to the different temperature requirements.
With continued reference to fig. 2, in another embodiment of the present invention, the cold storage system 600 includes a cold storage tank 601, a cold pump 602 and a cooling mechanism 603 connected in series, the cold pump 602 is connected to the inlet of the second heat exchanging side at one end and the cold storage tank 601 at the other end, and the cooling mechanism 603 is connected to the cold storage tank 601 at one end and the outlet of the fourth heat exchanging side at the other end.
Wherein the cooling mechanism 603 comprises a cooling pump and a cooling tower to realize self-circulation cooling. The cooling mechanism 603 ensures that the cold storage medium meets the requirements for cooling the compressor package 100.
The utility model provides a compressed air energy storage system and a renewable energy system. During energy storage, the compressor unit flexibly adjusts the operation of the unit according to the redundant power capacity of renewable energy grid connection, starts a compressor with corresponding rated power, compresses air and stores the compressed air to the air storage device, recovers the compression heat to the heat storage system, and timely adjusts the inlet and outlet valves of the heat storage tank according to the heat demand, so that different temperatures are stored in different heat storage tanks; when energy is released, the heat storage system heats compressed air through the second heat exchanger, and then the compressed air is supplied to the expansion machine for power generation, so that the shortage of the power grid-connected capacity of renewable energy sources is supplemented. Compared with the traditional compressed air energy storage system, the compressed air energy storage system has the advantages that the energy storage power of the compressor unit is in a distributed design, the system power coverage range meets the requirement of the maximum energy storage capacity, the energy storage capacity can be tracked and adjusted in real time to adapt to the grid-connected fluctuation and redundancy condition of renewable energy sources by arranging a plurality of groups of compressor units with different power and matching with the cold storage system, the heat storage system and the gas storage device, the compressor unit is ensured to operate under the optimal working condition, the practicability of the compressed air energy storage in wind-light-storage integrated engineering is greatly improved, and the problem of 'wind abandon and light abandon' is effectively reduced.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present 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 solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A compressed air energy storage system, comprising: the compressor unit is connected with the gas storage device through the first heat exchanger group, the gas storage device is connected with the power generation device,
the compressor unit comprises a plurality of compressors with sequentially increased rated power, the compressors are connected in parallel, the compressors correspond to the first heat exchangers of the first heat exchanger group one by one, and the sum of the rated power of the plurality of compressors is larger than or equal to the preset power of the compressed air energy storage system.
2. The compressed air energy storage system of claim 1, wherein the compressor unit comprises 4 compressors, and the rated power ranges of the 4 compressors are 5% -10%, 15% -25%, 30% -45% and 50% -70% of the preset power of the compressed air energy storage system in sequence.
3. The compressed air energy storage system of claim 1 wherein said air storage means comprises a plurality of air storage tanks arranged in parallel, each of said air storage tanks individually controlling a switch.
4. The compressed air energy storage system of claim 3 wherein the power generation means comprises a second heat exchanger, an expander and a generator, the second heat exchanger being connected at one end to the air storage means and at the other end to the expander, the expander being connected to the generator.
5. The compressed air energy storage system of claim 4, further comprising a heat storage system and a cold storage system, the first heat exchanger comprising a first heat exchange side and a second heat exchange side, the second heat exchanger comprising a third heat exchange side and a fourth heat exchange side,
wherein one end of the heat storage system is connected with the second heat exchange side outlet, the other end of the heat storage system is connected with the fourth heat exchange side inlet, one end of the cold storage system is connected with the second heat exchange side inlet, the other end of the cold storage system is connected with the fourth heat exchange side outlet,
and two ends of the first heat exchange side are respectively connected with the compressor and the gas storage tank, and two ends of the third heat exchange side are respectively connected with the gas storage tank and the expander.
6. The compressed air energy storage system of claim 5, wherein the heat storage system comprises a heat storage tank and a heat pump which are connected in parallel, one end of the heat storage tank is connected with the outlet of the second heat exchange side, the other end of the heat storage tank is connected with the heat pump, and the heat pump is connected with the inlet of the fourth heat exchange side.
7. The compressed air energy storage system of claim 5, wherein the cold storage system comprises a cold storage tank, a cold pump and a cooling mechanism connected in series, the cold pump is connected with the inlet of the second heat exchange side at one end and is connected with the cold storage tank at the other end,
and one end of the cooling mechanism is connected with the cold storage tank, and the other end of the cooling mechanism is connected with an outlet of the fourth heat exchange side.
8. The compressed air energy storage system of claim 6, wherein the heat storage system further comprises a heat supply pump, the heat supply pump being connected to the heat storage tank, the heat supply pump being connectable to an external heat supply system.
9. The compressed air energy storage system of claim 4 wherein the expander is a multi-stage expander, the multi-stage expander corresponding to a plurality of the second heat exchangers.
10. A renewable energy system, comprising a renewable energy power generation device, a voltage transformation grid-connected device and the compressed air energy storage system of any one of claims 1 to 9, wherein the renewable energy power generation device is connected to the compressor unit and the voltage transformation grid-connected device in the compressed air energy storage system, respectively, and the power generation device is connected to the voltage transformation grid-connected device.
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| GR01 | Patent grant | ||
| GR01 | Patent grant |