CN117167104A - Heat pump storage system - Google Patents
Heat pump storage system Download PDFInfo
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- CN117167104A CN117167104A CN202210578726.8A CN202210578726A CN117167104A CN 117167104 A CN117167104 A CN 117167104A CN 202210578726 A CN202210578726 A CN 202210578726A CN 117167104 A CN117167104 A CN 117167104A
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Abstract
The application provides a heat pump electricity storage system, comprising: the system comprises a compressor, a packed bed heat storage tank, a gas turbine, an expander, a packed bed cold storage tank and a heat exchanger; the compressor, the packed bed heat storage tank, the gas turbine, the expander, the packed bed cold storage tank and the heat exchanger are sequentially connected to form an energy storage loop, and the energy storage loop is used for converting electric energy into heat energy and storing the heat energy. According to the application, the gas turbine is utilized to recycle heat energy, so that the technical problem of poor heat energy utilization rate in the heat pump electricity storage system is solved.
Description
Technical Field
The application relates to the technical field of energy storage, in particular to a heat pump electricity storage system.
Background
With the increasing demand for storing electric energy, the heat pump electricity storage technology is widely applied due to the advantages of being not limited by geographical factors and the like, but the heat exchanger is needed in the current heat pump electricity storage technology, and heat energy loss exists when the heat exchanger is used. Therefore, the technical problem of poor heat energy utilization rate of the heat pump electricity storage system exists in the prior art.
Disclosure of Invention
The embodiment of the application provides a heat pump electricity storage system, which aims to solve the problem of poor heat energy utilization rate in the heat pump electricity storage system.
The embodiment of the application provides a heat pump electricity storage system, which comprises: the system comprises a compressor, a packed bed heat storage tank, a gas turbine, an expander, a packed bed cold storage tank and a heat exchanger; the compressor, the packed bed heat storage tank, the gas turbine, the expander, the packed bed cold storage tank and the heat exchanger are sequentially connected to form an energy storage loop, and the energy storage loop is used for converting electric energy into heat energy and storing the heat energy.
In the embodiment of the application, the first end of the compressor is connected with the first end of the packed bed heat storage tank, the second end of the packed bed heat storage tank is connected with the first end of the gas turbine, the second end of the gas turbine is connected with the first end of the expander, the second end of the expander is connected with the first end of the packed bed cold storage tank, the second end of the packed bed cold storage tank is connected with the first end of the heat exchanger, and the second end of the heat exchanger is connected with the second end of the compressor to form an energy storage loop to convert electric energy into heat energy and store the heat energy. Therefore, the heat energy utilization rate of the heat pump electricity storage system is improved due to the fact that the gas turbine is used for recycling the heat energy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments of the present application will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a block diagram of a heat pump electricity storage system provided by an embodiment of the present application;
FIG. 2 is a schematic view of a gas turbine engine according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the application. All other embodiments, which are derived by a person skilled in the art from the embodiments according to the application without creative efforts, fall within the protection scope of the application.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. "upper", "lower", "left", "right", etc. are used merely to indicate a relative positional relationship, which changes accordingly when the absolute position of the object to be described changes.
As shown in fig. 1, an embodiment of the present application provides a heat pump electricity storage system, including: a compressor 10, a packed bed heat storage tank 20, a gas turbine 30, an expander 40, a packed bed cold storage tank 50, and a heat exchanger 60; the compressor 10 and the expander 40 are connected with an external power supply, and the compressor 10, the packed bed heat storage tank 20, the gas turbine 30, the expander 40, the packed bed cold storage tank 50 and the heat exchanger 60 are sequentially connected to form an energy storage loop, and the energy storage loop is used for converting electric energy into heat energy and storing the heat energy.
In the embodiment of the present application, the compressor 10 and the expander 40 are connected to an external power source, it being understood that the compressor 10 is electrically connected to the external power source to convert electric energy into kinetic energy of the compressor 10; the expander 40 is electrically connected to an external power source, and converts electric energy into kinetic energy of the expander 40.
Alternatively, the above-mentioned energy storage circuit may be in fluid communication with a working medium, and in particular, the energy storage circuit may include the compressor 10, the packed bed heat storage tank 20, the gas turbine 30, the expander 40, the packed bed heat storage tank 50, and the heat exchanger 60, and connection pipes for connecting the respective components. For example, in some embodiments, the first end of the compressor 10 may be connected to the first end of the packed bed heat storage tank 20 through a connection pipe, the second end of the packed bed heat storage tank 20 may be connected to the first end of the gas turbine 30 through a connection pipe, the second end of the gas turbine 30 may be connected to the first end of the expander 40 through a connection pipe, the second end of the expander 40 may be connected to the first end of the packed bed heat storage tank 50 through a connection pipe, the second end of the packed bed heat storage tank 50 may be connected to the first end of the heat exchanger 60 through a connection pipe, and the second end of the heat exchanger 60 may be connected to the second end of the compressor 10 through a connection pipe. At this time, the compressor 10, the packed bed heat storage tank 20, the gas turbine 30, the expander 40, the packed bed heat storage tank 50, and the heat exchanger 60 are sequentially connected through respective connection pipes to form an energy storage circuit through which a working medium flows, thereby converting electric energy into thermal energy and storing the thermal energy.
It should be understood that the working fluid may be air.
In the embodiment of the present application, the heat storage medium is contained in the packed bed heat storage tank 20, the cold storage medium is contained in the packed bed cold storage tank 50, and the heat exchanger 60 is filled with the heat exchange medium.
When electricity is stored, the compressor 10 is connected with an external power supply, electric energy is converted into kinetic energy of the compressor 10, the compressor 10 compresses working medium, kinetic energy of the compressor 10 is converted into heat energy of the working medium, the working medium obtaining heat energy flows into the packed bed heat storage tank 20, fully exchanges heat with heat storage medium in the packed bed heat storage tank 20, fully exchanges heat with the heat storage medium in the packed bed heat storage tank, flows into the gas turbine 30, flows out of the other end of the gas turbine 30 and enters the expander 40, the expander 40 is connected with the external power supply, electric energy is converted into kinetic energy of the expander 40, the kinetic energy of the expander 40 is converted into cold energy of the working medium flowing into the expander 40 again, the working medium flows out of the expander 40, enters the packed bed heat storage tank 50, fully exchanges heat with the cold storage medium in the packed bed heat storage tank 50, fully exchanges heat with the heat storage medium in the heat exchanger 60, and finally flows back into the compressor 10.
In the embodiment of the application, the gas turbine 30 is coupled in the heat pump electricity storage system, so that the heat energy originally lost by the compressor 10 is used for the gas turbine 30, thereby realizing the recycling of the heat energy and improving the heat energy utilization rate of the heat pump electricity storage system.
Alternatively, in some embodiments, as shown in FIG. 2, the gas turbine 30 includes: the air suction device comprises a shell 31, an air compressing impeller 32 and a turbine 33, wherein the shell 31 comprises an air suction cavity 311, a combustion chamber 312 and an air discharge cavity 313, the air suction cavity 311, the combustion chamber 312 and the air discharge cavity 313 are sequentially communicated, an air inlet 3111 is formed in one end, far away from the combustion chamber 312, of the air suction cavity 311, the air inlet 3111 is connected with the packed bed heat storage tank 20, and the air suction cavity 311 is communicated with the packed bed heat storage tank 20 and the outside through the air inlet 3111; a gas outlet 3131 is arranged at one end of the exhaust cavity 313 away from the combustion chamber 312, the gas outlet 3131 is connected with the expander 40, and the exhaust cavity 313 is communicated with the expander 40 and the outside through the gas outlet 3131; the air compressing impeller 32 is arranged in the air suction cavity 311 and is used for compressing air in the air suction cavity 311 and pushing the air into the combustion chamber 312; the turbine 33 is disposed in the combustion chamber 312, and is configured to push air in the combustion chamber 312 to the exhaust chamber 313.
In an embodiment of the present application, the gas turbine 30 includes: the device comprises a shell 31, a gas-compressing impeller 32 and a turbine 33, wherein the gas-compressing impeller 32 and the turbine 33 are positioned in the shell 31, the shell 31 comprises a gas suction cavity 311, a combustion chamber 312 and a gas discharge cavity 313, a second end of the gas suction cavity 311 is communicated with a first end of the combustion chamber 312, and a second end of the combustion chamber 312 is communicated with a first end of the gas discharge cavity 313; the suction chamber 311 includes an air inlet 3111, the air inlet 3111 being located at a first end of the suction chamber 311 and communicating with the packed bed thermal storage tank 20 and the outside, the discharge chamber 313 includes a gas outlet 3131, and the gas outlet 3131 is located at a second end of the discharge chamber 313 and communicating with the expander 40 and the outside; the compressor wheel 32 is located at a position where the suction chamber 311 is communicated with the combustion chamber 312, and the turbine 33 is located at a position where the combustion chamber 312 is communicated with the exhaust chamber 313.
In the embodiment of the present application, air enters the air suction cavity 311 from the air inlet 3111, then enters the air compressing impeller 32 from the air suction cavity 311, the air is compressed under the action of the air compressing impeller 32, the compressed air enters the combustion chamber 312, the combustion chamber 312 is provided with a fuel inlet and a burner, the fuel enters the combustion chamber 312 from the fuel inlet and is fully mixed with the compressed air, the fuel is combusted under the action of the burner, the combusted gas has larger heat energy, rapidly expands, pushes the turbine 33 to rotate, converts the heat energy into kinetic energy of the turbine 33, the gas passing through the turbine 33 enters the exhaust cavity 313 again, and is discharged through the gas outlet 3131 at the second end of the exhaust cavity 313. In this way, the air with heat energy in the energy storage loop is utilized in the gas turbine 30, so that the compressed air of the air compressing impeller 32 in the gas turbine 30 is saved, and meanwhile, the utilization rate of the heat energy of the heat pump electricity storage system is improved.
Optionally, in some embodiments, the heat pump electricity storage system further includes: the first three-way valve 70, the air inlet 3111 is connected to a common port of the first three-way valve 70, a first branch port of the first three-way valve 70 is connected to the packed bed heat storage tank 20, and a second branch port of the first three-way valve 70 is connected to the outside.
In the embodiment of the present application, the first branch end of the first three-way valve 70 is responsible for guiding the air from the packed bed heat storage tank 20 to the air inlet 3111 through the common end of the first three-way valve 70, and the second branch end of the first three-way valve 70 is responsible for guiding the air from the outside to the air inlet 3111 through the common end of the first three-way valve 70.
In this embodiment of the present application, by communicating the air inlet 3111 with the common end of the first three-way valve 70, the first branch end of the first three-way valve 70 is communicated with the packed bed heat storage tank 20, and the second branch end of the first three-way valve 70 is communicated with the outside, so that the working medium in the energy storage loop can flow into the air inlet 3111, and the outside air can flow into the air inlet 3111, thereby not only utilizing the working medium in the energy storage loop, but also ensuring that the gas turbine 30 can obtain a certain amount of oxygen, and meeting the combustion conditions.
Optionally, in some embodiments, the heat pump electricity storage system further comprises: the fuel gas outlet 3131 is communicated with the common end of the second three-way valve 80, the first branch end of the second three-way valve 80 is communicated with the expander 40, and the second branch end of the second three-way valve 80 is communicated with the outside through the pressure valve 90.
In the embodiment of the present application, the first branch end of the second three-way valve 80 is responsible for guiding the air from the gas turbine 30 into the expander 40, and the second branch end of the second three-way valve 80 is responsible for guiding the air from the gas turbine 30 to the outside, but the pressure valve 90 is further disposed at a place where the second branch end of the second three-way valve 80 is in communication with the outside, and the pressure valve 90 may be directly connected to the second branch end of the second three-way valve 80 or connected to the second branch end of the second three-way valve 80 through a pipeline.
In the embodiment of the present application, the gas outlet 3131 is communicated with the common end of the second three-way valve 80, the first branch end of the second three-way valve 80 is communicated with the expander 40, and the second branch end of the second three-way valve 80 is communicated with the outside through the pressure valve 90, so that the gas in the gas turbine 30 can partially flow back to the energy storage loop, and partially flow into the outside, thereby ensuring the normal operation of the heat pump electricity storage system and the gas turbine 30.
Optionally, in some embodiments, the heat pump electricity storage system comprises: a first pressure regulating valve 100 and a buffer tank 110, wherein a first end of the first pressure regulating valve 100 is connected between the heat exchanger 60 and the compressor 10, and a second end of the first pressure regulating valve 100 is connected with the buffer tank 110.
Alternatively, the first pressure regulating valve 100 may be a three-way valve.
In this embodiment of the present application, the first end of the first pressure regulating valve 100 includes a first branch end and a second branch end, the first branch end of the first pressure regulating valve 100 is connected to the second end of the compressor 10, the second branch end of the first pressure regulating valve 100 is connected to the second branch end of the heat exchanger 60, and the second end of the first pressure regulating valve 100 is connected to the buffer tank 110.
It should be noted that, the working medium pressure of the energy storage circuit needs to be within a certain preset range, and when the working medium pressure of the energy storage circuit is lower than the minimum value in the preset range, the buffer tank 110 charges the working medium into the energy storage circuit through the first pressure regulating valve 100; when the pressure of the working medium in the energy storage loop is higher than the maximum value in the preset range, the energy storage loop releases the working medium to the buffer tank 110 through the first pressure regulating valve 100, so that the pressure and the quality of the working medium in the energy storage loop can be kept balanced.
Optionally, in some embodiments, the heat pump electricity storage system comprises: a second pressure regulating valve 120, a first end of the second pressure regulating valve 120 is connected between the packed bed heat storage tank 20 and the gas turbine 30, and a second end of the second pressure regulating valve 120 is connected to the buffer tank 110.
Alternatively, the second pressure regulating valve 120 may be a three-way valve.
In the embodiment of the present application, the first end of the second pressure regulating valve 120 includes a first branch end and a second branch end, the first branch end of the second pressure regulating valve 120 is connected to the second end of the packed bed heat storage tank 20, the second branch end of the second pressure regulating valve 120 is connected to the first end of the gas turbine 30, and the second end of the second pressure regulating valve 120 is connected to the buffer tank 110.
It should be noted that, the working medium pressure of the energy storage circuit needs to be within a certain preset range, and when the working medium pressure of the energy storage circuit is lower than the minimum value in the preset range, the buffer tank 110 charges the working medium into the energy storage circuit through the second pressure regulating valve 120; when the pressure of the working medium in the energy storage loop is higher than the maximum value in the preset range, the energy storage loop releases the working medium to the buffer tank 110 through the second pressure regulating valve 120, so that the pressure and the quality of the working medium in the energy storage loop can be kept balanced.
Optionally, in some embodiments, the heat exchanger 60 includes a heat exchange housing and a heat exchange pipeline, the heat exchange pipeline is a part of the pipeline of the energy storage circuit, and the heat exchange pipeline is located in the heat exchange housing, and a heat exchange medium is disposed in the heat exchange housing, and the heat exchange medium covers at least a part of the pipeline of the heat exchange pipeline.
Optionally, the heat exchange pipeline may be in a zigzag shape, and it should be understood that the purpose of the zigzag shape of the heat exchange pipeline in the heat exchanger 60 is to increase the contact area between the working medium in the heat exchange pipeline and the heat exchange medium in the heat exchanger 60, so as to further improve the heat exchange effect of the heat exchanger 60.
Optionally, in some embodiments, a solid particulate heat storage medium is disposed within the packed bed heat storage tank 20.
In the embodiment of the present application, the solid particle heat storage medium is disposed in the packed bed heat storage tank 20, and air flows into the packed bed heat storage tank 20, and gaps are formed between the solid particle heat storage medium, so that the contact area between the air and the solid particle heat storage medium is increased, and the heat exchange efficiency is improved.
Optionally, in some embodiments, a solid particulate cold storage medium is disposed within the packed bed cold storage tank 50.
In the embodiment of the present application, the solid particle cold storage medium is disposed in the packed bed cold storage tank 50, and air flows into the packed bed cold storage tank 50, and gaps are formed between the solid particle cold storage medium, so that the contact area between the air and the solid particle cold storage medium is increased, and the heat exchange efficiency is improved.
Optionally, in some embodiments, the compressor 10 and the expander 40 are coaxially connected.
In the embodiment of the present application, the compressor 10 is coaxially connected with the expander 40, that is, the compressor 10 and the expander 40 work synchronously, when the compressor 10 compresses the working medium, the working medium flows through the expander 40, and the expander 40 rotates, and because the expander 40 rotates and is coaxial with the compressor 10, the expander 40 drives the compressor 10 to rotate, thereby saving a part of the power consumption of the compressor 10.
The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210578726.8A CN117167104A (en) | 2022-05-25 | 2022-05-25 | Heat pump storage system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210578726.8A CN117167104A (en) | 2022-05-25 | 2022-05-25 | Heat pump storage system |
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| Publication Number | Publication Date |
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| CN117167104A true CN117167104A (en) | 2023-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210578726.8A Pending CN117167104A (en) | 2022-05-25 | 2022-05-25 | Heat pump storage system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106460545A (en) * | 2014-06-17 | 2017-02-22 | 西门子公司 | Gas turbine generator cooling |
| CN114458409A (en) * | 2022-03-08 | 2022-05-10 | 电力规划设计总院 | Energy storage power generation system |
| CN217152047U (en) * | 2022-05-25 | 2022-08-09 | 电力规划总院有限公司 | Heat pump electricity storage system |
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2022
- 2022-05-25 CN CN202210578726.8A patent/CN117167104A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106460545A (en) * | 2014-06-17 | 2017-02-22 | 西门子公司 | Gas turbine generator cooling |
| CN114458409A (en) * | 2022-03-08 | 2022-05-10 | 电力规划设计总院 | Energy storage power generation system |
| CN217152047U (en) * | 2022-05-25 | 2022-08-09 | 电力规划总院有限公司 | Heat pump electricity storage system |
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