Turbine power generation system with energy storage device

Abstract

The utility model provides a turbine power generation system with an energy storage device, and the system comprises a first storage cavern which is used for outputting a gaseous energy storage working medium during energy storage and inputting the gaseous energy storage working medium during energy release; the second reservoir is used for inputting a liquid energy storage working medium during energy storage and outputting the liquid energy storage working medium during energy release; the energy storage flow path comprises a first compressor, a first heat exchanger and a condenser which are sequentially connected in series, the first compressor communicates with an outlet of the first storage warehouse, and the condenser communicates with an inlet of the second storage warehouse, so that an energy storage working medium output by the first storage warehouse is sequentially compressed, cooled and liquefied, and energy storage is achieved; the energy release flow path comprises a second heat exchanger and a steam turbine which are sequentially connected in series, the second heat exchanger communicates with an outlet of the second storage cavern, and the steam turbine communicates with an inlet of the first storage cavern, so that the energy storage working medium output by the second storage cavern is sequentially gasified and expanded to drive the steam turbine to generate power to achieve energy release.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, specifically to a turbine power generation system with an energy storage device. Background Technology

[0002] Gas turbines offer advantages such as fast start-up, high power generation efficiency, and strong peak-shaving capabilities. Their large moment of inertia makes them widely used in basic power supply, peak shaving, and distributed energy, serving as a crucial support for new power systems. However, conventional gas turbines lack energy storage capabilities and cannot utilize off-peak electricity for energy storage. Utility Model Content

[0003] In view of this, this application provides a turbine power generation system with an energy storage device, which realizes energy storage during off-peak hours and energy release during peak hours, maximizing the use of off-peak electricity price benefits and reducing electricity costs.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A turbine power generation system with an energy storage device includes:

[0006] The first storage tank is used to output gaseous energy storage medium during energy storage and to input gaseous energy storage medium during energy release.

[0007] The second storage tank is used to input liquid energy storage medium during energy storage and to output liquid energy storage medium during energy release.

[0008] The energy storage flow path includes a first compressor, a first heat exchanger, and a condenser connected in series. The first compressor is connected to the outlet of the first storage tank, and the condenser is connected to the inlet of the second storage tank, so that the energy storage medium output from the first storage tank is compressed, cooled, and liquefied in sequence, and a high-energy-density energy storage medium is delivered to the second storage tank to achieve energy storage.

[0009] The energy release path includes a second heat exchanger and a steam turbine connected in series. The outlet of the second heat exchanger is connected to the outlet of the second storage tank, and the steam turbine is connected to the inlet of the first storage tank, so that the energy storage medium output from the second storage tank will be gasified and expanded in sequence to drive the steam turbine to generate electricity and release energy, while simultaneously supplying the energy storage medium to the first storage tank.

[0010] Optionally, in the above-mentioned turbine power generation system with energy storage device, the energy storage circuit further includes multiple second compressors, all of which are connected in series between the first heat exchanger and the condenser, and a third heat exchanger is connected in series between adjacent second compressors.

[0011] The second compressor and the third heat exchanger can perform multi-stage compression of the energy storage medium and cool it between each stage to improve energy storage efficiency.

[0012] Optionally, in the above-mentioned turbine power generation system with energy storage device, the second heat exchanger includes a first heat exchange pipeline, each of the third heat exchangers includes a second heat exchange pipeline, and multiple second heat exchange pipelines are connected in series.

[0013] The turbine power generation system also includes a thermal storage device, which includes a cold tank and a hot tank, and both the cold tank and the hot tank store a thermal storage medium.

[0014] The outlet of the cold tank and the inlet of the hot tank are connected by multiple second heat exchange pipelines connected in series, and the outlet of the hot tank and the inlet of the cold tank are connected by the first heat exchange pipeline. In the energy storage stage, the heat storage medium flows out of the cold tank and exchanges heat with the third heat exchanger to increase its temperature before entering the hot tank. In the energy release stage, the heat storage medium flows out of the hot tank and exchanges heat with the second heat exchanger to decrease its temperature before entering the cold tank.

[0015] Optionally, in the above-mentioned turbine power generation system with energy storage device, the current release path further includes a fourth heat exchanger, which is disposed between the second heat exchanger and the turbine to heat the energy storage working fluid.

[0016] Optionally, in the above-mentioned turbine power generation system with energy storage device, the current release path further includes a combustion chamber for heating the energy storage working fluid. The combustion chamber is located between the fourth heat exchanger and the steam turbine, and the combustion chamber is provided with a combustion gas inlet for inputting hydrogen and oxygen.

[0017] Optionally, in the above-mentioned turbine power generation system with energy storage device, the second heat exchanger includes a third heat exchange pipeline and a fourth heat exchange pipeline; the fourth heat exchanger includes a fifth heat exchange pipeline and a sixth heat exchange pipeline.

[0018] The third heat exchange pipeline is connected between the sixth heat exchange pipeline and the first storage tank;

[0019] The fourth heat exchange pipeline is connected between the second storage tank and the fifth heat exchange pipeline;

[0020] The fifth heat exchange pipeline is connected between the fourth heat exchange pipeline and the combustion chamber;

[0021] The sixth heat exchange pipeline is connected between the steam turbine and the third heat exchange pipeline;

[0022] During the energy release phase, the third heat exchange pipeline releases heat to the fourth heat exchange pipeline, and the sixth heat exchange pipeline releases heat to the fifth heat exchange pipeline, thereby achieving heat recovery and utilization.

[0023] Optionally, in the aforementioned turbine power generation system with energy storage device, the current release path further includes a third compressor, the fourth heat exchanger includes a seventh heat exchange pipeline, the seventh heat exchange pipeline is arranged opposite to the heat exchange section near the outlet of the sixth heat exchange pipeline, the inlet of the third compressor is connected to the outlet of the sixth heat exchange pipeline, the outlet of the third compressor is connected to the inlet of the seventh heat exchange pipeline, and the outlet of the seventh heat exchange pipeline is connected to the third heat exchange pipeline.

[0024] Optionally, in the aforementioned turbine power generation system with energy storage device, the current release path further includes an expander connected between the third heat exchange pipeline and the first storage tank, so as to use the energy storage working fluid to drive the expander to generate electricity.

[0025] Optionally, in the aforementioned turbine power generation system with energy storage device, the current release path further includes a dehumidifier for dehumidifying the energy storage working fluid, the dehumidifier being connected between the third heat exchange pipeline and the expander.

[0026] Optionally, in the aforementioned turbine power generation system with energy storage device, the outlet of the first storage tank is located above the liquid surface of the liquid energy storage medium, and the inlet of the first storage tank is located below the liquid surface of the liquid energy storage medium.

[0027] This application provides a turbine power generation system with an energy storage device. By setting up a second storage tank, the turbine power generation system can store energy during off-peak hours and release energy during peak hours. Specifically, during energy storage, the energy storage medium flows out of the first storage tank and sequentially passes through the first compressor, the first heat exchanger, and the condenser before entering the second storage tank. This process involves the energy storage medium output from the first storage tank being compressed, cooled, and liquefied sequentially, delivering a high-energy-density energy storage medium to the second storage tank for energy storage. During peak hours, the energy storage medium flows out of the second storage tank and sequentially passes through the second heat exchanger and the turbine before entering the first storage tank. This process involves the energy storage medium output from the second storage tank being vaporized and expanded sequentially to drive the turbine to generate electricity and release energy. This system enables energy storage during off-peak hours and energy release during peak hours, maximizing the use of off-peak electricity prices and reducing electricity costs. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0029] Figure 1 A schematic diagram of a turbine power generation system with an energy storage device provided in an embodiment of this application.

[0030] exist Figure 1 middle:

[0031] 1. First storage tank; 2. Second storage tank; 3. Current storage circuit; 4. Current release circuit; 5. Thermal storage device;

[0032] 31. First compressor; 32. First heat exchanger; 33. Condenser; 34. Second compressor; 35. Third heat exchanger;

[0033] 351. Second heat exchange pipeline;

[0034] 41. Second heat exchanger; 42. Steam turbine; 43. Fourth heat exchanger; 44. Combustion chamber; 45. Third compressor; 46. Expander; 47. Dehumidifier;

[0035] 411. First heat exchange pipeline; 412. Third heat exchange pipeline; 413. Fourth heat exchange pipeline;

[0036] 431. Fifth heat exchange pipeline; 432. Sixth heat exchange pipeline; 433. Seventh heat exchange pipeline

[0037] 51. Cold can; 52. Hot can. Detailed Implementation

[0038] This application provides a turbine power generation system with an energy storage device, which realizes energy storage during off-peak hours and energy release during peak hours, maximizing the use of off-peak electricity price benefits and reducing electricity costs.

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] like Figure 1As shown in the figure, this application provides a turbine power generation system with an energy storage device, which includes a first storage tank 1, a second storage tank 2, a storage current path 3, and a release current path 4. The first storage tank 1 stores a gaseous energy storage medium. Preferably, the first storage tank 1 stores an energy storage medium in a gas-liquid-solid mixed state. The second storage tank 2 stores a liquid energy storage medium. The storage current path 3 is used for energy storage during off-peak hours, and the release current path 4 is used for energy release during peak hours. More specifically, in the energy storage stage, the energy storage medium flows out of the first storage tank 1 and enters the storage current path 3. In the storage current path 3, the energy storage medium is pressurized by the first compressor 31, cooled by the first heat exchanger 32, and liquefied by the condenser 33 in sequence, and then transported to the second storage tank 2 as a high-energy-density energy storage medium, thereby realizing energy storage. In the energy release stage, the energy storage medium flows out of the second storage tank 2 and enters the release current path 4. In the release current path 4, the energy storage medium is heated and vaporized by the second heat exchanger 41 in sequence, and then expanded and generated by the steam turbine 42, thereby realizing energy release, and at the same time transporting the energy storage medium to the first storage tank 1.

[0041] In this application, the preferred energy storage medium is carbon dioxide; the energy storage medium stored in the second storage tank 2 is in a liquid state above the critical pressure.

[0042] Furthermore, the current storage circuit 3 also includes multiple second compressors 34, all of which are connected in series between the first heat exchanger 32 and the condenser 33. A third heat exchanger 35 is connected in series between adjacent second compressors 34 to achieve effective recovery of compression heat. The second compressors 34 and third heat exchangers 35 can perform multi-stage compression of the energy storage medium, with cooling between each stage to improve energy storage efficiency. It should be noted that the number of second compressors 34 and third heat exchangers 35 depends on the specific system configuration.

[0043] Furthermore, the second heat exchanger 41 includes a first heat exchange pipe 411, and each third heat exchanger 35 includes a second heat exchange pipe 351, with multiple second heat exchange pipes 351 connected in series. The turbine power generation system also includes a thermal storage device 5, which includes a cold tank 51 and a hot tank 52, both of which store a thermal storage medium. The outlet of the cold tank 51 is connected to the inlet of the hot tank 52 via multiple second heat exchange pipes 351 connected in series, and the outlet of the hot tank 52 is connected to the inlet of the cold tank 51 via the first heat exchange pipe 411. During the energy storage phase, the thermal storage medium flows out of the cold tank 51 and exchanges heat with the third heat exchanger 35 to increase its temperature before entering the hot tank 52. During the energy release phase, the thermal storage medium flows out of the hot tank 52 and exchanges heat with the second heat exchanger 41 to decrease its temperature before entering the cold tank 51. This saves on other heating or cooling components while achieving efficient heat utilization.

[0044] In some optional embodiments, the current release path 4 further includes a fourth heat exchanger 43, which is disposed between the second heat exchanger 41 and the turbine 42 to heat the energy storage medium, thereby improving the expansion effect of the energy storage medium and improving the power generation efficiency.

[0045] Furthermore, the current release path 4 also includes a combustion chamber 44 for heating the energy storage medium. The combustion chamber 44 is located between the fourth heat exchanger 43 and the turbine 42, and has combustion gas inlets for inputting hydrogen and oxygen. By burning hydrogen, the energy storage medium is further heated, thereby further improving power generation efficiency.

[0046] Furthermore, the second heat exchanger 41 includes a third heat exchange pipe 412 and a fourth heat exchange pipe 413; the fourth heat exchanger 43 includes a fifth heat exchange pipe 431 and a sixth heat exchange pipe 432; the third heat exchange pipe 412 is connected between the sixth heat exchange pipe 432 and the first storage tank 1; the fourth heat exchange pipe 413 is connected between the second storage tank 2 and the fifth heat exchange pipe 431; the fifth heat exchange pipe 431 is connected between the fourth heat exchange pipe 413 and the combustion chamber 44; the sixth heat exchange pipe 432... Heat exchange pipe 432 is connected between steam turbine 42 and third heat exchange pipe 412. During the energy release phase, the third heat exchange pipe 412 releases heat to the fourth heat exchange pipe 413, and the sixth heat exchange pipe 432 releases heat to the fifth heat exchange pipe 431. In this way, the heat of the energy storage medium in the current release path 4 is recovered, and the heat is then used for the energy storage medium in the current release path 4 and enters the steam turbine 42 for power generation, thereby improving the effective utilization rate of heat and the power generation efficiency.

[0047] The current release path 4 also includes a third compressor 45, and the fourth heat exchanger 43 includes a seventh heat exchange pipe 433. The seventh heat exchange pipe 433 is positioned opposite to the heat exchange section near the outlet of the sixth heat exchange pipe 432. The inlet of the third compressor 45 is connected to the outlet of the sixth heat exchange pipe 432, the outlet of the third compressor 45 is connected to the inlet of the seventh heat exchange pipe 433, and the outlet of the seventh heat exchange pipe 433 is connected to the third heat exchange pipe 412. The third compressor 45 is installed on the current release path 4 to regulate the pressure and temperature of the energy storage medium. More specifically, after the energy storage medium generates electricity through the turbine 42, its temperature and pressure decrease. By flowing through the third compressor 45 again, the energy storage medium can be recompressed to a high-pressure state, preparing for the next energy release. This cycle can be repeated multiple times to achieve efficient energy utilization.

[0048] It should be noted that the seventh heat exchange pipe 433 is located in the latter half (low temperature section) of the fourth heat exchanger 43 along the flow direction of the energy storage medium. This allows the heat of the compressed energy storage medium to be transferred to the sixth heat exchange pipe 432, so that the heat of the third compressor 45 can be effectively utilized and the energy storage efficiency can be improved.

[0049] The heat from the energy storage medium entering the combustion chamber 44 is further increased to improve power generation efficiency.

[0050] Furthermore, the current release path 4 also includes an expander 46, which is connected between the third heat exchange pipeline 412 and the first storage tank 1, so as to use the energy storage medium to drive the expander 46 to generate electricity, thereby further improving the utilization rate of the energy storage medium.

[0051] The current release path 4 also includes a dehumidifier 47 for dehumidifying the energy storage medium. The dehumidifier 47 is connected between the third heat exchange pipeline 412 and the expander 46. Hydrogen is burned in the combustion chamber 44 to produce water. The energy storage medium carries moisture, and the dehumidification of the energy storage medium before entering the expander 46 is performed to protect the expander 46 and extend its service life.

[0052] In some optional embodiments, the outlet of the first storage tank 1 is located above the liquid surface of the liquid energy storage medium, and the inlet of the first storage tank 1 is located below the liquid surface of the liquid energy storage medium. The inlet of the first storage tank 1 is used to allow the gaseous energy storage medium for expansion power generation to enter. The inlet being located below the liquid surface of the liquid energy storage medium facilitates thorough mixing with the liquid energy storage medium, thereby improving the system efficiency and reducing heat loss.

[0053] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0054] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0055] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0056] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0057] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0058] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A turbine power generation system with an energy storage device, characterized in that, include: The first storage tank (1) is used to output the gaseous energy storage medium during energy storage and to input the gaseous energy storage medium during energy release. The second storage tank (2) is used to input liquid energy storage medium during energy storage and to output liquid energy storage medium during energy release. The energy storage flow path (3) includes a first compressor (31), a first heat exchanger (32), and a condenser (33) connected in series. The outlet of the first compressor (31) is connected to the outlet of the first storage tank (1), and the inlet of the condenser (33) is connected to the inlet of the second storage tank (2), so that the energy storage medium output from the first storage tank (1) is compressed, cooled and liquefied in sequence, and a high energy density energy storage medium is delivered to the second storage tank (2) to realize energy storage. The energy release path (4) includes a second heat exchanger (41) and a steam turbine (42) connected in series. The outlet of the second heat exchanger (41) is connected to the outlet of the second storage tank (2), and the inlet of the steam turbine (42) is connected to the inlet of the first storage tank (1), so that the energy storage medium output from the second storage tank (2) is gasified and expanded in sequence to drive the steam turbine (42) to generate electricity and release energy, while simultaneously supplying the energy storage medium to the first storage tank (1).

2. The turbine power generation system with energy storage device according to claim 1, characterized in that, The current storage circuit (3) also includes multiple second compressors (34), all of which are connected in series between the first heat exchanger (32) and the condenser (33), and a third heat exchanger (35) is connected in series between adjacent second compressors (34). ； The second compressor (34) and the third heat exchanger (35) are capable of multi-stage compression of the energy storage medium and cooling between each stage to improve energy storage efficiency.

3. The turbine power generation system with energy storage device according to claim 2, characterized in that, The second heat exchanger (41) includes a first heat exchange pipe 4 (11), and each of the third heat exchangers (35) includes a second heat exchange pipe 3 (51), and multiple second heat exchange pipes (351) are connected in series; The turbine power generation system also includes a thermal storage device (5), which includes a cold tank (51) and a hot tank (52), and both the cold tank (51) and the hot tank (52) store thermal storage medium. The outlet of the cold tank (51) and the inlet of the hot tank (52) are connected by multiple second heat exchange pipes (351) connected in series, and the outlet of the hot tank (52) and the inlet of the cold tank (51) are connected by the first heat exchange pipe (411). In the energy storage stage, the heat storage medium flows out of the cold tank (51) and exchanges heat with the third heat exchanger (35) to increase its temperature before entering the hot tank (52). In the energy release stage, the heat storage medium flows out of the hot tank (52) and exchanges heat with the second heat exchanger (41) to decrease its temperature before entering the cold tank (51).

4. The turbine power generation system with energy storage device according to claim 1, characterized in that, The current release path (4) also includes a fourth heat exchanger (43), which is disposed between the second heat exchanger (41) and the steam turbine (42) to heat the energy storage medium.

5. The turbine power generation system with energy storage device according to claim 4, characterized in that, The current release path (4) also includes a combustion chamber (44) for heating the energy storage medium. The combustion chamber (44) is located between the fourth heat exchanger (43) and the steam turbine (42). The combustion chamber (44) is provided with a combustion gas inlet for inputting hydrogen and oxygen.

6. The turbine power generation system with energy storage device according to claim 5, characterized in that, The second heat exchanger (41) includes a third heat exchange pipe (412) and a fourth heat exchange pipe (413); the fourth heat exchanger (43) includes a fifth heat exchange pipe (431) and a sixth heat exchange pipe (432); The third heat exchange pipeline (412) is connected between the sixth heat exchange pipeline (432) and the first storage tank (1); The fourth heat exchange pipeline (413) is connected between the second storage tank (2) and the fifth heat exchange pipeline (431); The fifth heat exchange pipe (431) is connected between the fourth heat exchange pipe (413) and the combustion chamber (44); The sixth heat exchange pipeline (432) is connected between the steam turbine (42) and the third heat exchange pipeline (412); During the energy release phase, the third heat exchange pipeline (412) releases heat to the fourth heat exchange pipeline (413), and the sixth heat exchange pipeline (432) releases heat to the fifth heat exchange pipeline (431) to achieve heat recovery and utilization.

7. The turbine power generation system with energy storage device according to claim 6, characterized in that, The current release path (4) further includes a third compressor (45), and the fourth heat exchanger (43) includes a seventh heat exchange pipeline (433). The seventh heat exchange pipeline (433) is arranged opposite to the heat exchange section near the outlet of the sixth heat exchange pipeline (432). The inlet of the third compressor (45) is connected to the outlet of the sixth heat exchange pipeline (432), the outlet of the third compressor (45) is connected to the inlet of the seventh heat exchange pipeline (433), and the outlet of the seventh heat exchange pipeline (433) is connected to the third heat exchange pipeline (412).

8. The turbine power generation system with energy storage device according to claim 6, characterized in that, The current release path (4) also includes an expander (46), which is connected between the third heat exchange pipeline (412) and the first storage tank (1) to drive the expander (46) to generate electricity using the energy storage working fluid.

9. The turbine power generation system with energy storage device according to claim 8, characterized in that, The current release path (4) also includes a dehumidifier (47) for dehumidifying the energy storage medium, the dehumidifier (47) being connected between the third heat exchange pipeline (412) and the expander (46).

10. The turbine power generation system with energy storage device according to any one of claims 1-9, characterized in that, The outlet of the first storage tank (1) is located above the liquid surface of the liquid energy storage medium, and the inlet of the first storage tank (1) is located below the liquid surface of the liquid energy storage medium.

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