CN220911710U - Energy storage system of clean energy of well deep geothermal energy coupling - Google Patents
Energy storage system of clean energy of well deep geothermal energy coupling Download PDFInfo
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Abstract
The utility model relates to the technical field of geothermal energy storage, in particular to an energy storage system for coupling medium-deep geothermal energy with clean energy. Comprising the following steps: the device comprises a first extraction unit, a second extraction unit, a first heat source heat exchanger, a second heat source heat exchanger and an energy storage unit; the first extraction unit is connected with a heat supply channel of the first heat source heat exchanger; the second extraction unit is connected with a heat supply channel of the second heat source heat exchanger; the energy storage unit includes: the heat collecting device comprises a first heat storage unit, a first heat exchanger and a second heat exchanger, wherein the heat collecting channels of the first heat storage unit and the first heat exchanger are connected in an annular mode; the heat-taking channel of the first heat source heat exchanger is connected with the heat-supplying channel of the first heat exchanger; the heat taking channel of the second heat source heat exchanger is connected with the heat supply channel of the second heat exchanger. The utility model aims to solve the problem that the prior art is difficult to couple the middle-deep geothermal energy with other energy sources, so that the energy storage efficiency is low.
Description
Technical Field
The utility model relates to the technical field of geothermal energy storage, in particular to an energy storage system for coupling medium-deep geothermal energy with clean energy.
Background
The development and heat utilization of the geothermal energy in the middle and deep layers refer to the process of taking out the high-temperature energy existing in the deep zone from the geothermal storage layer and lifting the high-temperature energy to the ground through geological exploration drilling, and the technology of energy storage is often needed in the development process. The energy storage process comprises three steps of energy charging, energy storage and energy discharging, and when the energy is stored in the form of electric energy or other energy and is recovered to be released in the energy discharging process, the storage is called electric energy storage; when energy is recovered in the form of heat or cold, such storage is referred to as thermal energy storage. Electrical energy storage technologies can be divided into Mechanical Energy Storage (MES), chemical Energy Storage (CES), electrochemical energy storage, and Superconducting Magnetic Energy Storage (SMES); thermal energy storage technologies can be categorized into sensible heat storage, latent heat storage and thermochemical storage. In mechanical energy storage, electric energy is converted into more easily stored energy through electromechanics, and technologies of the mechanical energy storage include pumped storage, compressed air energy storage, gravity Energy Storage (GES), flywheel Energy Storage (FES) and the like. Chemical energy storage is achieved by producing compounds which are easier to store through electric energy, and comprises the category of chemical energy storage such as hydrogen, methane, ethanol and the like. Super capacitor and battery technology then belong to the category of electrochemical energy storage.
Geothermal energy is taken as renewable energy, can be stably mined for 24 hours without day and night, does not need to consume underground fossil fuel, and is considered as renewable clean energy which is used semi-permanently and stably. In practical applications, other clean energy is often required as a supplementary energy, and it is difficult to couple the geothermal energy of the middle-deep layer with the clean energy, resulting in low energy storage efficiency. How to combine the input and output of the middle-deep geothermal energy with various primary energy sources such as light energy, wind energy or other geothermal energy and secondary energy sources mainly including electric energy, and realize the efficient utilization of the energy sources through reasonable system regulation and control, and the method greatly reduces the carbon emission brought by the system while realizing the best economic benefit of the whole life cycle, thus being a key problem to be solved in the development and utilization of the middle-deep geothermal energy.
Disclosure of utility model
The utility model provides an energy storage system for coupling medium-deep geothermal energy with clean energy, which is used for solving the problem that the energy storage efficiency is low because the medium-deep geothermal energy is difficult to couple with the clean energy in the prior art.
The utility model provides an energy storage system for coupling medium-deep geothermal energy with clean energy, which comprises:
The device comprises a first extraction unit for extracting middle-deep geothermal energy, a second extraction unit for extracting heat energy of clean energy, a first heat source heat exchanger, a second heat source heat exchanger and an energy storage unit;
The first extraction unit is connected with a heat supply channel of the first heat source heat exchanger;
the second extraction unit is connected with a heat supply channel of the second heat source heat exchanger;
The energy storage unit includes: the heat collecting device comprises a first heat storage unit, a first heat exchanger and a second heat exchanger, wherein the heat collecting channels of the first heat storage unit and the first heat exchanger are connected in an annular mode;
The heat-taking channel of the first heat source heat exchanger is connected with the heat-supplying channel of the first heat exchanger;
the heat taking channel of the second heat source heat exchanger is connected with the heat supply channel of the second heat exchanger.
According to the energy storage system for coupling the medium-deep geothermal energy to the clean energy, the first extraction unit comprises: a geothermal well unit and a ground source heat pump for extracting middle-deep geothermal energy;
The geothermal well unit, the ground source heat pump and the heat supply channel of the first heat source heat exchanger are connected in an annular mode.
According to the utility model, the energy storage system for coupling the medium-deep geothermal energy to clean energy is provided, and the geothermal well unit comprises: at least one mid-deep geothermal ground pipe;
The medium-deep geothermal buried pipe, the ground source heat pump and the heat supply channel of the first heat source heat exchanger are connected in an annular mode.
According to the energy storage system for coupling the medium-deep geothermal energy to the clean energy, the second extraction unit comprises: and the heat source receiving unit is used for acquiring heat energy of clean energy and is connected with the heat supply channel of the second heat source heat exchanger.
According to the energy storage system for coupling the medium-deep geothermal energy with the clean energy, the energy storage unit further comprises: a second heat storage unit and a third heat exchanger;
The second heat storage unit is connected with a heat taking channel of the third heat exchanger;
And the heating channel of the third heat exchanger is connected with the output end of the heating channel of the first heat exchanger.
The energy storage system for coupling the medium-deep geothermal energy with the clean energy provided by the utility model further comprises a compressor;
The input end of the compressor is connected with the heat taking channel of the first heat source heat exchanger, and the output end of the compressor is connected with the heat supplying channel of the first heat source heat exchanger.
The utility model provides an energy storage system for coupling medium-deep geothermal energy with clean energy, which further comprises a circulating heat exchanger, a first turbine, an energy storage heat exchanger and a cold storage tank;
the heat supply channel of the circulating heat exchanger is connected with the heat supply channel of the third heat exchanger;
The first turbine is positioned between the circulating heat exchanger and the energy storage heat exchanger, the input end of the first turbine is connected with the heat supply channel of the circulating heat exchanger, and the output end of the first turbine is connected with the heat supply channel of the energy storage heat exchanger;
the heat supply channel of the energy storage heat exchanger is connected with the heat taking channel of the circulating heat exchanger;
The cold storage tank is connected with the heat taking channel of the energy storage heat exchanger.
The energy storage system for coupling the medium-deep geothermal energy with the clean energy provided by the utility model further comprises a fourth heat exchanger, a second turbine, a storage Leng Huanre and a first booster pump;
The heat supply channel of the fourth heat exchanger is connected with the second heat storage unit, the input end of the second turbine is connected with the heat taking channel of the fourth heat exchanger, the output end of the second turbine is connected with the cold taking channel of the storage Leng Huanre, the cold supply channel of the storage Leng Huanre is connected with the cold storage tank, the input end of the first booster pump is connected with the cold supply channel of the storage Leng Huanre, and the output end of the first booster pump is connected with the heat taking channel of the fourth heat exchanger.
The energy storage system for coupling the middle-deep geothermal energy with the clean energy provided by the utility model further comprises a third turbine, a cold transfer device, a second booster pump and a cooling tower;
the input end of the third turbine is connected with the heat supply channel of the second heat exchanger, the output end of the third turbine is connected with the cooling channel of the cold transfer device, the cooling channel of the cold transfer device is connected with the cooling tower, the input end of the second booster pump is connected with the cooling channel of the cold transfer device, and the output end of the second booster pump is communicated with the heat taking channel of the second heat source heat exchanger.
According to the energy storage system for coupling the medium-deep geothermal energy to the clean energy, the first heat storage unit and the second heat storage unit comprise a first-stage heat storage tank and a second-stage heat storage tank, and the first-stage heat storage tank and the second-stage heat storage tank are respectively arranged on two sides of the first heat exchanger heat taking channel or on two sides of the third heat exchanger heat taking channel.
According to the energy storage system for coupling the middle-deep geothermal energy with the clean energy, the middle-deep geothermal energy is extracted through the first extraction unit, the second extraction unit extracts the thermal energy of the clean energy, and the middle-deep geothermal energy is subjected to heat exchange into the heat taking channel of the first heat source heat exchanger through the heat supply channel of the first heat source heat exchanger, so that the thermal energy in the heat supply channel of the first heat exchanger is subjected to heat exchange into the heat taking channel of the first heat exchanger, and the first heat storage unit stores the geothermal energy; meanwhile, heat energy of clean energy is subjected to heat exchange to a heat taking channel of the second heat source heat exchanger through a heat supply channel of the second heat source heat exchanger, so that after the heat energy is obtained by the heat supply channel of the second heat source heat exchanger, heat is transferred to the heat taking channel of the second heat exchanger, the first heat storage unit is used for storing the heat energy, the medium-deep geothermal energy is coupled with other energy sources, and the energy storage efficiency is improved.
Drawings
In order to more clearly illustrate the utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of an energy storage system for coupling medium-deep geothermal energy to clean energy.
Fig. 2 is a schematic structural diagram of a second embodiment of the energy storage system for coupling medium-deep geothermal energy to clean energy.
Reference numerals:
The first extraction unit 100, the geothermal well unit 110, the ground source heat pump 120, the second extraction unit 200, the heat source receiving unit 210, the first heat source heat exchanger 300, the second heat source heat exchanger 400, the energy storage unit 500, the first heat storage unit 510, the first heat storage tank 511, the second heat storage tank 512, the first heat exchanger 520, the second heat exchanger 530, the second heat storage unit 540, the third heat exchanger 550, the compressor 610, the circulation heat exchanger 620, the first turbine 630, the energy storage heat exchanger 640, the cold storage tank 650, the fourth heat exchanger 660, the second turbine 710, the energy storage Leng Huanre, the first booster pump 730, the third turbine 810, the cold transfer 820, the second booster pump 830, and the cooling tower 840.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
An energy storage system of the present utility model for coupling medium-deep geothermal energy to clean energy is described below with reference to fig. 1, comprising: the apparatus includes a first extraction unit 100 for extracting middle-deep geothermal energy, a second extraction unit 200 for extracting thermal energy of clean energy, a first heat source heat exchanger 300, a second heat source heat exchanger 400, and an energy storage unit 500. Specifically, the medium for transferring heat energy in the heat supply channels of the first extraction unit 100 and the first heat source heat exchanger 300 is heat transfer oil. Meanwhile, the medium for heat transfer in the heat supply channel of the second heat source heat exchanger 400 is R141b heat transfer oil. The first extraction unit 100 converts the extracted geothermal energy into the thermal energy of the high-temperature heat transfer oil and then transfers the thermal energy to the heat supply path of the first heat source heat exchanger 300. The second extraction unit 200 converts heat energy extracted from clean energy into gaseous R141b heat transfer oil in a high temperature and high pressure state and then transfers the heat transfer oil to the second heat source heat exchanger 400. In this embodiment, the second extracting unit 200 includes: and a heat source receiving unit 210 for acquiring heat energy of the clean energy, the heat source receiving unit being connected to the heat supply passage of the second heat source heat exchanger. Wherein the clean energy source comprises wind energy, electric energy, solar energy and geothermal energy.
The first extraction unit 100 is connected to a heat supply passage of the first heat source heat exchanger 300.
The second extraction unit 200 is connected to a heat supply passage of the second heat source heat exchanger 400.
The energy storage unit 500 includes: the heat storage device comprises a first heat storage unit 510, a first heat exchanger 520 and a second heat exchanger 530, wherein the heat taking channels of the first heat storage unit 510, the first heat exchanger 520 and the second heat exchanger 530 are connected in an annular mode. Specifically, taking counter-clockwise flow as an example, the output end of the first heat storage unit 510 is connected to the input end of the heat taking channel of the first heat exchanger 520, the output end of the heat taking channel of the first heat exchanger 520 is connected to the input end of the heat taking channel of the second heat exchanger 530, and the output end of the heat taking channel of the second heat exchanger 530 is connected to the input end of the first heat storage unit 510, so that the first heat storage unit 510, the heat taking channel of the first heat exchanger 520 and the heat taking channel of the second heat exchanger 530 form an annular passage.
The heat-taking channel of the first heat source heat exchanger 300 is connected with the heat-supplying channel of the first heat exchanger 520.
The heat-taking channel of the second heat source heat exchanger 400 is connected with the heat-supplying channel of the second heat exchanger 530.
The medium flowing in the heat supply channel of the first heat exchanger 520 and the heat taking channel of the first heat source heat exchanger 300 is carbon dioxide, the carbon dioxide is heated to supercritical carbon dioxide with high temperature and high pressure through the heat energy carried by the high temperature heat conducting oil in the heat supply channel of the first heat source heat exchanger 300, and then the heat energy is transferred to the first heat storage unit 510 for storage through the first heat exchanger 520.
The utility model extracts the middle-deep geothermal energy through the first extraction unit 100, the second extraction unit 200 extracts the heat energy of clean energy, the middle-deep geothermal energy is heat exchanged into the heat taking channel of the first heat source heat exchanger 300 through the heat supplying channel of the first heat source heat exchanger 300, so that the heat energy in the heat supplying channel of the first heat exchanger 520 is heat exchanged into the heat taking channel of the first heat exchanger 520, and the first heat storage unit 510 stores the geothermal energy; meanwhile, the heat energy of the clean energy is heat-exchanged to the heat-taking channel of the second heat source heat exchanger 400 through the heat-supplying channel of the second heat source heat exchanger 400, so that after the heat-supplying channel of the second heat exchanger 530 obtains the heat energy, the heat is transferred to the heat-taking channel of the second heat exchanger 530, thereby realizing that the first heat storage unit 510 stores the heat energy, realizing that the middle-deep geothermal energy is coupled with other energy, and further improving the storage efficiency of the energy.
Example two
On the basis of the above embodiments, referring to fig. 2, the first extracting unit 100 includes: a geothermal well unit 110 for extracting mid-deep geothermal energy and a ground source heat pump 120. The ground source heat pump 120 comprises one or more efficient heat pump units, converts the geothermal energy of the middle-deep layer into the thermal energy of the high-temperature heat conduction oil, and the output thermal energy temperature is about 150 ℃.
The geothermal well unit 110, the ground source heat pump 120 and the heat supply channel of the first heat source heat exchanger 300 are connected in a ring shape.
Specifically, the geothermal well unit 110 includes: at least one mid-deep geothermal ground pipe. Such as one mid-deep geothermal ground pipe or three mid-deep geothermal ground pipes. The depth of each middle-deep geothermal buried pipe is about 3 km; on the basis of not exploiting underground water, the middle-deep geothermal buried pipe adopts an indirect heat exchange mode to extract underground middle-deep geothermal energy. Taking a geothermal well with a depth of 3km as an example, the bottom hole temperature of the geothermal well with a depth of 3km can reach about 100 ℃.
The middle-deep geothermal buried pipe, the ground source heat pump 120 and the heat supply channel of the first heat source heat exchanger 300 are connected in a ring shape. The medium-deep geothermal buried pipe converts the extracted geothermal energy into the thermal energy of high-temperature heat conduction oil and transmits the thermal energy to the ground source heat pump 120, and the ground source heat pump 120 transmits the high-temperature heat conduction oil to the heat supply channel of the first heat source heat exchanger 300 so as to transfer the geothermal energy to the first heat exchanger 520.
On the basis of the above embodiments, the energy storage unit 500 further includes: a second heat storage unit 540 and a third heat exchanger 550.
The second heat storage unit 540 is connected to the heat extraction channel of the third heat exchanger 550.
The heat supply channel of the third heat exchanger 550 is connected to the output end of the heat supply channel of the first heat exchanger 520. Specifically, the second heat storage unit 540 is a low temperature heat storage unit, and the heat exchanged by the first heat exchanger 520 is exchanged again by the third heat exchanger 550, and then the exchanged heat is transferred to the second heat storage unit 540 for storage.
On the basis of the above embodiment, the present utility model further includes a compressor 610.
The input end of the compressor 610 is connected to the heat-taking channel of the first heat source heat exchanger 300, and the output end of the compressor 610 is connected to the heat-supplying channel of the first heat source heat exchanger. The carbon dioxide in the heat-taking channel of the first heat source heat exchanger 300 is heated to a medium temperature and low pressure state by geothermal energy, then compressed and consumed by the compressor 610 to become high temperature and high pressure supercritical carbon dioxide, and the high temperature and supercritical pressure carbon dioxide transfers the self-generated heat energy to the first heat storage unit 510 and the second heat storage unit 540 through the two heat exchangers (the first heat exchanger 520 and the third heat exchanger 550) respectively, and finally becomes the carbon dioxide in the normal temperature and high pressure state again, and then enters the heat-taking channel of the first heat source heat exchanger 300 again.
On the basis of the above embodiment, the present utility model further includes a circulating heat exchanger 620, a first turbine 630, an energy storage heat exchanger 640, and a cold storage tank 650.
The heat supply channel of the circulation heat exchanger 620 is connected to the heat supply channel of the third heat exchanger 550.
The first turbine 630 is located between the circulating heat exchanger 620 and the energy storage heat exchanger 640, the input end of the first turbine 630 is connected with the heat supply channel of the circulating heat exchanger 620, and the output end of the first turbine 630 is connected with the heat supply channel of the energy storage heat exchanger 640.
The heat supply channel of the energy storage heat exchanger 640 is connected to the heat extraction channel of the circulating heat exchanger 620.
The cold storage tank 650 is connected to the heat-taking channel of the energy storage heat exchanger 640. Specifically, the cold storage tank 650 selects a cold storage mode of ice slurry; the cold storage tank 650 serves as a cold source to condense gaseous carbon dioxide into a liquid.
In this embodiment, the carbon dioxide at normal temperature and high pressure is expanded by the first turbine 630 to perform power generation, and is changed into carbon dioxide liquid at low temperature and 3500kPa, the carbon dioxide which is changed into liquid provides its own cooling capacity to the cooling tank 650 by the energy storage heat exchanger 640, and the carbon dioxide gas which is changed into carbon dioxide gas at 25 ℃ and 3500kPa by heat recovery is re-introduced into the heat extraction channel of the first heat source heat exchanger 300.
On the basis of the above embodiment, the present utility model further includes a fourth heat exchanger 660, a second turbine 710, a reservoir Leng Huanre, 720, and a first booster pump 730.
The heat supply channel of the fourth heat exchanger 660 is connected with the second heat storage unit 540, the input end of the second turbine 710 is connected with the heat taking channel of the fourth heat exchanger 660, the output end of the second turbine 710 is connected with the cooling channel of the storage Leng Huanre, the cooling channel of the storage Leng Huanre is connected with the cooling tank 650, the input end of the first booster pump 730 is connected with the cooling channel of the storage Leng Huanre, and the output end of the first booster pump 730 is connected with the heat taking channel of the fourth heat exchanger 660.
On the basis of the above embodiment, a third turbine 810, a cold transfer 820, a second booster pump 830, and a cooling tower 840 are further included. Wherein, the cold transfer device 820 comprises a fixed plate shell-and-tube heat exchanger, and adopts water cooling.
The input end of the third turbine 810 is connected to the heat supply channel of the second heat exchanger 530, the output end of the third turbine 810 is connected to the cooling channel of the cold transfer device 820, the cooling channel of the cold transfer device 820 is connected to the cooling tower 840, the input end of the second booster pump 830 is connected to the cooling channel of the cold transfer device 820, and the output end of the second booster pump 830 is communicated to the heat collection channel of the second heat source heat exchanger 400. The first turbine 630, the second turbine 710 and the third turbine 810 all comprise a turbine generator set.
In this embodiment, the gaseous R141b heat-conducting oil in a high temperature and high pressure state flowing out of the heat supply channel of the second heat exchanger 530 is expanded by the turbine set (the third turbine 810) to perform power generation, the R141b heat-conducting oil is changed into normal temperature and normal pressure gas, and is output to the outside through the cold transmitter 820, the R141b heat-conducting oil is condensed into liquid, and then is pressurized into normal temperature and high pressure liquid by the centrifugal pump to enter the heat-taking channel of the second heat source heat exchanger 400.
The first heat storage unit 510 and the second heat storage unit 540 each include a primary heat storage tank 511 and a secondary heat storage tank 512, where the primary heat storage tank 511 and the secondary heat storage tank 512 are respectively disposed on two sides of the heat taking channel of the first heat exchanger 520 or on two sides of the heat taking channel of the third heat exchanger 550. Specifically, taking counter-clockwise flow as an example, the output end of the first heat storage tank 511 is connected to the input end of the heat taking channel of the first heat exchanger 520, the output end of the heat taking channel of the first heat exchanger 520 is connected to the input end of the second heat storage tank 512, the output end of the second heat storage tank 512 is connected to the input end of the heat taking channel of the second heat exchanger 530, and the output end of the heat taking channel of the second heat exchanger 530 is connected to the input end of the first heat storage tank 511, so that the first heat storage tank 511, the second heat storage tank 512, the heat taking channel of the first heat exchanger 520 and the heat taking channel of the second heat exchanger 530 form an annular passage. Better storage of energy is enabled by the primary and secondary heat storage tanks 511, 512.
The energy charging process of the utility model comprises the following steps: the charge cycle is operated (the first extraction unit 100, the second extraction unit 200, the first heat source heat exchanger 300, the compressor 610, the circulation heat exchanger 620, the first turbine 630, the energy storage heat exchanger 640, the cold storage tank 650, the second heat source heat exchanger 400, the energy storage unit 500, the third turbine 810, the cold transfer 820, the second booster pump 830, and the cooling tower 840 are operated). The energy release cycle is not operated (the fourth heat exchanger 660, the second turbine 710, the reservoir Leng Huanre, 720, and the first booster pump 730 are not operated), and the charge cycle is used as a regenerative cycle, which is a carbon dioxide transcritical rankine cycle. In operation, carbon dioxide gas in a state of 25 ℃ and 3500kPa is heated to a state of medium temperature and low pressure by thermal energy in the heat supply path of the first heat source heat exchanger 300, and then compressed and consumed by the compressor 610 to become high temperature and high pressure supercritical carbon dioxide. The carbon dioxide at the high temperature and the supercritical pressure transfers the self-generated heat energy to the first heat storage unit 510 and the first heat storage unit 510 through the two heat exchangers (the first heat exchanger 520 and the third heat exchanger 550), and then returns to the normal temperature and high pressure state through the primary circulation heat exchanger 620. The carbon dioxide at normal temperature and high pressure is expanded and acted by the first turbine 630 to generate power, becomes carbon dioxide liquid at low temperature and 3500kPa, the carbon dioxide which becomes liquid provides own cold energy to the cold storage tank 650 through the energy storage heat exchanger 640, and returns carbon dioxide gas which is thermally changed into 25 ℃ and 3500kPa through the circulating heat exchanger 620.
The energy release process comprises the following steps: the energy release cycle is operated (the energy storage unit 500, the fourth heat exchanger 660, the second turbine 710, the storage Leng Huanre, the first booster pump 730, the cold storage tank 650, the third turbine 810, the cold transfer 820, the second booster pump 830, and the cooling tower 840 are operated). The charging cycle is not operated (the first extraction unit 100, the second extraction unit 200, the first heat source heat exchanger 300, the compressor 610, the circulation heat exchanger 620, the first turbine 630, the energy storage heat exchanger 640, the second heat source heat exchanger 400 are not operated). The first heat storage unit 510 and/or the second heat storage unit 540 in the energy storage unit 500 release heat energy, and the liquid R141b heat transfer oil at normal temperature and high pressure in the pipe connected to the first heat storage unit 510 and the second heat storage unit 540 is heated to become high temperature and high pressure gas. The gaseous R141b heat transfer oil in the high temperature and high pressure state is expanded by the corresponding expander (the second expander or the third turbine 810) to do work and generate power to the outside, and is changed into normal temperature and pressure gas, which is condensed into liquid by the heat exchanger (the cold transfer device 820 or the cold storage heat exchanger 720), and is pressurized into normal temperature and high pressure liquid by the centrifugal pump (the first pressurizing pump 730 or the second pressurizing pump 830). The first heat exchanger 520 and the third heat exchanger 550 can discharge excessive heat and cold generated by operation to achieve maintenance of normal circulation of the system.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.
Claims (10)
1. An energy storage system for coupling medium-deep geothermal energy to clean energy, comprising:
The device comprises a first extraction unit for extracting middle-deep geothermal energy, a second extraction unit for extracting heat energy of clean energy, a first heat source heat exchanger, a second heat source heat exchanger and an energy storage unit;
The first extraction unit is connected with a heat supply channel of the first heat source heat exchanger;
the second extraction unit is connected with a heat supply channel of the second heat source heat exchanger;
The energy storage unit includes: the heat collecting device comprises a first heat storage unit, a first heat exchanger and a second heat exchanger, wherein the heat collecting channels of the first heat storage unit and the first heat exchanger are connected in an annular mode;
The heat-taking channel of the first heat source heat exchanger is connected with the heat-supplying channel of the first heat exchanger;
the heat taking channel of the second heat source heat exchanger is connected with the heat supply channel of the second heat exchanger.
2. The energy storage system of claim 1, wherein the first extraction unit comprises: a geothermal well unit and a ground source heat pump for extracting middle-deep geothermal energy;
The geothermal well unit, the ground source heat pump and the heat supply channel of the first heat source heat exchanger are connected in an annular mode.
3. The energy storage system of claim 2, wherein the geothermal well unit comprises: at least one mid-deep geothermal ground pipe;
The medium-deep geothermal buried pipe, the ground source heat pump and the heat supply channel of the first heat source heat exchanger are connected in an annular mode.
4. The energy storage system of claim 1, wherein the second extraction unit comprises: and the heat source receiving unit is used for acquiring heat energy of clean energy and is connected with the heat supply channel of the second heat source heat exchanger.
5. The energy storage system of claim 1, wherein the energy storage unit further comprises: a second heat storage unit and a third heat exchanger;
The second heat storage unit is connected with a heat taking channel of the third heat exchanger;
And the heating channel of the third heat exchanger is connected with the output end of the heating channel of the first heat exchanger.
6. The energy storage system of claim 1, further comprising a compressor;
The input end of the compressor is connected with the heat taking channel of the first heat source heat exchanger, and the output end of the compressor is connected with the heat supplying channel of the first heat source heat exchanger.
7. The energy storage system of claim 5, further comprising a circulating heat exchanger, a first turbine, an energy storage heat exchanger, and a cold storage tank;
the heat supply channel of the circulating heat exchanger is connected with the heat supply channel of the third heat exchanger;
The first turbine is positioned between the circulating heat exchanger and the energy storage heat exchanger, the input end of the first turbine is connected with the heat supply channel of the circulating heat exchanger, and the output end of the first turbine is connected with the heat supply channel of the energy storage heat exchanger;
the heat supply channel of the energy storage heat exchanger is connected with the heat taking channel of the circulating heat exchanger;
The cold storage tank is connected with the heat taking channel of the energy storage heat exchanger.
8. The energy storage system of claim 7, further comprising a fourth heat exchanger, a second turbine, a reservoir Leng Huanre, and a first booster pump;
The heat supply channel of the fourth heat exchanger is connected with the second heat storage unit, the input end of the second turbine is connected with the heat taking channel of the fourth heat exchanger, the output end of the second turbine is connected with the cold taking channel of the storage Leng Huanre, the cold supply channel of the storage Leng Huanre is connected with the cold storage tank, the input end of the first booster pump is connected with the cold supply channel of the storage Leng Huanre, and the output end of the first booster pump is connected with the heat taking channel of the fourth heat exchanger.
9. The energy storage system of any one of claims 1 to 8, further comprising a third turbine, a cold transfer, a second booster pump, and a cooling tower;
the input end of the third turbine is connected with the heat supply channel of the second heat exchanger, the output end of the third turbine is connected with the cooling channel of the cold transfer device, the cooling channel of the cold transfer device is connected with the cooling tower, the input end of the second booster pump is connected with the cooling channel of the cold transfer device, and the output end of the second booster pump is communicated with the heat taking channel of the second heat source heat exchanger.
10. The energy storage system of claim 5, wherein the first and second heat storage units each comprise a primary heat storage tank and a secondary heat storage tank, the primary and secondary heat storage tanks being disposed on two sides of the first heat exchanger heat extraction channel or on two sides of the third heat exchanger heat extraction channel, respectively.
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