CN111750405A - Enhancement mode geothermal heating system - Google Patents
Enhancement mode geothermal heating system Download PDFInfo
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- CN111750405A CN111750405A CN202010473059.8A CN202010473059A CN111750405A CN 111750405 A CN111750405 A CN 111750405A CN 202010473059 A CN202010473059 A CN 202010473059A CN 111750405 A CN111750405 A CN 111750405A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000001914 filtration Methods 0.000 claims abstract description 52
- 230000007246 mechanism Effects 0.000 claims abstract description 37
- 239000012535 impurity Substances 0.000 claims description 14
- 238000000746 purification Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 3
- 238000011084 recovery Methods 0.000 abstract description 8
- 230000008859 change Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 description 7
- 239000008213 purified water Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003809 water extraction Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
- B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/12—Devices for taking out of action one or more units of multi- unit filters, e.g. for regeneration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/20—Geothermal collectors using underground water as working fluid; using working fluid injected directly into the ground, e.g. using injection wells and recovery wells
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/11—Geothermal energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Filtration Of Liquid (AREA)
Abstract
The invention discloses an enhanced geothermal heating system, and relates to the technical field of geothermal heating. The heat exchange mechanism is communicated with the filtering mechanism and comprises a water recovery well, a connecting pipe, a plate heat exchanger and a recharge well, a conveying pipe is arranged inside the water recovery well, the filtering mechanism comprises a first three-way pipe and a second three-way pipe, and the first three-way pipe is fixedly arranged at one end, far away from the water recovery well, of the conveying pipe. Through setting up heat transfer mechanism and filtering mechanism, when needing to be changed the filter cartridge, close the inside valve of first filter tube earlier, can change the filter cartridge corresponding with first filter tube, do not influence the second filter tube simultaneously and to geothermal water's transport, solve conventional filter equipment and be not convenient for change the filter core, reduced geothermal heat supply efficiency's problem, the device operation mode is simple and guaranteed geothermal heat supply efficiency, has increased the device's usability.
Description
Technical Field
The invention relates to the technical field of geothermal heating, in particular to an enhanced geothermal heating system.
Background
Geothermal water is ground water at a temperature significantly higher than the average temperature of the local year, or higher than the temperature of surrounding rock at the depth of observation. Geothermal water is a precious natural resource, not only can provide pollution-free heat energy for human beings, but also can be used as a water supply source or mineral resources for development and utilization, has important significance for the development of national economy, utilizes geothermal power generation and urban central heating using geothermal water as a heat source, and has the advantages of saving mineral fuel and not causing urban atmosphere compared with other energy sources:
among the prior art, geothermal water gets into the heat exchanger and causes heat exchanger life to reduce easily without filtering, and conventional filter equipment structure is fairly simple for the filter core is changed to not good and be not convenient for of filter effect, has reduced geothermal heat supply efficiency.
Disclosure of Invention
The invention provides an enhanced geothermal heating system which has the advantages of filtering geothermal water, facilitating replacement of a filter element and ensuring geothermal heating efficiency, and solves the problems that a conventional filtering device is simple in structure, poor in filtering effect, inconvenient to replace the filter element and low in geothermal heating efficiency.
In order to realize the purposes of filtering geothermal water, facilitating the replacement of a filter core and ensuring the geothermal heat supply efficiency, the invention provides the following technical scheme: the enhanced geothermal heating system comprises a heat exchange mechanism and a filtering mechanism, wherein the heat exchange mechanism is communicated with the filtering mechanism and comprises a water recovery well, a connecting pipe, a plate heat exchanger and a recharge well, and a conveying pipe is arranged in the water recovery well;
the filter mechanism comprises a first three-way pipe and a second three-way pipe, wherein a first three-way pipe is fixedly arranged at one end, away from the water extraction well, of the conveying pipe, a first filter pipe and a second filter pipe are fixedly arranged at two ends, away from the conveying pipe, of the first three-way pipe respectively, a filter box is fixedly arranged at one end, away from the first three-way pipe, of the first filter pipe and one end, away from the second three-way pipe, of the first filter pipe, a first filter screen, a second filter screen and a third filter screen are sequentially and movably arranged in the filter box from left to right, a water purification pipe is fixedly arranged on one side of the filter box, and one end, away from the filter box, of the water purification pipe is.
As a preferable technical scheme of the invention, a valve is arranged inside the conveying pipe, and a one-way valve is arranged inside the water purifying pipe.
As a preferable technical scheme of the invention, one ends of the two water purifying pipes far away from the filter box are respectively and fixedly connected with two ends of a second three-way pipe, and one end of the second three-way pipe far away from the water purifying pipes is fixedly provided with a connecting pipe.
As a preferable technical scheme of the invention, one end of the connecting pipe, which is far away from the second three-way pipe, is communicated with the recharge well through a plate heat exchanger.
As a preferred technical scheme of the present invention, one side of the inner wall of the filter box is provided with an impurity groove, the top surface and the bottom surface of the inner wall of the filter box are both fixedly provided with a clamping seat, and two ends of the first filter screen, the second filter screen and the third filter screen respectively extend to the inside of the clamping seat.
As a preferable technical scheme of the invention, one side of the filter box is fixedly provided with a hasp, one side of the cover plate is fixedly provided with a hasp matched with the hasp, and the hasp is overlapped with the hasp.
Compared with the prior art, the invention provides an enhanced geothermal heating system, which has the following beneficial effects:
1. this geothermal heating system of enhancement mode, through setting up heat transfer mechanism and filtering mechanism, when needing to be changed the filter cartridge, will close the inside valve of first filter tube earlier, can change the filter cartridge corresponding with first filter tube, do not influence the second simultaneously and filter the pipe and to geothermal water's transport, solve conventional filter equipment and be not convenient for change the filter core, reduced geothermal heating efficiency's problem, the device operation is simple and guaranteed geothermal heating efficiency, the usability of the device has been increased.
2. This geothermal heating system of enhancement mode, through setting up heat transfer mechanism and filtering mechanism, the large granule impurity of first filter screen in to geothermal water carries out preliminary interception, geothermal water after the preliminary filtration is in the filtration through second filter screen and third filter screen, make impurity in geothermal water by effective filtration, it is fairly simple to solve conventional filter equipment structure, make the not good problem of filter effect, geothermal water after the filtration recharges to the inside of recharging well again after plate heat exchanger's heat transfer, thereby reach the purpose of getting hot water not getting water.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the filter mechanism of the present invention;
FIG. 3 is a top view of the filter mechanism construction of the present invention;
FIG. 4 is a top cross-sectional view of the filter mechanism of the present invention.
In the figure: 1. a heat exchange mechanism; 11. a water recovery well; 12. a delivery pipe; 13. a connecting pipe; 14. a plate heat exchanger; 15. recharging the well; 2. a filtering mechanism; 21. a first three-way pipe; 22. a first filtering pipe; 23. a second filtering pipe; 24. a filter cartridge; 241. an impurity tank; 242. a cover plate; 243. a hasp; 244. a card holder; 25. a first filter screen; 26. a second filter screen; 27. a third filter screen; 28. a water purifying pipe; 29. a second three-way pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the invention discloses an enhanced geothermal heating system, which comprises a heat exchange mechanism 1 and a filtering mechanism 2, wherein the heat exchange mechanism 1 is communicated with the filtering mechanism 2, the heat exchange mechanism 1 comprises a water recovery well 11, a connecting pipe 13, a plate heat exchanger 14 and a recharging well 15, a conveying pipe 12 is arranged in the water recovery well 11, and the plate heat exchanger 14 is H150/C in model;
the filtering mechanism 2 comprises a first three-way pipe 21 and a second three-way pipe 29, a first three-way pipe 21 is fixedly arranged at one end of the conveying pipe 12 far away from the water extraction well 11, a first filtering pipe 22 and a second filtering pipe 23 are respectively fixedly arranged at two ends of the first three-way pipe 21 far away from the conveying pipe 12, filtering boxes 24 are fixedly arranged at one ends of the first filtering pipe 22 and the second filtering pipe 23 far away from the first three-way pipe 21, a first filtering net 25, a second filtering net 26 and a third filtering net 27 are sequentially and movably arranged in the filtering boxes 24 from left to right, a purified water pipe 28 is fixedly arranged at one side of each filtering box 24, one end of each purified water pipe 28 far away from the filtering box 24 is fixedly connected with one end of the second three-way pipe 29, and by arranging the heat exchange mechanism 1 and the filtering mechanism 2, when the filtering boxes 24 need to be replaced, a valve in the first filtering pipe 22 is closed, the filter box 24 corresponding to the first filter pipe 22 can be replaced without affecting the delivery of geothermal water by the second filter pipe 23, thereby solving the problems that the conventional filter device is inconvenient to replace the filter element, the geothermal heat supply efficiency is reduced, the device has simple operation mode, ensures the geothermal heat supply efficiency, is convenient for users to use, the heat exchange mechanism 1 and the filtering mechanism 2 are arranged, the first filter screen 25 is used for preliminarily intercepting large particle impurities in geothermal water, the geothermal water after preliminary filtration is filtered by the second filter screen 26 and the third filter screen 27, so that the impurities in the geothermal water are effectively filtered, the problem that the conventional filtering device has a simpler structure is solved, the filtered geothermal water is re-filled into the recharging well 15 after heat exchange of the plate heat exchanger 14, so that the purpose of taking heat but not water is achieved.
Specifically, a valve is arranged inside the conveying pipe 12, and a check valve is arranged inside the purified water pipe 28.
In this embodiment, the one-way valve prevents geothermal water inside the second three-way pipe 29 from flowing back to the inside of the clean water pipe 28.
Specifically, one ends of the two purified water pipes 28, which are far away from the filter box 24, are fixedly connected with two ends of a second three-way pipe 29 respectively, a connecting pipe 13 is fixedly arranged at one end of the second three-way pipe 29, which is far away from the purified water pipes 28, and one end of the connecting pipe 13, which is far away from the second three-way pipe 29, is communicated with the recharge well 15 through a plate heat exchanger 14.
In this embodiment, the bottom of conveyer pipe 12 is provided with the immersible pump, start the immersible pump and pump the inside of geothermal water pump income conveyer pipe 12, when changing first filter screen 25, second filter screen 26 and third filter screen 27, close the inside valve of one of them conveyer pipe 12, can change and close corresponding filter cartridge 24 with the valve, do not influence geothermal water's transport simultaneously, user's use has been made things convenient for, the geothermal water after the filtration recharges to the inside of recharging well 15 after the heat transfer of plate heat exchanger 14 again, thereby reach the purpose of getting the heat and not getting water, the usability of the device has been increased.
Specifically, an impurity groove 241 is formed in one side of the inner wall of the filter box 24, clamping seats 244 are fixedly arranged on the top surface and the bottom surface of the inner wall of the filter box 24, and two ends of the first filter screen 25, the second filter screen 26 and the third filter screen 27 extend into the clamping seats 244 respectively.
In this embodiment, first filter screen 25 is conventional filter screen, second filter screen 26 is the activated carbon filter screen, third filter screen 27 is the manganese sand filter screen, conventional filter screen carries out preliminary interception to the large granule impurity in the geothermal water, geothermal water after the preliminary filtration is in the filtration through activated carbon filter screen and manganese sand filter screen, make impurity in the geothermal water effectively filtered, impurity groove 241 is used for accepting first filter screen 25, the impurity of second filter screen 26 and the filtering of third filter screen 27, user's use has been made things convenient for.
Specifically, a buckle 243 is fixedly arranged on one side of the filter box 24, a buckle matched with the buckle 242 is fixedly arranged on one side of the cover plate 242, and the buckle 243 is overlapped with the buckle.
In this embodiment, the joint of the cover plate 242 and the filter box 24 is sealed by a sealing gasket, and the buckle 243 and the snap are combined buckles, which are conventional structures, thereby facilitating locking after the cover plate 242 is closed, and facilitating use of a user.
The working principle and the using process of the invention are as follows: when the device is used, geothermal water enters the inside of the first three-way pipe 21 through the conveying pipe 12 and then enters the inside of the filter box 24 through the first filter pipe 22 and the second filter pipe 23, the first filter screen 25 primarily intercepts large-particle impurities in the geothermal water, the geothermal water after primary filtration is filtered through the second filter screen 26 and the third filter screen 27, so that the impurities in the geothermal water are effectively filtered, when the first filter screen 25, the second filter screen 26 and the third filter screen 27 need to be replaced, the valve inside the first filter pipe 22 is firstly closed, the filter box 24 corresponding to the first filter pipe 22 can be replaced, meanwhile, the delivery of the geothermal water by the second filter pipe 23 is not influenced, otherwise, after the filter box 24 corresponding to the first filter pipe 22 is replaced, the valve inside the first filter pipe 22 is opened, the valve inside the second filter pipe 23 is then closed, and the filter box 24 corresponding to the second filter pipe 23 can be replaced, the first filter 25, the second filter 26 and the third filter 27 can be replaced by opening the cover 242 through the snap 243 and the snap lock, and the foreign matter groove 241 is cleaned, thereby completing the operation of the apparatus.
In conclusion, this geothermal heating system of enhancement mode through setting up heat transfer mechanism 1 and filter mechanism 2, when needing to be changed filter cartridge 24, earlier close the inside valve of first filter tube 22, can change filter cartridge 24 corresponding with first filter tube 22, do not influence second filter tube 23 simultaneously and to the transport of geothermal water, solve conventional filter equipment and be not convenient for change the filter core, reduced geothermal heating efficiency's problem, the device operating mode is simple and guaranteed geothermal heating efficiency, user's use has been made things convenient for.
It should be noted that, in this document, terms such as "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. Geothermal heating system of enhancement mode includes heat transfer mechanism (1) and filtering mechanism (2), its characterized in that: the heat exchange mechanism (1) is communicated with the filtering mechanism (2), the heat exchange mechanism (1) comprises a water production well (11), a connecting pipe (13), a plate heat exchanger (14) and a recharging well (15), and a conveying pipe (12) is arranged inside the water production well (11);
the filtering mechanism (2) comprises a first three-way pipe (21) and a second three-way pipe (29), a first three-way pipe (21) is fixedly arranged at one end of the conveying pipe (12) far away from the water production well (11), a first filtering pipe (22) and a second filtering pipe (23) are respectively and fixedly arranged at the two ends of the first three-way pipe (21) far away from the conveying pipe (12), one ends of the first filtering pipe (22) and the second filtering pipe (23) far away from the first three-way pipe (21) are both fixedly provided with a filtering box (24), a first filter screen (25), a second filter screen (26) and a third filter screen (27) are movably arranged in the filter box (24) from left to right in sequence, one side of the filter box (24) is fixedly provided with a water purifying pipe (28), and one end of the water purifying pipe (28) far away from the filter box (24) is fixedly connected with one end of a second three-way pipe (29).
2. An enhanced geothermal heating system according to claim 1, wherein: the inside of conveyer pipe (12) is provided with the valve, the inside of water purification pipe (28) is provided with the check valve.
3. An enhanced geothermal heating system according to claim 1, wherein: one ends, far away from the filter box (24), of the two water purifying pipes (28) are fixedly connected with two ends of a second three-way pipe (29), and one end, far away from the water purifying pipes (28), of the second three-way pipe (29) is fixedly provided with a connecting pipe (13).
4. An enhanced geothermal heating system according to claim 3, wherein: one end of the connecting pipe (13) far away from the second three-way pipe (29) is communicated with the recharging well (15) through a plate type heat exchanger (14).
5. An enhanced geothermal heating system according to claim 1, wherein: impurity groove (241) have been seted up to one side of filter box (24) inner wall, the top surface and the bottom surface of filter box (24) inner wall all are fixed and are provided with cassette (244), the both ends of first filter screen (25), second filter screen (26) and third filter screen (27) extend to the inside of cassette (244) respectively.
6. An enhanced geothermal heating system according to claim 1, wherein: one side of the filter box (24) is fixedly provided with a hasp (243), one side of the cover plate (242) is fixedly provided with a hasp matched with the hasp (242), and the hasp (243) is overlapped with the hasp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010473059.8A CN111750405A (en) | 2020-05-29 | 2020-05-29 | Enhancement mode geothermal heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010473059.8A CN111750405A (en) | 2020-05-29 | 2020-05-29 | Enhancement mode geothermal heating system |
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| CN111750405A true CN111750405A (en) | 2020-10-09 |
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| CN202010473059.8A Pending CN111750405A (en) | 2020-05-29 | 2020-05-29 | Enhancement mode geothermal heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112229083A (en) * | 2020-10-27 | 2021-01-15 | 江门市锦鸿新能源技术研发有限公司 | Shallow geothermal energy utilizes device based on earth's surface water |
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Application publication date: 20201009 |