CN117219347A - Submarine cable absorption cooling system - Google Patents
Submarine cable absorption cooling system Download PDFInfo
- Publication number
- CN117219347A CN117219347A CN202310963556.XA CN202310963556A CN117219347A CN 117219347 A CN117219347 A CN 117219347A CN 202310963556 A CN202310963556 A CN 202310963556A CN 117219347 A CN117219347 A CN 117219347A
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- Prior art keywords
- submarine cable
- cooling system
- heating
- medium
- cooling
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- 238000001816 cooling Methods 0.000 title claims abstract description 70
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 27
- 238000005057 refrigeration Methods 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 45
- 239000002826 coolant Substances 0.000 claims abstract description 25
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000001704 evaporation Methods 0.000 claims abstract description 8
- 230000008020 evaporation Effects 0.000 claims abstract description 3
- 239000006096 absorbing agent Substances 0.000 claims description 28
- 239000003507 refrigerant Substances 0.000 claims description 26
- 239000012530 fluid Substances 0.000 claims description 17
- 239000013535 sea water Substances 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 6
- 238000009835 boiling Methods 0.000 claims description 4
- 229910021529 ammonia Inorganic materials 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 8
- 230000002745 absorbent Effects 0.000 description 6
- 239000002250 absorbent Substances 0.000 description 6
- 239000000498 cooling water Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Landscapes
- Laying Of Electric Cables Or Lines Outside (AREA)
Abstract
The invention belongs to the technical field of power systems, and discloses a submarine cable absorption cooling system, which comprises: a refrigerator storing a cooling medium; the cable cooling loop is used for extracting cooling medium in the refrigeration house to circularly cool the submarine cable; the refrigerating loop is used for evaporating and refrigerating a cooling medium in the refrigeration house; and the cable heating loop is internally provided with a heating medium, and is used for heating the heating medium by heat generated by the submarine cable in the working process and providing the heated heating medium for the refrigerating loop as a working heat source. According to the invention, heat generated in the working process of the submarine cable at night is used as an input heat source to carry out evaporation refrigeration on the cooling medium in the refrigeration house, and then the submarine cable at daytime is cooled through the submarine cable cooling loop.
Description
Technical Field
The invention relates to the technical field of power systems, in particular to a submarine cable absorption cooling system for a submarine cable landing section.
Background
The submarine cable power transmission has the advantages of long-distance, large capacity and low-loss electric energy cross-sea transmission, and is an effective way for realizing the power supply of islands or offshore platforms in China, the grid connection of new offshore wind power and the internationalization interconnection of the power grid. Submarine cables are in marine environments, the operation of the submarine cables is closely related to marine climate conditions, the submarine laying environment is bad, the cable line span is large, the marine hydrology and geology of a passing area and the climate difference are large, and the operation environment and other parameters of the submarine cables are changeable.
The cable insulation material has the allowable long-term highest working temperature, and the current-carrying capacity of the cable circuit is limited by the main insulation operating temperature of the landing section. The submarine cable is mainly divided into a submarine section, a land landing section and an air section according to the laying environment, wherein the land landing section has the worst cable heat dissipation condition and is a key section for limiting the conveying current-carrying capacity of the submarine cable.
The heat dissipation environment of the submarine cable in the daytime may be inferior to that in the night, which makes the temperature of the submarine cable in the daytime and the night different, the temperature of the submarine cable in the daytime may be higher than that in the night, and the working temperature of the submarine cable in the daytime may be higher than that in the highest working temperature. The submarine cable of the land landing section not only limits the conveying current-carrying capacity, but also can accelerate insulation aging, reduce the service life, increase the possibility of faults such as electric breakdown and thermal breakdown of the submarine cable, cool the submarine cable of the land landing section and improve the conveying capacity of a cable line to a certain extent when the cable works excessively for a long time.
At present, cooling for a submarine cable landing section in engineering mainly comprises the steps of laying a cooling water pipe near the submarine cable land landing section, adopting special backfill, stripping armor of the submarine cable land landing section and the like to improve the current-carrying capacity of the submarine cable landing section. The method for laying the cooling water pipe near the landing section of the submarine cable has the main problems that the landing section is often remote, an independent water source is needed to be additionally built for laying the cooling water pipe, the water level and the water quantity of the cooling water are needed to be monitored in real time, the cooling water pipe is difficult to operate and maintain, and the requirements on the power supply and equipment of the cooling water pump are high. The material cost of adopting special backfill mode is too high, and the cooling effect is limited. The method of stripping the armor of the submarine cable reduces the protection capability of the submarine cable. The principle of the forced water cooling device is similar to that of the water cooling method, the water pump is required to be continuously powered, the cost consumption is high, the water pump cannot work once the device is damaged, and the operation and maintenance cost is high.
Disclosure of Invention
The embodiment of the invention provides a submarine cable absorption cooling system, which aims to solve the technical problems in the prior art.
The technical scheme of the embodiment of the invention is realized as follows:
a submarine cable absorption cooling system comprising: a refrigerator storing a cooling medium; the cable cooling loop is communicated with the refrigeration house and is used for extracting cooling medium in the refrigeration house to circularly cool the submarine cable; and the refrigeration loop is communicated with the refrigeration house and is used for evaporating and refrigerating the cooling medium in the refrigeration house.
Wherein, the cable cooling circuit includes: the cooling pipeline is communicated with the refrigeration house and is wound on the surface of the submarine cable; and the solution pump I is arranged on the cooling pipeline and used for driving the cooling medium to flow in the refrigeration house and the cooling pipeline.
Wherein, the refrigeration circuit includes: the steam generator is used for heating the refrigerating fluid to obtain refrigerant steam; the condenser is connected with the steam generator and the refrigeration house through pipelines and is used for condensing the refrigerant steam to form refrigerating fluid, and the refrigerating fluid is used for absorbing heat of a cooling medium in the refrigeration house; the solution absorber is connected with the refrigeration house and the steam generator through pipelines and is used for recovering the refrigerating fluid and mixing the refrigerating fluid with the stored refrigerating fluid; and the solution pump II is connected to the pipelines of the solution absorber and the steam generator and is used for pumping the refrigerating fluid in the solution absorber into the steam generator.
Furthermore, the refrigeration circuit further comprises: and the throttle valve is connected to a pipeline between the condenser and the refrigeration house and used for adjusting the steam flow of the refrigerant steam.
In addition, the refrigeration circuit further includes: and the pressure reducing valve is connected to a pipeline between the steam generator and the solution absorber and is used for adjusting the evaporation pressure when the refrigerant which is not evaporated in the steam generator flows back to the solution absorber.
Wherein the condenser and the solution absorber are uniformly distributed in seawater, and the condenser and the solution absorber are cooled by the seawater.
Optionally, the cooling medium is seawater.
The cooling medium is used for cooling the submarine cable in the daytime.
Optionally, the refrigerating fluid is a binary solution.
Optionally, the binary solution includes a refrigerant and an absorbent, the refrigerant having a boiling point lower than the absorbent.
Optionally, the refrigerant is ammonia.
Optionally, the absorbent is water.
Furthermore, the submarine cable absorption cooling system further comprises: and the cable heating loop is internally provided with a heating medium, and is used for heating the heating medium by heat generated by the submarine cable in the working process and providing the heated heating medium for the steam generator to serve as a working heat source.
Wherein, the cable heats the return circuit and includes: the heating pipeline is communicated with the steam generator and is wound on the surface of the submarine cable; and the solution pump III is arranged on the heating pipeline and used for driving the heating medium to flow in the heating pipeline and the steam generator.
Wherein the working heat source of the heating medium is from the heat generated by the submarine cable in the night stage in the working process.
Optionally, the heating medium is seawater.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
according to the invention, the submarine cable at night is used as an input heat source to generate the cooling medium in the refrigeration house, and the submarine cable at daytime is cooled through the submarine cable cooling loop, so that compared with the traditional forced cooling method, the cooling device has an energy-saving effect, and the complexity and the randomness of the submarine cable transportation landing section laying environment are considered, so that the efficient and safe cooling effect can be realized, and compared with the traditional cooling device, the cooling device has a wider application prospect.
In addition, the cooling seawater medium and the heating seawater medium can be directly taken as the liquid working medium of the device, and the device has rich water resources and lower manufacturing cost and can continuously provide the liquid working medium for the device.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic diagram illustrating a submarine cable absorption cooling system according to an exemplary embodiment.
Reference numerals:
1. a cold storage; 2. a cooling pipe; 3. a solution pump I; 4. a submarine cable; 5. a steam generator; 6. a condenser; 7. a throttle valve; 8. a solution absorber; 9. a solution pump II; 10. a pressure reducing valve; 11. a heating pipe; 12. solution pump.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments herein to enable those skilled in the art to practice them. Portions and features of some embodiments may be included in, or substituted for, those of others. The scope of the embodiments herein includes the full scope of the claims, as well as all available equivalents of the claims. The terms "first," "second," and the like herein are used merely to distinguish one element from another element and do not require or imply any actual relationship or order between the elements. Indeed the first element could also be termed a second element and vice versa. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure, apparatus, or device that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such structure, apparatus, or device. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a structure, apparatus or device comprising the element. Various embodiments are described herein in a progressive manner, each embodiment focusing on differences from other embodiments, and identical and similar parts between the various embodiments are sufficient to be seen with each other.
The terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like herein refer to an orientation or positional relationship based on that shown in the drawings, merely for ease of description herein and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus are not to be construed as limiting the invention. In the description herein, unless otherwise specified and limited, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, mechanically or electrically coupled, may be in communication with each other within two elements, may be directly coupled, or may be indirectly coupled through an intermediary, as would be apparent to one of ordinary skill in the art.
Embodiments of the invention and features of the embodiments may be combined with each other without conflict.
Fig. 1 shows an embodiment of a submarine cable absorption cooling system according to the invention.
In this optional embodiment, the submarine cable absorption cooling system includes a refrigeration house 1, a cooling medium is stored in the refrigeration house 1, and a cable cooling circuit and a refrigeration circuit are further connected to the refrigeration house 1, where the cable cooling circuit is used for cooling a submarine cable in a daytime; the refrigeration loop is used for evaporating and refrigerating the cooling medium in the refrigeration house 1.
In this alternative embodiment, the cable cooling circuit comprises a cooling pipe 2 and a solution pump 3, wherein the cooling pipe 2 is communicated with the cold store 1 and is wound on a submarine cable 4; the first solution pump 3 is arranged on the cooling pipeline 2 and is used for driving the cooling medium to flow in the refrigeration house 1 and the cooling pipeline 2. The refrigerating circuit comprises a steam generator 5, a condenser 6, a throttle valve 7, a solution absorber 8, a solution pump II 9 and a pressure reducing valve 10, wherein the steam generator 5 is connected with the condenser 6 through a pipeline, the condenser 6 is connected with an inlet of the throttle valve 7 through a pipeline, an outlet of the throttle valve 7 is connected with the cold storage 1 through a pipeline, the cold storage 1 is connected with the solution absorber 8 through a pipeline, the solution absorber 8 is connected with the steam generator 5 through a pipeline with the solution pump II 9, in addition, the steam generator 5 is connected with the solution absorber 8 through another pipeline, and the pressure reducing valve 10 is arranged on the pipeline.
In this alternative embodiment, the submarine cable absorption cooling system further comprises: and the cable heating loop is internally provided with a heating medium, heats the heating medium through heat generated by the submarine cable in the working process, and provides the heated heating medium for the steam generator to serve as a working heat source. Specifically, the cable heating circuit includes: a heating pipe 11 and a solution pump III 12, wherein the heating pipe 11 is connected with the steam generator 5 and is wound on the surface of the submarine cable; the solution pump III 12 is arranged on the heating pipeline 11 and is used for driving the heating medium to flow in the heating pipeline and the steam generator.
In a specific application, the working heat source of the steam generator 5 is provided by a cable heating loop, the refrigeration house 1 provides a cooling working medium for a cable cooling loop, the cooling working medium is used for cooling the submarine cable 4 in a daytime, and the refrigeration loop uses heat generated by the submarine cable 4 in a night stage in the working process as an input heat source to realize cooling of the submarine cable 4 in the daytime.
The condenser 6 and the solution absorber 8 are uniformly distributed in the seawater, and the condenser 6 and the solution absorber 8 are cooled by the seawater. And seawater can be used as both the cooling medium and the heating medium. The refrigerating fluid is a binary solution, the binary solution comprises a refrigerant and an absorbent, and the boiling point of the refrigerant is lower than that of the absorbent. Specifically, the refrigerant may be ammonia, and the absorbent may be water.
When in specific use, at night stage: the binary solution is conveyed into the steam generator 5 through the solution pump II 9 by the solution absorber 8, most of refrigerant with lower boiling point is evaporated into refrigerant vapor after being heated by the solution pump II 9, the refrigerant vapor is condensed into refrigerant liquid after entering the condenser 6, then the refrigerant liquid is reduced in pressure to the evaporating pressure by the throttle valve 7 and enters the refrigeration house 1, and the heat of seawater in the refrigeration house 1 is absorbed to be a low-temperature cooling medium, and meanwhile, the refrigerant liquid is also stored in the refrigeration house 1;
during the daytime, the refrigerant liquid stored in the refrigerator 1 flows back to the solution absorber 8 again, while the refrigerant not evaporated in the vapor generator 5 flows back to the solution absorber 8 through the pressure reducing valve 10, at which time the working medium solution in the solution absorber 8 is restored to the original concentration.
Therefore, the invention uses the submarine cable at night as an input heat source to generate the cooling medium in the refrigeration house, and then cools the submarine cable at daytime through the submarine cable cooling loop, compared with the traditional forced cooling method, the invention has the energy-saving effect, considers the complexity and randomness of the submarine cable transportation landing section laying environment, can realize the efficient and safe cooling effect, and has wider application prospect compared with the traditional cooling device. In addition, the cooling seawater medium and the heating seawater medium can be directly taken as the liquid working medium of the device, and the device has rich water resources and lower manufacturing cost and can continuously provide the liquid working medium for the device.
The present invention is not limited to the structure that has been described above and shown in the drawings, and various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (16)
1. A submarine cable absorption cooling system, comprising:
a refrigerator storing a cooling medium;
the cable cooling loop is communicated with the refrigeration house and is used for extracting cooling medium in the refrigeration house to circularly cool the submarine cable;
and the refrigeration loop is communicated with the refrigeration house and is used for evaporating and refrigerating the cooling medium in the refrigeration house.
2. The submarine cable absorption cooling system according to claim 1, wherein the cable cooling circuit comprises:
the cooling pipeline is communicated with the refrigeration house and is wound on the surface of the submarine cable;
and the solution pump I is arranged on the cooling pipeline and used for driving the cooling medium to flow in the refrigeration house and the cooling pipeline.
3. The submarine cable absorption cooling system according to claim 2, wherein the refrigeration circuit comprises:
the steam generator is used for heating the refrigerating fluid to obtain refrigerant steam;
the condenser is connected with the steam generator and the refrigeration house through pipelines and is used for condensing the refrigerant steam to form refrigerating fluid, and the refrigerating fluid is used for absorbing heat of a cooling medium in the refrigeration house;
the solution absorber is connected with the refrigeration house and the steam generator through pipelines and is used for recovering the refrigerating fluid and mixing the refrigerating fluid with the stored refrigerating fluid;
and the solution pump II is connected to the pipelines of the solution absorber and the steam generator and is used for pumping the refrigerating fluid in the solution absorber into the steam generator.
4. A submarine cable absorption cooling system according to claim 3, wherein the refrigeration circuit further comprises:
and the throttle valve is connected to a pipeline between the condenser and the refrigeration house and used for adjusting the steam flow of the refrigerant steam.
5. A submarine cable absorption cooling system according to claim 3, wherein the refrigeration circuit further comprises:
and the pressure reducing valve is connected to a pipeline between the steam generator and the solution absorber and is used for adjusting the evaporation pressure when the refrigerant which is not evaporated in the steam generator flows back to the solution absorber.
6. A submarine cable absorption cooling system according to claim 3, wherein the condenser and the solution absorber are evenly distributed in sea water, and the condenser and the solution absorber are cooled by the sea water.
7. A submarine cable absorption cooling system according to claim 3, wherein the cooling medium is sea water.
8. The submarine cable absorption cooling system according to claim 7, wherein the cooling medium is used to cool down the submarine cable during the daytime.
9. The submarine cable absorption cooling system according to claim 7, wherein the refrigerant fluid is a binary solution.
10. The submarine cable absorption cooling system according to claim 9, wherein the binary solution comprises a refrigerant and an absorber, the refrigerant having a boiling point lower than the absorber.
11. The submarine cable absorption cooling system according to claim 10, wherein the refrigerant is ammonia.
12. The submarine cable absorption cooling system according to claim 11, wherein the absorber is water.
13. A submarine cable absorption cooling system according to claim 3, further comprising:
and the cable heating loop is internally provided with a heating medium, and is used for heating the heating medium by heat generated by the submarine cable in the working process and providing the heated heating medium for the steam generator to serve as a working heat source.
14. The submarine cable absorption cooling system according to claim 13, wherein the cable heating circuit comprises:
the heating pipeline is communicated with the steam generator and is wound on the surface of the submarine cable;
and the solution pump III is arranged on the heating pipeline and used for driving the heating medium to flow in the heating pipeline and the steam generator.
15. The submarine cable absorption cooling system according to claim 14, wherein the working heat source for the heating medium is from heat generated by submarine cable operation during the night phase.
16. The submarine cable absorption cooling system according to claim 15, wherein the heating medium is seawater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310963556.XA CN117219347A (en) | 2023-08-02 | 2023-08-02 | Submarine cable absorption cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310963556.XA CN117219347A (en) | 2023-08-02 | 2023-08-02 | Submarine cable absorption cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117219347A true CN117219347A (en) | 2023-12-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310963556.XA Pending CN117219347A (en) | 2023-08-02 | 2023-08-02 | Submarine cable absorption cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117219347A (en) |
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2023
- 2023-08-02 CN CN202310963556.XA patent/CN117219347A/en active Pending
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