CN115031424A - Cooling insulation system based on phase change fire extinguishing agent - Google Patents
Cooling insulation system based on phase change fire extinguishing agent Download PDFInfo
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- CN115031424A CN115031424A CN202210708171.4A CN202210708171A CN115031424A CN 115031424 A CN115031424 A CN 115031424A CN 202210708171 A CN202210708171 A CN 202210708171A CN 115031424 A CN115031424 A CN 115031424A
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- 238000001816 cooling Methods 0.000 title claims abstract description 61
- 238000009413 insulation Methods 0.000 title claims abstract description 36
- 230000008859 change Effects 0.000 title claims description 15
- 239000003507 refrigerant Substances 0.000 claims abstract description 103
- 239000007788 liquid Substances 0.000 claims abstract description 58
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 30
- 239000000110 cooling liquid Substances 0.000 claims abstract description 22
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000003063 flame retardant Substances 0.000 claims abstract description 11
- 238000005086 pumping Methods 0.000 claims description 20
- WVSNNWIIMPNRDB-UHFFFAOYSA-N 1,1,1,3,3,4,4,5,5,6,6,6-dodecafluorohexan-2-one Chemical group FC(F)(F)C(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F WVSNNWIIMPNRDB-UHFFFAOYSA-N 0.000 claims description 10
- 230000008016 vaporization Effects 0.000 claims description 2
- 238000005057 refrigeration Methods 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 37
- 230000008901 benefit Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000008033 biological extinction Effects 0.000 description 7
- 239000002826 coolant Substances 0.000 description 7
- 229910018503 SF6 Inorganic materials 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- UKACHOXRXFQJFN-UHFFFAOYSA-N heptafluoropropane Chemical compound FC(F)C(F)(F)C(F)(F)F UKACHOXRXFQJFN-UHFFFAOYSA-N 0.000 description 4
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 4
- 229960000909 sulfur hexafluoride Drugs 0.000 description 4
- 238000009835 boiling Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- YFIIENAGGCUHIQ-UHFFFAOYSA-N 1,1,1,2,2,3,3-heptachloropropane Chemical compound ClC(Cl)C(Cl)(Cl)C(Cl)(Cl)Cl YFIIENAGGCUHIQ-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002242 deionisation method Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- -1 ketone compound Chemical class 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C31/00—Delivery of fire-extinguishing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/006—Accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20218—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant without phase change in electronic enclosures
- H05K7/20263—Heat dissipaters releasing heat from coolant
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The invention relates to refrigeration and insulation of a direct current converter station, in particular to a cooling insulation system based on a phase-change fire extinguishing agent. The cooling insulation system based on the phase-change fire extinguishing agent comprises a part to be cooled, an electrical switch and a compressor refrigerating device, wherein the part to be cooled is provided with a cooling liquid flow channel, the electrical switch is arranged in a closed switch box, the compressor refrigerating device takes the flame-retardant phase-change fire extinguishing agent as a refrigerant, the compressor refrigerating device comprises a compressor, a condenser and a throttling element, and an outlet of the throttling element is communicated to a cooling liquid channel and is used for enabling the refrigerant in a liquid state to be vaporized into a gas state while cooling the part to be cooled; the outlet of the cooling liquid flow channel is communicated with the switch box body and is used for enabling the refrigerant vaporized into a gaseous state to extinguish the arc of the switch structure in the switch box body; the inlet of the compressor is connected to the outlet of the switch box body. The invention can solve the problems of complex structure and large volume of a cooling and insulating double system adopted by a direct current converter station integrating a component to be cooled and a high-voltage switch in the prior art.
Description
Technical Field
The invention relates to refrigeration and insulation of a direct current converter station, in particular to a cooling insulation system based on a phase-change fire extinguishing agent.
Background
In an electric power system, a direct current converter station is a key device in a direct current transmission system and is used for realizing alternating current-direct current conversion. One core device in the direct current converter station is a direct current converter valve, the direct current converter valve works by means of silicon controlled rectifier, and a large amount of heat is generated during operation, so that the direct current converter valve needs to be cooled.
In the prior art, the direct current converter valve is usually cooled by water cooling, for example, an external cooling system with cold accumulation for the direct current converter valve and an operation method thereof disclosed in the chinese patent application with application publication No. CN103582396A, a closed circulating water cooling system is used for cooling the direct current converter valve. The circulating water needs to be subjected to deionization treatment to lose conductivity, so that the direct current converter valve can be subjected to contact cooling to avoid electrical short circuit. In addition, the dc converter station needs to be configured with a corresponding high-voltage switch, for example, a bypass switch related to a bypass switch protection circuit of the extra-high voltage dc valve set disclosed in the chinese utility model patent with the publication number CN 205595769U. For such high-voltage switches, because of the large current, an arc is generated when the switch is opened and closed, and in order to avoid the performance and the service life being affected by the erosion of the arc to the contact of the switch, the arc generated by the contact needs to be extinguished during use. At present, arc extinction of a high-voltage switch is mostly realized by adopting protective gas, most of the protective gas is sulfur hexafluoride, however, the sulfur hexafluoride is a strong greenhouse effect gas, the global warming potential of the sulfur hexafluoride gas is 23900 times of that of carbon dioxide, the sulfur hexafluoride gas is difficult to decompose in the atmosphere, and the environmental protection property is poor. At present, heptafluoropropane gas is adopted as a protective gas, heptafluoropropane does not cause greenhouse effect, has good environmental protection property, has a boiling point of-16.4 ℃, is usually used for insulation in a gas form, and can timely extinguish arc when a high-voltage switch generates electric arc so as to protect the high-voltage electric switch.
Because the direct current converter valve and the high-voltage switch exist in the direct current converter station at the same time, the temperature control and the flame-retardant insulation of equipment need to be carried out at the same time. If the direct current converter valve is cooled and radiated by using the ionized water and the high-voltage switch is protected by using the heptafluoropropane according to the mode in the prior art, a circulating water system and the heptafluoropropane system need to be arranged at the same time, and the cooling and insulating double system formed by the method has the advantages of complex structure, large volume and high cost. In addition, since the deionized water has a limited dielectric strength and may be decomposed into hydrogen and oxygen under an arc, it is used in a cooling system in consideration of the dielectric strength, cannot be used for higher-strength electrical insulation, and has a limited range of applications.
The heptachloropropane can be used for an insulation system and can also be applied to a cooling system, for example, a cooling fire-fighting hybrid system for an energy storage device and a control method thereof disclosed in the Chinese patent application with the application publication number of CN112038728A, wherein the cooling fire-fighting hybrid system comprises a compressor, a condenser, a throttle valve and the like, and further comprises a cold plate with a cooling channel inside, the cold plate is equivalent to an evaporator, and forms a compressor refrigerating device together with the compressor, the condenser and the throttle valve; the refrigerant used by the cooling fire-fighting hybrid system is a flame-retardant refrigerant (such as heptachloropropane, perfluorohexanone and the like) and has a cooling mode and a fire extinguishing mode. In the cooling mode, the flame-retardant refrigerant is compressed by the compressor, passes through the condenser and the throttle valve, and then is introduced into the cooling branch to cool the energy storage system; in the fire extinguishing mode, the liquid flame-retardant refrigerant is directly conveyed to the spray head through the spraying branch, atomized and sprayed to the energy storage device, so that open fire can be quickly extinguished, and the fire can be quickly suppressed. Although the cooling and fire-fighting hybrid system for the energy storage device can utilize the flame-retardant refrigerant to realize cooling, the to-be-cooled part needs to be cooled by utilizing the liquid refrigerant, the insulation and arc extinction of the electrical switch need the gaseous refrigerant, although the same refrigerant can be utilized for cooling and insulation, a set of independent cooling system and a set of independent insulation system are still required to operate simultaneously, and the problems of complex structure and large volume exist.
Disclosure of Invention
The invention aims to provide a cooling insulation system based on a phase-change fire extinguishing agent, and solves the problems of complex structure and large volume of a cooling insulation double system adopted by a direct current converter station integrating a component to be cooled and a high-voltage switch in the prior art.
The cooling insulation system based on the phase-change fire extinguishing agent adopts the following technical scheme:
the cooling insulation system based on the phase-change fire extinguishing agent comprises a part to be cooled, which is provided with a cooling liquid flow channel, and an electrical switch, which is arranged in a closed switch box body; the compressor refrigeration device comprises a compressor, a condenser and a throttling element which are sequentially arranged, wherein an outlet of the throttling element is communicated with the cooling liquid channel and is used for enabling the refrigerant in a liquid state to enter the cooling liquid channel and absorb the heat of a part to be cooled, and the refrigerant is vaporized into a gas state while the part to be cooled is cooled; the outlet of the cooling liquid flow channel is communicated with the switch box body and is used for enabling the refrigerant vaporized into a gaseous state to extinguish the arc of the switch structure in the switch box body; the inlet of the compressor is connected to the outlet of the switch box body.
The technical scheme has the advantages that the compressor refrigerating device which takes the flame-retardant phase-change extinguishing agent as the refrigerant is arranged, so that the liquid refrigerant passing through the throttling element can be utilized to cool the part to be cooled; the outlet of the cooling liquid flow channel is communicated with the switch box body, so that the switch structure in the switch box body can be subjected to arc extinction by utilizing the insulating property of the flame-retardant phase-change extinguishing agent after the liquid refrigerant absorbs the heat of the part to be cooled and is vaporized into a gas state, and the requirements of the part to be cooled on the liquid refrigerant and the insulating gas of the switch box body are met; therefore, the part to be cooled is used as the evaporator in the refrigerating device of the compressor, so that the cooling system and the insulating system are integrated into a system.
As a further limited technical scheme: and a liquid pumping device is arranged on the circulating path of the refrigerant between the inlet of the cooling liquid flow passage and the throttling element.
The technical solution further defined above has the advantage that the amount of refrigerant leading to the component to be cooled can be guaranteed by the pumping means, thereby meeting the high power cooling requirements and the stable supply requirements of the refrigerant.
As a further limited technical scheme: the liquid pumping device is arranged at the inlet end of the cooling liquid flow passage.
The technical scheme further defined above has the beneficial effects of being beneficial to avoiding the influence of other factors and controlling the supply of the refrigerant more accurately.
As a further limited technical scheme: a gas pumping device is arranged between the switch box body and the compressor on the circulation path of the refrigerant.
The technical scheme further limited has the advantage that the gaseous refrigerant can be ensured to be smoothly discharged from the cooling liquid flow channel and return to the compressor.
As a further limited technical scheme: the refrigerant circulation path is connected with a refrigerant storage tank at the inlet side of the component to be cooled, and the refrigerant storage tank is used for storing liquid phase-change extinguishing agent.
The technical scheme has the advantages that the refrigerant storage tank is arranged to supplement the refrigerant to the circulating pipeline of the refrigerant when the pressure in the pipeline behind the throttling element is low, so that the normal loss of the refrigerant is met, the reliability and stability of the system operation are improved, and the maintenance is convenient.
As a further limited technical scheme: and a liquid supply control valve is arranged on a liquid supply path of the refrigerant storage tank for supplying liquid to the circulating pipeline of the refrigerant.
The above-mentioned technical scheme who further limits's beneficial effect is, sets up the confession liquid control valve and is convenient for control refrigerant storage jar to supply liquid.
As a further limited technical scheme: a flow rate sensor for detecting the flow rate of the refrigerant and a pressure sensor for detecting the pressure of the refrigerant are provided on the circulation line of the refrigerant.
The technical scheme has the advantages that the flow velocity sensor and the pressure sensor are arranged to detect the flow velocity and the pressure of the refrigerant, so that the running condition of the refrigerant is known, corresponding measures are taken according to the running condition, and the stable running of the system is convenient to guarantee.
As a further limited technical scheme: the flow rate sensor and the pressure sensor are connected to the corresponding control devices; the liquid supply control valve is an electromagnetic valve connected with the control device and is used for automatically opening when the refrigerant needs to be supplemented so as to supplement liquid to the circulating pipeline of the refrigerant.
The technical scheme further limited has the advantages that the control device is arranged, so that the control of the liquid supply control valve in the form of the electromagnetic valve is realized, and the liquid can be supplemented to the circulating pipeline of the refrigerant in time.
As a further limited technical scheme: the refrigerant storage tank is connected with a compressed gas container through a pressurization pipeline, the compressed gas container is used for providing pressure for the refrigerant storage tank so as to drive the liquid phase-change extinguishing agent in the refrigerant storage tank to be discharged, and a pressurization valve is arranged on the pressurization pipeline.
The technical scheme has the advantages that the refrigerant can be supplemented to the compressor refrigerating device through the pressurizing pipeline, and stable operation of the system is guaranteed.
As a further limited technical scheme: the refrigerant is perfluorohexanone.
The technical scheme has the advantages that the perfluorohexanone has a high boiling point, and can enter a cooling liquid flow channel of the part to be cooled in a liquid state more easily, so that the part to be cooled can be reliably cooled.
Drawings
FIG. 1 is a schematic structural view of an embodiment 1 of the phase change fire suppressant-based cooling insulation system of the present invention;
fig. 2 is a schematic structural view of another embodiment of the phase change fire suppressant-based cooling insulation system of the present invention.
The names of the components corresponding to the corresponding reference numerals in the drawings are: 11. a direct current converter valve; 12. sealing the box body; 13. an electrical switch; 21. a compressor; 22. a condenser; 23. a throttling element; 24. a cryogen storage tank; 25. a liquid supply control valve; 26. a compressed gas container; 27. a pressurizing valve; 28. a liquid pumping device; 29. a gas pumping device.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the terms of the first and second, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, 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, the appearances of the phrase "comprising an … …" or similar limitation may be present without necessarily excluding the presence of additional identical elements in the process, method, article, or apparatus that comprises the same elements.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be connected internally or indirectly to each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the invention, unless otherwise explicitly specified or limited, the term "provided" should be understood broadly, for example, the object provided may be a part of the body, or may be arranged separately from the body and connected to the body, which may or may not be detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention is described in further detail below with reference to examples.
Embodiment 1 of the phase change fire suppressant-based cooling insulation system of the present invention:
the embodiment is used for cooling the dc converter valves 11 in the dc converter station and providing an insulating environment for the electrical switches 13 in the dc converter station to achieve arc extinction of the electrical switches 13.
As shown in fig. 1, the phase change fire suppressant based cooling insulation system comprises a component to be cooled, i.e. a dc converter valve 11 in a dc converter station, provided with a coolant flow channel. The dc converter valve 11 provided with the coolant flow passage is a structure of the prior art and will not be described in detail here. The electric switch 13 in the cooling insulation system based on the phase-change fire extinguishing agent is arranged in the closed box body 12, and the closed box body 12 provides a closed insulating gas inflation environment for the contact of the electric switch 13, so that the contact can realize arc extinction by means of insulating gas.
The phase-change fire extinguishing agent-based cooling insulation system further comprises a compressor refrigerating device, and the compressor refrigerating device takes perfluorohexanone as a refrigerant. Perfluorohexanone is a fluorinated ketone compound, a clear, colorless, odorless liquid. The boiling point of perfluorohexanone at 1 atmosphere pressure was 49.2 ℃. The evaporation heat of the fire extinguishing agent is only 1/25 times of water, the vapor pressure is 25 times of water, the properties make the fire extinguishing agent easy to vaporize and exist in a gas state, the fire extinguishing agent mainly depends on heat absorption to achieve the fire extinguishing effect, the fire extinguishing concentration is 4-6%, the safety margin is high, and the fire extinguishing agent is safer for human bodies when in use. The dielectric strength of the perfluorohexanone is 76.4kV, the perfluorohexanone has extremely low corrosivity, and the perfluorohexanone does not corrode electrical equipment; the fire extinguishing agent has the characteristic of easy vaporization, and is very convenient for on-site cleaning after fire extinguishing; it has a more prominent environmentally friendly feature, its Ozone Depletion Potential (ODP): 0, Global Warming Potential (GWP): atmospheric survival life (years): 0.014(5 days).
Similar to the architecture of the compressor refrigeration device in the prior art, the compressor refrigeration device in the present invention includes a compressor 21, a condenser 22 and a throttling element 23 arranged in sequence. The throttling element 23 is an expansion valve, an outlet of the throttling element is communicated with a cooling liquid channel of the direct current converter valve 11, and the throttling element is used for enabling a liquid refrigerant to enter the cooling liquid channel, absorbing heat of the direct current converter valve 11 and cooling the direct current converter valve 11; meanwhile, the liquid refrigerant absorbs heat and then is vaporized into a gas state. Although the compressor refrigeration device of the present invention is not provided with an evaporator, the dc converter valve 11 provided with the coolant flow passage can substantially serve as an evaporator of the compressor refrigeration device, enabling the compressor refrigeration device to form a complete refrigerant cycle. The outlet of the coolant flow channel leads to the switch cabinet, and the refrigerant vaporized into a gaseous state can be used as an insulating medium of the electrical switch 13 for arc extinction of the switch structure in the switch cabinet. An inlet of the compressor 21 is connected to an outlet of the switch case, and a circulation operation of the refrigerant can be realized.
In order to achieve better cooling control and guarantee cooling effect, a temperature sensor (not shown in the figure) is arranged on the dc converter valve 11, the temperature sensor is connected to the control device, and if the output temperature value of the temperature sensor exceeds a set value, the power of the compressor 21 and the flow rates of the liquid pumping device 28 and the gas pumping device 29 are increased, so that the cooling of the dc converter valve 11 is accelerated. If the power of the compressor 21 and the flow rates of the liquid pumping device 28 and the gas pumping device 29 are increased, the temperature of the dc converter valve is not significantly affected, and the control device gives an alarm.
The phase-change fire extinguishing agent-based cooling insulation system further comprises a refrigerant storage tank 24 and a compressed gas container 26, wherein the refrigerant storage tank 24 is used for storing the phase-change fire extinguishing agent in a liquid state, and the compressed gas container 26 is filled with inert compressed gas, in this embodiment compressed nitrogen, for providing pressure to the refrigerant storage tank 24 to drive the liquid phase-change fire extinguishing agent in the refrigerant storage tank 24 to be discharged. The refrigerant storage tank 24 is connected to the inlet side of the direct current converter valve 11, a solenoid valve serving as a liquid supply control valve 25 is arranged on a liquid supply path of the refrigerant storage tank 24 for supplying liquid to the refrigerant circulation pipeline, and the refrigerant can be supplemented to the refrigerant circulation pipeline when the pressure behind the throttling element 23 is low, so that the normal loss of the refrigerant is met. Correspondingly, a flow rate sensor (not shown in the figure) for detecting the flow rate of the refrigerant and a pressure sensor (not shown in the figure) for detecting the pressure of the refrigerant are arranged on the circulating pipeline of the refrigerant, the flow rate sensor and the pressure sensor are connected to corresponding control devices, and the liquid supply control valve 25 is opened for liquid supplement when the refrigerant needs to be supplemented. If the flow and the pressure are abnormal, such as rapid drop, the control system sends out an alarm signal to report and repair the pipeline. The refrigerant storage tank 24 is connected to a pressurization line, and a connection port for connecting a compressed gas container 26 is provided at the end of the pressurization line, and a pressurization valve 27 is further provided on the pressurization line. When the system needs to be supplemented with the flame-retardant phase-change fire extinguishing agent, the control device controls the pressurization valve 27 and the liquid supply control valve 25 to be opened, so that the flame-retardant phase-change fire extinguishing agent is supplemented to the circulating pipeline of the compressor refrigerating device in time, and the reliable work of the system is ensured.
In order to better meet the high power cooling requirement of the dc converter valve 11, a liquid pumping device 28 is arranged on the circulation path of the refrigerant between the inlet of the cooling liquid flow passage and the throttling element 23, so that the refrigerant can be supplied to the dc converter valve 11 at a set flow rate. In order to ensure that the gaseous refrigerant is smoothly discharged from the coolant flow passage and returned to the compressor 21, a gas pumping device 29 is provided on the circulation path of the refrigerant between the switch case and the compressor 21.
When the system operates, the compressor 21 compresses the gas refrigerant discharged from the switch box body, the gas refrigerant is changed into high-temperature high-pressure gas refrigerant, the gas refrigerant is changed into high-temperature high-pressure liquid refrigerant after being condensed by the condenser 22, the liquid refrigerant is changed into low-temperature low-pressure liquid refrigerant after passing through the throttling element 23, the liquid refrigerant is conveyed into the cooling liquid flow channel of the direct current converter valve 11 through the liquid circulating pump, the heat of the direct current converter valve 11 is absorbed, the direct current converter valve 11 is vaporized into gas while the cooling requirement of the direct current converter valve 11 is met, and then the gas refrigerant is introduced into the switch box body to play an insulating role in the switch structure in the switch box body, and arc extinction is performed during the switching action. The gaseous refrigerant discharged from the switch cabinet is finally pumped back to the compressor 21 by the gas pumping device 29, completing a working cycle.
Whether the refrigerant is in a gas state or a liquid state after being compressed by the compressor 21 depends on the compression ratio of the compressor 21, and since the condenser 22 is arranged between the compressor 21 and the throttling element 23, the high-pressure gas state to the high-pressure liquid state is condensed, and the compression ratio of the compressor 21 is not required to be too high, which is beneficial to reducing the compression performance requirement of the compressor 21.
Embodiment 2 of the phase change fire suppressant based cooling insulation system of the present invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the inlet end of the coolant flow path is provided with a liquid pumping device 28. In the present embodiment, the cooling requirement of the dc converter valve 11 is small, and the circulation of the refrigerant is realized only by the compressor 21.
In other embodiments, when the liquid pumping device 28 is provided, the liquid pumping device 28 may be provided at other positions between the inlet of the coolant flow passage and the throttling element 23, for example, at the side of the liquid supply control valve 25 close to the throttling element 23.
Embodiment 3 of the phase change fire suppressant-based cooling insulation system of the present invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, a gas pumping device 29 is provided between the switch case and the compressor 21. In the present embodiment, the cooling requirement of the dc converter valve 11 is small, the circulation line is short, and the circulation of the refrigerant is realized only by the compressor 21.
In embodiment 1, one dc converter valve 11 is provided, one electrical switch 13 is provided, and the dc converter valve 11 and the electrical switch 13 are in a one-to-one relationship. In other embodiments, as shown in fig. 2, the dc converter valve 11 is provided with two places and the electrical switch 13 is provided with one place. Of course, in other embodiments, one dc converter valve 11 may be matched with two or more electrical switches 13, or two or more dc converter valves 11 may be matched with two or more electrical switches 13.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. The cooling insulation system based on the phase-change fire extinguishing agent comprises a part to be cooled, which is provided with a cooling liquid flow channel, and an electric switch (13) arranged in a closed switch box body; the device is characterized by also comprising a compressor refrigerating device taking a flame-retardant phase-change extinguishing agent as a refrigerant, wherein the compressor refrigerating device comprises a compressor (21), a condenser (22) and a throttling element (23) which are sequentially arranged, and an outlet of the throttling element (23) is communicated to the cooling liquid channel and is used for enabling the refrigerant in a liquid state to enter the cooling liquid channel, absorbing the heat of a part to be cooled, cooling the part to be cooled and vaporizing the part to be cooled into a gas state; the outlet of the cooling liquid flow channel is communicated with the switch box body and is used for enabling the refrigerant vaporized into a gaseous state to extinguish the arc of the switch structure in the switch box body; the inlet of the compressor (21) is connected to the outlet of the switch box.
2. A cooling insulation system based on phase change fire suppressant according to claim 1, characterized in that a liquid pumping device (28) is provided on the circulation path of the refrigerant between the inlet of the cooling liquid flow passage and the throttling element (23).
3. A phase change fire suppressant-based cooling insulation system according to claim 2, characterized in that a liquid pumping device (28) is arranged at the inlet end of the cooling liquid flow channel.
4. A cooling insulation system based on phase change fire suppressant according to claim 1, characterized in that a gas pumping device (29) is provided on the circulation path of the refrigerant between the switch cabinet and the compressor (21).
5. A cooling insulation system based on phase change fire suppressant according to any of claims 1 to 4, characterized in that a refrigerant storage tank (24) is connected to the refrigerant circulation path on the inlet side of the component to be cooled for storing the phase change fire suppressant in liquid state.
6. The phase-change fire extinguishing agent based cooling insulation system according to claim 5, characterized in that a liquid supply control valve (25) is provided on a liquid supply path of the refrigerant storage tank (24) supplying liquid to the circulating pipeline of the refrigerant.
7. The phase-change fire extinguishing agent based cooling insulation system according to claim 6, wherein a flow rate sensor for detecting a flow rate of the refrigerant, a pressure sensor for detecting a pressure of the refrigerant are provided on the circulation line of the refrigerant.
8. The phase change fire suppressant-based cooling insulation system according to claim 7, wherein the flow rate sensor and the pressure sensor are connected to respective control means; the liquid supply control valve (25) is an electromagnetic valve connected with the control device and is used for automatically opening to replenish liquid to a circulating pipeline of the refrigerant when the refrigerant needs to be replenished.
9. The phase-change fire extinguishing agent based cooling insulation system according to claim 5, characterized in that the refrigerant storage tank (24) is connected with a compressed gas container (26) through a pressurization pipeline, the compressed gas container (26) is used for providing pressure to the refrigerant storage tank (24) to drive the liquid phase-change fire extinguishing agent in the refrigerant storage tank (24) to be discharged, and a pressurization valve (27) is arranged on the pressurization pipeline.
10. The phase change fire suppressant-based cooling insulation system according to any one of claims 1 to 4, wherein said refrigerant is perfluorohexanone.
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| CN202210708171.4A CN115031424A (en) | 2022-06-21 | 2022-06-21 | Cooling insulation system based on phase change fire extinguishing agent |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004123803A (en) * | 2002-09-30 | 2004-04-22 | Sanyo Electric Co Ltd | Refrigerant composition and refrigerant circuit using the same |
| CN103582396A (en) * | 2013-11-06 | 2014-02-12 | 国家电网公司 | Outer cooling system with stored cold for direct current converter valve and operation method thereof |
| CN103648252A (en) * | 2013-11-15 | 2014-03-19 | 深圳市禾望电气有限公司 | Cooling system for electrical device |
| KR102143351B1 (en) * | 2019-04-12 | 2020-08-11 | (주) 예스티 | Cooling system including fire-fighting function |
| CN111603709A (en) * | 2020-06-29 | 2020-09-01 | 上海豫源电力科技有限公司 | Fire-fighting system of container energy storage battery cabinet |
| CN112038728A (en) * | 2020-08-28 | 2020-12-04 | 浙江南都电源动力股份有限公司 | Cooling and fire-fighting hybrid system for energy storage device and control method thereof |
| CN112629156A (en) * | 2020-12-22 | 2021-04-09 | 杭州电子科技大学 | Application of Novec1230 as immersion type insulating cooling liquid |
| CN112721736A (en) * | 2021-01-14 | 2021-04-30 | 哈尔滨工程大学 | Integrated power battery thermal management system with cooling and fire extinguishing functions |
| CN213984141U (en) * | 2020-10-16 | 2021-08-17 | 国创移动能源创新中心(江苏)有限公司 | Cooling system for charging device |
-
2022
- 2022-06-21 CN CN202210708171.4A patent/CN115031424A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004123803A (en) * | 2002-09-30 | 2004-04-22 | Sanyo Electric Co Ltd | Refrigerant composition and refrigerant circuit using the same |
| CN103582396A (en) * | 2013-11-06 | 2014-02-12 | 国家电网公司 | Outer cooling system with stored cold for direct current converter valve and operation method thereof |
| CN103648252A (en) * | 2013-11-15 | 2014-03-19 | 深圳市禾望电气有限公司 | Cooling system for electrical device |
| KR102143351B1 (en) * | 2019-04-12 | 2020-08-11 | (주) 예스티 | Cooling system including fire-fighting function |
| CN111603709A (en) * | 2020-06-29 | 2020-09-01 | 上海豫源电力科技有限公司 | Fire-fighting system of container energy storage battery cabinet |
| CN112038728A (en) * | 2020-08-28 | 2020-12-04 | 浙江南都电源动力股份有限公司 | Cooling and fire-fighting hybrid system for energy storage device and control method thereof |
| CN213984141U (en) * | 2020-10-16 | 2021-08-17 | 国创移动能源创新中心(江苏)有限公司 | Cooling system for charging device |
| CN112629156A (en) * | 2020-12-22 | 2021-04-09 | 杭州电子科技大学 | Application of Novec1230 as immersion type insulating cooling liquid |
| CN112721736A (en) * | 2021-01-14 | 2021-04-30 | 哈尔滨工程大学 | Integrated power battery thermal management system with cooling and fire extinguishing functions |
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