CN112611244A - Passive cold accumulation type heat exchange device - Google Patents
Passive cold accumulation type heat exchange device Download PDFInfo
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- CN112611244A CN112611244A CN202011346554.9A CN202011346554A CN112611244A CN 112611244 A CN112611244 A CN 112611244A CN 202011346554 A CN202011346554 A CN 202011346554A CN 112611244 A CN112611244 A CN 112611244A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
- F24F2005/0025—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice using heat exchange fluid storage tanks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
- F24F2012/005—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid using heat pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0035—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for domestic or space heating, e.g. heating radiators
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- 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
- Y02E60/14—Thermal energy storage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses a passive cold accumulation type heat exchange device, which comprises: treat refrigerated heat dissipation room, heat pipe subassembly, cold-storage water tank, ventilation room, the ventilation room is adjacent with the heat dissipation room and separates through the floor, and the ventilation room sets up in heat dissipation room top, and the heat pipe subassembly includes: at least two heat pipes for transferring heat, the heat pipes are used for holding liquid working medium, and the heat pipes comprise: the heat pipe penetrates through a floor between a ventilation room and a heat dissipation room, the heat insulation section is arranged in the floor, the evaporation section is arranged in the heat dissipation room, the condensation section is arranged in a cold accumulation water tank, the cold accumulation water tank is used for introducing cooling water to accumulate cold for liquid working media in the heat pipe, and the cold accumulation water tank is arranged in the ventilation room. After internal and external power supplies of all nuclear power plants are lost, the passive cold accumulation type heat exchange device maintains the temperature of a heat dissipation room within a certain time not to exceed a design value only by means of water cold accumulation and heat pipe passive heat conduction.
Description
Technical Field
The invention belongs to the technical field of heat exchange, and particularly relates to a passive cold accumulation type heat exchange device.
Background
The design temperature in the room still needs to be guaranteed after the nuclear power station main control room loses normal power supply. In the existing design, a diesel generator is used for supplying power to active ventilation and cooling equipment when power is lost, the design is complex, the investment is high, certain failure risk still exists, and the noise generated by the active equipment influences the working efficiency of operators in a main control room.
In addition, a space enclosing structure cold accumulation scheme adopting concrete and metal fins is provided, certain cold energy is released to reduce the room temperature in an accident, but the concrete cold accumulation density and the fin heat transfer coefficient are low, the facility land occupation is too large, and all cold loads of the room are difficult to bear in the actual engineering.
Disclosure of Invention
The invention aims to solve the technical problem that the defects in the prior art are overcome, and the passive cold accumulation type heat exchange device is provided, so that after internal and external power supplies of all nuclear power plants are lost, the temperature of a heat dissipation room is kept not to exceed a design value within a certain time only by means of water cold accumulation and passive heat conduction of heat pipes.
The technical scheme adopted for solving the technical problem of the invention is to provide a passive cold-storage heat exchange device, which comprises: treat refrigerated heat dissipation room, heat pipe subassembly, cold-storage water tank, ventilation room, the ventilation room is adjacent with the heat dissipation room and separates through the floor, and the ventilation room sets up in heat dissipation room top, and the heat pipe subassembly includes: at least two heat pipes for transferring heat, the heat pipes are used for holding liquid working medium, and the heat pipes comprise: the heat pipe penetrates through a floor between a ventilation room and a heat dissipation room, the heat insulation section is arranged in the floor, the evaporation section is arranged in the heat dissipation room, the condensation section is arranged in a cold accumulation water tank, the cold accumulation water tank is used for introducing cooling water to accumulate cold for liquid working media in the heat pipe, and the cold accumulation water tank is arranged in the ventilation room.
Preferably, the heat pipe includes: the inner layer copper pipe and the outer layer steel pipe are arranged outside the inner layer copper pipe.
Preferably, the cold storage water tank includes: the water tank comprises a water tank body, a water inlet, a ventilation opening, an overflow opening and a water drainage opening, wherein the water inlet is arranged on the water tank body and used for water inflow, the ventilation opening is used for ventilation, the overflow opening is used for overflow, and the water drainage opening is used for water drainage.
Preferably, the cold storage water tank further includes: the fire-fighting water port is arranged on the water tank body and is provided with a preset water level. The cold storage water tank can provide fire-fighting water for an iodine adsorber in an emergency filtering system of a heat dissipation room nearby, so that the water requirement in a fire disaster is met, and a factory building fire-fighting system is simplified.
Preferably, the passive cold storage type heat exchanger further includes: the water temperature detection device comprises a temperature detector arranged in a water tank body, a water inlet pipe connected with a water inlet and an electric regulating valve arranged on the water inlet pipe, wherein the temperature detector is electrically connected with the electric regulating valve; when the water temperature detected by the temperature detector is higher than the lower limit of the design value, the electric control valve is closed in an interlocking mode.
Preferably, the heat pipe assembly further includes: go up backup pad, pre-buried channel-section steel, go up the backup pad and set up on cold-storage water tank's bottom plate, the heat pipe is connected with last backup pad, and pre-buried channel-section steel is pre-buried in the floor, goes up backup pad and pre-buried channel-section steel fixed connection.
Preferably, the heat pipe assembly further includes: the lower supporting plate is fixedly connected with the embedded channel steel, and the heat pipe is only in contact connection with the lower supporting plate.
Preferably, the heat pipe assembly further includes: the heat pipe is connected with the flange and is fixed on the upper supporting plate through the flange.
Preferably, the heat dissipation room is any one or more of a master control room, an electrical equipment room, an instrument control equipment room, a reactor containment, a diesel generator hall and a wind pipe.
Preferably, the heat pipes are arranged in an array.
The cold accumulation function of the heat exchange device is realized by the cold accumulation water tank, and cold accumulation can be carried out through 3 modes: freezing water is injected into the cold accumulation water tank; the metal part of the heat pipe component guides the redundant cold energy in the ventilation room into the cold accumulation water tank; the outer surface of the cold accumulation water tank is naturally ventilated. The chilled water injection can be controlled by a temperature detector and an electric regulating valve in the cold storage water tank. The water temperature in the cold accumulation water tank is kept to be lower than the designed temperature all the year round by the above mode, so that the cold accumulation amount of the cold accumulation water tank is larger than the room cold load within a certain time after power failure.
The passive heat exchange function in the invention is realized by a heat pipe component. When the nuclear power station normally operates and the temperature of the cold accumulation water tank is lower than the indoor temperature of a heat dissipation room, the heat pipes are circularly started, and partial cold load of the heat dissipation room is born through heat exchange of the passive heat pipes, so that the operation energy consumption of the active cooling equipment is saved; when the nuclear power station loses power, the temperature of the heat dissipation room rises to the temperature of the water tank, the heat pipes are started in a circulating mode, the cold storage capacity of the water tank is released to the heat dissipation room through the passive heat exchange of the heat pipes, the highest design temperature of the heat dissipation room within a certain time is maintained, and the requirement for residency of personnel is met.
Drawings
Fig. 1 is a schematic structural view of a passive cold storage type heat exchange device according to embodiment 2 of the present invention;
fig. 2 is a schematic structural view of a heat pipe assembly in embodiment 2 of the present invention;
FIG. 3 is a schematic structural diagram of a single heat pipe in embodiment 2 of the present invention;
fig. 4 is a schematic structural view of the cold storage water tank in embodiment 2 of the present invention.
In the figure: 1-heat dissipation room; 2-ventilating the room; 3-cold storage water tank; 4-a heat pipe assembly; 5-an evaporation section; 6-a condensation section; 7-an adiabatic section; 8-a heat pipe; 9-an upper support plate; 10-a lower support plate; 11-a flange; 12-a reinforcement plate; 13a,13 b-shim; 14a,14b,14 c-bolt; 15-a base plate; 16-embedding channel steel; 17-inner copper tube; 18-outer layer steel pipe; 19-liquid working medium; 20-flange holes; 21-welding seams; 22-floor slab; 23-a water inlet; 24-a water inlet pipe; 25-a water discharge opening; 26-a drain pipe; 27-an overflow port; 28-an overflow pipe; 29-fire water interface; 30-fire-fighting connecting pipe; 31-a vent; 32-a temperature detector; 33-electric regulating valve.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
Example 1
This embodiment provides a passive cold-storage type heat transfer device, includes: treat refrigerated heat dissipation room, heat pipe subassembly, cold-storage water tank, ventilation room, the ventilation room is adjacent with the heat dissipation room and separates through the floor, and the ventilation room sets up in heat dissipation room top, and the heat pipe subassembly includes: at least two heat pipes for transferring heat, the heat pipes are used for holding liquid working medium, and the heat pipes comprise: the heat pipe penetrates through a floor between a ventilation room and a heat dissipation room, the heat insulation section is arranged in the floor, the evaporation section is arranged in the heat dissipation room, the condensation section is arranged in a cold accumulation water tank, the cold accumulation water tank is used for introducing cooling water to accumulate cold for liquid working media in the heat pipe, and the cold accumulation water tank is arranged in the ventilation room. After internal and external power supplies of all nuclear power plants are lost, the temperature of a heat dissipation room is kept not to exceed a design value within a certain time only by means of water cold storage and heat pipe passive heat conduction. The liquid working medium in the evaporation section is heated and evaporated in the main control chamber, the heat insulation section is in a heat insulation state in the floor slab, and the liquid working medium in the condensation section is cooled and condensed in the cold storage water tank.
The cold accumulation function of the heat exchange device in the embodiment is realized by the cold accumulation water tank, and cold accumulation can be carried out through 3 modes: freezing water is injected into the cold accumulation water tank; the metal part of the heat pipe component guides the redundant cold energy in the ventilation room into the cold accumulation water tank; the outer surface of the cold accumulation water tank is naturally ventilated. The chilled water injection can be controlled by a temperature detector and an electric regulating valve in the cold storage water tank. The water temperature in the cold accumulation water tank is kept to be lower than the designed temperature all the year round by the above mode, so that the cold accumulation amount of the cold accumulation water tank is larger than the room cold load within a certain time after power failure.
The passive heat exchange function in this embodiment is realized by a heat pipe assembly. When the nuclear power station normally operates and the temperature of the cold accumulation water tank is lower than the indoor temperature of a heat dissipation room, the heat pipes are circularly started, and partial cold load of the heat dissipation room is born through heat exchange of the passive heat pipes, so that the operation energy consumption of the active cooling equipment is saved; when the nuclear power station loses power, the temperature of the heat dissipation room rises to the temperature of the water tank, the heat pipes are started in a circulating mode, the cold storage capacity of the water tank is released to the heat dissipation room through the passive heat exchange of the heat pipes, the highest design temperature of the heat dissipation room within a certain time is maintained, and the requirement for residency of personnel is met.
Example 2
As shown in fig. 1 to 4, the present embodiment provides a passive cold storage type heat exchanger, including: treat refrigerated heat dissipation room 1, heat pipe subassembly 4, cold-storage water tank 3, ventilation room 2 is adjacent with heat dissipation room 1 and separates through floor 22, and ventilation room 2 sets up in heat dissipation room 1 top, and heat pipe subassembly 4 includes: at least two heat pipes 8 for transferring heat, heat pipes 8 are used for holding liquid working medium 19, and heat pipes 8 include: the heat pipe 8 penetrates through a floor 22 between a ventilation room 2 and a heat dissipation room 1, the heat insulation section 7 is arranged in the floor 22, the evaporation section 5 is arranged in the heat dissipation room 1, the condensation section 6 is arranged in the cold accumulation water tank 3, the cold accumulation water tank 3 is used for introducing cooling water to accumulate cold for a liquid working medium 19 in the heat pipe 8, and the cold accumulation water tank 3 is arranged in the ventilation room 2. Specifically, the heat dissipation room 1 to be cooled in this embodiment is a main control room, the heat pipe assembly 4 is a gravity type heat pipe assembly, the heat pipe 8 is installed on the roof of the heat dissipation room 1, the evaporation section 5 of the heat pipe 8 is located in the upper space of the heat dissipation room 1, the condensation section 6 is located at the bottom of the cold storage water tank 3, and the heat insulation section 7 is fixed in the floor slab 22 through a steel structure frame. After all power supplies inside and outside the nuclear power plant are lost, the room temperature of the heat dissipation room 1 is kept not to exceed the design value within a certain time only by means of water cold storage and passive heat conduction of the heat pipes 8.
Through such an arrangement mode, the unidirectional property of heat conduction of the heat pipe 8 can be realized by utilizing gravity, namely, the heat of the room in the heat dissipation room 1 is easily led into the cold storage water tank 3, and the heat of the cold storage water tank 3 is difficult to enter the room in the heat dissipation room 1. Meanwhile, the heat pipe 8 connects the cold storage water tank 3 and the heat dissipation room 1 into an integral heat transfer unit, so that the heat inertia of the room 1 in the heat dissipation room is greatly increased, the temperature peak value and fluctuation amplitude of the room 1 in the heat dissipation room are far smaller than those of the outdoor, and the passive safety of the room 1 in the heat dissipation room against heat influence is improved.
Specifically, the liquid working medium 19 for the heat pipe 8 is water or a refrigerant. Floor 22 is a concrete floor.
As shown in fig. 3, it is preferable that the heat pipe 8 includes: an inner layer copper pipe 17 and an outer layer steel pipe 18 arranged outside the inner layer copper pipe 17. The inner layer copper pipe 17 ensures the compatibility with the working medium, no matter water or refrigerant is adopted, non-condensable gas can not be generated in the working process, and the service life of the heat pipe 8 is prolonged. The outer layer steel tube 18 of stainless steel ensures the mechanical processing, corrosion resistance and earthquake resistance of the heat pipe 8.
As shown in fig. 4, it is preferable that the cold storage water tank 3 includes: the water tank comprises a water tank body, a water inlet 23 for water inlet, a vent 31 for ventilation, an overflow port 27 for overflow and a drain port 25 for draining, wherein the water inlet 23, the vent 31, the overflow port 27 and the drain port are arranged on the water tank body. Specifically, the water inlet 23 is arranged at the top of the water tank body and used for receiving a factory building chilled water system. The vent 31 is provided at the highest position of the tank body. An overflow port 27 and a drain port 25 which are used for connecting a drainage system of a factory building. The water inlet 23 is connected with a chilled water inlet pipe 24, the drain opening 25 is connected with a drain pipe 26, and the overflow opening 27 is connected with an overflow pipe 28.
Preferably, the cold storage water tank 3 further includes: a fire-fighting water port 29 with a preset water level arranged on the water tank body. The fire-fighting water interface 29 is used for connecting an iodine adsorber in the emergency filtering system of the heat dissipation room 1, and the cold storage water tank 3 in the embodiment can provide fire-fighting water for the iodine adsorber in the emergency filtering system of the heat dissipation room 1 nearby, so that the water requirement in case of fire is ensured, and the factory building fire-fighting system is simplified. The fire service water connection 29 is connected to a fire service connection 30. According to a single fault criterion, the simultaneous occurrence of fire and power loss is not considered, so that part of water in the cold storage water tank 3 can be used as standby fire-fighting water, the iodine adsorber of the emergency fresh air filtering system in the heat dissipation room 1 is generally arranged at the lower layer of the heat dissipation room 1, passive water injection can be realized by utilizing the height difference of the cold storage water tank 3, the fire is efficiently and rapidly extinguished, and the investment is less compared with that of a factory building centralized fire-fighting system due to the short pipeline distance.
Preferably, the passive cold storage type heat exchanger further includes: the water heater comprises a temperature detector 32 arranged in a water tank body, a water inlet pipe 24 connected with a water inlet 23 and an electric regulating valve 33 arranged on the water inlet pipe 24, wherein the temperature detector 32 is electrically connected with the electric regulating valve 33, and when the water temperature detected by the temperature detector 32 is higher than the upper limit of a design value, the electric regulating valve 33 is interlocked and opened; when the water temperature detected by the temperature detector 32 is higher than the design lower limit, the electric control valve 33 is closed by interlocking. Specifically, the temperature detector 32 in this embodiment is a temperature sensor, the temperature sensor is further connected to an external instrument control system, and the temperature sensor is a continuous quantity instrument.
As shown in fig. 2, it is preferable that the heat pipe assembly 4 further includes: go up backup pad 9, pre-buried channel-section steel 16, go up backup pad 9 and set up on cold-storage water tank 3's bottom plate 15, heat pipe 8 and last backup pad 9 bolt fixed connection, pre-buried channel-section steel 16 is pre-buried in floor 22, goes up backup pad 9 and pre-buried channel-section steel 16 fixed connection.
Preferably, the heat pipe assembly 4 further comprises: the lower supporting plate 10, lower supporting plate 10 and pre-buried channel steel 16 fixed connection. The lower support plate 10 is in contact connection with the heat pipe 8 only, and serves to restrict horizontal displacement of the distal end of the heat pipe 8, so that the heat pipe 8 can be repaired and replaced on the cold storage water tank 3 side.
Preferably, the heat pipe assembly 4 further comprises: the flange 11, the heat pipe 8 is connected with the flange 11, and the heat pipe 8 is fixed on the upper supporting plate 9 through the flange 11. Specifically, a welding seam 21 is reserved between the flange 11 and the heat pipe 8, the flange 11 is welded and fixed on the heat pipe 8 through the welding seam 21, a flange hole 20 is formed in the flange 11, a bolt hole is formed in the upper supporting plate 9, a bolt 14a penetrates through the flange hole 20 and the bolt hole, a gasket 13 is further arranged between the flange 11 and the upper supporting plate 9, a nut is locked, the flange 11 is in threaded connection with the upper supporting plate 9, the heat pipe 8 is fixed on the upper supporting plate 9 through the bolt 14a and the gasket 13a, and the heat insulation section 7 of the heat pipe 8 is fixed in a hole 22 of the floor slab. The upper supporting plate 9 is fixed on the embedded channel steel 16 through the bolt 14b and the gasket 13b, and the upper supporting plate 9 is in threaded connection with the embedded channel steel 16. The lower support plate 10 is fixed on the embedded channel steel 16 through bolts 14c, and the lower support plate 10 is screwed with the embedded channel steel 16. Because the service life of the heat pipe 8 is shorter than the service life of the nuclear power station, the structure adopts a welding mode as few as possible, and the convenience of installation, maintenance and replacement of the heat pipe assembly 4 and the single heat pipe 8 is ensured through the bolt connection between the components. Specifically, the gasket 13 in this embodiment is a watertight gasket.
Preferably, the heat pipe assembly 4 further includes a reinforcing plate 12 connected to the upper support plate 9, and in order to meet the requirement of shock resistance, the reinforcing plate 12 is welded to the upper support plate 9 to improve the bending resistance.
Preferably, the heat dissipation room 1 is any one or more of a main control room, an electrical equipment room, an instrument control equipment room, a reactor containment, a diesel generator hall and a wind pipe.
Preferably, the heat pipes 8 are arranged in an array. The length of the single heat pipe 8 is less than 2m, so that the heat pipe can be ensured to have smaller starting temperature difference and higher heat transfer efficiency, can stably work in transition seasons and when power is lost, and simultaneously meets the requirements of energy conservation and safety. Particularly, when a power loss accident just occurs, the cold load of the room of the heat dissipation room 1 is still at a peak value in a short time, and the heat transfer coefficient of the heat pipe 8 is increased along with the increase of the temperature difference, so that the capacity of digesting the peak load is stronger compared with other passive cooling modes with fixed heat transfer coefficients.
The cold accumulation function of the heat exchange device in the embodiment is realized by the cold accumulation water tank 3, and cold accumulation can be carried out through 3 modes: chilled water is injected into the cold accumulation water tank 3 through the water inlet 23; the metal part of the heat pipe component 4 guides the redundant cold energy in the ventilation room 2 into the cold accumulation water tank 3; the outer surface of the cold accumulation water tank 3 is naturally ventilated. The chilled water injection can be controlled by a temperature detector 32 and an electric control valve 33 in the cold storage water tank 3. The water temperature in the cold accumulation water tank 3 is kept to be lower than the design temperature all the year round by the above mode, so that the cold accumulation amount of the cold accumulation water tank 3 is larger than the room cold load within a certain time after power failure.
The passive heat exchange function in this embodiment is realized by the heat pipe assembly 4. When the nuclear power station normally operates and the temperature of the cold storage water tank 3 is lower than the indoor temperature of the heat dissipation room 1, the heat pipes 8 are circularly started, and partial room cold load of the heat dissipation room 1 is born through heat exchange of the passive heat pipes 8, so that the operation energy consumption of active cooling equipment is saved; when the nuclear power station loses power, after the room temperature in the heat dissipation room 1 rises to the water tank temperature, the heat pipe 8 starts in a circulating manner, the cold storage capacity of the water tank is released to the heat dissipation room 1 through the passive heat exchange of the heat pipe 8, the highest design temperature in the room in the heat dissipation room 1 within a certain time is maintained, and the requirement for the residents can be met.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. The utility model provides a passive cold-storage type heat transfer device which characterized in that includes: treat refrigerated heat dissipation room, heat pipe subassembly, cold-storage water tank, be used for the ventilation room of ventilation, the ventilation room is adjacent with the heat dissipation room and separates through the floor, and the ventilation room sets up in heat dissipation room top, and the heat pipe subassembly includes: at least two heat pipes for transferring heat, the heat pipes are used for holding liquid working medium, and the heat pipes comprise: the heat pipe penetrates through a floor between a ventilation room and a heat dissipation room, the heat insulation section is arranged in the floor, the evaporation section is arranged in the heat dissipation room, the condensation section is arranged in a cold accumulation water tank, the cold accumulation water tank is used for introducing cooling water to accumulate cold for liquid working media in the heat pipe, and the cold accumulation water tank is arranged in the ventilation room.
2. The passive cold storage type heat exchange device according to claim 1, wherein the heat pipe comprises: the inner layer copper pipe and the outer layer steel pipe are arranged outside the inner layer copper pipe.
3. The passive cold storage type heat exchange device according to claim 1, wherein the cold storage water tank comprises: the water tank comprises a water tank body, a water inlet, a ventilation opening, an overflow opening and a water drainage opening, wherein the water inlet is arranged on the water tank body and used for water inflow, the ventilation opening is used for ventilation, the overflow opening is used for overflow, and the water drainage opening is used for water drainage.
4. The passive cold storage type heat exchange device according to claim 3, wherein the cold storage water tank further comprises: the fire-fighting water port is arranged on the water tank body and is provided with a preset water level.
5. The passive cold-storage type heat exchange device according to claim 3, characterized by further comprising: the water temperature detection device comprises a temperature detector arranged in a water tank body, a water inlet pipe connected with a water inlet and an electric regulating valve arranged on the water inlet pipe, wherein the temperature detector is electrically connected with the electric regulating valve; when the water temperature detected by the temperature detector is higher than the lower limit of the design value, the electric control valve is closed in an interlocking mode.
6. The passive cold storage type heat exchange device according to claim 1, wherein the heat pipe assembly further comprises: go up backup pad, pre-buried channel-section steel, go up the backup pad and set up on cold-storage water tank's bottom plate, the heat pipe is connected with last backup pad, and pre-buried channel-section steel is pre-buried in the floor, goes up backup pad and pre-buried channel-section steel fixed connection.
7. The passive cold storage type heat exchange device according to claim 6, wherein the heat pipe assembly further comprises: the lower supporting plate is fixedly connected with the embedded channel steel, and the heat pipe is only in contact connection with the lower supporting plate.
8. The passive cold storage type heat exchange device according to claim 6, wherein the heat pipe assembly further comprises: the heat pipe is connected with the flange and is fixed on the upper supporting plate through the flange.
9. The passive cold-storage heat exchange device according to any one of claims 1 to 8, wherein the heat-dissipating room is one or more of a master control room, an electrical equipment room, an instrument control equipment room, a reactor containment, a diesel generator hall, and an air duct.
10. The passive cold-storage heat exchanger according to any one of claims 1 to 8, wherein the heat pipes are arranged in an array.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346554.9A CN112611244B (en) | 2020-11-26 | 2020-11-26 | Passive cold accumulation type heat exchange device |
| GB2306661.6A GB2615269A (en) | 2020-11-26 | 2021-11-18 | Passive cold storage heat exchanger |
| PCT/CN2021/131392 WO2022111371A1 (en) | 2020-11-26 | 2021-11-18 | Passive cold storage heat exchanger |
| ZA2023/05604A ZA202305604B (en) | 2020-11-26 | 2023-05-24 | Passive cold storage heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011346554.9A CN112611244B (en) | 2020-11-26 | 2020-11-26 | Passive cold accumulation type heat exchange device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112611244A true CN112611244A (en) | 2021-04-06 |
| CN112611244B CN112611244B (en) | 2022-10-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011346554.9A Active CN112611244B (en) | 2020-11-26 | 2020-11-26 | Passive cold accumulation type heat exchange device |
Country Status (4)
| Country | Link |
|---|---|
| CN (1) | CN112611244B (en) |
| GB (1) | GB2615269A (en) |
| WO (1) | WO2022111371A1 (en) |
| ZA (1) | ZA202305604B (en) |
Cited By (3)
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| CN114060979A (en) * | 2021-10-26 | 2022-02-18 | 中国核电工程有限公司 | Passive ventilation cooling system |
| CN114383229A (en) * | 2021-12-03 | 2022-04-22 | 中国核电工程有限公司 | Dual-purpose hollow rib plate for cold accumulation and heat exchange and room system |
| WO2022111371A1 (en) * | 2020-11-26 | 2022-06-02 | 中国核电工程有限公司 | Passive cold storage heat exchanger |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB202306661D0 (en) | 2023-06-21 |
| CN112611244B (en) | 2022-10-11 |
| GB2615269A (en) | 2023-08-02 |
| ZA202305604B (en) | 2024-03-27 |
| WO2022111371A1 (en) | 2022-06-02 |
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