• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A passive water / air combined water supply cooling apparatus which comprises a water-cooled heat exchanger (210) connected within a containment building (10) for cooling the heat of a heat generator steam (20), a cooling tank (220) which stores cooling water and condenses steam generated by the steam generator (20), a vapor evaporation pipe (230), wherein s' flows from the steam, the pipe (230) being connected to the cooling tank (220), an air-cooled heat exchanger (240) connected to the pipe (230) which cools and liquefies the steam flowing in the pipe (230), and a condensed water collecting pipe (250) for replenishing the cooling tank (220) with liquefied vapor by the air-cooled heat exchanger (240).
    公开号:FR3017982A1
    申请号:FR1456645
    申请日:2014-07-10
    公开日:2015-08-28
    发明作者:Tae-Soon Kwon；Kihwan Kim；Hyun Sik Park；Sung Won Bae；Yusun Park
    申请人:Korea Atomic Energy Research Institute KAERI；
    IPC主号:
    专利说明:

    [0001] The present invention relates to passive water-air combined water-air cooling apparatus and system, and more particularly to passive water-air combined water-supply cooling apparatus and system for efficient cooling, condensing steam and water. cooling water, generated by water cooling, by means of air cooling, and again supplying it as cooling water for a heat exchanger of a passive cooling system fed with water. After a light water reactor accident involving a safety system configured as an active pump driven by electricity, when a water supply system is not operating, residual heat from a nuclear reactor is removed by driving an auxiliary pump with water supply via a steam generator. On the other hand, there is a passive auxiliary cooling system with water supply that does not require electricity and removes residual heat from a nuclear reactor via a steam generator as a passive device for natural circulation force.
    [0002] Referring to Figure 1, as a model of a general auxiliary passive water supply system has a structure in which, when cooling water in a heat exchange cooling tank (PCCT: "Passive Containment Cooling Tank (or passive containment cooling tank) 1 located outside a reactor containment building end, steam generated 2 is discharged into the air, the cooling capacity of the general auxiliary passive power system water is lost after all the cooling water of the heat exchange cooling tank (PCCT) 1 is evaporated. A cooling period of the auxiliary passive water supply system is generally designed to have a cooling capacity of 8 hours for reference. However, after the Fukushima nuclear accidents, it is necessary for a nuclear reactor cooling system to have a cooling capacity of about 72 hours.
    [0003] To significantly extend the cooling period of a general passive water supply system from 8 hours to 72 hours or more, it is necessary to design a volume of a cooling tank of the passive water supply system so that it is significantly more important. Therefore, it is necessary not only to increase the volume of a water tank but also to design solid support structures for the water tank to withstand earthquakes.
    [0004] Similarly, an auxiliary water supply system using a pump is subject to possible failure due to operator error, power failure, pump malfunction. To overcome such limitations, an auxiliary passive water supply cooling system is provided, capable of increasing safety and economic feasibility by passively cooling the waste heat of a nuclear reactor through the condensation of water. steam generated from a secondary side of a steam generator when a nuclear reactor accident occurs. For example, there is Korean Patent Application No. 100261752 and Korean Patent Publication No. 20010076565, comprising a vertical insulation condenser of a boiling water reactor, an insulation condenser tank comprising cooling water which can be heat exchanged with the insulation condenser, a pipe connecting a steam generator to the insulation condenser, and a make-up water tank.
    [0005] However, the general auxiliary passive water supply cooling systems for a light water nuclear reactor have limitations, such as replenishing a cooling water tank of an auxiliary passive water supply system. cooling after all of the cooling water of the heat exchange cooling tank (PCCT) 1 is evaporated or the design of a cooling water tank to be significantly larger. Due to the limitations, it is necessary to provide a combined water / air water-supply cooling system extending the period before the exhaustion of cooling water by replenishing a cooling tank of a passive water supply system with evaporated steam from the cooling tank and vented to the air. Cited Invention 1: Korean Patent Registration No. 10-0261752 Invention Cited 2: Korean Patent Publication No. 2001-0076565 The object of the embodiments of the present invention is to provide a passive combined water cooling apparatus and system. water supply air extending the period before the cooling water is exhausted by cooling evaporated cooling water vapor from a cooling tank of a general passive water supply system into the air through an air-cooled heat exchanger and recirculating steam to the cooling tank. According to one aspect of the present invention, a passive combined water / air water-supply cooling apparatus is provided. It comprises a water-cooled heat exchanger connected inside a containment building for cooling the heat of a steam generator using a water cooling method, a cooling tank comprising the heat exchanger. water-cooled heat therein and storing cooling water condensing from the main steam generated by the steam generator, a steam evaporation pipe, into which water vapor flows from cooling generated by the water-cooled heat exchanger in the cooling tank, the vapor evaporation pipe being connected to the cooling tank, an air-cooled heat exchanger connected to the vapor evaporation and cooling pipe and liquefying the steam flowing in the vapor evaporation pipe, and a condensed water collecting pipe for replenishing the e liquefied steam cooling tank by the air-cooled heat exchanger.
    [0006] The cooling tank may be formed of a pressure vessel. The air-cooled heat exchanger may comprise a radiator receiving cooling water vapor, generated in the cooling tank, via the vapor evaporation pipe and emitting heat to the outside . The air-cooled heat exchanger may be formed of a horizontal heat exchange condenser tube. The horizontal heat exchange condenser tube may be formed of a heat exchange tube including a cooling fin to increase the heat emission efficiency. The air-cooled heat exchanger may be formed with a pipe to emit a non-condensed gas. The pipe for emitting the uncondensed gas may be exposed outwardly at an upper pipe of the radiator.
    [0007] The radiator may be formed of at least two vertical pipes and at least two horizontal pipes crossing one another. The horizontal pipes may be tilted to allow the condensed vapor to flow to the condensed water collection pipe. The condensed cooling water may be allowed to flow into the extended vertical pipes from the condensed water collection pipe due to inclination. The condensed water collection pipe, to prevent flow back to the condensate collection pipe, may have an outlet located below a highest location of the water-cooled heat exchanger. . According to another aspect of the present invention, a passive water supply cooling system is provided. It includes a water-cooled heat exchanger located outside a containment building and connected inside the containment building to cool the heat of a steam generator using a water cooling process. a cooling tank located outside the containment building, comprising the water-cooled heat exchanger therein and storing cooling water condensing the main steam generated by the steam generator, a vapor evaporation pipe, into which the steam of the cooling water generated by the water-cooled heat exchanger in the cooling tank flows, the vapor evaporation pipe being connected to the reservoir cooling, an air-cooled heat exchanger connected to the vapor evaporation pipe and cooling and liquefying the steam flows in the vapor evaporation pipe, a condensed water collection pipe for replenishing the liquefied vapor cooling tank by the air-cooled heat exchanger, an air induction duct formed at the outside of the air-cooled heat exchanger and formed of a hollow pipe comprising an air inlet and an air outlet for inducing an air flow outside the water-cooled heat exchanger air, and a cooling air blower installed inside the air induction duct and forcibly generating an air flow, the passive water-supply cooling systems being formed on four sides of the air-intake building. confinement, respectively. The cooling air blower may be located on an upper end within the air induction duct. The cooling air blower may be located at a lower end within the air induction duct. The cooling air blower may be located centrally inside the air induction duct. The cooling air blower may be selectively formed in at least two locations selected from the upper end, the lower end, and the medium within the air induction duct. The air induction duct may be extended in a horizontal direction relative to a floor surface. The air induction duct may comprise an electric fan generating an air flow and a drive unit for driving the electric fan. The electric fan may comprise at least three rotors. Also, to naturally circulate the air when the drive unit is not operating, the electric fan may have a total projected cross-sectional area of the rotors less than about 1/3 of a cross-sectional area of the rotor. air induction duct. The drive unit may be formed of a motor. The foregoing and other objects, features and advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG. 1 is a cross-sectional view of a general auxiliary passive cooling system with water supply; Figure 2 is a vertical cross-sectional view of a water / air combined water / air cooling apparatus according to one embodiment of the present invention; Fig. 3 is an enlarged view of an air-cooled heat exchanger of the water-air combined water / air cooling apparatus of Fig. 2; Fig. 4 is a vertical cross sectional view of a water / air combined water / air cooling system according to an embodiment of the present invention; Fig. 5 is a horizontal cross-sectional view of the water / air combined water / air cooling system of Fig. 4; Fig. 6A is a view of a rotating electric fan of the water / air combined water / air cooling system of Fig. 4; Fig. 6B is a view of a stopped electric fan of Fig. 6A; Fig. 7 is a vertical cross-sectional view illustrating a state, in which a cooling air blower of the water / air combined water / air cooling system of Fig. 4 is installed on a lower end of a air induction duct for being vertical relative to a surface of the ground; Figure 8 is a vertical cross-sectional view illustrating a state in which the cooling air blower of Figure 7 is installed on the bottom of the air induction duct to be horizontal with respect to the surface of the air intake duct. ground ; Fig. 9 is a graph illustrating a thermal load on a nuclear reactor according to a period of operation of the water / air combined water / air cooling system of Fig. 4; and Fig. 10 is a graph illustrating an operating period and a cooling water level according to a heat-removal capacity of the air-cooled heat exchanger of the passive water-to-air combined cooling system. Figure 4. Hereinafter, illustrative embodiments of the present invention will be described in detail with reference to the accompanying drawings. Herein, configurations and operations illustrated in the drawings and described with reference to them are just at least one embodiment. However, the technical scope and essential configurations and operations of the present invention are not limited thereto. As used herein, terms used for functions are commonly used generic terms. However, they may vary with the intent of the skilled person, the practice, or the advent of new technologies. Also, particularly, certain terms herein are arbitrarily selected by the applicant (s). In this case, their meaning will be described in detail. Therefore, the terms used herein are not mere specific designations but will be defined in terms of their meaning and contents throughout the present application.
    [0008] The present invention provides a passive water-cooled cooling system comprising a water-cooled heat exchanger located outside a containment building to be connected to the interior of the containment building and to cool a generator of water. steam using a water cooling process, a cooling tank, located outside the containment building, including the water-cooled heat exchanger therein, and storing cooling water to condense the main steam generated by the steam generator, a vapor evaporation pipe connected to the cooling tank to allow cooling water vapor generated by the water-cooled heat exchanger to flow into the this, an air-cooled heat exchanger to cool the steam flowing in the evaporation pipe of steam to liquefy steam, a condensed water collection pipe for replenishing the liquefied vapor cooling tank by the air-cooled heat exchanger, an air induction duct formed outside the liquefied vapor cooling tank air-cooled heat exchanger, which is a hollow pipe comprising an air inlet and an air outlet, for inducing an air flow outside the air-cooled heat exchanger, and a cooling air blower installed in the air induction duct to forcibly generate an air flow. The passive water supply cooling system provides passive water / air combined water supply cooling systems formed on four sides of the containment building, respectively. Hereinafter, it will be described in detail with reference to the accompanying drawings. Fig. 2 is a vertical cross-sectional view of a water / air combined water / air cooling apparatus according to one embodiment of the present invention. Referring to FIG. 2, the water-to-water combined passive water-cooling apparatus may comprise a water-cooled heat exchanger 210, a cooling tank 220, a vapor evaporation pipe 230 an air-cooled heat exchanger 240, a condensed water collection pipe 250, an air induction duct 260, and a cooling air blower 270. A containment building 10 prevents a reactor 20 nuclear power to cause a high indoor temperature and prevents radioactive materials from being vented into the air. A steam generator 20 is formed within the containment building 10. Main steam is condensed by the water-cooling heat exchanger 210 into the cooling tank 220 and flows into the steam generator 20. The evaporated main steam is discharged through a steam pipe 40. The main steam may be a coolant flowing through the steam generator 20, the steam pipe 40, water-cooled heat exchanger 210, and the water supply pipe 30. The cooling water heat exchanger 210 is connected between the water supply pipe 30 and the steam pipe 40 to condense the main steam flowing through the steam pipe 40. The main steam is condensed by the cooling water into the cooling tank 220. The main steam condensed by the heat exchanger The water-cooled steamer 210 can flow back into the steam generator through the water supply pipe 30. A method of condensing steam using cooling water is a water cooling process, which cools rapidly, but cooling is not possible when cooling water in a cooling tank is exhausted. The cooling tank 220 may be a container storing cooling water. The cooling tank 220 cools the heat generated by the water-cooled heat exchanger 210 using cooling water stored therein. Because of this, the cooling water can evaporate. The cooling tank 220 may be formed with a lid at the top thereof to prevent steam generated from the cooling tank 220 from being exhausted to the outside. The cooling tank 220 may be a pressure vessel available at a more than constant pressure. Due to the structure described above, the steam generated from the cooling tank 220 is not discharged to the outside and can, for the most part, flow into the vapor evaporation pipe 230. The vapor evaporation pipe 230 may be inserted with the steam generated from the cooling tank 220. The vapor evaporation pipe 230 is installed on the top of the cooling tank 220 and is connected to the heat exchanger The cooling vapor generated from the cooling tank 220 can flow into the air-cooled heat exchanger 240 because of the pressure of the cooling vapor. The air-cooled heat exchanger 240 may be a radiator for radiating outward the heat of the cooling vapor flowing from the vapor evaporation pipe 230. The radiator is an apparatus for emit heat to the outside. To effectively achieve the emission, the radiator may comprise a structure formed with a large area. Steam may flow from the vapor evaporation pipe 230 to the air-cooled heat exchanger 240. However, when a large amount of steam flows from the vapor evaporation pipe 230 , the design must provide that the pressure of the air-cooled heat exchanger 240 is high. In this case, there are limitations of stability and manufacturing costs.
    [0009] Therefore, to prevent a significant increase in pressure in the air-cooled heat exchanger 240 driven by steam flowing from the vapor evaporation pipe 230, a portion of an upper pipe of the heat exchanger An air-cooled heat sink 240 (hereinafter referred to as an opening portion 247) may be exposed to the outside in air. Due to a configuration of the air-cooled heat exchanger 240 as described above, steam with excessive pressure and some uncondensed portion of a non-condensed gas can be discharged to the outside through the opening portion 247. An orifice is formed on the opening portion 247 of the air-cooled heat exchanger 240 to form an air-exposed area to be controllable. Hereinafter, it will be described in detail with reference to FIG. 3. The air-cooled heat exchanger 240 is formed with a plurality of vertical pipes 243 and a plurality of horizontal pipes 245 intersecting each other. . The plurality of horizontal pipes 245 may be inclined to allow liquefied cooling water vapor, which is condensed in water, into the air-cooled heat exchanger 240 to flow through the horizontal pipes 245. for replenishing the cooling tank 220 via the condensed water collecting pipe 250. The inclination may be at an angle of about -3 degrees to be suitable for allowing the liquefied cooling water vapor into the air-cooled heat exchanger 240 to flow through the horizontal pipes 245 and to flow into the condensed water collection pipe 250.
    [0010] The plurality of horizontal pipes 245 may include a plurality of vanes to enlarge an outwardly exposed contact area. One of the vertical pipes 243 can be extended to be connected to the condensate collection pipe 250. The condensed water can flow into the extended pipe of the vertical pipes 243, connected to the condensed water collection pipe 250, in Because of the inclination of the plurality of horizontal pipes 245. The condensed water collection pipe 250 is extended from the air-cooled heat exchanger 240 to the cooling tank 220. The condensed water collection pipe 250 is configured not to allow steam generated from the cooling tank 220 to flow into the air-cooled heat exchanger 240 through the condensed water collection pipe 250 when the steam generated from of the cooling tank 220 flows into the air-cooled heat exchanger 240 through the vapor evaporation pipe 230. To prevent a return flow, a pipe outlet The condensed water collection unit 250 may be located below a lowest free water surface of the cooling water in the cooling tank 220. Here, a cooling water charge height located in the condensed water collection pipe 250 is formed to be greater than the resistance of the vapor evaporation pipe 230 which is a connection point between the cooling tank 220 and the air-cooled heat exchanger 240, preventing thus, the cooling water vapor returns to the air-cooled heat exchanger 240 through the condensed water collection pipe 250. In the configuration described above, the outlet of the water collection pipe condensate 250 may be located below the lowest free water surface of the cooling water in the cooling tank 220. When the outlet of the condensed water collection pipe 250 is located above With the lowest free water surface area of the cooling water in the cooling tank 220, the cooling water vapor generated by the water-cooled heat exchanger 210 can flow to the back to the air-cooled heat exchanger 240 through the condensed water collection pipe 250. The air induction duct 260 can increase the efficiency of the natural circulation air cooling during the cooling of the air-cooled heat exchanger 240. air-cooled heat exchanger 240. The air-cooled heat exchanger 240 is located in the air induction duct 260. The air induction duct 260 may have a hollow pipe shape, formed with an air inlet and an air outlet at the top and bottom thereof, respectively, and may conform to an outer wall of the containment building 10. Due to the configuration of a chimney described herein above and In the heat of the air-cooled heat exchanger 240, a chimney effect may occur in the air induction duct 260, which forms an upward flow of air from the induction duct. Due to an updraft generated by the chimney effect, the natural circulation cooling of the air-cooled heat exchanger 240 can be realized quickly. The cooling air blower 270 comprises a drive unit 273 and an electric blower 275. It is possible to forcibly generate the updraft in the air induction duct 260 through the electric blower 275. installed in a path of the air induction duct 260. This allows a larger amount of naturally ascending air to flow, thereby increasing the cooling efficiency of the heat exchanger at 240. The electric fan 275 may be driven by the drive unit 273. The drive unit 273 may be a motor. Hereinafter, the electric fan 275 will be described in detail with reference to FIG. 6. FIG. 4 is a vertical cross-sectional view of a water / air combined water / air cooling system in a single mode. embodiment of the present invention. Referring to FIG. 4, the air induction duct 260 of the water / air combined passive water / air cooling system comprises an air inlet and an air outlet. The air inlet is formed on a bottom of the air induction duct 260 in the form of a hollow pipe vertically formed with respect to a surface of the ground. The outlet is formed at the top of the air induction duct 260. At least one cooling air blower 270 may be formed in the air induction duct 260. Here, the air inlet may be formed on the bottom of the air induction duct 260 in a horizontal direction relative to the ground surface. The cooling air blower 270 may be formed in the air inlet in the horizontal direction. The cooling air blower 270 may be installed at any one of an upper end, a lower end, and the middle of the air induction duct 260. Preferably, the cooling air blower 270 may be installed on the lower end of the air induction duct 260 but is not limited thereto. When the cooling air blower 270 is installed on the lower end of the air induction duct 260, it becomes easy to replace, maintain and repair the cooling air blower 270. FIG. 5 Fig. 4 is a horizontal cross-sectional view of the water-to-water combined water / air combined cooling system of Fig. 4. Referring to Fig. 5, four passive water-air combined water / air cooling systems can be formed. on the outside of the containment building 10. A plurality of passive water / air combined water supply cooling systems can increase the cooling efficiency through a plurality of coolers. When some of the chillers do not work, it is possible to maintain the cooling. To have a capacity of about 100% of the residual heat cooling when one of the four chillers fails, each of the four passive water / air combined water supply cooling systems may have a heat removal capability. more than about 33% of the residual heat emitted from a nuclear reactor in the containment building 10, but not limited thereto. Figs. 6A and 6B illustrate operations of the cooling air blower 270 of the water / air combined passive cooling system with water supply. Referring to FIG. 6A, the cooling air blower 270 may comprise the electric blower 275 and the drive unit 273. The cooling blower 270 is formed in the path of the induction duct 260 air, but not limited thereto. The electric fan 275 is driven by the drive unit 273. The drive unit 273 generates a rotational movement and can be a motor. Due to rotations of the electric fan 275, an updraft generated in the air induction duct 260 may increase. However, when electricity is not supplied due to an accident occurring in the nuclear reactor, the electric fan 275 does not rotate. Here, when the electric fan 275 has a large area, the occurrence of the updraft can be limited. To solve the limitation described above, the area of the electric fan 275 can be reduced. With reference to FIG. 6B, the area of the electric fan 275, to increase the passage of a natural updraft k2 occurring in the air induction duct 260, may be less than about 1/3 of the area. of cross section of the air induction duct 260 but is not limited thereto. Due to the configuration described above, the passive water-to-air combined water supply cooling system can allow for forced circulation by driving the electric fan 275 when electricity is supplied, and can allow natural circulation when electricity is not supplied and the electric fan 275 is not driven. Fig. 7 is a vertical cross-sectional view illustrating a state, in which the cooling air blower 270 of the water / air combined passive cooling system with water supply is installed at the bottom of the air induction duct 260 to be vertical to the ground surface. Referring to Fig. 7, the air-cooled heat exchanger 240 is located in the air induction duct 260. The air induction duct 260 may have a hollow tube shape formed with an air inlet and an air outlet at the top and bottom thereof, respectively, and may be in accordance with an outer wall of the containment building 10. The air induction duct 260 may be extended to allow the air inlet to conform to a shape of the cooling tank 220. The air inlet can be installed to be vertical to the ground surface. Similarly, the cooling air blower 270 may be installed in the air inlet and may be installed to be vertical to the ground surface in a shape of the air inlet. Fig. 8 is a vertical cross-sectional view illustrating a state in which the cooling air blower 270 is installed at the bottom of the air induction duct 260 to be horizontal with respect to the ground surface. Referring to Fig. 8, the air-cooled heat exchanger 240 is located in the air induction duct 260. The air induction duct 260 may have a hollow pipe shape formed with an air inlet and an air outlet at the top and bottom thereof, respectively, and may be in accordance with an outer wall of the containment building 10. The air induction duct 260 may be formed with the air inlet on a top of the cooling tank 220 to be extended in a horizontal direction relative to the ground surface.
    [0011] Similarly, the cooling air blower 270 may be installed in the air inlet and may be installed to be horizontal with respect to the ground surface in a shape of the air inlet. Fig. 9 is a graph illustrating a thermal load on the nuclear reactor in a period of operation of the water / air combined passive water supply cooling system. Referring to FIG. 9, in an initial stage of an accident, high temperature heat is generated in the nuclear reactor and many heat loads are generated due to the high temperature heat. Initially, the heat loads can be quickly cooled by a water cooling system having a large heat removal capacity. In advanced stages of the accident, in which the heat emission decreases, the heat loads can be cooled by an air cooling system having a lower heat removal capacity than the water cooling system. but capable of infinitely cooling without limitation of exhaustion of cooling water, thereby preventing excessive volume increase of a heat exchanger and simultaneously providing a desired cooling capacity. Fig. 10 is a graph illustrating an operating period and a cooling water level according to a heat-removal capacity of the air-cooled heat exchanger of the passive water / air combined cooling system. water.
    [0012] Referring to Fig. 10, when heat of a steam generator is cooled by a water cooled heat exchanger of a cooling tank in a general auxiliary auxiliary cooling system with water supply, when Evaporation of cooling water into the cooling tank starts at a moment XI after an accident occurs and is performed for about 8 hours, all the cooling water is evaporated and the cooling tank runs out of water. However, the water-to-water combined water / air cooling system according to the embodiment condenses evaporated cooling water through an air cooling process to replenish a cooling tank, thereby prolonging a cooling water supply. period before the exhaustion of cooling water. According to an increase of steam condensing capacity of an air cooling heat exchanger of the water / air combined passive water supply cooling system, the period before exhaustion of the cooling water can be increased more, thus exhibiting a period before exhaustion of at least greater than about 72 hours. When condensing 100% of the vapor discharged outward from an air cooling tank into a general auxiliary passive cooling system with water supply for recirculation through the cooling tank, this means that a water level of the cooling water is absolutely not reduced. To have a cooling period capacity greater than about 72 hours, the water-to-water combined passive water cooling system can be configured for an air-cooled heat exchanger to have an appropriate level of condensing capacity. steam. As described above, according to the embodiment, cooling vapor discharged from a cooling tank of a general passive water supply system into the air is condensed by a heat exchanger. air-cooled heat source for replenishing the cooling tank, thereby significantly increasing a cooling period of the general passive water supply system from about 8 hours to more than about 72 hours. Namely, without the design increasing several times the volume of the cooling tank of the general passive system with water supply, the cooling period can be increased significantly to be greater than 72 hours. Therefore, it is possible to simultaneously solve limitations, such as increasing a volume of a cooling tank of a passive water supply system and increasing a wall thickness of a water supply. auxiliary building for a nuclear reactor in accordance with the increase of the volume of the cooling tank.
    [0013] Furthermore, according to the embodiment, as a high pressure limit of the general passive water supply system is perfectly separated from a pressure limit of an air-cooled heat exchanger system, there is no increasing damageable portions of the upper pressure limit of the general water supply system according to an increase of a heat transfer zone of the air-cooled heat exchanger system. Further, according to the embodiment, since it is unnecessary to include a control device, such as a valve or pump, necessary to activate or deactivate an air-cooled heat exchanger, there is no possibility of failure of a corresponding device. When a forced circulation air cooling fan, operating in a state of electricity supply inside and outside a nuclear power plant, is deactivated because electricity is not supplied, such as there is a structure for allowing cooling air to flow naturally through an open area between fan rotors, an active / passive conversion control device is unnecessary. Similarly, since cooling systems are installed on four sides of a containment building, passive water / air combined water supply cooling systems operate independently of each other. Although one of the air outlets is closed and one of the cooling systems does not work, other cooling systems can operate independently.
    [0014] According to the present invention described above, evaporated cooling vapor in the air is condensed by a naturally-circulating air-cooled heat exchanger to replenish a cooling tank, thus prolonging a period before the exhaustion of the cooling tank. cooling water of the cooling tank, for example, so that it is greater than 72 hours. Therefore, it is possible to increase a cooling period without increasing a cooling water capacity of the cooling tank. Since there is no need to increase the cooling water capacity, improved effects can be provided by using small facilities, thereby reducing costs and processes. Regardless of the supply of electricity inside and outside a nuclear power plant, air cooling is continuously performed by a naturally-circulating air-cooled heat exchanger. Although a power failure occurs and an electric fan is disabled, it is possible to switch from forced air cooling through the electric fan to natural circulation air cooling. without operating additional converter, the cooling can be carried out continuously when an accident of a nuclear reactor occurs. An air induction duct for cooling an air-cooled heat exchanger comprises respective air outlets. When one of the air outlets is closed, others can be driven independently of each other. Although preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will understand that various modifications, additions and substitutions are possible without departing from the scope and spirit of the present invention. invention as described in the appended claims.
    权利要求:
    Claims (20)
    [0001]
    REVENDICATIONS1. A passive water / air combined water supply cooling apparatus, comprising: a water cooled heat exchanger (210) connected within a containment building (10) for cooling the heat of a heat generator steam (20) using a water cooling method; a cooling tank (220) including the water-cooled heat exchanger (210) therein and storing cooling water condensing from the main steam generated by the steam generator (20); a vapor evaporation pipe (230) in which cooling water vapor generated by the water-cooled heat exchanger (210) flows into the cooling tank (220), the vapor-evaporation pipe (230) being cooled (220); An air-cooled tank heat exchanger (240) connected to the vapor evaporation pipe (230) and cooling and liquefying the vapor flowing in the vapor evaporation pipe (230); and a condensed water collection pipe (250) for replenishing the cooling tank (220) with liquefied vapor by the air-cooled heat exchanger (240).
    [0002]
    2. Apparatus according to claim 1, wherein the cooling tank (220) is formed of a pressure vessel.
    [0003]
    An apparatus according to claim 1, wherein the air-cooled heat exchanger (240) comprises a radiator receiving cooling water vapor generated in the cooling tank (220) via vapor evaporation pipe (230) and emitting heat to the outside.
    [0004]
    An apparatus according to claim 1, wherein the air-cooled heat exchanger (240) is formed of a horizontal heat exchange condenser tube. 15
    [0005]
    An apparatus according to claim 4, wherein the horizontal heat exchange condenser tube is formed of a heat exchange tube comprising a cooling fin for increasing heat emission efficiency. 20
    [0006]
    Apparatus according to claim 1, wherein the air-cooled heat exchanger (240) is formed with a pipe for emitting a non-condensed gas.
    [0007]
    An apparatus according to claim 6, wherein the pipe for emitting the uncondensed gas is exposed outwardly to an upper pipe of the radiator.
    [0008]
    Apparatus according to claim 3, wherein the radiator is formed of at least two vertical pipes (243) and at least two horizontal pipes (245) crossing one another.
    [0009]
    An apparatus according to claim 8, wherein the horizontal pipes (245) are inclined to allow the condensed vapor to flow to the condensed water collection pipe (250).
    [0010]
    An apparatus according to claim 9, wherein the condensed cooling vapor is allowed to flow into the vertical pipes (243) extended from the condensed water collection pipe (250) due to the inclination.
    [0011]
    An apparatus according to claim 10, wherein the condensed water collecting pipe (250) for preventing return flow to the condensed water collecting pipe (250) has an outlet below a highest location of the water-cooled heat exchanger (210).
    [0012]
    12. A water / air combined water / air cooling system formed of a plurality of passive water supply cooling systems, each comprising: a water-cooled heat exchanger (210) located outside the water supply system; a containment building (10) and connected inside the containment building (10) for cooling heat of a steam generator (20) using a water cooling process; a cooling tank (220) located outside the containment building (10), including the water-cooled heat exchanger (210) therein and storing cooling water condensing the vapor generator generated by the steam generator (20), a vapor evaporation pipe (230) connected to the cooling tank (220), in which steam of the cooling water generated by the heat exchanger flows. water-cooled heat (210) in the cooling tank (220); an air-cooled heat exchanger (240) connected to the vapor evaporation pipe (230) and cooling and liquefying the vapor flowing in the vapor evaporation pipe (230); a condensed water collection pipe (250) for replenishing the cooling tank (220) with liquefied vapor by the air-cooled heat exchanger (240); An air induction duct (260) formed outside the air-cooled heat exchanger (240) and formed of a hollow pipe comprising an air inlet and an air outlet for inducing an airflow outside the air-cooled heat exchanger (240); and a cooling air blower (270) installed within the air induction duct (260) and forcibly generating an air flow, wherein the passive water cooling systems are formed on four sides of the containment building (10), respectively.
    [0013]
    The system of claim 12, wherein the cooling air blower (270) is located on an upper end within the air induction duct (260).
    [0014]
    The system of claim 12, wherein the cooling air blower (270) is located on a lower end within the air induction duct (260).
    [0015]
    The system of claim 12, wherein the cooling air blower (270) is located centrally within the air induction duct (260).
    [0016]
    The system of claim 12, wherein the cooling air blower (270) is selectively formed in at least two locations selected from the upper end, the lower end, and the medium within the duct. induction of air (260).
    [0017]
    The system of claim 12, wherein the air induction duct (260) is extended in a horizontal direction relative to a floor surface.
    [0018]
    The system of claim 12, wherein the air induction duct (260) comprises: an electric fan (275) generating an air flow; and a drive unit (273) for driving the electric fan (275).
    [0019]
    The system of claim 18, wherein the electric fan (275) comprises at least three rotors, and wherein, to naturally circulate air when the drive unit (273) is not operating, the fan The electric motor (275) has a total projected cross-sectional area of the rotors less than about 1/3 of a cross-sectional area of the air induction duct (260).
    [0020]
    20. The system of claim 18, wherein the drive unit (273) is formed of a motor.
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3017982A1|2015-08-28|PASSIVE COOLING APPARATUS AND SYSTEM COMBINED WATER / AIR WITH WATER SUPPLY
    KR101459550B1|2014-11-10|4-Quadrant Air-Water Combined Cooling Passive Feedwater System
    EP0425363B1|1994-07-20|Vapor pump with countercurrent exchanger for air and combustion products without intermediate fluid
    FR2980029A1|2013-03-15|PASSIVE COOLING SYSTEM OF NUCLEAR POWER PLANT
    JP5369258B2|2013-12-18|Energy-saving freshwater production equipment
    US20120269625A1|2012-10-25|System to cool the nacelle and the heat generating components of an offshore wind turbine
    CA2481293A1|2003-10-23|Method and device for the production of electricity from the heat produced in the core of at least one high-temperature nuclear reactor
    US9091249B2|2015-07-28|Integrated cooling and climate control system for an offshore wind turbine
    ES2791493T3|2020-11-04|Thermal heat storage system
    FR3005523A1|2014-11-14|EMERGENCY COOLING TANK COOLING SYSTEM AND NUCLEAR CENTER EQUIPPED WITH THE SAME
    FR2986654A1|2013-08-09|WATER SPRAY RESIDUAL HEAT EXHAUST SYSTEM FOR A NUCLEAR POWER PLANT
    JP5923890B2|2016-05-25|Power generator
    US20150243382A1|2015-08-27|Passive containment air cooling device and system with isolated pressure boundary
    WO2009093979A1|2009-07-30|Method and system of heat capture for hvac
    CN1214223C|2005-08-10|Solar heat harnessing system
    JP2006226540A|2006-08-31|Heating/cooling device
    US20190072332A1|2019-03-07|Vacuum condensation system by using evaporative condenser and air removal system coupled to condensing turbines in thermoelectric plants
    JP6669887B2|2020-03-18|Heat pump with motor cooler
    TWI614401B|2018-02-11|Wind power generator
    JP2008095673A|2008-04-24|Hot water thermal power generator
    JP2007309099A|2007-11-29|Thermal power generation system
    JP2013011182A|2013-01-17|Waste heat power generation device
    KR101902354B1|2018-09-28|Closed Cycle Gas Turbine Power Generation System
    TWI622264B|2018-04-21|Gravity cooling system for use in solar panel
    JP2008190447A|2008-08-21|Solar heat utilizing system
    同族专利:
    公开号 | 公开日
    US10043596B2|2018-08-07|
    KR101499641B1|2015-03-06|
    CN104882169B|2018-07-17|
    FR3017982B1|2019-04-19|
    US20150243383A1|2015-08-27|
    CN104882169A|2015-09-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    IT1135516B|1981-02-18|1986-08-27|Nuovo Pignone Spa|PERFECTED STEAM CONDENSER WITH AIR COOLING|
    JP3159820B2|1993-02-12|2001-04-23|株式会社日立製作所|Reactor containment equipment|
    KR100261752B1|1996-10-26|2000-07-15|윤덕용|Passive secondary loop condensation system for pressurized water reactor|
    KR20010076565A|2000-01-26|2001-08-16|이종훈|Passive Secondary Condensing System|
    US20070028626A1|2003-09-02|2007-02-08|Sharp Kabushiki Kaisha|Loop type thermo siphon, stirling cooling chamber, and cooling apparatus|
    JP2010256322A|2009-03-30|2010-11-11|Mitsubishi Heavy Ind Ltd|Emergency core cooling system and nuclear reactor facility|
    KR101160771B1|2011-01-03|2012-06-28|한국수력원자력 주식회사|Condensation-tank optimization of advanced passive auxiliary feed-water system for pressurized water reactor|
    CN201946323U|2011-01-05|2011-08-24|中科华核电技术研究院有限公司|Emergency water supply system for nuclear power station|
    US20130028365A1|2011-07-29|2013-01-31|Westinghouse Electric Company Llc|Power generation from decay heat for spent nuclear fuel pool cooling and monitoring|
    JP5540362B2|2011-09-29|2014-07-02|日立Ｇｅニュークリア・エナジー株式会社|Reactor cooling system|
    KR101200216B1|2012-02-07|2012-11-09|한국원자력연구원|Water-spray residual heat removal system for nuclear power plant|
    KR20150039858A|2012-08-14|2015-04-13|에스엠알 인벤텍, 엘엘씨|Passively-cooled spent nuclear fuel pool system|CN104361914A|2014-11-19|2015-02-18|中科华核电技术研究院有限公司|Passive safe cooling system|
    JP6650935B2|2016-01-19|2020-02-19|ザ・セクレタリー、デパートメント・オブ・アトミック・エナジー|System, apparatus and method for passive decay heat transport|
    GB2564898A|2017-07-27|2019-01-30|Rolls Royce Power Eng Plc|Cooling system for a nuclear reactor|
    CN109634390A|2018-12-19|2019-04-16|曹书铭|Computer room desktop computer water cooling heat source comprehensive reutilization system and its working method|
    法律状态:
    2015-04-27| PLFP| Fee payment|Year of fee payment: 2 |
    2016-04-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-05-31| PLFP| Fee payment|Year of fee payment: 4 |
    2017-11-10| PLSC| Search report ready|Effective date: 20171110 |
    2018-05-31| PLFP| Fee payment|Year of fee payment: 5 |
    2019-06-25| PLFP| Fee payment|Year of fee payment: 6 |
    2020-06-09| PLFP| Fee payment|Year of fee payment: 7 |
    2021-06-25| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    KR20140023605A|KR101499641B1|2014-02-27|2014-02-27|Air-Water Combined Cooling Passive Feedwater Device and System|
    KR1020140023605|2014-02-27|
    [返回顶部]