CN217640667U - Passive air cooling system applied to containment heat exchange water tank - Google Patents
Passive air cooling system applied to containment heat exchange water tank Download PDFInfo
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- CN217640667U CN217640667U CN202220942386.8U CN202220942386U CN217640667U CN 217640667 U CN217640667 U CN 217640667U CN 202220942386 U CN202220942386 U CN 202220942386U CN 217640667 U CN217640667 U CN 217640667U
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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
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model belongs to the technical field of the nuclear, concretely relates to be applied to passive air cooling system of containment heat transfer water tank. The safety device comprises a heat exchange water tank, wherein the heat exchange water tank is fixed in a protection structure on the outer side of a containment, a heat exchanger is arranged in the heat exchange water tank, the top of the protection structure is provided with an air outlet, and the side surface of the protection structure is provided with an air inlet. The beneficial effects of the utility model reside in that: (1) The heat exchange water tank of the containment is cooled through passive air cooling, so that the heat exchange capacity between the heat exchange water tank and the atmosphere is enhanced, and the heat conduction performance of the heat exchange water tank to the containment is improved; (2) The heat exchange water tank is of a steel structure, and heat exchange fins are arranged, so that the heat exchange performance of the passive air cooling heat exchange water tank is effectively enhanced; (3) The protective structure of the heat exchange water tank can be used as a bearing structure of the water tank, and can resist the impact of external flying objects, so that the safety of the passive heat exchange system of the containment is ensured.
Description
Technical Field
The utility model belongs to the technical field of the nuclear, concretely relates to be applied to passive air cooling system of containment heat transfer water tank.
Background
A Passive Containment Cooling System (PCS) is a safety-related System of AP1000 and hualong one, and an important objective of the System design is to enhance the capability of accident prevention and mitigation and improve the safety of a nuclear power plant. The AP1000 PCS system utilizes a steel containment shell as a heat transfer surface where steam condenses and heats the inner surface, which then transfers heat to the steel containment by conduction. The outer surface of the heated steel shell is subjected to heat transfer mechanisms such as convection heat transfer, radiation heat transfer and phase change heat transfer (water evaporation) of media (water and air), and heat is brought out through the naturally circulating air through the high-position exhaust port in the forms of sensible heat and latent heat of evaporation, so that the cooling of the containment is finally realized. The Hualong I reactor type PCS system takes heat in a containment vessel to a heat exchange water tank arranged outside the containment vessel through a heat exchanger, the temperature of the heat exchange water tank reaches saturation temperature under corresponding pressure along with the continuous rising of water temperature in the heat exchange water tank, and partial steam is removed to finally enter atmosphere. The AP1000 and Hualong I reactor type PCS system can ensure that the pressure and the temperature in the containment vessel of the nuclear power station are controlled within a design range within 72 hours of accident conditions, and the cooling of the reactor core and the integrity of the containment vessel are ensured.
The PCS system and the PRS system of the Hualong I reactor share the heat exchange water tank, the heat of the containment vessel and the waste heat of the secondary side are discharged through the low-temperature water heat exchange in the heat exchange water tank, and the heat is finally discharged into the atmosphere through the water vaporization in the water tank along with the continuous rising of the water temperature in the heat exchange water tank. Compared with the AP1000 PCS system, the Hualong I reactor type PCS and PRS system is in the process of leading out the heat of the containment and the waste heat of the secondary side, but because the heat discharge capacity of the water tank is relatively weak, the temperature of water in the heat exchange water tank is continuously increased due to rapid heat absorption, the cooling function of the heat exchange water tank on the containment is gradually reduced, and when the temperature difference between the water temperature in the heat exchange water tank and the temperature in the containment is small or no temperature difference exists, the PCS system loses the cooling function of the containment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be applied to passive air cooling system of containment heat transfer water tank, it can the effectual cooling performance who promotes passive containment cooling system and the security of unit.
The technical scheme of the utility model as follows: the passive air cooling system applied to the containment heat exchange water tank comprises the heat exchange water tank, wherein the heat exchange water tank is fixed in a protection structure on the outer side of a containment, a heat exchanger is arranged in the heat exchange water tank, the top of the protection structure is provided with an air outlet, and the side surface of the protection structure is provided with an air inlet.
The inside of the protective structure except the heat exchange water tank forms an air cooling channel.
The opening of the air inlet is inclined downwards.
And heat exchange fins are fixedly connected to the outer side of the heat exchange water tank.
The heat exchange water tank is in a steel structure form.
The protective structure is a reinforced concrete structure.
The beneficial effects of the utility model reside in that:
(1) The heat exchange water tank of the containment is cooled through passive air cooling, so that the heat exchange capacity between the heat exchange water tank and the atmosphere is enhanced, and the heat conduction performance of the heat exchange water tank to the containment is improved;
(2) The heat exchange water tank is of a steel structure, and heat exchange fins are arranged, so that the heat exchange performance of the passive air cooling heat exchange water tank is effectively enhanced;
(3) The protective structure of the heat exchange water tank can be used as a bearing structure of the water tank, and can resist the impact of external flying objects, so that the safety of the passive heat exchange system of the containment is ensured;
(4) The form that the structure bottom set up the air inlet, the top sets up the gas outlet effectively utilizes "chimney effect" to promote the cooling performance of circulating air to the heat transfer water tank.
Drawings
Fig. 1 is a schematic structural view of a passive air cooling system applied to a containment heat exchange water tank provided by the present invention.
In the figure: the heat exchanger comprises a containment 1, a protection structure 2, a heat exchange water tank 3, heat exchange fins 4, an air cooling channel 5, an air inlet 6, an air outlet 7 and a heat exchanger 8.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, a passive air cooling system applied to a heat exchange water tank of a containment comprises: the containment vessel comprises a containment vessel 1, a protective structure 2 of a containment vessel externally hung water tank, a heat exchange water tank 3, heat exchange fins 4, an air cooling channel 5, an air inlet 6, an air outlet 7 and a heat exchanger 8, wherein the heat exchange water tank 3 is fixed in the protective structure 2 outside the containment vessel 1, the heat exchanger 8 is installed in the heat exchange water tank 3, the heat exchange fins 4 are fixedly connected to the outer side of the heat exchange water tank 3, the outward heat exchange effect of the heat exchange water tank is enhanced by increasing the air convection heat exchange area of the heat exchange water tank, and the cooling performance of the circulating air heat exchange water tank is integrally improved; an air cooling channel 5 is formed inside the protective structure 2 except the heat exchange water tank 3, an air outlet 7 is formed in the top of the protective structure 2, an air inlet 6 is formed in the side face of the protective structure 2, and an opening of the air inlet 6 is obliquely downward. The heat exchange water tank 3 is in a steel structure form, and is fixed on the containment structure through connection on the side close to the containment 1, the heat exchange water tank 3 can ensure that the water tank has good sealing performance and heat conduction performance, and heat in the containment is transferred to the steel heat exchange water tank through the heat exchanger. Except the containment side, the periphery of the other side of the steel heat exchange water tank is provided with an air cooling channel 5, so that a channel for circularly cooling air on the surface of the heat exchange water tank is formed.
And a reinforced concrete protection structure is arranged on the periphery of the steel heat exchange water tank and is connected with the containment structure to form a whole.
The bottom surface of the steel heat exchange water tank is supported and fixed by the bottom of the reinforced concrete protective structure and serves as one of the bearing structures of the heat exchange water tank.
An air cooling channel is formed in the space between the reinforced concrete protective structure and the steel heat exchange water tank, an air circulating air inlet 6 is formed in the bottom of the outer side of the reinforced concrete protective structure, and an air circulating air outlet 7 is formed in the top of the reinforced concrete protective structure.
The bottom air inlet 6 provides the entering of circulating air, the heat dissipation of the steel heat exchange water tank and the heat exchange fins is absorbed by the circulating air through convection heat exchange, and the circulating air is heated and ascended in the cooling channel and is discharged from the top air outlet 7.
When the heat in the containment is discharged, the heat in the containment is transferred to cooling water in the steel heat exchange water tank through the heat exchanger, and the temperature of the cooling water continuously absorbs the heat in the containment and is gradually increased. The rising of cooling water temperature leads to its and steel heat transfer water tank structure to produce the difference in temperature, and the heat is transmitted to microthermal steel heat transfer water tank from the cooling water of high temperature through heat-conducting mode, and steel heat transfer water tank's temperature also risees gradually. The heat exchange fins are uniformly arranged on the surface of the steel heat exchange water tank, and the temperature of the heat exchange fins is increased due to the increase of the temperature of the steel heat exchange water tank. Through the process, the heat in the containment is transferred to the heat exchange water tank of the containment.
Along with the continuous rising of steel heat transfer water tank and heat transfer fin temperature, the air in the air cooling passageway is heated, and the air temperature rise leads to density reduction, and hot-air rises. Cold air enters from an air inlet at the bottom of the reinforced concrete protective structure, the density of the cold air entering from the bottom of the air cooling channel is high, and the density of the air heated in the air cooling channel is low, so that pressure difference is formed, and the air is discharged from bottom to top through an air outlet at the top of the protective structure. The cold air entering from the air inlet continuously absorbs the heat of the steel heat exchange water tank and the wall surface of the heat exchange fin in the air cooling channel in a convection mode, is continuously heated in the rising process, and is finally discharged from the air outlet to release the heat to the atmosphere. Therefore, natural circulation of cooling air is formed, the purpose of cooling the heat exchange water tank by passive air is achieved, and heat in the containment is efficiently released to the atmospheric environment.
The heat emission to atmospheric efficiency of safety shell heat transfer water tank internal cooling water in through the evaporation with the safety shell is limited, and heat transfer water tank's cooling performance reduces after the water tank temperature rises to certain limit value, the utility model discloses an active air cooling heat transfer water tank's of non-system has promoted heat transfer water tank's cooling performance to this utility model still has the outside flying object of protection and bears the weight of the function concurrently, effectively ensures the interior heat passive derivation of safety shell, ensures the safe operation of nuclear power station.
Claims (7)
1. The utility model provides a passive air cooling system for containment heat transfer water tank which characterized in that: the safety device comprises a heat exchange water tank, wherein the heat exchange water tank is fixed in a protection structure on the outer side of a containment, a heat exchanger is arranged in the heat exchange water tank, the top of the protection structure is provided with an air outlet, and the side surface of the protection structure is provided with an air inlet.
2. The passive air cooling system applied to the heat exchange water tank of the containment vessel as recited in claim 1, wherein: an air cooling channel is formed inside the protection structure except for the heat exchange water tank.
3. The passive air cooling system applied to the heat exchange water tank of the containment vessel as claimed in claim 1, wherein: the opening of the air inlet is inclined downwards.
4. The passive air cooling system applied to the heat exchange water tank of the containment vessel as recited in claim 1, wherein: and heat exchange fins are fixedly connected to the outer side of the heat exchange water tank.
5. The passive air cooling system applied to the heat exchange water tank of the containment vessel as claimed in claim 1, wherein: the heat exchange water tank is in a steel structure form.
6. The passive air cooling system applied to the heat exchange water tank of the containment vessel as recited in claim 1, wherein: the protective structure is a reinforced concrete structure.
7. The passive air cooling system applied to the heat exchange water tank of the containment vessel as claimed in claim 2, wherein: the protective structure is a reinforced concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220942386.8U CN217640667U (en) | 2022-04-22 | 2022-04-22 | Passive air cooling system applied to containment heat exchange water tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220942386.8U CN217640667U (en) | 2022-04-22 | 2022-04-22 | Passive air cooling system applied to containment heat exchange water tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217640667U true CN217640667U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220942386.8U Active CN217640667U (en) | 2022-04-22 | 2022-04-22 | Passive air cooling system applied to containment heat exchange water tank |
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| CN (1) | CN217640667U (en) |
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2022
- 2022-04-22 CN CN202220942386.8U patent/CN217640667U/en active Active
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