CN103903658B - A kind of end socket with enhanced boiling heat transfer netted groove connection array hole surface - Google Patents
A kind of end socket with enhanced boiling heat transfer netted groove connection array hole surface Download PDFInfo
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- CN103903658B CN103903658B CN201410103539.XA CN201410103539A CN103903658B CN 103903658 B CN103903658 B CN 103903658B CN 201410103539 A CN201410103539 A CN 201410103539A CN 103903658 B CN103903658 B CN 103903658B
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- end socket
- array hole
- heat transfer
- groove connection
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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
Abstract
The present invention relates to enhanced heat exchange technical field, be specifically related to a kind of end socket with enhanced boiling heat transfer netted groove connection array hole surface.The outer surface of the low head of reactor pressure vessel arranges netted groove, multiple trench cell that netted groove is arranged by netted intersection and connection form, it is respectively provided with intercommunicating pore unit in the cross one another position of trench cell, thus on end socket outer surface, forms the array hole structure of a kind of netted groove connection.When nuclear reactor starts the outside cooling provision of pressure vessel, cooling water can form the stable nucleus of boiling by array hole structure, constantly produce steam jet, the netted groove of connection can suck cooling water by capillary force effect, wetting heat exchange surface, and it is continuously replenished at array hole structure the cooling water needed for boiling heat transfer.The present invention can notable enhanced boiling heat transfer process and improve critical heat flux density, thus significantly improve reactor safety.
Description
Technical field
The present invention relates to enhanced heat exchange technical field, be specifically related to one and there is enhanced boiling heat transfer netted groove even
The end socket on logical array hole surface, for the large nuclear-power reactor pressure vessel lower spherical under serious nuclear accident
The boiling heat transfer strengthening of end socket outside wall surface is to improve the security of nuclear-power reactor.
Background technology
Core meltdown may be caused during large nuclear-power reactor generation major accident, fused mass be cooled down and holds and stays
It it is the key measure of alleviation accident in reactor pressure vessel.By to reactor chamber water-filling, making pressure vessel
Bottom hemispherical end socket floods, and carries out pool boiling cooling outside pressure vessel, is alleviate major accident one
Item important measures.Utilize boiling heat transfer and the passive natural circulation flowing of water outside pressure vessel, by hemispherical
In end socket, the decay heat of fused mass is taken away, thus keeps the integrality of pressure vessel, can avoid and delay follow-up after
A large amount of radioactive substances that the generation of even more serious accident process and nuclear leakage cause are to the release of environment.
Under running the pressure vessel with newly-designed large nuclear-power reactor, the outer surface of dome head is smooth at present
Surface, i.e. there is presently no employing enhanced heat exchange surface.Research shows that porous coating can play preferably strengthening
Boiling heat transfer, improves the effect of critical heat flux density, but coating is relatively easy in transport and installation process and is damaged
Bad, and reliability during long-term operation, validity also are difficult to ensure controlled.Therefore, the present invention
Propose a kind of there is notable enhanced boiling heat transfer effect to connect array hole outer surface with the netted groove of high reliability
End socket, such that it is able to significantly improve the security of nuclear-power reactor.
Summary of the invention
It is an object of the invention to propose a kind of easily fabricated, life-span length on hemispherical low head down, safety can
By and can significantly enhanced boiling heat transfer with raising boiling heat transfer critical heat flux density there is enhanced boiling heat transfer net
The end socket on shape groove connection array hole surface.
In order to reach the above object, the technical solution used in the present invention is:
This end socket is the low head of reactor pressure vessel, and the end socket outer surface of low head arranges netted groove,
Multiple trench cell that netted groove is arranged by netted intersection and connection form, in the cross one another position of trench cell
Put and be respectively provided with intercommunicating pore unit, thus on end socket outer surface, form the array hole knot of a kind of netted groove connection
Structure；The groove connection array hole structure list that the array hole structure of netted groove connection is arranged by several closely spaced arrays
Unit's composition, described groove connection array hole construction unit is by adjacent n the intercommunicating pore list constituting shape summit, n limit
Unit and n the trench cell composition connecting these intercommunicating pore unit.
Described groove connection array hole construction unit is for including triangle, quadrangle, pentagon and hexagon
Polygonal one；The groove that array hole structure the is single structure connection array hole of described netted groove connection
The array combination of construction unit, or be the array group of the groove connection array hole construction unit of two or more structure
Close.
Equivalent diameter D of described intercommunicating pore unit is less than 10mm, and depth H is less than 6mm；Adjacent two
Hole center distance A is equivalent diameter D 1～8 times of individual intercommunicating pore unit；The width K of trench cell does not surpasses
Crossing equivalent diameter D of intercommunicating pore unit, degree of depth C of trench cell is less than the depth H of intercommunicating pore unit.
Isolated hole unit is set on described end socket outer surface with further enhanced boiling heat transfer.
On described end socket outer surface, one or more in very low power, micro-protuberance and microcellular structure are set, are formed micro-
Surface texture.
The grade micro-surface structure arranged on described end socket outer surface is that triangle very low power, rectangle very low power, column are micro-
Projection, hemispherical micro-protuberance, micro-circular hole, micro-irregular hole, blasted rough surface and processing rough surface,
Form the compound of the array hole structure of netted groove connection and the binary complex intensifying boiling heat transfer of grade micro-surface structure
Structure.
Isolated hole unit is set on described end socket outer surface, then grade micro-surface structure is set, form netted groove connection
Array hole structure and the composite construction of tri compound enhanced boiling heat transfer of isolated hole unit and grade micro-surface structure.
Arranging porous coating on described end socket outer surface, the array hole structure and the porous that form netted groove connection are coated with
The composite construction of the binary complex intensifying boiling heat transfer of layer.
Isolated hole unit is set on described end socket outer surface, then arranges in very low power, micro-protuberance and microcellular structure
One or more, form grade micro-surface structure；The most again porous coating is set on end socket outer surface, is formed netted
The quaternary complex intensifying boiling of the array hole structure of groove connection, isolated hole unit, grade micro-surface structure and porous coating
Rise the composite construction of heat exchange.
The invention have the benefit that
(1) the array hole structure of netted groove connection can increase heat exchange area, and array hole structure can be effective
Reduce the initial degree of superheat, form the stable nucleus of boiling, produce steam injection endlessly；Netted groove is tied
Structure utilizes capillary force to suck cooling water, continuous electrowetting array hole heat exchange surface, significantly postpones the appearance of critical crisis.
Netted groove connection array hole structure can significantly enhanced boiling heat transfer process and raising critical heat flux density, from
And security can be significantly improved.
(2) outer surface of the array hole structure of netted groove connection can arrange isolated hole unit, micro-surface knot
Structure is or/and porous coating, it is possible to further increases heat exchange area, utilizes grade micro-surface structure and porous coating simultaneously
Capillary force preferably soak heat exchange surface, further enhance boiling heat transfer.It addition, include the two of porous coating
Unit or multiple elements design enhanced boiling heat transfer structure, significantly enhance the reliable of porous coating surface texture the most simultaneously
Property.
(3) it is less than 6mm, for actual reaction due to the degree of depth of the array hole structure of netted groove connection
Core pressure vessel low head 200mm left and right thickness, its intensity effect is less；Pore structure can be effective simultaneously
Cutting off the extension of crackle, therefore, the array hole structure of netted groove connection is to the intensity of pressure vessel and reliability
Harmful effect will not be produced.
Accompanying drawing explanation
Fig. 1 is a kind of array hole with the connection of enhanced boiling heat transfer netted groove that the embodiment of the present invention 1 provides
The structural representation of the end socket on surface.
Fig. 2 is a kind of enhanced boiling heat transfer netted groove connection array hole structure three that the embodiment of the present invention 1 provides
Dimension sectional structure schematic diagram.
Fig. 3 is the two-dimentional plan structure signal of the netted groove connection array hole structure that the embodiment of the present invention 1 provides
Figure (square array layout).
Fig. 4 is the hemispherical low head down of the netted groove connection array hole structure that the embodiment of the present invention 1 provides
Operation principle schematic diagram.
Fig. 5 is the two-dimentional sectional structure signal of the netted groove connection array hole structure that the embodiment of the present invention 1 provides
Figure.
Fig. 6 is that the pore structure type structure of the netted groove connection array hole structure that the embodiment of the present invention 1 provides is shown
It is intended to.
Fig. 6 is respectively concave bottom circular port, (d) smooth light in (a) flat circular port, (b) cone end circular port, (c)
Sliding end circular pore structure schematic diagram
Fig. 7 is the groove structure type signal of the netted groove connection array hole structure that the embodiment of the present invention 1 provides
Figure.
Fig. 7 is respectively (a) rounded-rectangular groove, (b) blunt end U-channel, (c) blunt end vee-cut, (d) U
Groove structure schematic diagram is expanded in shape groove, (e).
Fig. 8 is that the another kind that the embodiment of the present invention 1 provides has enhanced boiling heat transfer netted groove connection array hole
The structural representation (triangular array layout) of the end socket on surface.
Fig. 9 is the two-dimentional plan structure schematic diagram of the netted groove connection array hole structure of Fig. 8.
Figure 10 is the two dimension vertical view of another netted groove connection array hole structure that the embodiment of the present invention 1 provides
Structural representation (oblique quadrangular array layout).
Figure 11 is the two dimension vertical view of another netted groove connection array hole structure that the embodiment of the present invention 1 provides
Structural representation (quadrangle and pentagon mixing array are arranged).
Figure 12 is the two dimension vertical view of another netted groove connection array hole structure that the embodiment of the present invention 1 provides
Structural representation (quadrangle and hexagon mixing array are arranged).
Figure 13 is the two dimension vertical view of another netted groove connection array hole structure that the embodiment of the present invention 1 provides
Structural representation (quadrangle, pentagon and hexagon mixing array are arranged).
Figure 14 be the embodiment of the present invention 1 provide another have enhanced boiling heat transfer netted groove connection array
The structural representation (non-homogeneous triangle and quadrangle mixing array are arranged) of the end socket of hole surface.
Figure 15 is the three-dimensional structure of the another kind of netted groove connection array hole structure that the embodiment of the present invention 2 provides
Schematic diagram (outer surface arranges isolated hole unit).
Figure 16 is that the three-dimensional structure of a kind of netted groove connection array hole structure that the embodiment of the present invention 3 provides is shown
It is intended to (outer surface arranges the grade micro-surface structures such as very low power, micro-protuberance and/or micropore).
Figure 17 is the three-dimensional structure of the another kind of netted groove connection array hole structure that the embodiment of the present invention 4 provides
Schematic diagram (outer surface arranges porous coating).
Label in figure:
1-low head；2-end socket outer surface；The array hole structure of 3-netted groove connection；31-groove connection array
Pore structure unit；4-hole unit；41-intercommunicating pore unit；42-isolates hole unit；5-netted groove；51-groove
Unit；6-reactor pressure vessel；7-reactor core fused mass；8-containment；9-seethes with excitement bubble；The micro-surface of 10-is tied
Structure；11-porous coating.
Detailed description of the invention
The invention provides a kind of enhanced boiling heat transfer netted groove connection array hole structure, below in conjunction with the accompanying drawings and
The present invention will be further described for detailed description of the invention.
Embodiment 1
Fig. 1 is that the one that first embodiment of the invention provides has enhanced boiling heat transfer netted groove connection array hole
The structural representation of the end socket on surface.Fig. 2 is a kind of enhanced boiling heat transfer net that first embodiment of the invention provides
Shape groove connection array hole structure three-dimensional sectional structure schematic diagram.
As depicted in figs. 1 and 2, the end socket outer surface 2 of the low head 1 of reactor pressure vessel arranges net
Shape groove 5, the infall of multiple trench cell 51 that the netted intersection connection at composition netted groove 5 is arranged sets
Putting intercommunicating pore unit 41, adjacent intercommunicating pore unit 41 is connected by several trench cell 51, thus in reaction
The structure of the array hole of a kind of netted groove connection is formed on the end socket outer surface 2 of core pressure vessel low head 1,
The array hole structure 3 of a kind of netted groove connection is i.e. set on end socket outer surface 2.The connection of this netted groove
The structure of array hole can also be expressed as, and sets on the end socket outer surface 2 of the low head 1 of reactor pressure vessel
Putting several intercommunicating pore unit 41 that closely spaced array is arranged, adjacent intercommunicating pore unit 41 is by trench cell 51
Connection, the netted multiple trench cell 51 intersecting connection layout form netted groove 5.Multiple adjacent intercommunicating pores
Unit 41 forms a groove connection array hole with the multiple trench cell 51 connecting adjacent intercommunicating pore unit 41
Construction unit 31, the multiple grooves connection array hole construction unit 31 arranged at heat exchange surface array forms netted
The array hole structure 3 of groove connection.
Fig. 3 is the two-dimentional plan structure of the array hole structure of the netted groove connection that first embodiment of the invention provides
Schematic diagram.Further, as it is shown on figure 3, the end socket outer surface 2 of low head 1 at reactor pressure vessel
On be provided with intensive quadrangular array arrange multiple intercommunicating pore unit 41, constitute quadrangle summit intercommunicating pore list
Unit 41 is connected by trench cell 51.That is, adjacent intercommunicating pore unit 41 is that quadrangle is arranged, 4 groove lists
4 intercommunicating pore unit 41 that unit 51 connection quadrangle is arranged, 4 intercommunicating pore lists that this adjacent quadrangular is arranged
Unit 41 forms a groove with the trench cell 51 connecting these 4 intercommunicating pore unit 41 and connects array hole structure
Unit 31；Multiple grooves connection array hole construction unit 31 that closely spaced array quadrangle is arranged forms netted groove
The array hole structure 3 of connection.A kind of version that intercommunicating pore unit 41 is hole unit 4 of this embodiment.
This has the enhanced boiling heat transfer work of end socket on array hole surface of enhanced boiling heat transfer netted groove connection
Make principle as shown in Figure 4.When reactor generation major accident, reactor core melts, and reactor core fused mass 7 falls into
In the low head 1 of the lower spherical of reactor pressure vessel 6, now by water-filling in containment vessel 8
Pressure vessel bottom hemispherical head is flooded, pressure vessel outer wall is carried out pool boiling cooling.Only
Ensure that the heat flux of pressure vessel outer wall when reactor core fused mass is full of hemispherical low head is not above boiling
Heat exchange critical heat flux density (is called for short CHF), and reactor pressure vessel outside wall surface is in the way of nucleate boiling heat exchange
It is adequately cooled, thus ensures the integrality of pressure vessel and stop the leakage of nuclear fuel.In reactor pressure
The array hole structure 3 of the netted groove connection of the outer wall processing of the low head 1 of force container 6, can significantly improve
Its CHF, thus significantly improve its security, it is mainly manifested in:
(1) structure of the intercommunicating pore unit 41 that closely spaced array is arranged can form the stable nucleus of boiling, constantly
Forming the injection of strong steam, form stronger many longitudinal turbulences, the pore structure that closely spaced array is arranged simultaneously can also be big
Increase greatly heat exchange area, be greatly enhanced boiling heat transfer, improve boiling heat transfer critical heat flux；
(2) structure of netted groove 5 is not only greatly increased heat exchange area, and sucks cooling by capillary force
Water, soaks heat exchange surface, is interconnected by the array hole that closely spaced array is arranged, is beneficial to soak the heat exchange surface in hole,
Especially make heat exchange surface be difficult to dry up under the conditions of high hot-fluid boiling heat transfer, significantly improve boiling heat transfer critical heat
Stream.
(3) intercommunicating pore unit 41 can effectively cut down the various stress collection neutralization Crack Extension on end socket surface, bag
Include the stress concentration that surface peening structure particularly netted groove is caused, improve the security reliability of end socket.
In order to make it easy to understand, the present embodiment described in the array hole of netted groove connection is described more fully
Structure.
Fig. 5 is the two-dimentional section view knot of the array hole structure of the netted groove connection that the first embodiment of the present invention provides
Structure schematic diagram.In Figure 5, D is hole element diameter, and H is hole unit depth, and K is trench cell width,
C is the trench cell degree of depth, and A is adjacent intercommunicating pore unit center spacing.
Concrete, equivalent diameter D of intercommunicating pore unit 41 is less than 10mm, it is recommended that approximate aperture D is
1-5mm, equivalent diameter is 4S/L, and wherein S is the area in hole, the girth in L hole；The perforate of array hole structure
Rate is preferably 5%-30%, the percent opening of pore structure be defined as the hole area sum of all perforates on low head 1 with
The ratio of wall surface area during low head 1 not perforate.The depth H of intercommunicating pore unit 41 is less than 6mm, preferably
Hole unit depth H is 2-3mm.Hole center distance A of adjacent intercommunicating pore unit 41 is hole equivalent diameter D
1-8 times, center distance A of adjacent intercommunicating pore unit 41 is preferably 2-5 times of equivalent diameter D of hole unit.
The width K of netted groove unit 51 is less than equivalent diameter D of hole unit, and netted groove cell width is preferred
For the 1/4-1/2 of hole unit equivalent diameter, and the center line of netted groove unit and the circle center line connecting of respective aperture unit
Can be on the same line.Degree of depth C of netted groove is preferably less than the depth H in hole, netted groove degree of depth C
The 1/2-3/4 of hole depth H.Preferably the processing method of hole unit can use boring, punching, Laser Processing,
The mode such as ultrasonic drilling, electric spark-erosion perforation；The version of hole unit can be varied, and Fig. 6 is respectively
A in () flat circular port, (b) cone end circular port, (c), concave bottom circular port, (d) smooth circular pore structure of the smooth end show
It is intended to；Can also be to include polygonal hole, shoulder hole, petal hole；Or the combination bore form in above-mentioned various hole.
Furthermore it is possible to be the combination in the hole of all kinds of different approximate aperture.
Fig. 7 is the groove structure of the array hole structure of the netted groove connection that the first embodiment of the present invention provides
Two dimension sectional structure schematic diagram.Groove structure can be (a) rounded-rectangular groove, (b) blunt end U-channel, (c)
Groove is expanded in vee-cut of the blunt end, (d) U-channel, (e).The version of groove can be varied, also
It can be the combination of these several grooves.
Concrete, the array hole structural parameters of the netted groove connection of the present embodiment one shown in Fig. 1-Fig. 4 are:
Equivalent diameter D of intercommunicating pore unit 41 is 3mm, and the degree of depth of intercommunicating pore unit 41 is 3mm, trench cell
Width K is 1mm, and trench cell degree of depth C is 2mm, and center distance A of adjacent intercommunicating pore unit is 8mm.
The percent opening of the array hole structure of the netted groove connection of the present embodiment one shown in Fig. 1-Fig. 4 is 11%, heat exchange
Surface area increases by 94%.
The groove connection array hole construction unit of the present embodiment one shown in Fig. 1-Fig. 4 is square, netted ditch
The array hole structure of groove connection is multiple array hole construction units that intensive square array is arranged；Groove connects
Array hole construction unit can also be triangle, and the array hole structure of netted groove connection is intensive triangular array
The multiple array hole construction units arranged, such as Fig. 8 and Fig. 9；Groove connection array hole construction unit can also be
Tiltedly quadrangle, the array hole structure of netted groove connection is multiple array holes knot that intensive oblique quadrangular array is arranged
Structure unit, such as Figure 10；Groove connection array hole construction unit can also be quadrangle or pentagon, netted ditch
The array hole structure of groove connection is intensive quadrangle and multiple array hole structure lists of pentagon mixing array layout
Unit, such as Figure 11:；Groove connection array hole construction unit can also be quadrangle or hexagon, netted groove
The array hole structure of connection is intensive quadrangle and multiple array hole construction units of hexagon mixing array layout,
Such as Figure 12；Groove connection array hole construction unit can also be pentagon or hexagon, netted groove connection
Array hole structure is multiple array hole structure lists that intensive quadrangle, pentagon and hexagon mixing array are arranged
Unit, such as Figure 13.In a word, groove connection array hole construction unit can also is that triangle or polygon, including
Quadrangle, pentagon and hexagon, the array hole structure of netted groove connection is intensive triangle or polygon,
Including quadrangle, pentagon and hexagon, multiple battle arrays that any one or several mixing array therein are arranged
Row pore structure unit (part is arranged and do not provided embodiment).
The present embodiment one shown in Fig. 1-Fig. 4 netted groove connection array hole structure in intercommunicating pore unit and
Trench cell is for be more evenly arranged.Under major accident, reactor core fused mass 7 is by the low head 1 of pressure vessel
Accept, the middle part for low head 1 and the top of high heat density may be produced according to existing theory analysis.Therefore,
Can suitably encrypt the array hole structure list that netted groove connects with top at the middle part of outer surface of low head 1
Unit, intercommunicating pore unit and trench cell in the array hole structure of namely netted groove connection are non-homogeneous cloth
Put, to improve the boiling heat transfer intensity of local further, as shown in figure 14.In fig. 14, at low head 1
Middle part and triangular arrangement that top is intercommunicating pore unit closely spaced array, be intercommunicating pore in the bottom of low head 1
The quadrangle of unit closely spaced array is arranged, and between the adjacent holes unit center on the middle part of low head 1 and top
Away from about the half of the adjacent holes unit center spacing of about bottom, this adopt according to the difference of heat flow density
Processing cost can be reduced while ensureing heat exchange property and security with nonuniform mutation operator.
Embodiment 2
Figure 15 show the three dimensional sectional view of the second embodiment.In order to further increase netted groove connection
The wetability of array hole structure 3 is with further enhanced boiling heat transfer and improves critical heat flux density, can be in reaction
On the basis of the array hole structure of netted groove connection is set on the end socket outer surface 2 of core pressure vessel low head,
Optical surface arranges isolated hole unit 42 again, increases heat exchange area further, strengthen wall wetability, strengthening
Boiling heat transfer and raising critical heat flux density.Described isolated hole unit 42 is not connected by trench cell 51
A kind of hole unit, and a kind of hole unit that described intercommunicating pore unit 41 is connected by trench cell 51.This enforcement
The described isolated hole unit 42 of example is identical with the architectural feature of intercommunicating pore unit 41, it is also possible to different.This implements
The hole unit 4 of example includes intercommunicating pore unit 41 and the hole unit of isolated hole 42 two kinds of versions of unit.
Concrete, the isolated hole cell parameters of the present embodiment 2 shown in Figure 15 is: the equivalent of isolated hole unit
Diameter D is 3mm, and hole unit depth is 3mm, identical with embodiment 1 mesopore cellular construction parameter.
The present embodiment two main difference is that with embodiment one, the netted groove that embodiment two is arranged in embodiment one
On the array hole architecture basics of connection, the end socket outer surface 2 of reactor pressure vessel low head is provided with again
Isolated hole unit 42, increases heat exchange area further, strengthens wall wetability, thus has more excellent strengthening boiling
Rise the performance of heat exchange, and be remarkably improved critical heat flux density.
Embodiment 3
Figure 16 show the three dimensional sectional view of the 3rd embodiment.In order to further increase netted groove connection
The wetability of array hole structure 3 is with further enhanced boiling heat transfer and improves critical heat flux density, can be in reaction
On the basis of the array hole structure of netted groove connection is set on the end socket outer surface 2 of core pressure vessel low head,
The grade micro-surface structures such as very low power, micro-protuberance and/or micropore are set again, as triangle very low power, rectangle very low power,
Column micro-protuberance, hemispherical micro-protuberance, micro-circular hole, micro-irregular hole, blasted rough surface, process coarse table
Faces etc., can be more beneficial for liquid enter heat exchange surface, such that it is able to strengthen boiling further with wall wetabilitys
Heat exchange and raising critical heat flux density.The grade micro-surface structures such as described very low power, micro-protuberance and/or micropore have referred to
The degree of depth or height are less than the groove of 1mm, projection and/or hole.
Concrete, Figure 16 is the array hole structure outermost layer heat exchange surface increase very low power in netted groove connection
Structure, the very low power degree of depth is less than 1mm, it is recommended that degree of depth 0.3-0.5mm.
Said structure is micro-surfaces such as array hole structure and very low power, micro-protuberance and/or the micropore of netted groove connection
The composite construction of the binary complex intensifying boiling heat transfer of structure, not only has the array hole structure of netted groove connection
Effect, and grade micro-surface structures such as the very low power increased, micro-protuberance and/or micropore, it is possible to further increase
The wetability of heat exchange surface and heat exchange area, further enhance the intensity of boiling heat transfer, significantly improve critical heat flux
Density.Can also on the basis of embodiment 2, then arrange grade micro-surface structure formed tri compound strengthening boiling change
The composite construction of heat, with further enhanced boiling heat transfer and raising critical heat flux density.
The present embodiment three main difference is that with embodiment one, the netted groove that embodiment three is arranged in embodiment one
On the array hole architecture basics of connection, the end socket outer surface 2 of reactor pressure vessel low head is arranged again micro-
The grade micro-surface structures such as groove, micro-protuberance and/or micropore, thus there is the performance of more excellent enhanced boiling heat transfer and show
Write and improve critical heat flux density, but the structure of embodiment one is simpler.
Embodiment 4
Figure 17 show the three dimensional sectional view of the 4th embodiment.In order to further increase netted groove connection
The wetability of array hole structure 3 is with further enhanced boiling heat transfer and improves critical heat flux density, can be in reaction
On the basis of the array hole structure of netted groove connection is set on the end socket outer surface 2 of core pressure vessel low head,
Porous coating is set again, and includes array hole surface and net on array hole structure 3 surface of netted groove connection
Shape flute surfaces arranges porous coating, as sintered metal particle porous coating, the foam porous coating of sintering metal,
Corrosion porous layers etc., with wall wetability, can form array hole structure and the porous coating table of netted groove connection
The composite construction of the binary complex intensifying boiling heat transfer of face structure, is more beneficial for liquid and enters heat exchange surface, thus
Can further enhanced boiling heat transfer and improve critical heat flux density.Furthermore it is also possible to first at end socket outer surface 2
On array hole structure and isolated hole unit and the micro-table of very low power, micro-protuberance and/or micropore of netted groove connection are set
Face structure, the most outside surface configuration porous coating, form the array hole structure of netted groove connection, isolate
The composite construction of the quaternary complex intensifying boiling heat transfer of hole unit, grade micro-surface structure and porous coating, such that it is able to
The most notable enhanced boiling heat transfer effect.
The array hole structure of this netted groove connection, isolated hole unit, very low power, micro-protuberance and/or micropore etc. are micro-
Surface texture and the combination of porous coating structure, be not simple addition, but on the one hand can significantly strengthen boiling
Rise heat transfer effect, on the other hand significantly enhance the reliability of porous coating surface texture the most simultaneously, such that it is able to
Solve the problem that the reliability of existing porous coating surface texture is not enough well.The present embodiment four and embodiment
One, main difference is that of embodiment two and embodiment three, embodiment four in embodiment one or embodiment two or
On the basis of embodiment three, end socket outer surface 2 arranges porous coating surface again, thus have more excellent strong
Change the performance of boiling heat transfer and significantly improve critical heat flux density, but embodiment one, embodiment two and embodiment three
Structure simpler.
Claims (9)
1. an end socket with enhanced boiling heat transfer netted groove connection array hole surface, it is characterised in that
This end socket is the low head of reactor pressure vessel, the end socket outer surface (2) of low head (1) is arranged netted
Groove (5), multiple trench cell (51) that netted groove (5) is arranged by netted intersection and connection form,
It is respectively provided with intercommunicating pore unit (41) in trench cell (51) cross one another position, thus in end socket appearance
The upper array hole structure (3) forming the connection of a kind of netted groove in face (2)；The array hole knot of netted groove connection
Groove connection array hole construction unit (31) that structure (3) is arranged by several closely spaced arrays forms, described ditch
Groove connection array hole construction unit (31) is by adjacent n the intercommunicating pore unit (41) constituting shape summit, n limit
With n trench cell (51) composition connecting these intercommunicating pore unit (41).
One the most according to claim 1 has enhanced boiling heat transfer netted groove connection array hole surface
End socket, it is characterised in that described groove connection array hole construction unit (31) for including triangle, four limits
Shape, pentagon or hexagon are in interior polygonal one；The array hole structure (3) of described netted groove connection
Groove for single structure connects the array combination of array hole construction unit (31), or is two or more structure
Groove connection array hole construction unit (31) array combination.
One the most according to claim 1 has enhanced boiling heat transfer netted groove connection array hole surface
End socket, it is characterised in that equivalent diameter D of described intercommunicating pore unit (41) be less than 10mm, the degree of depth
H is less than 6mm；Hole center distance A is equivalent diameter D 1～the 8 of adjacent two intercommunicating pore unit (41)
Times；The width K of trench cell (51) is less than equivalent diameter D of intercommunicating pore unit (41), trench cell
(51) degree of depth C is less than the depth H of intercommunicating pore unit (41).
One the most according to claim 1 has enhanced boiling heat transfer netted groove connection array hole surface
End socket, it is characterised in that isolated hole unit (42) is set on described end socket outer surface (2) with further
Enhanced boiling heat transfer.
One the most according to claim 1 has enhanced boiling heat transfer netted groove connection array hole surface
End socket, it is characterised in that on described end socket outer surface (2), very low power, micro-protuberance and microcellular structure are set
In one or more, formed grade micro-surface structure.
One the most according to claim 5 has enhanced boiling heat transfer netted groove connection array hole surface
End socket, it is characterised in that the upper grade micro-surface structure arranged of described end socket outer surface (2) is the micro-ditch of triangle
Groove, rectangle very low power, column micro-protuberance, hemispherical micro-protuberance, micro-circular hole, micro-irregular hole, blasted rough
Surface and processing rough surface, the array hole structure of formation netted groove connection and the binary of grade micro-surface structure are multiple
Close the composite construction of enhanced boiling heat transfer.
One the most according to claim 5 has enhanced boiling heat transfer netted groove connection array hole surface
End socket, it is characterised in that on described end socket outer surface (2), isolated hole unit (42) is set, then arranges micro-
Surface texture, the array hole structure of formation netted groove connection and the ternary of isolated hole unit and grade micro-surface structure are multiple
Close the composite construction of enhanced boiling heat transfer.
One the most according to claim 1 has enhanced boiling heat transfer netted groove connection array hole surface
End socket, it is characterised in that porous coating is set on described end socket outer surface (2), forms netted groove even
Logical array hole structure and the composite construction of the binary complex intensifying boiling heat transfer of porous coating.
One the most according to claim 1 has enhanced boiling heat transfer netted groove connection array hole surface
End socket, it is characterised in that on described end socket outer surface (2), isolated hole unit (42) is set, then arranges micro-
One or more in groove, micro-protuberance and microcellular structure, form grade micro-surface structure；The most again in end socket appearance
Porous coating is set on face (2), forms the array hole structure of netted groove connection, isolated hole unit, micro-table
The composite construction of the quaternary complex intensifying boiling heat transfer of face structure and porous coating.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410103539.XA CN103903658B (en) | 2014-03-19 | 2014-03-19 | A kind of end socket with enhanced boiling heat transfer netted groove connection array hole surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410103539.XA CN103903658B (en) | 2014-03-19 | 2014-03-19 | A kind of end socket with enhanced boiling heat transfer netted groove connection array hole surface |
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| Publication Number | Publication Date |
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| CN103903658A CN103903658A (en) | 2014-07-02 |
| CN103903658B true CN103903658B (en) | 2016-08-17 |
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| CN201410103539.XA Expired - Fee Related CN103903658B (en) | 2014-03-19 | 2014-03-19 | A kind of end socket with enhanced boiling heat transfer netted groove connection array hole surface |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104637553A (en) * | 2015-01-28 | 2015-05-20 | 中科华核电技术研究院有限公司 | Flow distribution device and nuclear reactor component with same |
| CN105697774A (en) * | 2016-03-09 | 2016-06-22 | 无锡锡洲封头制造有限公司 | Water diversion cooling seal |
| CN108806806B (en) * | 2018-06-27 | 2020-06-19 | 清华大学 | Nuclear reactor pressure vessel provided with unit combined type netted hollow plate shell |
| CN112652411B (en) * | 2019-10-11 | 2024-03-22 | 国核华清（北京）核电技术研发中心有限公司 | Nuclear reactor pressure vessel lower seal head with high-durability composite coating structure and preparation method thereof |
| CN112002446A (en) * | 2020-07-28 | 2020-11-27 | 上海核工程研究设计院有限公司 | Reactor pressure vessel lower head with porous coating on outer wall surface |
| CN115900404B (en) * | 2022-11-21 | 2023-07-21 | 上海交通大学 | Heating flat boiling reinforced microstructure modified surface and realization method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3247074A (en) * | 1963-06-18 | 1966-04-19 | Babcock & Wilcox Co | Steam cooled reactor reactor arrangement |
| CA2543480C (en) * | 2003-10-23 | 2011-01-04 | Wolverine Tube, Inc. | Method and tool for making enhanced heat transfer surfaces |
| CN2821505Y (en) * | 2005-08-09 | 2006-09-27 | 江苏萃隆铜业有限公司 | Evaporator heat exchanging tube |
| US8127462B2 (en) * | 2006-04-21 | 2012-03-06 | Osvaldo Ricardo Haurie | Cylindrical dryer having conduits provided within a plurality of holding plates |
| CN103050155B (en) * | 2012-11-06 | 2015-12-02 | 国家核电技术有限公司 | Accident mitigation device and manufacture method, nuclear plant pressure vessels, accident mitigation method |
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