CN204043467U - A kind of heat exchanger for power station 1,000,000 unit indirect air cooling system - Google Patents
A kind of heat exchanger for power station 1,000,000 unit indirect air cooling system Download PDFInfo
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- CN204043467U CN204043467U CN201420439621.5U CN201420439621U CN204043467U CN 204043467 U CN204043467 U CN 204043467U CN 201420439621 U CN201420439621 U CN 201420439621U CN 204043467 U CN204043467 U CN 204043467U
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Abstract
The utility model provides a kind of heat exchanger for power station 1,000,000 unit indirect air cooling system, described radiator comprises heat dissipation base and radiating fin, wherein said radiating fin is located on heat dissipation base, it is characterized in that, described radiating fin is offered the heat exchange base tube mounting hole that many rows are parallel, often all offer bridge type projection between any two adjacent heat exchange base tube mounting holes in row, the two ends of described bridge type projection are connected with fin body, for becoming to be less than or equal to the face of an angle of 90 degrees with fin body.The beneficial effects of the utility model to make each several part heat exchange of radiator balanced, can effectively strengthen overall heat exchange performance, and the overall resistance of fin increases few.
Description
Technical field:
The utility model relates to a kind of heat exchanger for power station 1,000,000 unit indirect air cooling system, this products application in the air cooling system in the field such as thermal power plant, nuclear power station, for completing the exchange of heat.Concrete form is its fin employing used is the multi coil fin that bridge form is opened in a kind of employing, and the quantity opening bridge increases gradually, and the height simultaneously opening bridge is different again.
Background technology
China's economy grows continuously and fast in recent years, the supply growing tension of electric power, and therefore to accelerate development large-capacity steam turbine unit imperative in power industry.Power industry is produced and is not only consumed a large amount of primary energy, also consumes a large amount of water resources simultaneously.And China is that water resource lacks and " three Norths " of the unbalanced country of distributed pole, particularly China (North China, northeast, northwest) is regional, rich coal resources, but water resource is very poor.Wet type cooling generation technology has constrained the development of power industry, and air cooling technique arises at the historic moment.Because air cooling has water saving, tally with the national condition, meet national industrial policies, thus Luo obtained market, showed good market prospects.
The nucleus equipment of indirect air cooling system is heat exchanger, and heat exchanger body is made up of some tube banks, and tube bank can adopt aluminum pipe aluminum fin-stock or steel pipe steel fin.At present large entry adopts many row's aluminum pipe aluminum fin-stock forms, between aluminum pipe with fin expanded joint to together with become tube bank.Relative to steel pipe steel fin, aluminum pipe aluminum fin-stock has the following advantages:
1) material of heat exchanger is that fine aluminium has higher thermal conductivity factor.
2) aluminium has high corrosion-resistant through special reinforced surface passivating treatment.
3) density of aluminium is low, only has 34.5% of steel.Having higher specific strength, is a kind of space metal.Therefore outfit of equipment is lightweight, easily carrying, easily Assembling.
4) adopt aluminum pipe expanded joint aluminum fin-stock thus avoid dissimilar metal contact produce galvanic corrosion.
The general fin used has corrugated fin, plain fin and slitted fin etc. in the prior art.Corrugated fin is formed by suppressing ripple along flow direction on fin, produces Secondary Flow and boundary layer separation and heat-transfer effect is strengthened owing to constantly changing flow direction; But due to its processing more complicated, exit competition gradually.Plain fin used widely in the eighties in last century, it relatively simple for structure, but the exchange capability of heat of plain fin does not reach far away now to the requirement of high-performance heat exchanger.Slitted fin be not continuous print along fin on flow direction, but punching has certain silver.Crack and add the disturbance of fluid, destroy the flow boundary layer near fin, thus enhance the heat exchange property of heat exchanger.At present, slitted fin is adopted to be the more effective enhanced heat exchange mode of one, a kind of venetian blind type slitted fin is also disclosed in prior art, the windup-degree of its all silver is identical, although these slotted fin schemes improve heat exchange property, but fluid resistance can obviously raise, and processing is also more difficult.Fewer if cracked, the destruction of its disturbance to fluid and the flow boundary layer to air will be smaller, and field coordination improves not, effectively can not strengthen heat exchange.So, according to circumstances suitably regulate quantity of cracking effectively can improve heat exchange efficiency and avoid resistance too high.
At present, known aluminum pipe aluminum fin-stock heat exchanger, for improving heat exchange property, have employed the fin of enhanced heat exchange better performances, is generally and equidistantly opens bridge fin, four comb double-flows.This fin is widely used on the air cooling apparatus of middle-size and small-size power station unit, achieves good effect.Along with the progress of technology and the needs in market, 1,000,000 unit application indirect air cooling systems become a kind of feasible and comparatively preferred scheme.
The heat exchange area that 1000000 unit indirect air cooling systems need is comparatively large, adopts the quantity of four comb Double-tube-pass heat exchangers more, indirect cool tower will be made oversize, and initial cost increases.For this problem, as still increased area corresponding to two combs by the fin configuration of former four comb double-flows, although the coefficient of heat transfer is higher, significantly can increase the resistance of air side, being forced to the height increasing indirect cool tower.
Utility model content
The purpose of this utility model is the high-performance heat exchanger providing a kind of new model, to improve the deficiency existed in 1,000,000 unit indirect air cooling systems.
For achieving the above object, what the utility model employing was novel opens bridge fin.Wherein, described fin is offered the heat exchange base tube mounting hole that many rows are parallel, cooling water or cold-producing medium are at heat exchange base Bottomhole pressure, and heat exchange base tube is installed in mounting hole, often arrange between any two adjacent heat exchange base tube mounting holes and all have bridge type projection.The two ends of bridge type projection are connected with fin body, for becoming to be less than or equal to the inclined-plane of an angle of 90 degrees with fin body.The top of bridge type projection is rectangle, parallel with fin body, top and inclined-plane, two ends and fin body form isosceles trapezoid (cross section) jointly, be not limited to trapezoidal in certain the utility model, bridge type projection and fin body can also be formed in (cross sections) such as rectangle, triangle, circular arcs.
The utility model provides a kind of heat exchanger for power station 1,000,000 unit indirect air cooling system, described radiator comprises heat dissipation base and radiating fin, wherein said radiating fin is located on heat dissipation base, described radiating fin is offered the heat exchange base tube mounting hole that many rows are parallel, often all offer bridge type projection between any two adjacent heat exchange base tube mounting holes in row, the two ends of described bridge type projection are connected with fin body, for becoming to be less than or equal to the face of an angle of 90 degrees with fin body;
Further, described radiator meets following formula: d=n*d1+ (n-1) * d2, wherein d is the diameter of each heat exchange base tube mounting hole, n is the quantity of often arranging bridge type projection corresponding to heat exchange base tube mounting hole, d1 is the width of each bridge type projecting tip, and d2 often arranges vertical interval between adjacent bridge type projection corresponding to heat exchange base tube mounting hole; Along air-flow direction, the bridge quantity of opening of often arranging mounting hole corresponding increases;
Further, what what rear row's mounting hole was corresponding opened the last row of bridge number ratio opens many one of bridge quantity;
Further, often arranging bridge quantity of opening corresponding to mounting hole is even number, and the bridge quantity of opening of first row mounting hole is two, and the bridge quantity of opening of rear row's mounting hole opens many two of bridge quantity successively than last row;
Further, often arranging bridge quantity of opening corresponding to mounting hole is odd number, and the bridge quantity of opening of first row mounting hole is one, and the bridge quantity of opening of rear row's mounting hole opens many two of bridge quantity successively than last row;
Further, often arranging bridge quantity of opening corresponding to mounting hole is even number, and bridge quantity of opening of first and second row's mounting hole is two, after the bridge quantity of opening of every two row's mounting holes open many two of bridge quantity successively than front two rows; Or often arranging bridge quantity of opening corresponding to mounting hole is odd number, bridge quantity of opening of first and second row's mounting hole is three, after the bridge quantity of opening of every two row's mounting holes open many two of bridge quantity successively than front two rows;
Further, described bridge type projection is divided into high bridge and low bridge, and high bridge and low bridge are alternately arranged, and wherein the height of low bridge is the half of high bridge;
Further, the height change of often arranging bridge type projection in a unit corresponding to mounting hole is quadratic function curve change;
Further, the change of often arranging the height of bridge type projection in a unit corresponding to mounting hole is Gauss normal distribution curvilinear motion;
Further, the height of described high bridge is 0.6-2.5mm;
The most outstanding feature of the utility model one is that the bridge quantity of opening that fin often arranges base tube mounting hole corresponding along air-flow direction progressively increases, and opens bridge spacing accordingly and reduces gradually along direction windward.Because the temperature difference of direction air intake place fin and air is comparatively large windward, good effect of heat exchange, open the requirement that bridge spacing also can meet comparatively greatly heat exchange amount.Prolong windward that direction air outlet slit place air is because of through heat exchange, temperature improves a lot, and heat transfer effect is poor, and opening bridge encryption can increase the effect destroying boundary layer of air, improves heat transfer effect herein; Another feature is out that the height of bridge is set as plurality of specifications, respectively arranges the alternately change of bridge height, can increase the effect destroying boundary layer of air, make each open large as far as possible the playing a role of bridge along air-flow direction.
Adopt the utility model that each several part heat exchange of radiator can be made balanced, can effectively strengthen overall heat exchange performance, the overall resistance of fin increases few.
Accompanying drawing explanation
Fig. 1 is a kind of overall structure schematic diagram of the present utility model;
Fig. 2 is the schematic diagram of the A-A sectional view half-twist of Fig. 1;
Fig. 3 is the B-B sectional view of Fig. 1;
Fig. 4 is the A-A sectional view half-twist schematic diagram of the utility model embodiment two;
Fig. 5 is the A-A sectional view half-twist schematic diagram of the utility model embodiment three;
Fig. 6 is the A-A sectional view half-twist schematic diagram of the utility model embodiment five;
Fig. 7 is the A-A sectional view half-twist schematic diagram of the utility model embodiment six.
Detailed description of the invention
The embodiment provided below in conjunction with accompanying drawing is described in further detail the utility model.
As shown in Figure 1,3, the utility model comprises the fin body 1 heat exchange base tube mounting hole 2 parallel with six rows be arranged in parallel in fin body 1, and bridge type projection 3 corresponding to each mounting hole (3'), bridge type projection is arranged symmetrically with along the center line of air-flow direction by two heat exchange base tube mounting holes 2.(5') the two ends 5 of bridge type projection are connected with fin body 1, for becoming to be less than or equal to the inclined-plane of an angle of 90 degrees with fin body.(4') the top 4 of bridge is rectangle, parallel with fin body 1, and (3') (5') (4') top 4 form bridge type projection (opening bridge) 3 jointly with inclined-plane, two ends 5.
As shown in Figure 1, 2, the utility model fin body 1 along air-flow direction often arrange base tube mounting hole 2 correspondence open bridge 3 (3') quantity progressively increase, the bridge sheet spacing of namely air flowing upstream is greater than the spacing of the bridge type projection of air flow downstream.Be described as follows with formula:
D=n*d1+ (n-1) * d2, wherein d is the diameter of heat exchange base tube mounting hole, n is the quantity of often arranging bridge type projection corresponding to heat exchange base tube mounting hole, and d1 is the width of each bridge type projecting tip, and d2 often arranges vertical interval between adjacent bridge type projection corresponding to heat exchange base tube mounting hole; When d, d1 are constant, along with the increase of n, d2 will inevitably reduce.
[embodiment one]
See Fig. 1, Fig. 2, the corresponding 2 groups of bridge type projections of the present embodiment first row mounting hole, the corresponding 3 groups of bridge type projections of second row mounting hole, the like, the corresponding 7 groups of bridge type projections of the 6th row's mounting hole.Air-flow flows through heat exchange fin along predetermined direction under the guiding of each bridge sheet both sides, is not subject to strong stop, so windage can not significantly increase.Wherein the spacing of the bridge type projection that first row mounting hole is corresponding is 10mm; Along with airflow direction reduces successively, the spacing of the bridge type projection that the 6th row's mounting hole is corresponding is 1.2mm.
[embodiment two]
As shown in Figure 4, in this embodiment, the corresponding 2 groups of bridge type projections of first row mounting hole, the corresponding 4 groups of bridge type projections of second row mounting hole, the like, the corresponding 12 groups of bridge type projections of the 6th row's mounting hole.The quantity of bridge type projection is even number in this embodiment, and its effect is that air-flow flows through heat exchange fin along predetermined direction under the guiding of each bridge sheet both sides, is not subject to strong stop, so windage can not significantly increase.
[embodiment three]
As shown in Figure 5, in this embodiment, corresponding 1 group of first row mounting hole opens bridge, and corresponding 3 groups of second row mounting hole opens bridge, the like, the 6th corresponding 11 groups of row's mounting hole opens bridge.The quantity of bridge type projection is odd number in this embodiment, and its effect is the same, and air-flow flows through heat exchange fin along predetermined direction under the guiding of each bridge sheet both sides, is not subject to strong stop, so windage can not significantly increase.
[embodiment four]
As shown in Figure 2,3, in above-described embodiment one to three, the height that the utility model opens bridge is set as two kinds of specifications, bridge type projection 3 is high bridge, bridge type projection 3' is low bridge, and the height of low bridge 3' is the half of high bridge 3, and the height of described bridge type projection (high bridge) 3 is 0.6-2.5mm.Alternately change with low bridge 3' along air-flow direction high bridge 3, the effect destroying boundary layer of air can be increased, make each open large as far as possible the playing a role of bridge.Carried out analog study to heat exchange fin of the present utility model, result shows, exchange capability of heat of the present utility model exceeds about 30% than general Kaifeng fin, and the general slitted fin of resistance ratios exceeds about 15%.The ratio that the ratio resistance that heat exchange increases increases is high, good combination property.
[embodiment five]
As shown in Figure 6, in embodiment two, in unit, (what often row row mounting hole was corresponding is a unit) bridge type projection is even number, and the change roughly change in quadratic function curve of height, is shown below:
wherein n represents bridge type bump count in a unit, and y represents bridge type rising height, and x represents the distance of each unit symmetric arrays center line of bridge type projection centre-to-centre spacing, and a desirable 11-15, b get the half of low bridge height, as b=0.8.
Adopt in this way, as the air flows past, air-flow can flow along bridge type projection, because bridge type projection is that quadratic function curve is arranged, both sides are high, middle low, and middle part is closest to heat exchanger tube, bridge type projection low point temperature, higher than bridge type projection height point temperature, effectively can increase heat transfer temperature difference, thus increase heat exchange efficiency.
[embodiment six]
As shown in Figure 7, in embodiment three, in unit, bridge type projection is odd number, and the change of height is Gauss normal distribution curvilinear motion,
when σ=0.5, μ=0,
y represents the height of bridge type projection, x represents the distance of each unit symmetric arrays center line of bridge type projection centre-to-centre spacing, Gaussian function curve evenly declines gradually respectively to the left and right sides by middle, not only can increase the effect destroying boundary layer of air, and be uniformly distributed due to the normal state of Gaussian Profile, can also windage be efficiently reduced, increase heat exchange efficiency.
The utility model adopts the fin after optimizing compared with the fin used of indirect air cooling system in the past, on the one hand, because the bridge sheet spacing of air flowing upstream is larger, Kaifeng density is little, when air flows through bridge sheet, make front-seat temperature boundary layer disturbance less, but increase the temperature difference of air and rear row's heat exchanger, enhance the heat transfer effect of rear row's heat exchanger; On the other hand, the windage of air when front-seat is little, thus make the wind speed through arranging later larger, rear row's bridge sheet spacing is little, Kaifeng density is high, can increase the effect destroying boundary layer of air, and the height of bridge sheet alternately arranges the effect further enhancing and destroy boundary layer of air, make each bridge sheet play maximum effect, thus enhance the overall heat exchange effect of heat exchanger.
The utility model reasonably design bridge plate shape, highly, quantity, arrangement form etc., significantly improve exchange capability of heat, improve heat exchange efficiency and Energy Efficiency Ratio.Under the prerequisite of tower body size constancy, the ratio that heat exchange amount increases is greater than the ratio that resistance increases.Namely, when consuming identical pump merit, exchange capability of heat is larger.Therefore use efficient air-cooled heat exchanger of the present utility model can optimize power station 1,000,000 unit design, save considerable investment.
Above embodiment is the unrestricted the technical solution of the utility model in order to explanation only.Therefore, the amendment or the local that do not depart from the utility model spirit and scope are replaced, and should be encompassed in the middle of protection domain of the present utility model.
Claims (10)
1. the heat exchanger for power station 1,000,000 unit indirect air cooling system, described radiator comprises heat dissipation base and radiating fin, wherein said radiating fin is located on heat dissipation base, it is characterized in that, described radiating fin is offered the heat exchange base tube mounting hole that many rows are parallel, often all offer bridge type projection between any two adjacent heat exchange base tube mounting holes in row, the two ends of described bridge type projection are connected with fin body, for becoming to be less than or equal to the face of an angle of 90 degrees with fin body.
2. heat exchanger according to claim 1, it is characterized in that, described radiator meets following formula: d=n*d1+ (n-1) * d2, wherein d is the diameter of each heat exchange base tube mounting hole, n is the quantity of often arranging bridge type projection corresponding to heat exchange base tube mounting hole, d1 is the width of each bridge type projecting tip, and d2 often arranges vertical interval between adjacent bridge type projection corresponding to heat exchange base tube mounting hole; Along air-flow direction, the bridge quantity of opening of often arranging mounting hole corresponding increases.
3. heat exchanger according to claim 2, is characterized in that, what what rear row's mounting hole was corresponding opened the last row of bridge number ratio opens many one of bridge quantity.
4. heat exchanger according to claim 2, is characterized in that, often arranging bridge quantity of opening corresponding to mounting hole is even number, and the bridge quantity of opening of first row mounting hole is two, and the bridge quantity of opening of rear row's mounting hole opens many two of bridge quantity successively than last row.
5. heat exchanger according to claim 2, is characterized in that, often arranging bridge quantity of opening corresponding to mounting hole is odd number, and the bridge quantity of opening of first row mounting hole is one, and the bridge quantity of opening of rear row's mounting hole opens many two of bridge quantity successively than last row.
6. heat exchanger according to claim 2, is characterized in that, often arranging bridge quantity of opening corresponding to mounting hole is even number, and bridge quantity of opening of first and second row's mounting hole is two, after the bridge quantity of opening of every two row's mounting holes open many two of bridge quantity successively than front two rows; Or often arranging bridge quantity of opening corresponding to mounting hole is odd number, bridge quantity of opening of first and second row's mounting hole is three, after the bridge quantity of opening of every two row's mounting holes open many two of bridge quantity successively than front two rows.
7. heat exchanger according to claim 3, is characterized in that, described bridge type projection is divided into high bridge and low bridge, and high bridge and low bridge are alternately arranged, and wherein the height of low bridge is the half of high bridge.
8. heat exchanger according to claim 4, is characterized in that, the height change of often arranging bridge type projection in a unit corresponding to mounting hole is quadratic function curve change.
9. heat exchanger according to claim 5, is characterized in that, the height change of often arranging bridge type projection in a unit corresponding to mounting hole is Gauss normal distribution curvilinear motion.
10. heat exchanger according to claim 3, is characterized in that, the height of described high bridge is 0.6-2.5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420439621.5U CN204043467U (en) | 2014-08-06 | 2014-08-06 | A kind of heat exchanger for power station 1,000,000 unit indirect air cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420439621.5U CN204043467U (en) | 2014-08-06 | 2014-08-06 | A kind of heat exchanger for power station 1,000,000 unit indirect air cooling system |
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| CN204043467U true CN204043467U (en) | 2014-12-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420439621.5U Withdrawn - After Issue CN204043467U (en) | 2014-08-06 | 2014-08-06 | A kind of heat exchanger for power station 1,000,000 unit indirect air cooling system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142084A (en) * | 2014-08-06 | 2014-11-12 | 北京首航艾启威节能技术股份有限公司 | Heat exchanger for indirect air-cooling system of millions of units of power station |
| CN109163596A (en) * | 2018-10-11 | 2019-01-08 | 大冶斯瑞尔换热器有限公司 | A kind of novel flow-disturbing fin |
-
2014
- 2014-08-06 CN CN201420439621.5U patent/CN204043467U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142084A (en) * | 2014-08-06 | 2014-11-12 | 北京首航艾启威节能技术股份有限公司 | Heat exchanger for indirect air-cooling system of millions of units of power station |
| CN109163596A (en) * | 2018-10-11 | 2019-01-08 | 大冶斯瑞尔换热器有限公司 | A kind of novel flow-disturbing fin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141224 Effective date of abandoning: 20160420 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20141224 Effective date of abandoning: 20160420 |