CN202485522U - Finned tube for direct air cooled condenser - Google Patents
Finned tube for direct air cooled condenser Download PDFInfo
- Publication number
- CN202485522U CN202485522U CN2012200846971U CN201220084697U CN202485522U CN 202485522 U CN202485522 U CN 202485522U CN 2012200846971 U CN2012200846971 U CN 2012200846971U CN 201220084697 U CN201220084697 U CN 201220084697U CN 202485522 U CN202485522 U CN 202485522U
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- fin
- cooled condenser
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- section
- finned tube
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Abstract
The utility model relates to a finned tube for a direct air cooled condenser, which is applicable to the field of waste steam condensation such as a steam turbine in a thermal power plant, a steam turbine in the chemical engineering industry and the space division industry, etc. The finned tube comprises a base tube (1) and a fin (2), wherein the cross section of the base tube (1) is wedge-shaped, and the size of the base tube (1) is changed into small from large along the air flowing direction; and the cross section of the fin (2) is ladder-shaped, and the size of the fin (2) is changed into large from small along the air flowing direction. According to the finned tube for the direct air cooled condenser provided by the utility model, the base pipe is wedge-shaped, so that the volume of hot air after the air expands can be contained, therefore, the flow speed of the air is invariably kept when the air flows through the finned tube, the air side resistance of the finned tube for the direct air cooled condenser can be reduced, the aim of the reduction of the fan energy consumption can be achieved, and the requirement of the economical society can be met. The finned tube for the direct air cooled condenser provided by the utility model is obviously small in resistance when being used for the direct air cooled condenser of the thermal power plant.
Description
Technical field
The utility model relates to a kind of finned tube of direct air cooled condenser.Be applied to exhaust steam condensation fields such as thermal power plant steam turbine, chemical industry and empty branch trade steam turbines.
Background technology
The exhaust steam that steam turbine and steam turbines are discharged need be condensed into water, delivers to boiler and recycles.For the conserve water resource, what be used for that the direct air cooled condenser of exhaust steam condensation uses at home and abroad is very general.The employed heat exchange element of direct air cooled condenser is the finned tube of the outer enhanced heat exchange of pipe, although have multiple form, and the finned tube of using at most at present that still is called single row of tubes.Single row of tubes is made up of parent tube and fin, and the shape of cross section of parent tube is the rectangle flat tube, and its two ends are circular-arc; The cross section of fin also is a rectangle, along the shape that is shaped as serpentine bend longitudinally of parent tube.The material of single row of tubes parent tube is single face covering aluminum plate or single face alclad sheet, and the fin material is an aluminum or aluminum alloy, and parent tube is connected through soldering with fin.
Single row of tubes also exists deficiency.Since the rectangular shape of parent tube and fin, the postpone of single row of tubes in condenser " " word cloth, and the size (or area) of the air flow passage between the outer fin of formed parent tube is constant; Cold air constantly is heated between the fin of parent tube both sides after getting into this passage along the length direction of parent tube cross section, and temperature raises and will cause that density reduces, volume increases, and the flow velocity of air increases simultaneously, and is the highest at the exit flow velocity that arrives finned tube; In this process,, the air velocity increase also increases along with will causing resistance.Result of the test shows, when the air temperature rise reached 30 ℃ of left and right sides, under the condition of same air mass flow, the air drag during single row of tubes hot increased about 30% during than cold conditions (not heating).
Along with thermal power plant, chemical industry and empty industry-specific unit specification constantly enlarge; The size of air cooling tubes condenser also constantly increases; The length of finned tube and quantity increase, the cooling unit of condenser and blower fan more, and the resistance of air side is just more obvious to the influence of blower fan power consumption.Now, use the direct air cooled condenser of single-row back-fin pipe, the power consumption of blower fan is very big, can not satisfy user's requirements of saving energy.
Summary of the invention
The purpose of the utility model is to overcome above-mentioned deficiency, provides a kind of air side resistance littler direct air cooled condenser finned tube, to satisfy user's higher energy-conservation requirement.
The purpose of the utility model is achieved in that a kind of direct air cooled condenser finned tube; Comprise parent tube and fin, the cross section of parent tube and fin is elongated, and that the both ends of parent tube cross section are is circular-arc, the side is the plane; Fin is the serpentine bend shape along the longitudinal direction of parent tube; Parent tube is connected through soldering with fin, and said parent tube shape of cross section is a wedge shape, and its width dimensions along air-flow direction from large to small; Towards the leading section width dimensions of the cross section of air stream greater than the rearward end width dimensions; Said fin shape of cross section is trapezoidal, and its size is changed from small to big along air-flow direction, towards the leading section width dimensions of the cross section of air stream less than the rearward end width dimensions.
The utility model direct air cooled condenser finned tube, the cross sectional shape of said fin are right-angled trapezium or isosceles trapezoid.
The utility model direct air cooled condenser finned tube, the material of said parent tube are the steel aluminium composite material that single face covers aluminium, or the steel plate of aluminizing for single face, and alclad or aluminium coated are at the parent tube outer surface.
The utility model direct air cooled condenser finned tube, the material of said fin are aluminum or aluminum alloy.
As everyone knows, can expand when air is heated, when the air of expansion flowed between parent tube, flow velocity can increase if the channel size that flows remains unchanged, thereby caused that resistance becomes big.A kind of direct air cooled condenser finned tube of the utility model; Parent tube adopts wedge shape, air flow passage is raise along with temperature and enlarges, and has held the volume that hot-air increased after air expands; The flow velocity of air is remained unchanged when flowing through finned tube; Have the condenser of reduction finned tube air side drag effect, reach the purpose that reduces fan energy consumption, meet the requirement of conservation-minded society.Trapezoidal fin in the utility model can make air remain between fin and flow, and air can or not cause the decline of heat exchange efficiency to the fin external short circuit.
When a kind of direct air cooled condenser finned tube of the utility model was used for the large-size thermal power plant direct air cooled condenser, the advantage that its resistance is little can be more remarkable.
Description of drawings
Fig. 1 is the cross-sectional view of prior art single-row back-fin pipe.
Fig. 2 is for implementing embodiment 1 cross sectional representation of the utility model.
Fig. 3 be among the embodiment 1 fin along the serpentine bend shape vertical view of parent tube length direction.
Fig. 4 is for implementing embodiment 2 cross sectional representation of the utility model.
Reference numeral among the figure:
Cold air A
Hot-air B.
The specific embodiment
As shown in Figure 2, Fig. 2 is for implementing embodiment 1 cross sectional representation of the utility model.Can find out that by Fig. 2 the utility model direct air cooled condenser finned tube is made up of parent tube 1 and fin 2.The cross section of parent tube 1 and fin 2 is elongated, and the both ends of parent tube 1 cross section are circular-arc or rounded, and the side is the plane; Fin 2 is the serpentine bend shape along the longitudinal direction of parent tube; Parent tube 1 and fin 2 are connected through soldering, and said parent tube 1 shape of cross section is a wedge shape, and its width dimensions along air-flow direction from large to small; Towards the leading section width dimensions of the cross section of air stream greater than the rearward end width dimensions, said fin 2 shape of cross sections do
The right angleTrapezoidal, its size is changed from small to big along air-flow direction, towards the leading section width dimensions of the cross section of air stream less than the rearward end width dimensions.
The material of said parent tube is the Steel-aluminium composite board that single face covers aluminium, or the single face steel plate of aluminizing, and alclad (or aluminium coated) is at the parent tube outer surface.The material of said fin is an aluminum or aluminum alloy.
In embodiment 1, the length dimension of its cross section of parent tube is 200-300mm, leading section width dimensions 18-24mm, rearward end width dimensions 12-20mm.The length dimension of the cross section of fin 2 is 180-285mm, leading section width dimensions 16-20mm, rearward end width dimensions 19-26mm.
Fig. 3 is the serpentine bend shape (overlook) of fin 2 along parent tube direction length.
Embodiment 2:
Fig. 4 is for implementing embodiment 2 cross sectional representation of the utility model.Can be found out that by Fig. 4 a kind of direct air cooled condenser finned tube of the utility model is made up of parent tube 1 and fin 2, its parent tube cross sectional shape is a wedge shape; Fin 2 cross sectional shapes are isosceles trapezoid, and fin 2 is along the serpentine bend shape of parent tube direction length; Parent tube 1 is close with embodiment 1 with fin 2 sizes.Present embodiment 2 and the difference of embodiment 1 mainly are that the shape of fin 2 is different.
Claims (6)
1. a direct air cooled condenser finned tube comprises parent tube (1) and fin (2), and the cross section of parent tube (1) and fin (2) is elongated; The both ends of parent tube (1) cross section are circular-arc; The side is the plane, and fin (2) is the serpentine bend shape along the longitudinal direction of parent tube, and parent tube (1) is connected through soldering with fin (2); It is characterized in that: said parent tube (1) shape of cross section is a wedge shape; Its width dimensions along air-flow direction from large to small, towards the leading section width dimensions of the cross section of air stream greater than the rearward end width dimensions, said fin (2) shape of cross section is trapezoidal; Its size is changed from small to big along air-flow direction, towards the leading section width dimensions of the cross section of air stream less than the rearward end width dimensions.
2. a kind of direct air cooled condenser finned tube according to claim 1, the cross sectional shape that it is characterized in that said fin (2) is right-angled trapezium or isosceles trapezoid.
3. a kind of direct air cooled condenser finned tube according to claim 1 and 2, the length dimension that it is characterized in that the cross section of said parent tube (1) is 200-300mm, leading section width dimensions 18-24mm, rearward end width dimensions 12-20mm.
4. a kind of direct air cooled condenser finned tube according to claim 1 and 2, the length dimension that it is characterized in that the cross section of said fin (2) is 180-285mm, leading section width dimensions 16-20mm, rearward end width dimensions 19-26mm.
5. a kind of direct air cooled condenser finned tube according to claim 1 and 2, the material that it is characterized in that said parent tube (1) are the steel aluminium composite material that single face covers aluminium, or the steel plate of aluminizing for single face, and alclad or aluminium coated are at the parent tube outer surface.
6. a kind of direct air cooled condenser finned tube according to claim 1 and 2, the material that it is characterized in that said fin (2) is an aluminum or aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200846971U CN202485522U (en) | 2012-03-08 | 2012-03-08 | Finned tube for direct air cooled condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200846971U CN202485522U (en) | 2012-03-08 | 2012-03-08 | Finned tube for direct air cooled condenser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202485522U true CN202485522U (en) | 2012-10-10 |
Family
ID=46959939
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200846971U Expired - Fee Related CN202485522U (en) | 2012-03-08 | 2012-03-08 | Finned tube for direct air cooled condenser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202485522U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607313A (en) * | 2012-03-08 | 2012-07-25 | 双良节能系统股份有限公司 | Direct air-cooling condenser finned tube |
| CN113970253A (en) * | 2020-07-22 | 2022-01-25 | 成都聚实节能科技有限公司 | Large-section air-cooling condensing single-row pipe |
-
2012
- 2012-03-08 CN CN2012200846971U patent/CN202485522U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607313A (en) * | 2012-03-08 | 2012-07-25 | 双良节能系统股份有限公司 | Direct air-cooling condenser finned tube |
| CN113970253A (en) * | 2020-07-22 | 2022-01-25 | 成都聚实节能科技有限公司 | Large-section air-cooling condensing single-row pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20200308 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |