CN103808011B - Cast aluminum heat exchange sheet for fuel gas hot water device - Google Patents
Cast aluminum heat exchange sheet for fuel gas hot water device Download PDFInfo
- Publication number
- CN103808011B CN103808011B CN201410060955.6A CN201410060955A CN103808011B CN 103808011 B CN103808011 B CN 103808011B CN 201410060955 A CN201410060955 A CN 201410060955A CN 103808011 B CN103808011 B CN 103808011B
- Authority
- CN
- China
- Prior art keywords
- flow
- water channel
- water
- disturbing
- heat exchange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Details Of Fluid Heaters (AREA)
Abstract
The invention relates to a cast aluminum heat exchange sheet for a fuel gas hot water device. The cast aluminum heat exchange sheet comprises a sheet body (1), a water way (2) is arranged inside the sheet body (1), and a heat exchange column (3) is arranged on the surface of the sheet body (1). The cast aluminum heat exchange sheet is characterized in that turbulent flow lines (21) are arranged on the wall of the water way (2). According to the cast aluminum heat exchange sheet, the turbulent flow lines are arranged on the wall of the water way, water flow disturbance is carried out from the wall to the center of water flow, the space rotational flow and turbulent state is formed by water flow bodies in the water way, the thickness of retention layers in the water way can be effectively reduced, the convection heat-exchange heat resistance in the water way can be reduced, the wall of the water way can be flushed, sedimentation of sundries in the water way can be avoided, and the heat exchange efficiency can be accordingly improved.
Description
Technical field
The present invention relates to a kind of cast aluminium heat exchanger fin for gas-fired water heater, be particularly suited for boiler, gas fired-boiler or
The equipment such as gas-heating water heater.
Background technology
According to theory analysis and experimentation, when fluid is in turbulence state, fluid is divided into turbulent flow main body, cushion and delay
Layer, cushion and retention layer are referred to as boundary region.Meanwhile, the factor of impact fluid convection heat transfer coefficient α has the spy of heat-transfer equipment
Property size l, the density p of fluid, viscosity, mu, the physical quantity such as specific heat cp, heat conductivity λ and flow velocity u, their available generic functions close
Being formula to express：α=f(l、ρ、μ、cp、λ、u).Wherein heat conductivity λ depends on the thermal resistance of convection heat transfer' heat-transfer by convection, convection heat transfer' heat-transfer by convection thermal resistance master
To be made up of the thermal conduction resistance of boundary region, boundary layer thickness is bigger, convection heat transfer' heat-transfer by convection thermal resistance is bigger.
In prior art, cast aluminium heat exchanger fin, on strengthening heat convection technology, uses and increases in the water channel of heat exchanger fin
Scramble fluidization tower to improve flow regime in water channel for the current, this mode is stronger to the flowing main body interference of current, favorably
In making flowing main body form turbulent condition, thus reducing cushion thermal resistance, increase convection heat transfer' heat-transfer by convection efficiency.But because flow-disturbing acts on
Bodies of fluid position, flow-disturbing action direction is mixed and disorderly, and flow disturbance is carried out from fluid center to border, after buffered layer effect, right
Retention layer action effect is relatively low, and retention layer thermal resistance reduces inconspicuous.For overcoming drawbacks described above, spy is to for gas-fired water heater
Cast aluminium heat exchanger fin is improved.
Content of the invention
The technical problem to be solved is to provide for a kind of cast aluminium heat exchanger fin for gas-fired water heater, its energy
Improve heat exchange efficiency.
Heat convection can be divided into laminar flow and turbulent flow according to the flow regime of fluid, and both heat-transfer mechanisms have the area of essence
Not.When fluid is in laminar flow, fluid does not mix motion along wall laminar flow, i.e. fluid on direction of heat flow, and heat transfer is basic
The upper conduction of heat relying on molecule diffusion is carrying out；When fluid is in turbulent flow, the heat transfer of turbulent main body causes for eddy current effect
Thermal convection current, in the viscous flow internal layer of near wall still be conduction of heat, therefore under turbulent condition, impact heat convection main
Factor is wall retention layer thickness.I.e. under equal conditions, the thickness reducing fluid retention layer can effectively reduce convection heat transfer' heat-transfer by convection
Thermal resistance, increase heat transfer efficiency.Increase turbulence columns to disturb the flow regime of current although making current main body produce in water channel
Unstable weak turbulent condition, but flow disturbance is carried out from center to wall, and closing on, the turbulent water effect of wall position is weaker, stagnant
Stay layer thicker, the heat exchange efficiency lifting of heat exchanger is limited, and flow disturbance should be made to be carried out by the wall facing fluid center of water channel.
Therefore, the present invention solves its technical problem and employed technical scheme comprise that：It includes lamellar body, is provided with water inside lamellar body
Road, pellet surface is provided with heat exchange post, and water channel wall is provided with flow-disturbing stricture of vagina.Heat exchange post is used for absorbing the heat of high-temperature flue gas, waterway wall
The flow-disturbing stricture of vagina in face makes current main body produce disturbance, forms turbulent flow, and flow disturbance is carried out by waterway wall facing fluid center, from
And effectively reduce the thickness of fluid retention layer, improve heat transfer effect.
Further, described flow-disturbing stricture of vagina is obliquely installed, and yet further, the flow-disturbing stricture of vagina on water channel relative wall reversely sets
Put, make current form the space eddy flow turbulent flow of substantially helically state flowing in water channel.
Further, the width D of described water channel upstream region flow-disturbing stricture of vagina is more than the width D of water channel downstream area flow-disturbing stricture of vagina,
The width of flow-disturbing stricture of vagina is bigger, and flow-disturbing effect is stronger.
Further, described water channel upstream region flow-disturbing stricture of vagina and the angle α of water (flow) direction are more than water channel downstream area flow-disturbing
Stricture of vagina and the angle α of water (flow) direction.Yet further, described angle α is 15 ° 45 °, and angle α is bigger, and flow-disturbing effect is stronger.
Further, it is provided with turbulence columns in the water channel of described upstream region.Current are in the common work of turbulence columns and flow-disturbing stricture of vagina
With under, turbulent water is carried out by wall and middle of the stream simultaneously, is conducive to reducing heat convection thermal resistance in water channel further, effectively
Improve heat exchange efficiency.
Further, the sectional area of described water channel gradually decreases from upstream to downstream.Because inside water channel, bending is complicated, resistance
Power is larger, and the flow velocity of current is swum over to water channel downstream from water channel and is gradually lowered, but by reducing the sectional area of water channel, can improve
The flow velocity of current, thus the flow-disturbing effect strengthening flow-disturbing stricture of vagina is strong.
Further, the water inlet of described water channel is arranged on lamellar body bottom, and outlet is arranged on lamellar body top.
Further, described heat exchange post is distributed in lamellar body both sides, and the adjacent heat exchange post of two rows staggers setting.
The present invention produced beneficial effect compared with background technology：Because the present invention arranges flow-disturbing stricture of vagina in water channel wall,
Turbulent water is carried out from wall to middle of the stream, makes aqueous fluid be internally formed space eddy flow turbulent condition in water channel, therefore it can have
Effect reduces the thickness of retention layer in water channel, and in reduction water channel, heat convection thermal resistance is moreover it is possible to wash away runner wall, it is to avoid debris are in water
Deposit in road, thus improving heat exchange efficiency.
Brief description
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the perspective cross-sectional schematic diagram of Fig. 1；
Fig. 3 is the wall structure schematic diagram of left part in Fig. 2；
Fig. 4 is the wall structure schematic diagram of right part in Fig. 2；
Fig. 5 is the partial enlarged drawing of flow-disturbing stricture of vagina 21 in water channel 2；
The schematic diagram one that Fig. 6 is applied in combination for the present invention；
The schematic diagram two that Fig. 7 is applied in combination for the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings, with the condensation pressure combustion heat exchanger using this cast aluminium heat exchanger fin composition in gas fired-boiler it is
Example, illustrates the structure and working principle of this cast aluminium heat exchanger fin.Arrow in Fig. 5 represents water (flow) direction.Dotted arrow generation in Fig. 6
Table flow of flue gas direction, the solid arrow in water channel 2 represents water flow rotary direction, and the circle with point in water channel 2 represents current
Direction be vertical paper outwards, the circle of band fork represents water (flow) direction for vertical paper inwards, in water channel 2 circle quantity number
Represent the size of discharge.Temperature province dividing line in Fig. 6 is water channel region in lamellar body 1（Top water channel roof and bottom water
Region between road diapire）Center line.
Referring to Fig. 1 and Fig. 2, cast aluminium heat exchanger fin includes lamellar body 1, is provided with water channel 2 inside lamellar body 1, and the water inlet 23 of water channel 2 sets
Put in lamellar body 1 bottom, outlet 24 is arranged on lamellar body 1 top, water channel 2 wall is provided with flow-disturbing stricture of vagina 21.Lamellar body 1 surface is provided with heat exchange
Post 3, heat exchange post 3 is distributed in lamellar body 1 both sides, and the adjacent heat exchange post 3 of two rows staggers setting.During use, lamellar body 1 top（I.e.
Water channel downstream）Close to the combustor of gas-fired water heater, flue-gas temperature is higher, referred to as " high-temperature region ", lamellar body 1 bottom（I.e. water channel
Upstream）Flue-gas temperature is relatively low, claims into " low-temperature space ".
Referring to Fig. 2, Fig. 3 and Fig. 4, flow-disturbing stricture of vagina 21 is obliquely installed, and the flow-disturbing stricture of vagina 21 on water channel 2 relative wall reversely sets
Put.It is provided with turbulence columns 22 in the water channel 2 of upstream region.The sectional area of water channel 2 gradually decreases from upstream to downstream.Referring to Fig. 5, water
The width D of road 2 upstream region flow-disturbing stricture of vagina 21 is more than the width D of water channel 2 downstream area flow-disturbing stricture of vagina 21, water channel 2 upstream region flow-disturbing
The angle α of stricture of vagina 21 and water (flow) direction is more than the angle α of water channel 2 downstream area flow-disturbing stricture of vagina 21 and water (flow) direction, and angle α is 15 °
45°.Arranged in the space of runner wall according to flow-disturbing stricture of vagina 21, current are subject to wall flow-disturbing stricture of vagina 21 directionality choked flow in flow process
Effect, makes current form tangential flowing in wall.Referring to Fig. 6, the sectional area of water channel gradually decreases from upstream to downstream, lamellar body 1
Upper pyrometer area（I.e. water channel downstream）Water channel section little, flow rate of water flow is high, and the effect of flow-disturbing stricture of vagina 21 flow-disturbing is strong, and current are to wall
Tangential souring is strong；Lamellar body 1 bottom low-temperature space（I.e. water channel upstream）Water channel section big, flow rate of water flow is low, flow-disturbing stricture of vagina 21
Flow-disturbing effect is weaker.The water channel of lamellar body 1 bottom low-temperature space pass through increase turbulence columns 22 simultaneously the width D of overstriking flow-disturbing stricture of vagina 21 and plus
Big flow-disturbing stricture of vagina 21 to strengthen flow-disturbing effect with the angle α of water channel, so that low-temperature space turbulent water is carried out by wall and center simultaneously, increases
High turbulence effect.By above structure, current are made to form strong space eddy flow Turbulence Flow, water impact water in water channel 2
The wall in road 2, reduce wall retention layer thickness, take away simultaneously runner wall deposition debris, heat exchange efficiency can not only be improved moreover it is possible to
Improve the safe handling of the combustion gas cast aluminium boiler using this condensation pressure combustion heat exchanger.Additionally, the sectional area of water channel is from upper
Swim the variation pattern gradually decreasing to downstream various：Can be successively to successively decrease, i.e. six layers of water channel from the bottom up as shown in Figure 6,
Every layer of water channel sectional area all differs, and ground floor sectional area is maximum, and layer 6 is minimum；Can also be that given layer is not successively decreased, if having
The sectional area of dried layer water channel can be identical, six layers of water channel from the bottom up as shown in Figure 7, and ground floor sectional area is maximum, second and third
Layer cross section amasss identical and is less than ground floor, and fourth, fifth, six layer cross sections amass identical and minimum.
Referring to Fig. 6 and Fig. 7, two block piece bodies 1 are used in combination, and are in V-shape cavity in upper pyrometer area, are conducive to cigarette
Conductance stream.During gas fired-boiler work, the high-temperature flue gas that combustion gas produces flow from the top down, and high-temperature flue gas pass through two lamellar body 1 surface
Heat exchange post 3 after, the heat of flue gas is absorbed by heat exchange post 3, become low-temperature flue gas discharge.Current in water channel 2 are in flow-disturbing stricture of vagina 21
Under turbulence columns 22 effect, formed and stablize strong space eddy flow Turbulence Flow, the heat expeditiously absorbing heat exchange post 3 changes
Walk.
This cast aluminium heat exchanger fin utilizes the flow-disturbing stricture of vagina 21 of water channel 2 wall that current are produced with tangential flow-disturbing effect, makes current in water
With stable space eddy flow Turbulence Flow in road 2, acted on by the tangential flow-disturbing of wall, make current that wall is formed and strongly tangentially rush
Brush, destroys wall retention layer thickness, effectively reduces turbulent convection heat transfer' heat-transfer by convection thermal resistance, improves heat exchange efficiency；Additionally, using eddy flow flowing
Continuous erosion to wall, makes the debris that water channel 2 wall deposits be rushed at fluid center and is taken away by current, plays self-cleaning and makees
With improving safety and the heat transfer effect of gas water-heating furnace.Therefore, under the premise of power demand identical, the present invention has
There is water channel short, compact conformation, the advantages of lacking using material, can effectively reduce production cost.
Claims (9)
1. a kind of cast aluminium heat exchanger fin for gas-fired water heater, including lamellar body（1）, lamellar body（1）Inside is provided with water channel（2）, piece
Body（1）Surface is provided with heat exchange post（3）It is characterised in that：Described water channel（2）Wall is provided with flow-disturbing stricture of vagina（21）, water channel（2）Section
Amass and gradually decrease from upstream to downstream.
2. the cast aluminium heat exchanger fin for gas-fired water heater according to claim 1 it is characterised in that：Described flow-disturbing stricture of vagina
（21）It is obliquely installed.
3. the cast aluminium heat exchanger fin for gas-fired water heater according to claim 2 it is characterised in that：Described water channel（2）
Flow-disturbing stricture of vagina on relative wall（21）Oppositely arranged.
4. the cast aluminium heat exchanger fin for gas-fired water heater according to claim 1 it is characterised in that：Described water channel（2）
Upstream region flow-disturbing stricture of vagina（21）Width D be more than water channel（2）Downstream area flow-disturbing stricture of vagina（21）Width D.
5. the cast aluminium heat exchanger fin for gas-fired water heater according to claim 1 it is characterised in that：Described water channel（2）
Upstream region flow-disturbing stricture of vagina（21）It is more than water channel with the angle α of water (flow) direction（2）Downstream area flow-disturbing stricture of vagina（21）With water (flow) direction
Angle α.
6. the cast aluminium heat exchanger fin for gas-fired water heater according to claim 5 it is characterised in that：Described angle α is
15°—45°.
7. the cast aluminium heat exchanger fin for gas-fired water heater according to claim 1 it is characterised in that：Described upstream region
Water channel（2）Inside it is provided with turbulence columns（22）.
8. the cast aluminium heat exchanger fin for gas-fired water heater according to any one of claim 17 it is characterised in that：Institute
State water channel（2）Water inlet（23）It is arranged on lamellar body（1）Bottom, outlet（24）It is arranged on lamellar body（1）Top.
9. the cast aluminium heat exchanger fin for gas-fired water heater according to any one of claim 17 it is characterised in that：Institute
State heat exchange post（3）It is distributed in lamellar body（1）Both sides, the adjacent heat exchange post of two rows（3）Stagger setting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060955.6A CN103808011B (en) | 2014-02-24 | 2014-02-24 | Cast aluminum heat exchange sheet for fuel gas hot water device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410060955.6A CN103808011B (en) | 2014-02-24 | 2014-02-24 | Cast aluminum heat exchange sheet for fuel gas hot water device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103808011A CN103808011A (en) | 2014-05-21 |
| CN103808011B true CN103808011B (en) | 2017-02-08 |
Family
ID=50705150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410060955.6A Active CN103808011B (en) | 2014-02-24 | 2014-02-24 | Cast aluminum heat exchange sheet for fuel gas hot water device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103808011B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006699A (en) * | 2014-06-16 | 2014-08-27 | 中南大学 | Condensation type heat exchange plate and condensation type heat exchanger with same |
| CN106352551A (en) * | 2016-10-17 | 2017-01-25 | 孔明旺 | Combined condensing heat exchanger |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201621861U (en) * | 2010-03-01 | 2010-11-03 | 广东万和新电气股份有限公司 | Heat exchanger of gas water heater |
| CN202403586U (en) * | 2012-01-17 | 2012-08-29 | 安吉恒盛热能机械有限公司 | Turbulence type heat exchange tube |
| CN202853123U (en) * | 2012-09-20 | 2013-04-03 | 广东万和新电气股份有限公司 | Aluminum casting heat exchanger of gas stove |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2510729A1 (en) * | 1981-08-03 | 1983-02-04 | Auer Soc Ind | BOILER, TO BE CONNECTED TO A CENTRAL HEATING SYSTEM, OPERATING WITH LIQUID OR GASEOUS FUEL |
| CN201876172U (en) * | 2010-11-10 | 2011-06-22 | 北京派捷暖通环境工程技术有限公司 | In-tube intensified heating radiator |
| CN202057221U (en) * | 2011-05-16 | 2011-11-30 | 浙江前进有色金属铸造有限公司 | Heat exchanger with heat collecting nails |
| CN203837269U (en) * | 2014-02-24 | 2014-09-17 | 广东万和新电气股份有限公司 | Cast aluminum heat exchanging piece used for fuel gas hot water unit |
-
2014
- 2014-02-24 CN CN201410060955.6A patent/CN103808011B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201621861U (en) * | 2010-03-01 | 2010-11-03 | 广东万和新电气股份有限公司 | Heat exchanger of gas water heater |
| CN202403586U (en) * | 2012-01-17 | 2012-08-29 | 安吉恒盛热能机械有限公司 | Turbulence type heat exchange tube |
| CN202853123U (en) * | 2012-09-20 | 2013-04-03 | 广东万和新电气股份有限公司 | Aluminum casting heat exchanger of gas stove |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103808011A (en) | 2014-05-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204661602U (en) | The spiral Riser waste heat recovery device for coke oven of a kind of close muscle | |
| CN103808011B (en) | Cast aluminum heat exchange sheet for fuel gas hot water device | |
| CN106959026A (en) | A kind of laterally intermittent stagnation coiled pipe membrane wall powder high-efficiency heat exchanger | |
| CN105021080B (en) | Wear-resistant extended surface tube and heat exchanger | |
| CN202048667U (en) | Boiler | |
| CN104930540B (en) | The flow-guiding structure of air preheater smoke inlet | |
| CN202074674U (en) | Heat exchanger of gas water heater | |
| CN203837269U (en) | Cast aluminum heat exchanging piece used for fuel gas hot water unit | |
| CN101929670A (en) | Oilfield steam injection boiler | |
| CN206818021U (en) | Laterally intermittent stagnation coiled pipe membrane wall powder high-efficiency heat exchanger | |
| CN107345770A (en) | A kind of square tube heat exchanger | |
| CN207146923U (en) | A kind of heat exchanging piece | |
| CN204963640U (en) | Extended surface tube and heat exchanger resistance to wear | |
| CN206593309U (en) | A kind of heat absorbing sheet of gas heater | |
| CN205664708U (en) | Helical fin heat transfer device | |
| CN204730236U (en) | The even gas distribution structure of air preheater smoke inlet | |
| CN105043151A (en) | Finned tube and heat exchanger | |
| CN203940606U (en) | A kind of two drum longitudinal Honeycomb briquet hot-water boiler | |
| CN202770299U (en) | Composite material heat-exchanger tube for flue gas waste heat recovery of boiler | |
| CN201382727Y (en) | Heat exchanger | |
| CN206036986U (en) | Be applied to steam boiler's omega type flue gas and surround type heat transfer flow | |
| CN104848517B (en) | A kind of heat exchanger and use its energy saving gas burning water heater | |
| CN204730237U (en) | The flow-guiding structure of air preheater smoke inlet | |
| CN203824073U (en) | Normal-pressure inverse-burning boiler | |
| CN206496551U (en) | A kind of single flow condenser |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |