CN106595378A - Novel tubular type high-efficiency heat exchanger - Google Patents
Novel tubular type high-efficiency heat exchanger Download PDFInfo
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- CN106595378A CN106595378A CN201510671967.7A CN201510671967A CN106595378A CN 106595378 A CN106595378 A CN 106595378A CN 201510671967 A CN201510671967 A CN 201510671967A CN 106595378 A CN106595378 A CN 106595378A
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Abstract
The invention provides novel packing for packing a tubular type heat exchange tube, and a simple re-fitting method for a high-efficiency heat exchanger capable of remarkably improving heat transfer efficiency. Novel spherical wire net packing and internal hyoid arch ring-shaped packing are developed and verified as high-efficiency packing with most exploring potential for enhancing heat transfer of the heat exchanger. By optimizing technological conditions, a convective heat-transfer coefficient and heat exchange amount of the novel packing can be improved by about 200% in comparison with those of a hollow tube. According to the comprehensive evaluation results of the evaluation criteria (PEC) for enhancing heat transfer, when a Reynolds number is smaller than 7000, comprehensive heat transfer performances of internal hyoid arch ring-shaped packing with an inner diameter being 20 mm, internal hyoid arch ring-shaped packing with an inner diameter being 25 mm and spherical wire net packing with an inner diameter being 25 mm, which are packed in a single tube with an inner diameter being 25 mm, can be remarkably superior to those of materials inserted into coils. The novel packing has important guiding significance and an important application value in developing the high-efficiency heat exchanger and improving heat exchange efficiency of an existing tubular type heat exchanger, and meets the application requirements of being simple and convenient, economical and efficient.
Description
Technical field
The present invention relates to new turbulent element combines enhanced heat transfer performance with tubular heat exchanger
Energy-efficient equipment, it is adaptable to single-phase or heterogeneous fluid convection heat transfer' heat-transfer by convection, steam condensation convection current
Heat transfer, belongs to technical field of heat exchange.
Background technology
Heat exchanger takes sizable proportion in chemical industry investment, improves exchanger heat performance and helps
In reduce equipment investment, make full use of recovery and using waste heat, energy-saving, save space and
Building bearing.According to statistics, in steam power plant, if boiler is also served as into heat transmission equipment, change
The investment of hot device accounts for 70% or so of whole power plant's gross investment, in general petrochemical enterprise
In, the investment of heat exchanger will account for the 40%-50% of fully invested, in modern petrochemical enterprise
30%-40% is accounted for, has two pieces to be heat exchanger in four big parts of refrigerated air-conditioning system.Tubulation
Formula heat exchanger is the common equipment of industrial heat exchange, and pipe heat exchanger has that selection range is wide, heat exchange
Surface clean convenience, strong adaptability, disposal ability be big and high temperature resistant, it is high pressure resistant the advantages of,
Leading position is occupied in heat transmission equipment.Heat transfer process reinforcing is the master of energy-efficient equipment
Want one of direction.In idle reinforcement technique, the inner and outer pipes of pipe heat exchanger increase fin can be with
Raising heat transfer effect, but finned heat exchanger tube processed complex, easy scale effect heat exchange efficiency,
And difficult cleaning.In order to overcome these shortcomings, the interposer for having many similar fins is substituted in fin
It is placed in heat exchanger tube.Disk-shaped wafers, helix, tie spiral have been put in heat exchanger
Piece, wire netting, spiral brush sifter, static mixer, intersect saw tooth belt, trapezoid belt, around filigree,
Various interposer such as band iron, twist iron, star-like to improve the research and invention of heat exchange efficiency, this
A little interposer really reach enhanced heat exchange effect, and big portion because increased flow disturbance
Easy cleaning and heat exchange efficiency do not improve little point to have the shortcomings that complex structure, fouling, only knob
Band and helix interposer, its simple structure, enhanced heat exchange effect are obvious.But, install interior
The industrial heat exchange device practical application of slotting thing is little.
The content of the invention
It is not enough for more than, the invention provides a kind of patented product porous hollow sphere with oneself
Shape wire mesh packing and interior hyoid arch ring packing fill in tubular type and change as new turbulent element
(internal diameter of the external diameter less than heat exchanger tube of material interposer is loaded in hot device inner tube), lifted common
Tubular heat exchanger heat exchange efficiency and formed high-effect energy-saving heat-exchanger equipment.
Condensing the experiment of convection current augmentation of heat transfer by single-phase convection augmentation of heat transfer and steam proves spherical
Wire packing and interior hyoid arch ring packing both new turbulent element augmentation of heat transfer effect is significants,
The coefficient of heat transfer can be brought up to three times of blank pipe or so by highest.The porous hollow of spherical wire packing
Body spherical structure, the multidirectional same sex can significantly disturb fluid, also can be shunted by ball surface
Condensed fluid largely avoids liquid film heat transmission resistance caused by wall stream, can greatly improve heat exchange system
Number, while filler can transmit heat by the fine contact with tube wall increases heat exchange area.It is single
Pipe is test result indicate that in the spherical wire packing of laminar flow zone there is notable enhanced heat exchange to act on；It is interior
The special interior tongue structure of tongue shape bow ring packing can not only be significantly increased heat exchange area, and interior
Tongue structure can significantly strengthen flow-disturbing, and shunting condensed fluid reduces wall flow liquid film thickness, each
It is respectively provided with the case of kind and becomes apparent from enhanced heat transfer effect.
Compared with coil interposer, spherical wire packing shows as augmentation of heat transfer more in laminar flow zone
Substantially, interior hyoid arch ring packing augmentation of heat transfer under whole fluid flow state becomes apparent from.It is real
Test and show that the fluid resistance that spherical wire packing brings (can pass through the diameter of eyelet or ball than larger
Adjust or load in mixture regulation optimization), and the fluid resistance of interior hyoid arch ring packing and coil interposer
It is close.Therefore, individually spherical wire packing or interior hyoid arch ring packing or its load in mixture thing
To significantly improve integrated heat transfer coefficient, with application effect more more preferable than interposer such as coils.It is many
The spherical silk screen of hole hollow metal and interior hyoid arch ring packing can be directly placed at respectively in pipe, also may be used
To be connected with an one metal wire；The metal ball shaped and interior hyoid arch ring packing of porous hollow is continuous respectively
String is together, it is also possible to which together, spacing distance scope is 0-5 times of porous hollow gold to interval string
The spherical and interior hyoid arch ring packing external diameter of category；In addition the metal ball shaped and interior hyoid arch of porous hollow is annular
Filler can be fit directly in same body simultaneously, it is also possible to be placed together with metal wire string,
The proportion of the spherical and interior hyoid arch ring packing number of adjacent porous hollow metal is 5: 1-1: 5,
These are equipped with and load in mixture form and are respectively provided with the effect for being obviously improved heat exchange efficiency.
The invention provides shell and tube heat exchanger tube loads new packing is obviously improved heat transfer efficiency
High-performance heat exchanger simple refit method.Develop and demonstrate novel ball wire packing and interior hyoid arch
Ring packing is the high efficiency packing that most reinforcing of potentiality to be exploited heat exchanger is passed, in Optimizing Technical
Lower its convective heat-transfer coefficient and heat exchange amount improve 200% or so, and porous hollow gold than blank pipe
Belong to Ball-type packing and interior hyoid arch ring packing with heat exchange bore than 0.1-1, with 0.50-0.95
It is preferred.According to interpretational criteria (PEC) comprehensive evaluation result of enhanced heat transfer performance, can obtain
Go out when Reynolds number is less than 7000, hyoid arch in internal diameter 20mm is filled in internal diameter 25mm single tubes
The interior hyoid arch ring packing of ring packing and internal diameter 25mm and the spherical wire packings of internal diameter 25mm
The complex heat transfer performance of combination is significantly better than coil interposer.The present invention is for high-performance heat exchanger
Research and development and the lifting of existing pipe heat exchanger heat exchange efficiency have important directive significance and application
Value, meets simple and convenient, economical and efficient application requirement.
Description of the drawings
The spherical wire packing of accompanying drawing 1 (eyelet about 5mm*5mm)
Hyoid arch ring packing (internal diameter 25mm) in accompanying drawing 2
The bushing type single pipe heat exchanger schematic diagram of accompanying drawing 3
1st, inner sleeve outlet；2nd, trocar sheath import；3rd, heat-insulation layer；4th, trocar sheath；5、
Inner sleeve；6th, trocar sheath outlet；7th, inner sleeve import
The Q of accompanying drawing 4aveWith the variation relation of Re
The h of accompanying drawing 5iWith the variation relation of Re
The Q of the filler combination of accompanying drawing 6aveWith the variation relation of Re
The h of the filler combination of accompanying drawing 7iWith the variation relation of Re
The Q of accompanying drawing 8aveWith the variation relation of Re
The h of accompanying drawing 9iWith the variation relation of Re
The each interposer of accompanying drawing 10 compares blank pipe convective heat-transfer coefficient ratio
H under the laminar condition of accompanying drawing 11iWith the variation relation of Re
The Q of accompanying drawing 12aveWith the variation relation of Re
The h of accompanying drawing 13iWith the variation relation of Re
The Q of the interposer of accompanying drawing 14 combinationaveWith the variation relation of Re
The h of the interposer of accompanying drawing 15 combinationiWith the variation relation of Re
The Q of accompanying drawing 16aveWith the variation relation of Re
The h of accompanying drawing 17iWith the variation relation of Re
The each interposer of accompanying drawing 18 compares blank pipe convective heat-transfer coefficient ratio
Each interposer Q/L of accompanying drawing 19mWith the change of quantity of steam
The each interposer of accompanying drawing 20 and the friction factor of blank pipe and the relation of Re
The PEC of accompanying drawing 21 is with Re change curves
Specific implementation step
Following blank pipe, coil interposer, spherical wire packing and interior hyoid arch ring packing enter respectively
The heat transfer experiment of capable vertical and horizontal placement single tube, by the reality under the different Reynolds numbers of measure
Data are tested, can very well compare and prove the optimal augmentation of heat transfer scope and enhanced heat exchange effect of filler.
The spherical wire packing of various geometric and interior hyoid arch ring packing and different inner diameters and different
The serial heat transfer effect of the single tube combination of placement situation compares, and can more preferably understand both new
The geometric parameter of disturbance filler is to heat transfer property and the affecting laws of fluid resistance.
As shown in Figure 1, concrete physical parameter is referring to table 1 for spherical wire packing schematic diagram.Ball
Shape wire packing can strike out hemisphere again by metal gauze, metal lath, expanded metal etc.
It is made by welding or other easy modes.Spherical wire packing is the spheroid of porous hollow,
With high porosity, isotropism, the characteristic for reducing wall stream.In single-phase forced-convection heat transfer,
It can strengthen the turbulence of fluid, the thickness of thinning laminar flow layer fluid, can obvious augmentation of heat transfer；
In steam condensation convection heat transfer' heat-transfer by convection, it can strengthen the disturbance of fluid, the thickness of thinning condensate film
Degree, can obvious augmentation of heat transfer.
The spherical wire packing physical parameter of table 1
The spherical wire packings 1 of Φ 25 represent the hollow ball shape wire packing of internal diameter 25mm, Φ 25
Spherical wire packing 2 represents the interior filling wire packing of internal diameter 25mm.
Interior hyoid arch ring packing as shown in Figure 2, is formed by punching press rectangle sheet metal and is spaced
Ligule lamellar body, ligule lamellar body is concaved, then make rectangle sheet metal coil is circular
The tongue shape ring filler of fin structure is set up in pipe.
Hyoid arch ring packing physical parameter in table 2
Specific embodiment
For effect that is easier and intuitively observing new packing augmentation of heat transfer, Wo Menshe
Bushing type single pipe heat exchanger has been counted, as shown in Figure 3, their concrete geometric parameter such as table 3
It is shown.The first heat exchanger is made by carbon steel, and diameter of inner pipe is larger, places diameter different
Filler, investigate the augmentation of heat transfer situation that heap formula fills filler.Second heat exchanger is by rustless steel
(S30210) it is made, diameter of inner pipe is less, investigates the augmentation of heat transfer feelings that string data fills filler
Condition.
The shell type single pipe heat exchanger geometric parameter of table 3
The available nonlimiting examples hereinafter of the present invention are further described.Following reality
Apply example reflect laminar flow, excess flow, turbulent flow, heat exchanger horizontal positioned, be disposed vertically, it is single-phase
Convection heat transfer' heat-transfer by convection, steam condensation convection heat transfer' heat-transfer by convection, different tube diameters size and different flow size heat exchanging
The affecting laws of effect, can be that manufacturing and designing for high-performance heat exchanger provides technological guidance.
The trocar sheath hot water flow of embodiment 1 is constant in 0.0493kg/s heat transfer effects
Accompanying drawing 4 and accompanying drawing 5 sets forth inner tube diameter 27mm shell type single pipe heat exchanger inner tubes
Logical cold water jacket Gutron hot water (horizontal positioned), hot water inlet temperature 60 C or so, cold water
20 DEG C or so of inlet temperature, constant trocar sheath hot water flow 0.0493kg/s, blank pipe, line
Hyoid arch ring packing average heat transfer speed in circle interposer, the spherical wire packings 2 of Φ 25 and Φ 25
Rate QaveWith convective heat-transfer coefficient hiWith the relation of reynolds number Re.Wherein abscissa reynolds number Re
What is represented is the flow of bushing type single pipe heat exchanger inner tube cold water, and Reynolds number and flow are direct proportions
Relation.
We obtain drawing a conclusion from figure：
(1) average heat transfer speed and convective heat-transfer coefficient are generally with cold water Reynolds number
Rise and rise.The increase of cold water flow, the heat taken away in the unit interval is more, therefore
Average heat transfer speed and convective heat-transfer coefficient can rise；
(2) cold water Reynolds number be less than 4000 when, the spherical wire packings 2 of Φ 25 it is average
Rate of heat transfer and convective heat-transfer coefficient are apparently higher than blank pipe；And work as cold water Reynolds number higher than 4000
When, the average heat transfer speed of the spherical wire packings 2 of Φ 25 compares blank pipe with convective heat-transfer coefficient
Vary less.Therefore, the spherical wire packings 2 of Φ 25 are under laminar flow of fluid and transition stream mode
Can obvious augmentation of heat transfer；
(3) cold water Reynolds number be less than 4000 when, the average heat transfer speed of coil interposer and
Convective heat-transfer coefficient compares that blank pipe change is little, and in Φ 25 hyoid arch ring packing average biography
Hot speed is compared blank pipe and has been declined with convective heat-transfer coefficient；And work as cold water Reynolds number higher than 4000
When, the average heat transfer speed and convection heat transfer' heat-transfer by convection of hyoid arch ring packing in coil interposer and Φ 25
Coefficient is higher than blank pipe.Therefore, in coil interposer and Φ 25 hyoid arch ring packing in fluid
Can obvious augmentation of heat transfer under turbulence state.
The single filler of embodiment 2 and filler combination effect
Accompanying drawing 6 and accompanying drawing 7 sets forth inner tube diameter 27mm shell type single pipe heat exchanger inner tubes
Logical cold water jacket Gutron hot water (horizontal positioned), hot water inlet temperature 60 C or so, cold water
20 DEG C or so of inlet temperature, constant trocar sheath hot water flow 0.0493kg/s, Φ 25 is spherical
In wire packing 1, Φ 20 in hyoid arch ring packing, Φ 20 in hyoid arch ring packing and coil
It is flat that slotting thing combination and the spherical wire packings 2 of Φ 25 are combined with hyoid arch ring packing in Φ 25
Equal rate of heat transfer QaveWith convective heat-transfer coefficient hiWith the relation of reynolds number Re.Wherein abscissa
What reynolds number Re was represented is the flow of shell type single pipe heat exchanger inner tube cold water.
We obtain drawing a conclusion from figure：
(1) under various flow regimes, hyoid arch in hyoid arch ring packing and Φ 20 in Φ 20
The average heat transfer speed and convective heat-transfer coefficient that ring packing is combined with coil interposer is substantially high
In the spherical wire packings 1 of Φ 25 and the spherical wire packings 2 of Φ 25 and hyoid arch annular in Φ 25
Filler combination, it is seen that hyoid arch ring packing has more preferable augmentation of heat transfer effect in Φ 20；
(2) under various flow regimes, hyoid arch ring packing and coil interpolation in Φ 20 are compared
Thing is combined, and the average heat transfer speed and convective heat-transfer coefficient of hyoid arch ring packing is high in Φ 20,
There is more preferable augmentation of heat transfer effect；
(3) the average heat transfer speed of the spherical wire packings 1 of Φ 25 is compared with convective heat-transfer coefficient
The spherical wire packings 2 of Φ 25 are little with hyoid arch ring packing combination and variation in Φ 25.
The trocar sheath hot water flow of embodiment 3 brings up to 0.230kg/s
Accompanying drawing 8 and accompanying drawing 9 sets forth inner tube diameter 27mm shell type single pipe heat exchanger inner tubes
Logical cold water jacket Gutron hot water (horizontal positioned), hot water inlet temperature 60 C or so, cold water
20 DEG C or so of inlet temperature, constant trocar sheath hot water flow 0.230kg/s, blank pipe, coil
Hyoid arch ring packing average heat transfer speed in the spherical wire packing 2 of interposer, Φ 25 and Φ 25
QaveWith convective heat-transfer coefficient hiWith the relation of reynolds number Re.Wherein abscissa reynolds number Re generation
Table be shell type single pipe heat exchanger inner tube cold water flow.
We obtain drawing a conclusion from figure：
(1) average heat transfer speed and convective heat-transfer coefficient are equally as cold water Reynolds number rises
And rise；
(2) under whole fluid flow state, average heat transfer speed is more than 2000 in Reynolds number
Afterwards filler heat transfer coefficient has fluctuation, the change of the heat exchanger average heat transfer speed containing coil interposer
It is more stable；
(3) hot fluid flux is increased to after original five times, under various flow regimes, Φ 25
The spherical wire packing 2 of interior hyoid arch ring packing, Φ 25 is compared blank pipe and is had with coil interposer
More preferable heat-transfer effect, hyoid arch ring packing augmentation of heat transfer effect is best in wherein Φ 25.
The single filler of embodiment 4 and filler combination effect
Accompanying drawing 10 gives Gutron cold water jacket in inner tube diameter 27mm shell type single pipe heat exchangers
Gutron hot water (horizontal positioned), hot water inlet temperature 60 C or so, 20 DEG C of cooling water inlet temperature
Left and right, constant trocar sheath hot water flow 0.0493kg/s, coil interposer, the spherical silks of Φ 25
Tongue in the spherical wire packing 2 of hyoid arch ring packing, Φ 25, Φ 20 in net filler 1, Φ 25
Hyoid arch ring packing is combined with coil interposer and Φ 25 is spherical in bow ring packing, Φ 20
Wire packing 2 combines the convective heat-transfer coefficient h with blank pipe with hyoid arch ring packing in Φ 25iThan
Example.Wherein what abscissa reynolds number Re was represented is the flow of shell type single pipe heat exchanger inner tube cold water,
We obtain drawing a conclusion from figure：
(1) under various flow regimes, filler and interposer can obvious augmentation of heat transfers；
(2) under various flow regimes, hyoid arch ring packing augmentation of heat transfer effect is most in Φ 20
Good, highest augmentation of heat transfer effect is more up to twice；
(3) turbulent element augmentation of heat transfer effect declines afterwards as cold water Reynolds number first rises, when
When cold water Reynolds number is 4000 or so, turbulent element augmentation of heat transfer effect is best.
Embodiment 5
Give in accompanying drawing 11 in inner tube diameter 67mm shell type single pipe heat exchangers outside Gutron hot water
Set Gutron cold water (horizontal positioned), hot fluid flowing is under laminar condition, hot water inlet temperature
60 DEG C or so of degree, 20 DEG C or so of cooling water inlet temperature, constant inner tube hot water flow 0.0570
Kg/s, hyoid arch ring packing, Φ 25 are spherical in random filling Φ 25 in inner tube of heat exchanger
Wire packing 2, the spherical wire packings of Φ 40, the spherical wire packings of Φ 50 and blank pipe are to spreading
The relation of hot coefficient h i and reynolds number Re.What wherein abscissa reynolds number Re was represented is shell type
The flow of single pipe heat exchanger overcoat Gutron cold water, we obtain drawing a conclusion from figure：
(1) under laminar flow of fluid kinestate, convective heat-transfer coefficient is with cold water Reynolds number
Rise and decline；
(2) under laminar flow of fluid kinestate, random filling filler substantially has augmentation of heat transfer
Effect, and as decreased effectiveness is strengthened in the rising of cold water Reynolds number；
(3) hyoid arch ring packing and the spherical wire packing augmentation of heat transfer effects of Φ 40 in Φ 25
Preferably, their convective heat-transfer coefficient is blank pipe more than 2 times.
Embodiment 6
Accompanying drawing 12 and accompanying drawing 13 sets forth in inner tube diameter 27mm shell type single pipe heat exchangers
Gutron cold water jacket Gutron hot water (being disposed vertically), hot water inlet temperature 60 C or so, it is cold
20 DEG C or so of water inlet temperature, constant trocar sheath hot water flow 0.0493kg/s, blank pipe,
Hyoid arch ring packing average heat transfer in the spherical wire packing 2 of coil interposer, Φ 25 and Φ 25
Speed QaveWith convective heat-transfer coefficient hiWith the relation of reynolds number Re.Wherein abscissa Reynolds number
What Re was represented is the flow of shell type single pipe heat exchanger inner tube cold water, and we obtain following from figure
Conclusion：
(1) when cold water Reynolds number is less than 4000, the spherical wire packings 2 of Φ 25 and Φ 25
Interior hyoid arch ring packing average heat transfer speed and convective heat-transfer coefficient are apparently higher than blank pipe；And work as cold
When water Reynolds number is higher than 4000, hyoid arch ring packing in the spherical wire packings 2 of Φ 25 and Φ 25
Average heat transfer speed and convective heat-transfer coefficient are less than blank pipe.Therefore, when heat exchanger is disposed vertically,
Hyoid arch ring packing is in laminar flow of fluid and transition flow shape in the spherical wire packings 2 of Φ 25 and Φ 25
Can obvious augmentation of heat transfer under state；
(2) under various flow regimes, the average heat transfer speed of coil interposer and to spreading
Hot index variation is stablized, but below blank pipe.It can be seen that coil interposer is disposed vertically in heat exchanger
When can not augmentation of heat transfer.
Embodiment 7
Accompanying drawing 13 and accompanying drawing 14 sets forth in inner tube diameter 27mm shell type single pipe heat exchangers
Gutron cold water jacket Gutron hot water (being disposed vertically), hot water inlet temperature 60 C or so, it is cold
20 DEG C or so of water inlet temperature, constant trocar sheath hot water flow 0.0493kg/s, the balls of Φ 25
Hyoid arch ring packing, Φ 20 in hyoid arch ring packing, Φ 25 in shape wire packing 1, Φ 20
Interior hyoid arch ring packing is combined and the spherical wire packings 2 of Φ 25 and Φ 25 with coil interposer
Average heat transfer speed Q of interior hyoid arch ring packing combinationaveWith convective heat-transfer coefficient hiWith Reynolds number
The relation of Re.Wherein what abscissa reynolds number Re was represented is the flow of inner tube of heat exchanger cold water,
We obtain drawing a conclusion：
(1) when cold water Reynolds number is less than 4000, the spherical wire packings 1 of Φ 25, Φ 20
Hyoid arch ring packing and line in hyoid arch ring packing, Φ 20 in interior hyoid arch ring packing, Φ 25
The combination of circle interposer and the spherical wire packings 2 of Φ 25 are combined with hyoid arch ring packing in Φ 25
Average heat transfer speed and convective heat-transfer coefficient with cold water Reynolds number rise and rise；When cold
When water Reynolds number is more than 4000, hyoid arch ring packing in the spherical wire packings 1 of Φ 25, Φ 20,
In Φ 25 in hyoid arch ring packing, Φ 20 hyoid arch ring packing combine with coil interposer and
Average heat transfer speed that the spherical wire packings 2 of Φ 25 are combined with hyoid arch ring packing in Φ 25 and
Convective heat-transfer coefficient slowly declines as cold water Reynolds number rises；
(2) heat transfer property of hyoid arch ring packing is best in Φ 25, better than hyoid arch in Φ 20
Ring packing, and the spherical heat transfer properties of wire packing 1 of Φ 25 are worst.Hyoid arch annular in Φ 20
Filler is combined and the spherical wire packings 2 of Φ 25 and hyoid arch annular in Φ 25 with coil interposer
The heat transfer property of filler combination is in hyoid arch ring packing and the spherical wire packings of Φ 25 in Φ 20
Between 1.
Embodiment 8
Accompanying drawing 16 and accompanying drawing 17 sets forth in inner tube diameter 27mm shell type single pipe heat exchangers
Gutron cold water jacket Gutron hot water (being disposed vertically), hot water inlet temperature 60 C or so, it is cold
20 DEG C or so of water inlet temperature, constant trocar sheath hot water flow 0.230kg/s, blank pipe, line
Hyoid arch ring packing average heat transfer speed in circle interposer, the spherical wire packings 2 of Φ 25 and Φ 25
Rate QaveWith convective heat-transfer coefficient hiWith the relation of reynolds number Re.Wherein abscissa reynolds number Re
What is represented is the flow of shell type single pipe heat exchanger inner tube cold water, and we obtain drawing a conclusion from figure：
Under whole fluid flow state, the average heat transfer speed of filler (interposer) and convection current
Heat transfer coefficient is all low than blank pipe, therefore the spherical wire packing 2 of coil interposer, Φ 25 and Φ 25
Interior hyoid arch ring packing does not have augmentation of heat transfer effect.
Embodiment 9
It is (vertical that accompanying drawing 18 gives Gutron cold water jacket Gutron hot water in shell type single pipe heat exchanger
Place), hot water inlet temperature 60 C or so, 20 DEG C or so of cooling water inlet temperature is constant outer
The spherical wire packing 2 of sleeve pipe hot water flow 0.0493kg/s, coil interposer, Φ 25, Φ 25
Hyoid arch ring packing, Φ in the spherical wire packing 1 of interior hyoid arch ring packing, Φ 25, Φ 20
Hyoid arch ring packing is combined and the spherical wire packings 2 of Φ 25 and Φ with coil interposer in 20
The convective heat-transfer coefficient h of the combination of hyoid arch ring packing and blank pipe in 25iRatio.Wherein abscissa
What reynolds number Re was represented is the flow of shell type single pipe heat exchanger inner tube cold water, and we obtain from figure
To drawing a conclusion：
(1) when cold water Reynolds number is less than 5000, except coil interpolation beyond the region of objective existence, other fillers are (interior
Slotting thing) can obvious augmentation of heat transfer；When cold water Reynolds number is more than 5000, filler is without strong
Change heat-transfer effect；
(2) under whole fluid flow state, the augmentation of heat transfer of hyoid arch ring packing in Φ 25
Preferably, highest augmentation of heat transfer effect is more up to twice for effect；
(3) from the distribution situation of whole scatterplot can be seen that filler-reinforced heat-transfer effect with
Cold water Reynolds number rises and declines, and when fluid is in laminar flow, filler-reinforced heat-transfer effect is best.
Embodiment 10
(a) (b) two width figure gives inner tube diameter 27mm shell type single pipe heat exchangers in accompanying drawing 19
Interior Gutron steam jacket Gutron cold water (being disposed vertically), 100 DEG C or so of inlet steam temperature,
20 DEG C or so of cooling water inlet temperature, constant trocar sheath cold water flow, coil interposer, Φ 25
The heat output and condensation number (Lm) of hyoid arch ring packing and blank pipe in spherical wire packing 2, Φ 25
Than the relation with quantity of steam.We obtain drawing a conclusion from figure：
(1) when quantity of steam is larger, filler does not strengthen steam condensation heat transfer effect；
(2) when quantity of steam it is less for 0.000278kg/s when, condensation water quantity is larger be for
0.0278kg/s, filler has and significantly strengthen steam condensation heat transfer effect, in wherein Φ 25
The heat transfer effect of hyoid arch ring packing is that the twice of blank pipe is more.
Embodiment 11
Accompanying drawing 19 gives Gutron cold water in inner tube diameter 27mm shell type single pipe heat exchangers, cold
20 DEG C or so of water inlet temperature, the spherical wire packings 1 of Φ 25, the spherical wire packings 2 of Φ 25,
Hyoid arch ring packing in hyoid arch ring packing, Φ 20 in hyoid arch ring packing, Φ 25 in Φ 20
Combine with coil interposer, 2 groups of hyoid arch ring packing and the spherical wire packings of Φ 25 in Φ 25
The friction factor and the relation of cooling water Reynolds number of conjunction, coil interposer and blank pipe.Cold water Reynolds
Number is proportional to cold water flow, and we obtain drawing a conclusion from figure：
(1) it can be seen that as the increase friction factor of cold water Reynolds number reduces straight
To steady state value；
(2) friction factor of the inner tube containing filler (interposer) is obviously more than blank pipe, says
Filling turbulent element can dramatically increase fluid resistance in bright pipe；
(3) it is hyoid arch ring in Φ 20 that these turbulent elements cause fluid resistance to sort from big to small
Shape filler is combined with coil interposer, the spherical wire packings 1 of Φ 25, the spherical silk screens of Φ 25 are filled out
Material 2, hyoid arch ring in hyoid arch ring packing, Φ 25 in hyoid arch ring packing, Φ 20 in Φ 25
Shape filler is combined with the spherical wire packings 2 of Φ 25, coil interposer.
Embodiment 12
Accompanying drawing 21 gives the shell type single pipe heat exchanger of diameter of inner pipe 25mm, interior Gutron cold water,
Overcoat Gutron hot water, constant hot water flow 0.0493kg/s, 20 DEG C or so of cooling water inlet temperature,
Hot water inlet temperature 60 C or so, the spherical wire packings 1 of Φ 25, the spherical wire packings of Φ 25
2nd, hyoid arch is annular in hyoid arch ring packing, Φ 20 in hyoid arch ring packing, Φ 25 in Φ 20
Filler is combined with coil interposer, hyoid arch ring packing and the spherical wire packings of Φ 25 in Φ 25
2 combinations, the interpretational criteria (PEC) of the enhanced heat transfer performance of coil interposer and cooling submarine mine
The relation of promise number.Cold water Reynolds number is proportional to cold water flow, and we obtain drawing a conclusion from figure：
(1) it can be seen that when cold water Reynolds number is larger, PEC values are relatively
Height, the augmentation of heat transfer combination property of interposer is preferable；
(2) only have coil interposer in the PEC that cold water Reynolds number is 10000 or so more than 1,
Show as good enhanced heat transfer component.In other cases, the PEC of filler (interposer)
Respectively less than 1；
(3) cold water Reynolds number be less than 7000 when, in Φ 20 hyoid arch ring packing 1 and
The PEC values that hyoid arch ring packing is combined with the spherical wire packings 2 of Φ 25 in Φ 25 are more than coil
Interposer, its multiple strengthening heat transfer property is excellent compared with coil interposer.
Claims (3)
1. a kind of shell-and-tube heat exchanger of new built-in filler, composition includes housing and is arranged on
Heat exchanger tube in housing, it is characterised in that：Porous hollow or built-in is loaded in described heat exchanger tube
The metal ball shaped filler of filler or interior hyoid arch ring packing, the outside dimension of these filler interposer
Less than the internal diameter size of heat exchanger tube.
2. the new pipe with the built-in filler of higher heat exchange efficiency according to claim 1
Shell heat exchanger, it is characterised in that：The metal ball shaped silk screen of described porous hollow and interior hyoid arch ring
Shape filler can be placed directly respectively, it is also possible to be connected with an one metal wire；Porous hollow metal ball
Shape is together with interior hyoid arch ring packing respectively continuous string, it is also possible to which interval is gone here and there together, interval
Distance range is the metal ball shaped and interior hyoid arch ring packing external diameter of 0-5 times of porous hollow；It is many in addition
Hollow metal spherical and interior hyoid arch ring packing in hole can be fit directly in same body simultaneously,
Can also together be placed with metal wire string, the spherical and interior hyoid arch annular of adjacent porous hollow metal
The proportion of filler number is 5: 1-1: 5.
3. the new shell-and-tube with higher heat exchange efficiency according to claim 1 and 2
Heat exchanger, it is characterised in that：The metal ball shaped filler of described porous hollow and interior hyoid arch annular are filled out
Material, than 0.1-1, is preferred with heat exchange bore with 0.50-0.95.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111359351A (en) * | 2020-03-13 | 2020-07-03 | 重庆德沃木制品加工有限公司 | Manufacturing process of boiler dust collection device |
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| SU1486735A1 (en) * | 1987-07-13 | 1989-06-15 | Sergej G Kochemasov | Heat exchange tube |
| CN2079729U (en) * | 1990-08-01 | 1991-06-26 | 朱永全 | Network ball type static mixer |
| CN101084409A (en) * | 2004-10-07 | 2007-12-05 | 布鲁克斯自动化有限公司 | Efficient heat exchanger for refrigeration process |
| CN201387255Y (en) * | 2009-04-06 | 2010-01-20 | 周麟 | Internal turbulent type heat exchanger |
| CN201463376U (en) * | 2009-02-24 | 2010-05-12 | 潘戈 | Solar heat collecting tube |
| CN104236377A (en) * | 2014-05-15 | 2014-12-24 | 重庆天瑞化工设备股份有限公司 | Automatic fluid blender |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1486735A1 (en) * | 1987-07-13 | 1989-06-15 | Sergej G Kochemasov | Heat exchange tube |
| CN2079729U (en) * | 1990-08-01 | 1991-06-26 | 朱永全 | Network ball type static mixer |
| CN101084409A (en) * | 2004-10-07 | 2007-12-05 | 布鲁克斯自动化有限公司 | Efficient heat exchanger for refrigeration process |
| CN201463376U (en) * | 2009-02-24 | 2010-05-12 | 潘戈 | Solar heat collecting tube |
| CN201387255Y (en) * | 2009-04-06 | 2010-01-20 | 周麟 | Internal turbulent type heat exchanger |
| CN104236377A (en) * | 2014-05-15 | 2014-12-24 | 重庆天瑞化工设备股份有限公司 | Automatic fluid blender |
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| CN111359351A (en) * | 2020-03-13 | 2020-07-03 | 重庆德沃木制品加工有限公司 | Manufacturing process of boiler dust collection device |
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| CN106595378B (en) | 2020-01-10 |
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