CN106091410A - A kind of solar heat-preservation water tank - Google Patents

A kind of solar heat-preservation water tank Download PDF

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Publication number
CN106091410A
CN106091410A CN201610461799.3A CN201610461799A CN106091410A CN 106091410 A CN106091410 A CN 106091410A CN 201610461799 A CN201610461799 A CN 201610461799A CN 106091410 A CN106091410 A CN 106091410A
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China
Prior art keywords
tube
hot water
sloping
isosceles triangle
fin
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Granted
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CN201610461799.3A
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Chinese (zh)
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CN106091410B (en
Inventor
赵炜
王艳艳
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QINGDAO VOCATIONAL AND TECHNICAL COLLEGE OF HOTEL MANAGEMENT
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赵炜
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Priority to CN201610461799.3A priority Critical patent/CN106091410B/en
Priority to CN201510723274.8A priority patent/CN105202779B/en
Publication of CN106091410A publication Critical patent/CN106091410A/en
Application granted granted Critical
Publication of CN106091410B publication Critical patent/CN106091410B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S60/00Arrangements for storing heat collected by solar heat collectors
    • F24S60/30Arrangements for storing heat collected by solar heat collectors storing heat in liquids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/30Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/70Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • F24S10/75Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28DHEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0008Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0025Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
    • F28D7/0033Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes the conduits for one medium or the conduits for both media being bent
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/02Tubular elements of cross-section which is non-circular
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • F28F1/124Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and being formed of pins
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/40Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only inside the tubular element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F13/00Arrangements for modifying heat-transfer, e.g. increasing, decreasing
    • F28F13/06Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media
    • F28F13/08Arrangements for modifying heat-transfer, e.g. increasing, decreasing by affecting the pattern of flow of the heat-exchange media by varying the cross-section of the flow channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00Solar heat collectors using working fluids
    • F24S10/70Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • F24S10/75Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits with enlarged surfaces, e.g. with protrusions or corrugations
    • F24S2010/751Special fins
    • F24S2010/752Special fins extending obliquely
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24SSOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S2080/03Arrangements for heat transfer optimization
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00Fins
    • F28F2215/10Secondary fins, e.g. projections or recesses on main fins
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

Abstract

The invention provides a kind of solar heat-preservation water tank, including heat collector, hot water storage tank and radiating tube, radiating tube is arranged in hot water storage tank, and the hot water of described heat collector heating, through radiating tube, transfers heat to hot water storage tank by radiating tube;Described radiating tube is plate-fin radiating tube, described plate-fin radiating tube includes flat tube and the fin being arranged in flat tube, described fin includes the sloping portion favouring tube wall, by the prominent point of impact style processing on sloping portion, described prominent point is isosceles triangle, the base of described isosceles triangle is arranged on sloping portion, the a length of h in base of described isosceles triangle is along the flow direction of hot water, same sloping portion arranges multiple prominent point, in the case of drift angle holding is constant, along the flow direction of hot water, described h is increasing.The present invention is become larger by h's, it is possible to achieve higher heat exchange efficiency, saves the energy further.

Description

A kind of solar heat-preservation water tank
Technical field
The invention belongs to field of solar energy, particularly relate to the solar energy system of a kind of accumulation of heat.
Background technology
Along with the high speed development of modern social economy, the mankind are increasing to the demand of the energy.But coal, oil, sky So the traditional energy storage level such as gas constantly reduce, the most in short supply, cause rising steadily of price, conventional fossil fuel causes simultaneously Problem of environmental pollution the most serious, these development that the most significantly limit society and the raising of human life quality.The energy Problem has become as one of distinct issues of contemporary world.Thus seek the new energy, the most free of contamination cleaning energy Source has become the focus of present people research.
Solar energy is a kind of inexhaustible clean energy resource, and stock number is huge, and earth surface is received every year Solar radiant energy total amount be 1 × 1018KW h, for more than 10,000 times of world's year consumption gross energy.Countries in the world are the most too The utilization of sun energy is as important one of new energy development, and the Chinese government the most clearly proposes to amass at Report on the Work of the Government Pole development new forms of energy, wherein the utilization of solar energy is especially in occupation of prominent position.Arrive tellurian yet with solar radiation Energy density little (about one kilowatt every square metre), and be again discontinuous, this brings certain being stranded to large-scale exploitation Difficult.Therefore, in order to extensively utilize solar energy, not only to solve technical problem, and must be able to economically with conventional energy Source is competed mutually.
Generally, the water of heat collector heating needs to pass to other fluids by the way of heat exchange, or carries out Storage.But the water circulation system of solar thermal collection system is a system closed, recirculated water circulating-heating, but in circulation Water cycle process can produce some on-condensible gases, additionally, in the case of sometimes sunray is strong, the water meeting in heat collector Form soda pop hot water, in the case of therefore the water in heating carries out heat exchange, because there is on-condensible gas or because forming soda pop Hot water, thus cause the reduction of the coefficient of heat transfer so that solar energy cannot make full use of.
For the problems referred to above, the invention provides a kind of new solar heat-preservation system, thus solve solar water with Its fluid carries out the problem that the coefficient of heat transfer in the case of heat exchange is low.
Summary of the invention
The invention provides a kind of new solar energy system, thus solve the technical problem above occurred.
To achieve these goals, technical scheme is as follows:
A kind of solar energy system, including heat collector, hot water storage tank and radiating tube, radiating tube is arranged in hot water storage tank, described collection The hot water of hot device heating, through radiating tube, transfers heat to hot water storage tank by radiating tube;It is characterized in that, described heat radiation Pipe is multiple radiating tubes of series connection.
As preferably, described radiating tube is plate-fin radiating tube, and described plate-fin radiating tube includes flat tube and is arranged on flat Fin in pipe, described flat tube includes that tube wall parallel to each other, described fin are arranged between tube wall, and described fin includes tilting In the sloping portion of tube wall, by the prominent point of impact style processing on sloping portion, so that the fluid of sloping portion both sides leads to Cross the hole connection that on sloping portion, impact style is formed;Described prominent point stretches out along hot water flow direction from sloping portion.
As preferably, described prominent point is isosceles triangle, and the base of described isosceles triangle is arranged on sloping portion, no The average length L of the same prominent point in plate wing radiating tube is different, and L is the summit distance to midpoint, base of isosceles triangle.
As preferably, along the flow direction of hot water, L constantly increases.
As preferably, along the flow direction of hot water, the amplitude that L increases is increasing.
As preferably, described fin includes horizontal component, described horizontal component and tube walls parallel and is attached to one with tube wall Rising, described sloping portion is connected with horizontal component;Described prominent point is isosceles triangle, and the base of described isosceles triangle is arranged on On sloping portion, the distance of adjacent tube wall is H, a length of h on isosceles triangle base, and the distance of adjacent sloping portion is W, the drift angle of isosceles triangle is b, and the angle of the bearing of trend of described prominent point and the flow direction of hot water is a, sloping portion with The angle of the acute angle between tube wall is c, meets equation below:
C6*h/H=c1*Ln (L*sin (a)/(w*sin (c))+c2,
sin(b/2)=c3+c4*sin(a)-c5*(sin(a))2,
Wherein Ln is logarithmic function, and c1, c2, c3, c4, c5 are coefficients,
0.24 < c1 < 0.25,0.68 < c2 < 0.70,0.87 < c3 < 0.88,0.68 < c4 < 0.70,1.14 < c5 < 1.15,
7.0<c6<7.5;
19 ° < a < 71 °, 55 ° <b < 165 °, 90 ° < c < 70 °;
10mm < w < 15mm, 6mm < H < 14mm;
0.19<L*sin(a)/w<0.41, 0.29<7*h/H<0.47;
H be with the relative face of adjacent tube wall between distance, W is along tube wall direction with the relative face of adjacent sloping portion On distance, L is the summit distance to midpoint, base of isosceles triangle.
As preferably, c1=0.245, c2=0.694,
C3=0.873, c4=0.691, c5=1.1454, c6=7.11.
As preferably, the bearing of trend of described prominent point is a with the angle of the flow direction of hot water, and same rake sets up separately Putting multiple prominent point, along the flow direction of hot water, described angle a is increasing.
As preferably, same sloping portion arranges multiple prominent point, and multiple prominent points are staggered from sloping portion two epitaxial lateral overgrowth Stretch.
As preferably, a length of L that described prominent point extends, same sloping portion arranges multiple prominent point, along hot water Flow direction, described length L is more and more less.
As preferably, described prominent point is isosceles triangle, and the base of described isosceles triangle is arranged on sloping portion, makees For preferably, base is identical with the angle of inclination of sloping portion, and the drift angle of described isosceles triangle is b, and same rake sets up separately Putting multiple prominent point, along the flow direction of hot water, described drift angle b is increasing.
As preferably, described prominent point is isosceles triangle, and the base of described isosceles triangle is arranged on sloping portion, makees For preferably, base is identical with the angle of inclination of sloping portion, and the base of described isosceles triangle is S1, and same rake sets up separately Putting multiple prominent point, along the flow direction of hot water, described S1 is more and more less.
Compared with prior art, plate type heat exchanger and the heat exchange tube wall thereof of the present invention has the advantage that
1) the described radiating tube of the present invention is the multiple of parallel connection, by arranging the radiating tube of multiple parallel connection, can increase heat exchange Area, strengthens the heat storage capacity of solar energy system.
2) the plate wing fin of the prominent point of punching press is applied to solar heat-preservation system by the present invention, solves containing fixed gas The problem that the heat exchange efficiency of body is low, has greatly saved the energy, has overcome the problem that solar heat-exchange system effectiveness is low, it will be apparent that Improve heat exchange efficiency.
3) laminar sublayer can on the one hand be destroyed, on the other hand compared with " punching " fin, not because of punching loss heat-transfer surface Long-pending, and " sharp " and " hole " can disturbance fluid on differing heights respectively, strengthen different thermal resistance links;
4) aperture that punching press " prominent point " is formed, by the impact of " prominent point " downstream pressure field, can realize the pressure of fin media of both sides Power and mass exchange, damage the stability of viscous sublayer and liquid film, enhanced heat exchange;
5) for the hot water containing on-condensible gas, it is possible to realize expanding gas-liquid interface and gas phase boundary with cold by " prominent point " But the contact area of wall strengthen disturbance;
6) by substantial amounts of experiment, it is determined that the physical dimension of optimal plate-fin radiating tube;
7) distance by the adjacent tube wall of design is H, a length of h on isosceles triangle base, adjacent sloping portion away from From for w, the drift angle of isosceles triangle is b, and the bearing of trend of described prominent point is the parameters such as a with the angle of the flow direction of hot water Along the change of fluid flow direction, improve heat exchange efficiency or reduce fluid pressure.
Accompanying drawing explanation
Fig. 1 is the structural representation of solar heat-preservation system of the present invention;
Fig. 2 is the improved structure schematic diagram of solar heat-preservation system of the present invention;
Fig. 3 is the improved structure schematic diagram of solar heat-preservation system of the present invention;
Fig. 4 is one cross section structural representation of plate-fin radiating tube of the present invention;
Fig. 5 is the schematic diagram that the present invention arranges prominent point structures slope part planar;
Fig. 6 is another schematic diagram that the present invention arranges prominent point structures slope part planar;
Fig. 7 is the triangle prominent point structural representation of the present invention;
Fig. 8 is the tangent plane structural representation in triangle of the present invention prominent point runner;
The structural representation that the prominent point of Fig. 9 present invention extends to sloping portion both sides;
Figure 10 is one cross section structural representation of plate-fin radiating tube of the present invention.
Reference is as follows:
1 plate wing fin, 2 fluid passages, 3 tube walls, 4 sloping portions, 5 horizontal components, 6 prominent points, 7 fins, 8 heat collectors, 9 circulations Pump, 10 hot water storage tanks, 11 seal members.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described in detail.
Herein, without specified otherwise, relating to formula, "/" represents that division, "×", " * " represent multiplication.
As it is shown in figure 1, a kind of solar heat-preservation system, including heat collector 8, hot water storage tank 10 and radiating tube 1, radiating tube 1 Being arranged in hot water storage tank 10, the hot water of described heat collector 8 heating, through radiating tube 1, transfers heat to store by radiating tube 1 Water in boiler 10, the hot water circuit after heat exchange returns to heat in heat collector 8.Preferably it is recycled to collection by circulating pump 9 In hot device 8.
Fig. 2 illustrates the embodiment of the improvement of Fig. 1.As in figure 2 it is shown, described radiating tube is the multiple of parallel connection.By setting Put the radiating tube of multiple parallel connection, heat exchange area can be increased.
Fig. 3 illustrates the embodiment of the improvement of Fig. 1.As it is shown on figure 3, described radiating tube is the multiple of series connection.By setting Put the radiating tube of multiple series connection, heat exchange area can be increased.
As shown in Figure 4, described radiating tube is plate-fin radiating tube, and described radiating tube includes flat tube and is arranged on flat tube In fin 7, described flat tube includes tube wall 3 parallel to each other, between described adjacent tube wall 3 formed fluid passage 2, described Between adjacent tube wall 3, fin 7 is set.Described fin 7 includes the sloping portion 4 tilted with tube wall 3, and described sloping portion is mutual Parallel.By the prominent point 6 of impact style processing on sloping portion 4, so that the fluid of sloping portion 4 both sides passes through sloping portion The hole formed by impact style on 4 is connected;Described prominent sharp 6 stretch out from sloping portion 4.
Described flat tube can be that integration manufactures, as shown in Figure 10, it is also possible to is by upper and lower tube wall and to be arranged on Seal member split composition between tube wall up and down, described seal member 11 is arranged on the left and right sides of Fig. 4.
Because sloping portion 4 is parallel to each other, between the most adjacent sloping portion 4 with tube wall up and down, constitute parallel four limits Shape passage.
By arranging prominent point 6, have the advantage that
1) on the one hand can destroy laminar sublayer, not lose heat exchange area, and " sharp " and " hole " can be respectively different high Disturbance fluid on degree, enhanced heat exchange;
2) punching press is dashed forward the aperture of pointed one-tenth, by the impact of prominent point downstream pressure field, can realize fin media of both sides pressure and Mass exchange, damages the stability of viscous sublayer and liquid film, enhanced heat exchange.
3) for the hot water containing on-condensible gas or biphase hot water, it is possible to by " prominent point " realize expanding gas-liquid interface with And the contact area of gas phase boundary and cooling wall strengthen disturbance.
Above-mentioned measure is taked, it is possible to greatly improve the heat exchange efficiency of hot water in plate-fin radiating tube.With normally Hot water heat exchange is compared, it is possible to increase the heat exchange efficiency of 15-25%.
As preferably, the angle that the flow direction of described prominent sharp 6 and hot water is formed is acute angle.
As preferably, as shown in Figure 4, described fin 7 is apsacline fin, and described fin 7 includes horizontal component 5 and inclines Tiltedly part 4, described horizontal component 5 is parallel with tube wall 3 and sticks together with tube wall 3, described sloping portion 4 and horizontal component 5 Connect.
In Fig. 5, the flow direction of hot water is from left to right.But the simply explanation hot water of left and right herein is along the flowing of prominent point Direction, is not offered as actual certain left and right flowing.
As shown in Figure 8, the described prominent bearing of trend of sharp 6 is a with the angle of the flow direction of hot water, as it is shown in figure 5, along The flow direction of hot water, same sloping portion 4 arranges multiple prominent sharp 6, and along the flow direction of hot water, described angle a is more Come the biggest.
Be found through experiments, by becoming larger of angle a, identical with angle a compared with, it is possible to achieve higher change The thermal efficiency, it is possible to about improve the heat exchange efficiency of about 10%.
As preferably, the described prominent sharp 6 a length of L extended, along the flow direction of hot water, same sloping portion 4 sets Putting multiple prominent sharp 6, along the flow direction of hot water, described length L is increasing.Be found through experiments, by length L by Gradual change is big, identical with length L compared with, it is possible to achieve higher heat exchange efficiency, it is possible to about improve the heat exchange effect of about 9% Rate.
As preferably, along the flow direction of hot water, the amplitude that length L becomes big is more and more less.It is found through experiments, length The amplitude that the change of L is big is more and more less, it is ensured that in the case of heat exchange efficiency, reduce flow resistance further, it is possible to about drop The flow resistance of low about 5%.
As preferably, described prominent sharp 6 is isosceles triangle, and the base of described isosceles triangle is arranged on sloping portion 4, As preferably, base is identical with the angle of inclination of sloping portion, and the drift angle of described isosceles triangle is b, along the flowing of hot water Direction, same sloping portion 4 arranges multiple prominent sharp 6, along the flow direction of hot water, keeps constant situation in base length Under, described prominent pinnacle angle b is more and more less.It is found through experiments, by tapering into of prominent pinnacle angle b, phase complete with drift angle b Compared with, it is possible to achieve higher heat exchange efficiency, it is possible to about improve the heat exchange efficiency of about 8%.
As preferably, along the flow direction of hot water, the amplitude that drift angle b diminishes is more and more less.It is found through experiments, drift angle The amplitude that b diminishes is more and more less, it is ensured that in the case of heat exchange efficiency, reduces flow resistance further, it is possible to about reduce The flow resistance of about 4%.
As preferably, described prominent sharp 6 is isosceles triangle, and the base of described isosceles triangle is arranged on sloping portion, As preferably, base is identical with the angle of inclination of sloping portion, and a length of h in base of described isosceles triangle, along hot water Flow direction, same sloping portion 4 arranges multiple prominent sharp 6, and along the flow direction of hot water, same sloping portion 4 is arranged Multiple prominent points, in the case of drift angle holding is constant, along the flow direction of hot water, described h is increasing.Sent out by experiment Existing, becoming larger by h, identical with h compared with, it is possible to achieve higher heat exchange efficiency, it is possible to about improve about 7% Heat exchange efficiency.
As preferably, along the flow direction of hot water, the amplitude that h becomes big is more and more less.Being found through experiments, h becomes big Amplitude is more and more less, it is ensured that in the case of heat exchange efficiency, reduces flow resistance further, it is possible to about reduce about 5% Flow resistance.
As preferably, along the flow direction of fluid, same sloping portion arranges multiple rows of prominent sharp 6, as it can be seen in figures 5 and 6, often Distance between the prominent point of row is S2, and along the flow direction of hot water, described S2 is increasing.Why it is arranged such, mainly Purpose is big by the change of S2, it is achieved in the case of ensureing heat exchange efficiency, reduce flow resistance further.Sent out by experiment Existing, flow resistance reduces about 10%.
Described S2 is that the base of the prominent point with adjacent row is as computed range.
As preferably, as shown in Figure 6, multiple rows of prominent sharp 6 is shifted structure.In Fig. 6, hot water is to flow from top to bottom.But herein Up and down simply explanation hot water along the flow direction of prominent point, be not offered as reality and flow the most up and down.
Finding in an experiment, the distance of adjacent tube wall 3 can not be excessive, crosses conference and causes the reduction of heat exchange efficiency, too small meeting Cause flow resistance excessive, in like manner, for the base length of isosceles triangle, drift angle, prominent point, fin sloping portion distance with The angle of fluid flow direction all can not be excessive or too small, the excessive or too small reduction that all can cause heat exchange efficiency or flowing The change of resistance is big, therefore at the distance of adjacent tube wall 3, the base length of isosceles triangle, drift angle, prominent point, fin sloping portion And meet an optimized size relationship between the angle of fluid flow direction.
Therefore, the present invention is thousands of the numerical simulations by multiple various sizes of heat exchangers and test data, Meet in the case of industrial requirements pressure-bearing (below 10MPa), in the case of realizing maximum heat exchange amount, the optimal heat exchange summed up The dimensionally-optimised relation of tube wall.
The distance of adjacent tube wall is H, a length of h on isosceles triangle base, and the distance of adjacent sloping portion is w, The angle of the acute angle between sloping portion and tube wall is c, meets equation below:
C6*h/H=c1*Ln (L*sin (a)/(w*sin (c))+c2,
sin(b/2)=c3+c4*sin(a)-c5*(sin(a))2,
Wherein Ln is logarithmic function, and c1, c2, c3, c4, c5 are coefficients,
0.24 < c1 < 0.25,0.68 < c2 < 0.70,0.87 < c3 < 0.88,0.68 < c4 < 0.70,1.14 < c5 < 1.15,
7.0<c6<7.5;
19 ° < a < 71 °, 55 ° <b < 165 °, 90 ° < c < 70 °;
10mm < w < 15mm, 6mm < H < 14mm;
0.19<L*sin(a)/w<0.41, 0.29<7*h/H<0.47;
H be with the relative face of adjacent tube wall between distance, W is along tube wall direction with the relative face of adjacent sloping portion On distance, L is the summit distance to midpoint, base of isosceles triangle.
As preferably, c1=0.245, c2=0.694,
C3=0.873, c4=0.691, c5=1.1454, c6=7.11.
As preferably, 85 ° < c < 80 °.
As preferably, along with the increase of angle c, c6 is more and more less.
By the optimal geometric scale of " the prominent point " that go out of above-mentioned formula, heat exchange efficiency can be improved, simultaneously can be real The most only to viscous sublayer or comprise liquid film and to the strengthening comprising gas phase boundary different scale internal thermal resistance, it is to avoid measure Degree, causes unnecessary drag losses.
As preferably, the base of the adjacent prominent point of described same row the most on one wire, the prominent point that same row is adjacent Distance is S1, described 3.5 × h < S1 < 5 × h, wherein S1 be the base with the prominent point of adjacent two isosceles triangles midpoint away from From.
As preferably, the base of the isosceles triangle of the prominent point of adjacent row is parallel to each other, and the summit of isosceles triangle is on earth The distance at midpoint, limit is L, and distance S2 of adjacent row is 4.2*L < S2 < 7.2*L.It is preferably S2=5.3*L
During the base difference of the isosceles triangle of adjacent row, the weighted mean on two bases are taked to calculate.
As preferably, the angle of the isosceles triangle of same row is identical with base.I.e. shape is identical, for equal Shape.
For formula above, for the prominent point that front and rear row size is different, the most still it is suitable for.
For the concrete dimensional parameters do not mentioned, it is designed according to normal heat exchanger.
As preferably, as it is shown in figure 9, arrange multiple prominent sharp 6 on sloping portion, described prominent point is to the not homonymy of sloping portion Extend
As preferably, same sloping portion arranges multiple rows of prominent point, and the prominent point of at least one row point prominent with other rows is to sloping portion Extend side different.
As preferably, the adjacent prominent point of often row extends to the not homonymy of sloping portion.
By being arranged such, so that fluid replaces heat exchanging tampering in the passage of sloping portion both sides, carry further High heat exchange efficiency.Compared with in the same side, it is possible to increase about 8%.
As preferably, cascaded structure as shown in Figure 3, the average length L of the different prominent points in plate wing radiating tube 1 is not With.Along the flow direction of hot water, average length L constantly increases.Experiment finds, by being arranged such, can improve about The heat exchange efficiency of 10%.
Average length L is the weighted mean of all prominent point length.
Along the flow direction of hot water, the amplitude that average length L increases is increasing.Experiment finds, by being arranged such, The heat exchange efficiency of about 12% can be improved.
As preferably, the highest length L is 1.2-1.3 times of minimum length L.
As preferably, outside described radiating tube, fin is set.
As preferably, along the flow direction of hot water, outside fin height constantly increases, and the amplitude that height increases more is come The biggest.By increasing fin height, thus increase the heat exchange area of fin.Experiment finds, by being arranged such, with fin height Identical compare, the heat exchange efficiency of about 5% can be improved.
Although the present invention discloses as above with preferred embodiment, but the present invention is not limited to this.Any art technology Personnel, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should When being as the criterion with claim limited range.

Claims (5)

1. a solar heat-preservation water tank, including radiating tube, described radiating tube is arranged in hot water storage tank, and solar thermal collector adds The hot water of heat, through radiating tube, transfers heat to hot water storage tank by radiating tube.
2. hot water storage tank as claimed in claim 1, it is characterised in that described radiating tube is plate-fin radiating tube, described plate wing Formula radiating tube includes flat tube and the fin being arranged in flat tube, and described flat tube includes tube wall parallel to each other, and described fin is arranged Between tube wall, described fin includes the sloping portion favouring tube wall, by the prominent point of impact style processing on sloping portion, So that the hole that the fluid of sloping portion both sides is formed by impact style on sloping portion connects;Described prominent point is from sloping portion Stretch out along hot water flow direction;Described prominent point is isosceles triangle, and the base of described isosceles triangle is arranged on inclination In part, a length of h in base of described isosceles triangle is along the flow direction of hot water, and same sloping portion arranges multiple prominent Point, in the case of drift angle holding is constant, along the flow direction of hot water, described h is increasing.
3. hot water storage tank as claimed in claim 2, it is characterised in that along the flow direction of hot water, h becomes big amplitude more to be come The least.
4. hot water storage tank as claimed in claim 2, it is characterised in that described fin includes horizontal component, described horizontal component Sticking together with tube walls parallel and with tube wall, described sloping portion is connected with horizontal component;Described prominent point is isosceles triangle, The base of described isosceles triangle is arranged on sloping portion, and the distance of adjacent tube wall is H, the length on isosceles triangle base For h, the distance of adjacent sloping portion is w, and the drift angle of isosceles triangle is b, the bearing of trend of described prominent point and the stream of hot water The angle in dynamic direction is a, and the angle of the acute angle between sloping portion and tube wall is c, meets equation below:
C6*h/H=c1*Ln (L*sin (a)/(w*sin (c))+c2,
sin(b/2)=c3+c4*sin(a)-c5*(sin(a))2,
Wherein Ln is logarithmic function, and c1, c2, c3, c4, c5 are coefficients,
0.24 < c1 < 0.25,0.68 < c2 < 0.70,0.87 < c3 < 0.88,0.68 < c4 < 0.70,1.14 < c5 < 1.15,
7.0<c6<7.5;
19 ° < a < 71 °, 55 ° <b < 165 °, 90 ° < c < 70 °;
10mm < w < 15mm, 6mm < H < 14mm;
0.19<L*sin(a)/w<0.41, 0.29<7*h/H<0.47;
H be with the relative face of adjacent tube wall between distance, W is along tube wall direction with the relative face of adjacent sloping portion On distance, L is the summit distance to midpoint, base of isosceles triangle.
5. a solar water heater, including the hot water storage tank of one of claim 1-4.
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CN201610461813.XA Active CN106123373B (en) 2015-10-29 2015-10-29 The hot water storage tank that a kind of fin extends to different directions
CN201610462074.6A Active CN106091432B (en) 2015-10-29 2015-10-29 A kind of solar energy system of inner fin of heat dissipation pipe apex angle variation
CN201610461814.4A Active CN106091435B (en) 2015-10-29 2015-10-29 A kind of hot water storage tank of spacing of fin variation
CN201610461799.3A Active CN106091410B (en) 2015-10-29 2015-10-29 A kind of solar heat-preservation water tank
CN201610275903.XA Expired - Fee Related CN105928226B (en) 2015-10-29 2015-10-29 A kind of solar heat-preservation system
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CN201610461813.XA Active CN106123373B (en) 2015-10-29 2015-10-29 The hot water storage tank that a kind of fin extends to different directions
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CN110430720B (en) * 2019-07-09 2020-11-06 北京空间飞行器总体设计部 Gravity heat pipe radiator suitable for outdoor base station

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CN204460146U (en) * 2015-01-20 2015-07-08 李泽明 A kind of solar heat-preservation steam raising plant

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