CN105910299B - A kind of solar energy collector system of thermal-collecting tube lower wall surface height of projection change - Google Patents
A kind of solar energy collector system of thermal-collecting tube lower wall surface height of projection change Download PDFInfo
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- CN105910299B CN105910299B CN201610246094.XA CN201610246094A CN105910299B CN 105910299 B CN105910299 B CN 105910299B CN 201610246094 A CN201610246094 A CN 201610246094A CN 105910299 B CN105910299 B CN 105910299B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a kind of solar energy collector system, including thermal-collecting tube, speculum and collecting plate, connected between adjacent two thermal-collecting tubes by collecting plate, so that forming tube plate structure between multiple thermal-collecting tubes and adjacent collecting plate；The tube plate structure parabolically shape structure or arc-shaped structure, the bending direction of the parabola or circular arc and the parabolic structure of speculum on the contrary, the focus of tube plate structure and the focus of speculum on a point；The projection of augmentation of heat transfer is provided on the thermal-collecting tube lower wall surface relative with speculum, to strengthen the absorption to solar energy, is extended along thermal-collecting tube middle part to both sides, the height of projection of the lower wall surface of thermal-collecting tube is more and more lower.The present invention can avoid the material of the thermal-collecting tube of centre from being easily damaged at high temperature, and the temperature of whole thermal-collecting tube can be kept uniform, increased the service life.
Description
Technical field
The invention belongs to field of solar energy, more particularly to a kind of solar energy collector system.
Background technology
With the rapid development of modern social economy, the mankind are increasing to the demand of the energy.But coal, oil, day
The traditional energy storage levels such as right gas constantly reduce, are increasingly in short supply, cause rising steadily for price, while conventional fossil fuel causes
Problem of environmental pollution it is also further serious, these all limit the development of society and the raising of human life quality significantly.The energy
Problem has become most one of distinct issues of contemporary world.Thus seek the new energy, particularly free of contamination cleaning energy
Source has turned into 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 × 1018KWh, more than 10,000 times that gross energy is consumed for world's year.Countries in the world are all too
It is positive can by the use of as important one of new energy development, the Chinese government exists《The government work report》Also clearly propose to accumulate already
New energy is developed in pole, and wherein the utilization of solar energy is especially in occupation of prominent position.Reached yet with solar radiation tellurian
Energy density is small（About one kilowatt every square metre）, and be discontinuous again, this brings certain tired to large-scale utilization
It is difficult.Therefore, in order to utilize solar energy extensively, not only to solve technical problem, and economically must be able to conventional energy
Source mutually competes.
The solar energy that solar thermal collector absorbs is now in some cases there may be surplus, and now this part solar energy can
It is able to can lose, it is therefore desirable to which a kind of heat to surplus makes full use of.
No matter the solar thermal collector of which kind of form and structure, will have an absorption portion for being used for absorbing solar radiation
Part, the absorption of the structure of heat collector to solar energy play an important role.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of new solar energy collector system, so as to effective profit
Use solar energy.
To achieve these goals, technical scheme is as follows：A kind of solar energy collector system, including thermal-arrest
Pipe, speculum and collecting plate, connected by collecting plate between adjacent two thermal-collecting tubes, so that multiple thermal-collecting tubes and adjacent
Tube plate structure is formed between collecting plate；The tube plate structure parabolically shape structure or arc-shaped structure, the parabola or circle
The bending direction of arc and the parabolic structure of speculum on the contrary, the focus of tube plate structure and the focus of speculum on a point.
The projection of augmentation of heat transfer is provided on the thermal-collecting tube lower wall surface relative with speculum, to strengthen the suction to solar energy
Receive, extend along thermal-collecting tube middle part to both sides, the height of projection of the lower wall surface of thermal-collecting tube is more and more lower.
The projection of augmentation of heat transfer is provided on the thermal-collecting tube lower wall surface relative with speculum, to strengthen the suction to solar energy
Receive, extend along thermal-collecting tube middle part to both sides, the density of protrusions of the lower wall surface of thermal-collecting tube is more and more lower.
Surfaces of collector tubes applies heat-sink shell, and the heat-sink shell includes infrared reflection coating from thermal-collecting tube, inhaled successively from inside to outside
The thickness of hot coating and antireflection coatings, wherein infrared reflection coating, heat absorbing coating and antireflection coatings be respectively 0.17um,
0.65um、0.15um；The infrared reflection coating is from inside to outside Cu, Ag two layers, and two layers of thickness proportion is 11:5；Heat absorption applies
Layer includes NbN, TiAl, Cr successively from inside to outside2O3Three layers, three layers of thickness proportion is 10:3:4；Antireflection coatings are from interior
Outwards it is Nb successively2O5, Al2O3, SiO2And Si3N4Four layers, wherein four layers of thickness proportion is 5:4:4:2.
Extend in the middle part of along thermal-collecting tube to both sides, the caliber of thermal-collecting tube can be less and less.
Extend in the middle part of along thermal-collecting tube to both sides, the width of the collecting plate between two thermal-collecting tubes of connection is increasing.
Solar energy collector system, in addition to the radiator being connected with heat collector by pipeline, radiator include upper header
Finned tube with lower collector pipe and positioned at upper lower collector pipe, described finned tube are cylindricality finned tube, and the finned tube includes being located at
The cuboid of center and the fins set positioned at cuboid periphery, the cross section of the cuboid are squares, from transversal
Seen on face, the fins set includes the to stretch out from four square main fins diagonally to stretch out and from main fin
One secondary fin, the fins set also include the second secondary fin to stretch out from four sides of square, the same main fin
The the first secondary fin extended to same direction is parallel to each other, and the second secondary fin with extending to same direction is parallel to each other,
The end of the main fin and the extension of secondary fin forms equilateral octagon.
Angle between the first described secondary fin and main fin is 45 °, and the distance of described adjacent secondary fin is L1,
The square length of side is L0, and the height of the main fin is L2, and the relation of above-mentioned three meets equation below：
L1/L0=a*ln (L2/L0)+b, wherein ln is logarithmic function, 0.22<a<0.24,0.20<b<0.23,
40mm<=L0<=60mm,10mm<=L1<=25mm,55mm<=L2<=80mm;
0.2<L1/L0<0.42,1.2<L2/L0<2.0;0.03<L1/H<=0.15,
The height of finned tube is H, 100mm<H<300mm.
Described solar energy collector system, including the temperature difference electricity generation device being connected with heat collector progress pipeline, temperature difference hair
Electric installation includes casing, heat pipe, thermo-electric generation sheet, thermo-electric generation sheet heat radiator, controller and battery, and heat is set in casing
Pipe, one end of thermo-electric generation sheet are connected with heat pipe, and the other end is connected with radiator, and thermo-electric generation sheet also passes through controller and electric power storage
Pond is connected.
Described solar energy collector system includes temperature difference electricity generation device and radiator, the first valve, the second valve, the 3rd
Valve, temperature sensor, the heat collector connect to form circulation loop with temperature difference electricity generation device, and heat collector connects shape with radiator
Into circulation loop, the pipeline where temperature difference electricity generation device and radiator is in parallel, and heat collector absorbs solar energy, heats in heat collector
Water, the water after heating respectively enter temperature difference electricity generation device and radiator by outlet pipeline, sent out in temperature difference electricity generation device
Electricity, exchanged heat in radiator, the water flowed out in temperature difference electricity generation device and in radiator is entering collection by water return pipeline
Exchanged heat in hot device.
Compared with prior art, the present invention has the advantage that：
1）Solar energy can be made full use of, avoids the loss of solar heat, by unnecessary solar energy in the form of electric energy
Store, subsequently to use.
2) a kind of new temperature difference electricity generation device is provided, meets the needs of solar energy；
3）The present invention obtains an optimal radiator optimum results, and carry out by experiment by test of many times
Checking, so as to demonstrate the accuracy of result.
4）By central controller, realize and valve is automatically controlled, so as to realize effective utilization of solar energy.
5）By the shape of the parabolical flat tube of the thermal-collecting tube of heat collector, the absorption solar energy being optimal.
6）The present invention carries out meticulous selection and experiment to the material and thickness of heat-sink shell, has reached the skill of best heat absorption
Art effect.
7）The structure of heat collector is reasonably designed, avoids heat collector local temperature from overheating.
Brief description of the drawings
Fig. 1 is the schematic diagram of solar energy collector system
Fig. 2 is the structural representation of temperature difference electricity generation device
Fig. 3 is fin tube structure schematic diagram
Fig. 4 is heat spreader structures schematic diagram
Fig. 5 is collector structure schematic diagram
Fig. 6 is the partial schematic diagram of Fig. 3 fin tube structure
Fig. 7 is the side view of Fig. 3 finned tube
Fig. 8 is the schematic diagram of adjacent fins pipe connection
Reference is as follows：
1 heat collector, 2 temperature difference electricity generation devices, 3 radiators, 4 valves, 5 valves, 6 temperature sensors, 7 temperature difference electricity generation devices enter
Mouth pipe, 8 heat collector outlet pipelines, 9 cuboid base tubes, 10 base tubes, 11 main fins, 12 second secondary fins, 13 first secondary fins, 14
Casing, 15 controllers, 16 radiator inlet pipes, 17 heat collector water return pipelines, 18 valves, 19 temperature sensors, 20 thermal-collecting tubes, 21
Speculum, 21 thermal-collecting tube lower wall surfaces, 22 collecting plates, 23 heat pipes, 24 thermo-electric generation sheets, 25 thermo-electric generation sheet heat radiators, 26 electric power storages
Pond, 27 users.
Embodiment
The embodiment of the present invention is described in detail below in conjunction with the accompanying drawings.
A kind of solar energy collector system, as shown in figure 1, the system includes heat collector 1, temperature difference electricity generation device 2 and dissipated
Hot device 3, valve 4, valve 5, valve 18, temperature sensor 6, the heat collector 1 connect formation with temperature difference electricity generation device 2 and are recycled back to
Road, heat collector 1 connect to form circulation loop with radiator 3, and the pipeline where temperature difference electricity generation device 2 and radiator 3 is in parallel, thermal-arrest
Device 1 absorbs solar energy, heats the water in heat collector 1, and the water after heating respectively enters temperature difference electricity generation device 2 by outlet pipeline 8
With radiator 3, generated electricity in temperature difference electricity generation device 2, exchanged heat in radiator 3, in temperature difference electricity generation device 2 and dissipated
The water flowed out in hot device 3 enters in heat collector 1 in process water return pipeline 17 to be exchanged heat.
In said system, while generating by solar energy in temperature difference electricity generation device 2, can utilize radiator to
Outer radiating.Certainly, radiator and temperature difference electricity generation device can be with independent operatings, or one of isolated operation.
As shown in figure 1, valve 4 is arranged on outlet pipe, for controlling into the total of temperature difference electricity generation device 2 and radiator 3
Water, valve 5 is arranged on the position of the inlet tube 16 of the pipeline where radiator 3, for controlling into the water of radiator 3
Flow, valve 18 are arranged on the position of the inlet tube 7 of the pipeline at the place of temperature difference electricity generation device 2, enter thermo-electric generation for controlling
The flow of the water of device 2, temperature sensor 6 are arranged on the opening position of the entrance of radiator 3, for measuring into radiator 3
The temperature of water.The system also includes central controller, the central controller and valve 4, valve 5, valve 18, TEMP
Device 6 carries out data connection.
Preferably, when the temperature that temperature sensor 6 measures is less than certain temperature, central controller controls valve
5 increase aperture, while control valve 18 reduces aperture, to increase the flow into the hot water of radiator 3 to increase heat dissipation capacity.When
When the temperature that temperature sensor 6 measures is higher than certain temperature, central controller controls valve 5 reduces aperture, same to time control
Valve 18 processed increases aperture, to reduce the flow into the hot water of radiator 3 to increase heat dissipation capacity.
When the temperature that temperature sensor 6 measures it is low to a certain extent when, ability meeting that now radiator externally exchanges heat
It is deteriorated, normal heating demands can not be met, this shows that the thermal-arrest ability of solar thermal collector also goes wrong, such as sunshine
It is not now very strong, or when do not have the sun at night, now valve 4 can be closed automatically, and valve 5 and valve 18 can be beaten completely
Open, the pipeline where temperature difference electricity generation device and radiator forms a circulation line, and water enters temperature difference electricity generation device, thermo-electric generation
To being heated into temperature difference electricity generation device reclaimed water, the water of heating enters in radiator 3 to be radiated the electric energy of device storage.
By above-mentioned operation, it can meet the heat-sinking capability of radiator 3 when sunray is strong, that is, meeting
After user's radiating requirements, by more than heat generated electricity by temperature difference electricity generation device 2, in the heat supply energy of solar thermal collector 1
In the case of hypodynamic, using the electric energy heat cycles water of temperature difference electricity generation device storage, to meet the radiating requirements of radiator 3.
Solar energy can be so made full use of, avoids the waste of excessive heat.
Preferably, the temperature into the water in radiator 3 can not be utilized to automatically control the flow of water, can use
The environment temperature on radiator periphery is measured, for example, the indoor temperature of measurement radiator（By setting indoor temperature transmitter）Come
The flow into the water of radiator is automatically controlled, if indoor temperature is too low, increase enters the flow of the water of radiator 3, such as
Fruit indoor temperature is too high, then reduces the flow into the water of radiator 3.
Certainly, one of flow is controlled by indoor temperature on condition that the temperature that temperature sensor 6 measures needs to be higher than one
Constant temperature degree, otherwise, when the thermal-arrest of solar thermal collector is less able, increase flow anyway, radiating effect all without
Very well.
When the pipeline where temperature difference electricity generation device and radiator forms a circulation line, when temperature sensor 6
When the temperature of measurement is less than certain temperature, controller 15 controls battery 26, improves the output power of battery 26, with
Improve the temperature of the water flowed through in temperature difference electricity generation device.When the temperature that temperature sensor 6 measures is higher than certain temperature,
Controller 15 controls battery 26, reduces the output power of battery 26, to improve the temperature of the water flowed through in temperature difference electricity generation device
Degree.
By such control, the electricity of battery can be rationally utilized, avoids the loss of electricity.
The structure of described temperature difference electricity generation device 2 is as shown in Fig. 2 the temperature difference electricity generation device 2 includes casing 14, heat pipe
23rd, thermo-electric generation sheet 24, thermo-electric generation sheet heat radiator 25, controller 15 and battery 26, casing is interior to set heat pipe 23, temperature difference hair
One end of electric piece 24 is connected with heat pipe, and the other end is connected with radiator 25, and thermo-electric generation sheet 24 also passes through controller 15 and electric power storage
Pond 26 is connected.
Preferably, thermo-electric generation sheet 24 is also connected by controller 15 with user, the electric energy required for user is provided.
Preferably, controller 15 controls, temperature difference electricity generation device is limited to meet user power utilization demand, and controller determines first
Electricity needed for user, after the electricity for then sending thermo-electric generation sheet subtracts the electricity of user again, remaining electricity is stored in
It is standby in battery 26.
Although Fig. 2 show only a thermo-electric generation sheet, but be not limited to one in practice, can set multiple with full
The demand to generate electricity enough.
Preferably, the radiator for finned tubular radiator, concrete structure is referring to Fig. 4.Finned tube includes upper header 10
With lower collector pipe 10 and the finned tube positioned at upper lower collector pipe.Described finned tube is cylindricality finned tube, and the finned tube includes position
Cuboid 9 in center and the fins set positioned at cuboid periphery, the cross section of the cuboid 9 is square, from
Seen on cross section, the fins set is included from four square main fins 11 diagonally to stretch out and outside from main fin 11
First secondary fin 13 of extension, the fins set also includes the second secondary fin 12 to stretch out from four sides of square, described
The the first secondary fin 13 extended to same direction of same main fin 11 is parallel to each other, and second with extending to same direction
Secondary fin 12 is parallel to each other, and the end that the main fin 11 and secondary fin 12,13 extend forms equilateral octagon.
Preferably, as shown in figure 3, the plane specular that finned tube is formed along square diagonal, while along
The plane that line where the midpoint of two opposite side of square is formed is also specular.
Preferably, as shown in figure 3, the center line of main fin 11 it is vertical with equilateral octagonal a line and with equilateral eight side
The tie point of shape is located at the midpoint on equilateral octagonal side.
As shown in Figure 3, it is preferred that the second secondary fin 2 ", 2 ' is arranged on the diagonal opening position of square.
As shown in figure 3,1 ', 2 ', 1 ", 2 " signified secondary fins are the second secondary fin, 3 ', 4 ', 5 ', 3 ", 4 ", 5 " institutes
The secondary fin of finger is the first secondary fin.
The length of first secondary fin is with shorter and shorter apart from the diagonal distance of main fin.
Square side length it is certain in the case of, main fin and secondary fin are longer, then heat transfer effect is better in theory,
Found during experiment, when main fin and secondary fin reach certain length, then heat transfer effect just increases very not clear
It is aobvious, it is primarily due to as main fin and secondary finned length increase, it is also more and more lower in the temperature of flight tip, as temperature reduces
To a certain extent, then it can cause heat transfer effect unobvious, conversely also add the cost of material, meanwhile, in heat transfer process, if
Finned tube height is too high or secondary fin between spacing it is too small, the deterioration of heat transfer effect is also easily caused, because with height
Increase, boundary layer is thickening, and boundary layer mutually coincides between causing adjacent fins, deteriorate heat transfer, finned tube height it is too low or
Spacing between secondary fin causes heat exchange area to reduce very much greatly, have impact on the transmission of heat, thus adjacent secondary fin away from
Meet the size relationship of an optimization from, the length of side of square, between the length of main fin and the height of finned tube.
Therefore, the present invention is the optimal wing summed up by thousands of secondary test datas of multiple various sizes of finned tubes
The dimensionally-optimised relation of piece pipe.
Angle between the first described secondary fin and main fin is 45 °, and the distance of described adjacent secondary fin is L1,
The square length of side is L0, and the height of the main fin is L2, and the relation of above-mentioned three meets equation below：
L1/L0=a*ln (L2/L0)+b, wherein ln is logarithmic function, 0.22<a<0.24,0.20<b<0.23,
40mm<=L0<=60mm,10mm<=L1<=25mm,55mm<=L2<=80mm;
0.2<L1/L0<0.42,1.2<L2/L0<2.0;0.03<L1/H<=0.15。
Preferably, the height of finned tube is H, 100mm<H<300mm.It is preferred that 150-220mm.
As shown in fig. 7, the height H of finned tube only calculates the height of the part with fin.
Preferable a=0.24, b=0.22,10mm<=L1<=14mm.
It should be noted that the distance L1 of adjacent pair fin is the distance counted since the center of secondary fin.
By being tested again after result of calculation, by calculating the numerical value on border and median, the result of gained is basic
Upper to be matched with formula, error is substantially within 3%, and maximum relative error is no more than 5%, and mean error is 1.8%.
Preferably, the distance of described adjacent secondary fin is identical.Between wherein first secondary fin 13 and main fin 12
Angle, which is 45 °, means secondary fin 13 perpendicular to the diagonal a line of main fin, simultaneously as secondary fin is parallel to each other so that the
Second mate's fin is perpendicular to the square side that it extends.Mainly fully radiated to reduce flow dead, prismatic finned tube week
The form that the fin design enclosed is respectively perpendicular into four sides with middle cuboid.
Preferably, the width of main fin is greater than the width of secondary fin.
Preferably, the width of main fin is b4, and the width of secondary fin is b2, wherein 2.5*b2<b4<3.5*b2;
As preferred, the width and the length relation on the side of square of main fin are 0.06*L0<b4<0.10*L0.
Preferably, the pipe thickness of the pipe of cuboid 9 is 1-3mm, preferably 2mm.
Preferably, as shown in figure 8, adjacent fins pipe is leaning closely against together, also interconnected between its corresponding fin, from
And form the passage of air.
Preferably, the structure of heat collector is as shown in figure 5, including thermal-collecting tube 20, speculum 21 and collecting plate 22, and adjacent two
Connected between individual thermal-collecting tube 20 by collecting plate 22, so that forming tube sheet knot between multiple thermal-collecting tubes and adjacent collecting plate
Structure；The tube plate structure parabolically shape structure or arc-shaped structure, the bending direction and speculum of the parabola or circular arc
21 parabolic structure on the contrary, the focus of tube plate structure and the focus of speculum 21 on a point.By setting such a structure,
The endotherm area of thermal-collecting tube can be expanded, the wide part that speculum reflects all is reflexed to thermal-collecting tube or coupled collection
On hot plate, while the reflected light of thermal-collecting tube reflexes to thermal-collecting tube and collecting plate again by speculum, absorbs thermal-collecting tube more
Heat.
Preferably, along thermal-collecting tube middle part（That is A points）To both sides（That is 2 points of B, C）Extension, the caliber of thermal-collecting tube can be more next
It is smaller.Main cause is that middle part is heated most, and is extended from middle part to both sides, and absorbing heat gradually reduces.By caliber not
Disconnected reduction, being heated evenly for whole thermal-collecting tube reclaimed water can make it that, avoid that medium temperature is too high and both sides temperature is too low.So
The material of the thermal-collecting tube of centre can also be avoided to be easily damaged at high temperature, the temperature of whole thermal-collecting tube can be kept equal
It is even, increase the service life.
Preferably, along thermal-collecting tube middle part（That is A points）To both sides（That is 2 points of B, C）The distance between extension, thermal-collecting tube are more
The width for carrying out more remote, i.e., collecting plate between two thermal-collecting tubes of connection is increasing.Main cause is that middle part is heated most, and from
Middle part extends to both sides, and absorbing heat gradually reduces.By the continuous increase of collecting plate width, whole thermal-collecting tube can be caused
Reclaimed water is heated evenly, and avoids that medium temperature is too high and both sides temperature is too low.The material of the thermal-collecting tube of centre can also so be avoided
Material is easily damaged at high temperature for a long time, and the temperature of whole thermal-collecting tube can be kept uniform, increased the service life.
The lower wall surface of thermal-collecting tube（The face relative with speculum 21）On be provided for the projection of augmentation of heat transfer, to strengthen to too
The absorption of positive energy.To both sides in the middle part of along thermal-collecting tube（That is the left and right sides direction of Fig. 5 thermal-collecting tubes 20）Extension, the lower wall of thermal-collecting tube
The height of projection in face is more and more lower.Main cause is that middle part is heated most, and is extended from middle part to both sides, absorbs heat and gradually drops
It is low.By the continuous reduction of height of projection, being heated evenly for whole thermal-collecting tube reclaimed water can be caused, avoid medium temperature too high
And both sides temperature is too low.It can also so avoid the material of the thermal-collecting tube of centre from being easily damaged at high temperature, can keep
The temperature of whole thermal-collecting tube is uniform, increases the service life.
Preferably, along in the middle part of thermal-collecting tube to both sides（That is the left and right sides direction of Fig. 5 thermal-collecting tubes 20）Extension, thermal-collecting tube
Lower wall surface density of protrusions it is more and more lower.Main cause is that middle part is heated most, and is extended from middle part to both sides, absorbs heat
Gradually reduce.By the continuous reduction of density of protrusions, being heated evenly for whole thermal-collecting tube reclaimed water can be caused, avoid middle temperature
Spend high and both sides temperature is too low.The material of the thermal-collecting tube of centre can also be so avoided to be easily damaged at high temperature, can
To keep the temperature of whole thermal-collecting tube uniform, increase the service life.
The surface of thermal-collecting tube 20 apply heat-sink shell, the heat-sink shell from thermal-collecting tube from inside to outside successively include infrared reflection coating,
The thickness of heat absorbing coating and antireflection coatings, wherein infrared reflection coating, heat absorbing coating and antireflection coatings is respectively
0.17um、0.65um、0.15um；The infrared reflection coating is from inside to outside Cu, Ag two layers, and two layers of thickness proportion is 11:
5；Heat absorbing coating includes NbN, TiAl, Cr successively from inside to outside2O3Three layers, three layers of thickness proportion is 10:3:4；Antireflective
Coating is Nb successively from inside to outside2O5, Al2O3, SiO2And Si3N4Four layers, wherein four layers of thickness proportion is 5:4:
4:2。
In above layers, by increasing the thickness proportion of heat absorbing coating, the thickness of infrared reflecting layer and antireflection layer is reduced,
The absorption to solar energy can be significantly increased, meanwhile, the material of each layer by adjusting infrared reflecting layer and antireflection layer
Thickness proportion, can also realize the degree for reducing reflection to sunshine.
Above-mentioned dimension scale is the optimal result got by nearly hundred kinds of different thickness proportion experiments.Pass through reality
Test, for the composition and thickness using each independent stratum in above-mentioned absorber coatings, the absorptance of the absorber coatings of preparation can be made big
In 0.95, and realize 0.04 emissivity.
For the manufacture method of above-mentioned coating, can use this area pass through frequently with vacuum magnetron sputtering coating film technique system
It is standby.
Although the present invention is disclosed as above with preferred embodiment, the present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention, it can make various changes or modifications, therefore protection scope of the present invention should
It is defined when by claim limited range.
Claims (2)
1. a kind of solar energy collector system, including thermal-collecting tube, speculum and collecting plate, pass through between adjacent two thermal-collecting tubes
Collecting plate connects, so that forming tube plate structure between multiple thermal-collecting tubes and adjacent collecting plate；The tube plate structure is in parabolic
Linear structure or arc-shaped structure, the bending direction of the parabola or circular arc and the parabolic structure of speculum are on the contrary, tube sheet
The focus of structure and the focus of speculum are on a point；Characterized in that, set on the thermal-collecting tube lower wall surface relative with speculum
The projection for augmentation of heat transfer is put, to strengthen the absorption to solar energy, is extended along thermal-collecting tube middle part to both sides, under thermal-collecting tube
The height of projection of wall is more and more lower.
2. solar energy collector system according to claim 1, in addition to the radiator being connected with heat collector by pipeline,
Radiator includes upper header and lower collector pipe and the finned tube positioned at upper lower collector pipe, and described finned tube is cylindricality finned tube, institute
Stating finned tube includes the cuboid positioned at center and the fins set positioned at cuboid periphery, the cross section of the cuboid
It is square, from cross section, the fins set includes main fin and secondary fin, and the main fin is from four square pairs
Angle stretches out, and the secondary fin includes the first secondary fin to stretch out from main fin and stretched out from four sides of square
The second secondary fin, the first secondary fin extended to same direction of same main fin is parallel to each other, and with to same direction
Second secondary fin of extension is parallel to each other, and the end of the main fin and the extension of secondary fin forms equilateral octagon；
Angle between the first described secondary fin and main fin is 45 °, and the distance of described adjacent secondary fin is L1, described
The length of side of square is L0, and the height of the main fin is L2, and the relation of above-mentioned three meets equation below：
L1/L0=a*ln (L2/L0)+b, wherein ln is logarithmic function, 0.22<a<0.24,0.20<b<0.23,
40mm<=L0<=60mm,10mm<=L1<=25mm,55mm<=L2<=80mm;
0.2<L1/L0<0.42,1.2<L2/L0<2.0;0.03<L1/H<=0.15。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610246094.XA CN105910299B (en) | 2014-07-17 | 2014-07-17 | A kind of solar energy collector system of thermal-collecting tube lower wall surface height of projection change |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610246094.XA CN105910299B (en) | 2014-07-17 | 2014-07-17 | A kind of solar energy collector system of thermal-collecting tube lower wall surface height of projection change |
| CN201410339674.4A CN104075463B (en) | 2014-07-17 | 2014-07-17 | A kind of arc tube plate-type solar thermal collector system |
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| CN201410339674.4A Division CN104075463B (en) | 2014-07-17 | 2014-07-17 | A kind of arc tube plate-type solar thermal collector system |
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| CN105910299B true CN105910299B (en) | 2018-01-09 |
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| CN201510157829.7A Active CN104764223B (en) | 2014-07-17 | 2014-07-17 | The arc tube plate-type solar thermal collector system that a kind of caliber changes |
| CN201410339674.4A Active CN104075463B (en) | 2014-07-17 | 2014-07-17 | A kind of arc tube plate-type solar thermal collector system |
| CN201510414397.3A Active CN105042898B (en) | 2014-07-17 | 2014-07-17 | A kind of tube-sheet type solar energy collector system of caliber change |
| CN201510414395.4A Active CN105066472B (en) | 2014-07-17 | 2014-07-17 | A kind of solar energy collector system automatically controlling fluid flow direction |
| CN201510414335.2A Active CN104990289B (en) | 2014-07-17 | 2014-07-17 | Solar heat collector system with variable tube plate width |
| CN201510414334.8A Active CN104990288B (en) | 2014-07-17 | 2014-07-17 | Tube-plate type solar heat collector system with variable protrusion height |
| CN201610246094.XA Active CN105910299B (en) | 2014-07-17 | 2014-07-17 | A kind of solar energy collector system of thermal-collecting tube lower wall surface height of projection change |
| CN201610246096.9A Expired - Fee Related CN105910301B (en) | 2014-07-17 | 2014-07-17 | A kind of solar energy collector system of collecting plate change width |
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| CN201510157829.7A Active CN104764223B (en) | 2014-07-17 | 2014-07-17 | The arc tube plate-type solar thermal collector system that a kind of caliber changes |
| CN201410339674.4A Active CN104075463B (en) | 2014-07-17 | 2014-07-17 | A kind of arc tube plate-type solar thermal collector system |
| CN201510414397.3A Active CN105042898B (en) | 2014-07-17 | 2014-07-17 | A kind of tube-sheet type solar energy collector system of caliber change |
| CN201510414395.4A Active CN105066472B (en) | 2014-07-17 | 2014-07-17 | A kind of solar energy collector system automatically controlling fluid flow direction |
| CN201510414335.2A Active CN104990289B (en) | 2014-07-17 | 2014-07-17 | Solar heat collector system with variable tube plate width |
| CN201510414334.8A Active CN104990288B (en) | 2014-07-17 | 2014-07-17 | Tube-plate type solar heat collector system with variable protrusion height |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104990288B (en) | 2016-08-17 |
| CN105910301A (en) | 2016-08-31 |
| CN105042898A (en) | 2015-11-11 |
| CN104764223B (en) | 2016-05-11 |
| CN104075463B (en) | 2015-09-23 |
| CN105042898B (en) | 2016-08-17 |
| CN105910299A (en) | 2016-08-31 |
| CN104990289A (en) | 2015-10-21 |
| CN104990288A (en) | 2015-10-21 |
| CN104764223A (en) | 2015-07-08 |
| CN105066472B (en) | 2016-08-17 |
| CN104990289B (en) | 2016-08-17 |
| CN105066472A (en) | 2015-11-18 |
| CN105910301B (en) | 2017-11-17 |
| CN104075463A (en) | 2014-10-01 |
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