CN104075464B - Solar heat collector system with heat storage function - Google Patents
Solar heat collector system with heat storage function Download PDFInfo
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- CN104075464B CN104075464B CN201410339669.3A CN201410339669A CN104075464B CN 104075464 B CN104075464 B CN 104075464B CN 201410339669 A CN201410339669 A CN 201410339669A CN 104075464 B CN104075464 B CN 104075464B
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- 238000005338 heat storage Methods 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000003860 storage Methods 0.000 claims description 38
- 239000000463 material Substances 0.000 claims description 28
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 7
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 239000011232 storage material Substances 0.000 abstract 4
- 238000004134 energy conservation Methods 0.000 abstract 1
- 238000000576 coating method Methods 0.000 description 14
- 239000011248 coating agent Substances 0.000 description 9
- 238000012546 transfer Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 229910004298 SiO 2 Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 229910010413 TiO 2 Inorganic materials 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 4
- 229910010293 ceramic material Inorganic materials 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000011514 reflex Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 241000127225 Enceliopsis nudicaulis Species 0.000 description 1
- 229910010038 TiAl Inorganic materials 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 238000001755 magnetron sputter deposition Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
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Classifications
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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
Abstract
The invention provides a solar heat collector system which comprises a heat collector, a heat storage device, a water outlet pipe and a water return pipe. The heat collector and the heat storage device are connected through a pipeline, the heat storage device comprises a shell, a heat storage material is arranged in the shell, a water pipe of the solar heat collector system is arranged in a heat storage material, the water pipe is of a coiler structure, heat exchange is carried out between water in the water pipe and the heat storage material, and absorbed solar energy is transmitted to the heat storage material and then is returned to the heat collector for heating. The solar heat collector system has an automatic heat storage function, can effectively make use of excess solar energy, and achieves the effects of energy conservation and environment protection.
Description
Technical field
The invention belongs to field of solar energy, particularly relate to a kind of solar energy collector system with storage heater.
Background technology
Along with the high speed development of modern social economy, the demand of the mankind to the energy is increasing.But the traditional energy storage levels such as coal, oil, natural gas constantly reduce, day by day in short supply, cause rising steadily of price, simultaneously the problem of environmental pollution that causes of conventional fossil fuel is also further serious, and these limit the development of society and the raising of human life quality all greatly.One of energy problem's most distinct issues having become contemporary world.Thus seek the new energy, particularly free of contamination clean energy resource has become the focus of present people research.
Solar energy is a kind of inexhaustible clean energy resource, and stock number is huge, and the solar radiant energy total amount that earth surface is received every year is 1 × 10
18kWh, for world's year consumes more than 10,000 times of gross energy.Countries in the world are all using as new energy development important one of the utilization of solar energy, and the Chinese government also clearly proposes to want develop actively new forms of energy at Report on the Work of the Government already, and wherein the utilization of solar energy is especially in occupation of prominent position.But arrive tellurian energy density little (about a kilowatt every square metre) due to solar radiation, and be again discontinuous, this brings certain difficulty to large-scale exploitation.Therefore, in order to extensively utilize solar energy, not only want the problem on technical solution, and must be able to compete mutually with conventional energy resource economically.
The solar energy that solar thermal collector absorbs may produce surplus now in some cases, and now this part solar energy may lose, and therefore needs a kind of heat to surplus to make full use of.
Summary of the invention
Technical problem to be solved by this invention is the Solar Energy Heat Utilization System providing a kind of auto accumulation heat function, thus the effective solar energy utilizing surplus.
To achieve these goals, technical scheme of the present invention is as follows: a kind of solar energy collector system, comprise heat collector, storage heater, outlet pipe and return pipe, described heat collector is connected by pipeline with storage heater, described storage heater comprises housing, heat-storing material is provided with in housing, the water pipe of Solar Energy Heat Utilization System is arranged in heat-storing material, described water pipe is coiled pipe structure, water in water pipe and heat-storing material carry out heat exchange, the solar energy of absorption is passed to heat-storing material, then returns heat collector by return pipe and heat.
Described heat-storing material is ceramic material, and the mass component of described ceramic material is as follows: SiO
230-32%, 5.1-5.3%Li
2o, 6.5-7.8%TiO
2, 3.3-3.5%MgO, 1.0-1.3%La
2o
3, 2.45-2.55%BaO, remaining is Al
2o
3.
Preferably, SiO
231%, 5.22%Li
2o, 6.85%TiO
2, 3.4%MgO, 1.1%La
2o
3, 2.5%BaO, remaining is Al
2o
3.
Described system also comprises radiator, radiator comprises upper header and lower collector pipe and is positioned at the finned tube of lower collector pipe, described finned tube is cylindricality finned tube, described finned tube comprises the cuboid being positioned at center and the fins set being positioned at cuboid periphery, the cross section of described cuboid is square, from cross section, described fins set comprises from four outward extending main fins in foursquare diagonal angle with from the outward extending first secondary fin of main fin, described fins set also comprises the outward extending second secondary fin from foursquare four limits, the first secondary fin extended to same direction of described same main fin is parallel to each other, and it is parallel to each other with the second secondary fin extended to same direction, the end that described main fin and secondary fin extend forms equilateral octagon.
The pipeline at described radiator place and the pipeline at storage heater place are parallel-connection structure.
Angle between described first secondary fin and main fin is 45 °, and the distance of described adjacent secondary fin is L1, and the described foursquare length of side is L0, and the height of described main fin is L2, and the relation of above-mentioned three meets following formula:
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.
Compared with prior art, the present invention has following advantage:
1) can solar energy be made full use of, avoid the loss of solar heat, unnecessary storage of solar energy is got up, so that follow-up use.
2) provide a kind of new heat-storing material, meet the demand of accumulation of heat;
3) the present invention is by test of many times, obtains an optimum finned tube optimum results, and is verified by test, thus demonstrate the accuracy of result.
4) by central controller, realize the automatic control to valve, thus realize effective utilization of solar energy.
5) by the shape of the parabolical flat tube of the thermal-collecting tube of heat collector, optimum absorption solar energy is reached.
6) the present invention carries out meticulous selection and experiment to the material of heat-sink shell and thickness, has reached the technique effect of best heat absorption.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of solar energy collector system
Fig. 2 is the structural representation of storage heater
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 the fin tube structure of Fig. 3
Fig. 7 is the side view of the finned tube of Fig. 3
Fig. 8 is the schematic diagram that adjacent fins pipe connects
Reference numeral is as follows:
1 heat collector, 2 storage heaters, 3 radiators, 4 valves, 5 valves, 6 temperature sensors, 7 accumulator inlet pipes, 8 heat collector outlet pipelines, 9 cuboid base tubes, 10 base tubes, 11 main fins, 12 second secondary fins, 13 first secondary fins, 14 housings, 15 heat-storing materials, 16 radiator inlet tubes, 17 heat collector water return pipelines, 18 valves, 19 temperature sensors, 20 thermal-collecting tubes, 21 speculums, 21 thermal-collecting tube lower wall surfaces.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
A kind of solar energy collector system, as shown in Figure 1, described system comprises heat collector 1, storage heater 2 and radiator 3, valve 4, valve 5, valve 18, temperature sensor 6, described heat collector 1 is communicated with storage heater 2 and forms closed circuit, heat collector 1 is communicated with radiator 3 and forms closed circuit, the pipeline at storage heater 2 and radiator 3 place is in parallel, heat collector 1 absorbs solar energy, water in heating heat collector 1, water after heating enters storage heater 2 and radiator 3 respectively by outlet pipeline 8, heat exchange is carried out in storage heater 2, by heat storage in the heat-storing material of storage heater 2, heat exchange is carried out in radiator 3, the water flowed out in storage heater 2 and in radiator 3 carries out heat exchange entering in heat collector 1 through water return pipeline 17.
In said system, by solar energy while carrying out accumulation of heat to storage heater, radiator can be utilized outwards to dispel the heat.Certainly, storage heater and radiator can independent operatings, or isolated operation one of them.
As shown in Figure 1, valve 4 is arranged on outlet pipe, for controlling the total water yield entering storage heater 2 and radiator 3, valve 5 is arranged on the position of the inlet tube 16 of the pipeline at radiator 3 place, for controlling the flow of the water entering radiator 3, valve 18 is arranged on the position of the inlet tube 7 of the pipeline at storage heater 2 place, for controlling the flow of the water entering storage heater 2, temperature sensor 6 is arranged on the position of the entrance of radiator 3, for measuring the temperature of the water entering radiator 3.Described system also comprises central controller, and described central controller and valve 4, valve 5, valve 18, temperature sensor 6 carry out data cube computation.
Preferably, when the temperature that temperature sensor 6 is measured lower than certain temperature time, central controller controls valve 5 strengthens aperture, and simultaneously by-pass valve control 18 reduces aperture, to strengthen the flow of the hot water entering radiator 3 to strengthen heat dissipation capacity.When the temperature that temperature sensor 6 is measured higher than certain temperature time, central controller controls valve 5 reduces aperture, and simultaneously by-pass valve control 18 strengthens aperture, to reduce the flow of the hot water entering radiator 3 to strengthen heat dissipation capacity.
When temperature sensor 6 measure temperature low to a certain extent time, the ability of the now external heat exchange of radiator can be deteriorated, normal heating demands cannot be met, this shows that the thermal-arrest ability of solar thermal collector also goes wrong, such as sunshine is not now very strong, or when there is no the sun evening, now valve 4 can be closed automatically, valve 5 and valve 18 can be opened completely, the pipeline at storage heater and radiator place forms a circulation line, water enters in storage heater the heat absorbing and store in storage heater, and the water of heating enters in radiator 3 and dispels the heat.
By above-mentioned operation, can when sunray be strong, meeting the heat-sinking capability of radiator 3, namely after meeting user's radiating requirements, unnecessary heat is stored by storage heater 2, when solar thermal collector 1 heat capacity deficiency, the heat in storage heater 2 is made full use of, to meet the radiating requirements of radiator 3.Can solar energy be made full use of like this, avoid the waste of too much heat.
As preferably, the temperature of the water entered in radiator 3 can not be utilized automatically to control the flow of water, the environment temperature measuring radiator periphery can be adopted, such as, the indoor temperature (by arranging indoor temperature transmitter) measuring radiator controls the flow of the water entering radiator automatically, if indoor temperature is too low, then increases the flow entering the water of radiator 3, if indoor temperature is too high, then reduce the flow entering the water of radiator 3.
Certainly, the prerequisite being controlled flow by indoor temperature is that the temperature that temperature sensor 6 is measured needs higher than uniform temperature, otherwise time the thermal-arrest of solar thermal collector is less able, in any case increase flow, radiating effect all can not be fine.
When the pipeline at storage heater and radiator place forms a circulation line, when temperature sensor 6 measure temperature lower than certain temperature time, central controller controls valve 5 strengthens aperture, by-pass valve control 18 strengthens aperture, to strengthen the flow of the hot water entering radiator 3 to strengthen heat dissipation capacity simultaneously.When the temperature that temperature sensor 6 is measured higher than certain temperature time, central controller controls valve 5 reduces aperture, and simultaneously by-pass valve control 18 reduces aperture, to reduce the flow of the hot water entering radiator 3 to strengthen heat dissipation capacity.The aperture of valve 5 and 15 is now consistent.
By such control, can the heat of Appropriate application storage heater, avoid the loss of heat.
As shown in Figure 2, described storage heater 2 comprises housing 14 to the structure of described storage heater 2, is provided with heat-storing material 15 in housing 14, and water pipe is arranged in heat-storing material 15, and described water pipe is coiled pipe structure in housing.In water pipe, water and heat-storing material carry out heat exchange, transfer heat to heat-storing material 15.
Preferably, the space of heat-storing material filling housing is the 90-95% of housing volume, causes housing failure to prevent expanded by heating.
Described heat-storing material is ceramic material, and the mass component of described ceramic material is as follows: SiO
230-32%, 5.1-5.3%Li
2o, 6.5-7.8%TiO
2, 3.3-3.5%MgO, 1.0-1.3%La
2o
3, 2.45-2.55%BaO, remaining is Al
2o
3.
Preferably, SiO
231%, 5.22%Li
2o, 6.85%TiO
2, 3.4%MgO, 1.1%La
2o
3, 2.5%BaO, remaining is Al
2o
3.
Above-mentioned heat-storing material is the result obtained by test of many times, has very high heat storage capacity, is meeting the absorbing heat in solar energy system running completely.
As preferably, set temperature sensor 19 on the outlet pipeline 8 of heat collector, for measuring the temperature of the water outlet of heat collector, storage heater set temperature sensor (not shown) is for measuring the temperature of heat-storing material simultaneously.In the inlet tube 7 of storage heater, arrange valve 18, when valve 4 is opened, when the temperature of leaving water temperature lower than heat-storing material measured time, valve 18 is closed.When the temperature of leaving water temperature higher than heat-storing material measured time, valve 18 is opened.Avoid storage heater that heat is being passed to the water in water pipe like this, cause the loss of the heat in storage heater, to ensure that storage heater can store abundant heat.
Preferably, described radiator be finned tubular radiator, concrete structure is see Fig. 4.Finned tube comprises upper header 10 and lower collector pipe 10 and is positioned at the finned tube of lower collector pipe.Described finned tube is cylindricality finned tube, described finned tube comprises the cuboid 9 being positioned at center and the fins set being positioned at cuboid periphery, the cross section of described cuboid 9 is squares, from cross section, described fins set comprises from four outward extending main fins 11 in foursquare diagonal angle with from the outward extending first secondary fin 13 of main fin 11, described fins set also comprises the outward extending second secondary fin 12 from foursquare four limits, extend to same direction first secondary fin 13 of described same main fin 11 is parallel to each other, and it is parallel to each other with the extend to same direction second secondary fin 12, described main fin 11 and secondary fin 12, 13 ends extended form equilateral octagon.
Preferably, as shown in Figure 3, the plane specular that finned tube is formed along square diagonal, the plane simultaneously formed along the line at the mid point place of foursquare two opposite side is also specular.
Preferably, as shown in Figure 3, the center line of main fin 11 is vertical with an equilateral octagonal limit and be positioned at the mid point on equilateral octagonal limit with equilateral octagonal tie point.
As shown in Figure 3, preferably, the second secondary fin 2 ", the 2 ' position being arranged on foursquare diagonal angle.
As shown in Figure 3,1 ', 2 ', 1 ", 2 " the secondary fin of indication is the second secondary fin, 3 ', 4 ', 5 ', 3 ", 4 ", 5 " the secondary fin of indication is the first secondary fin.
The length of the first secondary fin is along with shorter and shorter apart from the distance at main fin diagonal angle.
When the length on foursquare limit is certain, main fin and secondary fin longer, then heat transfer effect is better in theory, find in process of the test, when main fin and secondary fin reach certain length time, then heat transfer effect just increases very not obvious, main because along with main fin and the increase of secondary finned length, also more and more lower in the temperature of flight tip, along with temperature is reduced to a certain degree, heat transfer effect then can be caused not obvious, also add the cost of material on the contrary, simultaneously, in heat transfer process, if finned tube height is too high or spacing between secondary fin is too little, also the deterioration of heat transfer effect is easily caused, because along with the increase of height, boundary layer is thickening, boundary layer between adjacent fins is caused to overlap mutually, worsen heat transfer, spacing between the too low or secondary fin of finned tube height causes too greatly heat exchange area to reduce, have impact on the transmission of heat, therefore in the distance of adjacent secondary fin, the foursquare length of side, an optimized size relationship is met between the length of main fin and the height of finned tube.
Therefore, the present invention is the dimensionally-optimised relation of the finned tube of the best summed up by thousands of test datas of the finned tube of multiple different size.
Angle between described first secondary fin and main fin is 45 °, and the distance of described adjacent secondary fin is L1, and the described foursquare length of side is L0, and the height of described main fin is L2, and the relation of above-mentioned three meets following formula:
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.Preferred 150-220mm.
As shown in Figure 7, the height H of finned tube only calculates the height of the part with fin.
Preferred 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 from the center of secondary fin.
By testing after result of calculation, by the numerical value of computation bound and median, the result of gained matches with formula substantially, and error is substantially within 3%, and maximum relative error is no more than 5%, and mean error is 1.8% again.
Preferably, the distance of described adjacent secondary fin is identical.Angle wherein between the first secondary fin 13 and main fin 12 is 45 ° and means the limit of secondary fin 13 perpendicular to main fin diagonal angle, simultaneously because secondary fin is parallel to each other, makes the foursquare limit that the second secondary fin extends perpendicular to it.Mainly fully dispel the heat for reducing flow dead, the fin design around prismatic finned tube becomes the form vertical respectively with four limits of middle cuboid.
As 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 preferably, the width of main fin and the length relation on foursquare limit are 0.06*L0<b4<0.10*L0.
As preferably, the pipe thickness of cuboid 9 pipe is 1-3mm, preferred 2mm.
Preferably, as shown in Figure 8, adjacent fins pipe is closely close together, and is also connected to each other between its corresponding fin, thus forms the passage of air.
Preferably, the structure of heat collector as shown in Figure 5, comprise thermal-collecting tube 20, thermal-collecting tube 20 is flat tube, described flat tube is shape structure or arc-shaped structure parabolically, the bending direction of described parabola or circular arc is contrary with the parabolic structure of speculum 21, and the focus of thermal-collecting tube 19 and the focus of speculum 21 are on a point.By arranging this kind of structure, can expand the endotherm area of thermal-collecting tube, the wide part that speculum is reflected all reflexes in thermal-collecting tube, and the reverberation of thermal-collecting tube reflexes to thermal-collecting tube again by speculum simultaneously, makes thermal-collecting tube absorb more heat.
Preferably, in the middle part of thermal-collecting tube, (i.e. A point) extends to both sides (i.e. B, C two point), and the width of the upper lower wall surface of thermal-collecting tube can be more and more less.Main cause is that middle part is heated at most, and extends from middle part to both sides, absorbs heat and reduces gradually.By the continuous reduction of width, being heated evenly of water in whole thermal-collecting tube can be made, avoid that medium temperature is too high and both sides temperature is too low.The material of middle thermal-collecting tube so also can be avoided at high temperature easily to damage, the homogeneous temperature of whole thermal-collecting tube can be kept, increase the service life.
The lower wall surface 22 of thermal-collecting tube is arranged the projection being used for augmentation of heat transfer, to strengthen the absorption to solar energy.Extend to both sides (i.e. the direction, the left and right sides of Fig. 5 thermal-collecting tube 20) in the middle part of thermal-collecting tube, the height of projection of the lower wall surface of thermal-collecting tube is more and more lower.Main cause is that middle part is heated at most, and extends from middle part to both sides, absorbs heat and reduces gradually.By the continuous reduction of height of projection, being heated evenly of water in whole thermal-collecting tube can be made, avoid that medium temperature is too high and both sides temperature is too low.The material of middle thermal-collecting tube so also can be avoided at high temperature easily to damage, the homogeneous temperature of whole thermal-collecting tube can be kept, increase the service life.
As preferably, extend to both sides (i.e. the direction, the left and right sides of Fig. 5 thermal-collecting tube 20) in the middle part of thermal-collecting tube, the density of protrusions of the lower wall surface of thermal-collecting tube is more and more lower.Main cause is that middle part is heated at most, and extends from middle part to both sides, absorbs heat and reduces gradually.By the continuous reduction of density of protrusions, being heated evenly of water in whole thermal-collecting tube can be made, avoid that medium temperature is too high and both sides temperature is too low.The material of middle thermal-collecting tube so also can be avoided at high temperature easily to damage, the homogeneous temperature of whole thermal-collecting tube can be kept, increase the service life.
Thermal-collecting tube 20 surface application heat-sink shell, described heat-sink shell outwards comprises infrared reflection coating, heat absorbing coating and antireflection coatings successively in thermal-collecting tube, wherein infrared reflection coating, heat absorbing coating and antireflection coatings thickness be 0.17um, 0.65um, 0.15um respectively; Described infrared reflection coating is from inside to outside that Cu, Ag are two-layer, and two-layer thickness proportion is 11:5; Heat absorbing coating from inside to outside comprises NbN, TiAl, Cr successively
2o
3three layers, the thickness proportion of three layers is 10:3:4; Antireflection coatings is from inside to outside Nb successively
2o
5, Al
2o
3, SiO
2and Si
3n
4four layers, wherein the thickness proportion of four layers is 5:4:4:2.
In above-mentioned each layer, by strengthening the thickness proportion of heat absorbing coating, reduce the thickness of infrared reflecting layer and antireflection layer, the absorption to solar energy can be significantly increased, simultaneously, by adjusting the thickness proportion of the material of each layer of infrared reflecting layer and antireflection layer, also can realize reducing the degree to the reflection of sunshine.
Above-mentioned dimension scale is tested the result of the best got.By experiment, for the composition and the thickness that adopt each independent stratum in above-mentioned absorber coatings, the absorptance of the absorber coatings of preparation can be made to be greater than 0.95, and to realize the emissivity of 0.04.
For the manufacture method of above-mentioned coating, the vacuum magnetron sputtering coating film technique preparation that this area can be used often to adopt.
Although the present invention discloses as above with preferred embodiment, the present invention is not defined in this.Any those skilled in the art, 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 be as the criterion with claim limited range.
Claims (1)
1. a solar energy collector system, comprise heat collector, storage heater, outlet pipe and return pipe, described heat collector is connected by pipeline with storage heater, described storage heater comprises housing, is provided with heat-storing material in housing, and the water pipe of Solar Energy Heat Utilization System is arranged in heat-storing material, described water pipe is coiled pipe structure, water in water pipe and heat-storing material carry out heat exchange, and the solar energy of absorption is passed to heat-storing material, then return heat collector by return pipe and heat;
Described system also comprises radiator, radiator comprises upper header and lower collector pipe and is positioned at the finned tube of lower collector pipe, described finned tube is cylindricality finned tube, described finned tube comprises the cuboid being positioned at center and the fins set being positioned at cuboid periphery, the cross section of described cuboid is square, from cross section, described fins set comprises secondary fin and from four outward extending main fins in foursquare diagonal angle, described secondary fin comprise from the outward extending first secondary fin of main fin and from foursquare four limits outward extending second secondary fin, the first secondary fin extended to same direction of described same main fin is parallel to each other, and it is parallel to each other with the second secondary fin extended to same direction, the end that described main fin and secondary fin extend forms equilateral octagon,
The pipeline at described radiator place and the pipeline at storage heater place are parallel-connection structure;
Angle between described first secondary fin and main fin is 45 °, and the distance of described adjacent secondary fin is L1, and the described foursquare length of side is L0, and the height of described main fin is L2, and the relation of above-mentioned three meets following formula:
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；
H is the height of finned tube, 100mm<H<300mm.
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|---|---|---|---|
| CN201410339669.3A CN104075464B (en) | 2014-07-17 | 2014-07-17 | Solar heat collector system with heat storage function |
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|---|---|---|---|
| CN201410339669.3A CN104075464B (en) | 2014-07-17 | 2014-07-17 | Solar heat collector system with heat storage function |
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|---|---|---|---|---|
| CN105928037B (en) * | 2015-04-07 | 2018-02-06 | 青岛中正周和科技发展有限公司 | A kind of solar heat-preservation system of height of projection rule change |
| CN105276844B (en) * | 2015-10-29 | 2018-08-17 | 芜湖航天特种电缆厂股份有限公司 | A kind of plate-fin solar heat-preservation system |
| CN106091434B (en) * | 2015-10-29 | 2018-05-25 | 于仁麟 | A kind of hot water storage tank of finned length variation |
| CN107120852B (en) * | 2016-01-12 | 2019-02-05 | 山东理工大学 | The solar heat-preservation system that multisensor automatically controls |
| CN111707011B (en) * | 2018-08-03 | 2021-09-03 | 青岛乾福圣耀商贸有限公司 | Design method of condensation end of temperature equalizing pipe of solar system |
-
2014
- 2014-07-17 CN CN201410339669.3A patent/CN104075464B/en not_active Expired - Fee Related
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| CN104075464A (en) | 2014-10-01 |
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