CN104764226B - A kind of loop circuit heat pipe solar energy collector system - Google Patents
A kind of loop circuit heat pipe solar energy collector system Download PDFInfo
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- CN104764226B CN104764226B CN201510101999.3A CN201510101999A CN104764226B CN 104764226 B CN104764226 B CN 104764226B CN 201510101999 A CN201510101999 A CN 201510101999A CN 104764226 B CN104764226 B CN 104764226B
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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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Abstract
The invention provides a kind of loop circuit heat pipe solar energy collector system, comprise solar thermal collector, water tank and loop circuit heat pipe, wherein the evaporator section of loop circuit heat pipe is heat collector, and the condensation segment of loop circuit heat pipe is arranged in water tank; Heat collector absorbs the heat of solar energy, and enter the condensation segment of loop circuit heat pipe after the water in heat collector evaporates, condensation segment carries out heat release, the water in heating water tank, and after condensation segment heat release completes, recirculation enters in heat collector and heats.The present invention adopts loop heat pipe structure, and using heat collector as loop heat pipe evaporator, better utilizes solar energy, reaches the effect of environmental protection and energy saving.
Description
Technical field
The invention belongs to field of solar energy, particularly relate to a kind of solar energy collector system.
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 in endothermic process, hot-spot can be produced and heat uneven phenomenon, cause hot-spot, overheated boiling in thermal-collecting tube, affects the absorption of solar energy, decrease the life-span of thermal-collecting tube simultaneously, simultaneously in endothermic process, because use problem in the offering question of thermal-collecting tube and operation, cause the skew of focus, cause a part of solar energy not make full use of, cause thermal loss.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of new solar energy collector system, thus effectively utilizes solar energy.
To achieve these goals, technical scheme of the present invention is as follows: a kind of loop circuit heat pipe solar energy collector system, comprise solar thermal collector, water tank and loop circuit heat pipe, wherein the evaporator section of loop circuit heat pipe is heat collector, and the condensation segment of loop circuit heat pipe is arranged in water tank; Heat collector absorbs the heat of solar energy, and enter the condensation segment of loop circuit heat pipe after the water in heat collector evaporates, condensation segment carries out heat release, the water in heating water tank, and after condensation segment heat release completes, recirculation enters in heat collector and heats.
As preferably, solar thermal collector comprises thermal-collecting tube, speculum and collecting plate, is connected between two adjacent thermal-collecting tubes by collecting plate, thus makes to form tube plate structure between multiple thermal-collecting tube and adjacent collecting plate; Between described two pieces of tube plate structures, shape is at a certain angle, and described angle direction is relative with the circular arc line structure of speculum, between the angle that the focus of speculum is formed at tube plate structure.
As preferably, the focus of speculum is positioned on the mid point of two pieces of tube plate structure least significant end lines.
As preferably, the circular arc line diameter of speculum is R, and the length of every block tube plate structure is R1, and the diameter of thermal-collecting tube is R2, and on same tube plate structure, the distance in the center of circle of Neighbor Set heat pipe is L, and the angle between two pieces of tube sheets is a, then meet following formula:
R1/R＝c*sin(a/2)
b，
0.18<R2/L<0.34，
Wherein c, b are coefficient, 0.39<c<0.41,0.020<b<0.035;
0.38<R1/R<0.41，80°<＝a<＝150°，450mm<R1<750mm,1100mm<R<1800mm,
90mm<L<150mm,20mm<＝R2<50mm。
As preferably, c=0.4002, b=0.0275.
As preferably, along with the increase of angle a, the coefficient of c, b becomes large gradually.
A kind of loop circuit heat pipe solar energy collector system, comprise solar thermal collector, water tank and loop circuit heat pipe, wherein the evaporator section of loop circuit heat pipe is heat collector, and the condensation segment of loop circuit heat pipe is arranged in water tank; Described system also comprises thermal-collecting tube, speculum and collecting plate, is connected between two adjacent thermal-collecting tubes by collecting plate, thus makes to form tube plate structure between multiple thermal-collecting tube and adjacent collecting plate; Tube plate structure surface application heat-sink shell, described heat-sink shell outwards comprises transition zone, infrared reflection coating, heat absorbing coating, antireflection coatings and protective layer successively in tube plate structure, wherein transition zone, infrared reflection coating, heat absorbing coating, antireflection coatings and protective layer thickness be 0.03um, 0.23um, 0.77um, 0.15um, 0.12um respectively; Described transition zone is the transition zone of the compound by MF reactive magnetron sputtering method plated metal Al, Si and N formation; Described infrared reflection coating is from inside to outside W, Cr, Ag tri-layers, and the thickness proportion of three layers is 9:4:7; Heat absorbing coating from inside to outside comprises Cr, Nb, Zr, NbN, Cr successively
2o
3five layers, the thickness proportion of five layers is 9:7:4:4:5; Antireflection coatings is from inside to outside AlN, TiO successively
2, Nb
2o
5, Al
2o
3, and Si
3n
4five layers, wherein the thickness proportion of five layers is 3:6:8:9:2; The composition of protective layer is identical with transition zone.
A kind of loop circuit heat pipe solar energy collector system, comprise solar thermal collector, water tank and loop circuit heat pipe, wherein the evaporator section of loop circuit heat pipe is heat collector, and the condensation segment of loop circuit heat pipe is arranged in water tank; Described system also comprises thermal-collecting tube, speculum and collecting plate, is connected between two adjacent thermal-collecting tubes by collecting plate, thus makes to form tube plate structure between multiple thermal-collecting tube and adjacent collecting plate; The material of the thermal-collecting tube of heat collector is albronze, and the mass percent of the component of described albronze is as follows: 3.9%Cr, 3.6%Ag, 2.6%Mn, 3.25%Zr, 2.3%Ce, 1.5%Ti, 2.36%Si, all the other are Cu, Al, and the ratio of Cu, Al is 3.23:2.18.
Compared with prior art, the present invention has following advantage:
1) adopt loop circuit heat pipe, and using the evaporator section of heat collector as loop circuit heat pipe, effectively make use of solar energy.
2) make solar heat-collection plate absorb heat evenly, avoid hot-spot.
3) avoid because the solar heat that focal shift causes is lost, increase the absorption dynamics of solar energy, improve absorptivity;
4) the present invention is by test of many times, obtains an optimum solar thermal collector optimum results, and is verified by test, thus demonstrate the accuracy of result.
5) 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 loop circuit heat pipe solar thermal collector
Fig. 2 is the schematic cross-section of solar energy collector system
Fig. 3 is the structural section schematic diagram of solar energy heat collection pipe
Fig. 4 is the schematic cross-section of solar energy collector system
Fig. 5 is the schematical top view of thermal-collecting tube
Fig. 6 is another schematic diagram of loop circuit heat pipe solar thermal collector
Reference numeral is as follows:
1 speculum, 2 thermal-collecting tubes, 3 collecting plates, 4 headers, 5 headers, 6 heat collector oral siphons, 7 heat collector outlets, 8 heat collectors, 9 water tanks
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
A solar energy collector system for loop heat pipe type, as shown in Figure 1, comprise solar thermal collector 8 and water tank 9 and loop circuit heat pipe, wherein the evaporator section of loop circuit heat pipe is in heat collector 8, and the condensation segment of loop circuit heat pipe is arranged in water tank 9; Heat collector 8 absorbs the heat of solar energy, enters the condensation segment of loop circuit heat pipe after the water in heat collector evaporates, and condensation segment carries out heat release, the water in heating water tank, and after condensation segment heat release completes, recirculation enters in heat collector and heats.
Fig. 2 illustrates the concrete structure of heat collector 8, as shown in Figure 2, heat collector, comprises thermal-collecting tube 2, speculum 1 and collecting plate 3, connected by collecting plate 3 between two adjacent thermal-collecting tubes 2, thus make to form tube plate structure between multiple thermal-collecting tube 2 and adjacent collecting plate 3; Described solar energy collector system comprises two pieces of tube plate structures, shape a at a certain angle between described two pieces of tube plate structures, as shown in Figure 2, described angle direction is relative with the direction of the circular arc line structural bending of speculum, between the angle a that the focus D of speculum 1 is formed at tube plate structure.
Traditional heat collector is all be set directly in focus by thermal-collecting tube, once position offsets, then heat would not thermal-arrest in thermal-collecting tube, pass through said structure, sunlight, at speculum 1, reflexes to tube plate structure by speculum 1, by heat thermal-arrest in the thermal-collecting tube 2 in tube plate structure.By this structure, even if because to install or operation problem causes tube plate structure position to change, then solar energy still can thermal-arrest in thermal-collecting tube 2, thus avoid thermal loss; Simultaneously because traditional heat collector is all be set directly in focus by thermal-collecting tube, cause thermal-collecting tube hot-spot, cause thermal-collecting tube local losses excessive, life-span is too short, even cause thermal-collecting tube over-heat inside, produce superheated steam, be full of whole thermal-collecting tube, cause thermal-collecting tube internal pressure excessive, damage thermal-collecting tube, and take the structure of the application, both heat can be absorbed fully, and can, by dispersion relative for heat, avoid heat too concentrated again, make overall thermal-collecting tube absorb heat evenly, extend the service life of thermal-collecting tube.
As one preferably, the focus D of speculum 1 is positioned on the mid point of two pieces of tube plate structure least significant end lines.By above-mentioned setting, can ensure to absorb solar energy to the full extent, avoid solar energy to lose because of focal shift, can also ensure that platy structure may reduce the sunlight of irradiation on speculum 1 blocked simultaneously as far as possible.Prove by experiment, adopt said structure, the effect of solar absorption is best.
Find in practice, the caliber of thermal-collecting tube 2 can not be excessive, if caliber is excessive, water then in thermal-collecting tube 2 can not heat fully, cause heating effect very poor, otherwise caliber is too small, water then in thermal-collecting tube can be overheated, in like manner, distance between thermal-collecting tube 2 is also met the demands, if the distance between thermal-collecting tube 2 is excessive, the volume of the water then in thermal-collecting tube 2 is too small, water can be caused overheated, equally, if the distance between thermal-collecting tube 2 is too small, then thermal-collecting tube distribution is too close, cause the problem that the water in thermal-collecting tube 2 cannot reach predetermined, or more extra auxiliary heating instrument must be needed, for the length of tube plate structure, also meet certain requirements, if tube plate structure is oversize, then can shelter from the too much sunlight being irradiated to speculum 1, the heat causing heat collector to absorb sunlight reduces, cause and reach desirable heating state, if the length of tube plate structure is too small, then causes too much solar energy heating on the thermal-collecting tube of small size, cause thermal-collecting tube to be heated concentrated, but also the solar energy of a part of thermal-arrest can be caused directly not have thermal-arrest in thermal-collecting tube, but directly reflex to outside, for angle a, same principle, if angle is excessive, then portion launches excessive to area on the mirror, then can shelter from the too much sunlight being irradiated to speculum 1, if angle area is too small, then the solar energy that there will be a part of thermal-arrest does not directly have thermal-arrest in thermal-collecting tube, but directly reflex to outside, cause the loss of heat.Therefore following relation is met for the angle between the distance between the length of tube plate structure, thermal-collecting tube internal diameter, thermal-collecting tube, tube plate structure, circular arc line radius:
The circular arc line radius of speculum is R, and the length of every block tube plate structure is R1, and the radius of thermal-collecting tube is R2, and on same tube plate structure, the distance in the center of circle of Neighbor Set heat pipe is L, and the angle between two pieces of tube sheets is a, then meet following formula:
R1/R＝c*sin(a/2)
b，
0.18<R2/L<0.34，
Wherein c, b are coefficient, 0.39<c<0.41,0.020<b<0.035;
0.38<R1/R<0.41，80°<＝A<＝150°，450mm<R1<750mm,1100mm<R<1800mm,
90mm<L<150mm,20mm<＝R2<50mm。
As preferably, c=0.4002, b=0.0275.
As preferably, along with the increase of angle a, the coefficient of c, b becomes large gradually.So more meet the needs of real work.
As preferably, the lower wall surface (face relative with speculum 1) of tube plate structure is arranged the projection being used for augmentation of heat transfer, to strengthen the absorption to solar energy.Along the middle part (i.e. extreme higher position) of tube plate structure on both sides extreme lower position (namely Fig. 1 thermal-collecting tube A is to B, C direction) bearing of trend, the height of projection of the lower wall surface of thermal-collecting tube is more and more higher.Find in an experiment, extend from middle part to both sides, caloric receptivity raises gradually, being because there is the stop of tube plate structure, causing middle part to be heated minimum, and extending from middle part to both sides, absorbing heat and raise gradually by analyzing main cause.By the continuous rising of height of projection, being heated evenly of water in whole thermal-collecting tube can be made, avoid that both sides temperature is too high and medium 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 along the link position (i.e. the middle part of tube plate structure) of two pieces of tube plate structures to both sides (namely Fig. 1 thermal-collecting tube A is to B, C direction), the density of protrusions of the lower wall surface of thermal-collecting tube is more and more higher.Main cause is heated minimum in the middle part of being, and extends from middle part to both sides, absorbs heat and raises gradually.By the continuous rising of density of protrusions, being heated evenly of water in whole thermal-collecting tube can be made, avoid that medium temperature is too low and both sides temperature is too high.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, the inwall of thermal-collecting tube 2 can arrange fin, such as straight fins or helical fin can be set, the interior fin height of different thermal-collecting tube is different, extend along the link position (i.e. the middle part of tube plate structure) of two pieces of tube plate structures to both sides (namely Fig. 1 thermal-collecting tube A is to B, C direction), the height of fin reduces gradually.Main cause is identical with arranging protruding reason above.
Tube plate structure surface application heat-sink shell, described heat-sink shell outwards comprises transition zone, infrared reflection coating, heat absorbing coating, antireflection coatings and protective layer successively in tube plate structure, wherein transition zone, infrared reflection coating, heat absorbing coating, antireflection coatings and protective layer thickness be 0.03um, 0.23um, 0.77um, 0.15um, 0.12um respectively; Described transition zone is the transition zone of the compound by MF reactive magnetron sputtering method plated metal Al, Si and N formation; Described infrared reflection coating is from inside to outside W, Cr, Ag tri-layers, and the thickness proportion of three layers is 9:4:7; Heat absorbing coating from inside to outside comprises Cr, Nb, Zr, NbN, Cr successively
2o
3five layers, the thickness proportion of three layers is 9:7:4:4:5; Antireflection coatings is from inside to outside AlN, TiO successively
2, Nb
2o
5, Al
2o
3, and Si
3n
4five layers, wherein the thickness proportion of five layers is 3:6:8:9:2; The composition of protective layer is identical with transition zone.
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 0.945, and to realize the low-launch-rate of less than 0.042.
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.
For the concrete structure of heat collector, shown in Figure 5, described heat collector comprises header 4,5, and thermal-collecting tube 2 connects two headers 4,5.Certainly, the shape of header should as shown in Figure 1, and at an angle at middle part, corresponding with the thermal-collecting tube in Fig. 1, Fig. 5 does not show, is only schematic diagram.Described header 4 is arranged in heat collector oral siphon 5, header 5 and heater outlet pipe 6 is set.As preferably, heat collector oral siphon 5 and heat collector outlet pipe 6 are arranged on the highest position of top A, can ensure that water in header is from the flowing of top lower portion, ensures the uniform distribution of water like this.Otherwise the moisture dosage in upper-part centralized heat pipe very little, causes hot-spot.
Fig. 6 illustrates the loop circuit heat pipe solar energy collector system adopting Fig. 5 heat collector.
As preferably, only arrange heat-sink shell in the bottom of tube plate structure, for the top of tube sheet mechanism, arrange solar panel, like this, can realize a part of heat being used for generating, a part of heat is used for heating, realizes the dual needs adding heat and generating power.
As preferably, the material of the thermal-collecting tube of heat collector is albronze, and the mass percent of the component of described albronze is as follows: 3.9%Cr, 3.6%Ag, 2.6%Mn, 3.25%Zr, 2.3%Ce, 1.5%Ti, 2.36%Si, all the other are Cu, Al, and the ratio of Cu, Al is 3.23:2.18.
The manufacture method of albronze is: adopt vacuum metallurgy melting, and argon for protecting pouring becomes circle base, through 800 DEG C of Homogenization Treatments, at 630 DEG C, adopts and is hot extruded into bar, and then after 556 DEG C of solution hardening, carry out artificial aging process at 220 DEG C.The tensile strength of alloy: room temperature >=540MPa, 200 DEG C >=420MPa, 300 DEG C >=-250MPa.
After tested, above-mentioned alloy has very high thermal conductivity factor and heat resistance.
As preferably, water tank 9 outer setting heat-insulation layer, described heat-insulation layer comprises vacuum thermal insulation plate, and described vacuum thermal insulation plate comprises core and high-gas resistance composite membrane, by the coated core of mode high-gas resistance composite membrane vacuumized, forms vacuum thermal insulation plate.From the direction that tank outer wall facing epitaxy is stretched, described core at least comprises multilayer inorganic fibre mat, described multilayer inorganic fibre mat is multiple-level stack or is connected by binding agent multilayer, the density of at least two-layer inorganic fibre mat in described multilayer inorganic fibre mat or composition difference.
As preferably, wherein core comprises the internal layer district of the close water tank wall portion covering inorganic fibre mat surface and/or is positioned at the outer layer zone of inorganic fibre mat outside.
As preferably, internal layer district and/or outer layer zone are made up of one or more in aluminosilicate fiberboard, centrifugally glass-wool plate, rock cotton board, textile fabric plate, waste paper pulpboard.
As preferably, the number of plies of inorganic fibre mat is 30-130 layer.More preferably 50-80 layer.
As preferably, the density of inorfil is 10-300kg/m
3.
As preferably, the density of the inorganic fibre mat that arbitrary neighborhood is two-layer or composition are not identical.
As preferably, along inside outward, the density of inorganic fibre mat increases.Prove by experiment, it is better that density increases brought effect of heat insulation successively, can reach the effect of heat insulation comparatively optimized, can improve the effect of heat insulation of about 10%.
As preferably, along inside outward, the amplitude that the density of inorganic fibre mat increases successively is more and more less.Prove by experiment, more and more less the brought effect of heat insulation of increasing degree is better successively for the density of inorganic fibre mat, can reach more excellent effect of heat insulation.
As preferably, the layer that its Midst density is large and the little layer of density are alternately placed.Prove by experiment, it is fine that this kind places effect of heat insulation, can improve the effect of heat insulation of more than 7.3%.As preferably, the density of the layer that density is large is 100-300kg/m
3, the density that density is little is 10-100kg/m
3, select the insulation effect that the density under this condition can reach more excellent.
As preferably, superfine glass cotton fiber plate, bulk density is 10kg/m
3-100kg/m
3, thickness is 1mm-9mm.
Aluminosilicate fiberboard bulk density is 20kg/m
3-200kg/m
3, preferred 50-100m
3, thickness is 1mm-9mm.
Centrifugally glass-wool plate bulk density is 20kg/m
3-150kg/m
3, preferred 50-100m
3, thickness is 2mm-25mm.
Rock cotton board bulk density is 30kg/m3-200kg/m
3, preferred 70-130m
3, thickness is 3mm-35mm.
As preferably, described inorganic fibre mat is microglass fiber plate, two or morely in aluminosilicate fiberboard, centrifugally glass-wool plate, rock cotton board, secondary stock, textile fabric plate be arranged alternately.
Be exemplified below:
With thickness 1mm aluminosilicate fiberboard (30kg/m
3) and thickness 3mm aluminosilicate fiberboard (50kg/m
3) be stacked alternately until 1.2cm, obtain core material of vacuum heat insulation plate.
Or with thickness 1mm aluminosilicate fiberboard (100kg/m
3) and thickness 2mm ceramic beaverboard (70kg/m
3) be stacked alternately until 1.5cm, obtain core material of vacuum heat insulation plate.
Or be stacked alternately until 2cm with thickness 1mm aluminosilicate fiberboard and 2mm ceramic beaverboard and 2mm centrifugally glass-wool plate, obtain core material of vacuum heat insulation plate.
Or with 1mm aluminosilicate fiberboard and 3mm ceramic beaverboard, 2mm rock cotton board is stacked alternately until 3cm, obtains core material of vacuum heat insulation plate.
Or with 1mm aluminosilicate fiberboard and 3mm ceramic beaverboard, 3mm centrifugally glass-wool plate, 3mm rock cotton board is stacked alternately until 3cm, obtains core material of vacuum heat insulation plate.
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 (3)
1. a loop circuit heat pipe solar energy collector system, comprises solar thermal collector, water tank and loop circuit heat pipe, and wherein the evaporator section of loop circuit heat pipe is heat collector, and the condensation segment of loop circuit heat pipe is arranged in water tank; Heat collector absorbs the heat of solar energy, and enter the condensation segment of loop circuit heat pipe after the water in heat collector evaporates, condensation segment carries out heat release, the water in heating water tank, and after condensation segment heat release completes, recirculation enters in heat collector and heats; Heat collector comprises thermal-collecting tube, speculum and collecting plate, is connected between two adjacent thermal-collecting tubes by collecting plate, thus makes to form tube plate structure between multiple thermal-collecting tube and adjacent collecting plate; Described tube plate structure is two pieces; Between two pieces of tube plate structures, shape is at a certain angle, and described angle direction is relative with the circular arc line structure of speculum, between the angle that the focus of speculum is formed at tube plate structure;
The focus of speculum is positioned on the mid point of two pieces of tube plate structure least significant end lines;
The circular arc line radius of speculum is R, and the length of every block tube plate structure is R1, and the radius of thermal-collecting tube is R2, and on same tube plate structure, the distance in the center of circle of Neighbor Set heat pipe is L, and the angle between two pieces of tube plate structures is a, then meet following formula:
R1/R＝c*sin(a/2)
b，
0.18<R2/L<0.34，
Wherein c, b are coefficient, 0.39<c<0.41,0.020<b<0.035;
0.38<R1/R<0.41，80°<＝A<＝150°，450mm<R1<750mm,1100mm<R<1800mm,90mm<L<150mm,20mm<＝R2<50mm。
2. solar energy collector system according to claim 1, is characterized in that, c=0.4002, b=0.0275.
3. solar energy collector system according to claim 1, is characterized in that, along with the increase of angle a, the coefficient of c, b becomes large gradually.
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| CN104266368B (en) * | 2013-10-22 | 2015-08-19 | 山东大学 | A kind of loop heat pipe type solar energy system |
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