CN103090556A - Vacuum flat-plate solar collector and monomer heat absorbers used - Google Patents
Vacuum flat-plate solar collector and monomer heat absorbers used Download PDFInfo
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- CN103090556A CN103090556A CN2013100625573A CN201310062557A CN103090556A CN 103090556 A CN103090556 A CN 103090556A CN 2013100625573 A CN2013100625573 A CN 2013100625573A CN 201310062557 A CN201310062557 A CN 201310062557A CN 103090556 A CN103090556 A CN 103090556A
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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 discloses a vacuum flat-plate solar collector and monomer heat absorbers used. The vacuum flat-plate solar collector and the monomer heat absorbers used comprises a rectangular frame body, a given amount of flat-plate vacuum pipes which are installed in the frame body, corresponding united pipelines and piping. The given amount of flat-plate vacuum pipes are evenly divided into multiple groups, each group forms a monomer heat absorber, and wind gaps are left between the adjacent monomer heat absorbers. The vacuum flat-plate solar collector and the monomer heat absorbers used can reduce wind resistance of the vacuum flat-plate solar collector.
Description
Technical field
The present invention relates to a kind of vacuum panel solar thermal collector, and the monomer heat dump that uses.
Background technology
Flat-plate solar collector is a kind ofly to absorb solar radiation energy and to the device of working medium transferring heat, it is a kind of special heat exchanger, and the working medium in heat collector is carried out heat exchange with the sun at a distance.Flat-plate solar collector generally by frame shell body, be arranged on the transparent cover plate on frame shell body, the heat-absorbing plate core that is positioned at frame shell body, insulation material and relevant parts and form.At the adjunction circulating line, after attemperater, namely become and can absorb solar radiant heat, water temperature is raise.
The basic functional principle of flat-plate solar collector is very simple.Put it briefly, sunlight sees through transparent cover plate and shines on the absorber that the surface scribbles absorbed layer, and wherein most of solar radiant energy is absorbed by absorber, changes heat energy into, and the working medium of biography in the fluid passage.Like this, the cold working medium from the heat collector bottom inlet is heated by sun the subject of knowledge and the object of knowledge in the fluid passage, and temperature raises gradually, and the hot working fluid after heating from the outlet of the upper end of heat collector, holds in water storage tank stand-byly with useful heat energy, is the useful energy income.Meanwhile, because the absorber temperature raises, to the environment dissipated heat, consist of the various heat loss of flat plate collector by transparent cover plate and shell.
Flat plate collector has been widely used in the numerous areas such as domestic water heating, natatorium heating system, water for industrial use heating, constructure heating and air-conditioning.Flat plate collector generally adopts the higher coating for selective absorption of absorptivity or black chromium etc., but owing to there is no vacuum structure, cross-ventilation and conductive heat loss are large, and only adopt the insulation material insulation, the easy moisture absorption of material, performance is unsatisfactory, has caused heat loss larger, and temperature is higher, and is more obvious than the hydraulic performance decline of conventional vacuum tubular type heat collector.
Existing solar thermal collector mostly is electron tubes type both at home and abroad, in identical gross collector area situation, the absorber area of flat plate collector is larger than the absorber area of vacuum tube collector, that the interval arranges in heat collector due to vacuum tube, the endotherm area of vacuum tube only accounts for 0.5 ~ 0.6 left and right of solar thermal collector surface area, because the endotherm area of vacuum tube is less, cause at the thermal efficiency ratio flat plate collector of low-temperature zone solar thermal collector low.
And mostly the absorber of flat-plate solar collector is absorber plate, and absorber plate is to absorb solar radiant energy in flat-plate solar collector and to the parts of heat-transfer working medium transferring heat, it is writing board shape basically.
On the absorber plate of writing board shape, usually all be furnished with comb and collector.Comb refers to the absorber plate longitudinal arrangement and consists of the parts of fluid passage; Collector refers to the horizontal parts that connect some combs and consist of the fluid passage in two ends, absorber plate up and down.Structure difference by absorber plate can be categorized as: tube-sheet type, wing pipe type, coil pipe type, flat box type, circular pipe type and heat pipe-type.It finally all can be spliced into plate the absorber plate of which kind of structure, then to coordinate the parts of other flat-plate solar collector be totally enclosed in the normal direction of absorber plate, and windage is larger, and the mounting structure of flat solar machine is had higher requirement.
As for aforesaid heat pipe, also can become thermal-collecting tube, adopt in some applications the flat-plate solar collector of vacuum heat collection pipe also to exist, but be subject to the design feature of flat-plate solar collector, the gap on the ordinary vacuum tube heat collector between thermal-collecting tube is also by whole cover closure.
From above content as can be known, be subject to the design feature of current flat-plate solar collector, the windage of current flat-plate solar collector is larger.
Summary of the invention
The technical problem that the present invention overcomes the first level is to reduce the windage of vacuum panel solar thermal collector, thereby points out a kind of vacuum panel solar thermal collector and monomer heat dump used.
The present invention is by the following technical solutions:
A kind of vacuum panel solar thermal collector, comprise the framework of rectangle and be arranged on the interior planar vacuum pipe to determined number of this framework, and corresponding union pipe road and pipe arrangement, be divided into many groups for the described planar vacuum pipe of determined number, every group forms a monomer heat dump, leaves wind gap between the adjacent monomer heat dump.
Can find out from above scheme, according to the present invention, no longer adopt the ordinary flat solar thermal collector in the complete totally enclosed structure of dull and stereotyped plate face direction, and the hot device of the play of adopting some monomers is replaced the heat dump of original integral body, leave wind gap between adjacent monomer heat dump, thereby effectively reduce the windage of flat-plate solar collector.On the other hand, this structure seems the cost of manufacture that has significantly improved flat plate collector, in fact be understandable that, the current flat-plate solar collector that has the vacuum pipe heat-collecting pipe formula, it also contains the vacuum pipe heat-collecting pipe of monomer, whole cost of manufacture is also very high, if industrialization monomer heat dump just can effectively reduce costs.
Above-mentioned vacuum panel solar thermal collector, the cross section of described monomer heat dump are isosceles trapezoid, adjacent monomer heat dump complementary configured, and the crack that adjacent two waist shoulders form is described wind gap;
Correspondingly, above the heat-absorbing plate core of a pair of monomer heat dump of complementary configured, for containing the cover glass tube of vacuum interlayer, downside is pasted with runner.
Above-mentioned vacuum panel solar thermal collector, heat-absorbing plate core between neutrality line and at large the end.
Above-mentioned vacuum panel solar thermal collector, heat-absorbing plate core be positioned near the large end apart from ∈ [1/4h, 1/3h], wherein h is the height of described isosceles trapezoid.
Above-mentioned vacuum panel solar thermal collector, the sunny slope of described heat-absorbing plate core is provided with absorber coatings, and is provided with anti-reflection layer in the monomer heat dump inboard of going to the bottom.
Above-mentioned vacuum panel solar thermal collector, each monomer heat dump disposes a dull and stereotyped vacuum tube.
Above-mentioned vacuum panel solar thermal collector, the acute angle ∈ in the interior angle of described isosceles trapezoid [45 °, 80 °].
In addition corresponding, a kind of monomer heat dump, the heat absorbing units as vacuum panel solar thermal collector of a plurality of one group, it is characterized in that, at least be provided with and contain the cover glass tube that vacuum adds layer, be configured in the runner accommodating chamber of cover glass tube downside, wherein six road accommodating chamber sides of cover glass tube are provided with runner.
Above-mentioned monomer heat dump, its cross section are isosceles trapezoid.
Description of drawings
Fig. 1 is the plan structure schematic diagram according to a kind of vacuum panel solar thermal collector of the present invention.
Fig. 2 is the middle section figure corresponding to Fig. 1.
In figure, 1, the heat collector body, 2, the planar vacuum pipe, 3, cover glass tube, 4, vacuum interlayer, 5, runner, 6, heat-absorbing plate core, 7, crack, 8, frame, 9, anti-reflection layer.
The specific embodiment
With reference to Figure of description 2, be the structural representation of the middle section of Fig. 1, be analogous to the ordinary flat solar thermal collector, have the frame 8 of rectangle; Should be appreciated that the rectangle here should know the frame shape under as shown in Figure 1 the state of overlooking.
The general structure of frame 8 coupling heat collectors is divided into head end and tail end, and head end is provided with union pipe and insulation material and shell, the both sides pipe arrangement, rear generally is provided with tailstock, and planar vacuum pipe 2 is formed two end supports, and the following lines that frame as shown in Figure 2 is corresponding represent upper and lower side frame.
Frame adopts aluminium section bar, is made into rectangle frame, and aluminium section bar is provided with the heat insulating block that the high temperature material is made, and forms the insulation frame.
Even if current common vacuum tube solar heating element has been also totally enclosed, and in order to maintain easily, mostly also all is furnished with the glass cover-plate that covers whole framework on the array surface of vacuum heat collection pipe.Accordingly as can be known, there is not the version of minimizing windage as shown in Figure 2 in current all types of vacuum tube solar heating element.
In structure as illustrated in fig. 1 and 2, a kind of vacuum panel solar thermal collector comprises the framework of rectangle and is arranged on the interior planar vacuum pipe 2 to determined number of this framework, and corresponding union pipe road and pipe arrangement.
About described quantity and heat utilization give heat relevant with cost control, related with this paper not quite, do not repeat them here.
In above structure, be divided into many groups for the described planar vacuum pipe of determined number, improve uniformity, to facilitate industrialization.Every group forms a monomer heat dump, leaves wind gap between the adjacent monomer heat dump.
The monomer heat dump is different from whole heat dump, thereby makes its characteristics with flexible arrangement, obviously, has and leaves wind gap between the adjacent monomer heat dump precondition is provided.
Therefore, further configure corresponding wind gap.
Wind gap plays the connection effect, and the air channel is more short in theory more is conducive to reduce windage, but can affect effective endotherm area, does not obviously also get rid of the monomer heat dump of square-section here.
Wind gap is conducive to improve the stability of vacuum panel solar thermal collector when reducing windage, what the load that makes blast produce was more uniform is loaded on the support that supports heat collector.
Usually wind gap shared gross area on dull and stereotyped plate face is not more than 1/20 of the plate face gross area, and is not less than 1/40 of the plate face gross area, reduces as much as possible must affect effective endotherm area when reducing windage.
Flat plate collector will keep the sunny slope of opposed flattened, for this reason, the monomer heat dump adopts the shape of rule relatively, rectangle or trapezium structure are adopted in its cross section, rectangular configuration inevitably can reduce effective endotherm area, for this reason, and preferred trapezium structure, in the situation that reduce windage, can not reduce effective endotherm area.
Therefore, the cross section of described monomer heat dump is elected isosceles trapezoid as, and then, the coupling trapezium structure, known, three-dimensional-structure is based on two interior angle complementations of same waist, when two equiform trapezoidal pairings are used so, the part that waist is identical is docked, and namely forms the structure of adjacent monomer heat dump complementary configured, thereby the crack that adjacent two waists shoulders form is described wind gap.
Has more clearly structure indication as Fig. 2, as shown in Figure 2, adjacent monomer heat dump of two planar vacuum pipe 2(contains the one flat plate vacuum tube) between, formation slab construction that can be complementary, heat-absorbing plate core 6 can be placed on different planes, thereby form the coincident configurations of heat-absorbing plate core 6, when sunlight is injected from different directions, greatly reduce the energy loss that causes because of clearance issues, had the even higher daylighting ability identical with the ordinary flat heat collector.
Thereby can allow 2 of planar vacuum pipes to have the gap in above structure, windage will be reduced in this gap, guarantee the operation stability of strong wind weather; The larger atmospheric pressure effect of surface existence due to glass-vacuum tube in the situation that the width of pipe is larger, can increase the multi-point support structure between top and bottom.
Should be appreciated that isosceles trapezoid is a kind of preferred structure, also can select the not on-right angle trapezium structure of isosceles, do not affect equally the dull and stereotyped positive blank pipe installation of monomer heat dump on frame 8 in other words.
Correspondingly, heat-absorbing plate core 6 tops of a pair of monomer heat dump of complementary configured are the cover glass tube that contains vacuum interlayer 4, and downside is pasted with runner 5.In structure shown in Figure 2, the total length of heat-absorbing plate core 6 is greater than the total length of integral slab core.
The structure of the monomer heat dump that Fig. 2 more clearly reflects in fact has and elects a monomer heat dump as to the version of a planar vacuum pipe 2 should be arranged, and is convenient to make.Begin to include vacuum and add layer according to cover glass tube 3 is arranged from sunny slope, top layer is cover glass in other words, is then that vacuum adds layer 4, is provided with runner 5 below the bottom of cover glass tube 3.
In order to improve heat absorption efficiency, the cover glass that uses preferably uses high transmission rate, and to enhance the transparency, general transmitance wants 〉=0.91, can apply antireflective coating on the surface of glass, further increases the energy that enters vacuum flat plate collector.
Another program is to add low-emissivity coating in the inboard of cover glass plate (sunny slope), is that to plate at glass surface the film that multiple layer metal or other compounds form be product.This film plating layer has the characteristic to visible light high transmission and the high reflection of centering far infrared, can reduce by radiation and cause energy loss, improves vacuum flat plate collector at the collecting efficiency of high temperature section.On the surface of (opaco) that cover glass plate, being preferably inner surface increases the low emission coating of one deck, usually can use copper film or aluminium film, can further reduce emissivity, increases the efficient of vacuum flat plate collector in addition.
Described vacuum interlayer after metal end and cover glass sealing, vacuumizes and forms.Can be also non-matching for the sealing-in of coupling, and draw intake-outlet in end caps.Vacuum interlayer has higher vacuum, can effectively reduce the thermal loss that causes because of cross-ventilation.Compare with the ordinary flat heat collector, can reduce the use of the insulation material in the thermal-arrest zone, thereby can reduce the thickness of heat collector, the consumption of opposite side frame material and insulation material will reduce.
Metal end and glass sealing can be ends, also can all adopt glass-to-metal sealing in two ends.Runner is used for taking the heat that absorber plate absorbs out of the planar vacuum pipe, and when only an end adopted glass-to-metal sealing, the other end can be the sealing by fusing of glass of the same race, and its runner form is used U-shaped connection, derives from same metal end; When all adopting glass-to-metal sealing at two ends, runner is bypass structure, namely enters from one deck, after heating up, derives from opposite side.
Described absorber plate is selected the coating for selective absorption of sunlight spectrum of magnetron sputtering, solar spectrum is had stronger absorption, and transmitting ratio is low.
In order to improve the gross area of heat-absorbing plate core 6, heat-absorbing plate core 6 between the neutrality line of planar vacuum pipe 2 and at large the end.Neutrality line is mathematical term, i.e. the line of trapezoidal two waist mid points is parallel to and goes to the bottom on trapezoidal.
Preferably, heat-absorbing plate core be positioned near the large end apart from ∈ [1/4h, 1/3h], wherein h is the height of described isosceles trapezoid, makes adjacent heat-absorbing plate core 6 have larger registration.The closer to the large end, the area of heat-absorbing plate core 6 will be larger, but during complementary configured, adjacent planar vacuum pipe 2 can adopt the larger negative effect of generation to it, therefore, had better not too near the large end, be limited with 1/4h.
Acute angle ∈ in the interior angle of described isosceles trapezoid [25 °, 80 °].Because the waist gradient of the isosceles trapezoid difficulty of more producing extensively is larger, and be unfavorable for branched planar vacuum pipe 2 along this configuration, therefore, control described acute angle and be not less than 25 °.For the design of maximum acute angle, need to consider the width of crack 7, and heat-absorbing plate core can draw through simple inference to the distance of going to the bottom, its design focal point can make the large end long in minimum of a value less than 25 degree, is difficult to processing structure matching relation.
Claims (9)
1. vacuum panel solar thermal collector, comprise the framework of rectangle and be arranged on the interior planar vacuum pipe to determined number of this framework, and corresponding union pipe road and pipe arrangement, it is characterized in that, be divided into many groups for the described planar vacuum pipe of determined number, every group forms a monomer heat dump, leaves wind gap between the adjacent monomer heat dump.
2. vacuum panel solar thermal collector according to claim 1, is characterized in that, the cross section of described monomer heat dump is isosceles trapezoid, adjacent monomer heat dump complementary configured, and the crack that adjacent two waist shoulders form is described wind gap;
Correspondingly, above the heat-absorbing plate core of a pair of monomer heat dump of complementary configured, for containing the cover glass tube of vacuum interlayer, downside is pasted with runner.
3. vacuum panel solar thermal collector according to claim 2, is characterized in that, heat-absorbing plate core between neutrality line and at large the end.
4. vacuum panel solar thermal collector according to claim 3, is characterized in that, heat-absorbing plate core be positioned near the large end apart from ∈ [1/4h, 1/3h], wherein h is the height of described isosceles trapezoid.
According to claim 2 to 4 arbitrary described vacuum panel solar thermal collector, it is characterized in that, the sunny slope of described heat-absorbing plate core is provided with absorber coatings, and is provided with anti-reflection layer in the monomer heat dump inboard of going to the bottom.
According to claim 2 to 4 arbitrary described vacuum panel solar thermal collector, it is characterized in that, each monomer heat dump disposes a dull and stereotyped vacuum tube.
According to claim 2 to 4 arbitrary described vacuum panel solar thermal collector, it is characterized in that the acute angle ∈ in the interior angle of described isosceles trapezoid [25 °, 80 °].
8. monomer heat dump, the heat absorbing units as vacuum panel solar thermal collector of a plurality of one group is characterized in that, is provided with at least to contain the cover glass tube that vacuum adds layer, be configured in the runner accommodating chamber of cover glass tube downside, wherein six road accommodating chamber sides of cover glass tube are provided with runner.
9. monomer heat dump according to claim 8, is characterized in that, its cross section is isosceles trapezoid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310062557.3A CN103090556B (en) | 2013-02-28 | 2013-02-28 | Vacuum flat-plate solar collector and monomer heat absorbers used |
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| CN201310062557.3A CN103090556B (en) | 2013-02-28 | 2013-02-28 | Vacuum flat-plate solar collector and monomer heat absorbers used |
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| CN103090556B CN103090556B (en) | 2014-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650898A (en) * | 2016-01-04 | 2016-06-08 | 海宁宝光太阳能工业有限公司 | Vacuum tube type solar heat collector without horizontal plate |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2602320Y (en) * | 2003-03-03 | 2004-02-04 | 唐健正 | Vacuum glass solar collector plate glass heat collection device |
| US20060124276A1 (en) * | 2003-02-05 | 2006-06-15 | Curtis Paul F | Solar energy system |
| CN201463325U (en) * | 2009-06-02 | 2010-05-12 | 吴顺海 | Flat plate type solar vacuum collector |
| CN102177591A (en) * | 2008-09-04 | 2011-09-07 | 摩根阳光公司 | Staggered light collectors for concentrator solar panels |
| CN203163288U (en) * | 2013-02-28 | 2013-08-28 | 山东力诺新材料有限公司 | Vacuum flat-plate solar collector and single heat absorber for same |
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2013
- 2013-02-28 CN CN201310062557.3A patent/CN103090556B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060124276A1 (en) * | 2003-02-05 | 2006-06-15 | Curtis Paul F | Solar energy system |
| CN2602320Y (en) * | 2003-03-03 | 2004-02-04 | 唐健正 | Vacuum glass solar collector plate glass heat collection device |
| CN102177591A (en) * | 2008-09-04 | 2011-09-07 | 摩根阳光公司 | Staggered light collectors for concentrator solar panels |
| CN201463325U (en) * | 2009-06-02 | 2010-05-12 | 吴顺海 | Flat plate type solar vacuum collector |
| CN203163288U (en) * | 2013-02-28 | 2013-08-28 | 山东力诺新材料有限公司 | Vacuum flat-plate solar collector and single heat absorber for same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105650898A (en) * | 2016-01-04 | 2016-06-08 | 海宁宝光太阳能工业有限公司 | Vacuum tube type solar heat collector without horizontal plate |
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Granted publication date: 20141224 Termination date: 20160228 |