CN102927709A - Self-condensation all-glass vacuum solar collecting pipe - Google Patents
Self-condensation all-glass vacuum solar collecting pipe Download PDFInfo
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- CN102927709A CN102927709A CN2012104800740A CN201210480074A CN102927709A CN 102927709 A CN102927709 A CN 102927709A CN 2012104800740 A CN2012104800740 A CN 2012104800740A CN 201210480074 A CN201210480074 A CN 201210480074A CN 102927709 A CN102927709 A CN 102927709A
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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
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Abstract
A self-condensation all-glass vacuum solar collecting pipe belongs to the field of solar thermal utilization devices, is provided with basic components of a solar collecting pipe, and is characterized in that an upper half side pipe wall of a glass shielding tube (1) adopts a structure of a condensing lens (7) and/or the outer surface of a lower half side pipe wall is coated with a concave reflecting mirror plane (8) formed by a metallic membrane and capable of condensation, and condensation focal lines are all projected on a high-temperature resistant selective heat absorption membrane (3) of an inner glass tube (2); the condensing lens (7) is a biconvex lens (9) or a tubular Fresnel lens (10); meanwhile, the external diameter of the glass shielding tube (1) is abnormally larger than that of the inner glass tube (2). The invention has the advantages that the self-condensation all-glass vacuum solar collecting pipe has high lighting energy density, quick temperature rise of working medium and high temperature reaching the moderate-temperature range, can be widely applied to a plurality of fields, adopts the structure that the condensing mirror and the all-glass vacuum tube body are integrated, has simple structure, little possibility of exposing the reflecting mirror plane, low cost, compatibility, and strong expansibility, occupies less area, is easy to manufacture and maintain, and is suitable for mass production.
Description
Technical field
The invention belongs to the helioplant field, relate to a kind of Self-concentration full-glass solar energy collecting vacuum tube, be specially adapted to middle temperature solar heat utilization.
Background technology
In the middle high-temperature solar thermal-collecting tube device that is applicable to heating power, thermoelectric engineering of present domestic research and development, all adopt the optically focused mode obtain in heat of high temperature, its optically focused mode has two kinds substantially, a kind of is outer light collecting, a kind of is interior light collecting.
In the outer concentrating solar thermal-collecting tube device, adopt the paraboloid trough type reflective mirror, the through type metal-glass vaccum heat-collecting tube is installed in focal line position at the paraboloid trough type reflective mirror, increases the solar irradiation energy density, improves the temperature of metal-glass vaccum heat-collecting tube.The advantage of outer concentrating solar thermal-collecting tube device is; the condenser daylighting area is large; optically focused is than high; can gather the large heat of high temperature; be at present and in the future one period solar thermal power generation and the main flow equipment of high temperature heat enginnering; its weak point is; condenser and vacuum heat collection pipe split; the manufacturing technology more complicated of metal-glass vaccum heat-collecting tube, the manufacturing equipment investment is large, and production cost is higher; heat collector single unit system engineering developed area is large; and the paraboloid trough type reflective mirror also need be equipped with from motion tracking daylight tumbler, moreover, since the reflective mirror of condenser all exposed in the open air; the wind and weather Exposure to Sunlight; therefore, the wind resistance anti-corrosion performance requires high, and the maintenance work amount of reflective mirror is larger; working life is shorter; therefore; it relatively is applicable to centralized scale thermal power generation project, is not suitable for the distributed public heat enginnering in the tight slightly city of land used, especially is not suitable for small-sized heat enginnering.
Interior converging vacuum glass soalr energy heat-collecting pipe, a kind of is that the metal curved surface reflector is installed in the vacuum chamber of all-glass vacuum tube, form mirror surface, sunlight is focused on the absorption film of inner glass tube by it, a kind of is AM aluminum metallization film on the inner surface of axial second side pipe wall of the cover glass tube of all-glass vacuum tube, form the concave reflection minute surface, sunlight is focused on the absorption film of inner glass tube by it, thereby improve the endothermic temperature of all-glass vacuum tube, the light collecting solar energy metric density that can both effectively improve all-glass vacuum tube in above two kinds can collect the heat energy of higher temperature; Interior converging vacuum glass soalr energy heat-collecting pipe belongs to middle temperature thermal-collecting tube, be suitable for small-sized heat enginnering, single unit system takes up room little, mirror surface is outer the exposure not, easy care, and its weak point is, in front a kind of structure, the metal curved surface reflector need consume a large amount of mirror face stainless steel plates, so that the production cost is high, in the vacuum chamber of aspect all-glass vacuum tube the metal curved surface reflector is installed in addition, can affect the long-term maintenance of vacuum quality, increase heat waste, thereby make the solar collecting performance of all-glass vacuum tube accelerate decline, in rear a kind of structure, AM aluminum metallization membrane process difficulty is large, need special-purpose filming equipment and frock, investment is large, and production cost is higher.
Summary of the invention
The technical problem that solves:
A kind of Self-concentration full-glass solar energy collecting vacuum tube is provided, belongs to middle temperature thermal-collecting tube, condenser and all-glass vacuum tube body are united two into one.Utilize the characteristics of glass itself, geometry and/or the surface texture of the cover glass tube by changing all-glass vacuum tube, make glass form collector lens and/or the speculum of energy optically focused from body, strengthen simultaneously the ratio of the diameter of the diameter of cover glass of all-glass vacuum tube and inner glass tube, can overcome the deficiencies in the prior art, can improve significantly the solar irradiation energy density of the absorption film on the inner glass tube, realize that temperature is utilized in the solar energy, and easily make, production cost is low, is convenient to industrialization production, simultaneously, system compatibility, autgmentability is strong, is convenient to wide popularization and application.
The technical scheme that adopts:
A kind of Self-concentration full-glass solar energy collecting vacuum tube, comprise the inner glass tube, vacuum chamber, support and the getter that are coated with high temperature resistant selective heat-absorbing film on the cover glass tube, outer surface of all-glass vacuum tube, it is characterized in that: axial first side pipe wall of cover glass tube be coated with on the outer surface of axial second side pipe wall of structure with collector lens and/or cover glass tube by metal film consist of can optically focused the concave reflection minute surface; Collector lens can be with the sunshine transmission focusing, and the focal line after the focusing is incident upon on the described high temperature resistant selective heat-absorbing film, and the concave reflection minute surface can be with the sunshine reflect focalization, and the focal line after the focusing is incident upon on the described high temperature resistant selective heat-absorbing film;
Described collector lens is the circumferential symmetrical convex of the inwall of a cover glass tube, and axially extended biconvex lens, perhaps is a circumferentially symmetry, and axially extended tubulose Fresnel Lenses.
Beneficial effect:
In the combined light gathering type structure of the present invention, on axial first side pipe wall of cover glass tube is the outer surface of axial second side pipe wall of concentrator lens structure and cover glass tube, be coated with by metal film consist of can optically focused the concave reflection minute surface time, sunshine sees through on the high temperature resistant selective heat-absorbing film on first side external surface that collector lens focuses on inner glass tube, the sunshine of not intercepted and captured by inner glass tube is focused on by the metal concave reflecting mirror face on the high temperature resistant selective heat-absorbing film on second side external surface of inner glass tube, again since the external diameter of cover glass tube much larger than the diameter of inner glass tube, therefore, dual optically focused interaction energy makes high temperature resistant selective heat-absorbing film obtain the light intensity that is multiplied; Also have following two kinds of light-focusing type structures among the present invention, the lens light gathering type, namely only there is axial first side pipe wall of cover glass tube to be concentrator lens structure, or reflective collection-type, namely only have be coated with on the outer surface of axial second side pipe wall of cover glass tube by metal film consist of can optically focused concave reflection minute surface structure, the two is incident upon the optically focused focal line on the described high temperature resistant selective heat-absorbing film respectively, can make respectively high temperature resistant selective heat-absorbing film obtain large light intensity; The Self-concentration full-glass solar energy collecting vacuum tube that described three kinds of light-focusing type structures consist of all can improve the solar irradiation energy density of high temperature resistant selective heat-absorbing film more significantly, the heat-conducting work medium temperature rise is fast, temperature is high, can reach middle temperature thermal-collecting tube category, the deep fat of warm category or hot water, steam, the heated dry air of higher temperature in being produced by the solar energy heat collector of its assembling, can be applicable to the numerous areas such as heating, air-conditioning, distillation, drying, desalinization, textile printing and dyeing, take up room little, mirror surface is not outer to expose easy care; Condenser and all-glass vacuum tube body unite two into one, and simple in structure, easy making, production cost are low, have than high performance-price ratio, and product systems compatibility, autgmentability are strong, and good economy performance is suitable for large-scale production.
Description of drawings
Fig. 1, the whole structural representation that forms of combined light gathering type;
Fig. 2, press A-A section () figure shown in Fig. 1;
Fig. 3, press A-A section (two) figure shown in Fig. 1;
Fig. 4, convex lens cover glass tube formula longitudinal section view;
Fig. 5, Fresnel Lenses cover glass tube formula longitudinal section view;
Fig. 6, round concave mirror visor tubular type longitudinal section view;
Fig. 7, CPC composite parabolic type concave mirror face shield glass-tube formula longitudinal section view;
Fig. 8, symmetrical parabolic shape concave mirror face shield glass-tube formula longitudinal section view.
The specific embodiment
By reference to the accompanying drawings further in detail explanation:
Shown in Fig. 1～3, combined light gathering type Self-concentration full-glass solar energy collecting vacuum tube comprises the inner glass tube 2, vacuum chamber 4, support 5 and the getter 6 that are coated with high temperature resistant selective heat-absorbing film 3 on the cover glass tube 1, outer surface of all-glass vacuum tube; Axial first side pipe wall of cover glass tube 1 is the structure with collector lens 7, simultaneously, applies the concave reflection minute surface 8 of the energy optically focused that is made of metal film on the outer surface of axial second side pipe wall of cover glass tube 1; Collector lens 7 can be with the sunshine transmission focusing, and the focal line after the focusing is incident upon on the described high temperature resistant selective heat-absorbing film 3, and concave reflection minute surface 8 can be with the sunshine reflect focalization, and the focal line after the focusing is incident upon on the described high temperature resistant selective heat-absorbing film 3;
The circumferential symmetrical convex of inwall that described collector lens 7 is a cover glass tube 1, and axially extended biconvex lens 9, the circumferential symmetrical convex of described inwall is to draw to form when making the shell of cover glass tube 1, after perhaps drawing in advance a double convex glass prism, seamlessly fuse again the axial side at cover glass tube 1, the positive camber (radius of curvature R of described biconvex lens 9
1) namely consist of outer surface (radius of curvature R, and R of axial first side pipe wall of cover glass tube 1
1=R), described biconvex lens 9 is R towards the radius of curvature of the negative camber of inner glass tube 2
2, and R
2≤ R sets R
2Reach the thickness of biconvex lens 9, can determine focus, the focal length of biconvex lens 9, select the radius of curvature R of negative camber
2With the thickness of biconvex lens 9, the sunshine after it focuses on is incident upon on the described high temperature resistant selective heat-absorbing film 3; Perhaps described collector lens 7 is a circumferentially symmetry, and axially extended tubulose Fresnel Lenses 10, described tubulose Fresnel Lenses 10 is based on the principle of conventional plane Fresnel condenser, in roughcast Guan Shizuo engrail and the circumferentially combination of the symmetrical axial striped of even number (or claiming even number prismatic convex lens), and the sunshine after it focuses on is incident upon on the described high temperature resistant selective heat-absorbing film 3 axial first side pipe inner wall surface of cover glass tube 1;
Described by metal film consist of can optically focused concave reflection minute surface 8, be on the outer surface of axial second side pipe wall of cover glass tube 1, adopt magnetron sputtering method aluminium coat film, or aluminium-alundum (Al2O3) composite membrane, or the compound film of aluminium-stainless steel and consisting of; Be coated with lighttight weather resistant protection layer 11 on the outer surface of concave reflection minute surface 8, described weather resistant protection layer 11 is white latex, or the coating acrylic resin, or painting, with protection concave reflection minute surface 8 safety and nondestructives.
Shown in Fig. 1,4, collector lens 7 structures are only arranged, and collector lens 7 is biconvex lens 9 type Self-concentration full-glass solar energy collecting vacuum tubes, this moment cover glass tube 1 the outer surface of axial second side pipe wall on because there not being concave reflection minute surface 8, therefore sunshine is not had the reflect focalization effect, this kind structure is the lens light gathering type.
Shown in Fig. 1,5, collector lens 7 structures are only arranged, and collector lens 7 is tubulose Fresnel Lenses 10 type Self-concentration full-glass solar energy collecting vacuum tubes, this moment cover glass tube 1 the outer surface of axial second side pipe wall on because there not being concave reflection minute surface 8, therefore sunshine is not had the reflect focalization effect yet, this kind structure also is the lens light gathering type.
Shown in Fig. 1,6,7,8, only there are concave reflection minute surface 8 structures of the energy optically focused that is consisted of by metal film to consist of the Self-concentration full-glass solar energy collecting vacuum tube, and axial second side pipe wall of the cover glass tube 1 that concave reflection minute surface 8 depends on is arc surface shape (as shown in Figure 6), perhaps being CPC composite parabolic shape (as shown in Figure 7), perhaps is symmetrical paraboloidal (as shown in Figure 8); In this class formation, axial first side pipe wall of cover glass tube 1 is not the structure of collector lens 7, therefore sunshine is not had the transmission focusing effect; This class formation is reflective collection-type.
For the rounded described cover glass tube 1 of integral body, no matter be the lens light gathering type, reflective collection-type, or the combined light gathering type that has concurrently of lens light gathering type and reflective collection-type, the external diameter of its cover glass tube 1 (is selected 58mm, 70mm or 102mm) the unconventional external diameter greater than described inner glass tube 2 (selecting 20mm), the general latter for the former 1/3-1/5 (conventional-be in the common low-temperature solar energy vacuum heat collection pipe, the latter is only little by 10～15mm) than the former, thereby strengthened the daylighting area of solar vacuum heat-collecting pipe, reduce its endotherm area, the endotherm area of less inner glass tube 2, the one, can increase the solar irradiation energy density that described high temperature resistant selective heat-absorbing film 3 is accepted, make the heat-conducting work medium temperature rise in the inner glass tube 2 fast, temperature is high, the 2nd, can reduce the energy emission total amount of described high temperature resistant selective heat-absorbing film 3, thereby reduce the heat loss of vacuum heat collection pipe.
The embodiment of combined light gathering type Self-concentration full-glass solar energy collecting vacuum tube is as follows:
The glass tube material is canopy silex glass 3.3, the external diameter 58mm of cover glass tube 1, uneven thickness one, length 1500mm, the external diameter 20mm of inner glass tube 2, length 1450mm; Axial first side pipe wall of cover glass tube 1 is double convex glass lens type biconvex lens 9, the radius of curvature R of its positive camber
1Identical with the outer curvature radius R of cover glass tube 1, R
1=R=29mm, biconvex lens 9 is towards the radius of curvature R of the negative camber of inner glass tube 2
2=| R
1|=29mm; The thickness of biconvex lens 9 (distance outside optical axis, between interior two curved surfaces) is 10mm, and the focus of biconvex lens 9 is on its optical axis, and the focal line after the focusing is incident upon on the high temperature resistant selective heat-absorbing film 3 of inner glass tube 2; The optically focused ratio is 2.9;
Use magnetron sputtering method aluminium coat-alundum (Al2O3) composite membrane on the outer surface of axial second side pipe wall of cover glass tube 1, consist of concave reflection minute surface 8, its radius of curvature is 29mm, and focal length is 15mm, and the focal line after the focusing is incident upon on the high temperature resistant selective heat-absorbing film 3 of inner glass tube 2; Coating white primer and acrylic resin are as weathering protective layer 11 on the outer surface of concave reflection minute surface 8; The optically focused ratio is 2.9.
Experiment shows: in the present embodiment, the air drying temperature of combined light gathering type Self-concentration full-glass solar energy collecting vacuum tube is higher than 350 ℃, and the conduction oil Temperature of Working in the inner glass tube 2 is higher than 250 ℃; Solar water heater by the Self-concentration full-glass solar energy collecting vacuum tube assembling of inserting defeated thermometal pipe in the inner glass tube 2 or metal heat pipe 12 (as shown in Fig. 1～3), can bring a lot of facilities to hot-water heating system, such as effectively improving the thermosyphon circulation function, heat collector and heat storage water tank potential difference 5m, need not to install water pump, can realize the heating power automatic cycle, the heat-conducting work medium bearing operation.
For described reflective collection-type Self-concentration full-glass solar energy collecting vacuum tube, its described inner glass tube 2 all place the axis that departs from described cover glass tube 1 under on the position, to obtain the best set thermal effect.
Claims (9)
1. Self-concentration full-glass solar energy collecting vacuum tube, comprise the inner glass tube, vacuum chamber, support and the getter that are coated with high temperature resistant selective heat-absorbing film on the cover glass tube, outer surface of all-glass vacuum tube, it is characterized in that: axial first side pipe wall of cover glass tube be coated with on the outer surface of axial second side pipe wall of structure with collector lens and/or cover glass tube by metal film consist of can optically focused the concave reflection minute surface; Collector lens can be with the sunshine transmission focusing, and the focal line after the focusing is incident upon on the described high temperature resistant selective heat-absorbing film, and the concave reflection minute surface can be with the sunshine reflect focalization, and the focal line after the focusing is incident upon on the described high temperature resistant selective heat-absorbing film;
Described collector lens is the circumferential symmetrical convex of the inwall of a cover glass tube, and axially extended biconvex lens, perhaps is a circumferentially symmetry, and axially extended tubulose Fresnel Lenses.
2. a kind of Self-concentration full-glass solar energy collecting vacuum tube according to claim 1, it is characterized in that: described by metal film consist of can optically focused concave reflection minute surface (8), on the outer surface of axial second side pipe wall of cover glass tube (1), adopt magnetron sputtering method aluminium coat film, or aluminium-alundum (Al2O3) composite membrane, or the compound film of aluminium-stainless steel and consisting of.
3. a kind of Self-concentration full-glass solar energy collecting vacuum tube according to claim 1 and 2 is characterized in that: have weather resistant protection layer (11) on described concave reflection minute surface (8) outer surface.
4. a kind of Self-concentration full-glass solar energy collecting vacuum tube according to claim 1 and 2, it is characterized in that: axial second side pipe wall of the cover glass tube (1) that described concave reflection minute surface (8) depends on is arc surface shape, perhaps being CPC composite parabolic shape, perhaps is symmetrical paraboloidal.
5. a kind of Self-concentration full-glass solar energy collecting vacuum tube according to claim 3, it is characterized in that: axial second side pipe wall of its cover glass tube that depends on (1) of described concave reflection minute surface (8) is arc surface shape, perhaps being CPC composite parabolic shape, perhaps is symmetrical paraboloidal.
6. a kind of Self-concentration full-glass solar energy collecting vacuum tube according to claim 1 and 2, it is characterized in that: for the rounded described cover glass tube (1) of integral body, the external diameter greater than described inner glass tube (2) that its external diameter is unconventional, the external diameter of described inner glass tube (2) be described cover glass tube (1) external diameter 1/3～1/5.
7. a kind of Self-concentration full-glass solar energy collecting vacuum tube according to claim 3, it is characterized in that: for the rounded described cover glass tube (1) of integral body, the external diameter greater than described inner glass tube (2) that its external diameter is unconventional, the external diameter of described inner glass tube (2) be described cover glass tube (1) external diameter 1/3～1/5.
8. a kind of Self-concentration full-glass solar energy collecting vacuum tube according to claim 4, it is characterized in that: for the rounded described cover glass tube (1) of integral body, the external diameter greater than described inner glass tube (2) that its external diameter is unconventional, the external diameter of described inner glass tube (2) be described cover glass tube (1) external diameter 1/3～1/5.
9. a kind of Self-concentration full-glass solar energy collecting vacuum tube according to claim 5, it is characterized in that: for the rounded described cover glass tube (1) of integral body, the external diameter greater than described inner glass tube (2) that its external diameter is unconventional, the external diameter of described inner glass tube (2) be described cover glass tube (1) external diameter 1/3～1/5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104800740A CN102927709A (en) | 2012-11-23 | 2012-11-23 | Self-condensation all-glass vacuum solar collecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104800740A CN102927709A (en) | 2012-11-23 | 2012-11-23 | Self-condensation all-glass vacuum solar collecting pipe |
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| Publication Number | Publication Date |
|---|---|
| CN102927709A true CN102927709A (en) | 2013-02-13 |
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| CN2012104800740A Pending CN102927709A (en) | 2012-11-23 | 2012-11-23 | Self-condensation all-glass vacuum solar collecting pipe |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2443295Y (en) * | 2000-10-06 | 2001-08-15 | 徐鸿胜 | Light-focusing glass vacuum solar heat collecting tube |
| EP1491831A2 (en) * | 2003-06-24 | 2004-12-29 | Kokusai Gijutsu Kaihatsu Kabushiki Kaisha | Solar heat collecting apparatus |
| CN1928457A (en) * | 2005-09-05 | 2007-03-14 | 徐宝安 | Solar vacuum energy exchange thermal-collecting tube |
| CN2886442Y (en) * | 2006-04-07 | 2007-04-04 | 杨天敏 | Vacuum heat collection tube capable of increasing illumination area and reducing heat loss for solar water heater |
| CN101354197A (en) * | 2007-08-27 | 2009-01-28 | 东南大学 | Hot pipe type self-focusing vacuum heat collection tube |
| CN101598388A (en) * | 2008-06-02 | 2009-12-09 | 北京环能海臣科技有限公司 | Cover glass pipe lens focus on the necking reducer all-glass vacuum heat collection pipe |
| CN201852305U (en) * | 2010-03-08 | 2011-06-01 | 高复立 | All-glass vacuum solar thermal collecting tube |
| CN202973614U (en) * | 2012-11-23 | 2013-06-05 | 程翠英 | Self-condensing full-glass solar vacuum heat-collecting tube |
-
2012
- 2012-11-23 CN CN2012104800740A patent/CN102927709A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2443295Y (en) * | 2000-10-06 | 2001-08-15 | 徐鸿胜 | Light-focusing glass vacuum solar heat collecting tube |
| EP1491831A2 (en) * | 2003-06-24 | 2004-12-29 | Kokusai Gijutsu Kaihatsu Kabushiki Kaisha | Solar heat collecting apparatus |
| EP1491831A3 (en) * | 2003-06-24 | 2010-07-28 | Kokusai Gijutsu Kaihatsu Kabushiki Kaisha | Solar heat collecting apparatus |
| CN1928457A (en) * | 2005-09-05 | 2007-03-14 | 徐宝安 | Solar vacuum energy exchange thermal-collecting tube |
| CN2886442Y (en) * | 2006-04-07 | 2007-04-04 | 杨天敏 | Vacuum heat collection tube capable of increasing illumination area and reducing heat loss for solar water heater |
| CN101354197A (en) * | 2007-08-27 | 2009-01-28 | 东南大学 | Hot pipe type self-focusing vacuum heat collection tube |
| CN101598388A (en) * | 2008-06-02 | 2009-12-09 | 北京环能海臣科技有限公司 | Cover glass pipe lens focus on the necking reducer all-glass vacuum heat collection pipe |
| CN201852305U (en) * | 2010-03-08 | 2011-06-01 | 高复立 | All-glass vacuum solar thermal collecting tube |
| CN202973614U (en) * | 2012-11-23 | 2013-06-05 | 程翠英 | Self-condensing full-glass solar vacuum heat-collecting tube |
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Application publication date: 20130213 |