CN104154665A - Solar heat collection device - Google Patents
Solar heat collection device Download PDFInfo
- Publication number
- CN104154665A CN104154665A CN201310715528.2A CN201310715528A CN104154665A CN 104154665 A CN104154665 A CN 104154665A CN 201310715528 A CN201310715528 A CN 201310715528A CN 104154665 A CN104154665 A CN 104154665A
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- China
- Prior art keywords
- thermal
- collecting tube
- area
- reflection plate
- solar energy
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
- F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Photovoltaic Devices (AREA)
Abstract
The invention relates to a solar heat collection device, in particular to a solar heat collection device (1) for absorbing solar energy through a heat collection unit. The solar heat collection device comprises the heat collection unit (5) composed of a glass tube (4) where a heat collection tube (3) is arranged in a built-in mode. Heated working media absorb heat from the heat collection tube (3), and the heat collection unit (5) is arranged in an inner face cavity of a concave face arc-shaped reflection plate (2). The heat collection tube (3) is provided with a first region (6) facing the concave face arc-shaped reflection plate (2), and a first absorption layer is laid on the first region. The heat collection tube (3) is provided with a second region (7) backing on to the concave face arc-shaped reflection plate (2). A second absorption layer is laid on the second region (7). Because the different absorption layers are laid on the different regions of the heat collection tube, selective absorption efficiency is improved, the utilization rate of solar energy is high, and the solar heat collection device is suitable for market popularization.
Description
Technical field
The present invention relates to a kind of solar energy heat collector, specifically one utilizes thermal-arrest unit to absorb solar device.
Background technology
Solar thermal utilization just refers to that utilizing photo-thermal switch technology is heat energy by transform light energy, and the heat that recycling obtains reaches the object that life is produced.Solar energy resources is abundant, renewable, utilizes solar energy, not only can solve disposable energy starved problem, simultaneously again can protection of the environment, promote the well-being of mankind.Can estimate, in the near future, solar heating engineering will become one of hot water supply pattern that people generally adopt.But disperse because solar energy has again the energy, collect difficult limitation.Thereby now needing one can extensively collect solar energy, thermal transition efficiency is high, produces easy solar heat gathering-device, solves above problem.Utilize and in process, exist the problem that thermal-arrest unit thermal absorptivity has much room for improvement in solar energy production.
In general hot-water supply system, the temperature rise of water is limited, generally can only reach 60 DEG C, and thermal-collecting tube internal-external temperature difference is little, and heat exchange amount is little.Cause in the value of hot water storage tank lowly, gross storage capacity is little.While answering night water consumption large, require water tank bulky, expend that steel are many and floor space is large, cost is high.And a side joint of thermal-arrest unit is subject to the irradiation of sunshine, be subject to reflector towards a side joint of reflector, and the situation of two kinds of irradiations differs greatly, and adopts same structure and sorbing material, is to have larger limitation to further raising heat absorption efficiency.In regular solar system, glass tube and built-in thermal-collecting tube meeting temperature towards reflecting plate one side are very high, dorsal part temperature is relatively much lower, while just adopting the absorbed layer of unification, cannot absorb for different radiation environment difference, affect on the one hand the further raising of absorption efficiency, long-term operation can affect service life and heat transfer effect in addition.
Summary of the invention
In order to solve technical problem above-mentioned, improve solar energy heating unit heat absorption efficiency, for the solar light irradiation situation of homonymy not, treat with a certain discrimination, technical scheme disclosed by the invention is proposed.
Concrete, the present invention discloses a kind of solar energy heat collector, comprises the thermal-arrest unit being made up of the glass tube of built-in thermal-collecting tube, is subject to hot working fluid flow and absorb heat in thermal-collecting tube, and described thermal-arrest unit is arranged in concave surface arc reflection plate inner face cavity; Described thermal-collecting tube has towards the first area of concave surface arc reflection plate, is laid with the first absorbed layer in described first area; Described thermal-collecting tube has the second area of concave surface arc reflection plate dorsad, is laid with the second absorbed layer at described second area.
The line at described concave surface arc reflection plate centre and thermal-collecting tube center, is separated into first area and second area perpendicular to this line and through the plane at thermal-collecting tube center by thermal-collecting tube outer surface.
Described concave surface arc reflection plate has top edge and lower limb, and from upper and lower edge, plane and the thermal-collecting tube outer surface through thermal-collecting tube center O is separated into first area and second area respectively.
Described glass tube also has this plane to be divided into the first glass surface towards concave surface arc reflection plate; The second glass surface of concave surface arc reflection plate dorsad, described the first glass surface is formed with astigmatic structure, and described the second glass surface is formed with the structure of optically focused.
Described the second absorbed layer is light absorbing zone, the first absorbed layer comprise the infrared absorption layer that is laid in outside thermal-collecting tube with and on light absorbing zone.
Described the first absorbed layer is different with the absorption spectrum of the second absorbed layer, and the absorption spectrum wavelength of the first absorbed layer is greater than the absorption spectrum wavelength of the second absorbed layer.
Between described thermal-collecting tube and glass tube, be connected by kovar alloy structure, this structure comprises the metal dish being connected with thermal-collecting tube, and this metal dish is connected with glass tube by kovar alloy expansion joint.Described metal dish is copper dish, on this copper dish, is provided with passage, and the described thermal-collecting tube being connected with described copper dish is copper pipe.
In described thermal-collecting tube, be provided with turbolator, this turbolator is double helix flow-disturbing silk, described flow-disturbing silk contact collector tube inner wall face.
In the side towards reflecting plate, the setting of difference is different from the heat-absorbing material of sunlight incidence zone, effectively adapts to the light conditions in sunlight reflected region, improves the heat absorption efficiency in this region.In thermal-collecting tube, adopt turbolator, effectively improve the temperature homogeneity of the working medium side in various refrigerant flow rate situations, reduce the more manifold temperature of local heating of thermal-collecting tube, improve overall heat absorption efficiency.
Brief description of the drawings
The thermal-arrest cell cross-section structural representation of Fig. 1, an embodiment of the present invention;
The thermal-arrest cell cross-section structural representation of Fig. 2, the another kind of embodiment of the present invention;
The thermal-arrest cell cross-section structural representation of Fig. 3, the another kind of embodiment of the present invention;
The axial cross section structural representation of the thermal-arrest unit of Fig. 4, an embodiment of the present invention;
The partial enlarged drawing of encircled in Fig. 5, Fig. 4 of the present invention.
Detailed description of the invention
In conjunction with Fig. 1-Fig. 5, by this each detailed description of the invention, describe the application's technical scheme in detail.
As shown in Figures 1 to 4, a kind of embodiment of the present invention discloses a kind of solar energy heat collector 1, comprise the thermal-arrest unit 5 being formed by the glass tube 4 of built-in thermal-collecting tube 3, show from Fig. 4 axial cross section structural representation, be subject to hot working fluid from thermal-collecting tube 3, flow and absorb heat, in conjunction with shown in Fig. 1 to Fig. 3, described thermal-arrest unit 5 is arranged in concave surface arc reflection plate 2 inner face cavitys; Described thermal-collecting tube 3 has towards the first area 6 of concave surface arc reflection plate 2, is laid with the first absorbed layer in described first area; Described thermal-collecting tube 3 has the second area 7 of concave surface arc reflection plate 2 dorsad, is laid with the second absorbed layer at described second area 7.
Shown in Fig. 1, solar energy heat collector 1 comprises the glass tube 4 of thermal-collecting tube 3 and surrounded set heat pipe, and concave surface arc reflection plate 2 forms, the thermal-arrest unit 5 that the glass tube 4 of built-in thermal-collecting tube 3 forms is arranged on concave surface arc reflection plate 2 inner face cavity side, sunray 18 directive heat collectors 1, part light is after 2 reflections of concave surface arc reflection plate, penetrate on thermal-collecting tube, part light 18 is directly penetrated on thermal-collecting tube, some light is radiated on concave surface arc reflection plate 2 through glass tube 4, is reflected on thermal-collecting tube.In conjunction with Fig. 2, described thermal-collecting tube 3 has towards the first area 6 of concave surface arc reflection plate 2, is laid with the first absorbed layer in described first area; Irradiate the temperature of concave surface arc reflection plate 2 meeting rising reflecting plate parts at sunray, and the temperature of raising reflecting plate 2 and glass tube 4, and the radiation event of this part and thermal-collecting tube 3 have the region of concave surface arc reflection plate 2 dorsad different, so have towards the first area 6 of concave surface arc reflection plate 2 at thermal-collecting tube 3, be laid with the first absorbed layer in first area; Thermal-collecting tube 3 has the second area 7 of concave surface arc reflection plate 2 dorsad, is laid with the second absorbed layer at second area 7.For different radiation environments, can improve the absorption thermal efficiency of thermal-collecting tube by difference absorbed layer.
Concrete, Fig. 2 is shown in concave surface arc reflection plate 2 has top edge 16 to pass the plane of thermal-collecting tube 3 center O and the line of demarcation of thermal-collecting tube 3 outer surfaces formation first areas and second area from top edge 16; Same, concave surface arc reflection plate 2 has lower limb 17, passes the plane of thermal-collecting tube 3 center O and the line of demarcation of thermal-collecting tube 3 outer surfaces formation first areas and second area from lower limb 17; Article two, line of demarcation is divided into first area and second area thermal-collecting tube outer surface, that is, face arc reflection plate has top edge and lower limb, and from upper and lower edge, plane and the thermal-collecting tube outer surface through thermal-collecting tube center O is separated into first area and second area respectively.Further, be laid with respectively the first absorbed layer and the second absorbed layer in first area and second area.Wherein, the first absorbed layer is different with the absorption spectrum of the second absorbed layer, and the absorption spectrum wavelength of the first absorbed layer is greater than the absorption spectrum wavelength of the second absorbed layer.
In one embodiment of the invention, as shown in Figure 3, concave surface arc reflection plate 2 has central point D, draws the straight line through thermal-collecting tube 3 center O from central point, the plane that is formed with vertical and straight line DO at center O place, is divided into thermal-collecting tube 3 outer surfaces first area and the second area that area is equal.Also, the line at described concave surface arc reflection plate centre and thermal-collecting tube center, is separated into first area and second area perpendicular to this line and through the plane at thermal-collecting tube center by thermal-collecting tube outer surface.Be laid with respectively the first absorbed layer and the second absorbed layer in first area and second area.Wherein, the first absorbed layer comprise the infrared absorption layer that is laid in outside thermal-collecting tube with and on light absorbing zone; Described the second absorbed layer is light absorbing zone, can absorb solar energy efficiently at the second area of sunray 18 direct projections like this, can effectively absorbing on the basis of luminous energy through light reflection and glass tube, the thermal-radiating second area of reflecting plate, absorb the infrared energy of low taste.
Further, be formed with the plane of vertical and straight line DO at thermal-collecting tube 3 center O places, glass tube 4 is divided into the first glass surface 8 and the second glass surface 9 that area equates, wherein the first glass surface 8 is towards concave surface arc reflection plate 2; The second glass surface 9 concave surface arc reflection plate 2 dorsad, described glass tube also has this plane to be divided into the first glass surface towards concave surface arc reflection plate; The second glass surface of concave surface arc reflection plate dorsad, described the first glass surface is formed with astigmatic structure, and described the second glass surface is formed with the structure of optically focused.Thereby, can improve the effect that is pooled to thermal-collecting tube 3 through the light of glass tube 4.It will be appreciated by those skilled in the art that, the glass surface of glass tube 4 is separated into the first glass surface 8 and the second glass surface 9 can the first area of reference set heat pipe and the separation mode of second area, and the plane that adopts thermal-collecting tube to separate can realize the separation of first and second glass surface of glass tube.
In an alternative embodiment of the invention, if Fig. 4 is in conjunction with as shown in Fig. 5, thermal-arrest unit 5 comprises the thermal-collecting tube 3 being arranged in glass tube 4, and working media flows through in thermal-collecting tube 3, takes away the heat energy of collection.Thermal-collecting tube is connected and comprises the metal dish 13 being connected with thermal-collecting tube with the kovar alloy structure of glass tube, and this metal dish 13 is connected with glass tube 4 by kovar alloy expansion joint 12, and described thermal-collecting tube is copper pipe.Be to be connected by kovar alloy structure between described thermal-collecting tube and glass tube, this structure comprises the metal dish being connected with thermal-collecting tube, and this metal dish is connected with glass tube by kovar alloy expansion joint.Described produces bellows with kovar alloy, intercepts the kovar alloy bellows of certain size, is welded into kovar alloy disk 13 with the circular copper sheet with aspirating hole 11, is used for connecting glass tube and thermal-collecting tube.The glass tube that intercepts corresponding size, welds kovar alloy dish at two ends, before dissolving, will carry out preheating to copper pipe, allows the condensation temperature of its temperature and glass be consistent.Both adopt coaxial rotation household to dissolve, and keep alignment.Copper pipe with absorption figure layer, through the glass tube with kovar alloy dish, is rotated to boxing, ensure air-tightness.After having welded, between glass tube and copper pipe, vacuumize.On glass tube, leave tail mouth, before vacuumizing, on exhaust station, carry out the pre-heat treatment, allow the inert gas on inner surface discharge.
Further, as Fig. 4 and Fig. 5, in thermal-collecting tube 3, be provided with turbolator 14, this turbolator 14 is double helix flow-disturbing silk, in thermal-collecting tube 3 when disturbance, flow-disturbing silk contacts with collector tube inner wall face 10, and the heat of internal face is taken in working media, in solar energy heating process, owing to absorbing the situation difference of heat energy, cause first area and second area heat is different, thereby cause surfaces of collector tubes temperature difference, can effectively reduce this temperature difference so turbolator 14 is set, improve thermal-collecting tube heat absorption efficiency.
Claims (9)
1. a solar energy heat collector, comprises the thermal-arrest unit being made up of the glass tube of built-in thermal-collecting tube, is subject to hot working fluid to absorb heat in thermal-collecting tube, it is characterized in that, described thermal-arrest unit is arranged in concave surface arc reflection plate inner face cavity; Described thermal-collecting tube outer surface has towards the first area of concave surface arc reflection plate, is laid with the first absorbed layer in described first area; Described thermal-collecting tube outer surface has the second area of concave surface arc reflection plate dorsad, is laid with the second absorbed layer at described second area.
2. solar energy heat collector according to claim 1, it is characterized in that: the line at described concave surface arc reflection plate centre and thermal-collecting tube center, is separated into first area and second area perpendicular to this line and through thermal-collecting tube center O plane by thermal-collecting tube outer surface.
3. solar energy heat collector according to claim 1, it is characterized in that: described concave surface arc reflection plate has top edge and lower limb, from upper and lower edge, plane and the thermal-collecting tube outer surface through thermal-collecting tube center O is separated into first area and second area respectively.
4. solar energy heat collector according to claim 1, is characterized in that: described the second absorbed layer is light absorbing zone, the first absorbed layer comprise the infrared absorption layer that is laid in outside thermal-collecting tube with and on light absorbing zone.
5. solar energy heat collector according to claim 1, is characterized in that: described the first absorbed layer is different with the absorption spectrum of the second absorbed layer, and the absorption spectrum wavelength of the first absorbed layer is greater than the absorption spectrum wavelength of the second absorbed layer.
6. according to the solar energy heat collector described in claim 2 or 3, it is characterized in that: described glass tube also has this plane to be divided into the first glass surface towards concave surface arc reflection plate; The second glass surface of concave surface arc reflection plate dorsad, described the first glass surface is formed with astigmatic structure, and described the second glass surface is formed with the structure of optically focused.
7. according to the solar energy heat collector described in any one in claim 1-5, it is characterized in that being connected by kovar alloy structure between described thermal-collecting tube and glass tube, this structure comprises the metal dish being connected with thermal-collecting tube, and this metal dish is connected with glass tube by kovar alloy expansion joint.
8. solar energy heat collector according to claim 7, is characterized in that: described metal dish is copper dish, on this copper dish, is provided with passage, and the described thermal-collecting tube being connected with described copper dish is copper pipe.
9. solar energy heat collector according to claim 7, is characterized in that: in described thermal-collecting tube, be provided with turbolator, this turbolator is double helix flow-disturbing silk, described flow-disturbing silk contact collector tube inner wall face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715528.2A CN104154665B (en) | 2013-12-23 | 2013-12-23 | A kind of solar energy heat collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715528.2A CN104154665B (en) | 2013-12-23 | 2013-12-23 | A kind of solar energy heat collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104154665A true CN104154665A (en) | 2014-11-19 |
| CN104154665B CN104154665B (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310715528.2A Expired - Fee Related CN104154665B (en) | 2013-12-23 | 2013-12-23 | A kind of solar energy heat collector |
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| Country | Link |
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| CN (1) | CN104154665B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576079A (en) * | 2016-06-30 | 2018-01-12 | 北京旭日晶旸太阳能科技有限公司 | A kind of light-concentrating solar heat-collection pipe |
| CN108253641A (en) * | 2018-01-30 | 2018-07-06 | 王冀军 | A kind of solar water heater of anti-cracking |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050339A (en) * | 1983-08-29 | 1985-03-20 | Matsushita Electric Ind Co Ltd | Vacuum tube type solar heat collecting device |
| CN1321865A (en) * | 2001-05-29 | 2001-11-14 | 清华大学 | Glass-metal vacuum solar heat-collecting tube and its production method |
| CN200993488Y (en) * | 2006-12-27 | 2007-12-19 | 章建华 | Metal inner pipe two-way vacuum coated heat collecting pipe |
| WO2012073664A1 (en) * | 2010-12-01 | 2012-06-07 | 株式会社日立プラントテクノロジー | Solar thermal collector tube |
| CN203629072U (en) * | 2013-12-23 | 2014-06-04 | 北京大学工学院包头研究院 | Solar heat collection device |
-
2013
- 2013-12-23 CN CN201310715528.2A patent/CN104154665B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050339A (en) * | 1983-08-29 | 1985-03-20 | Matsushita Electric Ind Co Ltd | Vacuum tube type solar heat collecting device |
| CN1321865A (en) * | 2001-05-29 | 2001-11-14 | 清华大学 | Glass-metal vacuum solar heat-collecting tube and its production method |
| CN200993488Y (en) * | 2006-12-27 | 2007-12-19 | 章建华 | Metal inner pipe two-way vacuum coated heat collecting pipe |
| WO2012073664A1 (en) * | 2010-12-01 | 2012-06-07 | 株式会社日立プラントテクノロジー | Solar thermal collector tube |
| CN203629072U (en) * | 2013-12-23 | 2014-06-04 | 北京大学工学院包头研究院 | Solar heat collection device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107576079A (en) * | 2016-06-30 | 2018-01-12 | 北京旭日晶旸太阳能科技有限公司 | A kind of light-concentrating solar heat-collection pipe |
| CN108253641A (en) * | 2018-01-30 | 2018-07-06 | 王冀军 | A kind of solar water heater of anti-cracking |
| CN108253641B (en) * | 2018-01-30 | 2020-07-24 | 敏达环保科技（嘉兴）有限公司 | Anti-cracking solar water heater |
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| Publication number | Publication date |
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| CN104154665B (en) | 2016-11-23 |
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Address after: Peking University Science Park 014010 the Inner Mongolia Autonomous Region Jiuyuan District of Baotou city planning new equipment Park District 2 Building 2 layer Applicant after: Packet header innovation research institute of Peking University Address before: 014010 room B, block, management committee, equipment manufacturing park, Qingshan District, the Inner Mongolia Autonomous Region, China Applicant before: BAOTOU RESEARCH INSTITUTE, COLLEGE OF ENGINEERING, PKU |
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Granted publication date: 20161123 Termination date: 20201223 |