CN110579027A - Solar vacuum heat collecting tube based on coiled flat pulsating heat pipe - Google Patents
Solar vacuum heat collecting tube based on coiled flat pulsating heat pipe Download PDFInfo
- Publication number
- CN110579027A CN110579027A CN201910770206.5A CN201910770206A CN110579027A CN 110579027 A CN110579027 A CN 110579027A CN 201910770206 A CN201910770206 A CN 201910770206A CN 110579027 A CN110579027 A CN 110579027A
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- CN
- China
- Prior art keywords
- glass tube
- heat pipe
- coiled flat
- flat pulsating
- pulsating heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- 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
-
- 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
- F24S10/90—Solar heat collectors using working fluids using internal thermosiphonic circulation
- F24S10/95—Solar heat collectors using working fluids using internal thermosiphonic circulation having evaporator sections and condenser sections, e.g. heat pipes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/10—Details of absorbing elements characterised by the absorbing material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
- F24S80/60—Thermal insulation
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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)
- Thermal Insulation (AREA)
Abstract
The invention relates to the technical field of solar water heaters, in particular to a solar vacuum heat collecting tube based on a coiled flat pulsating heat pipe. Comprises a vacuum glass tube and a coiled flat pulsating heat pipe; the vacuum glass tube comprises an inner glass tube and an outer glass tube, the inner glass tube is arranged in the outer glass tube, and a vacuum interlayer is formed between the inner glass tube and the outer glass tube; the coiled flat pulsating heat pipe is a hollow cylinder coiled by the mutual matching of the boundaries at the two sides of the flat pulsating heat pipe; the evaporation section of the coiled flat pulsating heat pipe extends into the inner glass pipe, and the condensation section of the coiled flat pulsating heat pipe extends into the heat exchange water tank; the surface of the evaporation section is plated with a solar selective absorption layer, and water is filled between the inner glass tube and the evaporation section of the coiled flat pulsating heat pipe to form a heat preservation water layer. The invention can effectively improve the heat exchange efficiency of the solar vacuum heat collecting tube.
Description
Technical Field
The invention relates to the technical field of solar water heaters, in particular to a solar vacuum heat collecting tube based on a coiled flat pulsating heat pipe.
Background
With the development of society, the country advocates low-carbon environment-friendly life, and more attaches importance to the development and application of new energy. Solar energy is used as a clean, pollution-free, safe and reliable renewable energy source and is well applied, for example, solar water heaters are more and more commonly used, the heat collection unit of the solar water heater mainly in the market at present is a full-glass vacuum tube, the heat collection principle is that a selective absorption layer is coated on the outer surface of an inner glass tube of a solar vacuum heat collection tube, heat absorbed by the outer surface is transferred to a heat exchange heat tube in a heat radiation mode, and the heat transfer process has great thermal contact resistance, large heat loss and low heat transfer efficiency.
Due to the practical limitations, the application of the all-glass vacuum tube is limited, and in order to improve the application performance and expand the application range of the all-glass vacuum tube, it is necessary to improve the above disadvantages of the currently applied all-glass vacuum tube.
Disclosure of Invention
The invention provides the solar vacuum heat collecting tube based on the coiled flat pulsating heat tube, aiming at overcoming the defect of low heat exchange efficiency of the solar vacuum heat collecting tube in the prior art, and the heat exchange efficiency of the solar vacuum heat collecting tube can be effectively improved.
In order to solve the technical problems, the invention adopts the technical scheme that: a solar vacuum heat collecting tube based on a coiled flat pulsating heat pipe comprises a vacuum glass tube and the coiled flat pulsating heat pipe; the vacuum glass tube comprises an inner glass tube and an outer glass tube, the inner glass tube is arranged in the outer glass tube, and a vacuum interlayer is formed between the inner glass tube and the outer glass tube; the coiled flat pulsating heat pipe is a hollow cylinder formed by mutually connecting and matching the boundaries of two sides of the flat pulsating heat pipe; the evaporation section of the coiled flat pulsating heat pipe extends into the inner glass pipe, and the condensation section of the coiled flat pulsating heat pipe extends into the heat exchange water tank; the surface of the evaporation section is plated with a solar selective absorption layer, and water is filled between the inner glass tube and the evaporation section of the coiled flat pulsating heat pipe to form a heat preservation water layer. The heat exchange water tank is fixed at the side of the solar vacuum heat collecting tube, a water inlet is arranged below the water tank, and a water outlet is arranged above the water tank. The coiled flat pulsating heat pipe is fixed in the inner glass pipe by adopting a fixing frame, and the other end of the coiled flat pulsating heat pipe extends into the heat exchange water tank after being fixedly connected with the mounting hole of the heat exchange water tank in a sealing way, so that the coiled flat pulsating heat pipe is ensured to be stably and reliably mounted.
Furthermore, the outer diameter value of the coiled flat pulsating heat pipe is smaller than the inner diameter value of the inner glass pipe. The coiled flat pulsating heat pipe is formed by mutually matching the boundaries at the two sides of the flat pulsating heat pipe, is coiled into a hollow cylinder and is installed in the solar vacuum heat collecting pipe, the outer diameter of the coiled flat pulsating heat pipe is smaller than the inner diameter of the inner glass pipe of the solar vacuum heat collecting pipe, the outer diameter of the coiled flat pulsating heat pipe is not required to be attached to the wall surface of the inner glass pipe, the outer diameter of the coiled flat pulsating heat pipe can be designed according to the requirements of actual working conditions, and the operability is strong.
Furthermore, a spring clip is arranged in the vacuum interlayer and used for fixing the inner glass tube and the outer glass tube, and a gap is formed between the inner glass tube and the outer glass tube to form the vacuum interlayer. A vacuum interlayer is arranged between an inner glass tube and an outer glass tube of the vacuum glass tube, a spring clip and a getter are arranged in the vacuum interlayer, and the spring clip fixes the inner glass tube and the outer glass tube so as to ensure the distance between the inner layer glass and the outer layer glass.
Furthermore, a getter is also arranged in the vacuum interlayer. The getter is placed on the spring clip to maintain the whole interlayer in a vacuum state.
Furthermore, the flat pulsating heat pipe comprises a base plate and a cover plate, wherein a channel which is connected end to end is carved on the base plate, working media are filled in the channel, and the channel is sealed through the cover plate.
Preferably, the width of the channel is not more than 3mm, and the number of the channels is not less than 25; the cross section of the channel is square, round or semicircular; the working medium is pure water, and the filling rate of the working medium is 50-70%.
Preferably, the material used for the base plate and the cover plate is a copper plate or an aluminum plate.
Furthermore, water in the heat exchange water tank enters between the inner glass tube and the coiled flat pulsating heat pipe through the hollow channel of the coiled flat pulsating heat pipe, and the whole inner glass tube is filled with the water to form a heat preservation water layer. Further isolating the heat loss, and making the most full use of the heat absorbed by the selective absorption layer at the evaporation section of the coiled flat pulsating heat pipe.
Furthermore, the coiled flat pulsating heat pipe is divided into an evaporation section, a heat insulation section and a condensation section, wherein the evaporation section is positioned inside the inner glass pipe; the heat insulation section is positioned at the joint of the pulsating heat pipe and the mounting hole of the heat exchange water tank and is covered by a heat insulation material; the condensing section extends into the heat exchange water tank to exchange heat with water in the heat exchange water tank.
Compared with the prior art, the beneficial effects are:
1. The invention provides a solar vacuum heat collecting tube based on a coiled flat pulsating heat tube, compared with the traditional all-glass vacuum heat collecting tube, a solar selective absorption layer is directly plated on the outer surface of the coiled flat pulsating heat tube and is not contacted with a glass tube in the solar vacuum heat collecting tube, heat can be directly absorbed by the solar selective absorption layer and transferred to the coiled flat pulsating heat tube, and the thermal resistance in the heat transfer process is greatly reduced;
2. The invention provides a solar vacuum heat collecting tube based on a coiled flat pulsating heat tube, wherein water in a heat exchange water tank is filled between an inner glass tube and the coiled flat pulsating heat tube to form a heat preservation water layer, so that the heat loss is further reduced, the heat absorbed by the solar vacuum heat collecting tube is only transferred to water from the coiled flat pulsating heat tube without the influence of other heat exchange media, and the utilization degree of solar energy is improved.
Drawings
FIG. 1 is a schematic view of the internal structure of the solar vacuum heat collecting tube of the present invention.
FIG. 2 is a schematic view of a three-dimensional structure of a coiled flat pulsating heat pipe according to the present invention.
Fig. 3 is a cross-sectional view a-a of fig. 2 of the present invention.
FIG. 4 is an expanded view of the coiled flat pulsating heat pipe of the present invention.
Detailed Description
The drawings are for illustration purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.
As shown in fig. 1 to 4, a solar vacuum heat collecting tube based on a coiled flat pulsating heat pipe 2 comprises a vacuum glass tube 1 and the coiled flat pulsating heat pipe 2; the vacuum glass tube 1 comprises an inner glass tube 4 and an outer glass tube 3, the inner glass tube 4 is arranged in the outer glass tube 3, a vacuum interlayer 5 is formed between the inner glass tube 4 and the outer glass tube 3, the inner glass tube 4 and the outer glass tube 3 are both made of borosilicate glass, the diameter of the outer glass tube 3 is 47mm, the diameter of the inner glass tube 4 is 37mm, the tube thickness is 1.6mm, and the tube length is 1500 mm; the coiled flat pulsating heat pipe 2 is a hollow cylinder formed by mutually matching the boundaries at the two sides of the flat pulsating heat pipe; the evaporation section 13 of the coiled flat pulsating heat pipe 2 extends into the inner glass tube 4 and is fixed in the inner glass tube 4 through the fixing frame 6 so as to ensure that the evaporation section is not contacted with the inner wall of the inner glass tube 4; the condensing section 15 extends into the heat exchange water tank; the surface of the evaporation section 13 is plated with a solar selective absorption layer, and water is filled between the inner glass tube 4 and the evaporation section 13 of the coiled flat pulsating heat pipe 2 to form a heat preservation water layer 9. The heat exchange water tank is fixed at the side of the solar vacuum heat collecting tube, a water inlet 17 is arranged below the water tank, and a water outlet 16 is arranged above the water tank. The coiled flat pulsating heat pipe 2 is fixed in the inner glass pipe 4 by adopting the fixing frame 6, and the other end of the coiled flat pulsating heat pipe extends into the heat exchange water tank after being fixedly connected with the mounting hole of the heat exchange water tank in a sealing way, so that the coiled pulsating heat pipe is ensured to be stably and reliably mounted.
Specifically, the outer diameter value of the coiled flat pulsating heat pipe 2 is smaller than the inner diameter value of the inner glass tube 4. The coiled flat pulsating heat pipe 2 is formed by mutually matching the boundaries at the two sides of the flat pulsating heat pipe, is coiled into a hollow cylinder and is installed inside the solar vacuum heat collecting pipe, the outer diameter of the coiled flat pulsating heat pipe 2 is smaller than the inner diameter of the inner glass pipe 4 of the solar vacuum heat collecting pipe, the outer diameter of the coiled flat pulsating heat pipe 2 can be designed according to the requirements of actual working conditions without being attached to the wall surface of the inner glass pipe 4, and the operability is strong.
Wherein, a spring clip 7 is arranged in the vacuum interlayer 5, the spring clip 7 is used for fixing the inner glass tube 4 and the outer glass tube 3, and a gap is formed between the inner glass tube 4 and the outer glass tube 3 to form the vacuum interlayer 5; a getter 8 is also placed inside the vacuum interlayer 5. A vacuum interlayer 5 is arranged between an inner glass tube 4 and an outer glass tube 3 of the vacuum glass tube 1, a spring clip 7 and a getter 8 are arranged in the vacuum interlayer 5, wherein the spring clip 7 fixes the inner glass tube 4 and the outer glass tube 3 so as to ensure the distance between the inner layer glass and the outer layer glass; a getter 8 is placed on the spring clip 7 to maintain the entire sandwich in a vacuum.
As shown in fig. 3 and 4, the flat pulsating heat pipe comprises a base plate 10 and a cover plate 11, the sizes of which are 110mm × 1750mm × 4mm and 110mm × 1750mm × 1mm respectively, and the flat pulsating heat pipe is made of a copper plate; the channels 12 of the coiled flat pulsating heat pipe 2 are square channels 12 with the side length of 3mm, the number of the channels 12 is 25, the distance between the channels is 1.5mm, the channels are sealed by a cover plate 11, purified water is filled into the channels 12 as a working medium, and the filling rate of the working medium is 60%.
In addition, water in the heat exchange water tank enters between the inner glass tube 4 and the coiled flat pulsating heat pipe 2 through a hollow channel of the coiled flat pulsating heat pipe 2, and the whole inner glass tube 4 is filled to form a heat preservation water layer 9. Further isolating the heat loss, and making the heat absorbed by the selective absorption layer of the evaporation section 13 of the coiled flat pulsating heat pipe 2 be utilized most fully.
The coiled flat pulsating heat pipe 2 is divided into an evaporation section 13, a heat insulation section 14 and a condensation section 15, the lengths of the evaporation section 13, the heat insulation section 14 and the condensation section are 1450mm, 50mm and 250mm respectively, and the total length of the coiled flat pulsating heat pipe is 1750 mm; the evaporation section 13 is positioned inside the inner glass tube 4; the heat insulation section 14 is positioned at the joint of the pulsating heat pipe and the mounting hole of the heat exchange water tank and is covered by a heat insulation material; the condensation section 15 extends into the heat exchange water tank to exchange heat with water in the heat exchange water tank.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. a solar vacuum heat collecting tube based on a coiled flat pulsating heat pipe is characterized by comprising a vacuum glass tube (1) and a coiled flat pulsating heat pipe (2); the vacuum glass tube (1) comprises an inner glass tube (4) and an outer glass tube (3), the inner glass tube (4) is arranged in the outer glass tube (3), and a vacuum interlayer (5) is formed between the inner glass tube (4) and the outer glass tube (3); the coiled flat pulsating heat pipe (2) is a hollow cylinder which is coiled by mutually connecting and matching the boundaries of two sides of the flat pulsating heat pipe; an evaporation section (13) of the coiled flat pulsating heat pipe (2) extends into the inner glass pipe (4), and a condensation section (15) extends into the heat exchange water tank; the surface of the evaporation section (13) is plated with a solar selective absorption layer, and water is filled between the inner glass tube (4) and the evaporation section (13) of the coiled flat pulsating heat pipe (2) to form a heat preservation water layer (9).
2. The solar vacuum heat collecting tube based on the coiled flat pulsating heat pipe as claimed in claim 1, wherein the outer diameter value of the coiled flat pulsating heat pipe (2) is smaller than the inner diameter value of the inner glass tube (4).
3. The solar vacuum heat collecting tube based on the coiled flat pulsating heat tube as claimed in claim 2, wherein a spring clip (7) is arranged in the vacuum interlayer (5), and the spring clip (7) is used for fixing the inner glass tube (4) and the outer glass tube (3) to form a gap between the inner glass tube and the outer glass tube to form the vacuum interlayer (5).
4. the solar vacuum heat collecting tube based on the coiled flat pulsating heat pipe as claimed in claim 3, wherein a getter (8) is further placed in the vacuum interlayer (5).
5. The solar vacuum heat collecting tube based on the coiled flat pulsating heat pipe as claimed in claim 2, wherein the flat pulsating heat pipe comprises a base plate (10) and a cover plate (11), wherein channels (12) which are connected end to end are carved on the base plate (10), the channels (12) are filled with working media, and the channels (12) are sealed through the cover plate (11).
6. The solar vacuum heat collecting tube based on the coiled flat pulsating heat pipe as claimed in claim 5, wherein the groove width of the channels (12) is not more than 3mm, and the number of the channels (12) is not less than 25; the cross section of the channel (12) is square, round or semicircular; the working medium is pure water, and the filling rate of the working medium is 50-70%.
7. The solar vacuum heat collecting tube based on the coiled flat pulsating heat pipe as claimed in claim 5, wherein the material used for the base plate (10) and the cover plate (11) is a copper plate or an aluminum plate.
8. The solar vacuum heat collecting tube based on the coiled flat pulsating heat pipe as claimed in any one of claims 1 to 7, wherein water in the heat exchange water tank enters between the inner glass tube (4) and the coiled flat pulsating heat pipe (2) through the hollow channel of the coiled flat pulsating heat pipe (2), and fills the whole inner glass tube (4) to form a heat preservation water layer (9).
9. The solar vacuum heat collecting tube based on the coiled flat pulsating heat pipe as claimed in claim 8, wherein the coiled flat pulsating heat pipe (2) is divided into an evaporation section (13), a heat insulation section (14) and a condensation section (15), and the evaporation section (13) is positioned inside the inner glass tube (4); the heat insulation section (14) is positioned at the joint of the pulsating heat pipe and the mounting hole of the heat exchange water tank and is covered by a heat insulation material; the condensing section (15) extends into the heat exchange water tank to exchange heat with water in the heat exchange water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770206.5A CN110579027A (en) | 2019-08-20 | 2019-08-20 | Solar vacuum heat collecting tube based on coiled flat pulsating heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910770206.5A CN110579027A (en) | 2019-08-20 | 2019-08-20 | Solar vacuum heat collecting tube based on coiled flat pulsating heat pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110579027A true CN110579027A (en) | 2019-12-17 |
Family
ID=68811181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910770206.5A Pending CN110579027A (en) | 2019-08-20 | 2019-08-20 | Solar vacuum heat collecting tube based on coiled flat pulsating heat pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110579027A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632415A (en) * | 2005-01-17 | 2005-06-29 | 华北电力大学（北京） | Oscillating flow heat pipe composite reinforcement solar water heater |
| CN101021365A (en) * | 2007-03-13 | 2007-08-22 | 华北电力大学 | Solar energy vacuum glass heat accumulating tube utilizing oscillating flow heat tube as heat internal tube |
| CN201001247Y (en) * | 2007-01-12 | 2008-01-02 | 华南理工大学 | Pulsatile hot pipe type cooling plate |
| EP2065658A1 (en) * | 2007-11-28 | 2009-06-03 | Hochschule für Technik Rapperswil Institut für Solartechnik SPF | Solar absorber and method for manufacturing the same |
| CN201637149U (en) * | 2010-04-28 | 2010-11-17 | 长春工程学院 | Spiral pulsating heat pipe solar water heater |
| CN204084894U (en) * | 2014-05-21 | 2015-01-07 | 中国华能集团清洁能源技术研究院有限公司 | A kind of linear Fresnel formula solar thermal collector using pulsating heat pipe |
| JP2018071884A (en) * | 2016-10-28 | 2018-05-10 | 富士通株式会社 | Self-excited vibration heat pipe and electronic apparatus |
| CN109463962A (en) * | 2019-01-10 | 2019-03-15 | 北京建筑大学 | A kind of fast-cooling thermal insulating cup |
-
2019
- 2019-08-20 CN CN201910770206.5A patent/CN110579027A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1632415A (en) * | 2005-01-17 | 2005-06-29 | 华北电力大学（北京） | Oscillating flow heat pipe composite reinforcement solar water heater |
| CN201001247Y (en) * | 2007-01-12 | 2008-01-02 | 华南理工大学 | Pulsatile hot pipe type cooling plate |
| CN101021365A (en) * | 2007-03-13 | 2007-08-22 | 华北电力大学 | Solar energy vacuum glass heat accumulating tube utilizing oscillating flow heat tube as heat internal tube |
| EP2065658A1 (en) * | 2007-11-28 | 2009-06-03 | Hochschule für Technik Rapperswil Institut für Solartechnik SPF | Solar absorber and method for manufacturing the same |
| CN201637149U (en) * | 2010-04-28 | 2010-11-17 | 长春工程学院 | Spiral pulsating heat pipe solar water heater |
| CN204084894U (en) * | 2014-05-21 | 2015-01-07 | 中国华能集团清洁能源技术研究院有限公司 | A kind of linear Fresnel formula solar thermal collector using pulsating heat pipe |
| JP2018071884A (en) * | 2016-10-28 | 2018-05-10 | 富士通株式会社 | Self-excited vibration heat pipe and electronic apparatus |
| CN109463962A (en) * | 2019-01-10 | 2019-03-15 | 北京建筑大学 | A kind of fast-cooling thermal insulating cup |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191217 |
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| RJ01 | Rejection of invention patent application after publication |