CN108266901A - A kind of air vacuum tube solar thermal collector - Google Patents
A kind of air vacuum tube solar thermal collector Download PDFInfo
- Publication number
- CN108266901A CN108266901A CN201711331200.5A CN201711331200A CN108266901A CN 108266901 A CN108266901 A CN 108266901A CN 201711331200 A CN201711331200 A CN 201711331200A CN 108266901 A CN108266901 A CN 108266901A
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- CN
- China
- Prior art keywords
- vacuum tube
- air
- glass
- porous media
- 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.)
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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
- F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
-
- 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
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
-
- 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
- F24S10/80—Solar heat collectors using working fluids comprising porous material or permeable masses directly contacting the working fluids
-
- 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
-
- 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)
- Chemical & Material Sciences (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Photovoltaic Devices (AREA)
- Joining Of Glass To Other Materials (AREA)
Abstract
The invention discloses a kind of air vacuum tube solar thermal collectors, including glass-vacuum tube, porous media column are equipped at the glass-vacuum tube inside center, the outside of porous media column is enclosed with translucent skeletal porous medium；The opening of glass-vacuum tube is sealed up by sealing ring, and sealing ring is equipped with air leading-in conduit and air delivery line.Compared with prior art, the present invention realize air etc. temperature difference heat exchange, heat-transfer effect is good.The convection transfer rate of solid skeletal and air is high, is hundreds and thousands of times of the pipe coefficient of heat transfer.The overall thermal high conversion efficiency of device.The present invention does not have solar energy coating, the good reliability of system.
Description
Technical field
The invention belongs to heat energy utilization field, more particularly to a kind of air vacuum tube solar thermal collector.
Background technology：
As green building, the continuous of building energy conservation are popularized, the development and utilization of solar thermal collector is increasingly by weight
Depending on.Gas vacuum pipe heat collector utilizes solar energy heating air (as shown in Figure 1), for heating, drying and chemical process etc..By
In solar energy current density than relatively low, in practical application, common several vacuum tube collectors are together in series or parallel, and heating is empty
Gas reaches rated condition.
Gas vacuum pipe heat collector utilizes solar energy heating air for heating and drying.Gas vacuum pipe common at present
Heat collector uses interpolation pipe frame mode, and air flows into vacuum tube from interpolation pipe, from glass-vacuum tube and interpolation pipe gap
Outflow, absorbs interpolation tube wall heat and inner layer glass tube wall heat, and glass tube with vacuum is finally flowed out in temperature raising.
Since air is gas, with the convection heat transfer intensity of tube wall than relatively low, lead to air and interpolation pipe and glass tube
Convective Heat Transfer is poor, and the thermal efficiency ratio of system is relatively low.Simultaneously because Convective Heat Transfer ratio of the air to vacuum glass
Poor, the temperature of glass tube is higher, the easy ageing failure of sun light coating on glass tube, and influence heat collector uses the longevity
Life.
The present invention is absorbed from solar energy highly effective strengthens heat convection angle with air, proposes that a kind of translucent skeleton of filling is more
The air vacuum tube solar thermal collector device of hole medium.One, the device air and the heat convection in solar energy heat absorbing face
Can be high, the thermal efficiency is high；Secondly, heat-absorbent surface do not need to sun light coating, system service life is long, cost also relative moderate.
Patent application No. is 2014100208847 discloses a kind of full glass shell-and-tube solar energy vacuum tube heat collector,
It includes outer glass pipe, antisolar glass pipe and inner glass tube three-decker, it is characterised in that：Endothermic tube glass and inner glass tube it
Between shell cavity form the heated chamber of thermodynamic medium, thermodynamic medium heat cycles in glass shell cavity, while glass tube
Shell cavity is also the flow channel and flow pass of thermodynamic medium, and at least two trepannings are equipped in the right end of antisolar glass pipe；
There are one silica gel plugs for the right output port installation of inner glass tube.
Patent application No. is 2014100126014 discloses the vacuum tube heat collection function of a kind of high-effective concentration and passive protection
Device, including union pipe, multiple vacuum tubes and base frame, each vacuum tube is provided at both ends with ring-shaped guide rail, which consolidates
Due on union pipe and base frame, condenser groove is provided with outside vacuum tube, which is distinguished by helical gear and runner
It is connected with ring-shaped guide rail so that condenser groove is rotated around vacuum tube axis line, also has the screw rod being meshed on helical gear.Optically focused
Slot can effectively collect the sunlight of oblique incidence, and higher optically focused can be reached by not needing to tracking position of sun at any time
Than.
But existing vacuum tube collector patent thinking is concentrated mainly on the flowing of fluid and heat absorption mode and concentrator
Design aspect, lack and the invention of efficient heat transfer mode proposed than relatively low for the gaseous exchange coefficient of heat transfer.The present invention proposes
It is a kind of that surface sunlight absorption efficiency and the flowing of optimization air are absorbed heat so as to improve the filling of entire collector efficiency half by raising
The air vacuum tube solar thermal collector scheme of transparent skeletal porous medium.
The solar absorption process and cross-ventilation endothermic process of heat-absorbent surface are two not only relatively independent but also internal passes of presence
The process of connection.How to optimize heat-absorbent surface solar absorption and air and two processes of heat-absorbent surface heat convection, and carry out best
Match, be the key that improve the air vacuum tube heat collector thermal efficiency.The designing scheme of current air vacuum tube heat collector to this two
The specific aim analysis design of a process is insufficient, and leading to air vacuum tube heat collector, there are clearly disadvantageous：
1) solar absorption of current vacuum collector is mainly by the inner tube outer surface coating of glass evacuated casing or heat absorption
Sun light coating on fin is completed.Coating heat absorption is a kind of surface-type absorption process, and solar energy is concentrated on coating, easily
Cause coating high-temp aging, influence heat collector service life.
2) air vacuum tube heat collector is mainly interpolation pipe structure, and air enters vacuum tube by interpolation pipe, and glass evacuated
Pipe heat convection, heat absorption heating, finally flow out glass-vacuum tube.Due to air and pair of interpolation tube wall or glass evacuated tube wall
Stream heat exchange property is weaker, and the thermal efficiency ratio for leading to system is relatively low.
For the air vacuum tube heat collector thermal efficiency is high, sunlight heat absorbing coating due to temperature is high and aging is fast not
Foot, the present invention propose to fill the air vacuum tube solar thermal collector of translucent skeletal porous medium.The heat collector thermal efficiency is high,
Service life is long, has popularization and engineering application value well.
Technical solution：
To solve the problems, such as that current solar thermal collector exists, the invention discloses a kind of air vacuum tube solar heat-collectings
Device.
Realization that the present invention adopts the following technical solutions：
A kind of air vacuum tube solar thermal collector including glass-vacuum tube, is set at the glass-vacuum tube inside center
There is porous media column, the outside of porous media column is enclosed with translucent skeletal porous medium；The opening of glass-vacuum tube is by close
Seal seals up, and sealing ring is equipped with air leading-in conduit and air delivery line.
The both ends of the glass-vacuum tube are all sealed up by sealing ring；Wherein the sealing ring of one end is imported equipped with air
Pipe, the sealing ring of the other end are equipped with air delivery line.
Further to improve, the porous media column is foamed aluminium porous media column or sic foam porous media column；
The translucent skeletal porous medium is quartz glass or boron glass.
Compared with prior art, the present invention has thermal efficiency height, two advantages of good reliability：
1) sunlight for penetrating glass-vacuum tube sequentially passes through translucent skeletal porous medium and general porous media, due to
Translucent skeletal porous medium is small to the sun absorption coefficient of light, and the absorption coefficient to sunlight of general porous media is big, owns
Most of sunlight is absorbed by general porous media, and the temperature of general porous media is compared with the translucent skeletal porous medium temperature in outside
Degree is high, i.e., along air-flow direction, the temperature for the wall surface that absorbs heat gradually rises, realize air etc. temperature difference heat exchange, heat-transfer effect
It is good.On the other hand, porous media specific surface area is big, strong to the perturbation action of air, the heat convection of solid skeletal and air
Coefficient is high, is hundreds and thousands of times of the pipe coefficient of heat transfer.The overall thermal high conversion efficiency of device.
2) present invention does not have solar energy coating, and the mechanics and thermal property of porous media material are good, the good reliability of system.
Description of the drawings
Fig. 1 is inner-intubation vacuum tube collector structure diagram；
Fig. 2 is the schematic diagram of embodiment 1；
Fig. 3 is the Section A-A figure in Fig. 2；
Fig. 4 is the schematic diagram of embodiment 2.
Specific embodiment：
It is described in detail or describes by the following examples the present invention rather than limit the invention.
Embodiment 1：
(dotted arrow represents air circulation direction in figure) as shown in Figures 2 and 3, a kind of air vacuum tube solar collection
Hot device including glass-vacuum tube 1, is equipped with porous media column 3 at 1 inside center of glass-vacuum tube, porous media column 3 it is outer
Portion is enclosed with translucent skeletal porous medium 4.1 one end of glass-vacuum tube closing, the opening of the other end are sealed by sealing ring 2
Firmly；Air leading-in conduit 5 is located at the edge of sealing ring 2, and air delivery line 6 is located at 2 center of sealing ring, and air delivery line 6 is inserted into
Porous media column 5；Air delivery line 6, which is located on the part inside porous media column 5, is evenly distributed with stomata 8；In glass-vacuum tube
Equipped with support chip 7, support chip 7 fixes air delivery line 6.Air delivery line 6 is stainless steel tube, copper tube or aluminum pipe.It is described
8 aperture of stomata be 1~3mm, stomata 8 on air delivery line 6 lopping be distributed, often enclose 4~6, along tube axial direction arrangement 20~
30 circles.The porous media column 3 is foamed aluminium porous media column or sic foam porous media column；The translucent skeleton is more
Hole medium 4 is quartz glass or boron glass.
When heat collector works, incident sunlight passes through glass-vacuum tube 1, is passed into inner layer glass tube chamber to tube axial direction
It broadcasts, when sunlight passes through translucent skeletal porous medium 4, part sunlight is absorbed, and remaining sunlight continues to forward pass
It broadcasts, when sunlight passes through porous media column 3, is all absorbed.Due to the sun light absorption system of translucent skeletal porous medium 4
Number is smaller, and the sun absorption coefficient of light of porous media column 3 is bigger, so most of sunlight is by vacuum tube central area
Porous media column 3 absorb, the temperature of porous media column 3 is high, and translucent 4 temperature of skeletal porous medium of outer rim is compared with porous media
Column 3 it is low.
On the other hand, Cryogenic air from air leading-in conduit 5 enter vacuum tube cavity, first in glass-vacuum tube 1
Tube wall heat convection, pre-heating temperature elevation.Then in differential pressure action, translucent skeletal porous medium 4 is sequentially passed through along caliber direction
With porous media column 3, heat absorption heating, converged in air delivery line 6 then across the stomata 8 on air delivery line 6, finally from
The outlet of air delivery line 6 outflow.
It is consistent, it can be achieved that isothermal with the flowing heat absorption direction of air that the sun optical transport of the present embodiment heat collector absorbs direction
Difference heat exchange, heat-transfer effect is best, thermal efficiency highest.
Embodiment 2：
(dotted arrow represents air circulation direction in figure) as shown in Figure 4, a kind of air vacuum tube solar thermal collector,
Including glass-vacuum tube 1, porous media column 3 is equipped at 1 inside center of glass-vacuum tube, the external of porous media column 3 is wrapped
It is wrapped with translucent skeletal porous medium 4.The both ends of the glass-vacuum tube 1 are all sealed up by sealing ring 2；The wherein sealing of one end
Circle 2 is equipped with air leading-in conduit 5, and the sealing ring 2 of the other end is equipped with air delivery line 6.The porous media column 3 is foamed aluminium
Porous media column or sic foam porous media column；The translucent skeletal porous medium 4 is quartz glass or boron glass.
The structure of the present embodiment can realize the Gradient Absorption of sunlight, but can not realize and absorb heat along air-flow direction
The temperature of wall surface gradually rises, the temperature difference heat exchange such as realization, influences the thermal efficiency of system.
Claims (2)
1. a kind of air vacuum tube solar thermal collector, including glass-vacuum tube, which is characterized in that inside the glass-vacuum tube
Porous media column is equipped at center, the outside of porous media column is enclosed with translucent skeletal porous medium；Glass-vacuum tube is opened
It is sealed up at mouthful by sealing ring, sealing ring is equipped with air leading-in conduit and air delivery line；The both ends of the glass-vacuum tube are all
It is sealed up by sealing ring；Wherein the sealing ring of one end is equipped with air leading-in conduit, and the sealing ring of the other end is exported equipped with air
Pipe.
2. a kind of air vacuum tube solar thermal collector as described in claim 1, which is characterized in that the porous media column is
Foamed aluminium porous media column or sic foam porous media column；The translucent skeletal porous medium is quartz glass or boron glass
Glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711331200.5A CN108266901A (en) | 2016-08-04 | 2016-08-04 | A kind of air vacuum tube solar thermal collector |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610633557.8A CN106091415B (en) | 2016-08-04 | 2016-08-04 | A kind of air vacuum tube solar thermal collector |
| CN201711331200.5A CN108266901A (en) | 2016-08-04 | 2016-08-04 | A kind of air vacuum tube solar thermal collector |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610633557.8A Division CN106091415B (en) | 2016-08-04 | 2016-08-04 | A kind of air vacuum tube solar thermal collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108266901A true CN108266901A (en) | 2018-07-10 |
Family
ID=57454044
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610633557.8A Expired - Fee Related CN106091415B (en) | 2016-08-04 | 2016-08-04 | A kind of air vacuum tube solar thermal collector |
| CN201711331200.5A Pending CN108266901A (en) | 2016-08-04 | 2016-08-04 | A kind of air vacuum tube solar thermal collector |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610633557.8A Expired - Fee Related CN106091415B (en) | 2016-08-04 | 2016-08-04 | A kind of air vacuum tube solar thermal collector |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN106091415B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561788A (en) * | 2019-02-14 | 2020-08-21 | 浙江大学 | Solar gas heat absorption device and working method thereof |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108302784B (en) * | 2018-01-03 | 2019-07-12 | 东南大学 | A kind of bionic micropore surfactant foam metal filling solar vacuum heat-collecting pipe |
| CN108397915A (en) * | 2018-03-05 | 2018-08-14 | 王冀军 | A kind of solar water heater of homogeneous heating |
| CN108362002A (en) * | 2018-03-05 | 2018-08-03 | 王冀军 | A kind of solar water heater of disturbance heating |
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| JPS5765546A (en) * | 1981-05-01 | 1982-04-21 | Showa Alum Corp | Solar heat collecting plate |
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| CN102650469A (en) * | 2012-04-26 | 2012-08-29 | 宜兴市华瑞铸造材料有限公司 | Novel silicon carbide foam ceramic solar energy air heat absorber |
| CN104061690A (en) * | 2014-07-01 | 2014-09-24 | 福建工程学院 | Solar energy heat absorber with increased dielectric absorption coefficient gradient |
| CN104534689A (en) * | 2014-12-31 | 2015-04-22 | 赵国平 | Solar energy vacuum tube airy heat collector with flow deflectors and heat collecting method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5852933A (en) * | 1981-09-25 | 1983-03-29 | Asahi Glass Co Ltd | Improved vacuum double glass tube type collector |
| CN2845432Y (en) * | 2005-10-27 | 2006-12-13 | 上海海事大学 | Porous medium solar energy heat collecting combined wall |
| CN101779818B (en) * | 2009-06-09 | 2012-08-15 | 上海海事大学 | Porous medium heat collection combined solar chimney food drier |
| CN205980380U (en) * | 2016-08-04 | 2017-02-22 | 福建工程学院 | Air vacuum tube solar heating element |
-
2016
- 2016-08-04 CN CN201610633557.8A patent/CN106091415B/en not_active Expired - Fee Related
- 2016-08-04 CN CN201711331200.5A patent/CN108266901A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5765546A (en) * | 1981-05-01 | 1982-04-21 | Showa Alum Corp | Solar heat collecting plate |
| CN2202891Y (en) * | 1994-04-04 | 1995-07-05 | 许清波 | Solar energy water heater of normal glass tube |
| CN1598439A (en) * | 2004-07-28 | 2005-03-23 | 张新君 | Solar energy circulating air heater |
| CN101122425A (en) * | 2007-05-10 | 2008-02-13 | 中国科学院电工研究所 | Silicon carbide foam ceramic solar energy air heat-absorbing device |
| CN101846404A (en) * | 2010-05-27 | 2010-09-29 | 北京工业大学 | Porous material solar energy air heat-collecting device |
| CN201866958U (en) * | 2010-06-25 | 2011-06-15 | 河海大学 | Solar porous medium air heater and detection system |
| CN102650469A (en) * | 2012-04-26 | 2012-08-29 | 宜兴市华瑞铸造材料有限公司 | Novel silicon carbide foam ceramic solar energy air heat absorber |
| CN104061690A (en) * | 2014-07-01 | 2014-09-24 | 福建工程学院 | Solar energy heat absorber with increased dielectric absorption coefficient gradient |
| CN104534689A (en) * | 2014-12-31 | 2015-04-22 | 赵国平 | Solar energy vacuum tube airy heat collector with flow deflectors and heat collecting method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111561788A (en) * | 2019-02-14 | 2020-08-21 | 浙江大学 | Solar gas heat absorption device and working method thereof |
| CN111561788B (en) * | 2019-02-14 | 2024-05-07 | 浙江大学 | Solar gas heat absorber and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106091415A (en) | 2016-11-09 |
| CN106091415B (en) | 2018-04-10 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180710 |