CN205980380U - Air vacuum tube solar heating element - Google Patents
Air vacuum tube solar heating element Download PDFInfo
- Publication number
- CN205980380U CN205980380U CN201620841808.7U CN201620841808U CN205980380U CN 205980380 U CN205980380 U CN 205980380U CN 201620841808 U CN201620841808 U CN 201620841808U CN 205980380 U CN205980380 U CN 205980380U
- Authority
- CN
- China
- Prior art keywords
- air
- vacuum tube
- glass
- delivery line
- porous media
- 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.)
- Withdrawn - After Issue
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Classifications
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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
Abstract
The utility model discloses an air vacuum tube solar heating element, including the glass vacuum tube, its characterized in that, the inside center department of glass vacuum tube is equipped with the porous medium post, and the outside parcel of porous medium post has translucent skeleton porous medium, the opening part of glass vacuum tube is firmly sealed by the sealing washer, is equipped with air induction pipe and air contact tube on the sealing washer. Compared with the prior art, the utility model discloses realize the air etc. Difference in temperature heat transfer, heat transmission effect is good. The coefficient of convective heat transfer of solid skeleton and air is high, is hundreds and thousands of times of pipe heat exchange coefficient. The hot conversion efficiency of whole of device is high. The utility model discloses there is not the solar energy coating, the good reliability of system.
Description
Technical field
This utility model belongs to heat energy utilization field, particularly to a kind of air vacuum tube solar thermal collector.
Background technology：
With the continuous popularization of green building, building energy conservation, the development and utilization of solar thermal collector is increasingly subject to 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
Relatively low in solar energy current density ratio, in practical application, common some 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 adopts interpolation pipe frame mode, and air flows into vacuum tube from interpolation pipe, from glass-vacuum tube with interpolation pipe gap
Flow out, absorb interpolation tube wall heat and inner layer glass tube wall heat, temperature raises, finally flow out glass tube with vacuum.
Because air is gas, relatively low with the convection heat transfer intensity ratio of tube wall, lead to air and interpolation pipe and glass tubing
Convective Heat Transfer is poor, and the thermal efficiency ratio of system is relatively low.Simultaneously because the Convective Heat Transfer ratio to vacuum glass for the air
Poor, the temperature of glass tubing is higher, the easy ageing failure of sun light coating on glass tubing, the use longevity of impact heat collector
Life.
This utility model absorbs from solar energy highly effective strengthens heat convection angle with air, proposes one kind and fills semi-transparent shark bone
The air vacuum tube solar thermal collector device of frame porous media.The convection current of one, this device air and solar energy heat absorbing face is changed
Hot property is high, and the thermal efficiency is high；Two, heat-absorbent surface does not need sunlight coating, system long service life, cost yet relative moderate.
The patent of Application No. 2014100208847 discloses a kind of full glass shell-and-tube solar energy vacuum tube heat collector,
It include 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 constitute thermodynamic medium the chamber that is heated, thermodynamic medium heat cycles, glass tubing simultaneously in glass shell cavity
Shell cavity is also flow channel and the flow pass of thermodynamic medium, is provided with least two perforates in the right-hand member of antisolar glass pipe；?
The right output port of inner glass tube is provided with a silica gel plug.
The patent of Application No. 2014100126014 discloses the vacuum tube heat collection function of a kind of high-effective concentration and passive protection
Device, including union pipe, multiple vacuum tube and base frame, each vacuum tube two ends is provided with ring-shaped guide rail, and this ring-shaped guide rail is solid
On union pipe and base frame, outside vacuum tube, it is provided with condenser groove, helical gear and runner difference are passed through in this condenser groove two ends
It is connected so that condenser groove rotates around vacuum tube axis line with ring-shaped guide rail, the screw rod being also meshed on helical gear.Optically focused
Groove effectively can be collected to the sunlight of oblique incidence it is not necessary to tracking position of sun just can reach higher optically focused at any time
Than.
But existing vacuum tube collector patent thinking is concentrated mainly on flowing and heat absorption mode and the condenser of fluid
Design aspect, lack for the gaseous exchange coefficient of heat transfer than relatively low and utility model that propose efficient heat transfer mode.This practicality
New proposition is a kind of to absorb heat surface sunlight absorption efficiency by raising and optimizes air flow thus improving whole collector efficiency
Filling translucent skeletal porous medium air vacuum tube solar thermal collector scheme.
The solar absorption process of heat-absorbent surface and cross-ventilation endothermic process 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 optimal
Join, be the key improving the air vacuum tube heat collector thermal efficiency.The design of current air vacuum tube heat collector to this two
The specific aim analysis design of individual process is not enough, leads to air vacuum tube heat collector to exist clearly disadvantageous：
1) solar absorption of current vacuum collector is mainly by inner tube outer surface coating or the heat absorption of glass evacuated sleeve pipe
Sun light coating on fin completes.Coating heat absorption is a kind of surface-type absorption process, and solar energy concentrates in coating, easily
Cause coating high-temp aging, affect heat collector service life.
2) air vacuum tube heat collector is mainly interpolation tubular construction, and air enters vacuum tube by interpolation pipe, and glass evacuated
Pipe heat convection, heat absorption heat up, and finally flow out glass-vacuum tube.Right due to air and interpolation tube wall or glass evacuated tube wall
Stream heat exchange property is weaker, leads to the thermal efficiency ratio of system relatively low.
For the air vacuum tube heat collector thermal efficiency is high, sunlight heat absorbing coating because temperature is high aging fast not
Foot, the utility model proposes fill the air vacuum tube solar thermal collector of translucent skeletal porous medium.This heat collector thermal effect
Rate is high, long service life, has good popularization and engineering application value.
Utility model content：
For solving the problems, such as current solar thermal collector, the utility model discloses a kind of air vacuum tube solar
Heat collector.
This utility model employs the following technical solutions realization：
A kind of air vacuum tube solar thermal collector, including glass-vacuum tube, sets at described glass-vacuum tube inside center
There is porous media post, the outer wrap of porous media post has translucent skeletal porous medium；By close at the opening of glass-vacuum tube
Seal seals up, and sealing ring is provided with air leading-in conduit and air delivery line.
Further improvement, the closing of described glass-vacuum tube one end, the opening of the other end is sealed up by sealing ring；Air is led
Enter the edge that pipe is located at sealing ring, air delivery line is located at sealing ring center, air delivery line inserts porous media post；Air
Delivery line be located at porous media post within partly on be evenly distributed with pore；It is provided with support chip, support chip is solid in glass-vacuum tube
Surely live air delivery line.
Further improvement, described air delivery line is stainless steel tube, copper tube or aluminum pipe.Further improvement, described
Air vent aperture is 1～3mm, pore lopping distribution on air delivery line, often encloses 4～6, arranges 20～30 along tube axial direction
Circle.
Further improvement, the two ends of described glass-vacuum tube are all sealed up by sealing ring；Wherein on the sealing ring of one end
It is provided with air leading-in conduit, the sealing ring of the other end is provided with air delivery line.
Further improvement, described porous media post is foamed aluminium porous media post or sic foam porous media post；
Described translucent skeletal porous medium is quartz glass or boron glass.
Compared with prior art, this utility model has thermal efficiency height, two advantages of good reliability：
1) sunlight penetrating glass-vacuum tube sequentially passes through translucent skeletal porous medium and general porous media, due to
Translucent skeletal porous medium is little to the sun absorption coefficient of light, and the absorptance 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, and that is, along air-flow direction, the temperature of heat absorption wall gradually rises, realize air etc. temperature difference heat exchange, heat-transfer effect
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) this utility model does not have solar energy coating, the mechanics of porous media material and thermal property good, the reliability of system
Property is good.
Brief description
Fig. 1 is existing inner-intubation vacuum tube collector structural representation；
Fig. 2 is the structural representation of embodiment 1；
Fig. 3 is the Section A-A figure in Fig. 2；
Fig. 4 is the structural representation of embodiment 2.
Specific embodiment：
Describe in detail by the following examples or description this utility model, rather than this utility model is limited.
Embodiment 1：
(in figure dotted arrow represents air circulation direction) as shown in Figures 2 and 3, a kind of air vacuum tube solar collection
Hot device, including glass-vacuum tube 1, is provided with porous media post 3, outside porous media post 3 at described glass-vacuum tube 1 inside center
Portion is enclosed with translucent skeletal porous medium 4.The closing of described glass-vacuum tube 1 one end, the opening of the other end is sealed by sealing ring 2
Live；Air leading-in conduit 5 is located at the edge of sealing ring 2, and air delivery line 6 is located at sealing ring 2 center, and air delivery line 6 inserts
Porous media post 5；Air delivery line 6 be located at porous media post 5 within partly on be evenly distributed with pore 8；In glass-vacuum tube
It is provided with support chip 7, air delivery line 6 fixed by support chip 7.Air delivery line 6 is stainless steel tube, copper tube or aluminum pipe.Described
Pore 8 aperture be 1～3mm, pore 8 on air delivery line 6 lopping distribution, often enclose 4～6, along tube axial direction arrangement 20～
30 circles.Described porous media post 3 is foamed aluminium porous media post or sic foam porous media post；Described translucent skeleton is many
Hole medium 4 is quartz glass or boron glass.
During heat collector work, incident sunlight passes through glass-vacuum tube 1, enters inner layer glass tube chamber and passes to tube axial direction
Broadcast, when sunlight passes through translucent skeletal porous medium 4, part sunlight is absorbed, and remaining sunlight continues to forward pass
Broadcast, when sunlight passes through porous media post 3, all absorbed.Sun light absorbs system due to translucent skeletal porous medium 4
Number is smaller, and the sun absorption coefficient of light of porous media post 3 is bigger, so most of sunlight is by vacuum tube central area
Porous media post 3 absorb, the temperature of porous media post 3 is high, and translucent skeletal porous medium 4 temperature of outer rim is compared with porous media
Post 3 low.
On the other hand, Cryogenic air from air leading-in conduit 5 enter vacuum tube cavity, first with glass-vacuum tube 1 in
Tube wall heat convection, pre-heating temperature elevation.Then in differential pressure action, sequentially pass through translucent skeletal porous medium 4 along caliber direction
With porous media post 3, heat absorption heat up, converge in air delivery line 6 then across the pore 8 on air delivery line 6, finally from
Air delivery line 6 outlet is flowed out.
The sun optical transport absorption direction of the present embodiment heat collector is consistent with the flowing heat absorption direction of air, achievable isothermal
Difference heat exchange, heat-transfer effect is best, thermal efficiency highest.
Embodiment 2：
(in figure dotted arrow represents air circulation direction) as shown in Figure 4, a kind of air vacuum tube solar thermal collector,
Including glass-vacuum tube 1, at described glass-vacuum tube 1 inside center, it is provided with porous media post 3, the outside bag of porous media post 3
It is wrapped with translucent skeletal porous medium 4.The two ends of described glass-vacuum tube 1 are all sealed up by sealing ring 2；The sealing of wherein one end
Circle 2 is provided with air leading-in conduit 5, and the sealing ring 2 of the other end is provided with air delivery line 6.Described porous media post 3 is foamed aluminium
Porous media post or sic foam porous media post；Described 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 cannot realize absorbing heat along air-flow direction
The temperature of wall gradually rises, the temperature difference heat exchange such as realization, the thermal efficiency of impact system.
Claims (6)
1. a kind of air vacuum tube solar thermal collector, including glass-vacuum tube it is characterised in that inside described glass-vacuum tube
Center is provided with porous media post, and the outer wrap of porous media post has translucent skeletal porous medium；The opening of glass-vacuum tube
Sealed up by sealing ring at mouthful, sealing ring is provided with air leading-in conduit and air delivery line.
2. as claimed in claim 1 a kind of air vacuum tube solar thermal collector it is characterised in that described glass-vacuum tube one
End seal is closed, and the opening of the other end is sealed up by sealing ring；Air leading-in conduit is located at the edge of sealing ring, and air delivery line is located at close
Seal center, air delivery line inserts porous media post；Air delivery line is located at partly going up uniformly within porous media post
It is furnished with pore；It is provided with support chip, air delivery line fixed by support chip in glass-vacuum tube.
3. as claimed in claim 2 a kind of air vacuum tube solar thermal collector it is characterised in that described air delivery line is
Stainless steel tube, copper tube or aluminum pipe.
4. as claimed in claim 2 a kind of air vacuum tube solar thermal collector it is characterised in that described air vent aperture be 1
～3mm, pore lopping distribution on air delivery line, often enclose 4～6, along tube axial direction arrangement 20～30 circle.
5. as claimed in claim 1 a kind of air vacuum tube solar thermal collector it is characterised in that described glass-vacuum tube
Two ends are all sealed up by sealing ring；The sealing ring of wherein one end is provided with air leading-in conduit, and the sealing ring of the other end is provided with sky
Gas delivery line.
6. described a kind of air vacuum tube solar thermal collector as arbitrary in claim 1-5 is it is characterised in that described porous is situated between
Matter post is foamed aluminium porous media post or sic foam porous media post；Described translucent skeletal porous medium is quartz glass
Or boron glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620841808.7U CN205980380U (en) | 2016-08-04 | 2016-08-04 | Air vacuum tube solar heating element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620841808.7U CN205980380U (en) | 2016-08-04 | 2016-08-04 | Air vacuum tube solar heating element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205980380U true CN205980380U (en) | 2017-02-22 |
Family
ID=58030084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620841808.7U Withdrawn - After Issue CN205980380U (en) | 2016-08-04 | 2016-08-04 | Air vacuum tube solar heating element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205980380U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106091415A (en) * | 2016-08-04 | 2016-11-09 | 福建工程学院 | A kind of air vacuum tube solar thermal collector |
-
2016
- 2016-08-04 CN CN201620841808.7U patent/CN205980380U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106091415A (en) * | 2016-08-04 | 2016-11-09 | 福建工程学院 | A kind of air vacuum tube solar thermal collector |
| CN106091415B (en) * | 2016-08-04 | 2018-04-10 | 福建工程学院 | A kind of air vacuum tube solar thermal collector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170222 Effective date of abandoning: 20180410 |