CN202757323U - Solar vacuum heat collecting pipe using inner threaded pipe as heat absorbing pipe - Google Patents
Solar vacuum heat collecting pipe using inner threaded pipe as heat absorbing pipe Download PDFInfo
- Publication number
- CN202757323U CN202757323U CN 201220435349 CN201220435349U CN202757323U CN 202757323 U CN202757323 U CN 202757323U CN 201220435349 CN201220435349 CN 201220435349 CN 201220435349 U CN201220435349 U CN 201220435349U CN 202757323 U CN202757323 U CN 202757323U
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- China
- Prior art keywords
- tube
- pipe
- solar vacuum
- vacuum heat
- collecting pipe
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- Expired - Fee Related
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Treatment Of Liquids With Adsorbents In General (AREA)
Abstract
The utility model provides a solar vacuum heat collecting pipe using an inner threaded pipe as a heat absorbing pipe. The solar vacuum heat collecting pipe comprises a glass pipe and the heat absorbing pipe which are arranged coaxially. The heat absorbing pipe is arranged inside the glass pipe, and an interlayer between the heat absorbing pipe and the glass pipe is a vacuum interlayer. The heat absorbing pipe is the inner threaded pipe. By means of the solar vacuum heat collecting pipe, contact area between a heat absorbing pipe inner wall and heat transferring fluid is increased by using the inner threaded pipe, and peripheral temperature of the output heat transferring fluid is even through a flow disturbance effect of inner threads, so that use safety and heat collecting efficiency of the solar vacuum heat collecting pipe are improved, and the solar vacuum heat collecting pipe has the advantages of being simple in structure and low in cost.
Description
Technical field
The utility model relates to a kind of solar vacuum heat-collecting pipe, is specifically related to a kind of riffled tube that uses as the solar vacuum heat-collecting pipe of endothermic tube.
Background technology
Along with increasingly sharpening of the lasting in short supply and climate warming of global energy, it is more and more important that the development and use of regenerative resource have become, and wherein, solar energy is pollution-free owing to having, inexhaustible and with low cost etc., and advantage has broad application prospects.
In solar energy utilized, solar energy heat collection pipe was parts relatively more commonly used at present, and its primary structure feature comprises glass tube and the endothermic tube that concentric arranges, and wherein, endothermic tube is arranged on the inside of glass tube; Endothermic tube is the endothermic tube that outer surface is coated with absorbing film; And the interlayer between endothermic tube and the glass tube is pumped into the high vacuum structure.Its operation principle is: heat-transfer fluid flows in the pipe of endothermic tube, solar energy sees through the outer surface that outside glass tube shines endothermic tube, the absorbing film that the endothermic tube outer surface applies absorbs solar energy, and the solar energy that absorbs is converted to heat energy, then heats the heat-transfer fluid in the endothermic tube.By this process, realized solar energy is converted to the effect of the heat energy of heat-transfer fluid.Because the interlayer between endothermic tube and the glass tube is vacuum, thereby effectively reduce the towards periphery lost heat loss of environment of endothermic tube, improved collecting efficiency.
But, in realizing process of the present utility model, inventor's discovery, there is following defective at least in prior art:
Because endothermic tube is the common stainless steel pipe of inner wall smooth, so, the heat-transfer fluid of solar thermal collector output has the problem of circumferential non-uniform temperature, and is lower in the heat-transfer fluid temperature near the endothermic tube axle center, and higher in the temperature near the heat-transfer fluid of endothermic tube inside pipe wall; Especially when heat-transfer fluid adopted conduction oil, because conduction oil has the restriction of the highest oil film temperature, wherein, oil film referred to one deck conduction oil near the endothermic tube inside pipe wall; And conduction oil is in the restriction that is very easy to exceed the highest oil film temperature near the local temperature of endothermic tube inside pipe wall, and then reduced safety in utilization and the serviceability of solar energy heat collection pipe.And still there is the not high problem of solar energy utilization ratio in existing solar thermal collector.
The utility model content
For the defective that prior art exists, the utility model provides a kind of riffled tube that uses as the solar vacuum heat-collecting pipe of endothermic tube, has the uniform advantage of the circumferential temperature of heat-transfer fluid of output, has advantages of that also collecting efficiency is high and simple in structure.
The technical solution adopted in the utility model is as follows:
The utility model provides a kind of riffled tube that uses as the solar vacuum heat-collecting pipe of endothermic tube, comprise glass tube and endothermic tube that concentric arranges, described endothermic tube is arranged on the inside of described glass tube, and the interlayer between described endothermic tube and the described glass tube is vacuum; Described endothermic tube is riffled tube.
Preferably, the pitch of the internal thread of described riffled tube is the 5-20 millimeter.
Preferably, the tooth depth of the internal thread of described riffled tube is the 0.05-10 millimeter.
Preferably, the tooth root width of the internal thread of described riffled tube is greater than addendum width.
Preferably, described tooth root width is 10 with the ratio of described addendum width: 1-2: 1.
Preferably, the cross section of described tooth top is circular arc or straight line.
Preferably, the arc length of described circular arc is the 1-5 millimeter, and the radius of described circular arc is the 1-5 millimeter.
Preferably, the outer surface of described endothermic tube is coated with absorption film.
Preferably, the interlayer between described endothermic tube and described glass tube is placed getter.
The beneficial effects of the utility model are as follows:
The use riffled tube that the utility model provides is as the solar vacuum heat-collecting pipe of endothermic tube, by using riffled tube to increase the contact area of endothermic tube inwall and heat-transfer fluid, and make the circumferential temperature of heat-transfer fluid of output even by the flow-disturbing effect of internal thread, thereby improved safety in utilization and the collecting efficiency of solar vacuum heat-collecting pipe, also had advantages of simple in structure low with cost.
Description of drawings
The use riffled tube that Fig. 1 provides for the utility model is as the structural representation of the solar vacuum heat-collecting pipe of endothermic tube;
Fig. 2 is that Fig. 1 is along the profile of A-A;
Wherein, 1---heat-transfer fluid; The 2---endothermic tube; The 3---glass tube.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated:
As depicted in figs. 1 and 2, the utility model provides a kind of riffled tube that uses as the solar vacuum heat-collecting pipe of endothermic tube, comprise glass tube and endothermic tube that concentric arranges, described endothermic tube is arranged on the inside of described glass tube, and the interlayer between described endothermic tube and the described glass tube is vacuum; And described endothermic tube is riffled tube.Wherein, the outer surface of endothermic tube is coated with absorption film, and the interlayer between endothermic tube and glass tube can be placed getter.
The inventor has carried out many experiments to the various parameters of the internal thread in the endothermic tube, proof is when the specifications parameter of internal thread meets following the requirement, and can effectively improve the heat exchange coefficient of solar vacuum heat-collecting pipe: the pitch of the internal thread of riffled tube is the 5-20 millimeter; The tooth depth of internal thread is the 0.05-10 millimeter.And the tooth root width of the internal thread of riffled tube is greater than addendum width, and the tooth root width is 10 with the ratio of addendum width: 1-2: 1; The cross section of tooth top can be circular arc or straight line, and when the tooth top cross section was circular arc, the arc length of circular arc was the 1-5 millimeter, and the radius of circular arc is the 1-5 millimeter.
Therefore, when heat-transfer fluid flows in endothermic tube, by using riffled tube to increase the contact area of endothermic tube inwall and heat-transfer fluid, and make the circumferential temperature of heat-transfer fluid of output even by the flow-disturbing effect of internal thread, thereby improved safety in utilization and the collecting efficiency of solar vacuum heat-collecting pipe, also had advantages of simple in structure low with cost.
The above only is preferred embodiment of the present utility model; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be looked protection domain of the present utility model.
Claims (9)
1. one kind is used riffled tube as the solar vacuum heat-collecting pipe of endothermic tube, comprises glass tube and endothermic tube that concentric arranges, and described endothermic tube is arranged on the inside of described glass tube, and the interlayer between described endothermic tube and the described glass tube is vacuum; It is characterized in that, described endothermic tube is riffled tube.
2. use riffled tube according to claim 1 is characterized in that as the solar vacuum heat-collecting pipe of endothermic tube, and the pitch of the internal thread of described riffled tube is the 5-20 millimeter.
3. use riffled tube according to claim 1 is characterized in that as the solar vacuum heat-collecting pipe of endothermic tube, and the tooth depth of the internal thread of described riffled tube is the 0.05-10 millimeter.
4. use riffled tube according to claim 1 is characterized in that as the solar vacuum heat-collecting pipe of endothermic tube, and the tooth root width of the internal thread of described riffled tube is greater than addendum width.
5. use riffled tube according to claim 4 is characterized in that as the solar vacuum heat-collecting pipe of endothermic tube, and described tooth root width is 10 with the ratio of described addendum width: 1-2: 1.
6. use riffled tube according to claim 4 is characterized in that as the solar vacuum heat-collecting pipe of endothermic tube, and the cross section of described tooth top is circular arc or straight line.
7. use riffled tube according to claim 6 is characterized in that as the solar vacuum heat-collecting pipe of endothermic tube, and the arc length of described circular arc is the 1-5 millimeter, and the radius of described circular arc is the 1-5 millimeter.
8. use riffled tube according to claim 1 is characterized in that as the solar vacuum heat-collecting pipe of endothermic tube, and the outer surface of described endothermic tube is coated with absorption film.
9. use riffled tube according to claim 1 is characterized in that as the solar vacuum heat-collecting pipe of endothermic tube, and the interlayer between described endothermic tube and described glass tube is placed getter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435349 CN202757323U (en) | 2012-08-29 | 2012-08-29 | Solar vacuum heat collecting pipe using inner threaded pipe as heat absorbing pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220435349 CN202757323U (en) | 2012-08-29 | 2012-08-29 | Solar vacuum heat collecting pipe using inner threaded pipe as heat absorbing pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202757323U true CN202757323U (en) | 2013-02-27 |
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ID=47736501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220435349 Expired - Fee Related CN202757323U (en) | 2012-08-29 | 2012-08-29 | Solar vacuum heat collecting pipe using inner threaded pipe as heat absorbing pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202757323U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629835A (en) * | 2012-08-29 | 2014-03-12 | 中广核太阳能开发有限公司 | Evacuated solar collector tube with rifled tube serving as heat adsorption tube |
| CN106440406B (en) * | 2016-10-28 | 2018-07-17 | 东南大学 | A kind of solar vacuum heat-collecting pipe of double expansion joints |
-
2012
- 2012-08-29 CN CN 201220435349 patent/CN202757323U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629835A (en) * | 2012-08-29 | 2014-03-12 | 中广核太阳能开发有限公司 | Evacuated solar collector tube with rifled tube serving as heat adsorption tube |
| CN103629835B (en) * | 2012-08-29 | 2015-12-02 | 中广核太阳能开发有限公司 | Use riffled tube as the solar vacuum heat-collecting pipe of endothermic tube |
| CN106440406B (en) * | 2016-10-28 | 2018-07-17 | 东南大学 | A kind of solar vacuum heat-collecting pipe of double expansion joints |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130227 Termination date: 20170829 |