CN101240945A - Self-focusing type straight-through vacuum heat collection device - Google Patents

Self-focusing type straight-through vacuum heat collection device Download PDF

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Publication number
CN101240945A
CN101240945A CNA2008100093424A CN200810009342A CN101240945A CN 101240945 A CN101240945 A CN 101240945A CN A2008100093424 A CNA2008100093424 A CN A2008100093424A CN 200810009342 A CN200810009342 A CN 200810009342A CN 101240945 A CN101240945 A CN 101240945A
Authority
CN
China
Prior art keywords
glass tube
tube
vacuum heat
heat collection
optically focused
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
Application number
CNA2008100093424A
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Chinese (zh)
Inventor
王军
张耀明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southeast University
Original Assignee
Southeast University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to CN200720045259 priority Critical
Priority to CN200720045259.3 priority
Application filed by Southeast University filed Critical Southeast University
Priority to CNA2008100093424A priority patent/CN101240945A/en
Publication of CN101240945A publication Critical patent/CN101240945A/en
Pending legal-status Critical Current

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Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy, e.g. solar towers
    • Y02E10/44Heat exchange systems

Abstract

The present invention provides a focused straight vacuum heat collector, belonging to solar energy utilizing field. The heat collector includes a transparent glass tube and an absorption tube therein, the surface of the absorption tube is coated with absorbing solar energy coating, the glass tube and the absorption tube are vacuum, the improved features is that the glass tube far from the part surface of the solar light ray incidence is coated with reflecting materia, forming photospot surface, the absorption tube is mounted on the optical belt of the photospot surface. Since reasonably utilizing glass tube forming reflecting surface, the glass tube and the reflecting surface are subtly combined, this need not set optical plate in the glass tube, the heat collector simplifies structure, reduces groove processing precision requirement of the optical device, enhances optical ratio of the system, fits for mass industrial production, and safety, credible, lower cost and wide application.

Description

Self-focusing type straight-through vacuum heat collection device
Technical field
The present invention relates to a kind of solar energy heating device, especially a kind of straight-through vacuum heat collection device belongs to the solar energy utilization technique field.
Background technology
Understand according to the applicant, present domestic straight-through type solar energy vacuum heat collecting tube generally adopts and covers solar energy absorbing coating on the metal tube and make, and the metal tube outer casing glass tube vacuumizes between glass tube and metal tube, adopts the kovar alloy sealing-in between the two.In order to compensate the swell increment of intensification back glass tube, on the glass tube of being everlasting expansion joint is installed less than metal tube.
Retrieval is found, the patent No. is ZL200620075347.3, the applying date to be that the utility model on July 25th, 2006 discloses a kind of outer expanded-type solar vacuum heat-collecting pipe, mainly constitute by expansion joint, kovar alloy, glass tube, vacuum layer, metal tube, absorption sunshine coating, hold-down support, protective cover, flange etc., the sealing-in mode adopts the sealing by fusing structure, is applicable to trough type solar power generation.But this pipe is very high for the required precision of concentrator, and glass tube and reflector are separated from each other, and the solar energy density of its reception and the ratio of the solar energy density of optically focused not are the optically focused ratio of slot-type optical collector.
Summary of the invention
The objective of the invention is to: the shortcoming at above prior art exists, propose a kind of self-focusing type straight-through vacuum heat collection device, thereby, reduce the requirement on machining accuracy of slot-type optical collector with the structure of advantages of simple, improve the optically focused ratio of system.
In order to reach above purpose, self-focusing type straight-through vacuum heat collection device of the present invention comprises transparent glass tube and the absorption tube that is positioned at wherein, described absorption tube surface scribbles and absorbs the sunshine coating, form vacuum between described glass tube and the absorption tube, its improvements are: described glass tube scribbles reflectorized material away from the part surface of sunray incident, form the optically focused reflective surface, described absorption tube is placed on the optically focused band of described optically focused reflective surface.
During work, sunray is radiated on the self-focusing type straight-through vacuum thermal-collecting tube, see through the vacuum between glass tube and metal tube, shine on the optically focused reflective surface, after the reflective surface reflection, be radiated at the sunshine absorber coatings on absorption tube surface, the sunshine absorber coatings absorbs working medium in the heated absorption tube of back, realizes required power conversion and output.
Advantage of the present invention is, owing to rationally utilize glass tube self to form reflective surface, ingenious glass tube and reflective surface are united two into one, therefore need not in glass tube, to be provided with in addition solar panel, simplify the structure, can reduce the requirement on machining accuracy of slot-type optical collector, the optically focused ratio of raising system is convenient to large-scale industrial production, and safety, reliable, cost is low, easily promotes.
Description of drawings
The present invention is further illustrated below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of the embodiment of the invention one.
Fig. 2 is the A-A cross section structure schematic diagram of Fig. 1.
Fig. 3 is the cross section structure schematic diagram of the embodiment of the invention two.
Fig. 4 is the structural section schematic diagram of the embodiment of the invention three.
Among the figure 1 is expansion joint, the 2nd, transition material, the 3rd, and glass tube, the 4th, vacuum, the 5th, absorption tube, the 6th absorbs sunshine coating, the 7th, protective cover, the 8th, reflectorized material, the 9th, getter, the 10th, hold-down support.
The specific embodiment
Embodiment one
Present embodiment is a kind of self-focusing type straight-through vacuum thermal-collecting tube, and as depicted in figs. 1 and 2, transparent glass tube 3 is made the caustic surface that the cross section is a curve away from the part of sunray incident, and its surface scribbles reflectorized material 8, forms the optically focused reflective surface.See by the cross section, the optically focused reflective surface left-right symmetry of both sides, forming the compound parabolic that intersects crest line near the absorption tube bottom, absorption tube 5 is placed on the optically focused band of optically focused reflective surface by hold-down support 10, form vacuum 4 between glass tube 3 and the absorption tube 5, and placement getter 9, with vacuum certain in the holding tube, absorption tube 5 surfaces scribble and absorb sunshine coating 6, absorption tube 5 adopts expansion joint 1 transition to be connected with 3 of glass tubes, poor with the swell increment that compensation heats up between back glass tube 3 and the absorption tube 5, add on absorption tube 5 fixedly that bearing 10 plays a supportive role, to prevent sunray direct irradiation interface.
Embodiment two
Present embodiment basic structure is identical with embodiment one, and as shown in Figure 3, characteristics are that the tortuous position of W type is made in the bottom of glass tube 3, and the cross section curve of optically focused reflective surface is the compound parabolic that contains W type complications, and spotlight effect is better like this.
Embodiment three:
Present embodiment basic structure is identical with embodiment one, and as shown in Figure 4, characteristics are that the bottom of glass tube 3 is continuous parabola, and promptly the cross section curve of optically focused reflective surface is continuous parabola, and the anufacturability of caustic surface is better like this.
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.

Claims (9)

1, a kind of self-focusing type straight-through vacuum heat collection device, comprise transparent glass tube and the absorption tube that is positioned at wherein, described absorption tube surface scribbles and absorbs the sunshine coating, form vacuum between described glass tube and the absorption tube, it is characterized in that: described glass tube scribbles reflectorized material away from the part surface of sunray incident, form the optically focused reflective surface, described absorption tube is placed on the optically focused band of described optically focused reflective surface.
2, according to the described self-focusing type straight-through vacuum heat collection device of claim 1, it is characterized in that: described transparent glass tube is made the optically focused reflective surface that the cross section is a curve away from the part of sunray incident.
3, according to the described self-focusing type straight-through vacuum heat collection device of claim 2, it is characterized in that: described optically focused reflective surface cross section is symmetrical compound parabolic, is forming crossing crest line near the absorption tube bottom.
4, according to the described self-focusing type straight-through vacuum heat collection device of claim 2, it is characterized in that: the cross section curve of described optically focused reflective surface is the compound parabolic that contains W type complications.
5, according to the described self-focusing type straight-through vacuum heat collection device of claim 2, it is characterized in that: the cross section curve of described optically focused reflective surface is continuous parabola.
6, according to claim 3,4 or 5 described self-focusing type straight-through vacuum heat collection devices, it is characterized in that: described absorption tube is placed on the optically focused band of optically focused reflective surface by hold-down support.
7, according to the described self-focusing type straight-through vacuum heat collection device of claim 6, it is characterized in that: adopt the expansion joint transition to be connected between described absorption tube and glass tube.
8, according to the described self-focusing type straight-through vacuum heat collection device of claim 7, it is characterized in that: place getter between described glass tube and the absorption tube.
9, described according to Claim 8 self-focusing type straight-through vacuum heat collection device is characterized in that: described absorption tube and glass tube sealing-in place add protective cover.
CNA2008100093424A 2007-08-27 2008-02-25 Self-focusing type straight-through vacuum heat collection device Pending CN101240945A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN200720045259 2007-08-27
CN200720045259.3 2007-08-27
CNA2008100093424A CN101240945A (en) 2007-08-27 2008-02-25 Self-focusing type straight-through vacuum heat collection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100093424A CN101240945A (en) 2007-08-27 2008-02-25 Self-focusing type straight-through vacuum heat collection device

Publications (1)

Publication Number Publication Date
CN101240945A true CN101240945A (en) 2008-08-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2008100093424A Pending CN101240945A (en) 2007-08-27 2008-02-25 Self-focusing type straight-through vacuum heat collection device

Country Status (1)

Country Link
CN (1) CN101240945A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101776329A (en) * 2010-02-10 2010-07-14 无锡意凯顺得科技有限公司 Flat-plate paraboloidal solar light-condensing and heat-collecting device
CN106839473A (en) * 2017-04-01 2017-06-13 东南大学 A kind of vacuum heat collection pipe
WO2021184204A1 (en) * 2020-03-15 2021-09-23 南京索乐优节能科技有限公司 Inflatable cpc heat collector device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101776329A (en) * 2010-02-10 2010-07-14 无锡意凯顺得科技有限公司 Flat-plate paraboloidal solar light-condensing and heat-collecting device
CN101776329B (en) * 2010-02-10 2011-09-14 无锡中阳新能源科技有限公司 Flat-plate paraboloidal solar light-condensing and heat-collecting device
CN106839473A (en) * 2017-04-01 2017-06-13 东南大学 A kind of vacuum heat collection pipe
WO2021184204A1 (en) * 2020-03-15 2021-09-23 南京索乐优节能科技有限公司 Inflatable cpc heat collector device

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Open date: 20080813