CN102062479B - Composite paraboloid high temperature thermal collector designed by taking lead as basis - Google Patents

Composite paraboloid high temperature thermal collector designed by taking lead as basis Download PDF

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Publication number
CN102062479B
CN102062479B CN200910238180.6A CN200910238180A CN102062479B CN 102062479 B CN102062479 B CN 102062479B CN 200910238180 A CN200910238180 A CN 200910238180A CN 102062479 B CN102062479 B CN 102062479B
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China
Prior art keywords
internal reflection
support
absorption tube
reflection condenser
heat
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Expired - Fee Related
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CN200910238180.6A
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Chinese (zh)
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CN102062479A (en
Inventor
刘玉卫
熊勇刚
陈洪晶
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Himin Solar Co Ltd
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Himin Solar Co Ltd
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    • 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

Abstract

The invention discloses a composite paraboloid high temperature thermal collector designed by taking lead as basis, comprising an internal reflection condensation mirror, the internal reflection condensation mirror is fixed on an internal reflection condensation mirror support, the internal reflection condensation mirror support is fixed with an absorption tube support, the absorption tube support is fixed with an absorption tube, wherein the mirror surface of the internal reflection condensation mirror is an involute composite paraboloid composed of two symmetrical paraboloids and two involute surfaces symmetrical to the focal line of the paraboloids. By adopting the structure of the invention, convection can not be produced between the air in the thermal collector and outside air, thus avoiding convection loss of the system. By adopting the invention, higher condensation ratio and larger receiving angle are realized in high-angle range, cost is low, operation is easy; meanwhile, curve moulding accuracy is greatly improved, and condensation and thermal collection effects are good, thus being beneficial to popularization and application of a solar energy medium and high temperature thermal utilization system.

Description

A kind of high temperature heat collector of the composite parabolic based on lead design
Technical field
The invention belongs to solar energy high temperature heat build-up technical field of power generation, relate to solar energy high temperature light-condensing and heat-collecting device, particularly a kind of high temperature heat collector of the composite parabolic based on lead design.
Background technology
At present, the solar energy compound parabolic concentrator generally using is to be all applied in solar low-temperature field, mainly to adopt vacuum tube or heat pipe as absorption tube, its structure design is mainly to accept source of parallel light in a side of concentrator or the light-receiving mouth of a plane of top design, designs relatively simple.But because it is subject to vacuum tube or the little restriction of heat pipe caliber, and light-receiving mouth increases and optically focused reduces to cause the not impact of high problem of light gathering efficiency in polarizers of big angle scope than sharply, and the scope of application is very restricted.
Summary of the invention
The object of the invention is the defect for above-mentioned prior art, a kind of high temperature heat collector that has a kind of composite parabolic based on lead design of larger optically focused ratio and larger receiving angle in polarizers of big angle scope is provided.
The technical scheme that the present invention takes is to achieve these goals: a kind of high temperature heat collector of the composite parabolic based on lead design, comprise internal reflection condenser, described internal reflection condenser is fixed on internal reflection condenser support, fixing absorption tube support on described internal reflection condenser support, is fixed with absorption tube on described absorption tube support; The minute surface of described internal reflection condenser is by two sections of symmetrical parabolas and two sections of involute composite parabolics that form along the involute surface of parabola focal line symmetry.
Fixing heat-insulation layer inner cover on described internal reflection condenser support, is provided with heat-insulation layer and heat-insulation layer outer cover successively above described heat-insulation layer inner cover.
Described internal reflection condenser support below is provided with armorplate glass, is provided with glass plate fixed head below described armorplate glass.
Described absorption tube caliber is 50-100mm, and lead is between 10 °-30 °, and maximum acceptance angle degree is 120 °, and parabolical focus is on the center of circle of absorption tube cross section circle.
Described internal reflection condenser support and glass plate fixed head are bolted in beam base, and described beam base is arranged on base and reinforces in support.
Described internal reflection condenser is made by mirror-reflection aluminium sheet, and inner surface is through anodized, and high temperature resistant impact reaches 300 ℃.
Described internal reflection condenser support is formed by line cutting processing, strengthens fixing between described internal reflection condenser support by steady brace.
Described absorption tube is plated film steel pipe, and caliber is 60-80mm; Described absorption tube support is formed by line cutting processing.
Described heat-insulation layer outer cover is made by stainless steel.
On the both sides of described armorplate glass, glass plate fixed head, be provided with gas permeable carbon felt.
The beneficial effect of the embodiment of the present invention is: compared with prior art, heat collector of the present invention has changed the structure of existing compound parabolic concentrator, and internal reflection condenser is made by mirror-reflection aluminium sheet, and resistance to elevated temperatures is strong, and intensity is high, the mirror curved surface of internal reflection condenser is by two sections of parabolas and two periods of involute surface compound compositions, two sections of paraboloidal focal lines drop on respectively on the plane of symmetry of high-temperature heat-collection pipe inside about its involute surface symmetry, because increased the lead design of two sections of involute surfaces, so the light mouth that connects of concentrating collector has also increased width, thereby the optically focused ratio of concentrator and the receiving angle of light have been increased, can the whole circumference of all light uniform convergences of CPC sensitive surface to high-temperature heat-collection pipe will be incided, make high-temperature heat-collection pipe can farthest accept direct projection part and the dissipative part of light, because increased the lead design of two sections of involute surfaces, also make absorption tube and internal reflection condenser have certain distance, avoided making because absorption tube directly contacts with internal reflection condenser internal reflection condenser minute surface to damage.Absorption tube support is formed by line cutting processing, and machining accuracy is high.Adopt structure of the present invention, heat collector inner air and extraneous air do not produce convection current, the convection losses of having avoided system to produce because of convection current.The present invention is with low cost, easy operating, and curved surface forming precision significantly improves, and light and heat collection effect is high, is conducive to the utilization and extention of moderate-high temperature heat utilization systems in solar energy.
Accompanying drawing explanation
Fig. 1 is the cross sectional representation of the embodiment of the present invention;
Fig. 2 is the side view of the embodiment of the present invention;
Fig. 3 is the reflecting surface of the embodiment of the present invention optically focused index path when 54 ° of incident lights, can show that light gathering efficiency of the present invention is 92.5% from figure.
In figure: 1 base is reinforced and supported, 2 beam base, 3 glass plate fixed heads, 4 internal reflection condenser supports, 5 absorption tube supports, 6 absorption tubes, 7 armorplate glasses, 8 bolts, 9 stay bolts, 10 steady braces, 11 rivets, 12 heat-insulation layer inner covers, 13 heat-insulation layer outer covers, 14 internal reflection condensers, 15 heat-insulation layers, 16 gas permeable carbon felts, 17 lag bolts.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but not as a limitation of the invention.
Referring to Fig. 1 and Fig. 2, a kind of high temperature heat collector of the composite parabolic based on lead design, this heat collector is comprised of concentrating component, thermal-arrest assembly, supporting bracket assembly, heat insulation module, black box, and four parts closely link together by set bolt.Wherein, concentrating component comprises internal reflection condenser 14, internal reflection condenser support 4; Thermal-arrest assembly comprises absorption tube 6 and absorption tube support 5; Supporting bracket assembly comprises beam base 2 and base reinforcing support 1; Heat insulation module comprises heat-insulation layer 15, heat-insulation layer inner cover 12 and heat-insulation layer outer cover 13; Black box comprises armorplate glass 7, glass plate fixed head 3 and gas permeable carbon felt 16.The minute surface of internal reflection condenser 14 is by two sections of symmetrical parabolas and four sections of involute composite parabolics that form along the involute surface of parabola focal line symmetry.Internal reflection condenser 14 and heat-insulation layer inner cover 12 are fixed on internal reflection condenser support 4 by bolt 8, between internal reflection condenser support 4, by steady brace 10, strengthen fixing, and have guaranteed stability and the installation accuracy of internal reflection condenser support 4; Heat-insulation layer inner cover 12 is provided with heat-insulation layer 15 and heat-insulation layer outer cover 13 above successively, heat-insulation layer outer cover 13 is fixed in beam base 2 by rivet 11, internal reflection condenser support 4 belows are provided with armorplate glass 7, armorplate glass 7 is provided with glass plate fixed head 3 below, internal reflection condenser support 4 and glass plate fixed head 3 are fixed in beam base 2 by stay bolt 9, beam base 2 is arranged on base and reinforces in support 1, on the both sides of armorplate glass 7, glass plate fixed head 3, is provided with gas permeable carbon felt 16.Absorption tube support 5 is fixed on internal reflection condenser support 4 by lag bolt 17, and absorption tube 6 is fixed on definite position by absorption tube support 5.There are 2 restrictions the definite position of absorption tube 6: the center of circle of (1) absorption tube 6 cross section circles is determined by lead to the distance on involute summit; (2) the parabolical focus in paraboloidal cross section is on the center of circle of absorption tube 6 cross section circles.Absorption tube 6 is plated film steel pipes, and caliber is 70mm, has avoided the technology of vacuum glass sealing-in, has reduced the manufacturing price of product, and absorption tube support 5 is formed by line cutting processing.Heat collector each several part closely connects, and has formed a semi-enclosed heat-insulation system, and this heat collector inner air and extraneous air do not produce convection current, the convection losses of having avoided system to produce because of convection current.In the present invention, absorption tube caliber is preferably 70mm, lead between 10 °-30 °, 0 °-120 ° of receiving angles, maximum acceptance angle degree is 120 °, parabolical focus is on the center of circle of absorption tube cross section circle.
The present invention is with lead design composite parabolic high temperature heat collector, lead is the title for an angle of the involute of circle, refer to the angle that round involute rotates around the center of circle, 2 parabolas using on concentrator and 2 involute surfaces are by absorption tube, lead and accept angle and limit, need only given absorption tube caliber D, lead and accept angle, just can determine parabola and involute surface.Referring to Fig. 3, the optically focused index path of reflecting surface when 54 ° of incident lights, can show that from figure light gathering efficiency of the present invention is 92.5%.
In embodiments of the invention, internal reflection condenser forms involute composite parabolic by mirror-reflection aluminium sheet, and inner surface is through anodized, and high temperature resistant impact reaches 300 ℃; Internal reflection condenser support is formed by line cutting processing, thereby has guaranteed internal reflection condenser shape contour accuracy, has increased the light gathering efficiency of internal reflection condenser; Heat-insulation layer has completely cut off heat radiation and the cross-ventilation of heat collector upper surface, strengthened heat insulation effect, improved the thermal efficiency of system, heat-insulation layer outer cover is made by stainless steel, strengthen waterproof, anticorrosion and the radiation-resistant ability of device, increased the service life of device.Armorplate glass has been blocked the cross-ventilation heat exchange of heat collector lower surface, has improved the thermal efficiency of system.Use gas permeable carbon felt, when internal pressure is greater than external pressure, start to breathe freely, guaranteed the security of heat collector.
Above-described embodiment, the present invention specific embodiment a kind of more preferably just, the common variation that those skilled in the art carries out within the scope of technical solution of the present invention and replacing all should be included in protection scope of the present invention.

Claims (1)

1. the high temperature heat collector of the composite parabolic based on lead design, it is characterized in that: comprise internal reflection condenser, described internal reflection condenser is fixed on internal reflection condenser support, fixing absorption tube support on described internal reflection condenser support, is fixed with absorption tube on described absorption tube support; The minute surface of described internal reflection condenser is by two sections of symmetrical parabolas and two sections of involute composite parabolics that form along the involute surface of parabola focal line symmetry;
Fixing heat-insulation layer inner cover on described internal reflection condenser support, is provided with heat-insulation layer and heat-insulation layer outer cover successively above described heat-insulation layer inner cover;
Described internal reflection condenser support below is provided with armorplate glass, is provided with glass plate fixed head below described armorplate glass;
Described absorption tube caliber is 50-100mm, the angle that the involute that described lead is circle rotates around the center of circle, described lead is between 10 °-30 °, and the maximum acceptance angle degree of incident light is 120 °, and the parabolical focus in cross section of described composite parabolic is on the center of circle of absorption tube cross section circle;
Described internal reflection condenser support and glass plate fixed head are bolted in beam base, and described beam base is arranged on base and reinforces in support;
Described internal reflection condenser is made by mirror-reflection aluminium sheet, and inner surface is through anodized, and high temperature resistant impact reaches 300 ℃;
Described internal reflection condenser support is formed by line cutting processing, strengthens fixing between described internal reflection condenser support by steady brace;
Described absorption tube is plated film steel pipe, and caliber is 50-100mm; Described absorption tube support is formed by line cutting processing;
Described heat-insulation layer outer cover is made by stainless steel;
On the both sides of described armorplate glass, glass plate fixed head, be provided with gas permeable carbon felt.
CN200910238180.6A 2009-11-17 2009-11-17 Composite paraboloid high temperature thermal collector designed by taking lead as basis Expired - Fee Related CN102062479B (en)

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Publication number Priority date Publication date Assignee Title
CN102287930A (en) * 2011-08-18 2011-12-21 王学明 Composite solar heat collector
CN102927546B (en) * 2012-11-19 2015-05-20 皇明太阳能股份有限公司 Linear Fresnel system for directly generating steam
CN103994586A (en) * 2013-02-20 2014-08-20 北京航空航天大学北海学院 High-spotlight-degree composite trough heat collector
CN105241080B (en) * 2015-10-21 2017-06-27 中国华能集团清洁能源技术研究院有限公司 A kind of Fresnel solar energy thermal-power-generating composite parabolic secondary reflection mirror structure

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JP2005300138A (en) * 2004-03-17 2005-10-27 Showa Denko Kk Heat radiator used compatibly for light convergence, manufacturing method therefor, heat radiator used compatibly for solar heat collection, and method of manufacturing heat radiator used compatibly for solar heat collection
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CN85109238A (en) * 1985-12-16 1986-09-03 青海省太阳能研究所 The normal temperature fast anode oxidation technology of metallized film
CN2232129Y (en) * 1994-09-16 1996-07-31 葛文杰 High effective condensing type solar heat collector
CN2354078Y (en) * 1998-11-13 1999-12-15 朱建乐 Composite curved-face light-collecting solar collector
JP2001221513A (en) * 2000-02-10 2001-08-17 Exedy Corp Solar heat collecting device
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JP2005283092A (en) * 2004-03-03 2005-10-13 Showa Denko Kk Solar heat collecting and radiating device, and manufacturing method therefor
JP2005300138A (en) * 2004-03-17 2005-10-27 Showa Denko Kk Heat radiator used compatibly for light convergence, manufacturing method therefor, heat radiator used compatibly for solar heat collection, and method of manufacturing heat radiator used compatibly for solar heat collection
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