CN206572784U - A kind of built-in solar energy collecting tubes of heat dump - Google Patents

A kind of built-in solar energy collecting tubes of heat dump Download PDF

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Publication number
CN206572784U
CN206572784U CN201621160644.8U CN201621160644U CN206572784U CN 206572784 U CN206572784 U CN 206572784U CN 201621160644 U CN201621160644 U CN 201621160644U CN 206572784 U CN206572784 U CN 206572784U
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heat
heat dump
sleeve pipe
solar energy
collector
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CN201621160644.8U
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范满
梁宏博
郑万冬
由世俊
张欢
夏军宝
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Tianjin University
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Tianjin University
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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
    • Y02E10/44Heat exchange systems

Abstract

The utility model discloses a kind of built-in solar energy collecting tubes of heat dump, including the part such as heat dump, pitch-dark coating, heat transfer medium, inner layer glass sleeve pipe, glass outer sleeve pipe, selective transmission layer.Heat dump outer surface scribbles pitch-dark coating, and heat dump is placed in inside heat transfer medium, inside and outside have heat transfer medium, be narrow and small air layer between inner layer glass sleeve pipe and glass outer sleeve pipe or vacuumize.The design of selective transmission layer is in internal layer glass bushing outer surface, the characteristics of with high-transmission rate, low-launch-rate, can effectively reduce the radiation heat loss between inner layer glass sleeve pipe and glass outer sleeve pipe.Solar energy heat collection pipe described in the utility model has collecting efficiency height, heat loss is small, be easy to the features such as modularization is installed, it can be applied in the device such as non-focusing type heat collector or line focus type heat collector, technical support provided for the further large-scale promotion application of solar thermal collector.

Description

A kind of built-in solar energy collecting tubes of heat dump
Technical field
The utility model is related to solar energy heating technical field, including heat dump structure, collector structure, end connection etc. Content, specifically a kind of built-in solar energy heat collection pipe of heat dump.
Background technology
Different according to solar thermal collector temperature, solar thermal collector can be divided into low-temperature solar energy heat collector, operating temperature Less than 80 DEG C;Middle temperature solar heat collector, operating temperature range is 80~250 DEG C;High temperature heat collector, operating temperature is at 250 DEG C More than.Solar low-temperature heat collector can be applied to the fields such as hot water, heating;Solar energy high temperature heat collector can be used for heating, making The fields such as cold, generating.
Thermal-collecting tube is as the core component of solar thermal collector, and the height of its performance directly affects whole heat collector heating power The quality of performance.Current existing thermal-arrest form of tubes is made up of internal layer endothermic tube and outer layer glass tube mostly:Internal layer endothermic tube Coating for selective absorption is coated with outside, outer sheath is vacuumized with glass tube, between endothermic tube and glass tube to reduce heat loss, and two ends are close Envelope connection.This thermal-collecting tube is generally metal-glass vaccum heat-collecting tube and all-glass vacuum thermal-collecting tube, can be applied to solar vacuum tube In the other forms heat collectors such as energy heat collector, trough type solar heat-collector.Because the annular space between endothermic tube and glass tube is taken out Application of vacuum, the convection heat losses between endothermic tube and glass tube can be greatly reduced, and thermal-collecting tube collecting efficiency is higher.But endothermic tube is made For whole heat collector temperature highest part, although outer surface scribbles coating for selective absorption (high-absorbility, low-launch-rate), inhale The radiation heat loss of heat pipe outwardly is still larger.Therefore, the heat loss that reduction endothermic tube is transmitted to the external world is to improve whole thermal-arrest One key measure of device thermal performance.
On the other hand, internally the diabatic process of heat-transfer working medium is also to improve the one of heat collector thermal performance to enhancing endothermic tube Item key measure.For traditional thermal-collecting tube, working media flow distance in passage is short, turbulence intensity is low, the biography with heat dump The problems such as hot area is small so that working media can not fully absorb heat, and the collecting efficiency of heat collector has much room for improvement.For solar energy collection Hot device, how to reduce heat loss and enhancing endothermic tube internally working medium that endothermic tube is transmitted to the external world diabatic process still need into Further investigate to one step.
Utility model content
In order to solve problems of the prior art, the utility model provides a kind of built-in new sun of heat dump Energy thermal-collecting tube, traditional solar energy heat collection pipe water stream channel is short in the prior art, working medium turbulence intensity is low for solution, the biography with heat dump Hot area is small and the problem of big heat loss, can be applied in basic, normal, high temperature solar heat collector.
To achieve the above object, the technical scheme that the utility model is taken is:
A kind of built-in solar energy collecting tubes of heat dump, including heat dump, pitch-dark coating, heat transfer medium, internal layer glass The parts such as glass sleeve pipe, glass outer sleeve pipe, selective transmission layer.Heat dump outer surface scribbles pitch-dark coating, to absorb throwing Penetrate the solar radiant energy come.Heat dump is placed in inside heat transfer medium, inside and outside have heat transfer medium, it is possible to increase heat transfer medium with The heat transfer area of heat dump.It is narrow and small air layer between inner layer glass sleeve pipe and glass outer sleeve pipe or vacuumizes, can effectively subtracts The convection heat losses of small heat dump.Selective transmission layer design is in internal layer glass bushing outer surface, with high-transmission rate, low transmitting The characteristics of rate, it can effectively reduce the radiation heat loss between inner layer glass sleeve pipe and glass outer sleeve pipe.
The heat transfer medium can be conduction oil, water, alcoholic solution, melting salt etc..
The heat dump can be metal tube or metallic plate, and its section shape can be tubular type, plate, V-type, aerofoil profile Etc. shape, heat dump format surface can be the combination of rib-type, corrugated, seam rush type etc. or more the form.It is described to inhale Hot device is alternatively porous media, such as foam metal, foamed ceramics, carbon fiber.
On the one hand the heat dump can absorb the sunshine that direct projection comes, and on the other hand can also absorb by reflector or poly- The sunshine that the reflection of light device comes, so as to heat the heat-transfer working medium inside and outside receiver, can be applied to solar energy non-focusing or line Focusing solar collector.
The thermal-collecting tube can be single flow or U-tube formula, and adjacent two thermal-collecting tube is real by modes such as screw thread, flange or welding It is existing connected in series or in parallel.
The beneficial effects of the utility model are:
1st, the heat dump of the utility model thermal-collecting tube is placed in inside heat-transfer working medium, is whole thermal-collecting tube temperature highest portion Part.Heat dump by heat be directly transmitted to inside and outside heat-transfer working medium, compared to traditional heat collector (Fig. 1 shows) first by heat by inhaling Hot device outer surface passes to heat dump inner surface, then transfers heat to internal heat transfer working medium by heat dump inner surface, it is possible to increase Heat transfer temperature difference between heat dump and heat transfer medium simultaneously increases heat transfer area.
2nd, heat dump surface scribbles pitch-dark coating, to absorb the solar energy that projection comes.Heat dump transfers heat to biography Thermal medium, heat transfer medium transfers heat to inner layer glass sleeve pipe again, because the temperature of inner layer glass sleeve pipe is less than heat dump, by The heat loss that inner layer glass sleeve pipe is transmitted to the external world can be reduced effectively compared to traditional heat collector.
3rd, heat dump section shape (Fig. 3 shows) can make it is a variety of meet optical principle be conducive to improve optical efficiency shape Shape, such as:The shape such as tubular type, plate, V-type, aerofoil profile.Heat dump surfaces externally and internally form (Fig. 4 shows) can be made a variety of favourable In improve heat transfer efficiency form, such as:The combination of rib-type, corrugated, seam rush type etc. or more the form.Heat dump also may be used For porous media, pitch-dark coating is coated with absorbing radiating surface, the absorptive rate of radiation to improve material;In addition, porous media In the presence of the heat transfer area of heat dump and heat transfer medium can also be increased, increase heat transfer efficiency.
4th, in internal layer glass bushing outer surface design choice transmission layer, selective transmission layer has high-transmission rate, low hair The characteristics of penetrating rate, can effectively reduce the radiation heat loss between inner layer glass sleeve pipe and glass outer sleeve pipe.
5th, it is narrow and small air layer between inner layer glass sleeve pipe and glass outer sleeve pipe or vacuumizes design, effectively reduces internal layer Convection heat losses between glass bushing and glass outer sleeve pipe.In addition, doing application of vacuum between two glass bushings compared to tradition Application of vacuum is done between the metal tube and glass tube of thermal-collecting tube, it is easy to processing and reliability height.
6th, thermal-collecting tube may be designed as through type or U-tube formula, is connected by stand connection, can effectively realize thermal-arrest Tube moduleization is designed and assembling.
7th, thermal-collecting tube can be applied to non-focusing type heat collector (such as flat plate collector, vacuum tube collector) or line focus type In heat collector (such as composite parabolic heat collector, trough type solar heat-collector) device.In focusing solar collector, heat dump is set At concentrator focal line position, although heat dump area has reduced compared to traditional heat collector, but the solar radiation quantity received Do not reduce.
Solar energy heat collection pipe described in the utility model has collecting efficiency is high, heat loss is small, be easy to modularization to install etc. Feature, can be applied to non-focusing type heat collector (such as flat plate collector, vacuum tube collector) or line focus type heat collector (as again Close parabolic collector, trough type solar heat-collector) etc. in device, be that the further large-scale promotion application of solar thermal collector is carried Technical support is supplied.
Brief description of the drawings
Fig. 1 is a kind of typical traditional thermal-collecting tube schematic diagram;
Fig. 2 be the utility model proposes the built-in novel heat collecting pipe schematic diagram of heat dump;
Fig. 3 is the A-A profiles shown in Fig. 2, and gives heat dump section possible shape citing:(a) pipe;(b) Flat board;(c) V-type;(d) aerofoil profile and (e) porous media heat dump;
Fig. 4 is the possible format surface citing of heat dump:(a) rib-type A-A profiles;(b) rib-type B-B profiles; (c) corrugated A-A profiles;(d) corrugated B-B profiles;(e) seam rush type A-A profiles;(f) seam rush type B-B profiles;
Fig. 5 is the possible application form of embodiment heat collector:(a) flat plate collector;(b) vacuum tube collector;(c) it is multiple Close parabolic collector;(d) parabolic trough collector;
Fig. 6 is two kinds of possible type of attachment schematic diagrames of single flow thermal-collecting tube;
Fig. 7 is two kinds of possible type of attachment schematic diagrames of U-shaped thermal-collecting tube.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, below in conjunction with specific embodiment, and Referring to the drawings, the utility model is further described.
As shown in Fig. 2 solar energy heat collection pipe of the present utility model includes heat dump 1, the outer surface of heat dump 1 scribbles pitch-dark painting Layer 2, to absorb the solar radiant energy that projection comes.Have heat transfer medium 3 inside and outside heat dump 1, it is possible to increase heat transfer medium 3 with The heat transfer area of heat dump 1.It is narrow and small air layer between inner layer glass sleeve pipe 4 and glass outer sleeve pipe 5 or vacuumizes, can be effective Reduce the convection heat losses between inner layer glass sleeve pipe 4 and glass outer sleeve pipe 5.Selective transmission layer 6 is designed in internal layer glass sock The outer surface of pipe 4, the characteristics of with high-transmission rate, low-launch-rate, can effectively reduce inner layer glass sleeve pipe 4 and glass outer sleeve pipe 5 Between radiation heat loss.
The material of heat dump 1 is metal, and its cross sectional shape can take tubular type (Fig. 3 a), plate (Fig. 3 b), V-type (figure 3c), the shape such as aerofoil profile (Fig. 3 d), to improve optical efficiency.Show inside and outside heat dump 1 form may be designed as rib-type (Fig. 4 a, B) combination of, corrugated (Fig. 4 c, d), seam rush type (Fig. 4 e, f) etc. or more the form, to strengthen heat transfer efficiency.Heat dump 1 Or porous media material (Fig. 3 e), such as foam metal, foamed ceramics, carbon fiber, in order to improve the radiation absorption of material Rate, can absorb radiating surface in porous media and be coated with pitch-dark coating 2.
The thermal-collecting tube can be applied to non-focusing type heat collector, such as flat plate collector (Fig. 5 a) and vacuum tube collector (Fig. 5 b).Flat plate collector is main by heat dump 1, heat-transfer working medium 3, glass outer sleeve pipe 5, clear glass cover plate 7, reflector 8th, the part such as thermal insulation layer 9 and shell 10 is constituted.Heat-transfer working medium 3, heat absorption are full of wherein between heat dump 1 and glass outer sleeve pipe 5 Device 1 absorbs solar radiant energy and transmits heat to heat-transfer working medium 3.Clear glass cover plate 7 can through most of sunshine without Through far infrared, so as to reduce heat dissipation capacity, the temperature of heat dump is improved.Reflector 8 can receive solar radiation and be changed Change direction and be mapped on heat dump 1.Thermal insulation layer 9 can play reduction heat collector and be radiated to surrounding environment, improve the heat collector thermal efficiency Effect.Shell 10 plays a part of supporting and protected.Vacuum tube collector is main by thermal-collecting tube (Fig. 2 shows), transparent glass cover The parts such as plate 7, reflector 8, thermal insulation layer 9 and shell 10 are constituted.Due to being taken out between inner layer glass sleeve pipe 4 and glass outer sleeve pipe 5 Application of vacuum, the collecting efficiency of this heat collector is higher, good heat insulating.
The thermal-collecting tube can also be applied to focusing solar collector, such as composite parabolic heat collector (Fig. 5 c) and parabolic trough Heat collector (Fig. 5 d).Composite parabolic heat collector it is main by thermal-collecting tube (Fig. 2 shows), it is clear glass cover plate 7, concentrator 11, heat-insulated Layer 9 and the grade of shell 10 part are constituted.Concentrator 11 is by solar ray collecting to heat dump 1, so as to improve flowing for the surface of heat dump 1 Density, and then improve the temperature of heat-transfer working medium 3.Compound parabolic concentrator is the concentrator using some pieces of paraboloidal mirror compositions The non-imaging collector of 11 convergence solar radiations, and parabolic trough collector is by a groove with parabolic cross section Shape concentrator 11 converges the line focus heat collector of solar radiation.
Single flow heat collector attachment structure schematic diagram is as shown in Figure 6.Fig. 6 a show heat collector it is main by thermal-collecting tube (Fig. 2 shows), The parts such as inlet header 12, outlet header 13, incubation chamber 14 are constituted.The import and export of thermal-collecting tube and import and export collector 12,13 are used Reversed return type is connected, wherein inner layer glass sleeve pipe 4 and the two ends of glass outer sleeve pipe 5 annular sealing, with importing and exporting collector 12,13 phases Even, it is applied to Fig. 5 a~heat collector shown in c this type of attachment more.Fig. 6 b show that heat collector is main by thermal-collecting tube (Fig. 2 shows), end The grade of connector 15 part is constituted.Adjacent thermal-collecting tube can be connected by modes such as screw thread, flange or welding with end coupling 15, this Heat collector shown in Fig. 5 d being applied to kind type of attachment more.
U-shaped heat collector attachment structure schematic diagram is as shown in Figure 7.Fig. 7 a show that heat collector is main by thermal-collecting tube (Fig. 2 shows), import The parts such as collector 12, outlet header 13, incubation chamber 14 are constituted.The import and export of thermal-collecting tube and import and export collector 12,13 use same journey Formula is connected, and wherein heat dump 1 is connected with water inlet collector 12, and inner layer glass sleeve pipe 4 is connected with water outlet collector 13, this type of attachment It is applied to Fig. 5 a~heat collector shown in c more.Fig. 7 b show thermal-collecting tube (Fig. 2 shows) and inlet header 12, the connection shape of outlet header 13 Formula is applied to heat collector shown in Fig. 5 d more with described in Fig. 7 a this type of attachment.
Above by reference to drawings and examples, the utility model is schematically described, the description is not restricted.This The common construction technical staff in field is understood that, in actual applications, the set-up mode of each part in the utility model Can occur some changes, and other staff may also make similar Design under its enlightenment.It is pointed out that without departing from Design aim of the present utility model, all obvious changes and its similar Design, are all contained in protection of the present utility model Within the scope of.

Claims (7)

1. a kind of built-in solar energy collecting tubes of heat dump, it is characterised in that including heat dump (1), pitch-dark coating (2), On the outside of heat transfer medium (3), inner layer glass sleeve pipe (4), glass outer sleeve pipe (5), selective transmission layer (6) part, heat dump (1) Surface scribbles pitch-dark coating (2), and it is internal that heat dump (1) is placed in heat transfer medium (3), inside and outside have heat transfer medium (3), internal layer It is narrow and small air layer between glass bushing (4) and glass outer sleeve pipe (5) or vacuumizes, in selective transmission layer (6) is arranged on Layer glass bushing (4) outer surface.
2. built-in solar energy collecting tubes of heat dump according to claim 1, it is characterised in that the heat transfer medium (3) it is conduction oil, water, alcoholic solution or melting salt.
3. built-in solar energy collecting tubes of heat dump according to claim 1, it is characterised in that the heat dump (1) For metal tube or metallic plate, its section shape can be tubular type, plate, V-type or aerofoil profile.
4. built-in solar energy collecting tubes of heat dump according to claim 3, it is characterised in that the heat dump (1) Format surface is the combination of rib-type, corrugated, seam rush type or more the form.
5. built-in solar energy collecting tubes of heat dump according to claim 1, it is characterised in that the heat dump (1) For porous media.
6. built-in solar energy collecting tubes of heat dump according to claim 5, it is characterised in that the porous media is Foam metal, foamed ceramics or carbon fiber.
7. built-in solar energy collecting tubes of heat dump according to claim 1, it is characterised in that the thermal-collecting tube can be Single flow or U-tube formula, adjacent two thermal-collecting tube are realized connected in series or in parallel by screw thread, flange or welding manner.
CN201621160644.8U 2016-10-25 2016-10-25 A kind of built-in solar energy collecting tubes of heat dump Active CN206572784U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106352567A (en) * 2016-10-25 2017-01-25 天津大学 Novel solar heat collection pipe with built-in heat absorber
WO2019127596A1 (en) * 2017-12-30 2019-07-04 淄博环能海臣环保技术服务有限公司 Same-plane pipe arrangement glass heat pipe heat collection core vacuum heat collection pipe module

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106352567A (en) * 2016-10-25 2017-01-25 天津大学 Novel solar heat collection pipe with built-in heat absorber
WO2019127596A1 (en) * 2017-12-30 2019-07-04 淄博环能海臣环保技术服务有限公司 Same-plane pipe arrangement glass heat pipe heat collection core vacuum heat collection pipe module

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