CN106152548A - Two-dimensional tracking formula focusing solar heat collector - Google Patents

Two-dimensional tracking formula focusing solar heat collector Download PDF

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Publication number
CN106152548A
CN106152548A CN201510134223.1A CN201510134223A CN106152548A CN 106152548 A CN106152548 A CN 106152548A CN 201510134223 A CN201510134223 A CN 201510134223A CN 106152548 A CN106152548 A CN 106152548A
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China
Prior art keywords
thermal
fluid
heat collector
pipe
housing
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Pending
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CN201510134223.1A
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Chinese (zh)
Inventor
项晓东
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YIKEBO ENERGY SCIENCE AND TECHNOLOGY (SHANGHAI) Co Ltd
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YIKEBO ENERGY SCIENCE AND TECHNOLOGY (SHANGHAI) Co Ltd
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Priority to CN201510134223.1A priority Critical patent/CN106152548A/en
Publication of CN106152548A publication Critical patent/CN106152548A/en
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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

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Abstract

The invention discloses a kind of two-dimensional tracking formula focusing solar heat collector.This two-dimensional tracking formula focusing solar heat collector includes that housing, fluid flow into pipe, many thermal-arrest pipelines, fluid effuser, expansion joint, absorber plate and shielding, and wherein fluid flows into that pipe is connected with one end of housing by expansion joint and fluid effuser passes through another expansion joint and is connected with the other end of housing.Thermal-arrest pipeline is connected in parallel mutually, and the entrance of each thermal-arrest pipeline all flows into fluid communication with fluid, and the outlet of each thermal-arrest pipeline is all in fluid communication with fluid effuser.Absorber plate is close to the surface of each thermal-arrest pipeline, and the selective absorber coatings of surface-coated of absorber plate.The heat collector collecting efficiency of the present invention is high, simple and reliable for structure and low cost of manufacture.

Description

Two-dimensional tracking formula focusing solar heat collector
Technical field
The present invention relates to solar light-heat power-generation system, focus on particularly to a kind of two-dimensional tracking formula Solar thermal collector.
Background technology
The energy is social development, the basis of human progress.Along with industrial expansion go from strength to strength with And human wants expanding day, it being becoming tight Energy situation day, green energy resource is considered as from root The approach of mankind's energy demand is solved in basis.
Wherein solar energy is because of its " reserves " unlimitedness, is distributed universality, cleaning and economy Feature and be considered as one of the most potential new forms of energy.The feature of solar light-heat power-generation Being good with electrical network suitability, photoelectric conversion rate is high, and environmental protection is adjustable, thus becomes solar energy profit Important development direction.
Solar light-heat power-generation it is crucial that by solar energy accumulationization, needed for producing generating Temperature and energy, thus the heat collector part of solar light-heat power-generation system becomes whole system Key, it directly affects the economy of light thermoelectric conversion efficiency and cost of electricity-generating.
Existing solar hot water heat collector has various structures, generally can be divided into board-like thermal-arrest Device, vacuum heat collection pipe and heat pipe vacuum hot collector.Plate-type collector cost performance is higher, heat absorption At heat exchange interface relatively gently, Energy distribution is more uniform, and whole interface does not exist focus, overall Heat exchange is more uniform, and service life is longer, and therefore plate-type collector occupies in solar energy optical-thermal field Consequence, but plate-type collector anti-freezing property is poor, is unsuitable for northern area and uses.Very Empty set heat pipe can be low temperature resistant-30 DEG C, but the breakage rate of glass pipe fitting is higher, and low temperature usefulness Poor, the vacuum heat collection pipe of direct current mode has the danger of booster in summer.Hot pipe type vacuum thermal-arrest Device usefulness is preferable, but equally exists the danger that glass tubing easily splits, and therefore, the most not yet occurs one Plant universality, the solar thermal collector that cost performance is higher.
Summary of the invention
It is an object of the invention to provide a kind of novel two-dimensional tracking formula focused solar energy thermal-arrest Device.Have good freezing tolerance, higher thermal-arrest heat transfer effect, the higher smooth thermal efficiency, Longer service life and lower cost of manufacture.
For solving above-mentioned technical problem, the invention provides a kind of two-dimensional tracking formula focused solar energy Heat collector, this heat collector includes:
Housing, described housing is made up of transparent material；
Fluid flows into pipe, and described fluid is flowed into pipe and connected by one end of an expansion joint with described housing Connect；
Fluid effuser, described fluid effuser passes through another of another expansion joint and described housing End connects；
Many thermal-arrest pipelines, described thermal-arrest pipeline is arranged in described housing and the company of being in parallel mutually Connect, the entrance of each described thermal-arrest pipeline all with described fluid flow into fluid communication, and each The outlet of described thermal-arrest pipeline is all in fluid communication with described fluid effuser；
Absorber plate, described absorber plate is close to the surface of described thermal-arrest pipeline, and described absorber plate The selective absorber coatings of surface-coated.
In one embodiment, the inside vacuum-pumping of housing, and every thermal-arrest pipeline is perpendicular to described Fluid flows into pipe and described fluid effuser is arranged.
In another embodiment, the shady face of described thermal-arrest pipeline is provided with one layer, two-layer or three layers of heat Radiation shield, this thermal radiation shield can be coated reflection plate.
In another embodiment, described fluid flows into pipe and described fluid effuser can be metal tube.
In another embodiment, described thermal-arrest pipeline can be metal tube, and described housing can be glass.
In another embodiment, this thermal radiation shield can be aluminium sheet or corrosion resistant plate of aluminizing, this heat Radiation shield is securable to fluid and flows on pipe and fluid effuser.
In another embodiment, described thermal-arrest pipeline can parallel equidistant arrangement.
Preferably, a diameter of 5-10mm of described thermal-arrest pipeline, and the thickness of pipe wall of described thermal-collecting tube Degree is 0.3mm-0.7mm.
In another embodiment, pass through to cut down between described expansion joint with described housing to be connected.
In another embodiment, evaporable can be filled and presented in described housing and/or nonevaporable getter is used To maintain the vacuum of vacuum chamber.
Compared with prior art, the main distinction and effect thereof are embodiment of the present invention: parallel Many thermal-collecting tubes in parallel and the absorber plate being positioned at heat collection tube combine, and improve heat collector Thermal-arrest heat exchange efficiency.Corrugated absorber plate increases and contact area between thermal-collecting tube, makes Heat-transfer surface uniformity of temperature profile, reduces system pipeline thermal losses and system circulating pump power consumption.Parallel Parallel pipeline flow resistance is little, can solve, by circulating-heating, the problem that temperature rise is little, manufacture and be incubated Technique is simple.Vacuum cavity makes better heat preservation so that heat collector possesses the most freeze proof Ability, solves glass tube vacuum encapsulation problem, extends the service life of heat collector.Additionally, The fluid that metal is made flows into pipe and metal fluid effuser so that the collector structure of the present invention More simple and reliable, low cost of manufacture.
Accompanying drawing explanation
Fig. 1 is the positive TV structure of the two-dimensional tracking formula focusing solar heat collector of the embodiment of the present invention Schematic diagram；
Fig. 2 is the side-looking structure of the two-dimensional tracking formula focusing solar heat collector of the embodiment of the present invention Schematic diagram；And
Fig. 3 is the perspective structure of the two-dimensional tracking formula focusing solar heat collector of the embodiment of the present invention Schematic diagram.
Detailed description of the invention
In the following description, in order to make reader be more fully understood that, the application proposes many skills Art details.But, even if it will be understood by those skilled in the art that and there is no these technology Details and many variations based on following embodiment and amendment, it is also possible to realize the application each Claim technical scheme required for protection.
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing Embodiments of the present invention are described in further detail.In figure, same or analogous component is adopted It is presented with like reference characters.
See Fig. 1～3, for the structural representation of this two-dimensional tracking formula focusing solar heat collector 100 Figure.This two-dimensional tracking formula focusing solar heat collector 100 includes: housing 1, fluid flow into pipe 2, many thermal-arrest pipelines 3, fluid effuser 4, entrance expansion joint 5, outlet expansion joint 6, suctions Hot plate 7 and barricade 8, wherein fluid flows into pipe 2 by entrance expansion joint 5 and housing 1 One end connect and fluid effuser 4 by the other end of outlet expansion joint 6 and housing 1 even Connect.In thermal-arrest pipeline 3 is arranged on housing 1 and it is connected in parallel mutually, and every thermal-arrest pipeline hangs down Directly flow into pipe and described fluid effuser layout in described fluid.Entering of each described thermal-arrest pipeline Mouth all flows into pipe 2 with described fluid and is in fluid communication, and the outlet of each described thermal-arrest pipeline 3 is equal It is in fluid communication with described fluid effuser 4.Absorber plate 7 is close to the surface of each thermal-arrest pipeline 3, And the selective absorber coatings of surface-coated of absorber plate 7.Thermal radiation shield is positioned at thermal-collecting tube The shady face on road 3.In this embodiment, housing 1 is made of clear material.It is preferred that housing It is made up of glass, such as Pyrex.The shape of housing can be cylindrical shape or elliptical cylinder-shape or Other shape being suitable to preferably absorb sunlight any.It is preferred that this surface of shell is coated with Anti-reflection film, anti-reflection film is used for reducing the loss of surface of shell sunlight, increases the incident energy of sunlight Amount.
Fluid flows into and is equipped with multiple port on pipe 2 and fluid effuser 4, is respectively used to and collection The entrance and exit of heat pipe connects.Fluid flows into pipe 2 and fluid effuser 4 is metal tube, gold The heat conductivity belonged to is good, and owing to its intensity is higher, and therefore same at the flow channel as fluid Time can be used as the mounting bracket of thermal-arrest pipeline, absorber plate and/or thermal radiation shield.Optionally Being used for make fluid flowing into the metal material managed with fluid effuser is aluminum, ferrum or steel etc..For The material making fluid inflow pipe and fluid effuser can be the same or different.Fluid flows into Pipe 1 is via expansion joint 5 and can cut down 9 and is connected with one end of housing 1.Similarly, fluid stream Go out pipe 4 via another expand 6 and another can cut down 10 and be connected with the other end of housing 1.
Thermal-arrest pipeline is preferably metal tube.Between thermal-arrest pipeline, parallel equidistant is arranged.Thermal-collecting tube The quantity on road can be arranged according to the capacity of heat collector.It is preferred that the diameter of described thermal-arrest pipeline For 5-10mm, preferably 7-8mm.The pipe thickness of thermal-collecting tube is 0.3mm-0.7mm, relatively Goodly for 0.4-0.5mm.It is preferred that the inside evacuation of housing 1.
Absorber plate 7 is arranged on the sensitive surface of solar thermal collector.It is preferred that absorber plate 7 is close to The surface of pipeline 21, and undulate.Waveform absorber plate forms parallel slot type cavity, makes Obtain after light enters and form light trapping, thus reach more preferable heat transfer effect.Absorber plate 7 surface Coating coating for selective absorption (not shown), is used for absorbing solar visible light spectrum, reflects red Outer light.Thermal radiation shield 8 is arranged at the shady face of heat collector 100, now in example, and heat Radiation shield 8 is one layer, further, it is also possible to arrange two-layer, the screen layer of more than three layers. This thermal radiation shield 8 uses aluminum film, aluminium sheet or plated film corrosion resistant plate.It is preferred that heat radiation Screen layer is close to the shady face of thermal-collecting tube and is fixed on fluid inflow pipe and fluid effuser.Heat Radiation shield 8 can be greatly lowered black body radiation heat loss, improves collector efficiency.Preferably Ground, housing 1 is additionally provided with vacuum pumping mouth (not shown), and housing 1 passes through vacuum pumping mouth evacuation, Further, it is also possible to fill evaporable and/or nonevaporable getter in housing, to remain true The vacuum of cavity.Vacuum has relatively low gas conduction loss, enhances the photo-thermal of heat collector Efficiency.
This parallel connection thermal-arrest pipeline 3, with the tubule arrangement of n a diameter of d, substitutes tradition (groove The hot target of formula) the monotube gathering heat pipe of a diameter of D=nd.
First, in the case of total flow is identical, flow velocity improves n times, and coefficient of heat transfer h For:
h i = 0.023 λ d i ( ρud i μ ) m 0.8 ( C p μ λ ) m 0.4
If the flow velocity that definition u is the hot target of single tube, the single tube coefficient of heat transfer (hiD) and the hot coefficient of comb (hid) ratio is:
h i d h i D = ( nu i ) 0.8 / d 0.2 ( u i ) 0.8 / D 0.2 = n
Visible, in the case of flow velocity is identical, the oil film hot target of Temperature Difference Ratio single tube of the hot target of comb is low (1/n) 0.2=1.37 times (setting n=5), flow n-fold lower；Pipeline caliber can be greatly reduced, Thus considerably reduce system pipeline thermal losses and system circulating pump power consumption.
Additionally, due to have employed corrugated plating heat-absorbing structure, the equivalent radiated power area ratio of the hot target of comb The tradition hot target of single tube is low about 3 times, considerably reduces black body radiation heat loss.When focusing on ratio In the case of little, the impact of system effectiveness is especially apparent by this advantage of the hot target of comb.
(introduce true although its vacuum insulating glass structure brings extra interface reflection light loss Empty glass tubing transmitance), but bring two big incomes: 1) select owing to vacuum condition allows to use Selecting property absorption plated film, 2) reduce forced convection and Natural Heat Convection loss, improve system Heat stability, and be easily maintained.
Further, the present invention use coating for selective absorption greatly reduce radiation, force right Stream and free convection heat loss.Under vacuum condition, absorb plated film and can maintain a long-term stability nothing Damage, thus improve the durability of system.
It addition, by using metal fluid to flow into pipe and metal fluid effuser so that the present invention Collector structure more simple and reliable.
Although by referring to some of the preferred embodiment of the invention, the present invention being carried out Diagram and describing, but it will be understood by those skilled in the art that can in form and carefully On Jie, to it, various changes can be made, without departing from the spirit and scope of the present invention.

Claims (10)

1. a two-dimensional tracking formula focusing solar heat collector, it is characterised in that described thermal-arrest Device includes:
Housing, described housing is made up of transparent material；
Fluid flows into pipe, and described fluid is flowed into pipe and connected by one end of an expansion joint with described housing Connect；
Fluid effuser, described fluid effuser passes through another of another expansion joint and described housing End connects；
Many thermal-arrest pipelines, described thermal-arrest pipeline is arranged in described housing and the company of being in parallel mutually Connect, the entrance of each described thermal-arrest pipeline all with described fluid flow into fluid communication, and each The outlet of described thermal-arrest pipeline is all in fluid communication with described fluid effuser；And
Absorber plate, described absorber plate is close to the surface of described thermal-arrest pipeline, and described absorber plate The selective absorber coatings of surface-coated.
Heat collector the most according to claim 1, it is characterised in that the inside of described housing Evacuation, and every thermal-arrest pipeline is perpendicular to described fluid and flows into pipe and described fluid effuser cloth Put.
Heat collector the most according to claim 1, it is characterised in that described thermal-arrest pipeline Shady face is provided with one layer, two-layer or three layers of thermal radiation shield, and this thermal radiation shield is plated film Reflecting plate.
Heat collector the most according to claim 1, it is characterised in that described fluid flows into pipe It is metal tube with described fluid effuser.
Heat collector the most according to claim 1, it is characterised in that described thermal-arrest pipeline is Metal tube, and described housing is glass.
Heat collector the most according to claim 1, it is characterised in that this thermal radiation shield For aluminium sheet or corrosion resistant plate of aluminizing, this thermal radiation shield is fixed on fluid and flows into pipe and fluid stream Go out on pipe.
Thermal-collecting tube the most according to claim 1, it is characterised in that described thermal-arrest pipeline is put down Row equidistant arrangement.
Heat collector the most according to claim 1, it is characterised in that described thermal-arrest pipeline A diameter of 5-10mm, and the pipe thickness of described thermal-collecting tube is 0.3mm-0.7mm.
Heat collector the most according to claim 1, it is characterised in that described expansion joint and institute State between housing by connection can be cut down.
Heat collector the most according to claim 1, it is characterised in that fill out in described housing Evaporable and/or nonevaporable getter are made in order to maintain the vacuum of vacuum chamber.
CN201510134223.1A 2015-03-25 2015-03-25 Two-dimensional tracking formula focusing solar heat collector Pending CN106152548A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916486A3 (en) * 2006-10-18 2010-07-07 Wagner & Co. Solartechnik GmbH Solar collector system
CN201852502U (en) * 2010-11-05 2011-06-01 上海彩耀新能源投资发展有限公司 Separate-type heat pipe heat exchanger
CN201885515U (en) * 2010-11-18 2011-06-29 林德工程（杭州）有限公司 Piping structure of main heat exchanger in air separation plant
CN203928442U (en) * 2014-06-04 2014-11-05 益科博能源科技（上海）有限公司 Vacuum heat-preserving calandria two-dimensional tracking focusing solar heat collector
CN204593899U (en) * 2015-03-25 2015-08-26 益科博能源科技（上海）有限公司 Two-dimensional tracking formula focusing solar heat collector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1916486A3 (en) * 2006-10-18 2010-07-07 Wagner & Co. Solartechnik GmbH Solar collector system
CN201852502U (en) * 2010-11-05 2011-06-01 上海彩耀新能源投资发展有限公司 Separate-type heat pipe heat exchanger
CN201885515U (en) * 2010-11-18 2011-06-29 林德工程（杭州）有限公司 Piping structure of main heat exchanger in air separation plant
CN203928442U (en) * 2014-06-04 2014-11-05 益科博能源科技（上海）有限公司 Vacuum heat-preserving calandria two-dimensional tracking focusing solar heat collector
CN204593899U (en) * 2015-03-25 2015-08-26 益科博能源科技（上海）有限公司 Two-dimensional tracking formula focusing solar heat collector

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Application publication date: 20161123

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