CN204593899U - 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
CN204593899U
CN204593899U CN201520172881.5U CN201520172881U CN204593899U CN 204593899 U CN204593899 U CN 204593899U CN 201520172881 U CN201520172881 U CN 201520172881U CN 204593899 U CN204593899 U CN 204593899U
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CN
China
Prior art keywords
thermal
fluid
heat collector
arrest pipeline
housing
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Expired - Fee Related
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CN201520172881.5U
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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 CN201520172881.5U priority Critical patent/CN204593899U/en
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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 two-dimensional tracking formula focusing solar heat collector.This two-dimensional tracking formula focusing solar heat collector comprises housing, fluid inflow pipe, many thermal-arrest pipelines, fluid effuser, expansion joint, absorber plate and shieldings, and wherein fluid inflow pipe to be connected with one end of housing by expansion joint and fluid effuser is connected with the other end of housing by another expansion joint.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 all flows out fluid communication with fluid.Absorber plate is close to the surface of each thermal-arrest pipeline, and the surface of absorber plate is coated with coating for selective absorption.Heat collector collecting efficiency of the present utility model is high, simple and reliable for structure and low cost of manufacture.

Description

Two-dimensional tracking formula focusing solar heat collector
Technical field
The utility model relates to solar light-heat power-generation system, particularly a kind of two-dimensional tracking formula focusing solar heat collector.
Background technology
The energy is social development, the basis of human progress.Along with industrial expansion goes from strength to strength and human wants expanding day, Energy situation day is becoming tight, and green energy resource is considered to the approach fundamentally solving mankind's energy demand.
Wherein solar energy is because of its " reserves " unlimitedness, distribution generality, the feature of clean and economy and be considered to one of the most potential new forms of energy.The feature of solar light-heat power-generation is good with electrical network suitability, and photoelectric conversion rate is high, and environmental protection is adjustable, thus becomes the important development direction of Solar use.
The key of solar light-heat power-generation is by gathering of solar energy, produce the temperature needed for generating and energy, thus the heat collector part of solar light-heat power-generation system becomes the key of whole system, and 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 plate-type collector, vacuum heat collection pipe and heat pipe vacuum hot collector.Plate-type collector cost performance is higher, heat absorption heat exchange interface place is relatively mild, Energy distribution is more even, there is not focus in whole interface, overall heat exchange is comparatively even, and service life is longer, and therefore plate-type collector occupies consequence in solar energy optical-thermal field, but plate-type collector anti-freezing property is poor, is unsuitable for northern area and uses.Vacuum heat collection pipe can be low temperature resistant-30 DEG C, but the breakage rate of glass pipe fitting is higher, and low temperature usefulness is poor, and the vacuum heat collection pipe of direct current mode has the danger of booster in summer.Heat pipe vacuum hot collector usefulness is better, but there is the danger that glass tube easily splits equally, therefore, not yet occurs a kind of universality, the solar thermal collector that cost performance is higher at present.
Utility model content
The purpose of this utility model is to provide a kind of novel two-dimensional tracking formula focusing solar heat collector.There is good freezing tolerance, higher thermal-arrest heat transfer effect, higher photo-thermal efficiency, longer service life and lower cost of manufacture.
For solving the problems of the technologies described above, the utility model provides a kind of two-dimensional tracking formula focusing solar heat collector, and this heat collector comprises:
Housing, described housing is made up of transparent material;
Fluid inflow pipe, described fluid inflow pipe is connected with one end of described housing by an expansion joint;
Fluid effuser, described fluid effuser is connected with the other end of described housing by another expansion joint;
Many thermal-arrest pipelines, described thermal-arrest pipeline to be arranged in described housing and to be connected in parallel mutually, and the entrance of thermal-arrest pipeline described in each all flows into fluid communication with described fluid, and fluid communication is all flowed out in the outlet of thermal-arrest pipeline described in each with described fluid;
Absorber plate, described absorber plate is close to the surface of described thermal-arrest pipeline, and the surface of described absorber plate is coated with coating for selective absorption.
In one embodiment, the inside vacuum-pumping of housing, and every root thermal-arrest pipeline is arranged perpendicular to described fluid inflow pipe and described fluid effuser.
In another embodiment, the shady face of described thermal-arrest pipeline is provided with one deck, two-layer or three layers of thermal radiation shield, and this thermal radiation shield can be coated reflection plate.
In another embodiment, described fluid inflow 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, and this thermal radiation shield can be fixed on fluid inflow pipe and fluid effuser.
In another embodiment, described thermal-arrest pipeline can parallel equidistant arrangement.
Preferably, the diameter of described thermal-arrest pipeline is 5-10mm, and the pipe thickness of described thermal-collecting tube is 0.3mm-0.7mm.
In another embodiment, be connected by cutting down between described expansion joint with described housing.
In another embodiment, evaporable and/or nonevaporable getter can be filled and presented in described housing in order to maintain the vacuum of vacuum chamber.
Compared with prior art, the main distinction and effect thereof are the utility model embodiment: many thermal-collecting tubes of parallel connection combine with the absorber plate being positioned at heat collection tube, improve the thermal-arrest heat exchange efficiency of heat collector.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 systemic circulation pump power consumption.Parallel connection pipeline flow resistance is little, can solve the little problem of temperature rise by circulating-heating, manufacture and heat preservation method simple.Vacuum cavity makes better heat preservation, makes heat collector possess better freezing tolerance, solves glass tube vacuum encapsulation problem, extends the service life of heat collector.In addition, metal fluid inflow pipe and metal fluid effuser, make collector structure of the present utility model more simple and reliable, low cost of manufacture.
Accompanying drawing explanation
Fig. 1 be the two-dimensional tracking formula focusing solar heat collector of the utility model embodiment face structural representation;
Fig. 2 is the side-looking structural representation of the two-dimensional tracking formula focusing solar heat collector of the utility model embodiment; And
Fig. 3 is the perspective structure schematic diagram of the two-dimensional tracking formula focusing solar heat collector of the utility model embodiment.
Detailed description of the invention
In the following description, many ins and outs are proposed in order to make reader understand the application better.But, persons of ordinary skill in the art may appreciate that even without these ins and outs with based on the many variations of following embodiment and amendment, also can realize each claim of the application technical scheme required for protection.
For making the purpose of this utility model, technical scheme and advantage clearly, below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.In figure, same or analogous component uses the same reference numerals to represent.
See Fig. 1 ~ 3, it is the structural representation of this two-dimensional tracking formula focusing solar heat collector 100.This two-dimensional tracking formula focusing solar heat collector 100 comprises: housing 1, fluid inflow pipe 2, many thermal-arrest pipelines 3, fluid effuser 4, entrance expansion joint 5, outlet expansion joint 6, absorber plate 7 and barricade 8, and wherein fluid inflow pipe 2 is connected with one end of housing 1 by entrance expansion joint 5 and fluid effuser 4 passes through to export expansion joint 6 and is connected with the other end of housing 1.Thermal-arrest pipeline 3 to be arranged in housing 1 and to be connected in parallel mutually, and every root thermal-arrest pipeline is arranged perpendicular to described fluid inflow pipe and described fluid effuser.The entrance of thermal-arrest pipeline described in each is all communicated with described fluid inflow pipe 2 fluid, and the outlet of thermal-arrest pipeline 3 described in each is all communicated with described fluid effuser 4 fluid.Absorber plate 7 is close to the surface of each thermal-arrest pipeline 3, and the surface of absorber plate 7 is coated with coating for selective absorption.Thermal radiation shield is positioned at the shady face of thermal-arrest pipeline 3.In this embodiment, housing 1 is made up of transparent material.Preferably, housing is made up of glass, such as Pyrex.The shape of housing can be suitable for for cylindrical shape or elliptical cylinder-shape or any other shape absorbing sunshine better.Preferably, this surface of shell is coated with anti-reflection film, and anti-reflection film, for reducing the loss of surface of shell sunshine, increases the projectile energy of sunshine.
Fluid inflow pipe 2 and fluid effuser 4 are equipped with multiple port, are respectively used to be connected with the entrance and exit of thermal-collecting tube.Fluid inflow pipe 2 and fluid effuser 4 are metal tube, and the thermal conductivity of metal is good, and due to its intensity higher, therefore while the flow channel being used as fluid, can be used as the mounting bracket of thermal-arrest pipeline, absorber plate and/or thermal radiation shield.The metal material being optionally used for making fluid inflow pipe and fluid effuser is aluminium, iron or steel etc.Material for making fluid inflow pipe and fluid effuser can be the same or different.Fluid inflow pipe 1 is via expansion joint 5 and can cut down 9 and be connected with one end of housing 1.Similarly, fluid effuser 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.The quantity of thermal-arrest pipeline can be arranged according to the capacity of heat collector.Preferably, the diameter of described thermal-arrest pipeline is 5-10mm, is preferably 7-8mm.The pipe thickness of thermal-collecting tube is 0.3mm-0.7mm, is preferably 0.4-0.5mm.Preferably, the inside of housing 1 vacuumizes.
Absorber plate 7 is arranged on the sensitive surface of solar thermal collector.Preferably, absorber plate 7 is close to the surface of pipeline 21, and undulate.Waveform absorber plate forms parallel slot type cavity, makes light enter rear formation light trapping, thus reaches better heat transfer effect.Absorber plate 7 surface coating coating for selective absorption (not shown), for absorbing solar visible light spectrum, reflects infrared light.Thermal radiation shield 8 is arranged at the shady face of heat collector 100, and now in example, thermal radiation shield 8 is one deck, in addition, can also arrange two-layer, more than three layers screen layer.This thermal radiation shield 8 adopts aluminium film, aluminium sheet or plated film corrosion resistant plate.Preferably, thermal radiation shield is close to the shady face of thermal-collecting tube and is fixed on fluid inflow pipe and fluid effuser.Thermal radiation shield 8 can significantly reduce black body radiation heat loss, improves collector efficiency.Preferably, housing 1 is also provided with vacuum pumping mouth (not shown), and housing 1 is vacuumized by vacuum pumping mouth, in addition, can also fill evaporable and/or nonevaporable getter in housing, to maintain the vacuum of vacuum chamber.Vacuum has lower gas conduction loss, enhances the photo-thermal efficiency of heat collector.
This parallel connection thermal-arrest pipeline 3 arranges with the tubule that n diameter is d, substitutes the monotube gathering heat pipe that tradition (the hot target of slot type) diameter is D=nd.
First, when total flow is identical, flow velocity improves n doubly, and coefficient of heat transfer h is:
h i = 0.023 λ d i ( ρud i μ ) m 0.8 ( C p μ λ ) m 0.4
If definition u is the flow velocity of the hot target of single tube, the single tube coefficient of heat transfer (hiD) with the ratio of the hot coefficient of comb (hid) is:
h i d h i D = ( nu i ) 0.8 / d 0.2 ( u i ) 0.8 / D 0.2 = n
Visible, when flow velocity is identical, doubly (establishing n=5), the low n of flow doubly for the hot target of oil film Temperature Difference Ratio single tube low (1/n) 0.2=1.37 of the hot target of comb; Pipeline caliber can significantly reduce, thus considerably reduces system pipeline thermal losses and systemic circulation pump power consumption.
In addition, owing to have employed corrugated plating heat-absorbing structure, the hot target of equivalent radiated power area ratio tradition single tube of the hot target of comb is low about 3 times, considerably reduces black body radiation heat loss.When focusing is than when little, this advantage of the hot target of comb is especially obvious on the impact of system effectiveness.
Although its vacuum insulating glass structure brings extra boundary reflection light loss (introducing glass tube with vacuum transmitance), but bring two large incomes: 1) because vacuum condition allows to adopt selective absorbing plated film, 2) forced convection and Natural Heat Convection loss is reduced, improve the heat stability of system, and be easy to safeguard.
Further, the utility model adopts coating for selective absorption to greatly reduce radiation, forced convection and free convection heat loss.Under vacuum condition, absorb plated film and can maintain a long-term stability harmless, thus improve the durability of system.
In addition, by adopting metal fluid inflow pipe and metal fluid effuser, make collector structure of the present utility model more simple and reliable.
Although by referring to some preferred embodiment of the present utility model, the utility model illustrated and describe, but those of ordinary skill in the art should be understood that and can do various change to it in the form and details, and does not depart from spirit and scope of the present utility model.

Claims (10)

1. a two-dimensional tracking formula focusing solar heat collector, is characterized in that, described heat collector comprises:
Housing, described housing is made up of transparent material;
Fluid inflow pipe, described fluid inflow pipe is connected with one end of described housing by an expansion joint;
Fluid effuser, described fluid effuser is connected with the other end of described housing by another expansion joint;
Many thermal-arrest pipelines, described thermal-arrest pipeline to be arranged in described housing and to be connected in parallel mutually, and the entrance of thermal-arrest pipeline described in each all flows into fluid communication with described fluid, and fluid communication is all flowed out in the outlet of thermal-arrest pipeline described in each with described fluid; And
Absorber plate, described absorber plate is close to the surface of described thermal-arrest pipeline, and the surface of described absorber plate is coated with coating for selective absorption.
2. heat collector according to claim 1, is characterized in that, the inside of described housing vacuumizes, and every root thermal-arrest pipeline is arranged perpendicular to described fluid inflow pipe and described fluid effuser.
3. heat collector according to claim 1, is characterized in that, the shady face of described thermal-arrest pipeline is provided with one deck, two-layer or three layers of thermal radiation shield, and this thermal radiation shield is coated reflection plate.
4. heat collector according to claim 1, is characterized in that, described fluid inflow pipe and described fluid effuser are metal tube.
5. heat collector according to claim 1, is characterized in that, described thermal-arrest pipeline is metal tube, and described housing is glass.
6. heat collector according to claim 1, is characterized in that, this thermal radiation shield is aluminium sheet or corrosion resistant plate of aluminizing, and this thermal radiation shield is fixed on fluid inflow pipe and fluid effuser.
7. heat collector according to claim 1, is characterized in that, described thermal-arrest pipeline parallel equidistant arrangement.
8. heat collector according to claim 1, is characterized in that, the diameter of described thermal-arrest pipeline is 5-10mm, and the pipe thickness of described thermal-arrest pipeline is 0.3mm-0.7mm.
9. heat collector according to claim 1, is characterized in that, is connected between described expansion joint with described housing by cutting down.
10. heat collector according to claim 1, is characterized in that, has filled and presented evaporable and/or nonevaporable getter in order to maintain the vacuum of vacuum chamber in described housing.
CN201520172881.5U 2015-03-25 2015-03-25 Two-dimensional tracking formula focusing solar heat collector Expired - Fee Related CN204593899U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106152548A (en) * 2015-03-25 2016-11-23 益科博能源科技(上海)有限公司 Two-dimensional tracking formula focusing solar heat collector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106152548A (en) * 2015-03-25 2016-11-23 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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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: 20150826

Termination date: 20200325