CN110044080A - A kind of tower-type solar thermal power generating system based on chamber pillar heat collector - Google Patents
A kind of tower-type solar thermal power generating system based on chamber pillar heat collector Download PDFInfo
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- CN110044080A CN110044080A CN201910242367.7A CN201910242367A CN110044080A CN 110044080 A CN110044080 A CN 110044080A CN 201910242367 A CN201910242367 A CN 201910242367A CN 110044080 A CN110044080 A CN 110044080A
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- Prior art keywords
- absorbing pipe
- coating
- external
- selective absorption
- internal
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S70/00—Details of absorbing elements
- F24S70/20—Details of absorbing elements characterised by absorbing coatings; characterised by surface treatment for increasing absorption
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
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- Optical Elements Other Than Lenses (AREA)
Abstract
The present invention provides a kind of tower-type solar thermal power generating system based on chamber pillar heat collector, and the front and back temperature difference of absorbing pipe phototropic face and shady face can be effectively reduced.External absorbing pipe group opening and internal absorbing pipe group opening combine composition sector open, and sector open is towards nearly sun heliostat place；Between external absorbing pipe and internal absorbing pipe, in external absorbing pipe between adjacent two pipe, there are gaps between adjacent two pipe in internal absorbing pipe；Coating for selective absorption one is applied in the semi-circumference of the remote sun side of external absorbing pipe, coating for selective absorption two is applied in the semi-circumference of the nearly sun side of external absorbing pipe, coating for selective absorption three is applied in the semi-circumference of the remote sun side of internal absorbing pipe, and coating for selective absorption four is applied in the semi-circumference of the nearly sun side of internal absorbing pipe；The absorptivity of the coating for selective absorption three is lower than coating for selective absorption four；The absorptivity of the coating for selective absorption one is lower than coating for selective absorption two.
Description
Technical field
The present invention relates to a kind of tower-type solar thermal power generating systems based on chamber pillar heat collector.
Background technique
Nearest more than ten year, solar power generation are always the research hotspot of countries in the world, are held in the installation built and be completed
The annual growth kept up to 30% of amount.Typical tower type solar energy thermal power generation technology is because the pipeline used is short, focusing ratio is high, can produce
The steam of raw high parameter, thus generating efficiency with higher, and be rapidly developed.
Tower-type electricity generation Systems Theory focusing ratio is more than 1000, and the phototropic face of absorbing pipe needs to bear higher thermic load, and
Shady face is usually adiabatic heat-insulation structure.Therefore the absorbing pipe of unilateral light easily forms hot-spot, and there are larger temperature for front and back side
Difference, in the high region of heat flow density, the front and back temperature difference of absorbing pipe can be more than 200 DEG C, thus lead to the serious change of heat dump pipe
Shape, under the constraint of heat dump structure, heat dump pipe needs to bear very high stress, reduces the service life of absorbing pipe.Therefore it inhales
The main problem of hot device operation first is that how to obtain more uniform heat flux distribution, reduce absorbing pipe phototropic face and shady face
The front and back temperature difference.
Application No. is 201510095504.0 Chinese patents to disclose a kind of solar energy tower type heat absorption of biserial pipe structure
Device, including heat-absorbing model, the heat-absorbing model include outer ring absorbing pipe, inner ring absorbing pipe and sealing fin；Outer ring heat absorption
Manage between adjacent two pipe, between outer ring absorbing pipe and inner ring absorbing pipe there are certain interval, inner ring absorbing pipe by solid matter or
Fin structure connects in groups, and the sunlight received to the solar energy tower type heat dump of the biserial pipe structure plays sealing and heat transfer
Effect.There are certain intervals between the adjacent two tubes of outer ring absorbing pipe, are irradiated to part sunlight by gap
On inner ring absorbing pipe.A part of sunlight that inner ring absorbing pipe receives absorbs heat to outer ring by way of reflection or heat radiation
The latter half of pipe is heated, it is possible thereby to effectively reduce the front and back temperature difference of heat absorption tube wall, is reached and is reduced thermal stress, extends and inhale
The purpose in hot device service life.But it has the disadvantage that outer ring absorbing pipe and inner ring absorbing pipe only towards the semi-circumference ability of Jing Chang
There is direct sunlight, there was only reflected sunlight not towards the semi-circumference of Jing Chang, and the shady face of inner ring absorbing pipe is not any
It is heated, therefore although absorbing pipe hot-spot problem obtains a degree of containment, but before absorbing pipe phototropic face and shady face
The temperature difference is still difficult to reach an ideal degree afterwards.
Summary of the invention
It is an object of the invention to overcome the above deficiencies in the existing technologies, and provide a kind of reasonable in design
Based on the tower-type solar thermal power generating system of chamber pillar heat collector, the front and back of absorbing pipe phototropic face and shady face can be effectively reduced
The temperature difference.
Technical solution used by the present invention solves the above problems is: a kind of tower type solar based on chamber pillar heat collector
Heat generating system, including heat collector and heliostat field；Heat collector includes external absorbing pipe group and internal absorbing pipe group, outside heat absorption
Pipe group is made of external absorbing pipe, and internal absorbing pipe group is made of internal absorbing pipe, and external absorbing pipe is arranged in internal absorbing pipe
Outside；The heliostat field is divided into nearly sun heliostat place and remote sun heliostat place；It is characterized by: described
Closely entire heliostat field is divided into two pieces of fan-shaped regions by sun heliostat place and remote sun heliostat place；The external suction
Heat pipe heat is provided with external absorbing pipe group opening, and internal absorbing pipe group is provided with internal absorbing pipe group opening, external absorbing pipe group
Opening and internal absorbing pipe group opening combine composition sector open, and sector open is towards nearly sun heliostat place；Described is outer
Between portion's absorbing pipe and internal absorbing pipe, in external absorbing pipe between adjacent two pipe, in internal absorbing pipe between adjacent two pipe
There are gaps；The heat collector further includes coating for selective absorption one, coating for selective absorption two, coating for selective absorption three
With coating for selective absorption four；Coating for selective absorption one is applied in the semi-circumference of the remote sun side of external absorbing pipe, and selectivity is inhaled
It receives coating two to be applied in the semi-circumference of the nearly sun side of external absorbing pipe, coating for selective absorption three is applied to the remote sun of internal absorbing pipe
In the semi-circumference of side, coating for selective absorption four is applied in the semi-circumference of the nearly sun side of internal absorbing pipe；The selectivity is inhaled
The absorptivity for receiving coating three is lower than coating for selective absorption four；The absorptivity of the coating for selective absorption one is inhaled than selectivity
It is low to receive coating two.
External absorbing pipe group of the present invention and internal absorbing pipe group are arranged concentrically.
External absorbing pipe of the present invention constitutes steam vaporizer, and the inside absorbing pipe constitutes steam superheater.
The angle of sector open of the present invention is identical with the angle of the fan-shaped region of nearly sun heliostat place.
External absorbing pipe of the present invention and internal absorbing pipe are distributed in stagger arrangement.
Compared with prior art, the present invention having the following advantages that and effect:
(1) sector open makes internal absorbing pipe and external absorbing pipe that complete shady face, internal absorbing pipe and outside be not present
The whole circumference of absorbing pipe has direct sunlight, and the heat flux distribution of absorbing pipe circumferential surface is more uniform, and heat absorption can be effectively reduced
The front and back temperature difference of pipe phototropic face and shady face reaches an ideal degree, reduces the selection to absorbing pipe material
It is required that and then reduce heat collector initial cost cost.
(2) internal absorbing pipe, external absorbing pipe correspond to different zones heliostat field, and heliostat field tracing control is effectively reduced
System difficulty.
(3) the part radiation loss that internal absorbing pipe, external absorbing pipe can mutually absorb other side improves the thermal effect of heat collector
Rate.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the heat collecting module of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of heliostat field of the embodiment of the present invention.
Fig. 3 is the heated schematic diagram of absorbing pipe and internal absorbing pipe outside the embodiment of the present invention.
Fig. 4 is the structural schematic diagram of absorbing pipe outside the embodiment of the present invention.
Fig. 5 is the structural schematic diagram of absorbing pipe inside the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Referring to attached drawing 1- Fig. 5, the embodiment of the present invention includes heat collectors and heliostat field.
Heliostat field is divided into nearly sun heliostat place 4 and remote sun heliostat place 5, nearly sun heliostat place 4
Heliostat cosine losses are bigger than the heliostat of remote sun heliostat place 5, therefore remote sun heliostat place 5 can be arranged the settled date more
Mirror, so as to improve the reflection efficiency of entire heliostat.Nearly sun heliostat place 4 and remote sun heliostat place 5 will entirely determine
Solar eyepiece field is divided into two pieces of fan-shaped regions, and the angle that nearly sun heliostat place 4 is formed by fan-shaped region is θ 2, thus the remote sun
The angle that heliostat place 5 is formed by fan-shaped region is 360 ° of-θ 2.
Heat collector includes external absorbing pipe group, internal absorbing pipe group, coating for selective absorption 1, coating for selective absorption
2 12, coating for selective absorption 3 21 and coating for selective absorption 4 22.External absorbing pipe group is made of external absorbing pipe 1, interior
Portion's absorbing pipe group is made of internal absorbing pipe 2.
The outside of internal absorbing pipe 2 is arranged in external absorbing pipe 1, and external absorbing pipe 1 and internal absorbing pipe 2 are in stagger arrangement point
Cloth.
External absorbing pipe group and internal absorbing pipe group are arranged concentrically.External absorbing pipe group is an outer surface by light type thermal-arrest
While device absorbs solar energy, and a cavity body structure is constructed for internal absorbing pipe 2, such inside and outside two parts absorbing pipe
Radiation heat loss can mutually absorb, and improve the heat collector thermal efficiency；Internal absorbing pipe group is similar to a cavity type heat collector.The above knot
It is configured to a kind of novel cavity pillar heat collector, which had both had cylinder external surface light type heat collector sufficiently sharp
The advantages of with the land area for collecting thermal tower surrounding, and there is the radiation of cavity type heat collector and heat loss through convection to lose small advantage, because
This can significantly improve the thermal efficiency of entire heat collector.External absorbing pipe group is provided with external absorbing pipe group opening, inside heat absorption
Pipe group is provided with internal absorbing pipe group opening, and external absorbing pipe group opening and internal absorbing pipe group opening combine composition sector open
3, the angle of sector open 3 is θ 1.
Between external absorbing pipe 1 and internal absorbing pipe 2, in external absorbing pipe 1 between adjacent two pipe, in internal absorbing pipe 2
There are gaps between adjacent two pipe.
When using water as heat-transfer working medium, external absorbing pipe 1 constitutes steam vaporizer, preheating and steaming for low temperature feedwater
Hair heating, internal absorbing pipe 2 constitute steam superheater, are converted to superheated steam for saturated vapor.Working fluid evaporation section and overheat
Duan Duli arrangement, so that entire endothermic system is simpler, economic, safe；Meanwhile it can be by adjusting 3 angle, θ 1 of sector open
To distribute external absorbing pipe 1 and the received solar radiation heat of internal absorbing pipe 2, the hydrodynamic force that working medium exchanges heat in guarantee heat collector
Stability.It is apparent from, the heating heat that outer preheating and evaporation heating need is much larger than superheat, therefore sector open 3 is towards close
Sun heliostat place 4, remote sun heliostat place 5 are matched with external absorbing pipe 1, and nearly sun heliostat place 4 is inhaled with internal
Heat pipe 2 matches.The corresponding different zones heliostat field of external absorbing pipe 1, internal absorbing pipe 2, can be effectively reduced heliostat field with
Track control system difficulty, meanwhile, external inhale can be distributed by adjusting the angle, θ 2 of the fan-shaped region of nearly sun heliostat place 4
Heat pipe 1 and the received solar radiation heat of internal absorbing pipe 2, further enhance the hydrodynamic stability that working medium exchanges heat in heat collector
Property.3 angle, θ 1 of sector open and the fan-shaped region angle, θ 2 of nearly sun heliostat place 4 are identical, improve the efficiency for absorbing thermal energy.
3 angle, θ 1 of sector open, nearly sun heliostat place 4 fan-shaped region angle, θ 2 can synchronous adjustment, enhance entire heat-exchange system
Flexibility and safety.
Coating for selective absorption 1 is applied in the semi-circumference of the remote sun side of external absorbing pipe 1, coating for selective absorption two
12 are applied in the semi-circumference of the nearly sun side of external absorbing pipe 1, and coating for selective absorption 3 21 is applied to the remote sun side of internal absorbing pipe 2
Semi-circumference on, coating for selective absorption 4 22 is applied in the semi-circumference of the nearly sun side of internal absorbing pipe 2.
Coating for selective absorption 1 is different with the absorptivity of coating for selective absorption 2 12, coating for selective absorption 3 21
It is different with the absorptivity of coating for selective absorption 4 22.Due to 3 jiaos of sector open in the semi-circumference of the nearly sun side of internal absorbing pipe 2
The reason of spending, and the heliostat cosine losses of nearly sun heliostat place 4 are bigger than the heliostat of remote sun heliostat place 5, closely
The light that sun side mirror field itself is reflected is just few, therefore coating for selective absorption 4 22 may be configured as high-absorbility, and absorptivity can be set
It is set to 0.9；5 mirror field cosine losses of remote sun heliostat place are small, and Jing Chang is big, in the semi-circumference of the remote sun side of internal absorbing pipe 2
3 21 absorptivity of coating for selective absorption it is lower than coating for selective absorption 4 22, be set as 0.6-0.7, absorbing pipe internal in this way
2 circumferential heat flux distribution uniformities increase；Unabsorbed sunlight can be by the half of the nearly sun side of external absorbing pipe 1 by reflection
Circumference absorbs, and solar energy does not lose.In order to which more reflected lights can be absorbed in the semi-circumference of the nearly sun side of external absorbing pipe 1,
Coating for selective absorption 2 12 may be configured as high-absorbility, and absorptivity may be configured as 0.9, so the circumferential heat of external absorbing pipe 1
Uniformity is more preferable；In the semi-circumference of the remote sun side of external absorbing pipe 1, Jing Chang is big, and it is more to be absorbed into solar energy, from circumferential uniformity
It sees, one 11 absorptivity of coating for selective absorption is lower than coating for selective absorption 2 12,0.8 is set as, although total solar energy can damage
It loses, but circumferential heat flux distribution uniformity is more preferable.
For external absorbing pipe 1, it is that remote sun heliostat place 5 is reflected too that the semi-circumference of remote sun side, which receives energy,
Positive incident light, it is three parts that the semi-circumference of nearly sun side, which receives energy, and first part is the reflection of nearly sun heliostat place 4
The sun incident light that sunlight is irradiated by the gap between adjacent two pipe in internal absorbing pipe 2, second part are fixed for the remote sun
The sun incident light that solar eyepiece place 5 is reflected is irradiated to internal absorbing pipe 2 by the gap between adjacent two pipe of external absorbing pipe 1
The reflected light of the semi-circumference of remote sun side, Part III are the heat radiation of the semi-circumference of the remote sun side of internal absorbing pipe 2.For interior
Portion's absorbing pipe 2, it is three parts that the semi-circumference of remote sun side, which receives energy, and first part is the reflection of remote sun heliostat place 5
Sunlight by the sun incident light of the gap irradiation between adjacent two pipe in external absorbing pipe 1, second part is the nearly sun
The sun incident light that heliostat place 4 is reflected is irradiated to external heat absorption by the gap between adjacent two pipe in internal absorbing pipe 2
The reflected light of the semi-circumference of the nearly sun side of pipe 1, Part III is the heat radiation of the semi-circumference of the nearly sun side of external absorbing pipe 1, interior
The semi-circumference of the nearly sun side of portion's absorbing pipe 2 receives the sun incident light that energy is the reflection of nearly sun heliostat place 4.Outside heat absorption
Pipe 1, the heated situation of internal absorbing pipe 2 are as shown in table 1.
The heated situation of 1 outside absorbing pipe 1 of table, internal absorbing pipe 2
As it can be seen from table 1 external absorbing pipe 1, the remote sun side semi-circumference of internal absorbing pipe 2, nearly sun side semi-circumference receive
Heat have sun incident light, there is no absolute shady face, the circumferential heat flux distribution of external absorbing pipe 1, internal absorbing pipe 2
Uniformity improves.By optimizing the gap between external absorbing pipe 1 and internal absorbing pipe 2, adjacent two pipe in external absorbing pipe 1
Between gap, the gap in internal absorbing pipe 2 between adjacent two pipe, external absorbing pipe 1 and the caliber specification of internal absorbing pipe 2 etc.
Method, distribution are irradiated to external absorbing pipe 1 and the solar radiation quantity on internal absorbing pipe 2, make external absorbing pipe 1, internal heat absorption
The inhomogeneities of the circumferential heat flux distribution of pipe 2 further decreases.
In addition, by adjusting coating for selective absorption 1, coating for selective absorption 2 12, coating for selective absorption three
21, the absorptivity and reflectivity of coating for selective absorption 4 22, can further increase external absorbing pipe 1, inside absorbing pipe 2 weeks
To heat flux distribution uniformity, be effectively reduced the temperature difference of absorbing pipe circumferential direction, and then reduce the selection requirement of absorbing pipe material, reduce
The initial cost cost of heat collector.Meanwhile external absorbing pipe 1, internal absorbing pipe 2 mutually absorb the part radiation loss of other side, it can
To further increase the thermal efficiency of heat collector.It, can specific aim according to the actual temperature characteristic of external absorbing pipe 1, internal absorbing pipe 2
Different tubing is selected, the initial cost cost of heat collector is further decreased.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different, and above content is only to structure of the invention example explanation described in this specification.It is all according to
According to equivalence changes or simple change that the invention patent design structure, feature and principle is done, it is included in this hair
In the protection scope of bright patent.Those skilled in the art can do described specific embodiment various
The mode that the modify or supplement or adopt of various kinds is similar substitutes, and without departing from structure of the invention or surmounts present claims
Range defined in book, is within the scope of protection of the invention.
Claims (5)
1. a kind of tower-type solar thermal power generating system based on chamber pillar heat collector, including heat collector and heliostat field；Heat collector
Including external absorbing pipe group and internal absorbing pipe group, external absorbing pipe group is made of external absorbing pipe, and internal absorbing pipe group is by interior
The outside of internal absorbing pipe is arranged in portion's absorbing pipe composition, external absorbing pipe；The heliostat field is divided into nearly sun heliostat
Place and remote sun heliostat place；It is characterized by: the nearly sun heliostat place and remote sun heliostat place will
Entire heliostat field is divided into two pieces of fan-shaped regions；The external absorbing pipe group is provided with external absorbing pipe group opening, and inside is inhaled
Heat pipe heat is provided with internal absorbing pipe group opening, and external absorbing pipe group opening and internal absorbing pipe group opening combine composition sector to open
Mouthful, sector open is towards nearly sun heliostat place；Between the external absorbing pipe and internal absorbing pipe, in external absorbing pipe
There are gaps between adjacent two pipe between adjacent two pipe, in internal absorbing pipe；The heat collector further includes selective absorbing
Coating one, coating for selective absorption two, coating for selective absorption three and coating for selective absorption four；Coating for selective absorption one applies
In in the semi-circumference of the remote sun side of external absorbing pipe, coating for selective absorption two is applied to the semi-circumference of the nearly sun side of external absorbing pipe
On, coating for selective absorption three is applied in the semi-circumference of the remote sun side of internal absorbing pipe, and coating for selective absorption four is applied to inside
In the semi-circumference of the nearly sun side of absorbing pipe；The absorptivity of the coating for selective absorption three is lower than coating for selective absorption four；
The absorptivity of the coating for selective absorption one is lower than coating for selective absorption two.
2. the tower-type solar thermal power generating system according to claim 1 based on chamber pillar heat collector, it is characterised in that: institute
The external absorbing pipe group and internal absorbing pipe group stated are arranged concentrically.
3. the tower-type solar thermal power generating system according to claim 1 based on chamber pillar heat collector, it is characterised in that: institute
The external absorbing pipe stated constitutes steam vaporizer, and the inside absorbing pipe constitutes steam superheater.
4. the tower-type solar thermal power generating system according to claim 1 based on chamber pillar heat collector, it is characterised in that: institute
The angle for the sector open stated is identical with the angle of the fan-shaped region of nearly sun heliostat place.
5. the tower-type solar thermal power generating system according to claim 1 based on chamber pillar heat collector, it is characterised in that: institute
The external absorbing pipe and internal absorbing pipe stated are distributed in stagger arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242367.7A CN110044080B (en) | 2019-03-28 | 2019-03-28 | Tower type solar thermal power generation system based on cavity column type heat collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242367.7A CN110044080B (en) | 2019-03-28 | 2019-03-28 | Tower type solar thermal power generation system based on cavity column type heat collector |
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| Publication Number | Publication Date |
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| CN110044080A true CN110044080A (en) | 2019-07-23 |
| CN110044080B CN110044080B (en) | 2020-07-14 |
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| CN201910242367.7A Active CN110044080B (en) | 2019-03-28 | 2019-03-28 | Tower type solar thermal power generation system based on cavity column type heat collector |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111156712A (en) * | 2020-01-03 | 2020-05-15 | 西安交通大学 | Double-sided heat collection composite solar heat absorber and method |
| CN111981710A (en) * | 2020-05-26 | 2020-11-24 | 浙江大学 | Tower type solar heat absorber with heat storage capacity |
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| CN110044080B (en) | 2020-07-14 |
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