CN105626406B - Large-scale Dish solar thermal power system based on Brayton cycle - Google Patents
Large-scale Dish solar thermal power system based on Brayton cycle Download PDFInfo
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- CN105626406B CN105626406B CN201610049166.1A CN201610049166A CN105626406B CN 105626406 B CN105626406 B CN 105626406B CN 201610049166 A CN201610049166 A CN 201610049166A CN 105626406 B CN105626406 B CN 105626406B
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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
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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- Engine Equipment That Uses Special Cycles (AREA)
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Abstract
The invention discloses a kind of large-scale Dish solar thermal power system based on Brayton cycle, including light and heat collection subsystem and Brayton cycle electricity generation system；Wherein light and heat collection subsystem includes dish-style condenser and receiver；Brayton cycle electricity generation system includes combustion chamber, gas turbine, regenerator, compressor and generator；In dish-style condenser focusing sunlight to receiver, receiver converts light energy into thermal energy and is connected with regenerator and combustion chamber, and gas turbine is connect with combustion chamber and regenerator, and with compressor and generator coaxle.The dish-style condenser is the paraboloid of revolution, is made of the silver-plated bend glass in back, is used for solar light focusing to receiver.The present invention realizes Brayton cycle in the application of Dish solar thermal power system, and water consumption is greatly saved.
Description
Technical field
The present invention relates to a kind of solar energy systems, are based particularly on the large-scale disc type solar energy heat power generation system of Brayton cycle
System.
Background technique
Solar energy thermal-power-generating mainly includes slot type, tower, disk system, the technology of disc type solar energy solar-thermal generating system at
Ripe degree is lower than slot type and tower.But since it just starts to start to walk, thus its development potentiality is also to be far longer than slot type and tower
System.And the efficiency of disc type solar energy electricity generation system and using flexible will be higher than trough system and tower system, highest
Photoelectric conversion efficiency is up to 29.4%, and dish-style condenser can substantially reduce cost by standardizing large-scale production.
Bretton or Stirling cycle are generally used in disk system.Stirling-electric hybrid is mounted on dish by dish-style Stirling system
The near focal point of formula mirror, the big weight of volume is big, and operation risk is high, repairs relatively difficult.Brayton cycle structure is simple, with air
It is not undergone phase transition for medium, saves water resource, there is higher reliability.
Summary of the invention
Goal of the invention: a kind of based on cloth the technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide
The large-scale Dish solar thermal power system of thunder circulation.
In order to solve the above-mentioned technical problem, the large-scale disc type solar energy heat based on Brayton cycle that the invention discloses a kind of
Electricity generation system, including light and heat collection subsystem and Brayton cycle electricity generation system；
Wherein light and heat collection subsystem includes dish-style condenser and receiver；
Brayton cycle electricity generation system includes combustion chamber, gas turbine, regenerator, compressor and generator；
In dish-style condenser focusing sunlight to receiver, receiver converts light energy into thermal energy and regenerator and combustion chamber
Be connected, gas turbine is connect with combustion chamber and regenerator, and with compressor and generator coaxle.
The dish-style condenser is the paraboloid of revolution, is made of the silver-plated bend glass in back, for gathering sunlight
On coke to receiver.
The receiver is in the focal point of condenser always, and receiver uses heat pipe-type receiver, receiver outlet guide
Pipe is hose.
The dish-style condenser is large-scale dish-style condenser, and large-scale dish-style condenser is separated with receiver, to large-scale dish-style
Condenser is tracked, while receiver being placed on movable support and controls and receives device movement, and receiver is made to be in burnt always
At point.
The dish-style condenser includes the large-scale dish-style condenser of one group of small-sized dish-style mirror and one, small-sized dish-style mirror utilize with
On track device reflected sunlight to fixed large-scale dish-style condenser, large-scale dish-style condenser converges light to focal point again and fixes
Receiver.
The dish-style condenser includes the large-scale dish-style condenser of one group of small-sized dish-style mirror and one, large-scale dish-style condenser with
On track sun reflected sunlight to one group of confocal small-sized dish-style mirror, small-sized dish-style mirror converges light again and connects to focal point is fixed
It receives on device.
The Brayton cycle electricity generation system, air are directly entered regenerator by gas turbine after compressor adiabatic compression
High-temperature exhaust air heating, while into receiver heat again after high temperature and pressure working medium enter gas turbine insulation acting, drive
Coaxial electrical power generators, it is laggard in combustion chamber (3) combustion heating air using natural gas in no illumination and rainy weather
Enter gas turbine.
The present invention realizes continuous and stable electric generation, reduces cost, improves generating efficiency.This system use disc type solar energy for
Heat source, natural gas afterburning, therefore tower slot type formula system can be higher than with continuous and stable electric generation, efficiency.Relative to tower system,
Heliostat takes up a large area, and focal length is long, and heat loss is big, and can not standardized production, to increase cost.The investment of heliostat
Greater than 50% entirely invested.Dish-style condenser can substantially reduce cost by standardizing large-scale production.
The present invention realizes large-scale dish-style mirror and separates with receiver, reduces support construction intensity requirement, improves system
Balance and wind resistance.Generally conventional dish-style electricity generation system receiver is all connected with disc, is mounted on dish-style condenser
Focal point can cause connecting bracket bending deformation since this system is larger, receiver is made to be difficult to hold in focal point.Therefore,
It is separated using disc with receiver very necessary.
The present invention realizes the increase of single disc type solar energy electricity generation system capacity.Current common dish-style Stirling heat hair
Stirling-electric hybrid is usually mounted on the near focal point of dish-style mirror by electric system, since the big weight of volume is big, when considerably increasing solar tracking
System energy consumption, reduce the balance and wind resistance of system.And it is difficult to accomplish very in disc type solar energy electricity generation system
Greatly, the single electricity generation system of 25kw has reached the upper limit.Using Brayton cycle, and the technology that receiver is separated with dish-style mirror
The capacity of system can be increased.
The present invention realizes Brayton cycle in the application of Dish solar thermal power system, avoid Stirling thermal engine operating with
The direct-coupled complexity of receiver and Stirling thermal engine operating cost high life low disadvantage, are greatly saved water consumption.Dish-style is too
In positive energy Stirling engine generating system, Stirling-electric hybrid heat absorption working medium is directly flowed in heat dump, once it is damaged, it repairs relatively more tired
It is difficult.Manufacturing cost is high, and service life is low, has direct relation with its piston lubricating method.Brayton cycle structure is simple, it is only necessary to
One rotatable parts (compressor/generator/turbine), working medium is not undergone phase transition in cyclic process, has higher reliability,
Solar energy place abundant usually water resource is a lack of, and the cycle fluid of open type Brayton Heat Engine is air, does not need water
As cycle fluid, to save water consumption.
Detailed description of the invention
The present invention is done with reference to the accompanying drawings and detailed description and is further illustrated, of the invention is above-mentioned
And/or otherwise advantage will become apparent.
Fig. 1 is general structure schematic diagram of the present invention.
Fig. 2 is 1 structural schematic diagram of embodiment.
Fig. 3 is 2 structural schematic diagram of embodiment.
Fig. 4 is 3 structural schematic diagram of embodiment.
Specific embodiment
The technical solution of the present invention will be further described below with reference to the accompanying drawings.
Referring to attached drawing 1, a kind of large-scale Dish solar thermal power system based on Brayton cycle provided by the invention should
System includes: condenser 1, receiver 2, combustion chamber 3, gas turbine 4, regenerator 5, compressor 6, generator 7.
Sunlight reflection is converged to receiver 2 using tracking technique by condenser 1 in above-mentioned dish-style light and heat collection subsystem
On.1 section of condenser is paraboloid, is made of the silver-plated bend glass in back.Receiver 2 is heat pipe-type receiver, and work is situated between
Matter is alkali metallic sodium, has very low saturated vapour pressure and the higher latent heat of vaporization under the high temperature conditions.
One of three case study on implementation are selected about the connection type of dish-style condenser 1 and receiver 2.
Embodiment one:
Referring to attached drawing 2, large-scale dish-style condenser 11 is separated with receiver 2, using tracking device to large-scale dish-style condenser
11 are tracked, and tracking mode is polar axis tracking, can reduce the influence of solar elevation, improve light and heat collection efficiency, adopt
Use closed-loop control.Receiver 2 is placed on movable support simultaneously and controls and receives the movement of device 2 using follow-up control apparatus, makes to connect
It receives device 2 and is in focal point always.
Embodiment two: attached drawing 3 is shone, small-sized dish-style mirror 12 is several, and two signal index paths are drawn in figure.In each small-sized dish
Electronic control device device is provided on formula mirror 12, by follow-up control apparatus to solar control, servo motor drives small
Type dish-style mirror 12 rotates and the sunlight of receiving is reflexed to large-scale dish-style condenser 11, large-scale 11 converged light of dish-style condenser
The line receiver 2 fixed to focal point.
Embodiment three:
Referring to attached drawing 4, small-sized dish-style mirror 12 is several, and two signal index paths are drawn in figure.To large-scale dish-style condenser 11
It is tracked, the combined tracking mode that tracking system is combined using the program tracking and the photoelectric tracking of closed loop of open loop.It utilizes
The feedback information of sensor adjusts the position of condenser in time, and guarantee system can be stablized under any weather condition
Operation.12 on large-scale 11 focusing sunlight reflected sunlight of dish-style condenser to several confocal small-sized dish-style mirrors, small-sized dish-style
Mirror 12 is converged again on light to the fixed receiver 2 of focal point.
In above-mentioned Brayton cycle power generator, using air as medium, fired in regenerator 5 after the compression of compressor 6
The heating exhaust gas of gas-turbine 4, afterwards enter 2 reheating of receiver after in gas turbine 4 expansion work, drive coaxial generator 7
Power generation, the exhaust after acting enters regenerator 5, and in no illumination and rainy weather, using natural gas, in combustion chamber 3, burning adds
Enter gas turbine after hot-air.
The present invention devises the large-scale Dish solar thermal power system based on Brayton cycle, system energy-provision way are as follows:
Using dish-style condenser by solar light focusing to receiver, receiver converts light energy into thermal energy, provides for Brayton cycle
Heat heats air expansion work in the gas turbine, and coaxial generator is driven to complete power generation process in no illumination and yin
When rainy day gas, enters gas turbine after combustion chambers burn heats air using natural gas and do work.The present invention can provide stabilization
Continuous electric energy, it is high-efficient, it is easy for installation, there is very high reliability.
The thinking and method of the present invention provides a kind of large-scale Dish solar thermal power system based on Brayton cycle,
There are many method and the approach for implementing the technical solution, the above is only a preferred embodiment of the present invention, it is noted that
For those skilled in the art, without departing from the principle of the present invention, several change can also be made
Into and retouching, these modifications and embellishments should also be considered as the scope of protection of the present invention.Each component part being not known in the present embodiment
The available prior art is realized.
Claims (1)
1. the large-scale Dish solar thermal power system based on Brayton cycle, which is characterized in that including light and heat collection subsystem
With Brayton cycle electricity generation system；
Wherein light and heat collection subsystem includes dish-style condenser (1) and receiver (2)；
Brayton cycle electricity generation system includes combustion chamber (3), gas turbine (4), regenerator (5), compressor (6) and generator
(7)；
In dish-style condenser (1) focusing sunlight to receiver (2), receiver (2) converts light energy into thermal energy and regenerator (5)
Be connected with combustion chamber (3), gas turbine (4) is connect with combustion chamber (3) and regenerator (5), and with compressor (6) and generator
(7) coaxial；
The dish-style condenser (1) is the paraboloid of revolution, is made of the silver-plated bend glass in back, is used for solar light focusing
To on receiver (2)；
The receiver (2) is in the focal point of condenser (1) always, and receiver (2) uses heat pipe-type receiver, receiver
(2) delivery channel is hose；
The dish-style condenser (1) includes one group of small-sized dish-style mirror (12) and one large-scale dish-style condenser (11), large-scale dish-style
Condenser (11) tracks on sun reflected sunlight to one group of confocal small-sized dish-style mirror (12), and small-sized dish-style mirror (12) is converged again
On light to the fixed receiver (2) of focal point；
The Brayton cycle electricity generation system, air are directly entered regenerator (5) by combustion gas wheel after compressor (6) adiabatic compression
The high-temperature exhaust air of machine (4) heats, while entering high temperature and pressure working medium after receiver (2) are heated again and entering gas turbine (4) absolutely
Heat acting, drives coaxial generator (7) to generate electricity, and in no illumination and rainy weather, is fired using natural gas in combustion chamber (3)
Enter gas turbine after burning heating air.
Priority Applications (1)
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| CN201610049166.1A CN105626406B (en) | 2016-01-25 | 2016-01-25 | Large-scale Dish solar thermal power system based on Brayton cycle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610049166.1A CN105626406B (en) | 2016-01-25 | 2016-01-25 | Large-scale Dish solar thermal power system based on Brayton cycle |
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| CN105626406A CN105626406A (en) | 2016-06-01 |
| CN105626406B true CN105626406B (en) | 2018-12-14 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958514B (en) * | 2017-03-24 | 2019-07-16 | 国家电网公司 | A kind of solar heat power generation system in conjunction with combustion gas, Steam Power Circulation electricity generation system |
| CN111075668A (en) * | 2019-12-06 | 2020-04-28 | 中国科学院电工研究所 | Utilize electricity storage system of solid particle heat-retaining |
| CN111156139A (en) * | 2020-01-19 | 2020-05-15 | 至玥腾风科技集团有限公司 | Solar gas turbine power generation system based on photo-thermal principle |
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| CN101078610A (en) * | 2006-05-25 | 2007-11-28 | 孟英志 | High-energy light-gathering weapon system method and device |
| CN101655078A (en) * | 2009-08-19 | 2010-02-24 | 东南大学 | Solar combined power generating device and method |
| CN102103258A (en) * | 2011-02-25 | 2011-06-22 | 浙江大学 | Dish condensation-based solar energy secondary condensation frequency division method and device |
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