CN105953446A - Low-melting-point salt linear Fresnel type solar heat collecting system - Google Patents
Low-melting-point salt linear Fresnel type solar heat collecting system Download PDFInfo
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- CN105953446A CN105953446A CN201610421969.5A CN201610421969A CN105953446A CN 105953446 A CN105953446 A CN 105953446A CN 201610421969 A CN201610421969 A CN 201610421969A CN 105953446 A CN105953446 A CN 105953446A
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- Prior art keywords
- heat
- solar thermal
- linear fresnel
- salt
- collection system
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Classifications
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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
- F24S70/10—Details of absorbing elements characterised by the absorbing material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/006—Methods of steam generation characterised by form of heating method using solar heat
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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
- F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
-
- 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
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
- F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Sustainable Development (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to the field of solar condensation heat collecting system design, and discloses a low-melting-point salt linear Fresnel type solar heat collecting system. The structure is designed in an optimized manner, a linear Fresnel condensation system of an improved structure is utilized, low-melting-point nitrate good in high temperature stability is used as a heat absorption medium, the low solidification point of a system heat transfer medium is ensured while the temperature of the working medium output by the heat collecting system exceeds about 550 DEG C, and the technical risk of system solidification is remarkably lowered while the system heat energy is sufficiently utilized.
Description
Technical field
The present invention relates to solar energy light gathering and heat collecting systems design area, particularly a kind of low melting point salt linear Fresnel formula is too
Sun can collecting system.
Background technology
Solar energy, as the one of clean energy resource, has gradually obtained popularization and application.Such as, extensive light and heat collection generating
Deng.
Solar energy light gathering and heat collecting, according to spot mode, is divided into slot type, tower and linear Fresnel formula etc., the temperature of light and heat collection
Degree can reach 300 DEG C-1000 DEG C.
Linear Fresnel formula, as the one of solar energy light gathering and heat collecting system, has technical risk relatively low, and average annual efficiency occupies
In, to take up an area less, anti-blown sand ability is strong, the features such as construction cost is low, is suitable for China's western part climatic environment.
The most submitted patent of applying unit " solar energy high temperature heat energy output system " provides a kind of solar energy high temperature heat
Can system.In order to use solar energy to produce the heat energy of high temperature (> 500 DEG C), use linear Fresnel formula concentrating collector, heat transfer
Medium uses fuse salt, and simultaneity factor is furnished with heat storage can.Feature is, linear Fresnel system can be by improving primary event mirror
Jing Chang arrange, focusing ratio be made relatively big (> 100 ×) (with traditional trough system 80 × compared with), so so that collection
The system temperature of heat is increased to about 550 DEG C;For the high temperature of coupled system about 550 DEG C, collecting system uses melted nitre
Hydrochlorate is as heat transfer medium;System is furnished with heat reservoir, and heat reservoir medium uses and the molten nitrate of heat transfer medium system;
Owing to being furnished with heat reservoir, system can be with the output high temperature heat of continuous-stable.Owing to heat reservoir have employed and heat transfer medium
Identical nitrate, as heat-storage medium, simplifies heat-exchange system, improves efficiency so that the output of system is the most steady.
Owing to the system uses two yuan of nitrate as heat transfer medium, two yuan of nitrate fusing points higher (>=240 DEG C), be
The operation temperature of system need to be run at higher than 290 DEG C.There are two shortcomings in this system: 1, system operation low temperature is higher, heat energy profit
With insufficient;2, heat transfer medium fusing point is higher, and system exists the technical risk of heat transfer medium solidification.In order to anti-condensation, system early stage
Equipment investment is higher.
Summary of the invention
It is an object of the invention to provide a kind of low melting point salt linear Fresnel formula solar thermal collection system, in order to use too
Sun can produce the heat energy of high temperature (> 500 DEG C), uses linear Fresnel formula concentrating collector, and heat transfer medium uses molten low melting point
Salt (fusing point < 80 DEG C), simultaneity factor is furnished with heat storage can.Feature is, linear Fresnel system can be by improving primary event mirror
Jing Chang arrange, focusing ratio be made relatively big (> 100 ×) (with traditional trough system 80 × compared with), so so that collection
The system temperature of heat is increased to about 550 DEG C;For the high temperature of coupled system about 550 DEG C, collecting system uses melted nitre
Hydrochlorate is as heat transfer medium;System is furnished with heat reservoir, and heat reservoir medium uses and the molten nitrate of heat transfer medium system;
Owing to being furnished with heat reservoir, system can be with the output high temperature heat of continuous-stable.Owing to heat reservoir have employed and heat transfer medium
Identical nitrate, as heat-storage medium, simplifies heat-exchange system, improves efficiency so that the output of system is the most steady.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the invention discloses a kind of low melting point salt linearly luxuriant and rich with fragrance alunite
That formula solar thermal collection system, the outfan of solar thermal collection system is connected by pipeline with the outfan of the molten salt furnace of heat reservoir
Receive hot salt cellar input;The outfan of hot salt cellar is inputted by the inner tube of input and vaporizer that pipeline connects superheater
End;The outfan of superheater and the outfan of molten salt furnace are connected to the input of molten salt furnace by pipeline;The inner tube of vaporizer is defeated
Enter end and be connected to the input of preheater by pipeline;The input of the outfan of preheater and cold salt cellar and the output of molten salt furnace
End connection;The outfan of cold salt cellar connects with the input of solar thermal collection system with the input of molten salt furnace;Water inlet pipe is with pre-
The inner tube input connection of hot device, the input of the inner tube outfan connection vaporizer of preheater, the outfan connection of vaporizer
The inner tube input of superheater, the inner tube outfan connection jet chimney of superheater.
Wherein, solar thermal collection system is the collecting system that linear Fresnel formula solar concentrator is constituted, collecting system
It is molten nitrate with heat-absorbing medium;Heat reservoir uses molten nitrate as heat-storage medium;System output heat generating temperature is high
In 500 DEG C.
Wherein, the solar thermal collection system being made up of linear Fresnel formula condenser system is by primary event mirror and receptor group
Becoming, wherein receptor is made up of compound parabolic concentrator and vacuum heat collection pipe.
Wherein, receptor is made up of compound parabolic concentrator and single vacuum heat collection pipe, receptor convergence rate > 80%.
Wherein, solar thermal collection system optics geometry light concentrating times > 100 being made up of linear Fresnel formula condenser system
Times.
Wherein, the heat-absorbing medium of the solar thermal collection system being made up of linear Fresnel formula condenser system is molten nitrate
In one.
Wherein, heat-absorbing medium molten nitrate binary nitrate is 60%NaNO3:40%KNO3Or ternary nitrate is 53%
NaNO3:40%NaNO2:7%KNO3In a kind of fuse salt be 9-10 wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)
2:18-20wt% LiNO3Or be 9-10 wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt%
LiNO3: the one in 10wt%CaCO3.
Wherein, the heat-storage medium molten nitrate binary nitrate in molten salt heat storage system is 60%NaNO3:40%KNO3
Or ternary nitrate is 53%NaNO3:40%NaNO2:7%KNO3In one.
Wherein, the heat-absorbing medium in solar thermal collection system and the heat accumulation fuse salt in molten salt heat storage system are 9-10
wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt% LiNO3Or be 9-10 wt%NaNO3:50-
55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt% LiNO3: the one in 10wt%CaCO3.
Medium is identical, and is fuse salt 9-10wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt%
LiNO3Or be 9-10 wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt% LiNO3:10wt%CaCO3
In one.
Wherein, after solar energy is collected by collecting system, absorb through heat-absorbing medium, transport and store in heat reservoir to enter again
Enter the required heat energy of output after steam generating system.
The method have the advantages that
The present invention passes through Optimal Structure Designing, utilizes the linear Fresnel condenser system of improved structure, utilizes high-temperature stability good
Low melting point nitrate as heat-absorbing medium so that collecting system output Temperature of Working more than about 550 DEG C while, it is ensured that
The freezing point that system heat transfer medium is relatively low so that while system heat energy is fully used, significantly reduces the skill of system solidification
Art risk.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the present invention.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.
Embodiment 1
As it is shown in figure 1, the invention discloses a kind of low melting point salt linear Fresnel formula solar thermal collection system, solar energy heating system
The outfan of system is connected to hot salt cellar input with the outfan of the molten salt furnace of heat reservoir by pipeline;The outfan of hot salt cellar
Input and the inner tube input of vaporizer of superheater is connected by pipeline;The outfan of superheater and the outfan of molten salt furnace
The input of molten salt furnace it is connected to by pipeline;The inner tube input of vaporizer is connected to the input of preheater by pipeline;
The outfan of preheater connects with the outfan of molten salt furnace with the input of cold salt cellar;The outfan of cold salt cellar is defeated with molten salt furnace
Enter end to connect with the input of solar thermal collection system;Water inlet pipe connects with the inner tube input of preheater, the inner tube of preheater
The input of outfan connection vaporizer, the inner tube input of the outfan connection superheater of vaporizer, the inner tube of superheater is defeated
Go out end connection jet chimney.
Solar thermal collection system is the collecting system that linear Fresnel formula solar concentrator is constituted, and includes primary event
Mirror and receptor composition, wherein receptor is made up of compound parabolic concentrator and vacuum heat collection pipe, receptor convergence rate >
80%, the heat-storage medium fuse salt in heat-absorbing medium heat reservoir is 9-10 wt%NaNO3:50-55wt%KNO3:18-20wt%Ca
(NO3)2:18-20wt% LiNO3In one.
After solar energy is collected by collecting system, absorb through heat-absorbing medium, transport and store in heat reservoir and enter back into steaming
The required heat energy of output after vapour generation system;The solar thermal collection system optics geometry being made up of linear Fresnel formula condenser system gathers
Light multiple > 100 times, system output heat generating temperature is higher than 500 DEG C.
Embodiment 2
Experiment purpose and method: in order to verify effectiveness of the invention and feasibility, the present embodiment is with embodiment 1 as concrete structure
Design, carries out low melting point salt experiment.
Solar thermal collection system is the collecting system that linear Fresnel formula solar concentrator is constituted, and includes primary event
Mirror and receptor composition, wherein receptor is made up of compound parabolic concentrator and vacuum heat collection pipe, receptor convergence rate >
80%, the heat-storage medium fuse salt in heat-absorbing medium heat reservoir is 9-10 wt%NaNO3:50-55wt%KNO3:18-20wt%Ca
(NO3)2:18-20wt% LiNO3: the one in 10wt%CaCO3.
After solar energy is collected by collecting system, absorb through heat-absorbing medium, transport and store in heat reservoir and enter back into steaming
The required heat energy of output after vapour generation system;The solar thermal collection system optics geometry being made up of linear Fresnel formula condenser system gathers
Light multiple > 100 times, system output heat generating temperature is higher than 500 DEG C.
The above, the only present invention preferably detailed description of the invention, but protection scope of the present invention is not limited thereto,
Any those familiar with the art in the technical scope that the invention discloses, the change that can readily occur in or replacement,
All should contain within protection scope of the present invention.
Claims (10)
1. a low melting point salt linear Fresnel formula solar thermal collection system, it is characterised in that described solar thermal collection system
The outfan of molten salt furnace of outfan and described heat reservoir be connected to hot salt cellar input by pipeline;Hot salt cellar defeated
Go out end and connected input and the inner tube input of vaporizer of superheater by pipeline;The outfan of superheater is defeated with molten salt furnace
Go out end and be connected to the input of molten salt furnace by pipeline;The inner tube input of vaporizer is connected to the input of preheater by pipeline
End;The outfan of preheater connects with the outfan of molten salt furnace with the input of cold salt cellar;The outfan of cold salt cellar and molten salt furnace
Input connect with the input of solar thermal collection system;Water inlet pipe connects with the inner tube input of preheater, preheater
The input of inner tube outfan connection vaporizer, the inner tube input of the outfan connection superheater of vaporizer, superheater interior
Pipe outfan connection jet chimney.
2. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 1, it is characterised in that: described
Solar thermal collection system be linear Fresnel formula solar concentrator constitute collecting system, collecting system heat-absorbing medium is
Molten nitrate;Described heat reservoir uses molten nitrate as heat-storage medium;System output heat generating temperature is higher than 500
℃。
3. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 1 or 2, it is characterised in that:
The described solar thermal collection system being made up of linear Fresnel formula condenser system is made up of primary event mirror and receptor, wherein
Receptor is made up of compound parabolic concentrator and vacuum heat collection pipe.
4. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 3, it is characterised in that: described
Receptor be made up of compound parabolic concentrator and single vacuum heat collection pipe, receptor convergence rate > 80%.
5. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 3, it is characterised in that: described
Solar thermal collection system optics geometry light concentrating times > 100 times being made up of linear Fresnel formula condenser system.
6. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 2, it is characterised in that: described
The heat-absorbing medium of the solar thermal collection system being made up of linear Fresnel formula condenser system be the one in molten nitrate.
7. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 2, it is characterised in that: described
Heat-absorbing medium fuse salt be 9-10wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt% LiNO3Or
For 9-10 wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt% LiNO3: in 10wt%CaCO3
Kind.
8. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 2, it is characterised in that: described
Molten salt heat storage system in heat-storage medium fuse salt be 9-10 wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)
2:18-20wt% LiNO3Or be 9-10 wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt%
LiNO3: the one in 10wt%CaCO3.
9. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 2, it is characterised in that: described
Solar thermal collection system in heat-absorbing medium identical with the heat-storage medium in molten salt heat storage system, and be 9-10 for fuse salt
wt%NaNO3:50-55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt% LiNO3Or be 9-10 wt%NaNO3:50-
55wt%KNO3:18-20wt%Ca(NO3)2:18-20wt% LiNO3: the one in 10wt%CaCO3.
10. a kind of low melting point salt linear Fresnel formula solar thermal collection system as claimed in claim 1, it is characterised in that: institute
After the solar energy stated is collected by collecting system, absorb through heat-absorbing medium, transport and store in heat reservoir and enter back into steam and send out
After raw system, the required heat energy of output, realizes the maximum effect of this low melting point salt linear Fresnel formula solar thermal collection system.
Priority Applications (1)
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CN201610421969.5A CN105953446A (en) | 2016-06-14 | 2016-06-14 | Low-melting-point salt linear Fresnel type solar heat collecting system |
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CN201610421969.5A CN105953446A (en) | 2016-06-14 | 2016-06-14 | Low-melting-point salt linear Fresnel type solar heat collecting system |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107013427A (en) * | 2017-04-24 | 2017-08-04 | 百吉瑞(天津)新能源有限公司 | A kind of slot type solar-thermal generating system with self-circulation system |
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CN103074040A (en) * | 2013-01-01 | 2013-05-01 | 北京工业大学 | Mixed molten salt as heat transfer and storage medium low in melting point |
CN203394692U (en) * | 2013-08-28 | 2014-01-15 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Tower-type solar power generation system adopting two different molten salts |
CN103743273A (en) * | 2014-01-13 | 2014-04-23 | 北京工业大学 | Molten salt gravity-assisted heat pipe |
CN103850898A (en) * | 2012-11-30 | 2014-06-11 | 飞秒光电科技(西安)有限公司 | Groove type solar heat energy recycling system capable of condensing light |
CN104633961A (en) * | 2014-12-31 | 2015-05-20 | 兰州大成聚光能源科技有限公司 | Solar high-temperature heat output system |
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2016
- 2016-06-14 CN CN201610421969.5A patent/CN105953446A/en active Pending
Patent Citations (5)
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CN103850898A (en) * | 2012-11-30 | 2014-06-11 | 飞秒光电科技(西安)有限公司 | Groove type solar heat energy recycling system capable of condensing light |
CN103074040A (en) * | 2013-01-01 | 2013-05-01 | 北京工业大学 | Mixed molten salt as heat transfer and storage medium low in melting point |
CN203394692U (en) * | 2013-08-28 | 2014-01-15 | 中国电力工程顾问集团华北电力设计院工程有限公司 | Tower-type solar power generation system adopting two different molten salts |
CN103743273A (en) * | 2014-01-13 | 2014-04-23 | 北京工业大学 | Molten salt gravity-assisted heat pipe |
CN104633961A (en) * | 2014-12-31 | 2015-05-20 | 兰州大成聚光能源科技有限公司 | Solar high-temperature heat output system |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN107013427A (en) * | 2017-04-24 | 2017-08-04 | 百吉瑞(天津)新能源有限公司 | A kind of slot type solar-thermal generating system with self-circulation system |
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Application publication date: 20160921 |