CN104613656B - Linear Fresnel formula solar energy heating reaction unit - Google Patents
Linear Fresnel formula solar energy heating reaction unit Download PDFInfo
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- CN104613656B CN104613656B CN201510034202.2A CN201510034202A CN104613656B CN 104613656 B CN104613656 B CN 104613656B CN 201510034202 A CN201510034202 A CN 201510034202A CN 104613656 B CN104613656 B CN 104613656B
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- linear fresnel
- solar energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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Abstract
The invention discloses a kind of linear Fresnel formula solar energy heating reaction unit, including variable area linear Fresnel illuminator group and reducing thermal-arrest reaction tube, this reducing thermal-arrest reaction tube is fixed on the focal line position of each illuminator in this variable area linear Fresnel illuminator group, this reducing thermal-arrest reaction tube carries out becoming caliber along tube side and arranges, the mirror area of this variable area linear Fresnel illuminator group is along tube side nonuniform mutation operator.Being mutually matched along tube side Changing Pattern of variable area linear Fresnel illuminator group and reducing thermal-arrest reaction tube, the common purpose realizing when receiving irradiation along tube side regulation optically focused.The present invention can be used as reaction unit or the heat collector of solar energy live (open) steam heat generating system of solar heat chemical system.When receive irradiation by regulation optically focused to be distributed along tube side, the concrete Rational Matching of Parameters such as response characteristic, working medium state with in pipe, it is achieved energy efficient converts and transmission, reduces loss.Meanwhile, it is high that this invention also has reliability, advantage with low cost.
Description
Technical field
The invention belongs to solar energy-heat utilization technology field, be specifically related to a kind of linear Fresnel formula too
Sun can collect thermal reaction apparatus.
Background technology
Owing to social development increases day by day for energy demand, fossil energy is asked for environmental pollution in addition
Increasingly sharpening of topic, greatly develops regenerative resource and has become as the urgent needs that China is current.
Middle temperature solar solar thermal utilization is the important component part of field of renewable energy resource utilization, mainly wraps
Include solar heat chemical utilization and solar energy thermal-power-generating utilization etc., specifically refer to be focused into solar radiation
It is the thermal source of 300～500 DEG C, is fuel by thermochemical study or adds vapours and sent out by steam turbine
Electricity utilizes.
At present, parabolic trough type is temperature solar heat utilization technology in one the most ripe, in transconversion into heat
Learn and applied with hot power field.Its focus version belongs to line focus, and optical concentration is than scope substantially
It is 20～90.This technology is used for heat chemistry field, relates to alcohols or the reformation of alkanes and pyrolytic reaction more,
Separate the most further after producing synthesis gas or directly use, reforming and pyrolytic reaction is required to catalysis
Agent participates in.But owing to reactant gradually decreases along tube side, partial pressure reduces, causes reaction to ease up problem；
Meanwhile, focused solar energy heat consumption reduces, and reaction temperature is gradually increasing, and catalyst performance reduces,
Further result in reaction efficiency to reduce.This technology for heat generating time many employings conduction oil as heat transfer work
Matter, but heat-conductive-oil high-temperature decomposition restriction (＜ 400 DEG C) limits superheated steam parameter, and then constrain
System generating efficiency；Also have directly to adopt and use water as working medium, but this new technique is the most ripe, deposits
, Liquid-vapor two-phase flow poor in system reliability be dynamic controls that difficulty is big and the circumferential thermal stress of thermal-collecting tube etc. is asked
Topic.The problem that windage is excessive it addition, groove type heat collector there is also, wind resistance is poor.At present, above-mentioned relate to
And to collection thermal response problem all do not improve in parabolic trough type technology solution.
Linear Fresnel focusing technology is the novel focus version of one fast-developing in recent years, and it utilizes
Fresnel illuminator group carries out thermal-arrest after optically focused.Owing to parabolic trough type and linear Fresnel formula are focusing on shape
Belonging to line focus in formula together, operation principle is identical, thus has similar performance and application scenario.Meanwhile,
This kind of technology has again unique advantage: on the one hand, compared with parabolic trough type heat collector, and linear Fresnel
The thermal-collecting tube of formula heat collector maintains static, and illuminator group is placed in position near the ground, thus there is operation can
The remarkable advantage high by property, wind resistance is good；On the other hand, due to Fresnel illuminator group by area relatively
Little flat mirror parallel array composition and in groups linkage work, thus adjust the illuminator group before and after flow process
Plane mirror number will not increase any cost in principle, it is possible to is when connect by flexible optically focused
Receive irradiation to be distributed along tube side, be allowed to and manage the Rational Parameters such as interior concrete response characteristic, working medium state
Join, it is achieved energy efficient converts and transmission, reduces loss.
In consideration of it, linear Fresnel technology is carried out becoming illuminator area and becoming thermal-collecting tube Guan Jing by the present invention
Improvement, and extend to solar heat chemistry/hot power generation applications field.
Summary of the invention
(1) to solve the technical problem that
In view of this, the invention provides a kind of linear Fresnel formula solar energy heating reaction unit, with
Expand the range of application of linear Fresnel focusing technology, and solve conventional linear Fresnel focusing technology and exist
The unmatched problem of local energy supply and demand during heat chemistry/thermal-arrest.
(2) technical scheme
For reaching above-mentioned purpose, the invention provides a kind of linear Fresnel formula solar energy heating reaction dress
Put, including variable area linear Fresnel illuminator group 1 and reducing thermal-arrest reaction tube 2, wherein: this change
Footpath thermal-arrest reaction tube 2 is fixed on the focal line of each illuminator in this variable area linear Fresnel illuminator group 1
Position, this reducing thermal-arrest reaction tube 2 carries out becoming caliber along tube side and arranges, this variable area linear Fresnel
The mirror area of illuminator group 1 is along tube side nonuniform mutation operator.
In such scheme, described variable area linear Fresnel illuminator group 1 and described reducing collection thermal response
Being mutually matched along tube side Changing Pattern of pipe 2, common realization when receives irradiation along tube side regulation optically focused
Amount.
In such scheme, the mirror area of described variable area linear Fresnel illuminator group 1, is by changing
Become illuminator number in a group and realize mirror area along tube side nonuniform mutation operator.
In such scheme, when being applied to solar heat chemical system, this linear Fresnel formula solar energy
Collection thermal reaction apparatus is as reaction unit.In this linear Fresnel formula solar energy heating reaction unit, become
The area of the linear Fresnel illuminator of area linear Fresnel illuminator group 1 gradually decreases along tube side,
And the caliber of this reducing thermal-arrest reaction tube 2 is gradually reduced along tube side, to adapt to local response speed along pipe
The feature that journey is gradually reduced.
In such scheme, when being applied to solar energy live (open) steam heat generating system, this linear Fresnel
Formula solar energy heating reaction unit is as heat collector.This linear Fresnel formula solar energy heating reaction dress
In putting, the area of the linear Fresnel illuminator of variable area linear Fresnel illuminator group 1 is along tube side first
Reduce after increase, and the caliber of this reducing thermal-arrest reaction tube 2 is along tube side first increases and then decreases, to adapt to
Local Condensing Heat Transfer Coefficients at preheating section, evaporator section and superheat section along the feature of tube side first increases and then decreases.
(3) beneficial effect
From technique scheme it can be seen that the method have the advantages that
1, the linear Fresnel formula solar energy heating reaction unit that the present invention provides, its linear Fresnel
Illuminator area and thermal-arrest reaction tube caliber can change along tube side, thus regulate optically focused and when receive irradiation
Measure and be distributed along tube side, the concrete Rational Matching of Parameters such as response characteristic, working medium state with in pipe, it is achieved energy
Amount Efficient Conversion and transmission, reduce loss.
2, the linear Fresnel formula solar energy heating reaction unit that the present invention provides, can not increase into
Realize redistributing along tube side of focused solar energy on the premise of Ben, thus realize flow process flexible and efficiently
Reconstruct and optimization.
3, the linear Fresnel formula solar energy heating reaction unit that the present invention provides, its thermal-arrest reaction tube
Maintain static, for there is the complicated applications occasion such as catalytic reaction, biphase gas and liquid flow in pipe, can be significantly
Improve system reliability and stability, and further process optimization.
4, the linear Fresnel formula solar energy heating reaction unit that the present invention provides, owing to illuminator is
Flat mirror parallel array and in groups linkage work, thus parabolic trough type technical units mirror area cost relatively
Lower.
5, the linear Fresnel formula solar energy heating reaction unit that the present invention provides, due to illuminator battle array
Row tight distribution, thus parabolic trough type technological system relatively is arranged compacter, improves unit building
Area utilization.
6, the linear Fresnel formula solar energy heating reaction unit that the present invention provides, owing to illuminator is equal
It is layed in position near the ground, thus parabolic trough type technology relatively is significantly reduced front face area, thus drop
Low air resistance coefficient.
Accompanying drawing explanation
The schematic diagram of the linear Fresnel formula solar energy heating reaction unit that Fig. 1 provides for the present invention；Its
In, each parts and respective markers be: 1-variable area linear Fresnel illuminator；2-reducing collection thermal response
Pipe.
Fig. 2 is the linear Fresnel formula solar energy alcohol reforming thermal chemical reaction according to the embodiment of the present invention
System runs schematic diagram；Wherein, each parts and respective markers are: 1-linear Fresnel formula reaction unit；
2-regenerator；3-condenser；4-cooling tower；5-gas-liquid separator；6-circulating pump；7-vaporizer.
Fig. 3 is the linear Fresnel formula solar energy live (open) steam heat generating system according to the embodiment of the present invention
Run schematic diagram；Wherein, each parts and respective markers are: 1-linear Fresnel formula heat collector；2-
Steam turbine；3-electromotor；4-condenser；5-cooling tower；6-oxygen-eliminating device；7-preheater；8-pressurization follows
Ring pump.
Fig. 4 is a kind of linear Fresnel formula solar energy heating reaction unit according to the embodiment of the present invention
Structural representation；Wherein, each parts and respective markers are: 1-variable area linear Fresnel illuminator；
2-reducing thermal-collecting tube；3-composite parabolic illuminator；4-glass cover；5-selects absorbing coating；6-
Stainless steel tube；7-catalyst.
Fig. 5 is the another kind of linear Fresnel formula solar energy heating reaction unit according to the embodiment of the present invention
Structural representation；Wherein, each parts and respective markers are: 1-variable area linear Fresnel illuminator；
2-reducing thermal-collecting tube；3-glass bushing；4-vacuum layer；5-selects absorbing coating；6-stainless steel tube；
7-catalyst.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with concrete real
Execute example, and referring to the drawings, the present invention is described in more detail.
The schematic diagram of the linear Fresnel formula solar energy heating reaction unit that Fig. 1 provides for the present invention, should
Linear Fresnel formula solar energy heating reaction unit includes variable area linear Fresnel illuminator group 1 and becomes
Footpath thermal-arrest reaction tube 2, this reducing thermal-arrest reaction tube 2 is fixed on this variable area linear Fresnel illuminator
The focal line position of each illuminator in group 1, this reducing thermal-arrest reaction tube 2 carries out becoming caliber along tube side and arranges,
The mirror area of this variable area linear Fresnel illuminator group 1 is along tube side nonuniform mutation operator.Variable area is linear
Being mutually matched along tube side Changing Pattern, jointly of Fresnel illuminator group 1 and reducing thermal-arrest reaction tube 2
Realize when receiving the purpose of irradiation along tube side regulation optically focused.
With reference to Fig. 1, the mirror area of variable area linear Fresnel illuminator group 1, is by changing one group
Interior illuminator number makes mirror area along tube side nonuniform mutation operator.It is on same workflow position
Group Fresnel illuminator carries out solar radiation tracking jointly by linkage, and illuminator group area is along pipe
Journey can change, and i.e. makes mirror area along the non-homogeneous cloth of tube side by illuminator number in changing a group
Put.This reducing thermal-arrest reaction tube 2 is fixed in this variable area linear Fresnel illuminator group 1 each reflective
The focal line position of mirror, caliber can change along tube side, i.e. this reducing thermal-arrest reaction tube 2 enters along tube side
Row becomes caliber and arranges.
When being applied to solar heat chemical system, the linear Fresnel formula solar energy collection that the present invention provides
Thermal reaction apparatus is as reaction unit.In this linear Fresnel formula solar energy heating reaction unit, become face
The area of the linear Fresnel illuminator of long-pending linear Fresnel illuminator group 1 gradually decreases along tube side, and
The caliber of this reducing thermal-arrest reaction tube 2 is gradually reduced along tube side.The reason being arranged so as to is: reaction
After thing enters reaction unit, react along with flowing is constantly carried out；Initial period, reaction carries out rapidly,
Bigger reaction heat (being provided by focused solar energy) is provided, now increases mirror area and i.e. increase focusing too
Sun energy heating power, increases caliber simultaneously, reduces flow velocity, extend the response time, is remarkably improved anti-
Answer speed；Subsequently, reactant partial pressure power increases with product with reactant consumption and constantly drops along tube side
Low, significantly reduce, required reaction heat owing to chemical reaction rate reduces with reactant partial pressure power
(being provided by focused solar energy) reduces the most accordingly；Unnecessary heat can only increase the sensible heat of local gas,
Cause heating up, unfavorable to catalyst, so that reduce mirror area, reduce caliber simultaneously, increase stream
Speed, shortens the response time.Thus this kind of flexible arrangement has adapted to local response speed and has gradually subtracted along tube side
Little feature.
When being applied to solar energy live (open) steam heat generating system, the linear Fresnel formula that the present invention provides
Solar energy heating reaction unit is as heat collector.This linear Fresnel formula solar energy heating reaction unit
In, the area of the linear Fresnel illuminator of variable area linear Fresnel illuminator group 1 first increases along tube side
Reduce after big, and the caliber of this reducing thermal-arrest reaction tube 2 is along tube side first increases and then decreases.It is arranged so as to
Reason be: when feedwater enters after heat collector, be first preheated to saturation (preheating section),
Vaporescence occurs subsequently, and this stage mass dryness fraction gradually rises (evaporator section), when feedwater is completely vaporised
After, saturated vapor is still heated to superheated steam (superheat section)；During Gai due to evaporator section it be
Phase-change heat-exchange, its coefficient of heat transfer two quantity higher than the single-phase coefficient of heat transfer of preheating section and superheat section
Level；For evaporator section, mirror area can be increased thus increase this section of heating power and (carried by focused solar energy
For) to accelerate vaporescence, shorten evaporator section length, increase caliber simultaneously, reduce flow velocity, extend
Heat-exchange time；For preheating section and superheat section, suitably can reduce mirror area thus reduce heating power,
Reduce caliber simultaneously, increase flow velocity (the single-phase coefficient of heat transfer can be increased to a certain extent), shorten heat exchange
Time, it is to avoid it is overheated that tube wall heats up, and deforms.Thus this kind of flexible arrangement has adapted to Local Heat Transfer
Coefficient at preheating section, evaporator section and superheat section along the feature of tube side first increases and then decreases.
Fig. 2 is that a kind of linear Fresnel formula solar energy alcohol reforming heat chemistry according to present invention design is anti-
Answer the specific embodiment of system, including linear Fresnel formula reaction unit 1, regenerator 2, condenser 3,
Cooling tower 4, gas-liquid separator 5, circulating pump 6 and vaporizer 7.
With reference to Fig. 2, alcohols liquid material is after vaporizer 7 and regenerator 2 are heated as unstripped gas
Enter linear Fresnel formula reaction unit 1, under conditions of focused solar energy heating and catalyst participate in
There is reforming reaction, produce synthesis gas.Synthesis gas leaves together with unreacted completely retained material gas
Linear Fresnel formula reaction unit 1 enters condenser 3.Unstripped gas is condensed into liquid material, through gas
Liquid/gas separator 5 mixes with liquid material after separating, and reenters circulation through circulating pump 6 and participates in reaction.
Cooling water in condenser 3 is provided by cooling tower 4.Make through the isolated synthesis gas of gas-liquid separator 5
Export for product, store further or directly use.
Fig. 3 is
The specific embodiment of system, including linear Fresnel formula heat collector 1, steam turbine 2, electromotor 3, cold
Condenser 4, cooling tower 5, oxygen-eliminating device 6, preheater 7 and pressurized circulation pump 8.
With reference to Fig. 3, feedwater is focused solar energy heating through linear Fresnel formula heat collector 1 to be become
Superheated steam under certain temperature and pressure, enters steam turbine 2 expansion working afterwards, and passes through steam turbine
2 drive electromotor 3 to generate electricity.The condensed device of exhaust steam 4 discharged by steam turbine 2 is cooled to supercool
Water, cooling water is provided by cooling tower 5, and the high-temperature steam simultaneously utilizing steam turbine 2 to extract passes through deoxygenation
Device 6 and preheater 7 carry out deoxygenation, preheating to subcooled water, follow after the pressurization of the most pressurized circulating pump 8
Ring enters linear Fresnel formula heat collector 1.
Fig. 4 is a kind of linear Fresnel formula solar energy heating reaction unit according to the embodiment of the present invention
Structural representation, including variable area linear Fresnel illuminator 1, reducing thermal-collecting tube 2, compound parabolic
Face illuminator 3 and glass cover 4, wherein reducing thermal-collecting tube 2 is by selecting absorbing coating 5, rustless steel
Pipe 6 and catalyst 7 are constituted.
With reference to Fig. 4, reducing thermal-collecting tube 2 is positioned at the focal line position of composite parabolic illuminator 3, the sun
Irradiation, after variable area linear Fresnel illuminator 1 focuses on, through glass cover 4, is then passed through being combined
After the secondary focusing of parabolic reflector 3, final absorbing coating 5 sorption enhanced that is chosen is heat,
Reaction heat or flow working medium should be provided to directly heat the chemistry side in stainless steel tube 6.Chemistry side
Should carry out under catalyst 7 participates in, catalyst 7 is grain structure, is filled in stainless steel tube 6.
Fig. 5 is the another kind of linear Fresnel formula solar energy heating reaction unit according to the embodiment of the present invention
Structural representation, including variable area linear Fresnel illuminator 1 and reducing thermal-collecting tube 2, Qi Zhongbian
Footpath thermal-collecting tube 2 is by glass bushing 3, vacuum layer 4, selection absorbing coating 5, stainless steel tube 6 and urges
Agent 7 forms.
With reference to Fig. 5, reducing thermal-collecting tube 2 is positioned at the focal line position of variable area linear Fresnel illuminator 1,
Solar irradiation, after variable area linear Fresnel illuminator 1 focuses on, sequentially passes through glass bushing 3 and true
Dead level 4, final absorbing coating 5 sorption enhanced that is chosen is heat, to the change in stainless steel tube 6
Side should provide reaction heat or flow working medium to directly heat.Chemistry side should be under catalyst 7 participates in
Carrying out, catalyst 7 is grain structure, is filled in stainless steel tube 6.
Particular embodiments described above, is carried out the purpose of the present invention, technical scheme and beneficial effect
Further describe, be it should be understood that the foregoing is only the present invention specific embodiment and
, be not limited to the present invention, all within the spirit and principles in the present invention, that is done any repaiies
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. a linear Fresnel formula solar energy heating reaction unit, it is characterised in that include change face
Long-pending linear Fresnel illuminator group (1) and reducing thermal-arrest reaction tube (2), wherein:
This reducing thermal-arrest reaction tube (2) is fixed in this variable area linear Fresnel illuminator group (1)
The focal line position of each illuminator, this reducing thermal-arrest reaction tube (2) carries out becoming caliber along tube side and arranges,
The mirror area of this variable area linear Fresnel illuminator group (1) is along tube side nonuniform mutation operator.
Linear Fresnel formula solar energy heating reaction unit the most according to claim 1, it is special
Levy and be, described variable area linear Fresnel illuminator group (1) and described reducing thermal-arrest reaction tube (2)
Be mutually matched along tube side Changing Pattern, common realization when receives irradiation along tube side regulation optically focused.
Linear Fresnel formula solar energy heating reaction unit the most according to claim 1, it is special
Levying and be, the mirror area of described variable area linear Fresnel illuminator group (1), is by changing one
In group, illuminator number realizes mirror area along tube side nonuniform mutation operator.
Linear Fresnel formula solar energy heating reaction unit the most according to claim 1, it is special
Levying and be, when being applied to solar heat chemical system, this linear Fresnel formula solar energy heating is reacted
Device is as reaction unit.
Linear Fresnel formula solar energy heating reaction unit the most according to claim 4, it is special
Levying and be, in this linear Fresnel formula solar energy heating reaction unit, variable area linear Fresnel is reflective
The area of the linear Fresnel illuminator of mirror group (1) gradually decreases along tube side, and this reducing thermal-arrest is anti-
The caliber that should manage (2) is gradually reduced along tube side, is gradually reduced along tube side adapting to local response speed
Feature.
Linear Fresnel formula solar energy heating reaction unit the most according to claim 1, it is special
Levy and be, when being applied to solar energy live (open) steam heat generating system, this linear Fresnel formula solar energy
Collection thermal reaction apparatus is as heat collector.
Linear Fresnel formula solar energy heating reaction unit the most according to claim 6, it is special
Levying and be, in this linear Fresnel formula solar energy heating reaction unit, variable area linear Fresnel is reflective
The area of the linear Fresnel illuminator of mirror group (1) first increases along tube side and reduces afterwards, and this reducing collection
The caliber of thermal response pipe (2) is along tube side first increases and then decreases, to adapt to Local Condensing Heat Transfer Coefficients in preheating
Section, evaporator section and superheat section are along the feature of tube side first increases and then decreases.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510034202.2A CN104613656B (en) | 2015-01-23 | 2015-01-23 | Linear Fresnel formula solar energy heating reaction unit |
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| CN201510034202.2A CN104613656B (en) | 2015-01-23 | 2015-01-23 | Linear Fresnel formula solar energy heating reaction unit |
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| CN110375441A (en) * | 2018-04-13 | 2019-10-25 | 兰州大成聚光能源科技有限公司 | Solar energy light gathering and heat collecting system |
| CN114508864A (en) * | 2022-03-10 | 2022-05-17 | 华北电力大学 | Eccentric pipe type light-gathering solar heat collection system |
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| US20090056703A1 (en) * | 2007-08-27 | 2009-03-05 | Ausra, Inc. | Linear fresnel solar arrays and components therefor |
| DE102011004265A1 (en) * | 2011-02-17 | 2012-08-23 | Siemens Aktiengesellschaft | Solar collector strand for a solar thermal continuous steam generator |
| CN103388913B (en) * | 2012-05-07 | 2016-06-08 | 张国印 | A kind of floating tracking solar line focusing reflective mirror |
| CN204555374U (en) * | 2015-01-23 | 2015-08-12 | 中国科学院工程热物理研究所 | Linear Fresnel formula solar energy heating reaction unit |
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