CN103335418B - Trough type solar thermal collector with variable lens area - Google Patents
Trough type solar thermal collector with variable lens area Download PDFInfo
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- CN103335418B CN103335418B CN201310314630.1A CN201310314630A CN103335418B CN 103335418 B CN103335418 B CN 103335418B CN 201310314630 A CN201310314630 A CN 201310314630A CN 103335418 B CN103335418 B CN 103335418B
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- condenser
- trough type
- type solar
- collecting lens
- main condenser
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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
Abstract
The invention discloses a trough type solar thermal collector with a variable lens area, which is used for a trough type solar thermal power generation system. The trough type solar thermal collector comprises a control cabinet, a drive motor, a bridge tower, a hydraulic drive linkage mechanism, an extension collecting lens, a main collecting lens and an absorption tube, wherein the main collecting lens is controlled through the control cabinet and can be used for tracking solar radiation in real time; and the extension collecting lens is in synchronous linkage along with the tracking motion of the solar radiation of the main collecting lens, and the dynamic extension of the area of a collecting lens is realized during the process. By utilizing the trough type solar thermal collector disclosed by the invention, a synchronous linkage change rule between the extension collecting lens and the main collecting lens is matched with a solar radiation change rule and a flow form resistance change rule, the increasing of a flow form resistance can be effectively controlled while the utilization rate of the whole solar radiation is obviously increased, and the durability of a device is increased; and meanwhile, according to the trough type solar thermal collector disclosed by the invention, the distribution nonuniformity of circumferential thermal flux density of the absorption tube can be reduced, the deformation problem, which is caused by circumferential thermal stress difference, of the absorption tube can be relieved, and the reliability of the device can be increased.
Description
Technical field
The invention belongs to solar energy-heat utilization technology field, be specifically related to a kind of variable mirror area trough type solar heat-collector.
Background technology
At present, trough type solar power generation is that in solar energy thermal-power-generating technology, development is the most ripe, the technology type that commercialization degree is the highest, it refers to and utilizes parabolic trough type solar concentrating collector that solar radiant energy is collected, heating water or by other heat-transfer working mediums heating water generates steam, and then drive the heat utilization technology of dynamic power system unit generation.
Trough type solar power generation system is made up of thermal-arrest subsystem, accumulation of energy subsystem, power sub-system and relevant auxiliary RACS etc. conventionally.Wherein, thermal-arrest subsystem is the key components in trough type solar power generation system, is also the notable feature that is different from traditional generation technology, and being controlled at of the lifting of its collecting efficiency and cost determined that can this technology large-scale application to a great extent.But, due to the low feature of earth surface solar radiation energy-flux density, thermal-arrest subsystem is conventionally in large scale, and operation and maintenance is comparatively complicated, thereby the operation and maintenance cost of trough type solar power generation system depends on the raising of thermal-arrest subsystem reliability and durability.Cause the reason that groove type heat collector lost efficacy to come from the one hand environmental condition, the heat collector stress deformation causing as wind-force; Come from the other hand components interior, if absorption tube is because of stress deformation that circumferentially thermal stress distribution inequality causes.
Visible, the subject matter that trough type solar heat-collector faces at present comprises: further improve solar radiation utilization rate, simultaneously effective control system cost; Reduce flow profile resistance, improve the durability of device; Alleviate the circumferential thermal stress distribution inequality of absorption tube, improve device reliability.The present invention proposes solution for the problems referred to above.
Summary of the invention
(1) technical problem that will solve
In view of this, the invention provides a kind of variable mirror area trough type solar heat-collector, to solve the problems referred to above that exist in trough type solar heat-collector.
(2) technical scheme
For achieving the above object, the invention provides a kind of variable mirror area trough type solar heat-collector, for trough type solar power generation system, this variable mirror area trough type solar heat-collector comprises controls rack 1, drive motors 2, bridge tower 3, hydraulic-driven link gear 4, expansion condenser 5, main condenser 6 and absorption tube 7, wherein: main condenser 6 is driven by drive motors 2 and hydraulic-driven link gear 4, control by controlling rack 1, solar radiation is carried out to real-time tracking, following range is that main condenser 6 symmetry axis and horizontal line angle theta are at [0 °, 180 °] interval interior variation, expansion condenser 5 is connected with main condenser 6 by hydraulic-driven link gear 4, and with the solar radiation pursuit movement of main condenser 6, synchronous interaction occurs.
In such scheme, in the time of θ=0 ° or 180 °, described expansion condenser 5 is contracted to described main condenser 6 rear sides completely.
In such scheme, in the time of θ=90 °, described expansion condenser 5 is expanded to described main condenser 6 both sides completely.In the time of θ=90 °, the composite mirror surface of described expansion condenser 5 and described main condenser 6 common compositions, the dead in line of its focal line and described absorption tube 7.
In such scheme, in the time of 180 ° of 90 ° of 0 ° of < θ < and 90 ° of < θ <, described expansion condenser 5 parts are launched, its not deploying portion be still positioned at described main condenser 6 rear sides.In the time of 180 ° of 90 ° of 0 ° of < θ < and 90 ° of < θ <, there is synchronous interaction with described main condenser 6 in described expansion condenser 5, the focal line that described expansion condenser 5 parts are launched minute surface is positioned at described absorption tube 7 inside.
(3) beneficial effect
Can find out from technique scheme, the present invention has following beneficial effect:
1, variable mirror area trough type solar heat-collector provided by the invention is realized the expansion of condenser area when condenser mirror is to solar radiation real-time tracking, thereby improves the solar radiation utilization rate becoming under radiation parameter.
2, variable mirror area trough type solar heat-collector provided by the invention, expansion condenser matches with synchronous interaction rule and the solar radiation variations rule of main condenser motion, condenser area increases with intensity of solar radiation and increases and synchronize, thereby significantly improves solar radiation utilization rate.
3, variable mirror area trough type solar heat-collector provided by the invention, expansion condenser matches with synchronous interaction rule and the flow profile change in resistance rule of main condenser motion, condenser area increases and reduces to synchronize with flow profile resistance, thereby in significantly improving solar radiation utilization rate, effectively control flow profile resistance increment, improve device durability.
4, variable mirror area trough type solar heat-collector provided by the invention, increase overall condenser area by setting up expansion condenser, the corresponding increase of absorption tube optically focused heating surface area, thereby reduce circumferential heat flux distribution inhomogeneities, alleviate the absorption tube problem on deformation that circumferential thermal stress difference is brought, improve device reliability.
5, variable mirror area trough type solar heat-collector provided by the invention, increases overall condenser area by setting up expansion condenser, increases thermal-arrest total amount, thereby shortens pipeline, reduces costs.
6, variable mirror area trough type solar heat-collector provided by the invention, realizes the synchronous interaction of expansion condenser with main condenser motion by mechanical linkage which controls, without control motor is set separately, thus effective control system cost.
7, variable mirror area trough type solar heat-collector provided by the invention, in synchronous interaction at expansion condenser with main condenser motion, dynamically realize the expansion of condenser area, can effectively solve the contradiction increasing when many row's heat collectors are arranged between blocking between condenser area and row, significantly improve land utilization ratio.
Brief description of the drawings
Fig. 1 is according to the operation principle schematic diagram (θ=0 °, similarly) of variable mirror area trough type solar heat-collector that the invention provides embodiment when the θ=180 °.
Fig. 2 is according to the operation principle schematic diagram (90 ° of 0 ° of < θ <, when 180 ° of 90 ° of < θ < similarly) of variable mirror area trough type solar heat-collector that the invention provides embodiment.
Fig. 3 is according to the operation principle schematic diagram (θ=90 °) of variable mirror area trough type solar heat-collector that the invention provides embodiment.
In above-mentioned figure, each parts and respective markers are: 1-controls rack; 2-drive motors; 3-bridge tower; 4-hydraulic-driven link gear; 5-expands condenser; The main condenser of 6-; 7-absorption tube.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in more detail.
With reference to Fig. 1, the invention provides a kind of variable mirror area trough type solar heat-collector, can be used for trough type solar power generation system, comprise and control rack 1, drive motors 2, bridge tower 3, hydraulic-driven link gear 4, expansion condenser 5, main condenser 6 and absorption tube 7.Main condenser 6 is driven by drive motors 2 and hydraulic-driven link gear 4, controls by controlling rack 1, and solar radiation is carried out to real-time tracking, and following range is that main condenser 6 symmetry axis and horizontal line angle theta change in [0 °, 180 °] is interval.Expansion condenser 5 is connected with main condenser 6 by hydraulic-driven link gear 4, and with the solar radiation pursuit movement of main condenser 6, synchronous interaction occurs.
When θ=0 ° (θ=180 ° time similarly), with reference to Fig. 1, expansion condenser 5 is retracted to main condenser 6 rear sides, the dead in line of the focal line of main condenser 6 and absorption tube 7 completely.In the time of 90 ° of 0 ° of < θ < (90 ° < θ < 180 ° time similarly), with reference to Fig. 2, expansion condenser 5 parts are launched, its not deploying portion be still positioned at main condenser 6 rear sides, expansion condenser 5 parts are launched the focal line of minute surfaces and are positioned at absorption tube 7 inside.In the time of θ=90 °, with reference to Fig. 3, expansion condenser 5 is expanded to main condenser 6 both sides completely, the composite mirror surface of expansion condenser 5 and main condenser 6 common compositions, the dead in line of its focal line and absorption tube 7.
With reference to Fig. 1, Fig. 1 is according to the operation principle schematic diagram (θ=0 °, similarly) of variable mirror area trough type solar heat-collector that the invention provides embodiment when the θ=180 °.In the time of θ=0 ° or θ=180 °, intensity of solar radiation is minimum, now increases the effect of overall condenser area by expansion condenser 5 the poorest.Secondly, the profile drag coefficient maximum that now heat collector produces Air Flow, increases overall condenser area by expansion condenser 5 and certainly will significantly increase flow resistance, causes the inner moment of torsion of crane span structure 3 acutely to increase, and threatens heat collector durability.Again, now between heat collector row, block the most seriously, increase overall condenser area by expansion condenser 5 and can further aggravate to block impact.
With reference to Fig. 2, Fig. 2 is according to the operation principle schematic diagram (90 ° of 0 ° of < θ <, when 180 ° of 90 ° of < θ < similarly) of variable mirror area trough type solar heat-collector that the invention provides embodiment.First, in the time of 180 ° of 90 ° or 90 ° < θ < of 0 ° of < θ <, intensity of solar radiation moves closer to 90 ° and strengthen gradually with θ, and the effect that increases overall condenser area by expansion condenser 5 in this process takes a turn for the better gradually.Meanwhile, in θ moves closer to the change procedure of 90 °, the focus lamp area change amount that expansion condenser 5 provides increases thereupon, and this Changing Pattern matches with the Changing Pattern of intensity of solar radiation, has further strengthened the lifting effect of solar radiation utilization rate.Secondly, in the time of 180 ° of 90 ° or 90 ° < θ < of 0 ° of < θ <, the profile drag coefficient that heat collector produces Air Flow moves closer to 90 ° and reduce gradually with θ, in this process, increase overall condenser area by expansion condenser 5, when improving solar radiation utilization rate, can not produce obviously increase by flow resistance.Again, in the time of 180 ° of 90 ° or 90 ° < θ < of 0 ° of < θ <, between heat collector row, circumstance of occlusion moves closer to 90 ° and alleviate gradually with θ, in this process, increase overall condenser area by expansion condenser 5, can effectively improve ground coverage rate, thereby improve solar radiation utilization rate.
With reference to Fig. 3, Fig. 3 is according to the operation principle schematic diagram (θ=90 °) of variable mirror area trough type solar heat-collector that the invention provides embodiment.In the time of θ=90 °, intensity of solar radiation is the highest, now increases the effect of overall condenser area by expansion condenser 5 best, and solar radiation utilization rate promotes the most remarkable.Secondly, the profile drag coefficient minimum that now heat collector produces Air Flow, increases the minimum that affects of overall condenser area flow resistance by expansion condenser 5.Again, now unobstructed between heat collector row, increase overall condenser area by expansion condenser 5 and can at utmost improve ground coverage rate, thereby improve solar radiation utilization rate.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. a variable mirror area trough type solar heat-collector, for trough type solar power generation system, it is characterized in that, this variable mirror area trough type solar heat-collector comprises controls rack (1), drive motors (2), bridge tower (3), hydraulic-driven link gear (4), expansion condenser (5), main condenser (6) and absorption tube (7), wherein:
Main condenser (6) is driven by drive motors (2) and hydraulic-driven link gear (4), control by controlling rack (1), solar radiation is carried out to real-time tracking, following range is that main condenser (6) symmetry axis and horizontal line angle theta change in [0 °, 180 °] is interval;
Expansion condenser (5) is connected with main condenser (6) by hydraulic-driven link gear (4), and with the solar radiation pursuit movement of main condenser (6), synchronous interaction occurs.
2. variable mirror area trough type solar heat-collector according to claim 1, is characterized in that, in the time of θ=0 ° or 180 °, described expansion condenser (5) is contracted to described main condenser (6) rear side completely.
3. variable mirror area trough type solar heat-collector according to claim 1, is characterized in that, in the time of θ=90 °, described expansion condenser (5) is expanded to described main condenser (6) both sides completely.
4. variable mirror area trough type solar heat-collector according to claim 3, it is characterized in that, in the time of θ=90 °, described expansion condenser (5) and the common composite mirror surface forming of described main condenser (6), the dead in line of its focal line and described absorption tube (7).
5. variable mirror area trough type solar heat-collector according to claim 1, it is characterized in that, in the time of 180 ° of 90 ° of 0 ° of < θ < and 90 ° of < θ <, described expansion condenser (5) part is launched, its not deploying portion be still positioned at described main condenser (6) rear side.
6. variable mirror area trough type solar heat-collector according to claim 5, it is characterized in that, in the time of 180 ° of 90 ° of 0 ° of < θ < and 90 ° of < θ <, there is synchronous interaction with described main condenser (6) in described expansion condenser (5), the focal line that described expansion condenser (5) part is launched minute surface is positioned at described absorption tube (7) inside.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310314630.1A CN103335418B (en) | 2013-07-24 | 2013-07-24 | Trough type solar thermal collector with variable lens area |
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| CN201310314630.1A CN103335418B (en) | 2013-07-24 | 2013-07-24 | Trough type solar thermal collector with variable lens area |
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| CN103335418B true CN103335418B (en) | 2014-12-03 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105737414A (en) * | 2014-12-12 | 2016-07-06 | 湘电集团有限公司 | Sun-shading device of light-collecting saucer |
| CN105156285B (en) * | 2015-09-16 | 2018-02-27 | 中国科学院工程热物理研究所 | One kind is without the wide irradiation Photospot solar card Linne electricity generation system of accumulation of energy and method |
| CN106766272B (en) * | 2016-12-15 | 2019-12-20 | 中国科学院工程热物理研究所 | Active defocusing regulation and control method for parabolic trough type solar thermal collector |
| CN106788236B (en) * | 2016-12-27 | 2018-06-19 | 中国科学院工程热物理研究所 | A kind of full spectrum cascade utilization device of line focus condensation photovoltaic-photo-thermal |
| CN113513879B (en) * | 2021-07-21 | 2022-09-30 | 吕梁学院 | High-efficient drying device based on solar energy |
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| AU784427B2 (en) * | 2001-01-03 | 2006-03-30 | Solahart Industries Pty Ltd | Reflector for solar collector tube array |
| CN201811460U (en) * | 2010-05-17 | 2011-04-27 | 山东威特人工环境有限公司 | Trough type solar thermal collector and solar thermal utilization system |
| EP2520871A1 (en) * | 2008-12-31 | 2012-11-07 | Adolfo Luis López Ferrero | Vacuum-tube solar collector with overheating protection by means of a rotating reflector |
| CN103115445A (en) * | 2013-02-05 | 2013-05-22 | 中盈长江国际新能源投资有限公司 | Solar Automatic soaking and gathering-heat pipe, slot-typed assembly, thermal power generating system and craft |
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2013
- 2013-07-24 CN CN201310314630.1A patent/CN103335418B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU784427B2 (en) * | 2001-01-03 | 2006-03-30 | Solahart Industries Pty Ltd | Reflector for solar collector tube array |
| EP2520871A1 (en) * | 2008-12-31 | 2012-11-07 | Adolfo Luis López Ferrero | Vacuum-tube solar collector with overheating protection by means of a rotating reflector |
| CN201811460U (en) * | 2010-05-17 | 2011-04-27 | 山东威特人工环境有限公司 | Trough type solar thermal collector and solar thermal utilization system |
| CN103115445A (en) * | 2013-02-05 | 2013-05-22 | 中盈长江国际新能源投资有限公司 | Solar Automatic soaking and gathering-heat pipe, slot-typed assembly, thermal power generating system and craft |
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