CN104406309A - High-efficiency solar integrated line focusing medium-temperature heat collector - Google Patents
High-efficiency solar integrated line focusing medium-temperature heat collector Download PDFInfo
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- CN104406309A CN104406309A CN201410576256.7A CN201410576256A CN104406309A CN 104406309 A CN104406309 A CN 104406309A CN 201410576256 A CN201410576256 A CN 201410576256A CN 104406309 A CN104406309 A CN 104406309A
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- cavity absorber
- joint component
- heat
- heat collector
- absorber
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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 relates to a high-efficiency solar integrated line focusing medium-temperature heat collector, comprising a metal cavity absorber, a glass sleeve, an aerogel composite thermal insulation layer and a joint component, wherein the side surface of the metal cavity absorber is enclosed into the glass sleeve after being coated by the aerogel composite thermal insulation layer; the contact surfaces of the metal cavity absorber, the glass sleeve and the aerogel composite thermal insulation layer are fixed by virtue of a high-temperature inorganic adhesive; the joint component is used for clamping two ends of the glass sleeve and the metal cavity absorber, and is divided into two modules; an exhaust hole is formed in one module and is used for installing an exhaust pipe; a high-temperature resistant gasket is cushioned between the glass sleeve and the joint component; four threaded holes are formed in the joint component; after the heat collector is installed, the center of an opening of the metal cavity absorber is positioned on a focal plane of a parabolic concentrator. The high-efficiency solar integrated line focusing medium-temperature heat collector disclosed by the invention is low in demand on fabrication process, low in initial investment cost, low in post-maintenance cost, and convenient to manufacture and install, and can be widely applied.
Description
Technical field
The present invention relates to a kind of solar thermal collector, particularly a kind of high-efficiency solar Integral wire focuses on medium-temperature collectors, belongs to solar energy heat utilization technical field.
Background technology
In short more than 200 years since the first time industrial revolution, human society consumes the fossil fuels such as the earth 1 years ability accumulative coal, oil, natural gases sharp, the use of these fossil fuels causes the elements such as a large amount of carbon, sulphur, nitrogen to be discharged in earth surface and atmosphere, has broken the balance in whole biosphere.Fossil fuel traditional at present faces exhaustion, and environmental problem still constantly worsens, and the mankind that so go down will progressively get into a difficult position, and therefore countries in the world are all in the regenerative resource that Devoting Major Efforts To Developing is clean.In various regenerative resource, solar energy almost can be described as the source of all energy on the earth, and coal, oil, natural gas and even biomass energy, geothermal energy, water energy, wind energy, ocean energy etc. are all directly or indirectly be transformed to tellurian energy by solar radiation.The angle of Conversion of Energy, directly utilize solar energy to be high efficiency, therefore Solar use is the emphasis direction of various countries' renewable energy utilization.
Current Solar use mainly contains photovoltaic generation and this two general orientation of solar thermal utilization, and both applications are had nothing in common with each other, but are higher than photovoltaic generation from conversion efficiency solar thermal utilization.Solar thermal utilization field is divided according to the temperature that working medium can reach low temperature field, middle temperature field and high-temperature field, and this depends on heat collector type used.In general heat collector is divided into light-focusing type and non-concentrating type, non-concentrating type heat collector advantage of lower cost, but the thermal source quality that can provide is also low, usually can not meet industrial requirements and can only meet average family life heat demand; Focus solar collector is operated in middle high-temperature field, so can provide the thermal source of higher quality, is a direction more rising in solar thermal utilization.Focus solar collector be by concave mirror or lens by sunlight on less area, make the heat flow in unit are increase and reduce the heat-transfer surface between absorber and environment, thus improve the temperature of working medium.Different focus solar collectors according to hot spot imaged shape are divided into again line focus and point focusing, and point focusing is mainly realized by dish-style, tower system, is operated in high-temperature field; Line focus is mainly realized by trough system, is operated in middle temperature field.In various focus solar collector, slot type system cost is low, and range of application contains generating, hot-working, drying, heating, refrigeration etc., and technology is comparatively ripe.The heat collector of current trough system mainly adopts the structure of parabola eyeglass optically focused and straight-through vacuum tube absorption, the advantage that heat loss is little although vacuum tube has, efficiency is high, but technological requirement and processing cost higher, and leaking easily appears in glass and metal sealing place, the thermal coefficient of expansion of glass and metal difference also can cause glass breakage, reliability is low.Occur in recent years adopting cavity absorber to replace the application example of vacuum tube, the incident ray of the overwhelming majority is absorbed by rational cavity design, and effectively overcome the shortcoming of straight-through vacuum tube, but all the time be not as high as vacuum tube in efficiency, its reason one is that the aperture area of common housing is little, cause that the energy-flux density on heating surface is excessive, temperature is too high, have impact on the lifting of collecting efficiency; Two is that cavity hatch is naked is exposed on the external in environment, and there is the convection heat losses of air, the impact of collecting efficiency wind-engaging is larger; Three be in common housing in Working fluid flow process and wall contact position, chamber temperature high and center temperature is low, ectonexine is heated and unevenly reduces heat exchange efficiency.In addition; the outside general version adopting metal shell protection, central filler insulation material of current cavity absorber; very infirm from practical application effect; ubiquity metal shell and is caused because welding procedure is bad being in use out of shape the problem come off, and inner insulation material of filling easily makes moist overcast and rainy thus reduce effect of heat insulation.For the problems referred to above that existing groove type heat collector exists, the present invention designs a kind of high-efficiency solar Integral wire and focuses on medium-temperature collectors, the advantage of vacuum tube and cavity heat collector is combined, not only solve the inefficient problem of cavity absorber heat exchanging, also solve the problem of opening part heat convection loss, and sound construction, cost is lower, achieves efficient solar energy heating and utilizes.
Summary of the invention
The object of the invention is the deficiency overcoming existing groove type line-focusing heat collector, a kind of high-efficiency solar Integral wire is provided to focus on medium-temperature collectors, the advantage of vacuum tube and cavity heat collector is combined, not only solve the inefficient problem of cavity absorber heat exchanging, also solve the problem of opening part heat convection loss, and sound construction, cost is lower, effectively improves the collecting efficiency of trench light condensing system to solar energy.
The present invention completes by the following technical programs: a kind of line focus medium-temperature collectors of high-efficiency solar integration is made up of metallic cavity absorber, glass bushing, aeroge composite heat-insulating layer and joint component.Metallic cavity absorber side aeroge composite heat-insulating layer parcel, then by both embed wholly glass bushings, the contact surface high temperature inorganic adhesive of three is fixed; Joint component is used for the two ends of clamping glass sleeve pipe and metallic cavity absorber, and often end is divided into two modules, and one of them module leaves steam vent for installing blast pipe; In addition, being lined with high temperature resistant pad between glass bushing and joint component prevents hot-air from overflowing; Joint component leaves four screwed holes and be used for fixing grip cavity absorber and glass bushing, be convenient to heat collector integral installation on the bracing frame of trough system simultaneously; After heat collector installs, the open centre of metallic cavity absorber is just in time positioned on the focal plane of parabolic concentrator.
Operation principle: sunshine converges on the opening of metallic cavity absorber through glass bushing after parabolic concentrator reflection, because opening is designed to M font, light can be all through for several times reflection and almost heat energy by cavity outer metallic surface sorption enhanced in cavity outer metallic surface; After working medium flows and absorbs heat energy in cavity, temperature raises, and period forms turbulent flow due to the interference being subject to chamber inner fin, the surperficial convection transfer rate between working medium and cavity inner surface is increased, thus improves heat exchange efficiency; Cavity side aeroge composite heat-insulating layer parcel, effectively prevent thermal radiation loss outwardly, aeroge composite heat-insulating layer has certain intensity simultaneously, can ensure uniform stressed between metallic cavity absorber and glass bushing, improve its steadiness; The air of cavity hatch near surface also absorbs partial heat, but externally cannot be dispelled the heat by heat convection owing to being sealed in glass bushing, can only lose the heat of small part with heat transfer and thermal-radiating form; At the initial stage of heat collector work, first the hot-air of expanded by heating is discharged a part by blast pipe to seal again, air afterwards in glass bushing is just in relatively thin state, forms the environment being similar to vacuum tube, and this is also conducive to reducing heat loss and promoting collecting efficiency.
Compared with prior art, tool has the following advantages in the present invention.
1, the opening of metallic cavity absorber is designed to M font, compares the square of common housing and triangular opening area larger, be heated evenly, heat transfer efficiency is higher.
2, the inner surface of metallic cavity absorber is with some fins, when working medium is flowed in chamber, Reynolds number increases thus forms turbulent flow, and surperficial convection transfer rate increases, the significant increase heat exchange efficiency of working medium and cavity inner surface.
3, glass bushing effectively prevent cavity hatch near surface air and extraneous convection heat losses.
4, the heat collector work initial stage is by the air of blast pipe discharge section expanded by heating, forms the environment being similar to vacuum tube, further reduces heat loss.
5, metallic cavity absorber, fix with high temperature inorganic adhesive between aeroge composite heat-insulating layer and glass bushing, heat collector two ends place metallic cavity absorber and glass bushing grip with joint component simultaneously, the aeroge composite heat-insulating layer with some strength ensure that the overall uniform force of heat collector, sound construction, has stronger wind loading rating.
6, manufacture craft of the present invention requires low, and up-front investment cost is low, and later maintenance is less, and making and installation is convenient, can widely use.
accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention;
Fig. 2 is heat collector cross sectional representation of the present invention;
Fig. 3 is joint component schematic diagram of the present invention.
detailed description of the invention:
This high-efficiency solar Integral wire focuses on medium-temperature collectors and is made up of glass bushing 1, metallic cavity absorber 2, aeroge composite heat-insulating layer 3, joint component 4, high temperature resistant packing ring 5, blast pipe 6.Metallic cavity absorber 2 side aeroge composite heat-insulating layer 3 wraps up, then by both embed wholly glass bushings 1, the contact surface high temperature inorganic adhesive of three is fixed; Joint component 4 is for the two ends of clamping glass sleeve pipe 1 and metallic cavity absorber 2, and often end is divided into two modules 4 ' and 4 ", wherein module 4 " leave steam vent 6 ' for installing blast pipe 6; In addition, being lined with high temperature resistant pad 5 between glass bushing 1 and joint component 4 prevents hot-air from overflowing; Joint component 4 leaves four screwed holes and be used for fixing grip cavity absorber 2 and glass bushing 1, be convenient to heat collector integral installation on the bracing frame of trough system simultaneously; After heat collector installs, the open centre of metallic cavity absorber 2 is just in time positioned on the focal plane of parabolic concentrator.
Embodiment 1
High-efficiency solar Integral wire focuses on medium-temperature collectors direct steam generation: the sunshine of parabolic concentrator reflection projects the open centre place of metallic cavity absorber 2 through glass bushing 1, absorbed by the opening outer surface of metallic cavity absorber 2 after multiple reflections and be converted into heat energy, air heats expansion air pressure in glass bushing 1 increases, open blast pipe 6 discharge section hot-air until glass bushing 1 inside and outside air pressure balance, close blast pipe 6, water enters from one end of metallic cavity absorber 2, in flow process, absorb heat that metallic cavity absorber device 2 collects and be vaporizated into the water vapour of 120 DEG C, water vapour is discharged from the other end of metallic cavity absorber 2, the occasion passing to needs is used.
Embodiment 2
High-efficiency solar Integral wire focuses on medium-temperature collectors and produces high temperature heat conductive oil: the sunshine of parabolic concentrator reflection projects the open centre place of metallic cavity absorber 2 through glass bushing 1, absorbed by the opening outer surface of metallic cavity absorber 2 after multiple reflections and be converted into heat energy, air heats expansion air pressure in glass bushing 1 increases, open blast pipe 6 discharge section hot-air until glass bushing 1 inside and outside air pressure balance, close blast pipe 6, conduction oil enters from one end of metallic cavity absorber 2, absorb the heat that metallic cavity absorber device 2 collects in flow process after, temperature rises to more than 200 DEG C, conduction oil is discharged from the other end of metallic cavity absorber 2, the occasion passing to needs is used.
Claims (3)
1. a high-efficiency solar Integral wire focuses on medium-temperature collectors, it is characterized in that it is made up of metallic cavity absorber, glass bushing, aeroge composite heat-insulating layer and joint component, metallic cavity absorber side aeroge composite heat-insulating layer wraps up, again by both embed wholly glass bushings, the contact surface high temperature inorganic adhesive of three is fixed; Joint component is used for the two ends of clamping glass sleeve pipe and metallic cavity absorber, and often end is divided into two modules, and one of them module leaves steam vent for installing blast pipe; Being lined with high temperature resistant pad in addition between glass bushing and joint component prevents hot-air from overflowing; Joint component leaves four screwed holes and be used for fixing grip cavity absorber and glass bushing.
2. the opening focusing on the metallic cavity absorber of medium-temperature collectors according to the high-efficiency solar Integral wire described in claims 1 is designed to M font, and inner surface is with some fins, improves collecting efficiency and heat exchange efficiency.
3. according to described in claims 1 high-efficiency solar Integral wire focus on medium-temperature collectors the work initial stage by the air of blast pipe discharge section expanded by heating after seal again, form thin interior air ambient, further reduce the heat loss in the course of work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576256.7A CN104406309A (en) | 2014-10-26 | 2014-10-26 | High-efficiency solar integrated line focusing medium-temperature heat collector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576256.7A CN104406309A (en) | 2014-10-26 | 2014-10-26 | High-efficiency solar integrated line focusing medium-temperature heat collector |
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| CN104406309A true CN104406309A (en) | 2015-03-11 |
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| CN201410576256.7A Pending CN104406309A (en) | 2014-10-26 | 2014-10-26 | High-efficiency solar integrated line focusing medium-temperature heat collector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724267A (en) * | 2018-12-13 | 2019-05-07 | 沈阳佳晔能源科技股份有限公司 | A kind of groove type solar opto-thermal system by air heat-carrying |
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2014
- 2014-10-26 CN CN201410576256.7A patent/CN104406309A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109724267A (en) * | 2018-12-13 | 2019-05-07 | 沈阳佳晔能源科技股份有限公司 | A kind of groove type solar opto-thermal system by air heat-carrying |
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Application publication date: 20150311 |