CN103375370A

CN103375370A - Non-tracking ball lens array power generation system

Info

Publication number: CN103375370A
Application number: CN2012101422745A
Authority: CN
Inventors: 汪烈生
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-04-28
Filing date: 2012-04-28
Publication date: 2013-10-30

Abstract

The invention relates to a solar non-tracking ball lens array power generation system. A core component of the system includes ball lenses with evacuated collectors, the system mainly comprises the ball lenses, curved collectors, a pipeline, an outer cover and foam glass U-shaped structure heat-insulated pipes, the diameter of each ball lens is about 6-10cm, the parts are integrally assembled on support columns by a fusion welding process, a plurality of ball lens arrays in a small row are serially and parallelly connected to form an ultra-large array for focusing and collecting sunlight, heat conducting oil or molten salt media are filled in the pipeline, heat in the media is conducted to a water storage heat exchange tank under the action of a pump, and high-temperature and high-pressure water vapor is generated by heat exchange to drive a turbine to generate power. When the system is applied to small areas such as a roof, a miniature turbine matched with the system needs to be arranged to generate power, generated electric energy can be directly inputted to a power grid, and attached distilled drinking water and domestic hot water are provided.

Description

Free tracking ball lens array power generation system

Technical field

The present invention relates to a kind of solar energy free tracking ball lens array power generation system.

Background technique

Solar energy thermal-power-generating is the solar energy generation technology of another potentiality that grow a lot beyond the photovoltaic power generation technology.It is to produce the high heat of high temperature by reflector or lens focus sunlight, and heating work medium such as conduction oil or fused salt conduct heat exchange tank to retaining with heat, and the water vapor that produces High Temperature High Pressure by heat exchange drives turbine generation.Sunlight focusing can only utilize direct solar radiation, needs to follow the tracks of the sun, and point focusing can obtain high temperature, but will carry out two-dimensional tracking; Temperature during linear focusing can obtain only need to be carried out one dimension and be followed the tracks of.Only have at present the slot type system to realize commercialization, tower system, dish formula system still are in demonstration phase.No matter be traditional paraboloid trough type system or the novel Fresnel system that the secondary reflecting mirror is arranged, all belong to linear focusing system.The unique distinction of Fresnel system is that its plane mirror can in a row control, and can sun-tracing.Solar beam will have on the central heat absorption tube of efficiently selecting the light coating above will being gathered and being positioned at reflective areas.The normally cheap standarized component of parts that this system is required can obtain in worldwide, guarantees the high local share of added value, thereby makes this technology compare the advantage of having more with other competition technology.In addition, the Fresnel technology is to wind load and insensitive.The pipeline that the slot type system focuses on is to follow the tracks of the sun together and move along with reflector, namely can't realize the tracking under the fixed target, causes the heaviness of machinery, and wind loading rating is relatively poor, and the larger shortcoming of heat loss.The dish formula of representative case one U.S. SES company of point focusing dish formula system-Stirling thermal engine operating solar power system, photo-thermal conversion efficiency ranks first at three type systematic metas up to about 85%, uses flexibly, both can be used as distributed system and powered separately, generating also can be connected to the grid.Shortcoming is: involve great expense and need two-dimensional sun-tracing.

As everyone knows, solar energy heat build-up generating and condensation photovoltaic, its tracking system has occupied cost greatly.Permanent operation must break down and damage! Also can obtain point focusing sunlight if can not follow the tracks of the sun, the space that system cost descends and the rate of fault of operation also can descend greatly.According to the characteristic of Ball Lenses optically focused, once had two people for a kind of novel method application that does not need sun tracking light focusing patent, wherein one in 07 month 12 days nineteen eighty-three application, document number or name are called US4392482A; Another one is that I apply for that on 05 20th, 2008 denomination of invention is: ball lens array heat collection system without tracking.The conception of exempting from tracing collection is fine, but will make product, and the design proposal before nearly 30 years and the proprietary material that I submitted in 2008 all can't be realized! Definite say that the most basic several large technical problem does not all relate to or thought deeply, as: does 1, the heat collector of Ball Lenses below adopt hollow or vacuum? if how to realize on the technique of employing vacuum! 2, the direct water of the heat-conducting medium in the pipeline, even the hot spot that Ball Lenses focuses on can make the water generates high-temperature steam, pipeline could bear the high pressure of steam! 3, the heat-insulated pipe that connects each heat collector adopts any material and how with its high efficiency welding assembly.Definite saying do not have ready-made Method and process to realize! Fine conception also only is to talk about stratagems on paper again if these technical barriers can't solve even not think deeply!

The discussion of engineer by doing easy experiment and Sunpower Corp. exchanges, and wherein technique and technical barrier display gradually! For problem, can be resolved by permanent thinking problem wherein, can realize at least in theory with on the technique.Therefore, be necessary follow-on free tracking ball lens array power generation system is done comprehensively careful elaboration and applied for a patent.

The actual serviceability temperature of organic conduction oil is 320 ℃, just begins charing more than 370 ℃ when temperature reaches, and seriously blocks sometimes circulatory system pipeline.Adopt high-temperature molten salt to have the following advantages as heat carrying agent: (1) Molten Salt Heat Transfer coefficient is high, and thermostability is high and the quality transport velocity is fast, and (2) can obtain the high-temperature heat carrier that different temperatures requires by the mixing of different melting points and boiling point inorganic salts.The good stability of chlorate, boiling point height, the high-temperature heat carrier of very suitable following solar energy thermal-power-generating.

Add the refractive index that lead oxide can improve Ball Lenses in the Ball Lenses, namely the focal length of hot spot gets over sphere, obtains higher optically focused ratio.Method by sandblast or hydrofluoric acid corrosion, make coarse trace can for the required local surfaces of Ball Lenses, can find docking point accurately to Ball Lenses and the welding of " stent strut " and " vacuum heat collector " by " trace ", thereby realize the precisely welding assembly of position.Select its consumptive material of the less Ball Lenses of diameter and volume less, but too little that corresponding vacuum heat collector is set is just more difficult, and optically focused is more inadequate than also.If too large its consumptive material and volume will increase progressively along with the quadratic power that diameter increases multiple, it is more suitable to consider that composite factor adopts the Ball Lenses of 6-10cm to form an array optically focused, can obtain required light concentrating times like this, can reach a balance at consumptive material and cost again!

The Ball Lenses of several diameters 6-10cm need lean on support could form for a moment, adopt triangle or trapezoidal hollow steelframe as the supporting base of support, length according to the Ball Lenses diameter, the interval is slightly larger than the distance of a Ball Lenses on support, weld a pillar and be used for supporting fixedly Ball Lenses, pillar upper end be hollow structure, in the cavity for insert the glass column core for the welding of Ball Lenses.

Each Ball Lenses need dispose a vacuum heat collector, and the hot spot coverage rate that vacuum heat collector focuses on according to Ball Lenses in a year and the radian of sphere design.The vacuum heat collector structure characteristic is: it is made of curved surface heat collecting sheet, pipeline, outer cover, several large component of the U-shaped structure heat-insulated pipe of multi cellular glass, adopts glass material to make with blowing method or casting process technique.Being coated with resistant to elevated temperatures light-absorbing coating on the curved surface heat collecting sheet (or directly adds the light-absorbing coating material in the vitreous humor of heat collecting sheet, perhaps can greatly improve its working life), and the groove that coincide for pipeline is reserved at the back side, the outer cover bottom is reserved a valve that the confession vacuumizes and has been passed two circular holes of fixation for pipeline, need be coated with reflecting coating on the enclosure wall.

The premium properties such as the multi cellular glass quality is light, thermal conductivity is little, mechanical strength is high, permanent, the heat-insulated pipe that is used for the connection vacuum heat collector should adopt foam glass technology and material.Can not but traditional production technology probably directly be produced the multi cellular glass heat-insulated pipe of U-shaped structure? creationary solution is: can't realize on the multi cellular glass heat-insulated pipe technique of the U-shaped structure of one, but the multi cellular glass heat-insulated pipe of the U-shaped structure of halfbody still can produce! At first be to produce U-shaped glass tube, put the U-shaped pipe of multi cellular glass of two halfbodies at U-shaped glass tube, by fusion joining process assembling all-in-one-piece " the U-shaped structure heat-insulated pipe of multi cellular glass ".In order to improve the heat-insulating property of " the U-shaped structure heat-insulated pipe of multi cellular glass ", only need at outer wall plating one deck reflecting coating and wrap up in again one deck polyurethane material, the foamed polyurethane of U-shaped shape is cut open to be enclosed within on the U-shaped structure heat-insulated pipe of multi cellular glass to fix with band or glue get final product.

At this packaging technology is done the emphasis explanation, as: Ball Lenses and support be how to assemble, vacuum heat collector be how to assemble, vacuum heat collector and Ball Lenses be packaging technology that how to assemble, the U-shaped structure heat-insulated pipe of multi cellular glass and vacuum heat collector? at first be to adopt the triangle of moderate length or trapezoidal hollow steelframe as the supporting base of support, every interval is slightly larger than pillar of distance need welding of a Ball Lenses on the pedestal, pillar upper end be hollow structure, in the cavity for insert the glass column core for the welding of Ball Lenses; Vacuum heat collector is made of curved surface heat collector, pipeline, outer cover, the U-shaped structure heat-insulated pipe four large component of multi cellular glass, first with the groove Dock With Precision Position at pipeline and the curved surface heat collector back side and be fused into one, fixed hole and outer cover bottom weld that two ports of pipeline pass the bottom of outer cover are integral, and spill about 1cm long; Then with " sandblast trace " Dock With Precision Position on " window " of outer cover and the Ball Lenses and be fused into the cavity of a sealing, be evacuated by the air exhaust nozzle of reserving on the outer cover; To be provided with afterwards the Ball Lenses of vacuum heat collector and the glass column core welding in the stent strut cavity, get final product stationary positioned; After Ball Lenses is fixed on the support, be concatenated into one by the two tubes of two adjacent vacuum heat collector bottom 1cm length and the welding of the U-shaped structure heat-insulated pipe of multi cellular glass, wherein: the outer bore of the pipe that 1cm is long is a bit larger tham about the interior bore 0.05cm of the U-shaped heat-insulated pipe of multi cellular glass, and the arrangement of the every pipe of pipe that 1cm is long is parallel, can not form angle, the energy that utilizes flame gun to focus on, simultaneously the long two tubes of the 1cm of vacuum heat collector bottom and the interior bore of the U-shaped heat-insulated pipe of multi cellular glass are heated, make it near the melting attitude, to inner slippage Dock With Precision Position, cooling curing can realize efficiently contacting fast assembling by the mouth end.

Can exempt from the tracing collection system seize competitive advantage in market, and key is whether its manufacture cost and production technology be advanced.By developing advanced automatic assembling technique and large-scale production, its cost perhaps has very large decline space, at least in small area applications such as the roof, be furnished with tracking means heat generating system can't with its competition! This is at least it and has stayed the space of a bit growing up.

Summary of the invention

The invention reside in provides a kind of solar energy free tracking ball lens array power generation system.

Embodiment:

Embodiment 1, a kind of solar energy free tracking ball lens array power generation system, its core component is band vacuum heat collector Ball Lenses, mainly consisted of by diameter 6-10cm Ball Lenses, curved surface heat collecting sheet, pipeline, outer cover, several large component of the U-shaped structure heat-insulated pipe of multi cellular glass, the Ball Lenses surface is coated with anti-reflection coating, makes the coarse trace of " window " docking of confession " support " and outer cover to the required local surfaces of Ball Lenses by blasting craft; Be coated with resistant to elevated temperatures light-absorbing coating and the back side on the curved surface heat collecting sheet and reserve the groove that coincide for pipeline, pipeline and groove Dock With Precision Position are fused into one, fixed hole and outer cover bottom weld that two ports of pipeline pass the bottom of outer cover are integral, and spill about 1cm long; " sandblast trace " Dock With Precision Position on " window " of outer cover and the Ball Lenses and be fused into the cavity of a sealing is evacuated by the air exhaust nozzle of reserving on the outer cover.

Embodiment 2, a kind of solar energy free tracking ball lens array power generation system, wherein: Ball Lenses need lean on the support of support could form a float array, adopt triangle or trapezoidal hollow steelframe as the supporting base of support, length according to the Ball Lenses diameter, the interval is slightly larger than the distance of a Ball Lenses on support, weld a pillar and be used for supporting fixedly Ball Lenses, the pillar upper end is hollow structure, be used for welding with Ball Lenses for inserting the glass column core in the cavity, several be provided with Ball Lenses and the glass column core welding in several stent strut cavitys of vacuum heat collector and be fixed on formation one float array on the support.

Embodiment 3, a kind of solar energy free tracking ball lens array power generation system, wherein: the U-shaped structure heat-insulated pipe of multi cellular glass is by a upper outside U-shaped pipe of multi cellular glass that puts two halfbodies of U-shaped glass tube, in aggregates by the fusion joining process assembling, the long two tubes of the two-port of the U-shaped structure heat-insulated pipe of multi cellular glass and the 1cm that two adjacent vacuum heat collector bottoms spill docks assembling, the long outer bore of pipe of the 1cm that spills is a bit larger tham about the interior bore 0.05cm of the U-shaped structure heat-insulated pipe of multi cellular glass, and the arrangement that spills the long pipe way of 1cm is parallel, can not form angle; The energy that utilizes flame gun to focus on, simultaneously the two tubes of the adjacent 1cm length in vacuum heat collector bottom and the interior bore of the U-shaped heat-insulated pipe of multi cellular glass are heated, make it near the melting attitude, to inner slippage Dock With Precision Position, cooling curing can be finished series winding and assembling by the mouth end.

Embodiment 4, a kind of solar energy free tracking ball lens array power generation system, wherein: several minivolleyball lens arras form a super large array focused acquisition sunlight by series parallel connection, fill conduction oil or fused-salt medium in the pipeline, under the effect of pump, heat in the medium conducts the heat exchange tank to retaining, and the water vapor that produces High Temperature High Pressure by heat exchange drives turbine generation; When the application that is used for small size such as roof, the Microturbine generating that needs configuration to be complementary, the electric energy of generation can directly be inputted electrical network, and subsidiary distillation potable water and domestic hot-water is provided simultaneously.

Claims

1. solar energy free tracking ball lens array power generation system, its core component is band vacuum heat collector Ball Lenses, mainly consisted of by diameter 6-10cm Ball Lenses, curved surface heat collecting sheet, pipeline, outer cover, several large component of the U-shaped structure heat-insulated pipe of multi cellular glass, the Ball Lenses surface is coated with anti-reflection coating, makes the coarse trace of " window " docking of confession " support " and outer cover to the required local surfaces of Ball Lenses by blasting craft; Be coated with resistant to elevated temperatures light-absorbing coating and the back side on the curved surface heat collecting sheet and reserve the groove that coincide for pipeline, pipeline and groove Dock With Precision Position are fused into one, fixed hole and outer cover bottom weld that two ports of pipeline pass the outer cover bottom are integral, and spill about 1cm long, " sandblast trace " Dock With Precision Position on " window " of outer cover and the Ball Lenses and be fused into the cavity of a sealing is evacuated by the air exhaust nozzle of reserving on the outer cover; Several are provided with Ball Lenses and the glass column core welding in several stent strut cavitys of vacuum heat collector and are fixed on and form a float array on the support; The U-shaped structure heat-insulated pipe of multi cellular glass is by a upper outside U-shaped pipe of multi cellular glass that puts two halfbodies of U-shaped glass tube, in aggregates by the fusion joining process assembling, the long two tubes of the two-port of the U-shaped structure heat-insulated pipe of multi cellular glass and the 1cm that two adjacent vacuum heat collector bottoms spill docks assembling, the long outer bore of pipe of the 1cm that spills is a bit larger tham about the interior bore 0.05cm of the U-shaped structure heat-insulated pipe of multi cellular glass, and the arrangement that spills the long pipe way of 1cm is parallel, can not form angle; The energy that utilizes flame gun to focus on, simultaneously the two tubes of the adjacent 1cm length in vacuum heat collector bottom and the interior bore of the U-shaped heat-insulated pipe of multi cellular glass are heated, make it near the melting attitude, to inner slippage Dock With Precision Position, cooling curing can be finished series winding and assembling by the mouth end; Several minivolleyball lens arras form a super large array focused acquisition sunlight by series parallel connection, fill conduction oil or fused-salt medium in the pipeline, under the effect of pump, heat in the medium conducts the heat exchange tank to retaining, and the water vapor that produces High Temperature High Pressure by heat exchange drives turbine generation; When the application that is used for small size such as roof, the Microturbine generating that needs configuration to be complementary, the electric energy of generation can directly be inputted electrical network, and subsidiary distillation potable water and domestic hot-water is provided simultaneously.