CN102072567A - Two-mirror type solar collecting device and system - Google Patents

Two-mirror type solar collecting device and system Download PDF

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Publication number
CN102072567A
CN102072567A CN2011100249684A CN201110024968A CN102072567A CN 102072567 A CN102072567 A CN 102072567A CN 2011100249684 A CN2011100249684 A CN 2011100249684A CN 201110024968 A CN201110024968 A CN 201110024968A CN 102072567 A CN102072567 A CN 102072567A
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CN
China
Prior art keywords
described
focus
mirror
secondary
thermal
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CN2011100249684A
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Chinese (zh)
Inventor
缪同群
伍志军
陈世祥
李钊明
张声荣
李贵涛
张中
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上海新产业光电技术有限公司
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Priority to CN2011100249684A priority Critical patent/CN102072567A/en
Publication of CN102072567A publication Critical patent/CN102072567A/en

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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/40Solar thermal energy
    • Y02E10/44Heat exchange systems

Abstract

The invention discloses a two-mirror type solar collecting device and a two-mirror type solar collecting system. The device is provided with a condensing mechanism and a heated point, wherein the condensing mechanism comprises primary and secondary reflectors to track the sun so as to collect photo-thermal energy; the heated point is positioned on a secondary reflecting focus of the condensing mechanism; the position of the heated point is invariable when the condensing mechanism rotates; and the sunlight is collected by the primary reflector, reflected to the secondary reflector, is subjected to secondary reflection by the secondary reflector and focused on the heated point so as to heat a working medium conveyed in a collector tube connected with the heated point. Because the heated point is heated in a concentrated way, high temperature of the working medium can be achieved. The collecting system collects high-temperature media conveyed by a plurality of collector tubes and externally supplies heat or generates power in a unified mode. The primary and secondary reflectors can track the sun along rotation, and the sunlight is transmitted to the primary reflector vertically, so that an effective receiving area is maximized. Because the spatial position of the heated point is invariable when the primary and secondary reflectors track the sun, the design and installation of the collector tubes are simplified.

Description

A kind of two mirror solar energy heat collector and systems

Technical field

The present invention relates to a kind of solar energy heat collector and system, particularly a kind of to two mirror solar energy heat collectors of sunlight secondary reflection and by its collecting system that constitutes.

Background technology

Solar energy is a kind of very abundant clean energy resource, and is inexhaustible, and the annual solar energy total amount of accepting of the earth is more than 10,000 times that world's year consumes gross energy.The solar light-heat power-generation technology is come the heat transfer working media of heating liquid or gas by the sunshine that converges, and after this part heat is converted to mechanical energy, further is converted into electric energy.Thereby this solar light-heat power-generation technology is one of solar utilization technique that has broad prospect of application.

At present the solar light-heat power-generation technology of main flow has four kinds of tower, slot type, Fresnel formula and dish formulas.

Wherein, tower photo-thermal power generation system is included in a thermal-arrest tower of setting up on the spacious ground, and the heliostat of the some that is provided with around the thermal-arrest tower; Heliostat gathers the thermal-arrest tower with sunshine, makes the working media that wherein conducts heat be heated to high temperature and then generation high-temperature steam, and pushing turbine generates electricity.Though it can obtain higher working media temperature, large-scale application then needs to take tract; And hundreds of easily rice of heliostat distance set thermal tower even last km, high to the positioning accuracy request of heliostat.

Slot type photo-thermal power generation system utilizes the cylinder of strip to throw the face mirror, sunshine is reflexed to the thermal-collecting tube of minute surface focal line position; Fresnel formula photo-thermal power generation system is similar with it, substitutes described cylinder with the concave mirror of Fresnel structure and throws the face mirror.In slot type and the Fresnel formula system, all be to heat working media in the thermal-collecting tube, generate electricity after again the medium heat being gathered together by solar energy.Yet,, cause the loss of energy owing in the process of sun-tracing, can't allow the sunlight vertical incidence to reflecting surface; And, owing to replaced point focusing, need heating whole piece thermal-collecting tube with line focus, cause disperseed by focus, be difficult to obtain very high working media temperature; In addition, owing to need rotate for a long time under HTHP, the layout of described thermal-collecting tube and connection often need well-designed, otherwise are easy to take place situations such as interface cracking, pipeline breakage, and working media is wherein revealed, the service life and the functional reliability of whole device had a significant impact.

Butterfly photo-thermal power generation system utilizes rotational paraboloid mirror independently to carry out the settled date and follows the tracks of, and the small-sized stirling generator that the solar light focusing of incident is provided with on the focus directly generates electricity.Yet because the solar energy of collecting is difficult to storage and concentrates, if the solar energy of each systematic collection is difficult to the stirling generator work that makes power fixing inadequately again, thereby collecting efficiency is not high; And the generation of numerous small-sized decentralized power supplies, giving generates electricity by way of merging two or more grid systems brings inconvenience.

Summary of the invention

The purpose of this invention is to provide a kind of two mirror solar energy heat collector and systems, can sunlight be impinged perpendicularly on the principal reflection mirror, realize the maximization of capture area from the motion tracking sun; Pass through secondary speculum secondary reflection sunshine again, near the thermal-collecting tube the focusing is subjected to focus to concentrate heating, to obtain higher working media temperature; Make the locus that is subjected to focus to be positioned at focus in the tracing process constant, simplify the design and installation of thermal-collecting tube.In collecting system, after the high thermodynamic medium that the thermal-collecting tube of some heat collectors is carried is collected and is gathered, outwards central heating or centralized power generation.

In order to achieve the above object, technical scheme of the present invention provides a kind of two mirror solar energy heat collectors, and it is provided with the optically focused mechanism that comprises principal reflection mirror, secondary speculum, and it is by converging the photo-thermal energy to sunshine with changeing to follow the trail of;

Also be provided with and be subjected to focus, it is positioned on the focus of described optically focused mechanism secondary reflection; Described this locus of focus that is subjected to immobilizes in the process of described optically focused mechanism with the commentaries on classics tracking;

The setting with interval on the reflection path of described principal reflection mirror of described secondary speculum; Sunlight is collected back reflection to described secondary speculum through described principal reflection mirror, and after carrying out secondary reflection by described secondary speculum, focuses on described being subjected on the focus;

Described two mirror solar energy heat collectors also comprise and the described thermal-collecting tube that be connected by focus, and its inside is provided with the working media of heat transfer; This working media is describedly heated by the solar energy on the focus by focusing on, and outwards carries via described thermal-collecting tube.

Described two mirror solar energy heat collectors also comprise mechanical support and transmission mechanism from the described principal reflection mirror of supported underneath; The top of described mechanical support and transmission mechanism is provided with the tracking driver element, and it is controlled, and described principal reflection mirror is rotated or the change at angle of inclination, realize described principal reflection mirror to sunshine with change following the trail of, sunlight is impinged perpendicularly on the described principal reflection mirror.

Described principal reflection mirror is provided with reflective concave surface; Described secondary speculum is fixedly mounted on the reflective concave surface top of described principal reflection mirror by the support that is provided with, and therewith rotates in the process that principal reflection mirror is followed the trail of with commentaries on classics the sun.

The focal position of corresponding sunlight secondary reflection offers breach on the described principal reflection mirror; Described being heated a little is located in this gap position on the principal reflection mirror, makes that to carry out the sun described locus of focus that is subjected to when change following the trail of constant.

Described thermal-collecting tube wears and is fixed in described mechanical support and the transmission mechanism; The described top that is subjected to focus to be arranged on this thermal-collecting tube.

A kind of solar thermal collection system comprises some two mirror solar energy heat collectors;

Each described two mirror solar energy heat collector, comprise sunshine with changeing the principal reflection mirror of following the trail of, rotate and its sunlight reflected is carried out the secondary speculum of secondary reflection with principal reflection mirror, and be positioned at the focus that is subjected on described principal reflection mirror, the secondary speculum secondary reflection focus; Described this locus that is subjected to focus immobilizes with changeing in the tracing process at described principal reflection mirror, secondary speculum;

Each described two mirror solar energy heat collector also comprises and the described thermal-collecting tube that be connected by focus; Heat the working media of flowing through in the described thermal-collecting tube by focusing on the described solar energy of focus that is subjected to;

In the described solar thermal collection system, also comprise a centralized heat energy mechanism, its thermal-collecting tube output with described some two mirror solar energy heat collectors is connected, and receives and the unified working media through heating that flows out in described some thermal-collecting tubes of storing; Described centralized heat energy mechanism exports heat supply with the heat of described working media to the outside, or is dispensed to the some generating equipments that are connected with centralized heat energy mechanism and generates electricity.

Two mirror solar energy heat collector and systems of the present invention, its advantage is: in each heat collector of the present invention, support optically focused mechanism and make its major and minor speculum by mechanical support and transmission mechanism with changeing sun-tracing, keep sunlight vertical incidence on principal reflection mirror, make the capture area maximization.

Compare the line focus of the photo-thermal power generation system of existing slot type and Fresnel formula, sunlight is behind major and minor speculum two secondary reflections among the present invention, be subjected to focus to concentrate heating to the thermal-collecting tube on this secondary reflection focus, can obtain very high working media temperature by this point focusing mode.Because the described locus of focus that is subjected to immobilizes in the process of major and minor speculum sun-tracing, has simplified the design and installation of thermal-collecting tube greatly.

In the collecting system of the present invention, the high thermodynamic medium that the thermal-collecting tube of some heat collectors is carried is collected and is gathered, and reallocation generates electricity for the minority generating equipment, has solved the defective that existing butterfly photo-thermal power generation system generating power supply disperses.

Two mirror solar energy heat collector and systems of the present invention, be applicable to the system that constitutes central solar heating or centralized power generation, its application scale can be selected as required, both can be used for large-scale photo-thermal power generation or heating system, can be applied to as small sized applications such as roofs, residential quarter again.

Description of drawings

Fig. 1 is the general structure schematic diagram of two mirror solar energy heat collectors of the present invention;

Fig. 2 is the structural representation of solar thermal collection system of the present invention.

The specific embodiment

Below in conjunction with description of drawings the specific embodiment of the present invention.

As shown in Figure 1, in the two mirror solar energy heat collectors of the present invention, be provided with the optically focused mechanism that comprises principal reflection mirror 11, secondary speculum 12, and the thermal-collecting tube 20 that is arranged on the secondary reflection focus of described optically focused mechanism is subjected to focus 21.

The principal reflection mirror 11 of described optically focused mechanism is the concave mirror that focusing function is arranged, and the mechanical support and the transmission mechanism 30 of a cylindricality that is provided with by its below support.The top of this mechanical support and transmission mechanism 30 is provided with follows the tracks of driver element 31, can be under the system command control of setting, drive that described principal reflection mirror 11 is rotated or the change at angle of inclination, realize its following the trail of to sunshine with changeing, sunlight can be impinged perpendicularly on the reflective concave surface of principal reflection mirror 11, receive and reflected sunlight with maximum area, maximal efficiency ground.

Described secondary speculum 12 is fixedly installed on the reflective concave surface top of principal reflection mirror 11 by support 121, and rotates together in the tracing process of 11 pairs of sun of principal reflection mirror.12 pairs of sunlight of being collected by principal reflection mirror 11 of described secondary speculum carry out secondary reflection, make it focus on being subjected on the focus 21 of described thermal-collecting tube 20.Can use level crossing (not shown), convex mirror (Fig. 1) or concave mirror (not shown) to constitute described secondary speculum 12, specifically require to decide on focusing on.

Described thermal-collecting tube 20 wears and is fixed in mechanical support and the transmission mechanism 30, is used for the transmission of its internal heat transfer working media.Offer breach near the focus of corresponding sunlight secondary reflection on the described principal reflection mirror 11, make the described focus 21 that is subjected to that is positioned at thermal-collecting tube 20 tops, be located in this gap position on the principal reflection mirror 11.The sunlight concentration of energy of collecting through major and minor speculum can be heated to working media wherein very high temperature in being subjected to focus 21 these small regions.

Described thermal-collecting tube 20 should have heat-insulating property preferably, with the thermal loss of working media when thermal-collecting tube 20 is carried that reduces high temperature.Because in the process of major and minor speculum sun-tracing, the described locus of focus 21 that is subjected to can immobilize, and promptly remains on the secondary reflection focus, has simplified the design and installation of thermal-collecting tube 20 greatly.

Cooperation is referring to Fig. 1, shown in Figure 2, and several above-mentioned two mirror solar energy heat collectors, its thermal-collecting tube 20 outputs separately are connected to same centralized heat energy mechanism 40, constitute a solar thermal collection system.The hot operation medium centralized stores that described centralized heat energy mechanism 40 carries each thermal-collecting tube 20, and export the outside heat supply of medium heat of its collection, or distribute to outside a spot of several generating equipments and generate electricity.This generating equipment can comprise the steam turbine that heat energy is converted into mechanical energy, and the generator that mechanical energy is converted into electric energy.

In sum, two mirror solar energy heat collectors of the present invention are supported optically focused mechanism and are made its major and minor speculum with changeing sun-tracing by mechanical support and transmission mechanism 30, keep sunlight vertical incidence on principal reflection mirror 11, make the capture area maximization.

Compare the line focus of existing slot type and Fresnel formula system, sunlight is behind major and minor speculum two secondary reflections among the present invention, be subjected to focus 21 to concentrate heating to the thermal-collecting tube 20 on this secondary reflection focus, can obtain very high working media temperature by this point focusing mode.Because the described locus of focus 21 that is subjected to immobilizes in the process of major and minor speculum sun-tracing, has simplified the design and installation of thermal-collecting tube 20 greatly.

In the solar thermal collection system of the present invention, the working media of the high heat of described some thermal-collecting tubes output, its medium heat is assigned to the minority generator after gathering and generates electricity through collecting, and has solved the defective that existing butterfly photo-thermal power generation system generating power supply disperses.

Two mirror solar energy heat collector and systems of the present invention, be applicable to the system that constitutes central solar heating or centralized power generation, its application scale can be selected as required, both can be used for large-scale photo-thermal power generation or heating system, can be applied to as small sized applications such as roofs, residential quarter again.

Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple modification of the present invention with to substitute all will be conspicuous.Therefore, protection scope of the present invention should be limited to the appended claims.

Claims (6)

1. a mirror solar energy heat collector is characterized in that, is provided with the optically focused mechanism that comprises principal reflection mirror (11), secondary speculum (12), and it is by converging the photo-thermal energy to sunshine with changeing to follow the trail of;
Also be provided with and be subjected to focus (21), it is positioned on the focus of described optically focused mechanism secondary reflection; Described this locus of focus (21) that is subjected to immobilizes in the process of described optically focused mechanism with the commentaries on classics tracking;
Described secondary speculum (12) setting with interval on the reflection path of described principal reflection mirror (11); Sunlight is collected back reflection to described secondary speculum (12) through described principal reflection mirror (11), and after carrying out secondary reflection by described secondary speculum (12), focuses on described being subjected on the focus (21);
Described two mirror solar energy heat collectors also comprise and the described thermal-collecting tube (20) that be connected by focus (21), and its inside is provided with the working media of heat transfer; This working media is describedly heated by the solar energy on the focus (21) by focusing on, and outwards carries via described thermal-collecting tube (20).
2. two mirror solar energy heat collectors according to claim 1 is characterized in that, also comprise mechanical support and transmission mechanism (30) from the described principal reflection mirror of supported underneath (11); The top of described mechanical support and transmission mechanism (30) is provided with follows the tracks of driver element (31), it is controlled, and described principal reflection mirror (11) is rotated or the change at angle of inclination, realize described principal reflection mirror (11) to sunshine with change following the trail of, sunlight is impinged perpendicularly on the described principal reflection mirror (11).
3. as two mirror solar energy heat collectors as described in the claim 2, it is characterized in that described principal reflection mirror (11) is provided with reflective concave surface; Described secondary speculum (12) is fixedly mounted on the reflective concave surface top of described principal reflection mirror (11) by the support (121) that is provided with, and therewith rotates in the process that principal reflection mirror (11) is followed the trail of with commentaries on classics the sun.
4. as two mirror solar energy heat collectors as described in the claim 3, it is characterized in that the focal position that described principal reflection mirror (11) is gone up corresponding sunlight secondary reflection offers breach; Describedly be subjected to focus (21) to be located in principal reflection mirror (11) to go up this gap position, make that to carry out the sun constant with changeing when following the trail of the described locus of focus (21) that is subjected to.
5. as two mirror solar energy heat collectors as described in the claim 4, it is characterized in that described thermal-collecting tube (20) wears and is fixed in described mechanical support and the transmission mechanism (30); The described top that is subjected to focus (21) to be arranged on this thermal-collecting tube (20).
6. a solar thermal collection system is characterized in that, comprises some two mirror solar energy heat collectors;
Each described two mirror solar energy heat collector, comprise sunshine with changeing the principal reflection mirror of following the trail of (11), rotate and its sunlight reflected is carried out the secondary speculum (12) of secondary reflection with principal reflection mirror (11), and be positioned at and be subjected to focus (21) on described principal reflection mirror (11), secondary speculum (12) the secondary reflection focus; Described this locus that is subjected to focus (21) immobilizes with changeing in the tracing process at described principal reflection mirror (11), secondary speculum (12);
Each described two mirror solar energy heat collector also comprises and the described thermal-collecting tube (20) that be connected by focus (21); Heat the working media of flowing through in the described thermal-collecting tube (20) by focusing on the described solar energy of focus (21) that is subjected to;
In the described solar thermal collection system, also comprise a centralized heat energy mechanism (40), it is connected with thermal-collecting tube (20) output of described some two mirror solar energy heat collectors, receives and the middle working media through heating that flows out of the unified described some thermal-collecting tubes of storage (20); Described centralized heat energy mechanism (40) exports heat supply with the heat of described working media to the outside, or is dispensed to the some generating equipments that are connected with centralized heat energy mechanism (40) and generates electricity.
CN2011100249684A 2011-01-24 2011-01-24 Two-mirror type solar collecting device and system CN102072567A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528207A (en) * 2013-10-12 2014-01-22 十堰榔梅实业有限公司 Butterfly type solar heat concentrating device
CN103851799A (en) * 2014-03-27 2014-06-11 相舆科技(上海)有限公司 Industrial solar ground heat collection device
CN104917453A (en) * 2015-07-14 2015-09-16 上海新产业光电技术有限公司 High concentrating photovoltaic power generation combined heat and power generation system and component structure thereof
CN108213065A (en) * 2017-12-25 2018-06-29 同济大学 For the slot type speculum battle array solar energy heating metal single pile device of thermal desorption processing organic material contaminated soil

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Publication number Priority date Publication date Assignee Title
WO1979001005A1 (en) * 1978-04-28 1979-11-29 Solar Dynamics Ltd Radiation collector
JPH01114666A (en) * 1987-10-27 1989-05-08 Takao Shishido Heat collection device for solar thermal engine
CN1156502A (en) * 1994-07-19 1997-08-06 阿努泰克Pty有限公司 Improved solar collector
CN201314707Y (en) * 2008-04-17 2009-09-23 万斌 Solar double-dish-face heat-energy power generating device
CN101806502A (en) * 2010-04-14 2010-08-18 俞琦 Solar energy collecting system of heliostat
CN101852499A (en) * 2009-04-01 2010-10-06 张�杰 Disc type focusing device capable of adjusting focusing ratio

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1979001005A1 (en) * 1978-04-28 1979-11-29 Solar Dynamics Ltd Radiation collector
JPH01114666A (en) * 1987-10-27 1989-05-08 Takao Shishido Heat collection device for solar thermal engine
CN1156502A (en) * 1994-07-19 1997-08-06 阿努泰克Pty有限公司 Improved solar collector
CN201314707Y (en) * 2008-04-17 2009-09-23 万斌 Solar double-dish-face heat-energy power generating device
CN101852499A (en) * 2009-04-01 2010-10-06 张�杰 Disc type focusing device capable of adjusting focusing ratio
CN101806502A (en) * 2010-04-14 2010-08-18 俞琦 Solar energy collecting system of heliostat

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103528207A (en) * 2013-10-12 2014-01-22 十堰榔梅实业有限公司 Butterfly type solar heat concentrating device
CN103851799A (en) * 2014-03-27 2014-06-11 相舆科技(上海)有限公司 Industrial solar ground heat collection device
CN104917453A (en) * 2015-07-14 2015-09-16 上海新产业光电技术有限公司 High concentrating photovoltaic power generation combined heat and power generation system and component structure thereof
CN108213065A (en) * 2017-12-25 2018-06-29 同济大学 For the slot type speculum battle array solar energy heating metal single pile device of thermal desorption processing organic material contaminated soil

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