LV13711B - Solar energy collector with two-plate absorber - Google Patents

Solar energy collector with two-plate absorber Download PDF

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Publication number
LV13711B
LV13711B LV070155A LV070155A LV13711B LV 13711 B LV13711 B LV 13711B LV 070155 A LV070155 A LV 070155A LV 070155 A LV070155 A LV 070155A LV 13711 B LV13711 B LV 13711B
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LV
Latvia
Prior art keywords
absorber
collector
solar energy
mirrors
angle
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LV070155A
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Latvian (lv)
Inventor
Henriks Putans
Imants Ziemelis
Liene Kancevica
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Latvijas Lauksaimniecibas Uni
Lauksaimniecibas Tehnikas Zina
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Application filed by Latvijas Lauksaimniecibas Uni, Lauksaimniecibas Tehnikas Zina filed Critical Latvijas Lauksaimniecibas Uni
Priority to LV070155A priority Critical patent/LV13711B/en
Publication of LV13711B publication Critical patent/LV13711B/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, e.g. solar towers

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  • Optical Elements Other Than Lenses (AREA)

Abstract

The invention concerns solar energy collector devices with tracking the sun collector, and having solar energy concentrators (mirror type reflectors) which absorb concentrated solar energy and transfer it into heat, for example, water heating. The technical task solved by the offered invention is to increase the rate of solar energy concentration on the surface of the absorber by means of the enlargement of number and area of the reflectors. Thus the objective of the invention is to improve the technical parameters of the collector. The goal of the offered invention is attained by forming the absorber of the collector from two plates, placed one in relation to another under certain angle. One side of the plates forms a common edge and the working surfaces of the absorber plates are directed to the reflectors. The angle between the plates is chosen so that the reflected from the mirrors radiation falls on the absorber's plate rear surface under angle as little as possible.

Description

Saules enerģijas kolektors ar divdaļīgu absorberi Izgudrojuma aprakstsDESCRIPTION OF THE INVENTION

Izgudrojums attiecās uz individuālām, Saules kustībai sekojošām saules enerģijas kolektoru ierīcēm ar enerģijas koncentratoriem (spoguļu atstarotājiem), kuras absorbē koncentrētu Saules enerģiju un pārvērš to siltumā, piemēram, sasildot ūdenī. Šāda tipa ierīcēs saules enerģijas kolektora absorbers tiek griezts Saules kustības virzienā tā, lai Saules stari kristu vienmēr perpendikulāri uz tā virsmas, tādā veidā panākot, ka iekārta visu dienas laiku darbojas ar maksimāli iespējamo jaudu un saražo maksimāli iespējamo siltuma enerģijas daudzumu.The invention relates to individual solar collector devices that follow the movement of the sun and incorporate energy concentrators (mirror reflectors) that absorb concentrated solar energy and convert it into heat, for example by heating in water. In this type of device, the absorber of the solar collector is rotated in the direction of the sun's motion so that the rays of the sun always fall perpendicular to its surface, thus ensuring that the unit operates at maximum power and produces the maximum amount of heat energy throughout the day.

Ir zināmas Saules kustībai sekojošas saules enerģijas kolektora ierīces ar atstarotājiem, piemēram, iekārta LR patentā LV 13549, kura sastāv (Fig.la un Fig.lb) no taisnstūra veida rāmja 1, kura vienā galā starp sānu sijām perpendikulāri rāmja plaknei iestiprināts plakans, abpusējs saules kolektors 2, bet otrā galā - rāmja sānos, uz abām pusēm izvietoti atstarotāji (spoguļi) 3. Divu rāmja šķērssiju 4 viduspunktos izveidoti gultņi, kuros ievietoti ass 5 gali 6. Ass 5 tās viduspunktā nostiprināta uz reduktora 7 sekundārās vārpstas 8 nekustīgi un ir tai perpendikulāra. Reduktors savukārt nostiprināts uz cilindriskas statnes 9 tā, lai sekundārās vārpstas slīpuma leņķis attiecībā pret horizontu būtu vienāds ar vietas platuma grāda leņķi. Lai griežoties ap slīpu asi kolektors un spoguļi nesasvērtos uz sāniem, rāmis iestiprināts dakšā, kuras gredzens 10 uzmaukts uz statnes 9, bet zaru 11 augšējie gali uzmaukti uz rāmja sanu sijās iestiprinātām asīm 12. Ierīces rāmja griešanai, tas ir, kolektora un spoguļu orientēšanai uz Sauli, kalpo rāmja stāvokļa sensors 13 un automātikas bloks (Fig.l nav parādīts).Solar collector devices with reflectors following the movement of the sun are known, for example, a device in the patent LV 13549 of the Republic of Latvia consisting of (Figs. La and Fig. Lb) rectangular frame 1 with a flat, reciprocal solar collector 2 and reflectors (mirrors) on both sides of the frame at the other end 3. Bearings formed at the center of two frame cross members 4 with axle 5 ends 6. Axle 5 at its center fixed on gear unit 7 secondary shaft 8 perpendicular to it. The gear unit, in turn, is mounted on a cylindrical rack 9 so that the angle of inclination of the secondary shaft relative to the horizon is equal to the angle of the latitude. In order to prevent the collector and mirrors from rotating about an oblique axis sideways, the frame is mounted on a fork whose ring 10 is mounted on a rack 9 and the upper ends of the tines 11 are mounted on axles 12 mounted on the side rails of the frame. The sun is served by the frame position sensor 13 and the automation unit (Fig. 1 not shown).

Pētot apskatītās ierīces tehniskos rādītājus (Fig.2) noskaidrojās, ka izvietojot katrā rāmja pusē vairākus spoguļus, to darbības efektivitāte samazinās ar katru nākošo spoguli. Tam par iemeslu ir arvien pieaugošais staru krišanas leņķis (leņķis starp kolektora absorbera virsmas normāli un staru), kā rezultātā, liela starojuma enerģijas daļa atstarojas no kolektora stikla un vairāku spoguļu uzstādīšana rindā kļūst nelietderīga. Protams, staru krišanas leņķi var samazināt, palielinot rāmja garumu, bet tas palielina ierīces svaru un gabarītus, prasa augstāku orientēšanas precizitāti, un samazina darbības stabilitāti ārējo faktoru (vēja) iedarbības rezultātā.Examining the technical characteristics of the examined device (Fig.2), it is clear that placing several mirrors on each side of the frame decreases their efficiency with each subsequent mirror. This is due to the ever increasing incident angle of the beam (the angle between the normal and the beam of the collector absorber surface), which results in a large amount of radiation energy reflecting from the collector glass and rendering multiple mirrors rowless. Of course, the angle of incidence of the beams can be reduced by increasing the length of the frame, but this increases the weight and dimensions of the device, requires higher orientation accuracy, and reduces operational stability due to external factors (wind).

Tehniskais uzdevums, ko risina piedāvātais izgudrojums, ir palielināt enerģijas koncentrāciju uz absorbera virsmas, šim nolūkam palielinot atstarojošo spoguļu skaitu un laukumu. Tādējādi izgudrojuma mērķis ir uzlabot ierīces tehniskos rādītājus.The technical problem solved by the present invention is to increase the energy concentration on the absorber surface by increasing the number and area of the reflecting mirrors. Thus, the object of the invention is to improve the technical characteristics of the device.

Piedāvātā izgudrojumā izvirzītais mērķis tiek sasniegts sekojoši. Saules enerģijas kolektors ar divdaļu absorberi (Fig.3) veidots no rāmja 1, kolektora 2, abpusēja absorbera 3, pārseguma (stikla) 4, sijas 5, atstarotājiem (spoguļiem) 6 un piedziņas mehānisma 7. Piedziņas mehānisms griež rāmi orientējot kolektoru un spoguļus uz Sauli. Šī kolektora absorbers izveidots no divām daļām, kuras kolektorā viena attiecībā pret otru novietotas zem noteikta leņķa (Fig.3, leņķis A) un to darba virsmas vērstas uz atstarotāju (spoguļu) pusi. Leņķis starp absorbera daļam izvēlēts tā, lai no spoguļiem atstarotie stari uz šo lokšņu virsmām kristu zem iespējami mazāka leņķa. Piemēram, ja uz katru pusi rindā novietoti 3 spoguļi, tad leņķis A izvēlēts tā, lai no otrā spoguļa stari atstarotos perpendikulāri uz attiecīgā absorbera loksnes virsmas.The object of the present invention is achieved as follows. Solar energy collector with two-part absorber (Fig.3) consists of frame 1, collector 2, double absorber 3, cover (glass) 4, beams 5, reflectors (mirrors) 6 and drive mechanism 7. The drive mechanism rotates the frame by orienting the collector and mirrors to the sun. The absorber of this manifold is made up of two parts, which are arranged at a certain angle (Fig. 3, angle A) with respect to each other and facing the reflectors (mirrors) of their working surfaces. The angle between the parts of the absorber is chosen such that the rays reflected from the mirrors fall to the lowest possible angle on the surfaces of these sheets. For example, if 3 mirrors are placed on each side, the angle A is chosen so that the rays of the second mirror are reflected perpendicularly to the surface of the respective absorber sheet.

Kolektora un absorbera daļu priekšpuse vērsta uz Sauli un tās stari krīt perpendikulāri uz absorbera priekšējās virsmas. Saules staru atstarojums no stikla virsmas ir minimāls. Izejot cauri stiklam, saules stari nonāk uz absorbera virsmas, kas attiecībā pret staru vērsta zem noteikta leņķa. Pateicoties tam, ka absorbera virsmas absorbcijas koeficients parasti ir 95 % un lielāks, tad no absorbera daļu virsmām atpakaļ uz stiklu atstarojas neliels enerģijas daudzums, kas savukārt,atstarojoties no stikla, nonāk atpakaļ uz absorbera otras daļas virsmas. Tādējādi enerģijas zudumi, kas rodas divu lokšņu absorbera frontālajā pusē,ir niecīgi, salīdzinot ar ieguvumu, ko dod spoguļu skaita un to virsmas laukumu palielināšana.The front of the collector and absorber parts face the Sun and its rays fall perpendicular to the front surface of the absorber. The sun's reflection from the glass surface is minimal. As it passes through the glass, the sun's rays reach the surface of the absorber, which is directed at a certain angle to the beam. Due to the fact that the absorption coefficient of the absorber surface is usually 95% and higher, a small amount of energy is reflected from the surfaces of the absorber parts back to the glass, which in turn is reflected back to the other part of the absorber. Thus, the energy losses on the front side of the two-sheet absorber are negligible compared to the benefits of increasing the number of mirrors and their surface areas.

Claims (3)

PretenzijasClaims 1. Saules enerģijas kolektors ar divdaļīgu absorberi, kas satur taisnstūra rāmi, kura vienā galā perpendikulāri rāmja plaknei iestiprināts saules enerģijas kolekors ar absorberi, bet otrā galā - rāmja sānos - uz abām pusēm izvietoti atstarotāji (spoguļi), pie kam rāmis novietots uz reduktora sekundārās vārpstas, kuru griež automātika tā, lai kolektors un spoguļi visu laiku būtu orientēti uz Sauli, atšķirīgs ar to, ka, lai palielinātu starojuma enerģijas koncentrāciju uz kolektora absorbera virsmas, absorbers sastāv no divām daļām, kuras kolektorā novietotas tā, ka starp to plaknēm ir izveidots noteikta lieluma leņķis.1. Solar energy collector with two-part absorber, consisting of a rectangular frame with a solar collector with an absorber mounted at one end perpendicular to the plane of the frame and reflectors (mirrors) on both sides of the frame, with the frame positioned on the secondary gearbox. The shaft rotated automatically so that the collector and mirrors are always oriented towards the sun is different in that, in order to increase the radiation energy concentration on the surface of the collector absorber, the absorber consists of two parts arranged between the planes of the collector created angle of a certain size. 2. Kolektors saskaņā ar 1. pretenziju, kas atšķirīgs ar to, ka abu absorbera daļu vienas malas veido kopēju šķautni, kura orientēta uz atstarotāju (spoguļu) pusi.Manifold according to claim 1, characterized in that the two edges of the absorber portions form one common edge which is oriented towards the reflectors (mirrors). 3. Kolektors saskaņā ar 2. pretenziju, kas atšķirīgs ar to, ka leņķis starp absorbera daļām, kuru virsotne atrodas uz plākšņu kopējās šķautnes, izvēlēts tāds, ka no spoguļiem atstarotie stari uz absorbera minēto daļu virsmām krīt zem iespējami mazāka leņķa.Manifold according to claim 2, characterized in that the angle between the portions of the absorber whose apex is on the common edges of the plates is chosen such that the rays reflected from the mirrors fall below the lowest possible angle on the surfaces of the portions of the absorber.
LV070155A 2007-12-21 2007-12-21 Solar energy collector with two-plate absorber LV13711B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014186832A1 (en) * 2013-05-23 2014-11-27 Ινteχ Holdings Ρty Ltd Solar energy collection apparatus and design method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014186832A1 (en) * 2013-05-23 2014-11-27 Ινteχ Holdings Ρty Ltd Solar energy collection apparatus and design method
CN105358917A (en) * 2013-05-23 2016-02-24 英德科斯控股私人有限公司 Solar energy collection apparatus and design method
AU2014271196B2 (en) * 2013-05-23 2017-09-07 Intex Holdings Pty Ltd Solar energy collection apparatus and design method
CN105358917B (en) * 2013-05-23 2018-04-27 英德科斯控股私人有限公司 Solar energy collecting equipment and design method
US10203133B2 (en) 2013-05-23 2019-02-12 Intex Holdings Pty Ltd Solar energy collection apparatus and design method

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