ITTO20090403A1 - SOLAR THERMAL CONCENTRATOR WITH TWO STAGES. - Google Patents

SOLAR THERMAL CONCENTRATOR WITH TWO STAGES. Download PDF

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Publication number
ITTO20090403A1
ITTO20090403A1 IT000403A ITTO20090403A ITTO20090403A1 IT TO20090403 A1 ITTO20090403 A1 IT TO20090403A1 IT 000403 A IT000403 A IT 000403A IT TO20090403 A ITTO20090403 A IT TO20090403A IT TO20090403 A1 ITTO20090403 A1 IT TO20090403A1
Authority
IT
Italy
Prior art keywords
reflecting surface
rays
secondary mirror
incident
mirror
Prior art date
Application number
IT000403A
Other languages
Italian (it)
Inventor
Claudio Caramello
Original Assignee
Dwa S R L
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dwa S R L filed Critical Dwa S R L
Priority to ITTO2009A000403A priority Critical patent/IT1395643B1/en
Publication of ITTO20090403A1 publication Critical patent/ITTO20090403A1/en
Priority to PCT/IT2010/000227 priority patent/WO2010137051A2/en
Application granted granted Critical
Publication of IT1395643B1 publication Critical patent/IT1395643B1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/79—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with spaced and opposed interacting reflective surfaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S23/80—Arrangements for concentrating solar-rays for solar heat collectors with reflectors having discontinuous faces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/83—Other shapes
    • F24S2023/836—Other shapes spiral
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S23/00—Arrangements for concentrating solar-rays for solar heat collectors
    • F24S23/70—Arrangements for concentrating solar-rays for solar heat collectors with reflectors
    • F24S2023/83—Other shapes
    • F24S2023/838—Other shapes involutes
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Spectrometry And Color Measurement (AREA)
  • Optical Elements Other Than Lenses (AREA)

Description

realizzata con materiali trasparenti alla radiazione solare incidente, ma opachi alla radiazione infrarossa re-irraggiata. L'energia termica proveniente dal sole, viene così catturata all'interno del pannello e trasferita al fluido termovettore. Per limitare le perdite di calore verso l'esterno le zone laterali e posteriore vengono poi protette con materiale isolante. made with materials transparent to incident solar radiation, but opaque to re-radiated infrared radiation. The thermal energy coming from the sun is thus captured inside the panel and transferred to the heat carrier fluid. To limit heat loss to the outside, the side and rear areas are then protected with insulating material.

I pannelli solari piani sono adatti per applicazioni a bassa temperatura, a differenza degli altri dispositivi solari più idonei per applicazioni a media ed alta temperatura. I pannelli solari piani sono per questo motivo preferiti per usi civili, anche perché possono essere facilmente integrati nell'organismo edilizio; i collettori a concentrazione richiedono Flat solar panels are suitable for low temperature applications, unlike other solar devices more suitable for medium and high temperature applications. Flat solar panels are for this reason preferred for civil uses, also because they can be easily integrated into the building organism; concentrating collectors require

A. risolvere i suddetti problemi della tecnica anteriore fornendo un concentratore solare termico a due stadi a media temperatura che si posizioni in maniera ottima per permettere ai raggi incidenti del sole di venire riflessi da uno specchio primario su uno specchio secondario che convoglia A. to solve the aforementioned problems of the prior art by providing a two-stage medium temperature solar thermal concentrator which is optimally positioned to allow the incident rays of the sun to be reflected from a primary mirror onto a secondary mirror which conveys

Claims (4)

RIVENDICAZIONI 1. Concentratore solare termico a due stadi (1) comprendere un primo stadio consistente in almeno uno specchio primario (3} ed un secondo stadio consistente in almeno uno specchio secondario (5), detto specchio primario (3) essendo atto a raccogliere dei raggi solari incidenti (R-L) ed a concentrarli e rifletterli (R2) in detto specchio secondario (5), detto specchio secondario (5) essendo atto a raccogliere detti raggi (R2)ed a concentrarli e rifletterli (R3)in almeno un elemento di assorbimento termico (7), caratterizzato dal fatto che: una superficie riflettente (3a) di detto specchio primario (3) ed una superficie riflettente (5a) di detto specchio secondario (5) sono disposte in cascata; la curvatura della superficie riflettente (5a) dello specchio secondario (5) à ̈ stata definita a forma di spirale avente rapporto A/B tra i raggi degli archi che la generano, detta spirale avendo la caratteristica ottica di riflettere i raggi incidenti ortogonali alla superficie verso il centro della curva che la descrive, in modo che, anche attraverso le riflessioni interne, i raggi incidenti arrivino sempre a essere riflessi in direzione dei vari fuochi, e le posizioni dei quattro fuochi stessi, o centri degli archi che descrivono la spirale, circoscrivano la posizione entro la quale collocare l'elemento di assorbimento termico (7); e la curvatura della superficie riflettente (3a) dello specchio primario (3) à ̈ stata realizzata secondo il principio denominato "edge-ray" che prevede che, se un raggio all'estremo della superficie, incidente secondo il massimo angolo di accettazione, à ̈ trasferito al bordo dell'apertura, questo à ̈ sufficiente per trasferire tutti i raggi incidenti entro l'intervallo di accettazione dell'apertura d'uscita, il fascio di luce incidente sulla superficie essendo riflesso interamente sull'apertura d'uscita. CLAIMS 1. Two-stage solar thermal concentrator (1) comprising a first stage consisting of at least one primary mirror (3} and a second stage consisting of at least one secondary mirror (5), said primary mirror (3) being able to collect rays incident solar (R-L) and to concentrate and reflect them (R2) in said secondary mirror (5), said secondary mirror (5) being able to collect said rays (R2) and to concentrate and reflect them (R3) in at least one absorption element thermal (7), characterized in that: a reflecting surface (3a) of said primary mirror (3) and a reflecting surface (5a) of said secondary mirror (5) are arranged in cascade; the curvature of the reflecting surface (5a) of the secondary mirror (5) has been defined as a spiral having the ratio A / B between the rays of the arcs that generate it, said spiral having the optical characteristic of reflecting the incident rays orthogonal to the surface towards the center d the curve that describes it, so that, even through internal reflections, the incident rays always come to be reflected in the direction of the various foci, and the positions of the four foci themselves, or centers of the arches that describe the spiral, circumscribe the position within which to place the heat absorption element (7); and the curvature of the reflecting surface (3a) of the primary mirror (3) was made according to the principle called "edge-ray" which provides that, if a ray at the extreme of the surface, incident according to the maximum angle of acceptance, à It is transferred to the edge of the opening, this is sufficient to transfer all incident rays within the acceptance range of the exit opening, the light beam incident on the surface being reflected entirely on the exit opening. 2. Concentratore solare termico a due stadi (1) secondo la rivendicazione 1, caratterizzato dal fatto che detto specchio primario (3) à ̈ composto da almeno una porzione di supporto di detta superficie riflettente (3a) sulla quale incidono detti raggi solari (R1)per essere concentrati e riflessi (R2)verso detto specchio secondario (5), detta superficie riflettente (3a) essendo raccordata ad almeno un porzione concava (3b) entro la quale à ̈ ospitato e fissato detto specchio secondario (5). 2. Two-stage solar thermal concentrator (1) according to claim 1, characterized in that said primary mirror (3) is composed of at least a supporting portion of said reflecting surface (3a) on which said solar rays (R1) affect ) to be concentrated and reflected (R2) towards said secondary mirror (5), said reflecting surface (3a) being connected to at least one concave portion (3b) within which said secondary mirror (5) is housed and fixed. 3. Concentratore solare termico a due stadi (1) secondo la rivendicazione 2, caratterizzato dal fatto che detto elemento di assorbimento termico (!) à ̈ disposto all'interno di una concavità di una superficie riflettente (5a) di detto specchio secondario (5). 3. Two-stage solar thermal concentrator (1) according to claim 2, characterized in that said heat absorption element (!) Is arranged inside a concavity of a reflecting surface (5a) of said secondary mirror (5 ). 4. Concentratore solare termico a due stadi (1) secondo la rivendicazione 1, caratterizzato dal fatto di essere atto ad ombreggiare delle superfici di edifici.4. Two-stage solar thermal concentrator (1) according to claim 1, characterized in that it is adapted to shade the surfaces of buildings.
ITTO2009A000403A 2009-05-27 2009-05-27 SOLAR THERMAL CONCENTRATOR WITH TWO STAGES IT1395643B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
ITTO2009A000403A IT1395643B1 (en) 2009-05-27 2009-05-27 SOLAR THERMAL CONCENTRATOR WITH TWO STAGES
PCT/IT2010/000227 WO2010137051A2 (en) 2009-05-27 2010-05-24 Two-stage thermal sun concentrator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO2009A000403A IT1395643B1 (en) 2009-05-27 2009-05-27 SOLAR THERMAL CONCENTRATOR WITH TWO STAGES

Publications (2)

Publication Number Publication Date
ITTO20090403A1 true ITTO20090403A1 (en) 2009-08-26
IT1395643B1 IT1395643B1 (en) 2012-10-16

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
ITTO2009A000403A IT1395643B1 (en) 2009-05-27 2009-05-27 SOLAR THERMAL CONCENTRATOR WITH TWO STAGES

Country Status (2)

Country Link
IT (1) IT1395643B1 (en)
WO (1) WO2010137051A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1401591B1 (en) * 2010-08-03 2013-07-26 Enea Agenzia Naz Per Le Nuove Tecnologie L En E Lo Sviluppo Economico Sostenibile SECONDARY CONCENTRATOR MIRROR FOR HIGH THERMODYNAMIC SOLAR SYSTEMS WITH HIGH ACTION ANGLE.
WO2017105354A1 (en) * 2015-12-14 2017-06-22 Turhan Mehmet Yusuf Spiral shaped solar panel

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1165672A (en) * 1957-01-24 1958-10-28 Centre Nat Rech Scient Static receiver for solar energy concentration
US4088116A (en) * 1976-01-06 1978-05-09 Jose Pastor Radiant energy collector
GB2033103A (en) * 1978-09-21 1980-05-14 Unisearch Ltd Radiation concentrator or distributor
US4230095A (en) * 1978-05-26 1980-10-28 The United States Of America As Represented By The United States Department Of Energy Ideal light concentrators with reflector gaps
US4365616A (en) * 1980-09-15 1982-12-28 Vandenberg Leonard B Self-aligning solar collector
WO2002012799A2 (en) * 2000-08-07 2002-02-14 Ven, Juha Device for utilizing concentrated solar energy
US20030037814A1 (en) * 2001-08-24 2003-02-27 Cohen Gilbert E. Multiple reflector solar concentrators and systems

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1165672A (en) * 1957-01-24 1958-10-28 Centre Nat Rech Scient Static receiver for solar energy concentration
US4088116A (en) * 1976-01-06 1978-05-09 Jose Pastor Radiant energy collector
US4230095A (en) * 1978-05-26 1980-10-28 The United States Of America As Represented By The United States Department Of Energy Ideal light concentrators with reflector gaps
GB2033103A (en) * 1978-09-21 1980-05-14 Unisearch Ltd Radiation concentrator or distributor
US4365616A (en) * 1980-09-15 1982-12-28 Vandenberg Leonard B Self-aligning solar collector
WO2002012799A2 (en) * 2000-08-07 2002-02-14 Ven, Juha Device for utilizing concentrated solar energy
US20030037814A1 (en) * 2001-08-24 2003-02-27 Cohen Gilbert E. Multiple reflector solar concentrators and systems

Also Published As

Publication number Publication date
WO2010137051A3 (en) 2012-08-02
IT1395643B1 (en) 2012-10-16
WO2010137051A2 (en) 2010-12-02

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