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WO2010043743A2 - Récepteur solaire perfectionné pour collecteurs cylindriques-paraboliques - Google Patents

Récepteur solaire perfectionné pour collecteurs cylindriques-paraboliques Download PDF

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Publication number
WO2010043743A2
WO2010043743A2 PCT/ES2009/070429 ES2009070429W WO2010043743A2 WO 2010043743 A2 WO2010043743 A2 WO 2010043743A2 ES 2009070429 W ES2009070429 W ES 2009070429W WO 2010043743 A2 WO2010043743 A2 WO 2010043743A2
Authority
WO
WIPO (PCT)
Prior art keywords
metal tube
tube
protective cover
solar receiver
parabolic
Prior art date
Application number
PCT/ES2009/070429
Other languages
English (en)
Spanish (es)
Other versions
WO2010043743A3 (fr
Inventor
Jorge Insa Tello
Jesús SANTOS EGEA
Jorge Sampedro Feito
Francisco Javier Gala Lupiani
Original Assignee
Iberdrola Ingeniería Y Construcción, S. A. U.
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 Iberdrola Ingeniería Y Construcción, S. A. U. filed Critical Iberdrola Ingeniería Y Construcción, S. A. U.
Publication of WO2010043743A2 publication Critical patent/WO2010043743A2/fr
Publication of WO2010043743A3 publication Critical patent/WO2010043743A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/40—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors
    • F24S10/45—Solar heat collectors using working fluids in absorbing elements surrounded by transparent enclosures, e.g. evacuated solar collectors the enclosure being cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S40/00—Safety or protection arrangements of solar heat collectors; Preventing malfunction of solar heat collectors
    • F24S40/80—Accommodating differential expansion of solar collector elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S2025/601—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules by bonding, e.g. by using adhesives
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S25/00—Arrangement of stationary mountings or supports for solar heat collector modules
    • F24S25/60—Fixation means, e.g. fasteners, specially adapted for supporting solar heat collector modules
    • F24S2025/6012—Joining different materials
    • F24S2025/6013—Joining glass with non-glass elements
    • 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
    • F24S23/74—Arrangements for concentrating solar-rays for solar heat collectors with reflectors with trough-shaped or cylindro-parabolic reflective surfaces
    • 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

Definitions

  • the invention refers to a solar receiver perfected for parabolic trough collectors, which provides several advantages and innovative characteristics, apart from others inherent to its configuration and organization, and which will be described in detail later, which represent a remarkable improvement compared to what is already known in this field for the same purpose.
  • the object of the invention is focused on a solar receiver of the type constituted by an absorber tube, whose purpose is to transform the solar irradiation into thermal power by heating a thermal or caloric fluid that runs through it, being carried out said transformation by the concentrated incidence of solar irradiation in each parabolic trough collector properly disposed in front of the tube; in which said tube has the particularity of having a series of improvements that substantially improve its effectiveness.
  • the new absorber tube has, among other novel aspects, a vacuum valve that allows the vacuum between the outer surrounding cover and the inner metal tube once again, once put into operation, with a closure between the cover and the metallic tube of adhesive type that advantageously allows, in case of failure, to be easily replaced with the manifold mounted, without the complete replacement of the absorber tube being necessary.
  • FIELD OF APPLICATION The field of application of the present invention is within the industry sector dedicated to the manufacture of parabolic trough collectors for solar thermal plants.
  • thermo-solar plants with parabolic trough collector technology are based on the concentration of solar energy on a receiver or absorber tube by means of a collector mirror on a thermal, calorific or heat-carrying fluid, from which it is gradually extracted. energy to move a turbine and a generator.
  • the absorber tube generally comprises the following elements:
  • An inner metal tube, through which the thermal fluid circulates being generally made of steel due to the range of pressures, temperatures and mechanical stresses to which it is subjected under operating conditions.
  • the surface of the metal tube since the characteristics of the The surface of said metal tube depends largely on the efficiency with which the solar irradiation reflected by the parabolic profile of the collector is transformed into thermal power in the form of thermal fluid. Therefore, the surface of the metal tube must have a high absorbency in the solar radiation spectrum and a reduced thermal emissivity at the operating temperature, a function that said coating fulfills.
  • a protective cover whose purpose is to protect the compounds of the selective coating of the metal tube from atmospheric agents (mainly environmental humidity and oxygen) by which it presents a low permeability to the gases of the atmosphere, allowing as much as possible the passage of the solar radiation, so it has a high transmissivity to solar radiation (wavelengths less than 2.5 ⁇ m, and reduce, as far as possible, the thermal losses of the metal tube to the environment, so it has a reduced Infrared radiation transmissivity, the boron silicate glass of low alkali content, commonly called “Pyrex" being the most appropriate and generally used material.
  • atmospheric agents mainly environmental humidity and oxygen
  • An anti-reflective coating of the protective cover to improve the optical qualities of the glass, applied to both its outer and inner surface, which, given the working conditions to which it is exposed, has a high adhesion to the glass.
  • ES2125828 which discloses a system of Slot solar collectors in which the absorber is composed of a conduit tube through which the fluid that carries the heat circulates and an outer envelope tube so that there is an annular space between them. Since the tubes are of different material and the absorbers work at high temperatures, there are differences in their behavior and also in irradiation in certain areas. As a solution it is proposed to fill this annular space with a medium that thermally joins both zones.
  • ES2259254 which discloses a receiver for solar collectors consisting of two tubes, the interior is the absorption tube, and the exterior, glass, is the envelope tube.
  • This wrapping tube comprises a structure that focuses on the absorption tube to improve system performance, it being possible to place this structure on the inner or outer side of the tube.
  • a plurality of prisms or a saw-shaped blade are proposed.
  • ES 2251320 which discloses a concave parabolic manifold whose absorber comprises expansion compensators to dampen the different radiation behaviors of the absorber tube and the surrounding surrounding tube. It also includes a reflector collar that reflects solar radiation in the absorber's active zone to improve system efficiency.
  • WO2007076578 discloses a system of parabolic trough collectors with an absorber formed from a metal tube through which the fluid circulates surrounded by a glass tube. It also includes a helmet-shaped vacuum element that can be placed on the outside of the glass tube or on the inside, by means of supports.
  • This helmet is made of thermally insulating material such as fiberglass or rock, polyurethane, etc. and it has a film that reflects the radiation emitted by the absorber tube.
  • US5460163 which discloses a collector for solar systems whose absorber has the characteristic of acting as a vaporization chamber. It is formed by two concentric tubes and in the annular chamber existing between both steam is formed which is condensed on the outer surface of the inner tube and evacuated into a structure located in the inner zone of the outer tube.
  • US2004055593 discloses an absorber for parabolic trough collectors formed by an outer glass tube inside which the vacuum has been achieved and in which the absorber tube itself is located.
  • This element is located eccentrically with respect to the outer tube, and is formed by an absorption tube through which the working fluid circulates, with absorption sheets welded inside and with a curved shape to direct the sun's rays towards the tube.
  • the absorber is surrounded by a reflection channel that redirects the radiation reflected by the absorber back towards it. In this channel there is a hole in the focal line of the collector through which the sun's rays penetrate.
  • DE10033240 which discloses an absorber tube for solar energy collector systems, formed by an outer tube and an inner tube through which the working fluid circulates in which, as in the patent anterior, the inner tube is offset with respect to the axis of the outer tube.
  • the proposed configuration indicates that the inner surface of the outer tube is partially occupied by mirrors, and that the absorber tube is away from the axis in the opposite direction to said mirrors.
  • the configuration is completed with a sheet that acts as a flat absorber.
  • DE102006056536 which discloses an absorber, and a method to produce it, for parabolic collectors in which there is a reflective protective layer that, in this case, reflects the waves in the infrared range.
  • This protective layer is configured from two layers, and is composed of gold, silver, platinum or copper.
  • US2007034204 which discloses an absorber tube for use in parabolic collectors consisting of a metal central tube, a glass tube surrounding it and a bellows structure as an expansion compensation element that allows the relative movement of both tubes. There is a connection element of the internal part of the bellows element with the central tube and that extends into the annular space between them. Between the compensating element and the outer tube there is an absorbent filler element.
  • the absorber tubes are gradually emptying due to microscopic imperfections of their elements, which causes that after a while there is air inside the tube, despite the failure of glass-metal welding.
  • the tube in the known absorbers, the tube must also be changed, since in them the replacement of the vacuum is not economically viable again, a new glass tube, a new "getters", two additional glass-metal welds are required to be carried out in a specialized workshop, etc.
  • solar receiver perfected for parabolic trough collectors that the present invention proposes is configured, as a remarkable novelty within its field of application, since, to In accordance with its creation, it is achieved, in a restrictive way, to satisfactorily solve the aforementioned objectives as suitable, being the characterizing details that make it possible and that distinguish it, adequately included in the final claims that accompany this specification.
  • the solar receiver perfected for parabolic trough collectors that the invention advocates is configured in a conventional manner from essentially from an inner metal tube, constituting the absorber tube itself, through which the thermal fluid circulates, and which, preferably, is made of steel.
  • said metal tube has, on the outside, a selective coating with a high absorption capacity in the solar radiation spectrum, and a reduced thermal emissivity at the operating temperature, it being provided for that coating is chemically stable in the presence of air and at a temperature of up to 450 0 C.
  • a protective cover consisting of a glass tube is contemplated on the metal tube, whose purpose is essentially to protect the compounds of the selective coating provided on the surface of the metal tube, allowing a high transmissivity of solar radiation and a reduced transmissivity to infrared radiation to minimize thermal losses to the environment.
  • an anti-reflective treatment is applied to the outer and inner surface of the said protective cover, which will be of high adhesion, given the working conditions to which it is exposed.
  • the solar receiver also has a conventional thermal expansion compensator designed to absorb the difference in expansion lengths that, under operating conditions, have the protective glass cover and the inner metal tube, which is composed of three elements: one rigidly attached to the metal tube, another rigidly attached to the protective cover and another constituted by a bellows, which is what really absorbs the aforementioned difference in lengths.
  • the closure of the protective cover with the metal tube is carried out having as an intermediate element the thermal expansion compensator, which is rigidly attached to the metal tube by welding, while joining the protective cover by means of an adhesive applied by a method specially developed for this purpose.
  • vacuum is created in the annular space between the two elements. Said vacuum is created through a valve installed in the protective cover. To this end, a vacuum pump is connected to said valve, when initially the absorber tube or solar receiver is put into operation, allowing said operation to be repeated from time to time, as appropriate, without the need to disassemble the solar receiver.
  • Figure number 1 Shows an elevational view of an embodiment of the improved solar receiver for parabolic trough collectors object of the invention, which shows the main parts of which it consists, as well as the configuration and arrangement of the same.
  • the solar receiver (1) recommended is essentially configured from a metal tube (2) internal, constituent of the absorber tube itself, through which the thermal fluid circulates, and which, preferably, is made of steel, with an external diameter that covers a range of between 70mm and 105mm.
  • Said metal tube (2) has, externally, a selective coating that is chemically stable in the presence of air and at a temperature of up to 450 0 C.
  • a protective cover (3) consisting of a glass tube is contemplated, whose purpose is essentially to protect the compounds of the selective coating provided on the surface of the metal tube (2), allowing a high transmissivity of solar radiation and reduced transmissivity to infrared radiation to minimize thermal losses to the environment.
  • This protective cover (3) preferably has a diameter between 125mm and 187.5mm.
  • a high adhesion anti-reflective treatment is applied to the outer and inner surface of said protective cover (3).
  • the solar receiver (1) also has a thermal expansion compensator (4) designed to absorb the difference in expansion lengths that the protective glass cover (3) and the inner metal tube (2) have, said being compensator (4) composed of three elements: one rigidly attached to the metal tube (2), another rigidly attached to the protective cover (3) and another constituted by a bellows, and that is what really absorbs the aforementioned difference in lengths.

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)
  • Photovoltaic Devices (AREA)
  • Optical Elements Other Than Lenses (AREA)
  • Mounting And Adjusting Of Optical Elements (AREA)

Abstract

La présente invention concerne un récepteur solaire perfectionné pour des collecteurs cylindriques-paraboliques qui est formé d'un tube métallique (2) intérieur à revêtement sélectif, d'une enveloppe de protection (3) en verre et d'un compensateur (4) de dilatations thermiques, un vide étant créé dans l'espace (6) situé entre le tube métallique et l'enveloppe de protection, la fermeture de l'enveloppe de protection étant réalisée au moyen du compensateur (4), lui-même constitué de trois éléments: un premier qui est soudé au tube métallique (2), un deuxième qui est lié à l'enveloppe de protection (3) au moyen d'un adhésif (5) et un soufflet. Pour créer le vide, on utilise une valve (7) installée dans l'enveloppe de protection (3) pour le raccordement d'une pompe à vide.
PCT/ES2009/070429 2008-10-14 2009-10-09 Récepteur solaire perfectionné pour collecteurs cylindriques-paraboliques WO2010043743A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200802897 2008-10-14
ES200802897A ES2375006B1 (es) 2008-10-14 2008-10-14 Receptor solar perfeccionado para colectores cilindro-parabólicos.

Publications (2)

Publication Number Publication Date
WO2010043743A2 true WO2010043743A2 (fr) 2010-04-22
WO2010043743A3 WO2010043743A3 (fr) 2010-09-02

Family

ID=42106968

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2009/070429 WO2010043743A2 (fr) 2008-10-14 2009-10-09 Récepteur solaire perfectionné pour collecteurs cylindriques-paraboliques

Country Status (3)

Country Link
AR (1) AR073827A1 (fr)
ES (1) ES2375006B1 (fr)
WO (1) WO2010043743A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102927707A (zh) * 2012-11-07 2013-02-13 江苏尚森太阳能科技发展有限公司 太阳能集热管
CN102927706A (zh) * 2012-11-07 2013-02-13 江苏尚森太阳能科技发展有限公司 一种太阳能集热管
CN104154667A (zh) * 2014-08-27 2014-11-19 北京恒聚化工集团有限责任公司 一种菲涅尔式太阳能风电能互补的集热管
CN104315726A (zh) * 2014-04-22 2015-01-28 大连金州新区金科科技培训服务中心 玻璃真空集热管装有保护套的太阳能热水器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2462840B1 (es) * 2012-11-22 2015-05-14 Abengoa Solar New Technologies S.A. Dispositivo compensador de expansión con vaso posicionador
DE102014218333B9 (de) * 2014-09-12 2016-09-01 Schott Ag Verfahren und Vorrichtung zum Einleiten von Schutzgas in ein Receiverrohr
DE102016201654B3 (de) * 2016-02-03 2017-03-02 Schott Ag Verfahren und Vorrichtung zum Entladen eines Wasserstoffspeichers bei Parabolrinnenreceivern
DE102016201652B3 (de) * 2016-02-03 2017-02-23 Schott Ag Verfahren zum Entladen eines Wasserstoffspeichers bei Parabolrinnenreceivern
ES2725975A1 (es) * 2018-03-28 2019-10-01 Vera Jose Carlos Cancho Procedimiento y dispositivo para reparar o mejorar tubos absorbedores de o para instalaciones termosolares

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2071305A (en) * 1977-09-26 1981-09-16 Enthone Solar collectors
US4409964A (en) * 1979-12-22 1983-10-18 Sharp Kabushiki Kaisha Solar heat collector assembly
US4703749A (en) * 1982-09-30 1987-11-03 Morse Roger N Solar apparatus
US5009218A (en) * 1985-11-29 1991-04-23 Baechli Emil Heat-insulating building and/or light element
DE10335214A1 (de) * 2003-08-01 2005-03-03 Holger Schweyher Kollektor für ein solarthermisches Kraftwerk
CN2924411Y (zh) * 2006-07-15 2007-07-18 张寅啸 伸缩节流道真空太阳能集热管

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10231467B4 (de) * 2002-07-08 2004-05-27 Schott Glas Absorberrohr für solarthermische Anwendungen
ES2313084T3 (es) * 2004-09-06 2009-03-01 Holger Schweyher Tubo de absorcion.
DE102005022183B3 (de) * 2005-05-09 2006-08-03 Schott Ag Absorberrohr

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2071305A (en) * 1977-09-26 1981-09-16 Enthone Solar collectors
US4409964A (en) * 1979-12-22 1983-10-18 Sharp Kabushiki Kaisha Solar heat collector assembly
US4703749A (en) * 1982-09-30 1987-11-03 Morse Roger N Solar apparatus
US5009218A (en) * 1985-11-29 1991-04-23 Baechli Emil Heat-insulating building and/or light element
DE10335214A1 (de) * 2003-08-01 2005-03-03 Holger Schweyher Kollektor für ein solarthermisches Kraftwerk
CN2924411Y (zh) * 2006-07-15 2007-07-18 张寅啸 伸缩节流道真空太阳能集热管

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102927707A (zh) * 2012-11-07 2013-02-13 江苏尚森太阳能科技发展有限公司 太阳能集热管
CN102927706A (zh) * 2012-11-07 2013-02-13 江苏尚森太阳能科技发展有限公司 一种太阳能集热管
CN104315726A (zh) * 2014-04-22 2015-01-28 大连金州新区金科科技培训服务中心 玻璃真空集热管装有保护套的太阳能热水器
CN104154667A (zh) * 2014-08-27 2014-11-19 北京恒聚化工集团有限责任公司 一种菲涅尔式太阳能风电能互补的集热管

Also Published As

Publication number Publication date
WO2010043743A3 (fr) 2010-09-02
ES2375006B1 (es) 2013-01-24
ES2375006A1 (es) 2012-02-24
AR073827A1 (es) 2010-12-01

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