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WO2007017541A2 - Systeme de capteurs solaires - Google Patents

Systeme de capteurs solaires Download PDF

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Publication number
WO2007017541A2
WO2007017541A2 PCT/ES2006/000452 ES2006000452W WO2007017541A2 WO 2007017541 A2 WO2007017541 A2 WO 2007017541A2 ES 2006000452 W ES2006000452 W ES 2006000452W WO 2007017541 A2 WO2007017541 A2 WO 2007017541A2
Authority
WO
WIPO (PCT)
Prior art keywords
collectors
flat solar
solar collectors
collector
heat sink
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/ES2006/000452
Other languages
English (en)
Spanish (es)
Other versions
WO2007017541A3 (fr
Inventor
José María Torrens Rasal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2007017541A2 publication Critical patent/WO2007017541A2/fr
Publication of WO2007017541A3 publication Critical patent/WO2007017541A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S50/00—Arrangements for controlling solar heat collectors
    • F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
    • F24D11/003—Central heating systems using heat accumulated in storage masses water heating system combined with solar energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1075—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses solar energy
    • 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

Definitions

  • the present invention relates to a system of flat solar collectors, through which a heat transfer fluid circulates and which are associated forming a battery of solar collectors, in connection with consumptions or heat exchangers of a heating installation, domestic hot water or similar , and temperature limiting means, comprising a heat sink, arranged in parallel with the solar collectors.
  • DHW domestic hot water
  • domestic heating installations it is increasingly common for domestic hot water (DHW) and domestic heating installations to be thermally powered by flat solar collectors, with the consequent advantages of being able to dispense with the supply of fossil fuels, to improve overall energy efficiency and to be absolutely harmless from an environmental point of view.
  • Conventional flat solar collector systems usually comprise a field of collectors, associated in series and in parallel, in whose interior a liquid circulates, which can be water, which is heated by the effect of solar radiation.
  • the collector coatings are currently made of selective materials to the radiation, which allow the passage of solar radiation in one direction and not in the opposite direction, so that all the radiant energy passes to the liquid.
  • the liquid once heated, can circulate by natural convection or by pumping to the domestic installation, where its energy content is consumed in the installation of ACS, heating, pool air conditioners or similar systems, cooling the liquid, and from where it returns , at a lower temperature, to the collector field.
  • the Standard indicates that when this maximum operating temperature on the primary side of consumption is 105 0 C, it is only necessary to have an operating temperature regulation on the secondary side. However, it would be optimal to have means to ensure that the temperature in the primary does not exceed 105 0 C (except the obvious peaks by thermal inertia of up to 115 0 C).
  • the present invention aims to provide a new installation of heating and sanitary hot water by means of solar thermal energy with temperature limiting means that facilitate the achievement of these safety objectives in an easy, autonomous and efficient way.
  • Patent application ES P 200501820 describes a heating and sanitary hot water installation using solar thermal energy, of the type comprising a primary circuit with a solar collector system with heat generator functions, through which a thermal fluid circulates , in series with the consumption or heat exchangers of a heating or sanitary hot water installation, and temperature limiting means, which prevent the temperature of the thermal fluid in the primary circuit from rising above a predetermined maximum temperature, and a safety circuit with an expansion vessel, arranged in parallel with the solar collectors, and which in essence is characterized in that said temperature limiting means comprise a heat sink, arranged in parallel with the solar collectors, preferably an exchanger of copper fin heat.
  • the heat sink can be arranged in the same safety pipe downstream of the expansion vessel, the descending section of said safety pipe extending to the return or entry of the solar collectors through a check valve.
  • the installation comprises a thermostatic sensor valve incorporated at the outlet of the solar collectors, to which it pours the descending section of the safety pipe of the safety circuit and connected to a first end of the heat sink; and a bypass pipe and a connection of the second end of the heat sink to the expansion pipe.
  • This system of solar collectors of the ES P 200501820 does not require permanent personal attention, nor additional or additional electrical installations, does not require of supplementary tanks, or devices with moving elements, such as pumps or fans.
  • the additional fact that it does not require automatisms also contributes to the occurrence of fewer breakdowns.
  • it does not require additional electrical consumption so, as those skilled in the art will appreciate, the overall energy efficiency increases with respect to current conventional solar collector systems.
  • the system of the ES P 200501820 gives rise to two possible schemes, among others, in which the trip to the heatsink is above the collectors and the return to the heatsink is below the collectors.
  • the present invention has as its object some variants and improvements with respect to the manifold system defined in the patent application ES P 200501820, and independently of the expansion vessel safety system. Specifically, the present invention aims at a system of flat solar collectors, applicable to conventional collectors whose interior circulates, in a known way, a heat transfer fluid and which are associated forming a battery of solar collectors, in connection with consumptions or exchangers of heat of a heating installation, sanitary hot water or similar, and temperature limiting means, comprising a heat sink arranged in parallel with the solar collectors.
  • the present invention is characterized, in accordance with the characterizing part of claim 1, by the fact that both the trip to the heatsink and the return thereto is made above the flat solar collectors, which makes The hottest heat transfer fluid in the collector is forced to stir due to the pressure of the colder and denser fluid pressure of the heat sink, producing a fluid circulation in one direction or another.
  • Figs. 1 and 2 are two embodiments of the flat solar collector system of the present invention, in particular for parallel-mounted collector batteries;
  • Figs. 3 to 5 are three other embodiments of the flat solar collector system of the present invention, but for series mounting collector batteries; Y
  • Fig. 6 is a schematic view of a heat sink formed by two parallel finned tubes with square fins, enclosed in a fairing with perforations, corresponding in particular to the double tube embodiment of Fig. 3.
  • the system of flat solar collectors of the present invention through which a heat transfer fluid circulates, for example water with additives, are associated forming a battery of solar collectors 1, in connection with consumptions or heat exchangers 15 of a heating installation, domestic hot water, heated pool or similar, whose water is driven by the pump 16, in series with the consumptions 15 and the collectors (or collectors) 1 through a conduit 8.
  • a heat transfer fluid circulates, for example water with additives
  • the installation is complemented with temperature limiting means, which comprise a heat sink 10, arranged in parallel with the solar collectors 1.
  • Said heat sink is preferably a heat exchanger 10 of copper fins 20.
  • Fig. 6 an example of such a heatsink can be seen, formed, for example and not exclusively, by two tubes 18, 19 finned with flat 20 rectangular copper fins.
  • both the outflow connection 23 of the heatsink 10 and the return connection 24 thereto are arranged above the flat solar collectors 1. This configuration allows that the hottest water in the collector is forced to stir by the effect of the pressure gauge of the coldest and dense water of the heat sink 10, producing a circulation of the fluid in one direction or another.
  • FIGs. 1 and 2 two embodiments of the flat solar collector system of the present invention are represented, in particular for collector batteries 1 of parallel connection or assembly.
  • a check valve 9 preferably a light clapper, such as that described in ES P 200501820. This is valid for at least two 1 collectors with lower inputs and upper outputs.
  • Circulation occurs in the direction from left to right or in reverse due to the higher density of cold water contained in the heatsink with respect to the hottest and therefore of lower density of the water in the collectors 1. Therefore, this unstable equilibrium It cannot be maintained and the water ends up circulating in one direction or another, producing the desired result of dissipating the superheat of the collectors 1, as a safety measure, improvement of the performance and pursuing the purpose of compliance with the EN12828 Standard.
  • Fig. 2 an alternative scheme for series collectors is shown, which comprises a thermostatic sensor valve 12, instead of the check valve, incorporated between the heat sink 10 and at least one serial output of the collector battery solar 1.
  • the temperature sensor 17 is incorporated in the path in the middle of the "T" formed at the outlet of the battery of collectors 1.
  • FIGs. 3 to 5 other three alternative forms of embodiment of the flat solar collector system of the present invention are represented, in particular in this case for batteries of collectors 1 for connection or assembly in series.
  • Fig. 4 a variant is shown with respect to Fig. 3, equipped in this case with a thermostatic sensor valve 12, incorporated between the heat sink 10 and at least one serial output of the solar collector battery 1.
  • the temperature sensor 17 is incorporated in the path in the middle of the "T" formed at the outlet of the battery of collectors.
  • FIG. 5 an evolution of the scheme of Fig. 4 is shown, but applied to three manifolds 1 in series, with a corresponding thermostatic valve 12 that communicates the input of each manifold 1 of the series with a corresponding point 25, initial or intermediate, associated with the heat sink 10.
  • This embodiment is suitable to allow the circulation of water by gravity. It will be understood that it is expandable to another number of collectors greater than three.
  • a heat sink 10 formed by two tubes 18 and 19 in parallel, finned with square fins 20, enclosed in an enclosed fairing 21, provided with perforations or ventilation openings 22, is illustrated.
  • the tubes 18 and 19 protrude for connection with the outlet or return of the collectors.
  • the heatsink of Fig. 6, from which only the first of its 20 square fins is distinguished, may correspond to the heatsink 10 illustrated in the case of Fig. 3.
  • the fairing 21 encloses the check valve 9 and / or thermostatic valve 12, and even come assembled thereby achieving a modular element of easy transport and assembly.
  • the fairing 21 can be made of copper, brass, stainless steel, painted iron, etc., and preferably metallic, for proper heat transmission
  • the distance "d" between the sheet constituting the fairing and the edge of the fin 20 must be tending to zero, in order to achieve a good thermal contact and to collaborate the perforated metal sheet to dissipate the heat additional to the convection through the windows determined by the openings 22.
  • the hot perforated sheet itself transmits heat to the outside by radiation.
  • the openings 22 can be made in the 4 faces of the fairing 21 or only in 3 of its faces, the fourth face being, in this case the frontal, opaque, without appreciable loss of performance.
  • the openings 22 can be rectangular, as in the case shown in Fig. 6, oval, circular or in any other suitable way.
  • the system fully complies with the temperature limitation of the Spanish and European standard UNE-EN 12828, without relying on any kind of electro-automatisms, nor on the supply of electrical energy.
  • this system eliminates the direct cost of all kinds of automatic and manual air and gas traps and large expansion tanks; b) the system admits, like any domestic plumbing installation, the welding of copper pipes and fittings by capillarity (tin-silver) instead of strong welding to the silver of very high price both in material of contribution as in its execution by qualified personnel; c) minimum installation cost, since no valve connections are required in the execution modes with fairing, and transport, due to the greater compactness and the lower number of packages required; and d) minimum maintenance cost, limited to simple supervision.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Photovoltaic Devices (AREA)

Abstract

L'invention concerne un système de capteurs solaires plats. A l'intérieur des capteurs circule un fluide caloporteur et ceux-ci sont associés afin de former une batterie de capteurs solaires, reliée aux consommations ou échangeurs (15) de chaleur d'une installation de chauffage, d'eau chaude sanitaire ou similaire, et des moyens de limitation de température, qui comprennent un dissipateur de chaleur (10), placé en parallèle des capteurs solaires (1) et renfermés dans une enveloppe ou un carénage. Les connexions aller (23) et retour (24) du dissipateur sont disposées au-dessus des capteurs solaires plats, lequel fait que le fluide caloporteur le plus chaud du collecteur se voit obligé de s'agiter sous l'effet de la pression manométrique du fluide le plus froid et dense du dissipateur de chaleur, entraînant une circulation du fluide dans un sens ou dans un autre.
PCT/ES2006/000452 2005-08-08 2006-08-01 Systeme de capteurs solaires Ceased WO2007017541A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200501996A ES2272174B1 (es) 2005-08-08 2005-08-08 Sistema de colectores solares planos.
ESESP200501996 2005-08-08

Publications (2)

Publication Number Publication Date
WO2007017541A2 true WO2007017541A2 (fr) 2007-02-15
WO2007017541A3 WO2007017541A3 (fr) 2007-04-19

Family

ID=37727673

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2006/000452 Ceased WO2007017541A2 (fr) 2005-08-08 2006-08-01 Systeme de capteurs solaires

Country Status (2)

Country Link
ES (1) ES2272174B1 (fr)
WO (1) WO2007017541A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2503261A4 (fr) * 2009-11-19 2017-01-18 José María Torrens Rasal Collecteur solaire avec dissipateur thermique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009063117A1 (fr) * 2007-11-12 2009-05-22 Torrens Rasal Jose Maria Collecteur hydraulique destiné à des collecteurs solaires à dissipateur de chaleur contre la surchauffe
ES2338086B8 (es) 2008-10-30 2011-07-29 Tecnica En Instalaciones De Fluidos Sl Sistema solar termico versatil de produccion de agua caliente hasta alta temperatura.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU1485283A (en) * 1982-05-25 1983-12-01 Actrol Industries Pty. Ltd. Valve for solar heating system
CA2140202C (fr) * 1995-01-13 1999-01-19 Douglas Robinson Sanford Hart Methode utilisee pour proteger du gel les chauffe-eau solaires
DE10030112A1 (de) * 2000-06-19 2001-12-20 Friedrich Udo Mueller Vorrichtung zum Erwärmen oder Kühlen eines fluiden Mediums, insbesondere Sonnenkollektor
WO2006032083A1 (fr) * 2004-09-23 2006-03-30 Rheem Australia Pty Limited Système de protection contre les températures excessives

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2503261A4 (fr) * 2009-11-19 2017-01-18 José María Torrens Rasal Collecteur solaire avec dissipateur thermique

Also Published As

Publication number Publication date
ES2272174B1 (es) 2008-04-16
WO2007017541A3 (fr) 2007-04-19
ES2272174A1 (es) 2007-04-16

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