WO2009013578A2 - Panneau solaire pour chauffage de fluide - Google Patents

Panneau solaire pour chauffage de fluide Download PDF

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Publication number
WO2009013578A2
WO2009013578A2 PCT/IB2008/001820 IB2008001820W WO2009013578A2 WO 2009013578 A2 WO2009013578 A2 WO 2009013578A2 IB 2008001820 W IB2008001820 W IB 2008001820W WO 2009013578 A2 WO2009013578 A2 WO 2009013578A2
Authority
WO
WIPO (PCT)
Prior art keywords
chamber
solar panel
panel according
manifold
case
Prior art date
Application number
PCT/IB2008/001820
Other languages
English (en)
Other versions
WO2009013578A3 (fr
Inventor
Francesco Bianconi
Original Assignee
Edn 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 Edn S.R.L. filed Critical Edn S.R.L.
Publication of WO2009013578A2 publication Critical patent/WO2009013578A2/fr
Publication of WO2009013578A3 publication Critical patent/WO2009013578A3/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
    • F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
    • F24S10/74—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits are not fixed to heat absorbing plates and are not touching each other
    • F24S10/742—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits the tubular conduits are not fixed to heat absorbing plates and are not touching each other the conduits being parallel to each other
    • 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
    • F24S40/70—Preventing freezing
    • 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
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S90/00—Solar heat systems not otherwise provided for
    • F24S90/10—Solar heat systems not otherwise provided for using thermosiphonic circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • F24S80/50—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings
    • F24S80/56—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings characterised by means for preventing heat loss
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal
    • 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 present invention refers to a solar panel for fluid heating, preferably for water heating.
  • the solar panel object of the present invention is used to heat circulating water in civilian facility plants such as, for example, apartments, gymnasia, schools, etc., everywhere it would be necessary to provide with a heated running water system.
  • said panels of the known art comprise a case, covered on top by a heat shield oriented towards the sun, and defining at least one chamber comprising a pipe or manifold array within generally a chemical solution of antifreeze liquid is flowing.
  • the liquid solution is conveyed by natural circulation outward the panel to an heat exchanger, being in contact, in its turn, with a colleting manifold containing the water to be heated.
  • solar panels are known as well wherein the manifold comprising the water to be heated is directly disposed inside the solar panel chamber, such that the water heating would take place without aiding of more heat exchangers interposed between the manifold and the heat shield.
  • Applicant's name describes a solar panel comprising a case provided with an inner chamber wherein a collecting manifold for water is placed. Inside the manifold the water is stationary and absorbs the heat transferred from the manifold walls, in its turn being heated by sunbeams passing through the heat shield.
  • a solar panel comprising a coil shaped manifold conveying the liquid to be heated, preferably water, into a second reservoir - shaped manifold, comprised in the solar panel chamber too and subjected to the sunbeam action passing through the upper heat shield of the panel. Liquid passing from the coil to the reservoir takes place by using electric pumps activating at the water need demanded by the user.
  • the manifold with a pipe shape, is housed within the chamber described by the parabolic mirror and the double heat - resistant glass, and is placed coaxially to the mirror focal axis, so as to be efficiently heated by the sunbeams.
  • the panel is provided with means for heating the water contained in the manifold as well, that become active when the water temperature in the manifold decreases too much.
  • Said means comprise an electric resistance and a thermostat for measuring the temperature of the water to be heated.
  • the fluid heating panel comprises a case open on top and provided with at least one chamber accommodating one or more manifolds for the fluid to be heated, said at least one chamber being closed by a transparent screen exposed to the sunlight and located at the top opening of said case.
  • the panel further comprises means for controlled heating of said at least one chamber.
  • the heating means that are present inside the chamber would avoid the temperature decreasing thereof under a possibly dangerous value because of the freezing of the water contained in the manifold/s. And this takes place with a reduced electric power; indeed the exchanged fluid is not the water contained in the manifold, as would happen in the panels of the known art above described, but the gas, preferably selected from air, inert gas, or nitrogen, contained in the chamber.
  • the claimed panel allows to produce warm water all the year round, without the need of antifreeze agents, and hence in a wholly ecological way.
  • Said means for controlled heating of the chamber comprise at least one electric resistance disposed at the inner surface of said case and preferably activated by a thermostat.
  • the transparent screen might preferably be a double heat - resistant glass constrained to the chamber by silicone resins, or, in a completely equal way, by a mutually interference coupling.
  • the case and the collecting manifolds are composed of a metallic material, particularly aluminum or stainless steel, to thereby aid the heat transfer with the liquid to be heated.
  • figure 1 is an axonometric view of the panel according to the invention
  • figure 2 is a section view of the panel of figure 1
  • Figure 3 is a top view of the solar panel collecting manifolds according to the invention
  • - figure 4 is a top view of the solar panel of figure 1 ;
  • Figure 5 is a section view of the panel according to a second embodiment
  • Figure 6 is a section view of the panel according to a third embodiment of the invention. DETAILED DESCRIPTION OF SOME PREFERRED EMBODIMENTS OF THE INVENTION
  • Panel 1 a solar panel for fluid heating, preferably for heating water, according to a preferred aspect of the present invention.
  • Panel 1 comprises a case 2 provided with a chamber 3 accommodating a collecting manifold 4 for the liquid to be heated.
  • the chamber 3 is closed by a transparent screen 5 exposed to sunlight and situated at the top opening 10 of said case 2.
  • the case 2 and transparent screen 5 coupling is obtained by the use of silicone resins 30 and it is able to seal the chamber 3.
  • the manifold 4 While operating, the manifold 4 is replenished with water when a water request by the user occurs only.
  • the water flows into the manifold through the inlet 15 and flows out therefrom through the outlet 16, but it is stationary inside the manifold during the periods wherein the heated water is not requested.
  • the manifold 4 is composed of a parallel pipe array whose ends are joined by a pipe 80, which is preferably with a squared shape, it is placed perpendicularly to said pipe array, and it is disposed in proximity of the innermost surface 25 of the chamber 3, that is, in its turn, coated with insulating panels 26, to further improve the panel efficiency 1.
  • the manifold 4 could be alternatively any other container adapted to confine the fluid to be heated within the panel 1 , and particularly could be a coil of a closed circuit of a heat exchanger.
  • the inventive object of the present invention might be applied in the same way in the solar panels too wherein the heating of the fluid employed by the user is obtained, by a heat exchanger, thanks to the preventive heating inside the panel, by sunbeams, of an operating fluid contained in a closed circuit.
  • means 11 are further disposed for the controlled heating of such a chamber 3.
  • the means 11 for the controlled heating of the chamber 3, in the particular embodiment herein illustrated, comprise an electric resistance 12 connected to a thermostat 13, that might be placed inwardly or outwardly the chamber 3, as well as supply means for the resistance 12 and for the thermostat 13, such as for example mains or battery connection.
  • a thermostat 13 that might be placed inwardly or outwardly the chamber 3, as well as supply means for the resistance 12 and for the thermostat 13, such as for example mains or battery connection.
  • the battery might be situated inside the case 2 too in such a way that the panel 1 would be completely independent from any external electric power supply.
  • the electric resistance 12 is not inside the manifold 4 wherein the liquid to be heated is, but upon one of the inner surfaces of the chamber 3, in such a way to heat the air, or another gas, being contained therein. It goes without saying that the power used to heat the air that is inside the chamber 3 is considerably lower than that would be used to directly heat the water that is inside the duct 4.
  • the thermostat 13 according to the temperature inside the chamber 3 or outside the panel 1, might allow or avoid the electric resistance 12 supply and then the chamber 3 heating.
  • the chamber 3 temperature mainly during the nighttime, is maintained always at such a level to avoid the freezing of the water contained in the manifold 4.
  • the chamber 3 thanks to the heating produced by the resistance 12 placed therein, behaves as a heat barrier, protecting the manifold 4 from the cooling induced by the outside temperature. Thereby the water contained in the manifold 4, ready to be used when requested by the user, is maintained at a temperature higher than the freezing temperature.
  • the heating control of the chamber 3 might also be manually realized by, for example, a switch of the ON / OFF type, without the aid of thermostat 13 controlling the resistance 12 operation. In case such a heating control is manually realized, anyway the result obtained would prevent the freezing of the liquid inside the manifold 4, even if in that case it would be no more the temperature inside the chamber 3 to remain constant, but the heat sent out from the resistance 12.
  • the effect produced by the heating means 11 use is double, indeed if on one hand it will prevent the water freezing inside the manifold, on the other hand it will allow a more rapid and effective re-establishment of the panel 1 operation during the start-up transients.
  • the electric resistance 12 is placed at the inner surface 18 of the insulating panels 26, constrained thereto for example by gluing, whereas the thermostat 13 is situated, in the embodiment of the invention herein described, outside the case 2, connected to an electric power supply such as the battery 60, for example.
  • the battery 60 might be alternatively substituted by an accumulator connected, by appropriate power conversion means, to one or more photovoltaic cells, so that to render the panel 1 operation substantially independent.
  • the electric resistance 12 itself might be placed inside the case wall 2 or, as illustrated in figure 5, over the innermost surface 25 of the case 2. In such a case, on the insulating panel
  • the chamber 3 might contain a gas selected from air, inert gas or nitrogen, and it is able to guarantee a thermal insulation from the outside that is as higher as lower is the gas pressure in its inside.
  • the chamber 3 might be led to a pressure lower than the atmospheric pressure by means for pressure modulating, for example, of the vacuum pump or compressor type (here not illustrated) that can be connected to the chamber 3 by a valve 40 disposed on the case 2.
  • case 2 and the collecting manifold 4 are realized in a metallic material.
  • the case 2 might be composed of aluminum, preferably an aluminum - magnesium alloy
  • the collecting manifold 4 might be composed preferably of stainless steel.
  • the case and the collecting manifold might be realized with the same material, for example, stainless steel or aluminum alloy, or the first in stainless steel and the second in aluminum, without for this exiting from the scope of protection of the present invention.
  • the panels 26 could be disposed inside the chamber 3 too and conveniently shaped to accommodate, at least partially, the manifolds 4, until they fill up the chamber 3 for about half of its volume.
  • the resistance 12 is disposed on the inner surface of the screen 5, instead of on the inner surface 25 of the case 2, with the scope to be able to adequately heat the chamber 3.
  • Such an embodiment of the present invention allows to obtain an energy saving still more relevant than the solar panels of the known art.

Landscapes

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

Abstract

L'invention concerne un panneau solaire pour chauffage de fluide, comprenant un boîtier, ouvert sur le dessus, et comportant au moins une chambre recevant un ou plusieurs collecteurs pour le fluide à chauffer, ladite au moins une chambre étant fermée par un écran transparent exposé au rayonnement solaire et située au niveau de l'ouverture supérieure dudit boîtier, caractérisé par le fait qu'il comprend des moyens pour un chauffage commandé de ladite au moins une chambre.
PCT/IB2008/001820 2007-07-20 2008-07-11 Panneau solaire pour chauffage de fluide WO2009013578A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2007A001465 2007-07-20
IT001465A ITMI20071465A1 (it) 2007-07-20 2007-07-20 Pannello solare per il riscaldamento di acqua

Publications (2)

Publication Number Publication Date
WO2009013578A2 true WO2009013578A2 (fr) 2009-01-29
WO2009013578A3 WO2009013578A3 (fr) 2009-11-05

Family

ID=40281898

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/001820 WO2009013578A2 (fr) 2007-07-20 2008-07-11 Panneau solaire pour chauffage de fluide

Country Status (2)

Country Link
IT (1) ITMI20071465A1 (fr)
WO (1) WO2009013578A2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975454A (zh) * 2010-08-13 2011-02-16 佛山市高明区通洋高科太阳能有限公司 一种太阳能热水器的循环加热装置及其循环加热方法
CN101975467A (zh) * 2010-08-13 2011-02-16 佛山市高明区通洋高科太阳能有限公司 太阳能热水器的光能集热装置及防止其产生雾气的方法
CN101975468A (zh) * 2010-08-13 2011-02-16 佛山市高明区通洋高科太阳能有限公司 太阳能热水器的光能集热装置及消除其上雾气的方法
ITPG20130013A1 (it) * 2013-04-04 2014-10-05 Edn S R L Pannello solare per il riscaldamento di fluidi

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064868A (en) * 1976-10-08 1977-12-27 Halstead Industries, Inc. Solar heat collector
DE3011418A1 (de) * 1980-03-25 1981-10-01 Wiedemann, Martin, 7095 Rainau Vorrichtung zur waermeenergiegewinnung mittels eines mitteltemperatur-strahlungs-luftabsorbers
US4454890A (en) * 1980-08-28 1984-06-19 Actrol Industries Pty. Ltd. Solar heater system and valve
DE29917149U1 (de) * 1999-09-29 2000-01-05 Buderus Heiztechnik Gmbh Solarkollektor
DE20010958U1 (de) * 2000-06-20 2000-09-07 Kreuzer Cornelia Vorrichtung zum Erwärmen von Sonnenkollektor- oder Solarzellenanordnungen
DE102004051689A1 (de) * 2004-10-23 2006-04-27 Rehau Ag + Co. Solarkollektoranlage, Solarkollektor und Verfahren zur Umwandlung von Energie mit einer Solarkollektoranlage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4064868A (en) * 1976-10-08 1977-12-27 Halstead Industries, Inc. Solar heat collector
DE3011418A1 (de) * 1980-03-25 1981-10-01 Wiedemann, Martin, 7095 Rainau Vorrichtung zur waermeenergiegewinnung mittels eines mitteltemperatur-strahlungs-luftabsorbers
US4454890A (en) * 1980-08-28 1984-06-19 Actrol Industries Pty. Ltd. Solar heater system and valve
DE29917149U1 (de) * 1999-09-29 2000-01-05 Buderus Heiztechnik Gmbh Solarkollektor
DE20010958U1 (de) * 2000-06-20 2000-09-07 Kreuzer Cornelia Vorrichtung zum Erwärmen von Sonnenkollektor- oder Solarzellenanordnungen
DE102004051689A1 (de) * 2004-10-23 2006-04-27 Rehau Ag + Co. Solarkollektoranlage, Solarkollektor und Verfahren zur Umwandlung von Energie mit einer Solarkollektoranlage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101975454A (zh) * 2010-08-13 2011-02-16 佛山市高明区通洋高科太阳能有限公司 一种太阳能热水器的循环加热装置及其循环加热方法
CN101975467A (zh) * 2010-08-13 2011-02-16 佛山市高明区通洋高科太阳能有限公司 太阳能热水器的光能集热装置及防止其产生雾气的方法
CN101975468A (zh) * 2010-08-13 2011-02-16 佛山市高明区通洋高科太阳能有限公司 太阳能热水器的光能集热装置及消除其上雾气的方法
ITPG20130013A1 (it) * 2013-04-04 2014-10-05 Edn S R L Pannello solare per il riscaldamento di fluidi

Also Published As

Publication number Publication date
WO2009013578A3 (fr) 2009-11-05
ITMI20071465A1 (it) 2009-01-21

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