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WO2011063810A2 - Amélioration d'un panneau solaire - Google Patents

Amélioration d'un panneau solaire Download PDF

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Publication number
WO2011063810A2
WO2011063810A2 PCT/DK2010/000155 DK2010000155W WO2011063810A2 WO 2011063810 A2 WO2011063810 A2 WO 2011063810A2 DK 2010000155 W DK2010000155 W DK 2010000155W WO 2011063810 A2 WO2011063810 A2 WO 2011063810A2
Authority
WO
WIPO (PCT)
Prior art keywords
fan
collector panel
solar collector
impeller
air
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/DK2010/000155
Other languages
English (en)
Other versions
WO2011063810A3 (fr
Inventor
Hans Jørgen CHRISTENSEN
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
Priority to EP10785325A priority Critical patent/EP2504635A2/fr
Publication of WO2011063810A2 publication Critical patent/WO2011063810A2/fr
Publication of WO2011063810A3 publication Critical patent/WO2011063810A3/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
    • F24S10/00—Solar heat collectors using working fluids
    • F24S10/50—Solar heat collectors using working fluids the working fluids being conveyed between plates
    • 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
    • F24S10/80—Solar heat collectors using working fluids comprising porous material or permeable masses directly contacting the working fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S70/00—Details of absorbing elements
    • 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
    • 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
    • F24S2080/03—Arrangements for heat transfer optimization
    • F24S2080/05—Flow guiding means; Inserts inside conduits
    • 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 relates to a solar collector panel comprising an axial fan, an axial fan and use of an axial fan in a solar collector panel.
  • the present invention relates to a solar collector panel configured for collecting thermal energy by heating of air, said solar collector comprising an axial fan, which fan comprises an electrically driven impeller, wherein the fan during operation is arranged to transport air heated within a volume of the collector panel, away from the collector panel, through an air outlet extending to the exterior of the solar collector panel, and wherein said fan comprises one or more flow straightening members arranged at the suction side of the fan acting on the flow of air through the fan during operation of the fan.
  • an axial fan impeller When an axial fan impeller is operating, it develops a pressure resulting in the generation of an axial flow of air through the fan and possibly an increase in static pressure over the fan.
  • the impeller also causes a rotation or swirl of the air flow after it has passed the fan, i.e. at the pressure side of the fan, as well as a rotation of the air in front of the impeller.
  • This swirl requires an amount of power to be generated and is of no advantage to the operation of the fan.
  • the use of flow straighteners downstream of the fan are known in the art for stopping the swirl and thus increasing the pressure generation of the fan.
  • the impeller will preferably be situated close to the internal volume of the panel and the impeller would without the presence of the flow straightening members induce a rotation in the air inside the volume, causing a disadvantageous mixing of warmer and colder air inside the volume. Due to the introduction of the flow straightening members, the mixing inside the volume is efficiently prevented and the swirl of the flow in front of the impeller and consequently also after the impeller will be reduced and the power fed to the fan is to a higher extend utilised to drive the axial flow through the impeller.
  • said one or more flow straightening members comprises one or more flat members extending substantially perpendicular to the rotor plane of the impeller of the fan.
  • said one or more flow straightening members extends at least partly into said volume of said collector panel.
  • the fan can minimize the consumption of space in depth of the collector panel whereby the collector panel may be constructed with a smaller thickness.
  • the fan comprises at least two flow straightening members arranged substantially parallel to each other.
  • the fan may comprise one, three, four or even more flow straightening members.
  • the flow straightening members may in other aspects of the invention be arranged in an angle to each other, e.g. to form a cross or the like.
  • the one or more flow straightening members have preferably an extent in the direction away from the rotor plane of the impeller of within the range of 0.08 to 0.5 times the impeller diameter, preferably within the range of 0.16 to 0.32 times the impeller diameter.
  • the extend of the flow straightening members is defined as being within the range of 1 to 6 centimetres away from the rotor plane of the impeller, preferably within the range of 2 to 4 centimetres.
  • the distance between the one or more flow straightening members and the impeller is preferably less that 10 millimetres, more preferred less than 5 millimetres. In an example according to the invention shown below is the distance as low as 1 millimetre.
  • the distance between the front of the impeller on the suction side of the fan and the internal volume of the solar collector panel is less than 20 millimetres, preferably less that 10 millimetres, and most preferred less than 5 millimetres. In an example according to the invention shown below is the distance as low as 1 millimetre.
  • the fan takes up very little space in the depth of the solar collector panel for which reason it may be designed with a smaller thickness.
  • the collector panel comprises a solar cell arranged to supply electrical power to an electric motor of the fan for driving said impeller.
  • the solar cell is arranged inside the mentioned volume of the collector panel, but in other aspects of the invention, the solar cell may be arranged away from the collector panel.
  • the solar cell makes the collector panel self sufficient with power thereby facilitating advantageous and easy installation at locations remote to fixed electric power installations for driving the impeller. It is furthermore advantageous that the relationship between the rated power of the fan and the surface area of heat absorber means of the collector panel for heating of air inside the volume is within the range of 1 to 8 W per m 2 surface area, preferably within the range of 2 to 5 W per m 2 . .
  • the rated power of the motor of the fan is in most cases less than 10 W, preferably less than 8W.
  • the thickness of said solar collector is less than 8 cm, preferably less than 6 cm.
  • the thickness of the collector panel is about 5.5 cm, which is made possible by application of the present invention which counteracts the increase in pressure loss caused by the narrower space, i.e. the internal volume, where the air is forced flow by means of the fan. A significant part of this reduction in thickness from to almost half the thickness of known collector panels is made possible by introducing the flow straightening members.
  • the invention furthermore relates to the use of an axial fan in a solar collector panel configured for collecting thermal energy by heating of air, wherein said fan comprises one or more flow straightening members at the suction side of the fan acting on the flow of air through the fan during operation of the fan.
  • the invention relates to a an axial fan comprising an electric motor configured for driving an electrically driven impeller, wherein said fan comprises one or more flow straightening members acting on the flow of air through the fan during operation of the fan , and wherein the one or more flow straightening members are arranged at the suction side of the fan.
  • fig. 1 illustrates a schematic example of a solar collector panel according to the invention
  • fig. 2 illustrates an example of the fan of the solar collector panel according to the invention, seen in perspective
  • fig. 3 illustrates a schematic example of the fan of the solar collector panel according to the invention.
  • Fig. 1 illustrates a solar collector panel 2 according to the invention.
  • the solar collector panel 2 may also for the purpose of this invention be referred to as collector panel 2.
  • the collector panel 2 comprises a transparent or translucent front panel 10 and heat absorber means 1 1 extending between and spaced from the front panel 3 so as to form a volume 12 between the front panel 10 and the heat absorber means 1 1.
  • the heat absorber means 1 1 are preferably permeable to air to act as an air inlet as illustrated.
  • the heat absorber means 1 1 are e.g. made from a heat absorber panel comprising a screen of black felt, and a back panel made from a similar perforated aluminium sheet (not illustrated) that is left with a blank side facing the heat absorber means 1 1.
  • the heat absorber panel is made from a perforated aluminium sheet of e.g. 0.7 millimetres of thickness, which is painted black or anodised on both sides.
  • the heat absorber panel and the back panel are arranged in parallel with a mutual distance so as to provide a thermal insulation of the heat absorber panel as long as the fan 1 drives a flow from the back side of the back panel through the space between the back panel and the heat absorber panel and out through the heat absorber panel and into the volume 12.
  • the solar collector panel 2 furthermore comprises a fan 1 which during operation generates a flow of air.
  • This flow facilitates that air enters the volume 12 from the air inlet (in this case the air permable heat absorber means 1 1), and is heated by the heat absorber means 1 1, is transported away from the volume 12 of the collector panel 2 through an air outlet 9 of the collector panel 2 to a destination location.
  • the fan 1 is an axial fan 1 and comprises an electric motor 4 for driving the impeller 3 of the fan 1 so that the fan 1 can create a flow of air from the volume 12 of the collector panel 1, through the air outlet 9.
  • the fan 1 comprises an electric motor 4 which is supplied with electric power by means of one or more solar cells 5 preferably arranged inside the volume 12 to collect energy from the sun, thereby facilitating a collector panel 2 which is self sufficient with electric power.
  • the impeller diameter of the fan 1 is in the present example 125 millimetres.
  • the rated power of the electric motor of the fan is about 7 W for a 3 m 2 collector panel 2.
  • the power consumption of the fan 1 may be dimensioned by a W/m relationship between the rated power of the motor 4 and the area of the heat absorber means 1 1.
  • the fan 1 may be dimensioned by means of a m 3 /h relationship.
  • the capacity of movement of air per hour for the fan is selected dependent of the area of the heat absorber means 1 1 and/or the volume in m 3 of the volume 12.
  • An example of a W/m 2 of the present example may be 2-5 W/m 2 such as 4 W/m 2 .
  • the fan 1 comprises one or more flow straightening members 6 which during operation of the solar collector panel 2 straightens the flow of air created by the fan 1 , and which are arranged at the suction side 7 of the fan 1.
  • the flow straightening members 6 comprise two flat members made from thin sheet of aluminium and are arranged so they extend into the volume 12 of the collector panel 2 and in the longitudinal direction substantially parallel to the longitudinal direction of the rectangular solar collector panel 2 and so that the height h of the flat members 6 extends substantially perpendicular to the rotor plane of the impeller 3 of the fan 1.
  • the heated air from the volume 12 that will flow in a direction parallel to the longitudinal extent of the collector panel 2 can enter the suction side 7 of the fan 1 parallel to the rotor plane of the impeller 3, as well as parallel to flow straightening members 6 substantially without being hindered by the members 6.
  • the distance between the impeller 3 and the flow straightening members 6 is about 1 mm.
  • the thickness TH of the collector panel from the front side of the front panel 10 to the back side of the heat absorber means 1 1 is in the present example about 5.5 cm.
  • the air inlet is arranged at the bottom part of the collector panel 2 and the back side of the heat absorber means 1 1 is insulated so as to prevent loss of heat.
  • Other alternative arrangements of the solar collector panel may also be envisaged within the scope of the present invention.
  • Fig. 2 illustrates the fan 1 seen in perspective comprising two flow straightening members 6 arranged parallel to each other at the suction side 7 of the fan 1.
  • the fan 1 comprises a connection part 15 such as a flange connection as illustrated, for connecting the fan 1 to the collector panel 2.
  • the fan 1 comprises a ventilation connection part 17 for connecting the fan 1 to a ventilation system, e.g. a pipe, thereby enabling the fan 1 to transport heated air into a ventilation system to a destination location in a building.
  • the ventilation system may be connected to the ventilation connection part 17 inside the ventilation connection part 17, or at the outer surface of the ventilation connection part 17, if the ventilation connection part 17 extends through the heat absorber means 1 1 (not illustrated in fig. 2).
  • the connecting of the ventilation system and the ventilation connection part 17 may e.g. be performed by means of a hose clip, glue, by means of a friction inducing connection or the like.
  • Fig. 3 illustrates the fan 1 seen from the side, at the ends 16 of the flow straightening members 6.
  • the height h of the flow straightening members 6 is 3 cm in the present embodiment of the invention.
  • the infrared rays from the sun pass the front panel 10 and are absorbed by the heat absorber means 1 1.
  • the sun light also causes the solar cells 5 to produce electrical power that drives the electric motor 4 of the fan 1 and thereby the impeller 3, which rotates and drives an airflow in through the back panel, through the heat absorber means 1 1 and into the internal volume 12 of the collector panel.
  • the airflow is heated by the passage of the heat absorber means 1 1 as well as when the air flows parallel to the heat absorber means towards the fan 1.
  • the fan 1 drives the heated air from the volume 12 and out through the back panel and further into a space to be heated and ventilated.
  • a fan impeller 3 causes apart from the air flow also a rotation of the air flow after it has passed the fan 1, i.e. at the pressure side 8 of the fan 1 , as well as a rotation of the air in front of the impeller 3.
  • This rotation or swirl requires an amount of power to be generated and is of no advantage to the operation of the fan or the solar collector.
  • the impeller 3 is situated at a distance of about 1 mm from the internal volume 12 of the panel 2 and the impeller 2 would without the presence of the flow straightening members 6 induce a rotation in the air inside the volume 12, causing an disadvantageous mixing of warmer and colder air inside the volume 12.
  • the mixing inside the volume 12 is efficiently prevented and the swirl of the flow in front of the impeller 3 and consequently also after the impeller 3 will be reduced and the power fed to the fan 1 from the solar cells 5 is to a higher extend utilised to drive the axial flow through the impeller 3.
  • the overall consequences of the introduction of the flow straightening members 6 are thus that the mixing inside the volume 12 is prevented and that the flow rate of heated air out from the solar collector panel 2 is increased, i.e. that the pressure developed by the fan 1 is increased.
  • Connection part such as a flange for connecting the fan to the collector panel

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente invention concerne un panneau solaire (2) configuré pour capter de l'énergie thermique par chauffage de l'air, ledit capteur solaire comprenant un ventilateur axial (1) comportant une roue actionnée électriquement (3), le ventilateur (1) pendant le fonctionnement étant conçu pour transporter l'air chauffé dans un volume (12) du panneau solaire (2), à distance du panneau solaire (2), à travers une sortie d'air (9) s'étendant vers l'extérieur du panneau solaire (2), et ledit ventilateur (1) comprenant au moins un élément stabilisateur de flux (6) disposé au niveau du côté d'aspiration (7) du ventilateur (1) agissant sur le flux d'air à travers le ventilateur (1) pendant le fonctionnement du ventilateur (1).
PCT/DK2010/000155 2009-11-24 2010-11-24 Amélioration d'un panneau solaire Ceased WO2011063810A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10785325A EP2504635A2 (fr) 2009-11-24 2010-11-24 Amélioration d'un panneau solaire

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200901238 2009-11-24
DKPA200901238A DK177472B1 (en) 2009-11-24 2009-11-24 Improvement of a solar collector panel

Publications (2)

Publication Number Publication Date
WO2011063810A2 true WO2011063810A2 (fr) 2011-06-03
WO2011063810A3 WO2011063810A3 (fr) 2011-12-22

Family

ID=44066975

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK2010/000155 Ceased WO2011063810A2 (fr) 2009-11-24 2010-11-24 Amélioration d'un panneau solaire

Country Status (3)

Country Link
EP (1) EP2504635A2 (fr)
DK (1) DK177472B1 (fr)
WO (1) WO2011063810A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014169922A1 (fr) * 2013-04-16 2014-10-23 Udlejer Hans Jørgen Christensen Capteur solaire à air
WO2016026497A1 (fr) * 2014-08-18 2016-02-25 Udlejer Hans Jørgen Christensen Panneau de collecteur solaire et procédé d'exploitation d'un panneau de collecteur solaire

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003048655A1 (fr) 2001-12-01 2003-06-12 Christensen Hans Joergen Panneau solaire pour le chauffage d'air de ventilation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006102891A2 (fr) * 2005-03-29 2006-10-05 Christensen Hans Joergen Panneau solaire
US20090194095A1 (en) * 2008-01-18 2009-08-06 Joel Fairstein Solar air-heating system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003048655A1 (fr) 2001-12-01 2003-06-12 Christensen Hans Joergen Panneau solaire pour le chauffage d'air de ventilation

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014169922A1 (fr) * 2013-04-16 2014-10-23 Udlejer Hans Jørgen Christensen Capteur solaire à air
WO2016026497A1 (fr) * 2014-08-18 2016-02-25 Udlejer Hans Jørgen Christensen Panneau de collecteur solaire et procédé d'exploitation d'un panneau de collecteur solaire
EA031966B1 (ru) * 2014-08-18 2019-03-29 Удлайер Ханс Йерген Кристенсен Панель солнечного коллектора и способ использования панели солнечного коллектора

Also Published As

Publication number Publication date
EP2504635A2 (fr) 2012-10-03
DK177472B1 (en) 2013-06-24
WO2011063810A3 (fr) 2011-12-22
DK200901238A (en) 2011-05-25

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