WO2009149751A1 - Evacuated solar panel with a non evaporable getter pump - Google Patents

Evacuated solar panel with a non evaporable getter pump Download PDF

Info

Publication number
WO2009149751A1
WO2009149751A1 PCT/EP2008/057281 EP2008057281W WO2009149751A1 WO 2009149751 A1 WO2009149751 A1 WO 2009149751A1 EP 2008057281 W EP2008057281 W EP 2008057281W WO 2009149751 A1 WO2009149751 A1 WO 2009149751A1
Authority
WO
WIPO (PCT)
Prior art keywords
solar panel
envelope
evacuated solar
getter pump
absorber
Prior art date
Application number
PCT/EP2008/057281
Other languages
French (fr)
Inventor
Cristoforo Benvenuti
Original Assignee
R&B Energy Research Sarl
European Organization For Nuclear Research Cern
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
Priority to EP08774066.8A priority Critical patent/EP2310763B1/en
Priority to PCT/EP2008/057281 priority patent/WO2009149751A1/en
Priority to BRPI0822892A priority patent/BRPI0822892A2/en
Priority to CN2008801297554A priority patent/CN102057233B/en
Application filed by R&B Energy Research Sarl, European Organization For Nuclear Research Cern filed Critical R&B Energy Research Sarl
Priority to CA2727194A priority patent/CA2727194C/en
Priority to AU2008357546A priority patent/AU2008357546B2/en
Priority to JP2011512832A priority patent/JP5400144B2/en
Priority to KR1020117000607A priority patent/KR101512625B1/en
Priority to US12/996,627 priority patent/US20110155125A1/en
Priority to PT87740668T priority patent/PT2310763T/en
Priority to ES08774066.8T priority patent/ES2616529T3/en
Priority to DK08774066.8T priority patent/DK2310763T3/en
Priority to SI200831768A priority patent/SI2310763T1/en
Publication of WO2009149751A1 publication Critical patent/WO2009149751A1/en
Priority to HRP20170272TT priority patent/HRP20170272T1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • F04B37/02—Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00 for evacuating by absorption or adsorption
    • 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
    • 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
    • F24S40/40—Preventing corrosion; Protecting against dirt or contamination
    • 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
    • F24S40/40—Preventing corrosion; Protecting against dirt or contamination
    • F24S40/46—Maintaining vacuum, e.g. by using getters
    • 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
    • F24S80/50—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings
    • F24S80/54—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings using evacuated 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
    • F24S80/50—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings
    • F24S80/58—Elements for transmitting incoming solar rays and preventing outgoing heat radiation; Transparent coverings characterised by their mountings or fixing means
    • 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 relates to an evacuated solar panel with a Getter pump, in particular according to the invention the getter pump is a Non-Evaporable Getter (NEG) pump .
  • NEG Non-Evaporable Getter
  • NEG pumps are widely used to maintain the vacuum inside sealed evacuated devices.
  • the gas molecules are adsorbed on the surface of the getter material, resulting in NEG saturation .
  • NEG To avoid saturation by the pumped gases and, thus, loss of the pumping effect (i.e. capability of adsorbing gases molecules) NEG must be heated to help the adsorbed gases molecules to diffuse from the surface of the getter pump within the volume of the same.
  • Heating may be applied continuously or intermittently for instance by means of electric heating.
  • the technical aim of the present invention is therefore to provide an evacuated solar panel with a NEG pump by which the said problems of the known art are eliminated.
  • an object of the invention is to provide a solar panel which is cheap when compared to the solar panels of the known art.
  • Another object of the invention is to provide a solar panel which is very reliable.
  • Figure 1 is a schematic view of a portion of a solar panel having a getter pump according to the invention
  • Figure 2 is a prospective view of a getter pump of the solar panel according to the invention
  • Figure 3 show a different embodiment of the solar panel with a getter pump according to the invention
  • Figure 4 schematically shows a solar panel having the getter pump of the invention.
  • the solar panel 1 comprises a frame 2 which generally carries a plurality of spacers 3 carrying an upper transparent glass wall 4 and a back lower wall 2a made of a metal or of a glass sheet.
  • the frame 2 with the transparent wall 4 and the back wall 2a defines a closed chamber 6 containing the spacers 3 and an absorber 8.
  • the adsorber 8 comprises one or more adsorbing panels 10 and one or more cooling pipes 11 connected thereto.
  • the chamber 6 also contains a NEG pump 15 which advantageously comprises an envelope having outer selectively blackened surfaces 16 and including therein one or more non-evaporable getter elements.
  • the envelope has a box-like shape and has preferably one through opening 18 for keeping the inner volume of the box-like envelope in contact with the outside (i.e. with the chamber 6) of the box-like envelope.
  • the envelope is thermally independent of the solar panel (figure 1) .
  • the envelope is provided with thermally insulating connecting elements 20 to the absorber (i.e. to the adsorbing panel 10) or to the frame 2 or to the spacers 3 of the solar panel 1.
  • thermally insulating connecting elements 20 comprise metal springs or wires.
  • the absorbing panel 10 defines a cavity 22 wherein the envelope is inserted.
  • the envelope is thermally in contact with the absorber (figure 3) .
  • the absorbing plate 10 of said absorber 8 defines at least one wall 25 of the envelope which contains the NEG elements, an opposite wall 26 of this envelope being defined by a plate connected mechanically or welded to the absorbing panel.
  • This configuration may be advantageously used when the operating absorber temperature exceeds 180 0 C, nevertheless it may also be adopted for lower operating temperatures, provided that the circulation of the cooling fluid be intermittently stopped so as to let the absorber temperature increase to higher values (to regenerate the getter pump) . This operating mode may turn out to be very helpful if existing panels must be adapted for a different use .
  • the solar panel of the invention comprises a control system arranged for intermittently stopping the circulation of the cooling fluid within the cooling pipe.
  • the embodiment above described is provided with two transparent walls, i.e. the transparent wall 4 and the back wall 2a whenever preferably used in connection with reflecting mirrors.
  • a different embodiment may have the transparent back wall 2a replaced by a metal wall.

Abstract

The evacuated solar panel (1) comprises a frame (2) containing a plurality of spacers (3) carrying a transparent wall (4). The transparent wall (4) with the frame (2) defines a closed chamber (6) containing the spacers (3), the light absorber (8) and a getter pump (15). The getter pump (15) comprises an envelope having selectively blackened outer surfaces (16) and including one or more non-evaporable getter NEG elements.

Description

EVACUATED SOLAR PANEL WITH A NON EVAPORABLE GETTER PUMP
The present invention relates to an evacuated solar panel with a Getter pump, in particular according to the invention the getter pump is a Non-Evaporable Getter (NEG) pump .
As known in the art, NEG pumps are widely used to maintain the vacuum inside sealed evacuated devices.
In the NEG pumps the gas molecules are adsorbed on the surface of the getter material, resulting in NEG saturation .
To avoid saturation by the pumped gases and, thus, loss of the pumping effect (i.e. capability of adsorbing gases molecules) NEG must be heated to help the adsorbed gases molecules to diffuse from the surface of the getter pump within the volume of the same.
Heating may be applied continuously or intermittently for instance by means of electric heating.
Nevertheless such electric heaters require electric vacuum feedthroughs, which add costs to the device and reduce its reliability.
The technical aim of the present invention is therefore to provide an evacuated solar panel with a NEG pump by which the said problems of the known art are eliminated. Within the scope of this technical aim, an object of the invention is to provide a solar panel which is cheap when compared to the solar panels of the known art.
Another object of the invention is to provide a solar panel which is very reliable.
The technical aim, together with these and further objects, are attained according to the invention by providing an evacuated solar panel with a NEG pump in accordance with the accompanying claims. Advantageously, in case of solar panels solar heating is freely available and the non evaporable getter pump is contained in a volume enclosed by selectively blackened walls, so as to effectively absorb the solar light and reach the temperature required for gas diffusion. This temperature varies for different NEG pumps and operating pressures, but in all cases it should not be lower than about 1800C.
Further characteristics and advantages of the invention will be more apparent from the description of a preferred but non-exclusive embodiment of the evacuated solar panel with a getter pump according to the invention, illustrated by way of non-limiting example in the accompanying drawings, in which:
Figure 1 is a schematic view of a portion of a solar panel having a getter pump according to the invention; Figure 2 is a prospective view of a getter pump of the solar panel according to the invention;
Figure 3 show a different embodiment of the solar panel with a getter pump according to the invention; and Figure 4 schematically shows a solar panel having the getter pump of the invention.
With reference to the figures, these show an evacuated solar panel generally indicated by the numeral reference 1.
The solar panel 1 comprises a frame 2 which generally carries a plurality of spacers 3 carrying an upper transparent glass wall 4 and a back lower wall 2a made of a metal or of a glass sheet.
The frame 2 with the transparent wall 4 and the back wall 2a defines a closed chamber 6 containing the spacers 3 and an absorber 8.
As known in the art the adsorber 8 comprises one or more adsorbing panels 10 and one or more cooling pipes 11 connected thereto.
The chamber 6 also contains a NEG pump 15 which advantageously comprises an envelope having outer selectively blackened surfaces 16 and including therein one or more non-evaporable getter elements.
The envelope has a box-like shape and has preferably one through opening 18 for keeping the inner volume of the box-like envelope in contact with the outside (i.e. with the chamber 6) of the box-like envelope.
Different opening geometries could also be envisaged.
In a first embodiment, the envelope is thermally independent of the solar panel (figure 1) . In this respect the envelope is provided with thermally insulating connecting elements 20 to the absorber (i.e. to the adsorbing panel 10) or to the frame 2 or to the spacers 3 of the solar panel 1.
Thus the non-evaporable getter pump is suspended via springs to minimize the thermal conduction to the anchoring points, which could then be warm (adsorber) or cold (panel frame or spacers) so as to largely exceed 1800C in good insolation conditions, no matter what panel operating temperature is chosen. These thermally insulating connecting elements 20 comprise metal springs or wires.
In particular, the absorbing panel 10 defines a cavity 22 wherein the envelope is inserted.
In a second embodiment the envelope is thermally in contact with the absorber (figure 3) .
In this respect the absorbing plate 10 of said absorber 8 defines at least one wall 25 of the envelope which contains the NEG elements, an opposite wall 26 of this envelope being defined by a plate connected mechanically or welded to the absorbing panel. This configuration may be advantageously used when the operating absorber temperature exceeds 1800C, nevertheless it may also be adopted for lower operating temperatures, provided that the circulation of the cooling fluid be intermittently stopped so as to let the absorber temperature increase to higher values (to regenerate the getter pump) . This operating mode may turn out to be very helpful if existing panels must be adapted for a different use . In this respect the solar panel of the invention comprises a control system arranged for intermittently stopping the circulation of the cooling fluid within the cooling pipe.
Advantageously both non-evaporable getter pumping speed and the gas load increase in phase with the increase of the incident solar power.
The embodiment above described is provided with two transparent walls, i.e. the transparent wall 4 and the back wall 2a whenever preferably used in connection with reflecting mirrors.
A different embodiment (to be used without such reflecting mirrors) may have the transparent back wall 2a replaced by a metal wall.
The solar panel with a getter pump conceived in this manner is susceptible to numerous modifications and variants, all falling within the scope of the inventive concept; moreover all details can be replaced by technically equivalent elements.
In practice the materials used and the dimensions can be chosen at will according to the requirements and to the state of the art.

Claims

1. Evacuated solar panel with a getter pump, said evacuated solar panel comprising a frame carrying a plurality of spacers carrying at least a transparent wall, said transparent wall defining with said frame a closed chamber containing said spacers and an absorber and a getter pump, characterised in that said getter pump comprises an envelope having outer selectively blackened surfaces and including one or more NEG elements.
2. Evacuated solar panel as claimed in claim 1, characterised in that said envelope has a box-like shape and has at least one through opening for keeping the inner volume of the box-like envelope in contact with the outside of the box-like envelope.
3. Evacuated solar panel as claimed in any of the preceding claims, characterised in that said envelope is thermally independent of the solar panel.
4. Evacuated solar panel as claimed in the preceding claim, characterised in that said envelope is provided with thermally insulating connecting elements to the absorber or to the frame or to the spacers of the solar panel.
5. Evacuated solar panel as claimed in any of the preceding claims, characterised in that said thermally insulating connecting elements comprise springs .
6. Evacuated solar panel as claimed in any of the preceding claims, characterised in that said absorber comprises one or more absorbing panels and one or more cooling pipes connected thereto, the absorbing panel defining a cavity where said envelope is inserted.
7. Evacuated solar panel as claimed in any of the preceding claims, characterised in that said envelope is thermally in contact with the absorber.
8. Evacuated solar panel as claimed in any of the preceding claims, characterised in that an absorbing plate of said absorber defines at least one wall of said envelope which contains the NEG elements, an opposite wall of said envelope being defined by a plate connected to the absorbing panel.
9. Evacuated solar panel as claimed in any of the preceding claims, characterised by further comprising a control system arranged for intermittently stopping the circulation of the cooling fluid within the cooling pipe.
PCT/EP2008/057281 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump WO2009149751A1 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
AU2008357546A AU2008357546B2 (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump
BRPI0822892A BRPI0822892A2 (en) 2008-06-11 2008-06-11 solar panel evacuated with a non-evaporable absorption pump
CN2008801297554A CN102057233B (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump
KR1020117000607A KR101512625B1 (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump
CA2727194A CA2727194C (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump
PCT/EP2008/057281 WO2009149751A1 (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump
JP2011512832A JP5400144B2 (en) 2008-06-11 2008-06-11 Vacuum solar panel with non-evaporable getter pump
EP08774066.8A EP2310763B1 (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump
US12/996,627 US20110155125A1 (en) 2008-06-11 2008-06-11 Evecuated solar panel with a non evaporable getter pump
PT87740668T PT2310763T (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump
ES08774066.8T ES2616529T3 (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non-evaporable adsorption pump
DK08774066.8T DK2310763T3 (en) 2008-06-11 2008-06-11 EMPTY SOLAR PANEL WITH A NON-EVAPORABLE GETTER PUMP
SI200831768A SI2310763T1 (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump
HRP20170272TT HRP20170272T1 (en) 2008-06-11 2017-02-20 Evacuated solar panel with a non evaporable getter pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2008/057281 WO2009149751A1 (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump

Publications (1)

Publication Number Publication Date
WO2009149751A1 true WO2009149751A1 (en) 2009-12-17

Family

ID=40419466

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/057281 WO2009149751A1 (en) 2008-06-11 2008-06-11 Evacuated solar panel with a non evaporable getter pump

Country Status (14)

Country Link
US (1) US20110155125A1 (en)
EP (1) EP2310763B1 (en)
JP (1) JP5400144B2 (en)
KR (1) KR101512625B1 (en)
CN (1) CN102057233B (en)
AU (1) AU2008357546B2 (en)
BR (1) BRPI0822892A2 (en)
CA (1) CA2727194C (en)
DK (1) DK2310763T3 (en)
ES (1) ES2616529T3 (en)
HR (1) HRP20170272T1 (en)
PT (1) PT2310763T (en)
SI (1) SI2310763T1 (en)
WO (1) WO2009149751A1 (en)

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FR2977008A1 (en) * 2011-06-22 2012-12-28 Saint Gobain Vacuum solar collector for absorbing solar heat from radiation to heat water in domestic applications, has solar radiation absorber designed as sheet and kept in contact with pipes, where gas traps are arranged between pipes and main wall
EP2551609A1 (en) 2011-07-27 2013-01-30 TVP Solar S.A. Vacuum solar thermal panel with non-evaporable getter pump assembly

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EP2472194B1 (en) * 2010-12-28 2013-02-13 TVP Solar S.A. Method for performing an exhaust cycle of a vacuum solar thermal panel
CN104763614B (en) * 2015-04-10 2017-02-01 成都国光电气股份有限公司 Magnetic steel protection piece for vacuum titanium pump

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Publication number Priority date Publication date Assignee Title
FR2492956A1 (en) * 1980-10-29 1982-04-30 Landex Ets Large-evacuated solar heat collector panel - formed by flat box with glass surfaces and contg. finned tube coated with heat absorbing substance such as black chromium
JPH03145580A (en) * 1989-10-30 1991-06-20 Shimadzu Corp Getter pump
EP0633420A2 (en) * 1993-07-08 1995-01-11 Saes Getters S.P.A. Thermally insulating jacket under reversible vacuum
JPH09204994A (en) * 1996-01-26 1997-08-05 Ishikawajima Harima Heavy Ind Co Ltd Vacuum chamber with built-in pump for particle accelerator
JP2004108747A (en) * 2002-09-13 2004-04-08 Kokusai Gijutsu Kaihatsu Co Ltd Flat plate solar heat collecting device and solar heat collecting system
WO2005075900A1 (en) * 2004-01-22 2005-08-18 European Organisation For Nuclear Research - Cern Evacuable flat panel solar collector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2977008A1 (en) * 2011-06-22 2012-12-28 Saint Gobain Vacuum solar collector for absorbing solar heat from radiation to heat water in domestic applications, has solar radiation absorber designed as sheet and kept in contact with pipes, where gas traps are arranged between pipes and main wall
EP2551609A1 (en) 2011-07-27 2013-01-30 TVP Solar S.A. Vacuum solar thermal panel with non-evaporable getter pump assembly
US9182147B2 (en) 2011-07-27 2015-11-10 Tvp Solar Sa Vacuum solar thermal panel with non-evaporable getter pump assembly

Also Published As

Publication number Publication date
CA2727194C (en) 2015-08-11
KR20110030551A (en) 2011-03-23
SI2310763T1 (en) 2017-03-31
BRPI0822892A2 (en) 2019-09-24
PT2310763T (en) 2017-03-01
CA2727194A1 (en) 2009-12-17
US20110155125A1 (en) 2011-06-30
KR101512625B1 (en) 2015-04-16
DK2310763T3 (en) 2017-03-06
ES2616529T8 (en) 2017-07-03
CN102057233A (en) 2011-05-11
AU2008357546A1 (en) 2009-12-17
JP2011523220A (en) 2011-08-04
EP2310763B1 (en) 2016-11-23
HRP20170272T1 (en) 2017-05-05
JP5400144B2 (en) 2014-01-29
ES2616529T3 (en) 2017-06-13
EP2310763A1 (en) 2011-04-20
CN102057233B (en) 2012-10-03
AU2008357546B2 (en) 2014-02-06

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