US20130025585A1 - Getter system for hydrogen sensitive devices - Google Patents

Getter system for hydrogen sensitive devices Download PDF

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Publication number
US20130025585A1
US20130025585A1 US13/637,965 US201113637965A US2013025585A1 US 20130025585 A1 US20130025585 A1 US 20130025585A1 US 201113637965 A US201113637965 A US 201113637965A US 2013025585 A1 US2013025585 A1 US 2013025585A1
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United States
Prior art keywords
getter
hydrogen
getter system
material powders
sensitive device
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Abandoned
Application number
US13/637,965
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English (en)
Inventor
Andrea Conte
Luca Viale
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SAES Getters SpA
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Assigned to SAES GETTERS S.P.A. reassignment SAES GETTERS S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CONTE, ANDREA, VIALE, LUCA
Assigned to SAES GETTERS S.P.A. reassignment SAES GETTERS S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CONTE, ANDREA, VIALE, LUCA
Publication of US20130025585A1 publication Critical patent/US20130025585A1/en
Abandoned legal-status Critical Current

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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
    • F04B37/04—Selection of specific absorption or adsorption materials
    • 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
    • F24S40/40—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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
    • F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
    • F28D15/0258—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with means to remove contaminants, e.g. getters
    • 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 improved solutions for integrating hydrogen getter in powder form within hydrogen sensitive devices, and hydrogen sensitive devices employing such improved solutions.
  • sensitive devices With the definition of sensitive devices to the presence of hydrogen or “hydrogen sensitive devices” it is intended devices whose performances or characteristics are degraded by the presence of a certain level of hydrogen, that typically should be less than 10 ⁇ 1 Pa. This pressure value is in any case depending on the type of device and its configuration, and for the least sensitive devices can be up to 1 Pa or higher.
  • One of the most interesting hydrogen sensitive devices category where the present invention finds a useful application is that of receiving tubes for solar collectors.
  • getter alloys and of shielding solutions are sufficient for meeting the current requirements in the field of the receiving tubes for solar collectors, but not for assuring the fulfilment of the demands from the new generation of receivers, both in terms of working temperature, which is foreseen that could be higher than 500° C., and in terms of hydrogen capacity of the getter alloy inside the receiving tube of the collector which, in the absence of effective shielding solutions, can be at a temperature very close to the working temperature of the tube.
  • the embrittlement typically starts when the getter alloy has absorbed about 2500 Pa l/g, while the most significant detrimental effects are observed upon an absorption of about 5000 Pa l/g.
  • Another problem of using the getter material in consolidated form is that its absorption speed is reduced with respect to its use in powder form, since in the first case the total active getter surface area is significantly less readily available.
  • Aim of the present invention is to provide a solution able to overcome the drawbacks present in the prior art and enabling the use of getter materials in powder forms within hydrogen sensitive devices.
  • the invention consists in a hydrogen getter system comprising a metallic mesh with closed extremities containing getter material powders, characterized in that:
  • such ratio between the smallest dimension of the getter material powders and the mesh size is at least 3.
  • FIG. 1 represents a first embodiment of a getter system according to the present invention
  • FIG. 2A represents a getter system according to a second alternative embodiment of the invention and FIG. 2B shows its positioning within a sensitive device;
  • FIG. 3A represents a getter system according to a third alternative embodiment, with FIG. 3B showing its positioning within a sensitive device.
  • mesh size it is intended the dimension of the openings of the net whose purpose is the getter powders retaining and that allows an easy access to H 2 for an efficient and fast removal from the internal environment of the sensitive device.
  • Such metallic meshes are characterized by a typical number, that is the number of wires per unit of length (the inch being typically used as unit of length) whereby with a 140 mesh is intended a mesh having 140 wires in one inch.
  • the powders typically are not spherical and what it is relevant for the present invention is the smallest dimension of the particle, since this is the critical parameter with regard to their retention by the metallic mesh acting as a net, as well as the parameter defining the result of the sieving operations used for the selection of powder particle size.
  • the particle size of the powders is typically selected by means of two sieving operations after grinding of the getter alloy.
  • the particles that have larger dimension are discarded; those are the ones that do not pass through a first sieve with opening S1. This selects all the particles having a sieving diameter below S1. Choosing particles having dimensions below a certain limit S1 guarantees that each getter particle has a sufficiently high surface to volume ratio, i.e. a free surface available for the quick H 2 sorption.
  • these powders are subjected to a second sieving operation using a sieve with opening S2 ( ⁇ S1), where in this case all the fraction passing through the sieve is discarded. So these operations provide powders having a sieving diameter comprised between S1 and S2.
  • the correct dimensioning, or, to be more precise, the correct coupling between the metallic mesh of the getter device and the size of the getter powders therein contained is essential for the successful employ of the getter material in powder form within the sensitive device, with particular reference to receiving tubes for solar collectors.
  • the sorption speed of the getter material is one of the factor influencing the overall sorption speed of the getter system, keeping into account the impact on such fundamental parameter given by the retaining mesh/net of the getter system itself.
  • the getter devices according to the present invention are typically manufactured starting from a rectangular metallic mesh that is overlapped on its shortest side and soldered or locally welded.
  • the extremities of the net need to be closed separately, and such operation may be done through soldering or a localized welding of the end portion of the mesh or through suitable plug crimping of said portion.
  • the filling with the getter material powders is typically made after the cylinder is formed, before the final closing of the end portion of the mesh.
  • a rolled mesh typically spans from 100 to 500 mm in length and has a diameter comprised between 5 and 25 mm.
  • the two ends of the metallic mesh once closed, are coupled together via coupling means to give the getter system an annular configuration.
  • a resilient means such as a spring is provided and joined to the other end.
  • the coupling of the ends may also be made by coupling means running alongside or inside the metallic mesh of the getter system.
  • FIG. 1 shows a getter system 10 according to the present inventions, formed by a metallic mesh 11 containing a getter material in form of powders (not shown). Both ends of the mesh are closed by plugs 12 , 12 ′, that are coupled together by a spring 13 .
  • the annular configuration of the getter system allows to easily mount it within sensitive devices of cylindrical geometry, such in the case of receiving tubes.
  • the getter device is placed on the outer surface of the inner tube.
  • FIGS. 2A and 2B This type of solution is schematically represented in FIGS. 2A and 2B .
  • a getter system 21 is shown, with an elastic, superelastic or shape memory wire or strip 22 running alongside the mesh and having the coupling function between the extremities of the getter system.
  • the wire is in the internal part of the mesh.
  • FIG. 2B shows the getter system installed within a receiving tube for solar collector 20 , simply depicted showing two of its main constituents, the internal tube 23 where the oil (not shown) flows, and the external tube 24 that constitutes the case of the receiving tube.
  • the getter device is compressed to reduce the radius, and released after having placed it on the sensitive device component.
  • FIGS. 3A and 3B This type of solution is schematically represented in FIGS. 3A and 3B .
  • a getter system 31 is shown, with an elastic, superelastic or shape memory wire or strip 32 running alongside the mesh.
  • the wire is in the internal part of the mesh and has the coupling function between the extremities of the getter system, meaning that the wire and its displacement influences the reciprocal position of the extremities.
  • FIG. 3B shows the getter system installed within a receiving tube for solar collector 30 , also in this case schematically represented depicting only two of its main constituents, the internal tube 33 where the oil (not shown) flows, and the external tube 34 that constitutes the case of the receiver.
  • This solution is the preferred one in case of receiving tubes, since it will easily allow for the placing of the getter device on the outer tube of the receiver, that is the portion at the lowest temperature, condition that allows for the most efficient use of the getter for hydrogen removal.
  • the elastic means comprises thermal responsive element or elements, such as shape memory alloy or superelastic elements, and the force exerted solely by the shape transition of the alloy consequent to its heating. It can also be provided a combined system, where for example standard elastic means, such as mechanical springs, are used for a mild anchoring of the getter device on the component, while the shape memory element provides for an extra force firmly holding the getter system in place, when the sensitive device is in use, as a consequence of the rise in temperature during operation.
  • standard elastic means such as mechanical springs
  • Getter material powders useful for the present inventions are for example the ones described in U.S. Pat. No. 3,203,901 (Zr—Al alloys), U.S. Pat. No. 4,306,887 (Zr—Fe alloys), U.S. Pat. No. 5,961,750 (Zr—Co-Rare earths alloy).
  • Zr—Al alloys Zr—Al alloys
  • U.S. Pat. No. 4,306,887 Zr—Fe alloys
  • U.S. Pat. No. 5,961,750 Zr—Co-Rare earths alloy
  • yttrium alloys for hydrogen sorption, particularly at high temperatures, it is also known the use of yttrium alloys, as described in the international patent applications WO 2007/148362 and WO 2007/099575, and in the above mentioned Italian patent application MI2009/A00410.
  • the above mentioned getter alloys are the ones preferably used with the present invention, but any hydrogen getter alloy used in powder form may be employed with
  • the hydrogen sensitive device is a receiver tube for solar collectors
  • the getter system comprises elastic means, such as springs, to enable its fixing by elastic force onto a wall of the receiver.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General 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)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Gas Separation By Absorption (AREA)
  • Powder Metallurgy (AREA)
US13/637,965 2010-04-22 2011-03-28 Getter system for hydrogen sensitive devices Abandoned US20130025585A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10425130A EP2325575A1 (en) 2010-04-22 2010-04-22 Improved getter system for hydrogen sensitve device
EP10425130.1 2010-04-22
PCT/EP2011/054688 WO2011131456A1 (en) 2010-04-22 2011-03-28 Improved getter system for hydrogen sensitive devices

Publications (1)

Publication Number Publication Date
US20130025585A1 true US20130025585A1 (en) 2013-01-31

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US13/637,965 Abandoned US20130025585A1 (en) 2010-04-22 2011-03-28 Getter system for hydrogen sensitive devices

Country Status (6)

Country Link
US (1) US20130025585A1 (https=)
EP (2) EP2325575A1 (https=)
JP (1) JP2013531772A (https=)
CN (1) CN102859291B (https=)
IL (1) IL222502A (https=)
WO (1) WO2011131456A1 (https=)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120211003A1 (en) * 2009-10-27 2012-08-23 Schott Solar Ag Absorber tube and method for the reversible loading and unloading of a getter material
US20140158113A1 (en) * 2011-08-04 2014-06-12 Marco Urbano Solar collectors receiver tubes
US9027546B2 (en) * 2012-02-03 2015-05-12 Saes Getters S.P.A. Improvements for solar collector receiver tubes
US20220251678A1 (en) * 2019-05-22 2022-08-11 Atomic Energy Of Canada Limited/Ènergie Atomique Du Canada Limitèe Portable dehydriding apparatus and method of using same

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2360326B1 (es) * 2009-10-05 2012-03-30 Abengoa Solar New Technologies, S.A. Sistema de afinador de vac�?o o getter no evaporable.
ES2454775B1 (es) * 2012-10-11 2015-03-10 Abengoa Solar New Tech Sa Sistema afinador de vacío en tubo caloportador
US20190178532A1 (en) * 2016-08-05 2019-06-13 Dow Global Technologies Llc Process for increasing the service life of a solar receiver

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4203049A (en) * 1977-06-27 1980-05-13 U.S. Philips Corporation Electric lamp with hydrogen getter and hydrogen getter
US4264280A (en) * 1974-03-12 1981-04-28 S.A.E.S. Getters S.P.A. Water vapor releasing composition of matter and device, and process for their use
US4892142A (en) * 1989-05-05 1990-01-09 Luz Industries Israel, Ltd. Device and method for removing gaseous impurities from a sealed vacuum
US5161955A (en) * 1991-08-20 1992-11-10 Danielson Associates, Inc. High vacuum pump using bulk getter material
US6077046A (en) * 1998-01-20 2000-06-20 Raytheon Company Getter assembly having porous metallic support and its use in a vacuum apparatus
US6838822B2 (en) * 2001-01-22 2005-01-04 Futaba Corporation Electron tube with a ring-less getter
US20070034204A1 (en) * 2005-05-09 2007-02-15 Thomas Kuckelkorn Tubular radiation absorbing device for solar heating applications
US20070102650A1 (en) * 2005-11-10 2007-05-10 Souichi Katagiri Charged particle beam apparatus
WO2010144930A2 (de) * 2009-06-17 2010-12-23 Alvatec Alkali Vacuum Technologies Gmbh Getter und getteranordnung sowie vorrichtung umfassend dieselben und verfahren zur herstellung eines getters
US20110197949A1 (en) * 2010-02-17 2011-08-18 Phillip Gerard Langhorst Solar collector
US20120211003A1 (en) * 2009-10-27 2012-08-23 Schott Solar Ag Absorber tube and method for the reversible loading and unloading of a getter material
US20120251336A1 (en) * 2009-10-05 2012-10-04 Abengoa Solar New Technologies, S.A. Vacuum enhancing system or non-evaporable getter
US20140158113A1 (en) * 2011-08-04 2014-06-12 Marco Urbano Solar collectors receiver tubes

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US3203901A (en) 1962-02-15 1965-08-31 Porta Paolo Della Method of manufacturing zirconiumaluminum alloy getters
US4043387A (en) * 1976-11-26 1977-08-23 Hughes Aircraft Company Water heat pipe with improved compatability
IT1115156B (it) 1979-04-06 1986-02-03 Getters Spa Leghe zr-fe per l'assorbimento di idrogeno a basse temperature
US4586561A (en) * 1984-02-27 1986-05-06 Exxon Research And Engineering Co. Low temperature heat pipe employing a hydrogen getter
IT1290451B1 (it) 1997-04-03 1998-12-03 Getters Spa Leghe getter non evaporabili
JP3828487B2 (ja) * 2002-12-24 2006-10-04 三菱電機株式会社 非蒸発型ゲッター
IL153872A (en) * 2003-01-09 2005-06-19 Solel Solar Systems Ltd Getter support assembly for a solar energy collector system
ITMI20060361A1 (it) 2006-02-28 2007-09-01 Getters Spa Assorbimento di idrogeno mediante l'impiego di leghe getter non evaporabili metodo ed applicazioni
ITMI20061173A1 (it) 2006-06-19 2007-12-20 Getters Spa Leghe getter non evaporabili adatte particolarmente per l'assorbimento di idrogeno

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4264280A (en) * 1974-03-12 1981-04-28 S.A.E.S. Getters S.P.A. Water vapor releasing composition of matter and device, and process for their use
US4203049A (en) * 1977-06-27 1980-05-13 U.S. Philips Corporation Electric lamp with hydrogen getter and hydrogen getter
US4892142A (en) * 1989-05-05 1990-01-09 Luz Industries Israel, Ltd. Device and method for removing gaseous impurities from a sealed vacuum
US5161955A (en) * 1991-08-20 1992-11-10 Danielson Associates, Inc. High vacuum pump using bulk getter material
US6077046A (en) * 1998-01-20 2000-06-20 Raytheon Company Getter assembly having porous metallic support and its use in a vacuum apparatus
US6838822B2 (en) * 2001-01-22 2005-01-04 Futaba Corporation Electron tube with a ring-less getter
US20070034204A1 (en) * 2005-05-09 2007-02-15 Thomas Kuckelkorn Tubular radiation absorbing device for solar heating applications
US20070102650A1 (en) * 2005-11-10 2007-05-10 Souichi Katagiri Charged particle beam apparatus
WO2010144930A2 (de) * 2009-06-17 2010-12-23 Alvatec Alkali Vacuum Technologies Gmbh Getter und getteranordnung sowie vorrichtung umfassend dieselben und verfahren zur herstellung eines getters
US20120251336A1 (en) * 2009-10-05 2012-10-04 Abengoa Solar New Technologies, S.A. Vacuum enhancing system or non-evaporable getter
US20120211003A1 (en) * 2009-10-27 2012-08-23 Schott Solar Ag Absorber tube and method for the reversible loading and unloading of a getter material
US20110197949A1 (en) * 2010-02-17 2011-08-18 Phillip Gerard Langhorst Solar collector
US20140158113A1 (en) * 2011-08-04 2014-06-12 Marco Urbano Solar collectors receiver tubes

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120211003A1 (en) * 2009-10-27 2012-08-23 Schott Solar Ag Absorber tube and method for the reversible loading and unloading of a getter material
US9920956B2 (en) * 2009-10-27 2018-03-20 Schott Solar Ag Absorber tube and method for the reversible loading and unloading of a getter material
US20140158113A1 (en) * 2011-08-04 2014-06-12 Marco Urbano Solar collectors receiver tubes
US9103565B2 (en) * 2011-08-04 2015-08-11 Saes Getters S.P.A. Solar collectors receiver tubes
US9027546B2 (en) * 2012-02-03 2015-05-12 Saes Getters S.P.A. Improvements for solar collector receiver tubes
US20220251678A1 (en) * 2019-05-22 2022-08-11 Atomic Energy Of Canada Limited/Ènergie Atomique Du Canada Limitèe Portable dehydriding apparatus and method of using same
US12077836B2 (en) * 2019-05-22 2024-09-03 Atomic Energy Of Canada Limited/Ėnergie Atomique Du Canada Limitèe Portable dehydriding apparatus and method of using same

Also Published As

Publication number Publication date
CN102859291B (zh) 2015-06-03
IL222502A (en) 2017-04-30
IL222502A0 (en) 2012-12-31
EP2325575A1 (en) 2011-05-25
JP2013531772A (ja) 2013-08-08
WO2011131456A1 (en) 2011-10-27
EP2494280A1 (en) 2012-09-05
CN102859291A (zh) 2013-01-02

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AS Assignment

Owner name: SAES GETTERS S.P.A., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:CONTE, ANDREA;VIALE, LUCA;REEL/FRAME:029043/0901

Effective date: 20110404

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION