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公开(公告)号：US20190226727A1
公开(公告)日：2019-07-25
申请号：US16313766
申请日：2016-06-27
发明人： Scott Alan Eastman , Sergei F. Burlatsky , Joseph V. Mantese , Wei Xie , Subramanyaravi Annapragada , Parmesh Verma , Vadim V. Atrazhev , Vadim I. Sultanov
摘要： An electrocaloric element for a heat transfer system includes an electrocaloric material of a copolymer of (i) vinylidene fluoride, (ii) an addition polymerization monomer selected from tetrafluoroethylene, trifluoroethylene, vinyl fluoride, or combinations thereof, and (iii) a halogenated addition polymerization monomer larger than vinylidene fluoride. It is also provided that: (a) the monomer (ii) includes an addition polymerization monomer smaller than trifluoroethylene, (b) at least one of the addition polymerization monomers (ii) or (iii) is a chiral monomer, and the copolymer includes syndiotactic ordered segments of chiral monomer units, and/or (c) at least one of the addition polymerization monomers (ii) or (iii) comprises chlorine, and the copolymer includes an ordered distribution of monomer units comprising chlorine along the copolymer polymer backbone.
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公开(公告)号：US20190003746A1
公开(公告)日：2019-01-03
申请号：US16064784
申请日：2015-12-21
摘要： A method of making an electrocaloric element includes dissolving or dispersing an electrocaloric polymer in an organic solvent having a boiling point of less than 100° C. at 1 atmosphere to form a liquid composition comprising the electrocaloric polymer. A film of the liquid composition is cast on a substrate, and the organic solvent is evaporated to form a film of the electrocaloric polymer. The film is removed from the substrate and disposed between electrical conductors to form an electrocaloric element.
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公开(公告)号：US20240344744A1
公开(公告)日：2024-10-17
申请号：US18755138
申请日：2024-06-26
CPC分类号： F25B21/00 , B29C41/003 , B29C41/12 , H10N15/15 , B29K2995/0003 , B29L2007/008 , F25B2321/001 , Y02B30/00
摘要： A method of making an electrocaloric element includes dissolving or dispersing an electrocaloric polymer in an organic solvent having a boiling point of less than 100° C. at 1 atmosphere to form a liquid composition comprising the electrocaloric polymer. A film of the liquid composition is cast on a substrate, and the organic solvent is evaporated to form a film of the electrocaloric polymer. The film is removed from the substrate and disposed between electrical conductors to form an electrocaloric element.
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公开(公告)号：US20190003748A1
公开(公告)日：2019-01-03
申请号：US16064827
申请日：2015-12-21
发明人： Mikhail B. Gorbounov , Parmesh Verma , Subramanyaravi Annapragada , Andrzej E. Kuczek , Matthew E. Lynch , Andrew Smeltz , Neal R. Herring , Ulf J. Jonsson , Thomas D. Radcliff
IPC分类号： F25B21/00
摘要： A heat transfer system is disclosed that includes a plurality of electrocaloric elements (12) including an electrocaloric film (14), a first electrode (16) on a first side of the electrocaloric film, and a second electrode (18) on a second side of the electrocaloric film. A fluid flow path (20) is disposed along the plurality of electrocaloric elements, formed by corrugated fluid flow guide elements (19).
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公开(公告)号：US20180363956A1
公开(公告)日：2018-12-20
申请号：US16064820
申请日：2015-12-21
发明人： Scott Alan Eastman , Andrzej E. Kuczek , Subramanyaravi Annapragada , Joseph V. Mantese , Ram Ranjan , Vladimir Blasko , Parmesh Verma , Ulf J. Jonsson
摘要： A heat transfer system includes an electrocaloric element comprising an electrocaloric film (12). A first electrical conductor is disposed on a first side of the electrocaloric film, and a second electrical conductor is disposed on a second side of the electrocaloric film. At least one of the first and second electrical conductors is an electrically conductive liquid. An electric power source (20) is in electrical contact with the first and second electrical conductors, and is configured to provide an electrical field across the electrocaloric film. A liquid flow path (28) is disposed along the plurality of electrocaloric elements for the electrically conductive liquid.
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公开(公告)号：US12061021B2
公开(公告)日：2024-08-13
申请号：US16064784
申请日：2015-12-21
CPC分类号： F25B21/00 , B29C41/003 , B29C41/12 , H10N15/15 , B29K2995/0003 , B29L2007/008 , F25B2321/001 , Y02B30/00
摘要： A method of making an electrocaloric element includes dissolving or dispersing an electrocaloric polymer in an organic solvent having a boiling point of less than 100° C. at 1 atmosphere to form a liquid composition comprising the electrocaloric polymer. A film of the liquid composition is cast on a substrate, and the organic solvent is evaporated to form a film of the electrocaloric polymer. The film is removed from the substrate and disposed between electrical conductors to form an electrocaloric element.
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公开(公告)号：US11448436B2
公开(公告)日：2022-09-20
申请号：US16064812
申请日：2015-12-21
发明人： Wei Xie , Subramanyaravi Annapragada , Joseph V. Mantese , Parmesh Verma , Thomas D. Radcliff , William A. Rioux
摘要： A method of making an electrocaloric element includes forming conductive layers on opposing surfaces of a film comprising an electrocaloric material to form an electrocaloric element, wherein the forming of the conductive layers includes one or more of: vapor deposition of the conductive layers under reduced pressure for a duration of time, wherein the duration of time under reduced pressure is less than 240 minutes; vapor deposition of the conductive layers under reduced pressure for a duration of time, wherein the duration of time of exposure to conductive material deposition is less than 240 minutes; vapor deposition of the conductive layers under reduced pressure, wherein the reduced pressure is 10−8 torr to 500 torr; or maintaining the film at a temperature of less than or equal to 200° C. during forming of the conductive layers.
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公开(公告)号：US11428444B2
公开(公告)日：2022-08-30
申请号：US16313762
申请日：2016-06-27
发明人： Scott Alan Eastman , Joseph V. Mantese , Wei Xie , Subramanyaravi Annapragada , Parmesh Verma , Sergei F. Burlatsky , Wayde R. Schmidt , Treese Hugener-Campbell
摘要： A heat transfer system is disclosed in which, an electrocaloric material includes a copolymer of a monomer mixture including (i) vinylidene fluoride, (ii) an addition polymerization monomer selected from tetrafluoroethylene, trifluoroethylene, or a monomer smaller than trifluoroethylene, and (iii) a halogenated addition polymerization monomer different than (ii) that is larger than vinylidene fluoride. The electrocaloric material also includes an additive selected from a nucleating agent having a polar surface charge, electrocalorically active solid particles, or a combination thereof. Electrodes are disposed on opposite surfaces of the electrocaloric material, and an electric power source is configured to provide voltage to the electrodes. The system also includes a first thermal flow path between the electrocaloric material and a heat sink, and a second thermal flow path between the electrocaloric material and a heat source.
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公开(公告)号：US20190003747A1
公开(公告)日：2019-01-03
申请号：US16064822
申请日：2015-12-21
发明人： Craig R. Walker , Jonathan Rheaume , Michael L. Perry , Scott Alan Eastman , Subramanyaravi Annapragada , Parmesh Verma , Joseph V. Mantese
IPC分类号： F25B21/00
摘要： A heat transfer system is disclosed including a plurality of modules arranged in a stack. The stack modules include electrocaloric element and electrodes on each side of the film. A fluid flow path is disposed between two or more electrocaloric elements. A first electrical bus element (18) in electrical contact with the first electrode (14), and a second electrical bus element (20) in electrical contact with second electrode (16). The first electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said first electrical bus, or the second electrical bus element is electrically connected to at least one other electrical bus of another electrocaloric element in the stack at the same polarity as said second electrical bus.
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公开(公告)号：US20180375008A1
公开(公告)日：2018-12-27
申请号：US16064812
申请日：2015-12-21
发明人： Wei Xie , Subramanyaravi Annapragada , Joseph V. Mantese , Parmesh Verma , Thomas D. Radcliff , William A. Rioux
摘要： A method of making an electrocaloric element includes forming conductive layers on opposing surfaces of a film comprising an electrocaloric material to form an electrocaloric element, wherein the forming of the conductive layers includes one or more of: vapor deposition of the conductive layers under reduced pressure for a duration of time, wherein the duration of time under reduced pressure is less than 240 minutes; vapor deposition of the conductive layers under reduced pressure for a duration of time, wherein the duration of time of exposure to conductive material deposition is less than 240 minutes; vapor deposition of the conductive layers under reduced pressure, wherein the reduced pressure is 10 torr to 500 torr; or maintaining the film at a temperature of less than or equal to 200° C. during forming of the conductive layers.
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