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US6234166: Absorber-reflector for solar heating

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Filing Information

Inventor(s) Dina Katsir · Zvi Finkelstein · Israel Tartakovsky · Irina Tartakovsky ·
Assignee(s) Acktar Ltd. ·
Attorney/Agent(s) Hedman & Costigan, P.C. ·
Primary Examiner Carl D. Price ·
Application Number US9343536
Filing date 06/30/1999
Issue date 05/22/2001
Predicted expiration date 06/30/2019
U.S. Classifications 126/701  · 126/907  · 126/714  · 126/702  ·
International Classifications --
Kind CodeB1
International Classifications 126907 · 126908 · 126705 · 126707 · 126708 · 126569 · 126701 · 126702 · 126703 · 126648 · 126650 ·
18 Claims, 3 Drawings


Abstract

A solar absorber-reflector is provided for solar heat transmission into a heat absorbing chamber and/or repelling back of solar heat resulting from incident solar radiation. The solar absorber-reflector is also suitable as a passive thermal control material for space applications, and consists of several layers. The minimal configuration includes three basic layers: a layer with a selective solar radiation absorbing surface, having high absorptance of solar radiation and low thermal emittance; a layer with a light-reflecting surface facing a direction opposite to the selective solar radiation absorbing surface; and a polymer film being transparent to visible light and possessing high thermal emittance, with a heat-emitting surface facing the same direction as the light-reflecting surface. The various layers and surfaces of the solar absorber-reflector are oriented, constructed and bonded together, enabling operation in a solar-heating mode, in which the incident solar radiation is absorbed and the resulting solar heat is transmitted into the heat absorbing chamber, or in a light-reflector mode, in which the incident solar radiation is reflected and the resulted solar heat is repelled back and prevented from penetrating into the heat absorbing chamber, or in a mixed mode, in which a part of the solar absorber-reflector operates in a solar-heating mode and a part of the solar-absorber-reflector operates in a light-reflection mode, simultaneously.

Independent Claims | See all claims (18)

  1. 1. A solar absorber-reflector for alternately transmitting into a heat absorbing chamber and repelling back solar heat resulting from incident solar radiation, comprising: (a) a first set of layers, including in the following sequence: (i) a layer with a selective solar radiation absorbing surface, for absorbing the solar heat in a solar-heating mode in which said selective solar radiation absorbing surface is exposed to the incident solar radiation; (ii) a layer with a light-reflecting surface facing a reverse direction in relation to said selective solar radiation absorbing surface, for reflecting the solar radiation in a light-reflection mode in which said light-reflecting surface is exposed to the incident solar radiation; and (iii) a layer with a heat-emitting surface facing said reverse direction, for re-emitting the solar heat in said solar-heating mode, and for repelling the solar heat in said light-reflection mode.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US3987780* American Cyanamid Company Nozik et al. Oct 1976
US4002159* ANGILLETTA DOMENICK J Angilletta Jan 1977
US4320155* PPG Industries, Inc. Gillery Mar 1982
US4487197* Glaverbel Hoyois Dec 1984
US5523132* The University of Sydney Zhange et al. Jun 1996

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
DE2923251*KOESTER HELMUTDec 1980
EP0052569*Angelo PedoneMay 1982
JP35413942*Oct 1979
* cited by examiner

Other Publications

Solar Energy Materials, 1, (1979) 391, 328-338, 340-341, “Coatings for Enhanced Photothermal Energy Collection”, by Carl M. Lampert.
Solar Energy Materials and Solar Cells, 44 (1996) 69-78, “Cathodi c ARC Deposition of Solar Thermal Selective”, by Y. Yin et al.
AIAA, (1992), 88-97, “Estimation of the End-Of-Life Optical Properties of Z-93 Thermal Control Coating for the Space Station Freedom” by Mark M. Hasegawa et al.

Referenced By

Patent Family

Document NumberAssigneeInventorsIssue/Pub Date
US6234166 Acktar Ltd. Dina Katsir et al. May 2001
IL136915 ACKTAR LTD KATSIR DINA et al. Jul 2003
EP1065450 Acktar Ltd. Dina Katsir et al. Apr 2006
DE60027359 ACKTAR LTD KATSIR DINA et al. May 2006