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Proceedings Paper

Heat Loss Mechanisms In Transparent Insulation With Honeycomb Structures
Author(s): V. Wittwer; W. Stahl; A. Pfluger; A. Goetzberger; J. Schmid
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Paper Abstract

The development of highly transparent insulation materials is an important step in raising the efficiency of flat plate collectors and for passive use of solar energy in buildings. The problem in combining selective absorbers and honeycomb structures is that the radiation losses due to thermal emission of the material of the structure may be larger than the losses due to convection which are present without the structure. Therefore a thorough analysis of the different loss mechanisms has been made. There are two possibilities for overcoming these difficulties. The first is the use of materials with low absorptance in the infrared or with selective surfaces for the honeycomb structure. The second possibility is the use of highly IR-absorbing materials. In the latter case a selective absorber is not needed. Results from both approaches will be presented.

Paper Details

Date Published: 1 December 1983
PDF: 5 pages
Proc. SPIE 0428, Optical Materials and Process Technology for Energy Efficiency and Solar Applications, (1 December 1983); doi: 10.1117/12.936307
Show Author Affiliations
V. Wittwer, Fraunhofer-Institut fur Solare Energiesysteme (West 'Germany)
W. Stahl, Fraunhofer-Institut fur Solare Energiesysteme (West Germany)
A. Pfluger, Fraunhofer-Institut fur Solare Energiesysteme (west Germany)
A. Goetzberger, Fraunhofer-Institut fur Solare Energiesysteme (West Germany)
J. Schmid, Fraunhofer-Institut fur Solare Energiesysteme (West Germany)


Published in SPIE Proceedings Vol. 0428:
Optical Materials and Process Technology for Energy Efficiency and Solar Applications
Carl M. Lampert, Editor(s)

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