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Optimization of Windows for Closed Receivers and Receiver-Reactors: Enhancement of Optical Performance.

Heller, P. (1990) Optimization of Windows for Closed Receivers and Receiver-Reactors: Enhancement of Optical Performance. In: Proceedings 5th IEA Symposium on Solar High Temperature Technologies. 27-31 August 1990, Davos, Switzerland..

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Abstract

To reduce reflectance losses from closed receivers or chemical receiver-reactors, anti-reflection coatings, surface etching and geometrical forming of the window seem to be possible. Because of the high temperature application of these receiver types the use of antireflection (AR) coatings and etching processes on the windows are not possible at the moment. Etching can be used on borosilicate glass (Pyrex) and silicate glass, but not on quartz glass, which is needed for its high temperature resistance. The paper shows that the reflectance losses may be reduced to less than 1 percent of the incoming radiation by geometrical forming. Calculations for various shapes were carried out based on the Monte-Carlo method. With this statistical method, good approximation to the real angular flux distribution can be achieved. All shapes reach reflectance losses less than 1 %, depending on the height of the glass body.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=1990, note=096, pages=9,
Title:Optimization of Windows for Closed Receivers and Receiver-Reactors: Enhancement of Optical Performance.
Authors:
AuthorsInstitution or Email of Authors
Heller, P.UNSPECIFIED
Date:1990
Journal or Publication Title:Proceedings 5th IEA Symposium on Solar High Temperature Technologies
Status:Published
Keywords:Receiver Reactor, Optical Performance
Event Title:27-31 August 1990, Davos, Switzerland.
HGF - Research field:UNSPECIFIED
HGF - Program:other
HGF - Program Themes:other
DLR - Research area:UNSPECIFIED
DLR - Program:no assignment
DLR - Research theme (Project):UNSPECIFIED
Location: Stuttgart
Institutes and Institutions:Institute of Technical Thermodynamics
Deposited By: elib DLR-Beauftragter
Deposited On:02 Apr 2006
Last Modified:27 Apr 2009 05:54

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