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Proceedings Paper

Comparison of three different collectors for process heat applications
Author(s): Stefan Brunold; R. Frey; Ulrich Frei
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Paper Abstract

In general vacuum tube collectors are used in solar process heat systems. Another possibility is to use transparent insulated flat plate collectors. A critical point however, is that most of the common transparent insulating materials can not withstand high temperatures because they consist of plastics. Thus, temperature resistive collector covers combining a high tranmisivity with a low U-value are required. One possibility is to use capillaries made of glass instead of plastics. Measurement results of collector efficiency and incident angle modifier will be presented as well as calculated energy gains for three different collectors: a vacuum tube collector (Giordano Ind., France), a CPC vacuum tube collector (microtherm Energietechnik Germany) and a new flat plate collector using glass capillary as transparent insulation (SET, Germany).

Paper Details

Date Published: 9 September 1994
PDF: 12 pages
Proc. SPIE 2255, Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII, (9 September 1994); doi: 10.1117/12.185361
Show Author Affiliations
Stefan Brunold, Solarenergie Pruef- und Forschungsstelle, Ingenieurschule ITR (Switzerland)
R. Frey, Solarenergie Pruef- und Forschungsstelle, Ingenieurschule ITR (Switzerland)
Ulrich Frei, Solarenergie Pruef- und Forschungsstelle, Ingenieurschule ITR (Switzerland)


Published in SPIE Proceedings Vol. 2255:
Optical Materials Technology for Energy Efficiency and Solar Energy Conversion XIII
Volker Wittwer; Claes G. Granqvist; Carl M. Lampert, Editor(s)

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