0387381 - ÚPT 2013 RIV CZ eng C - Conference Paper (international conference)
Mrňa, Libor - Lidmila, Z. - Podaný, K. - Forejt, M. - Kubíček, J.
Manufacturing of Solar Absorber by Unconventional Methods.
METAL 2012 Conference Proceedings. 21st International Conference on Metallurgy and Materials. Ostrava: TANGER Ltd, 2012. ISBN 978-80-87294-29-1.
[METAL 2012. International Conference on Metallurgy and Materials /21./. Brno (CZ), 23.05.2012-25.05.2012]
R&D Projects: GA MŠMT ED0017/01/01
Institutional support: RVO:68081731
Keywords : solar absorber * drawing in flexible tools * laser welding * austenitic steel
Subject RIV: JA - Electronics ; Optoelectronics, Electrical Engineering

Solar absorbers of flat type have the advantage of relatively simple production, but on the other hand, they have lower thermal efficiency and require perpendicular incidence of solar radiation on their surface. This contribution presents new type of solar absorbers where the above-mentioned disadvantages are reduced while keeping relative production simplicity. The solar absorber is characterized by the creation of the appropriate spatial structure in sheet metal by forming through a technology of drawing in flexible tools. This spatial structure not only increases the heat-transfer surface but also eliminates the need for perpendicular incidence of the incoming solar radiation. The component with this structure is fixed to the rear side of the absorber by laser welding. Inlet holes for the fluid are produced by Flow drill method.
Permanent Link: http://hdl.handle.net/11104/0216570