Forming a Structured Surface of a New Type of Solar Absorber with Hydroforming

• Published in: Advanced materials research Vol. 1127; pp. 49 - 54
• Main Authors: Mrna, Libor, Rihacek, Jan
• Format: Journal Article
• Language: English
• Published: Zurich Trans Tech Publications Ltd 26.10.2015
• Subjects: Austenitic stainless steels; Devices; Forming; Hydroforming; Incident radiation; Laser beam welding; Sheets; Surface chemistry; Solar Absorber; ANSYS; Austenitic Steel; Hydroforming; Numeric Simulation
• ISBN: 3038356239; 9783038356233
• ISSN: 1022-6680; 1662-8985; 1662-8985
• DOI: 10.4028/www.scientific.net/AMR.1127.49

One of the ways to increase efficiency of the solar absorber is modification of absorption area in the system of pyramidal cavities, where the incident radiation is absorbed by multiple reflections. The paper deals with the technology of production of the flow solar absorber with a structured surface in a single technological operation using hydroforming. Two laser-welded sheets are inserted into the forming chamber. Then the space between them is pressurized with hydraulic fluid which causes their form to the desired shape. The first part of this article describes hydroforming device. The second section deals with theoretical simulation of forming a different structured surface in the programming environment of ANSYS. As follows practical test of hydroforming is performed. Austenitic stainless steel X5CrNi18-10 was used as a material for the production of samples.