Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
MICROSTRUCTURAL AND THERMAL BEHAVIOR STUDY OF SOLAR BLACK CHROMIUM ABSORBERS
Submission Author:
Aline Karla Barbosa da Silva , PB
Co-Authors:
Ithyara Medeiros, Aline Karla Barbosa da Silva, Kelly Cristiane Gomes, Aline da Silva Oliveira, Gabriela Galvão
Presenter: Aline Karla Barbosa da Silva
doi://10.26678/ABCM.COBEM2019.COB2019-1908
Abstract
Energy from the sun can be harnessed as a source of heat for heating or for the generation of electricity. One of the ways of harnessing solar energy is through flat plate solar collectors. Although its use is usually employed for heating water at low temperatures, the use of selective adsorbent films has provided increased efficiency of this equipment, enabling a higher operating temperature (above 400 ° C). As a result of the above, this study had the objective of producing and evaluating black chromium absorber films by the electrodeposition technique to be used as a selective surface for application in medium and high temperature solar collectors. For that, microstructural and thermal analyzes of the films were performed. In this way, it was possible to identify that the films are amorphous in nature, that the electrodeposited coating for 10 minutes presents values of Rp and Rv within the range of interest of the studied wavelength, due to the nucleation that is accentuated in greater times, and it was evidenced that the loss of mass up to 400 ° C was approximately 5%, so it is interesting to use a selective surface of the multilayer type to increase the performance of the absorber film.
Keywords
Solar Energy, electrodeposition, black chrome
