RT Journal Article
T1 Contact angle measurement for LiBr aqueous solutions on different surface materials used in absorption systems
A1 Martinez-Urrutia, Asier
A1 Fernández de Arroiabe, Peru
A1 Ramirez, Miguel
A1 Martinez-Agirre, Manex
A1 Mounir Bou-Ali, M.
AB Wetting surface is a very important issue for the design of absorption applications and heat exchangers. The contact angle is deemed essential in wettability studies; However, LiBr aqueous solution contact angle studies are limited. This work analyses the contact angle of LiBr aqueous solution in the range of 0–55% mass fraction on different material surfaces: copper, aluminum, stainless-steel and polytetrafluoroethylene (PTFE) under atmospheric conditions. A sessile drop technique was used for measuring the contact angles, and a linear relation between solution surface tension and contact angle is observed in the tested materials. The study of three metals show hydrophilic performance (θ < 90°), whereas the PTFE shows hydrophobic performance. Additionally, the effect of the selection of the material, and consequent effect on the contact angle, on the minimum wetting rate and film thicknesses is presented under the working conditions of the absorption technologies. From the wettability point of view, the results show that using stainless-steel and aluminum leads to a slightly better performance than a copper made heat exchanger.
SN 0140-7007
YR 2018
FD 2018-11
LA eng
NO Martinez-Urrutia , A , Fernández de Arroiabe , P , Ramirez , M , Martinez-Agirre , M & Mounir Bou-Ali , M 2018 , ' Contact angle measurement for LiBr aqueous solutions on different surface materials used in absorption systems ' , International Journal of Refrigeration , vol. 95 , pp. 182-188 . https://doi.org/10.1016/j.ijrefrig.2018.05.041
NO Publisher Copyright: © 2018 The Authors
DS TECNALIA Publications
RD 3 jul 2024