Indoor and outdoor performance study of metallic zinc particles in black paint to improve solar absorption for solar still application
Document Type
Article
Publication Date
5-1-2021
Abstract
In this study, the effects of metallic zinc (Zn) particles were studied to increase surface temperature on a solar-still absorber, which is a major component of increased production. Various concentrations of Zn particles were mixed in black paint and applied to the absorber plate. SEM and XRD were used to examine and confirm the surface morphology and phase identification of as-received powder. UV-Vis spectroscopy was used to examine light-absorption properties. Finally, extensive indoor testing (using an improvised solar emulator) and outdoor testing were conducted to optimize the concentration. The specimens containing 10 wt% Zn in black paint showed the highest increase in temperature, i.e., 103.53 degrees C in indoor conditions at 1000 W/m(2) irradiation, which is 59.17% higher than a bare aluminum plate and 17.57% higher than an only black-paint-coated aluminum plate. On the other hand, specimens containing 10 wt% Zn reached just 87.53 degrees C, compared to 80.00 degrees C for an only black-paint-coated aluminum plate and 60.62 degrees C for bare aluminum.
Keywords
Absorber, Desalination, Zinc, Solar still, Temperature, Thermal conduction
Divisions
umpedac
Funders
Higher Institution Centre of Excellence (HICoE) Program Research Grant, UMPEDAC-2018 (MOHE HICOE-UMPEDAC), Ministry of Education Malaysia, TOP100UMPEDAC, University of Malaya [RU005-2015],National Research Foundation of Korea Ministry of Science, ICT & Future Planning, Republic of Korea [2020R1A2C1013693]
Publication Title
Coatings
Volume
11
Issue
5
Publisher
MDPI
Publisher Location
ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND