Photo-thermal Conversion Efficiency of Textured and Untextured Aluminum Substrate Coated With Titanium Dioxide (Tio2)-bound Cufemno4 Absorber
View/ Open
Date
2020Author
Ayieko, Charles O
Musembi, Robinson J
Aduda, Benard O
Ogacho, Alex
Pushpendra, Jain
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
The possibility of obtaining thermal energy from the sun for household bathing and washing has resulted to growth in market for solar thermal applications with new types of solar absorbers currently being investigated either to compliment or to replace existing ones. This study focuses on CuFeMnO4 absorber paint by addressing aspects which have little attention regarding improvement of optical absorption for higher efficiency such as texturing the metal substrates on which to coat CuFeMnO4 absorber paint. In this study, texturing was done controllably in order to match the incoming solar radiation wavelength and the surface topography and morphology. Textured and untextured aluminum sheets coated with titanium dioxide (TiO2)-bound CuFeMnO4 absorber paint were used to fabricate prototype flat plate solar thermal collectors.
Titanium dioxide (TiO2) was chosen here as binder to a spectrally selective CuFeMnO4 absorber paint. The TiO2-bound CuFeMnO4 absorber paint was applied by a simple, cheap and up-scalable dip coating method over the aluminum sheets. The aluminum sheets were electro-chemically textured to enhance optical absorption and photo-thermal conversion efficiency for both the textured and untextured prototypes were compared. The efficiency characterization of the prototype collectors was done by measuring the global solar irradiance, fluid inlet, fluid outlet and ambient temperature. Both instantaneous and steady-state efficiencies were determined mathematically, and it was found that the prototype collector whose absorber plates were textured recorded higher instantaneous and steady-state efficiencies compared to the collector fabricated from untextured
aluminum plates.
URI
https://www.researchgate.net/profile/Pushpendra-Jain-2/publication/342891606_Photo-thermal_Conversion_Efficiency_of_Textured_and_Untextured_Aluminum_Substrate_Coated_with_Titanium_Dioxide_TiO2-bound_CuFeMnO4_Absorber/links/5f1eb74245851515ef4d65f3/Photo-thermal-Conversion-Efficiency-of-Textured-and-Untextured-Aluminum-Substrate-Coated-with-Titanium-Dioxide-TiOsub2-sub-bound-CuFeMnOsub4-sub-Absorber.pdfhttp://erepository.uonbi.ac.ke/handle/11295/155234
Citation
Charles AO, Musembi RJ, Aduda BO, Ogacho A, Jain P. "Photo-thermal Conversion Efficiency of Textured and Untextured Aluminum Substrate Coated with Titanium Dioxide (TiO2)-bound CuFeMnO4 Absorber." American Journal of Modern Energy. 2020;6(1):9-15.Publisher
University of Nairobi
Rights
Attribution-NonCommercial-NoDerivs 3.0 United StatesUsage Rights
http://creativecommons.org/licenses/by-nc-nd/3.0/us/Collections
The following license files are associated with this item: