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Article ; Online: Effect of graphene nanopaint on performance of solar air heater attached with inclined and winglet baffles.

Dharmaraj, Santhosh Kumar / Ramasubbu, Harichandran / Rajendran, Vijayakumar / Ravichandran, Praveenkumar

Environmental science and pollution research international

2023  Volume 30, Issue 37, Page(s) 87330–87342

Abstract: Solar air heater is widely used for drying and industrial processing application. Different artificial roughened surfaces and coatings over the absorber plates are used to improve their performance of solar air heater by increasing absorption and heat ... ...

Abstract Solar air heater is widely used for drying and industrial processing application. Different artificial roughened surfaces and coatings over the absorber plates are used to improve their performance of solar air heater by increasing absorption and heat transfer. In this proposed work, the graphene-based nanopaint is prepared by wet chemical and ball milling method and the prepared graphene nanopaint is characterized using Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD). The prepared graphene-based nanopaint is coated on the absorber plate by conventional coating method. The thermal performance of the solar air heater coated with traditional black paint and graphene nanopaint is evaluated and compared. The day's maximum energy gain by the graphene-coated solar air heater is 972.84 W, whereas traditional black paint is only 808.02 W. The average energy gain of graphene nanopaint is 655.85 W, which is 12.9% higher than the traditional black paint. The maximum thermal efficiency for solar air heater coated with graphene nanopaint is 81%. Also the average thermal efficiency of graphene-coated solar air heater is 72.5%, which has a 13.24% higher average thermal efficiency when compared to conventional black paint-coated solar air heater. The average top heat loss for solar air heater coated with graphene nanopaint is 8.48% lower than solar air heater with traditional black paint.
MeSH term(s) Graphite/chemistry ; Sunlight ; Hot Temperature ; Desiccation ; Paint
Chemical Substances Graphite (7782-42-5)
Language English
Publishing date 2023-07-08
Publishing country Germany
Document type Journal Article
ZDB-ID 1178791-0
ISSN 1614-7499 ; 0944-1344
ISSN (online) 1614-7499
ISSN 0944-1344
DOI 10.1007/s11356-023-28646-y
Shelf mark
Z 5915: Show issues
Database MEDical Literature Analysis and Retrieval System OnLINE

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