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November 22-23, 2018 | Paris, France
Journal of Materials Science and Nanotechnology | Volume: 2
Materials Physics and Materials Science
International Conference on
Experimental and numerical investigations of the effect of nano-coatings of window glazing on
thermal behavior of buildings in Saudi-Arabia
Ahmed Mohammed Almogbel
King Abdulaziz City of Science and Technology, Saudi Arabia
T
his studywasundertaken to investigate the thermal behavior
of nano-coatings of window glazing in a glazed test room
for the regional conditions of Saudi-Arabia. Well controlled
antimony doped tin oxide thin films on glass substrates
were prepared using the aerosol-assisted chemical vapor
deposition process to evaluate the films for solar control glazing
applications. The optical and thermal properties of the films
were measured and systematically investigated. The influence
of antimony doping levels on absorption and reflection of solar
radiation is examined with respect to the optical properties
in the visible and near infrared spectra range. Glass U-factor,
Solar Heat Gain Coefficient (SHGC), temperature distribution
and net heat transfer through the glazed walls inside the
room were calculated through numerical simulations. The
experimental and numerical results obtained indicate that the
nano-coating thickness and doping level concentration of ATO
has pronounced effect on the thermal insulation of the window
glass. It was noted that the overall transmittance of solar
radiation in the visible, infrared and ultraviolent spectra regions
decrease with increase of doping level of antimony tin oxides
and increase of coating thickness. It was observed that the
net heat transfer through the glazed walls of room decreased
exponentially with increase of coating thickness or doping
level concentration. Finally, from the analysis of results it was
concluded that the antimony doped tin oxide thin films show
outstanding optical and thermal properties and in comparison,
to commercially available glazing, an improved solar blocking
behavior is observed for nanostructured ATO thin films.
Speaker Biography
Ahmed M Almogbel has over fifteen years of teaching in research, management and
training in different areas of mechanical engineering, including power, materials, design
and manufacturing. He has 15 technical papers to his credit and supervised 7 graduation
projects in various areas of heat transfer, fluid mechanics, air conditioning manufacturing
and science of materials. He is specialized in air conditioning systems, human thermal
comfort inside the building envelope and thermal insulations. He is currently conducting
applied researches in solar air-conditioning system, desiccant-evaporative cooling
technology, and energy performance optimization for hot and dry air conditioning systems.
Ahmed is the principle investigator for the running strategic project in KACST about the
solar adsorption air conditioning system.
e:
aalmogbel@kacst.edu.sa