EXPERIMENTAL STUDY ON
SOLAR HEATING BY NATURAL HEAT CONVECTION AND RADIATION
SeifA. Ahmed
Mechanical
Engineering Department, Faculty of Engineering, Beni-Suef University, BeniSuef,
Egypt
ABSTRACT
Heat storage is a good energy
saving option these days. Heat storage makes it possible to use thermal energy
at the required time. Solar water heaters for construction purposes and
industrial purposes are the best source to maintain traditional energy sources
and thus can maintain high quality energy and liquid or steel fuel due to the
highest rise in their prices. In recent years, using solar energy has become
remarkably cheap and especially noteworthy. The efficiency of natural solar
water heater system depends on collector and reservoir setting, design and environmental
factors such as solar intensity, ambient temperature and wind conditions. Also,
the relative height of the tank and collector separation mainly affects the
volume of the Siphon thermal flow rates, including both forward and reverse
flow at night. In this pilot investigation, two parallel rectangular glass
plates were connected to the hot water storage tank. The effect of the
separation space between the plates (collectors) (D) was investigated and
reported. The results reported that outlet temperature in case D= 15 cm for two
plates decreased approximately 24% and 23% for two plates. Also, the heat
radiated to the room decreased as the inner space between the two plates
increased, and decreased to approximately 25% as compared to stack plates.
KEYWORDS
Solar thermal storage; solar
thermal collectors; Naturalheat convection and Radiation.
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