Mathematical Model and experimental testing of a plane mirror augmented box solar cooker with trapezium shape
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Date
2018-12-10
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University of Eloued جامعة الوادي
Abstract
Solar cooking technology is one of the attractive
options in developing countries capable to meet energy-cooking
demand. In this paper, a mathematical model of the heat
transfer mechanisms involved with a plane mirror augmented
box-type solar energy cooker has been presented in order to
determine the thermal behaviour in the cooker based on the
energy balance equations for the temperature elements. The
cooker is constructed with a trapezium shape for maximising
solar beam falling onto the absorber plate and equipped with a
plane booster mirror reflector hinged at the top of the cooker
for maximum concentration. The model is based on an
analytical solution of the energy balance equations for different
components of the cooker: such as glass cover, air inside,
absorber plate, cooking vessel, cooking fluid. To validate the
model, the temperature distribution obtained by a developed
computer program is compared with experimental results
measured for a typical day in Ghardaïa (32.39 °N, 3.78 °E)
Algeria). For this purpose, the box solar cooker were designed,
realized and tesyed by the authors at URAER? Ghardaïa. A
data acquisition chain equipped with various measuring
instruments was installed for the control of the system. The
values of measured cooker’s temperatures through the
AGILENT data acquisition unit were visualized numerically
and graphically. The theoretical results are found to be in good
agreement with the experimental results. The model was then
employed to simulate the performance of the realized solar
cooker, several temperature maps were obtained for summer
and winter clear sky conditions at Algeria country showing
areas in which the solar cooker can be operated effectively
during the year. The sample results presented in this paper
indicated the high potential of solar cooking in the study region
depending on the amount of received solar radiation.
Description
International Symposium on Mechatronics and Renewable Energies El-Oued 10- 11 December 2018
Keywords
Global solar radiation, Box solar cooker, Thermal modeling, Experimental validation, Temperature mapping.