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In this study design, construction and test of a solar bread cooker has been undertaken for solar radiation status in Kashan. In design step and in order to produce the required energy, use of a parabolic reflective surface for concentrating the solar flux on the back of a cooking plate was considered. For cooking thin bread with 45 cm diameter the diameter of the reflective surface was calculated 130 cm and the cooking plate diameter and thickness were considered 48 cm and 6 mm, respectively. Since the sun orientation changes with time the reflective surface became capable of being adjusted around a north-south as well as east-west axes; also it may be moved vertically up or down. For evaluating the performance, tests and measurements were performed on different days of summer, 1391. The results indicated the validity of calculations and showed the overall efficiency of the solar bread cooker is around 50%. With the solar cooker it is possible to cook 12 beards per hour each with 200 gr weight of dough in eight months of the year at least for six hours in every sunny day; also it may be used for cooking other foods.

Keywords: Solar Energy, Solar cooker, Bread cooking, Reflective surface

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