الفهرس 
REVIEW OF LITERATUREOnly 14 pages are availabe for public view
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Abstract
The main aim of the present study is to fabricate and evaluate a rotating grader for grading cereal corps. The effect of different holes sizes (<7.5, 7.5 to 9.5 and 9.5 to 11.0 mm), inclination angles (0, 3, 5 and 7ᵒ) and rotational speeds of drum (25, 30, 35, 40, 45 and 50 rpm) were studied. The grader productivity, efficiency, specific energy consumption and costs were determined. The obtained results indicated that the grader productivity increased from 11.73 to 49.38, 145.72 to 213.38 and 110.29 to 236.52 kg h-1, with increasing holes size from small to large, inclination angles increased from 0 to 7ᵒ and rotational speed of drum increased from 25 to 50 rpm, respectively. The grader efficiency decreased from 99.00% to 81.89%, 89.38 %to 87.12% and 89.46 to 86.62 %, with increasing holes size from small to large, inclination angles increased from 0 to 7ᵒ and rotational speed of drum increased from 25 to 50 rpm, respectively. The highest value of energy consumption for grading corn seeds was 0.25 kW kg-1 was found for 50 rpm of rotational speed of screen drum with 0 inclination angle, while, the lowest value of energy consumption for grading corn seeds was 0.13 kW kg-1 was found for 25 rpm of rotational speed of screen drum with 7ᵒ inclination angle. The specific energy consumption of grader increased from 10.77 to 13.62 and 9.14 to 14.81 kW h ton-1, with increasing inclination angles increased from 0 to 7ᵒ and rotational speed of drum increased from 25 to 50 rpm, respectively. The total cost of grader decreased from 0.07 to 0.05 and 0.09 to 0.04 EGP kg-1, with increasing inclination angles increased from 0 to 7ᵒ and rotational speed of drum increased from 25 to 50 rpm, respectively.