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- ItemPerformance Evaluation of Corn Roasted using Biohnia rufuscense and Sugarcane Bagasse Briquettes as an Alternative to Charcoal(2025-10-23) Kamoru Olufemi Oladosu, Abdulganiyu Issa, Ponle Eyitayo Ademola, Wasiu Ayinde Issa
- ItemPERFORMANCE EVALUATION OF SOLAR OVEN USING KAPOK WOOL AS INSULATION MATERIAL(2020-12) A. T. Abdulrahim; S. Abdulkareem; M. Haruna; A. S. Abdulraheem; F. A. Oluwole; G. M. Ngala; U. A. MukhtarSolar ovens are among common devices which utilize insulation materials because of their ability to retards heat transfer by acting as barriers in the path of heat flow. Previous solar box cookers have used cotton, saw dust, and fibre-glass as insulation materials but none has used Kapok wool despite its potential. This study is aimed at the performance evaluation of solar oven using Kapok wool as the insulation material. The solar box oven designed is of the size 59 x 56 x 36cm dimensions made of plywood, with an aperture area of 3304cm2 double glass cover and an oven’s floor area of 1225cm2 made of aluminum. Kapok wool was used to line the oven’s walls and floor serving as insulator. The solar box oven was tested at the University of Maiduguri, Borno State, Nigeria. It was tested without load to determine its stagnation temperature and to check its endurance under stagnation conditions. Similarly, a water boiling test was conducted to cook rice and beans. The results show that maximum stagnation temperature was 165.1°C and maximum overall daily thermal efficiency of 19.44% was achieved on a clear day test without reflector. The field test of the solar oven demonstrated its ability to cook rice and beans well with 1 kg of rice cooked under 2 hours, while 1 kg of beans was cooked under 1 hour 45 minutes on the same day. This performance demonstrated the suitability of Kapok wool as insulation material for solar ovens.
- ItemDEVELOPMENT OF A WATER AIR-CONDITIONER FOR THE SEMIARID REGION OF NIGERIA(2007-10) Aji I; ; Balami A.A.; Abdulrahim A. TThe harsh weather condition experienced in Maiduguri between the months of February and June of most years has been a problem to the populace. Buying conventional air-conditioners to ameliorate this problem is difficult for the ordinary people in Maiduguri. In an attempt to lower the temperature of an average 16m2 room, an electrically operated water supply cooling system was designed, constructed and tested and was found to make the room conducive for human comfort. Guard sponge was selected and used out of the existing sponges because it has been found to reduce the ambient temperature better than others. Weather conditions of Maiduguri for the past fifteen years and the unreliability of electricity supply were put into consideration in the design of the water air conditioner. The machine was able to reduce the temperature of an average room (16 m 2 ) by 28% over a period of 42 minutes. The efficiency of the water air-conditioner with respect to the conventional unit is 60%. Seventy five per cent the machine parts were sourced locally, this is to make its production cheap and more affordable to low income earners.
- ItemDEVELOPMENTS IN AUTOMOBILE EMISSION CONTROL(2004-10) Abdulrahim, A. T; M.L. Usmah; B. AlkaliIt is widely acknowledged that automobiles are becoming dominant contributors to atmospheric pollution in most of the world’s cities. Hence, the need to find effective methods of controlling automobile emissions becomes imperative. Available automobile emissions’ control measures which include various legislations and responses to legislations such as improvement in the state of the art controls, greater attention towards automobiles growth, improvement of engine design features, periodic tune-up, the use of alternative fuels and the development of non-fossil energy sources were reviewed in this paper.