Browsing by Author "Adedeji, A.A."

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    Internal microclimate: Service life assessment for a building attached with a solar chimney-collector
    (Epistemics in Science, Engineering and Technology, 2011) Adedeji, A.A.; Aweda, J.O.; Lasode, O.A.
    The use of a solar chimney-collector enhances natural ventilation and passive cooling strategies of buildings thus helps in reducing energy use, CO emission and pollution in general. The aim of this paper, therefore, is to obtain service life of a solar chimney-collector gadget attached to a specimen room to realize natural ventilation. The room was made of glass which conditioned it to a remarkable heat, while the solar chimney comprised of insulated wooden box, a vent pipe and an inlet opening with its cover made of the solar collector (a flat box of photovoltaic glass cap, optically coated aluminium absorber and a serpentine tube). Results of a five-week internal microclimatic conditions measurement, each for solar chimney and the specimen room with all windows opened and all windows closed, show that a test-retest reliability analysis of 0.745 and 0.711 were obtained respectively, while the average life-time failure probability of 0.266 was predicted, the chimney-collector system will serve for 50 years.
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    Production of creep measuring apparatus for laboratory use as sustainable measure in Nigeria
    (Journal of The Nigerian Institution of Mechanical Engineers, 2014) Aweda, J.O.; Adedeji, A.A.
    The teaching of science and engineering requires not only the theoretical aspects but requires intensive laboratory equipment for practical purposes to impact the essential knowledge in engineering and technology education. This paper presents the production of creep measuring apparatus that has a heating chamber. Materials used for the production of the apparatus were sourced locally. The machine was produced to compliment the practical needs of students in tertiary institutions. All the apparatus components (mild steel, fibre glass, copper wire and hollow cylinder of spiral elements) were fabricated and assembled in the Engineering workshop of the University of Ilorin. Creep was measured while varying the thermal conditions of the specimens in the heating chamber. The heating chamber temperature was set at 1000 C, 2000C and 3000C with the aid of thermostat which was attached to the heating chamber. Testing of this apparatus showed that it compared well with the imported one at 94.6% efficiency.