Browsing by Author "Ajiboye, T.K."
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Item Effects of mixing ratios of cow dung, cassava peel and rice husk on the thermodynamic properties and composition of biogas in anaerobic digester(Advances in Multidisciplinary & Scientific Research Journal, 2016) Olorunmaiye, J.A.; Adegun, I.K.; Ogunniyi, O.J.; Aweda, J.O.; Ajiboye, T.K.; Abdulkareem, S.Item Investigation of thermal insulation properties of biomass composites(International Journal of Technology, 2016) Abdulkareem, S.; Ogunmodede, S.; Aweda, J.O.; Abdulrahim, A.T.; Ajiboye, T.K.; Ahmed, I.I.; Adebisi, J.A.This paper reports on the investigation of thermal properties of Kapok, Coconut fibre and Sugarcane bagasse composite materials using molasses as binder. The composite materials were moulded into 12 cylindrical samples using Kapok, Bagasse, Coconut fibre, Kapok and Bagasse in the ratios of (70:30; 50:50 and 30:70), Kapok and Coconut fibre in the ratios of (70:30; 50:50 and 30:70), as well as a combination of Kapok, Bagasse and Coconut fibre in ratios of (50:10:40; 50:40:10 and 50:30:20). The sample is 60mm diameter with thickness 10mm – 22mm was compressed at a constant load of 180N using Budenberg compression machine. Thermal conductivity and thermal diffusivity tests were carried out using thermocouples to sense the temperatures and read out on a Digital Multimeter MY64 (Model: MBEB094816) while a Digital fluke K/J thermocouple metre PRD-011 (S/NO 6835050) was used to obtain the temperature measurement for diffusivity. It was observed that of all the twelve samples moulded, Bagasse, Kapok plus Bagasse (50:50), has the lowest thermal conductivity of 0.0074, 0.0106, 0.0132 and 0.0127 W/(m-K) respectively and highest thermal resistivity. In this regard, Bagasse has the lowest thermal conductivity followed by Kapok plus Bagasse (50:50), Kapok plus Bagasse plus Coconut fibre (50:40:10) and Kapok plus Coconut fibre (50:50).Item Investigation on effect of material compositions on machinability of carbon steels(Journal of Physics: Conference Series, 2019) Abdulkareem, S.; Ogedenbge, T.S.; Aweda, J.O.; Ajiboye, T.K.; Khan, A.A.; Babatunde, M.A.Steels are basically classified based on their carbon contents. In view of this, the processing of steels is greatly affected by their composition, particularly their carbon content. This paper reports on the machinability of three different steels with varying carbon contents. The steel samples were sourced from Owode metal market in Ilorin, Kwara State and their percentage compositional analysis was carried out at Universal Steels Limited, Lagos. The steel samples were classified into high, medium and low carbon steels based on their percentage carbon content. The machining condition was wet and the machining parameters used were depth of cut (0.2 – 0.6 mm), feed rate (0.05 – 0.15 mm/rev) and cutting speed (100 - 150 rpm). The experimental runs were designed using Taguchi orthogonal array of Minitab version 16 and the cutting temperature was monitored with a digital thermometer and k-type thermocouple wires. The experimental results were analysed using Minitab 18 with a focus on percentage contribution of various factors affecting surface roughness, chip morphology, cutting temperature and material removal rate. Results show that surface finish is highest in low carbon steel and lowest in high carbon steel. The responses show that machinability of the steel improved with a reduction in carbon content.