scholarly works
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Item Design and fabrication of a water distiller(Scholarlink Research Institute, 2010) Oyawale, F. A.; Odior, A. O.; Ismaila, M. M.The objective of this project is to design and fabricate a low cost water distiller capable of producing water that is pure in all ramifications for domestic and commercial consumers. The critical components of the distiller are made of stainless steel. These parts include the tank, the lid/condenser and the distilled water collector. Selection of material used is based on both their physical and chemical properties. The tank has a square base and the opening end of the tank is slanted. This will make the condensate to trickle downward for collection at the end of the lid. The lid is continuously cooled by water at room temperature that runs from a tap. The distiller is able to produce 29.4 x 10-3 litres (29.4 ml) of distilled water in 10 minutes. Once the water is boiled, the heater can be switched off and continuous cooling of the condenser/lid could last 30 minutes. The volume of water produced is approximately 105.3ml. Distillation continues until the temperature drops to room temperature i.e. 25°C by which time, the volume of distilled water will drop since the production of steam will decrease due to the drop in temperature of water in the tank. The water distiller is designed and fabricated from locally sourced materials and this makes it cheap and affordable to the common man in our society.Item Some operations of electric power supply system in Benin City area of Nigeria(Science Hub, 2010) Odior, A. O.; Oyawale, F. A.; Ovuworie, G. C.The Power Holding Company of Nigeria (PHCN) is responsible for generating, transmitting, distributing and selling electric power to the various consumers throughout the country. The paper presents the results of an investigation conducted on some of the operations of Power Holding Company of Nigeria (PHCN) to determine some of the major factors affecting the availability of power supply to consumers in Benin City area of Nigeria. The average number of operating transformers in various substations and their percentage loadings were also studied. It was discovered that the average power supply to Government Reservation Area (GRA) was more regular and stable than that of Siluko area of Benin City.Item Some grinding factors affecting locally formulated silicon carbide abrasive wheels(Nigerian Institution of Production Engineers, 2010-04) Odior, A. O.; Oyawale, F. A.; Akpobi, J. A.; Charles-Owaba, E.O.A grinding wheel is an expendable wheel which is made of very small, sharp and hard silicon carbide abrasive particles or grits held together by strong porous bond. This paper presents a study on some factors and parameters of silicon carbide abrasive grinding wheels which were developed and formulated from locally sourced raw materials in Nigeria. Six local raw material substitutes were identified through pilot study and a systematic search for an optimal formulation of silicon carbide was conducted using the Taguchi method. The produced silicon carbide abrasive grains were used to manufacture grinding wheels. Some of the grinding factors of locally manufacture grinding wheel include: wheel wear, wheel grinding ratio, wheel hardness, bond strength, size and grade of the manufactured silicon carbide abrasive grains.Item Manufacture of abrasive grinding wheel using silicon carbide abrasive materials(2010-04) Odior, A. O.; Oyawale, F. A.; Charles-Owaba, O. E.; Akpobi, J. A.Abrasive materials are materials of extreme hardness that are used to shape other materials by a grinding or abrading action and they are used either as loose grains, as grinding wheels, or as coatings on cloth or paper. A grinding wheel is made of very small, sharp and hard silicon carbide abrasive particles or grits held together by strong porous bond. The manufacture of silicon carbide abrasives and grinding wheel in Nigeria has been severely impeded by the difficulty of identifying suitable local raw materials and the associated local formulation for abrasives and grinding wheel with global quality standards. This paper presents a study on the formulation and manufacture of abrasive grinding wheel using silicon carbide abrasive grains in Nigeria. Six local raw material substitutes were identified through pilot study and with the initial mix of the identified materials, a systematic search for an optimal formulation of silicon carbide, the intermediate product, was conducted using the Taguchi method. The mixture was fired in a furnace to 1800°C for 6 hours forming silicon carbide chunks, which were crushed and sieved into coarse and fine grades of abrasive grains. Combining each grade with appropriate proportion of latex binder to form paste in a compressed mould cavity of desired shape and size, coarse and fine grinding wheels of international standard were produced.Item Manufacture of abrasive grains from locally sourced raw materials in Nigeria(Scholarlink Research Institute, 2010) Odior, A. O.; Oyawale, F. A.The manufacture of abrasive grains in Nigeria has been severely impeded by the difficulty of identifying suitable local raw materials and the associated local formulation for abrasives with global quality standards. This paper presents study on the formulation and manufacture of silicon carbide abrasives using locally sourced raw materials in Nigeria. Five local raw material substitutes were identified through pilot study and with the initial mix of the identified materials a systematic search for an optimal formulation of silicon carbide abrasive grains was conducted. The mixture was fired in a furnace to 1600⁰C for 6 hours forming silicon carbide chunks which were crushed and sieved into coarse and fine grades of abrasive grains of international standardItem A genetic algorithm for flow shop scheduling problem(2010-04) Odior, A. O.; Oyawale, F. A.; Orsarh, E. S.This paper considers the problem of scheduling in flow-shop by Johnson's Algorithm method and Genetic Algorithm method to find an optimal sequence for n jobs m-machine based on minimum elapsed time. It has been shown that the method for finding an optimal sequence for n jobs, m-machine based on minimum make span using genetic algorithm provides a better result.Item Development of safety fuse plugs for use in the oil industry(Scholarlink Research Institute, 2011) Odior, A. O.; Oyawale, F. A.; Adeyemi, A. J.The safety plugs presently used on our equipment in the Nigerian industries are wholly imported. This research is aimed therefore at developing safety fuse plugs, using locally available materials that will compare favourably with the imported safety fuse plugs. Minerals from various mining sites in the country and laboratory samples were collected. Beneficiation processes were carried out on samples using foundry equipments which included electric furnace, tongs, and crucibles. Impure and beneficiated samples were mixed at various eutectic compositions to determine the effective mix that would meet specific temperature blowouts. A comparative test was carried out on imported and the developed samples. It was observed that there was no significant difference in the performances using the x2 test at p = 0.05. It was also discovered that the presence of impurities also affected the composition of the alloy as reflected by the ANOVA conducted on the different samples produced.Item Determining feasible solutions of a multicriteria assignment problem(World bank assisted National Agricultural Research Project (NARP)- University of Port Harcourt, 2010-03) Odior, A. O.; Charles-Owaba, O. E.; Oyawale, F. A.This paper presents an important research tool in operations research as it applies to a particular structure of the mullicritcria assignment problem. The paper addresses the problem of effectiveness of feasible solutions of a multicriteria assignment problem and this was done in two steps. In the first step, we determine whether or not a given feasible solution or a multicriteria assignment problem is a real efficient one. In the second step, if the feasible solution is not real efficient, we provide a real efficient solution that dominates that not real efficient solution, using our proposed method which consists of transforming the original problem into an assignment problem.Item Application of neuro-fuzzy models to grinding wheel parameters(Research India Publications, 2010) Odior, A. O.; Oyawale, F. A.Grinding is one of the most important finishing operations and it is very useful in our automobile industries. A grinding wheel is made of very small, sharp and hard abrasive particles or grits held together by strong porous bond. The paper presents, a control system for grinding process using neuro-fuzzy technique. The grinding parameters include circumferential speed of a grinding segment workpiece velocity and work depth of cut. The maximum grinding temperature is very important since too high temperature will lead to surface burns and thermal damage to the grinding wheel as well as the workpiece material. For fuzzy modeling, all the numerical values are replaced with linguistic values. The research work can be applied to any other grinding process, whether it is a wet or dry grinding process.Item A neuro-fuzzy linguistic approach to experimental parameters with silicon carbide grinding wheel(Nigerian Institution of Production Engineers, 2010-04) Odior, A. O.; Oyawale, F. A.; Charles-Owaba, O. E.The paper presents a control system for grinding process using fuzzy rule-based model for estimating the grinding conditions at which wheel wears occur. The grinding parameters include circumferential speed of a grinding segment workpiece velocity and work depth of cut using silicon carbride grinding wheels. There was a wide range of applications over many types of mild steel materials and variious wheel wear values were records for predicting the grinding conditions. Grinding wheels with various wheel hardness grades ranging from soft (H grade) to hard (R grade) and wide range of grit sizes, ranging from coarse to fine.