Browsing by Author "Okegbile, .O. J."

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Development and Testing of a Heat Dissipation System Using Fins for a Motorcycle Exhaust Pipe
(Nigerian Journal of Engineering Science Research (NIJESR), 2022-12-30) Okegbile, .O. J.; Oboakporhorho, .J. J.; Bori Ige; Babawuya, .A.; Bako, .S.; Musa, .N. A.
The paper developed and investigate the use of fins as heat exchanger in dissipation of heat that arise from motorcycle exhaust pipe which can result in variety of degree of burns, affecting both users and passengers when in accidental contact with it. In this research work, copper pipe and aluminum fins were used because the heat transfer rate needs to be improved. The fabrication of the fins array was carried out with the use of 1mm aluminum material and 4mm copper pipe the base plate, the fins array are very potable and may be unfastened used on other exhaust pipes, since the fins are assembled with bolts and nuts. The analysis shows that the rate of heat transfer from the exhaust pipe (without fins) is1078W, while the heat transfer from the fins array was 2692.3W; which shows an increase in exhaust pipe heat transfer by factor of 2.5. Therefore, the risk of contacting serious burn when in accidental contact with the exhaust pipe has been reduced. It is hereby recommended that, the Semi rectangular fins profile can also be used for further research work because they are also effective, and the Copper fin may be considered for further work due to excellent thermal conductivity of the material.
Development of Screw-Type Briquetting Machine for Municipal Solid Waste
(2nd International Engineering Conference (IEC 2017) Federal University of Technology, Minna, Nigeria, 2017-10-17) Okegbile, .O. J.; Bori Ige; Danlami, .S. M.
The Hydra headed problem of deforestation and Municipal Solid Waste (MSW) Management has bedeviled Nigerian States. Deforestation has put Nigeria on the world’s map as the highest contributor to the world’s deforestation of its primary forest (contributing over 50%), as over 70% of its population depends on firewood and charcoal for cooking and heating. The rising profile of MSW, characterized by inefficient management methods make most Nigerian cities an eye sore, with uncollected waste littering almost every available space, drainages and water channels which poses great danger to human existence. Without alternative energy source available to the growing population, deforestation will continue unabated and in the nearest future Nigeria risk losing all of its forest resource. A Screw-Type briquetting machine was developed that utilizes crushed, combustible MSW to form briquettes to be used for cooking and heating, which is using one problem to fix another. MSW was formulated, crushed and used to form briquette. The briquettes produced burn in similar way to charcoal when compared. This will reduce to the barest minimum, deforestation rate and improve the management of MSW by utilizing as a resource what is termed waste. The developed machine has a throughput capacity of 2605.4Kg/hr and is driven by a 5 Horsepower (5 hp) electric motor.
Enhancing the Cavitation Erosion Resistance of 304 Stainless Steel by Laser Surface Alloying with Molybdenum
(Nigeria Journal of Engineering and Applied Sciences (NJEAS), FUT Minna, 2017-08-24) Bori Ige; Muriana, .R. A.; Man, .H. C.; Okegbile, .O. J.; Ayo, .S. A.; Babawuya, .A.
Type 304 stainless steel is the most versatile and widely used austenitic stainless steel, it accounts for more than 50% of all stainless steel produced. It is commonly used in liquidhandling equipment, house hold utensils and lot of applications in almost every industry. However, poor surface properties in terms of wear resistance, due to its low hardness made it susceptible to cavitation erosion, which is a usual mode of degradation of engineering parts in contact with fast-flowing or vibrating liquids. This work is an attempt to improve the cavitation erosion resistance of 304 stainless steel by laser surface alloying with Molybdenum (Mo). This was made possible by using a 2kW continuous wave Nd-YAG laser. The alloying powder was placed in advance on the surface of the substrate by pasting to a thickness of 0.1mm, followed by laser beam scanning at an optimal speed of 20 mm/s and 30 mm/s (each at a beam diameter of 3mm) and a laser power of 1.2kW, in order to achieve surface alloying and modified surfaces were obtained by 50% overlapping of adjacent tracks. The microstructure and composition of modified layer were also studied for more insights. Ultrasonic induced vibrator tester was used to carry out cavitation erosion test. Cavitation erosion resistance (Re) was observed to have increased with the Mo content in the alloyed layer, the Re of the specimens modified with Mo was improved by a factor of 1.4 (for v = 20 mm/s) and 1.5 (for v = 30 mm/s), when compared with that of the as-received 304 stainless steel substrates.