Mechanical Engineering

Permanent URI for this collectionhttp://197.211.34.35:4000/handle/123456789/153

Mechanical Engineering

Browse

End date: 2019

Search Results

Now showing 1 - 5 of 5
  • No Thumbnail Available
    Item
    Production of Biogas from Chicken and Goat Wastes
    (2019) N. W. Okafor, O. Adedipe, F. J. Usman, J. Y. Jiya, and R. O. Mamman.
    One of the problems facing the world today is waste management, particularly those generated from animals. Examples of such wastes include goat waste and chicken droppings. This paper presents the performance evaluation of five 32 litre capacity biogas digesters that were used to investigate the anaerobic digestion of chicken and goat wastes. Biogas was produced from chicken and goat wastes with different mixing ratios: 100:0 (Sample I), 30:70 (Sample II), 70:30 (Sample III), 50:50 (Sample IV) and 0:100 (Sample V) from digesters 1, 2, 3, 4 and 5 respectively. The digesters were charged differently with these wastes and the mesophilic ambient temperature range attained during the experiment were 26-38 oC and a slurry temperature of 25-32 oC. The result showed that the samples were capable of producing a total of 17.3, 44.3, 74.3, 86.2 and 113.2 litres of biogas respectively, using the 32 litre capacity digesters for 30 days. The result obtained from the gas production showed that sample IV produced the highest methane content of 63.3% followed by sample III with 59.4% and sample II with 59.2%. Sample I produced a methane content of 59.1% while sample V had the least methane content of 57.3%.
  • No Thumbnail Available
    Item
    SECURITY MANAGEMENT: THE ENGINEERING PERSPECTIVE
    (IEC, 2015) H. U. Ogboo; A. Nasir; J. Y. Jiya; H. T. Abdulkarim
    Security management is a difficult task as everyone agrees that security is a problem. As such, this work aims at addressing the ever increasing security challenge confronting us as individuals from the engineering perspective. Throughout human history, engineering has driven the advance of civilization. This can be seen from the metallurgists who ended the Stone Age to the shipbuilders who united the world’s people through travels and trades; the past witnessed many marvels of engineering prowess. As civilization grew, it became pertinent that the world became confronted with the challenge of survival and relevance and hence, the desire not to be cut out from the basic necessities of life and existence gave rise to devices by humanity to remain relevance and hence, the field of engineering owes it a responsibility to the world to see that this issue is sorted out as usual as it has always provided respite to the world.
  • No Thumbnail Available
    Item
    Effect of Cutting Speed and Feed Rate on Tool Wear Rate and Surface Roughness in Lathe Turning Process
    (International Journal of Engineering Trends and Technology (IJETT), 2015) O. A. Olugboji; M. S. Abolarin; J. Y. Jiya; S. O. Popoola; C. K. Ajani
    Machining is a vital part of the production process in the manufacturing industries. Turing operation was carried out on the mild steel to produce shaft of various diameters. The conditions applied during the turning operation include varying the cutting speed and feed rate while keeping other cutting variables like depth of cut constant. The results affirms that an increase in the cutting speed causes a decrease in the tool life, increase in the feed rate also affects the surface finish obtained.
  • No Thumbnail Available
    Item
    Development of a Test Rig for the Determination of Headloss and Friction Factor of Polyvinyl Chloride (PVC) Pipes
    (Journal of Energy Technologies and Policy, 2016) N. A. Musa; J. Y. Jiya; T. K. Aderoju
    This paper reports the design, construction and performance evaluation of a test rig for determining the head loss and friction factor of PVC pipes of different diameters (13mm, 19mm and 25mm) transporting water. On performance evaluation, friction factors of 0.0121, 0.0396 , 0.0171 and head losses of 37.8mm, 25.2mm and 12.6mm for 13mm, 19mm, and 25mm diameter PVC pipes respectively were obtained. Keywords: Head loss, friction factor, PVC pipes, test rig, water
  • No Thumbnail Available
    Item
    Thermal Stability, Transparency, and Water Sensitivity Properties of Bleached, Cross-Linked Cassava Starch Film
    (Journal of Digital Food, Energy ans Water Systems (JD-FEWS), 0024) J. Y. JIYA; M. ABUBAKAR; I. A. JOSEPH; E. C. EGWIM; K. T. OBANIMOMO
    This work investigates a novel study of the effect of bleaching and cross-linking cassava starch film. Native cassava starch was bleached with hydrogen peroxide (H2O2), cross-linking was carried out with oxidized sucrose, while glycerol was added to enhance the plasticity of the film. Operating temperature and time of 90 °C and 10 Minutes, respectively, adding 0.5 ml of glycerol gave the best bleached, cross-linked cassava starch film. UV-visible spectrophotometer analysis revealed that the cassava starch film produced at the above reaction conditions retained 88.2 % of its transparency at 96 hours of water immersion. The water solubility test shows that the film experienced 52.02 % weight loss after 96 hours of immersion in water. The thermo-gravimetric analysis (TGA) shows a significant improvement in the thermal stability with a Temperature peak (Tp) of 420.75 °C, compared to 374.13°C Tp of the control sample (unbleached, uncross-linked) of the cassava starch film.