Browsing by Author "Ikubanni, PP"

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    Development of U-Channel Screw Jack for Vegetable Oil Extraction
    (Faculty of Engineering, University of Nigeria, Nsukka, 2017) Odewole, MM; Sunmonu, MO; Oyeniyi, SK; Adesoye, OA; Ikubanni, PP
    A U-channel screw jack for extracting vegetable oil was developed through design (with Solid works–Computer Aided Design (CAD)) and fabrication processes. A factorial experiment in a Randomized Complete Block Design (RCBD) was used to investigate the effect of heating temperature (50, 60 and 70°C) and heating time (5 and 10 min) on the performance of the machine in terms of oil yield, extraction efficiency and extraction loss with groundnut as the feedstock. Results of the machine design for some of the machine components gave the following values: U-channel structural frame made of mild steel (80 x 160 x 650 mm), compression cap ( 70 mm) and heater band(3.5kW). Also, the performance evaluation of the machine showed that increase in heating temperature (50 to 70°C) and heating time (5 to 10 min) did not cause the oil yield, extraction efficiency and extraction loss to increase beyond 30%, 48% and 15% respectively. Generally, decrease in oil yield, extraction efficiency and extraction loss occurred at the heating temperature of 70oC irrespective of the heating time. For future works, other machine and feedstock factors should be incorporated into the performance evaluation process. Also, automation of the machine is recommended.
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    Energy and exergy analyses of convective drying of green bell pepper in a cabinet tray dryer
    (Agricultural Biosystems Engineering International: CIGR, 2020) Odewole, MM; Ikubanni, PP; Falua, KJ; Oyeniyi, SK
    This paper presents Computational Fluid Dynamics (CFD) in the drying process of green bell pepper in a cabinet tray dryer using three drying temperatures (50 °C, 55 °C and 60 °C). Engineering simulation software ANSYS 14.5 was used to simulate the model of the dryer in 2 Dimensional (2D). The ANSYS Design Modeler modeled the 2D representation of the dryer and ANSYS ICEM was used for mesh analysis. Thereafter, the derived data from the simulation was used in the calculation of the energy and exergy analyses of the dryer based on the thermal efficiency with respect to the varied drying temperatures in order to assess the performance of the system in terms of energy utilization (EU), energy utilization ratio (EUR), energy efficiency, exergy inflow and outflow, exergy loss and exergetic efficiency. The results indicated that EU and EUR decreased from 0.02401 to 0.01975 J s-1 and 0.01441 to 0.00299 respectively as the drying air temperature increased from 50 to 60 °C. Energy efficiency decreased from 0.196% to 0.115%. Exergetic efficiency increased with increase in drying air temperature from 0.9903% to 0.9928%. Model equations that could be used to express the energy and exergy parameters as a function of drying temperature were established from this study.