Browsing by Author "Adesoye, OA"
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Item Computational Fluid Dynamics (CFD) Simulation of Hot Air Flow Pattern in Cabinet Drying of Osmo-Pretreated Green Bell Pepper(Federal University of Technology Minna, Nigeria, 2017) Odewole, MM; Sunmonu, MO; Oyeniyi, SK; Adesoye, OAComputational Fluid Dynamics simulation of air flow distribution, air velocity and pressure field pattern as it will affect moisture transient in a cabinet tray dryer is performed using SolidWorks Flow Simulation (SWFS) 2014 SP 4.0 program. The model used for the drying process in this experiment was designed with Solid Works 2014 SP4.0 while the simulation was performed using SWFS 2014 program using the standard turbulence Intensity-Length model in steady-state regime. The effects of the model were used to analyze the flow parameters and it was observed that fluid density vary along the distance of travel. The average air temperature gotten in the process of the Computational Fluid Dynamics (CFD) simulation was in agreement with the experimental preset temperature for drying green bell pepper with an error of 0.02 %. The dryer model describes the transfer process and flow field pattern of air in the drying chamber and predicts the instantaneous temperature, air velocity, pressure field pattern at any location of the dryer with emphasis on the drying trays. The R-squared values of drying parameters as they vary with distance of travel along the trays were presented in order to know the relationship of these parameters with the dryer setup.Item Determination of Selected Physical Properties of Fluted Pumpkin Seed (Telfairia Occidentalis) Related to Machine Design(University of Ilorin, Nigeria, 2016) Odewole, MM; Adesoye, OA; Adeyinka-Ajiboye, O; Shadare, OASome engineering parameters needed in the form of physical properties of fluted pumpkin seed to design, construct and analyse processing, storage and handling machines/facilities are not readily available. Therefore, this study was done to determine the following physical properties of the seed for three different varieties: size (major diameter, intermediate diameter and minor diameter), mass, surface area, volume, density and geometric mean diameter. Mature pods (13 weeks old) were procured from the National Horticultural Research Institute (NIHORT) Ibadan, Nigeria and were classified as NHTo-1, NHTo-2 and NHTo-3 by NIHORT. One hundred (100) seed samples were selected from each variety after sun drying to an average moisture content of 67.734% (wb). In summary, the following range of mean values (± standard deviation) of results were obtained: major diameter (29.968 ± 2.146 mm – 37.320 ± 2.867 mm); intermediate diameter (9.184 ± 2.061 mm – 31.020 ± 3.892 mm); minor diameter (5.421 ± 3.757 mm – 37.156 ± 2.859 mm); mass (0.992 ± 0.236 g -7.870 ± 1.318g); volume (4.400 ± 1.653 mm³- 8.399 ± 0.600 mm³) x ); density (0.136 ± 0.125 g/mm³- 2.010 ± 0. 827 g/mm³) x ); surface area (1013.16 ± 534.552 mm2 – 1584.788 ± 197.61 mm2), and geometric mean diameter (22.267 ± 1.402- 25.359 ± 2.873 mm). The values of physical properties obtained are relevant in designing machines for the handling, processing, packaging and storage of fluted pumpkin seeds.Item Determination of Some Mechanical Properties of Ugu Seed (Telfairia occidentalis) in Relation to the Design of Cracking Machine.(Wollega University, Ethiopia, 2015) Odewole, MM; Adesoye, OA; Shadare, OAUgu (Telfairia occidentalis) seeds contain valuable Before the oil can be extracted, it has to pass through some processes like depoding, size reduction, cracking etc. The parameters needed in form of seed to design and construct the processing, storage and handling equipment are not readily available. Therefore, this study was done to determine the following mechanical properties; force at break, energy to break, strain at varieties of seeds (NHTo-1, NHTo-2 and NHTo Research (NIHORT) Institute Ibadan, Nigeria were used. 50 samples from each variety were selected at moisture content 67.734% (wb) and use (Testometric M500-100AT, 100kN) was used to determine all the mechanical properties. Result showed that the range of mean values at different orientations of diameters were as stated in the brackets: on the major diameter, for 224.857±129.892N); energy at break (0.097±0.044Nm to 0.526± (2.209±0.841% to 11.079±6.672%) and stress at break (0.133± 0.837 N/mm²). On the intermediate diameter, th to 2043.857±1050,785 N), the energy at break was (0.520±0.054 Nm to 2.604± Nm), the strain at break was (3.739 ±1.345% to 35.069± (0.225±0.111 N/mm² to 2.040±0.964 N/mm²). On the minor diameter, t was (53.500± 47.964 N to 363.857±107.606 Nm to 1.040 ± 0.548 Nm), the strain at break was (1.909± the stress at break was (0.412±0.421 N/mm gave the best crack and did least damage to the kernel on the minor diameter with the mean values of force at break of 53.500±47.964 N.Item Development and Performance Evaluation of Fluted Pumpkin Seed Dehulling Machine(Faculty of Engineering, University of Maiduguri, Nigeria, 2015) Odewole, MM; Adesoye, OA; Oyeniyi, SK; Isiaka, AOA machine for dehulling fluted pumpkin seed (Telfairia occidentalis) was developed. The main objective of developing the machine was to provide a better substitute to traditional methods of dehulling the seed which contains edible oil of high medicinal and nutritional values. Traditional methods are full of drudgery, slow, injury prone and would lead to low and poor outputs in terms of quantity and quality of dehulled products. The machine is made of five major parts: the feed hopper (for holding the seeds to be dehulled before getting into the dehulling chamber), dehulling chamber (the part of the machine that impacts forces on seeds thereby causing fractures and opening of seeds coats for the delivery of the oily kernels), discharge unit (exit for oily kernels and seed coats afterdehulling), the frame (for structural support and stability of all parts of the machine) and electric motor (power source of the machine). The development process involved design of major components (shaft diameter (20 mm), machine velocity (7.59 m/s), power requirement (3hp single phase electric motor) and structural support of mild steel angle iron), selection of construction materials and fabrication. ANSYS R14.5 machine design computer software was used to design the shaft and structural support; while other components were designed with conventional design method of using design equations. The machine works on the principle of centrifugal and impact forces. Performance evaluation was carried out after fabrication and 87.26%, 2.83g/s, 8.9% and 3.84%were obtained for dehulling efficiency, throughput capacity, percentage partially dehulled and percentage undehulled respectively.Item 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, PPA 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.