JOSHUA OLANREWAJU OLAOYE | University of Ilorin,Ilorin Nigeria (original) (raw)

Papers by JOSHUA OLANREWAJU OLAOYE

Journal of Energy Technologies and Policy, 2018

In a bid to optimize the performance of a Cross Flow Turbine designed and fabricated by Oyebode (... more In a bid to optimize the performance of a Cross Flow Turbine designed and fabricated by Oyebode (2014), the performance evaluation of the turbine at various conditions was carried out using a portion of the overflow from the University of Ilorin (UNILORIN) dam. The Dam has a net head of 4 m, flow rate of 0.017m 3 and hence theoretical hydropower energy of 668W. The turbine was tested and the optimized value of operating conditions namely; angle of inclination of the water jet (15 o above tangent, tangential and 15 o below tangent), height of water jet to impact point (200mm, 250mm and 300mm) and length of the water jet to impact point (50mm, 100mm and 150mm) were pre-set at their various levels while testing the Turbine. The measured outputs were Turbine Speed, Turbine Torque, Alternator Speed as well as the output voltage. The optimum values of the process output or measured parameters were determined statistically using a 3 3 X2 factorial experiment in three replicates. An optimum turbine speed of 330.09 rpm was achieved by pre-setting 250mm height to impact point, 100mm length to impact point and the water jet 15º below tangent. Same combination also yielded an optimum turbine torque of 39.07kNm. During loading (i.e. when the alternator becomes connected to the turbine), an optimum Turbine Speed of 197.66rpm was achieved by pre-setting 250mm height to impact point, 100mm length to impact point and the water jet 15º below tangent. Same combination also yielded an optimum Turbine Torque of 25.02kNm, optimum Alternator speed of 879.24rpm and an optimum output voltage of 4.05V. The results therefore show that the turbine must be set at these operational conditions for it to perform optimally.

Ethiopian Journal of Environmental Studies and Management, 2017

Social Science Research Network, 2021

IOSR journal of engineering, Sep 1, 2014

Investigation was carried out on the slope stability of lateritic soil due to effects of some geo... more Investigation was carried out on the slope stability of lateritic soil due to effects of some geotechnical properties in selected burrow pits in Akure, Ibadan, Ewekoro and Iperu areas, south western, Nigeria. The geotechnical properties were determined in accordance with American Society for Testing and Materials (ASTM) Standards. The conventional slope stability analysis was based on the linear Mohr-Coulomb failure criterion utilizing the notion of safety factors with respect to shear strength, where their average results of cohesion, angle of friction, bulk density and moisture content from the locations are 82 kPa, 18 degree, 1700 kg/m 3 , and 22 % respectively. The average specific gravity for locations was 2.73. The degree of permeability was very low except for location 6 in Ibadan area which is medium. The grain size distribution for the locations was classified into SC-SM (silt clayey sand). From compaction test, average moisture content, average wet density and dry density for the locations are 23 %, 1849 kg/m 3 and 1512 kg/m 3 respectively while the average compaction curve deduced 24 % optimum moisture contents and 1639 kg/m 3 maximum dry density. The Atterberg limits test results indicate that locations 1-5 were recorded as plastic soil while location 6 nonplastic soil. Also, the linear shrinkage degree of expansion for location 1-5 indicates critical while location 6 indicates non-critical. Finally, statistical mathematical model equations were developed. The factor of safety for locations 1-5 was satisfactory for routine extraction and loading operations while location 6 was unsafe due to loading conditions of the terrain.

International Journal of Agricultural Technology, 2018

Climate changes are growing environmental concerns which are much in the scientific government an... more Climate changes are growing environmental concerns which are much in the scientific government and public eye at present. The potential impact on aquatic resources and livelihood are immense. From local to global levels, fisheries and aquaculture play important roles for food supply, food security and income generation. Some 43.5 million people work directly in the sector, with the great majority in developing countries. Adding those who work in associated processing, marketing, distribution and supply industries, and the sector supports nearly 200 million livelihoods. Aquatic foods have high nutritional quality, contributing 20 percent or more of average per capita animal protein intake for more than 1.5 billion people, mostly from developing countries. They are also the most widely traded foodstuffs and are essential components of export earnings for many poorer countries. Extreme events will also impact on infrastructure, ranging from landing and farming sites to post-harvest facilities and transport routes. They will also affect safety at sea and settlements, with communities living in low-lying areas at particular risk. Livelihood diversification is an established means of risk transfer and reduction in the face of shocks, but reduced options for diversification will negatively affect livelihood outcomes.

Research in Agricultural Engineering

A combined roaster and oil expeller was developed with locally available and accessible materials... more A combined roaster and oil expeller was developed with locally available and accessible materials and the efficiency of the machine was evaluated. The obtained result shows that the efficiency of the machine is a function of the roasting temperature, the roasting duration, the moisture contents of the processed seeds and the machine feeding rate. The expeller is movable, simple in design for local fabrication, is easy to operate, requires few repairs and little maintenance and is cost effective. It is powered using a gear reduction electric motor of 5.5 Hp, the expeller has an average oil yield of 25.77% and an extraction efficiency of 70.26% and is designed to work for 8 hours per day of operation. The shaft diameter was designed to be 30 mm, while the roaster heater capacity was 2.8 kW. The designed machine is good for castor oil expression for both small- and medium-scale processing among rural and urban communities.

2020 IFEES World Engineering Education Forum - Global Engineering Deans Council (WEEF-GEDC)

The four modes of entry into Faculties of Engineering and Technology in Nigerian universities are... more The four modes of entry into Faculties of Engineering and Technology in Nigerian universities are: passing the Unified Tertiary Matriculation Examination (UTME) to gain admission into the first year of a five-year engineering degree programme; passing through a one year Remedial programme before coming in as first year students; Direct entry admission into the second year (200 Level) of the degree programme; and Direct entry admission into third year (300 Level). Data on the modes of entry and Cumulative Grade Point Average (CGPA) at the time of graduation obtained from the ten departments in Faculty of Engineering and Technology at University of Ilorin, for students who graduated in 2018/2019 session, were analysed. Out of the 471 students, 24 graduated with first class honours with 22 of them being UTME students and two being Remedial students. The number of UTME, Remedial, Direct Entry students at 200 Level, and Direct Entry students at 300 level were: 377, 66, 26, and 2 and the averages of their CGPA were: 3.58, 3.27, 3.60, and 3.52, respectively. There was statistically significant difference between the CGPAs of graduates who were admitted through UTME, Remedial and Direct Entry at 200 level. It is recommended that the admission quota of Direct Entry candidates be increased and the UTME candidates should continue to have the highest percentage of admission spaces.

JOURNAL OF AGRICULTURAL ENGINEERING AND TECHNOLOGY, Jun 1, 2020

Compression Ignition Engines have proved its usefulness in agriculture, transportation, and power... more Compression Ignition Engines have proved its usefulness in agriculture, transportation, and power sector. In this research, the physicochemical properties of different blends of castor biodiesel were compared with conventional diesel fuel. Samples of the castor biodiesel prepared using transesterification processwere blended with the conventional biodiesel in different mixed ratios, namely B5, B10, B15, B20, B25,B50 to B100. The physicochemical properties, including density, flash point and kinematic viscosity were determined following standard and international procedures (ASTM). Results show that the B100 has higher density, kinematic viscosity and flash point compared to the conventional diesel at 280 °C. But the calorific value was lower in comparison. A gradual decrease in the density, flash point and kinetic viscosity were observed with a decrease in the biodiesel blends from B100 to B5. This implies that the castor biodiesel can be used as a close substitute for the conventional diesel fuel and has substantial advantages, especially in area of greenhouse control and energy security.

Arid Zone Journal of Engineering, Technology and Environment, Sep 1, 2020

Arid Zone Journal of Engineering, Technology and Environment, 2017

Management of biomass waste is one of the problems faced in rural-urban area of developing countr... more Management of biomass waste is one of the problems faced in rural-urban area of developing countries. Engineering properties of biomass materials need to be evaluated in order to have design data for machines required for densification processes. This study was aimed at evaluating the constitutive conditions of densification of Sorghum stover. Selected physical and chemical properties of Sorghum stover were determined and the effects of constitutive conditions (particle size, moisture content, and pre heating temperature) on such parameters as stress at peak, strain at peak and energy at peak of Sorghum stover were studied. Relationship between process variables for densification process for the stover was established. A fabricated densification rig that consisted of a compression cylinder 32 mm diameter and110 mm height, and piston of 32 mm diameter and 250 mm length, was instrumented on a 300 kN UTM (Testometric SF-300-2041) combined with a temperature heating chamber (SIEMENS TLK...

European Mechanical Science, 2019

The performance of two micro hydro power turbines (Pelton Wheel and Cross Flow Turbines) were eva... more The performance of two micro hydro power turbines (Pelton Wheel and Cross Flow Turbines) were evaluated at the University of Ilorin (UNILORIN) dam. The Dam has a net head of 4 m, flow rate of 0.017m3 and theoretical hydropower energy of 668W. The two turbines were tested and the optimized value of operating conditions namely; angle of inclination (15o above tangent, tangential and 15o below tangent), height to impact point (200mm, 250mm and 300mm) and length to impact point (50mm, 100mm and 150mm) were pre-set at their various levels for both Turbines. The optimum values of the process output or measured parameters were determined statistically using a 33X2 factorial experiment in three replicates. An optimum Turbine speed (538.38rpm) in off load condition was achieved at 250mm height to impact point, 150mm length to impact point and angle at tangential inclination. Similar combination also yielded an optimum turbine torque of 46.16kNm for Pelton Wheel Turbine. For the Crossflow Tur...

IOP Conference Series: Materials Science and Engineering, 2019

In recent time, interest in energy generation from biological materials has been on the increase ... more In recent time, interest in energy generation from biological materials has been on the increase because of its environmental benefits. The use of these waste materials as feedstock in energy generation plants has been used in many industrial processes. The availability of these wastes is key to the sustainability of such a process. Resource assessment is an important step for planning and implementation of any energy workflow. This research studied the quantity of crop residues generated from farming of some crops in Kwara State and the potential energy contents inherent in them which when properly harnessed can help to alleviate the energy challenge in the state. The crops investigated were rice, maize, sorghum, soybean, and sugar cane. Relevant data were collected by visiting major farm establishments in the state and also the Ministry of Agriculture and Natural Resources (MANR). Obtained production outputs for two farming seasons were analysed using the corresponding residue-to-...

Croatian Journal of Food Science and Technology, 2018