Master of Science (M.Sc.) Theses and Dissertations

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Browsing Master of Science (M.Sc.) Theses and Dissertations by Title

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    Open Access
    An Appraisal of GSM Telecommunications services delivery in Lagos and Oyo state of Nigeria.
    (Department of Technology Management, Faculty of Technology, Obafemi Awolowo University, 2008) Abdul-hammed, Taofeek Adekune
    The study appraised the quality, volume, and capacity of the telecommunication facilities of the GSM service providers in Lagos and Oyo States of Nigeria. This was to develop strategies for improved service delivery in the industry.
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    Open Access
    Development of a microcontroller-based integration of renewable energy sources for implementation of a hybrid power supply system.
    (Department of Electronic and Electrical Enigneering, Faculty of Technology, Obafemi Awolowo University., 2023) SAMSON Joseph Bukola
    This study determined the appropriate size for each of the renewable energy sources (RES) to be integrated, developed a microcontroller-based system capable of coordinating and monitoring the energy output power flow of the sources, and simulated and evaluated the performances of the system. This was done with a view to providing a sustainable solution for electrification of areas not connected to main power grid. The wind speed, solar radiation and load demand data of the study site were obtained from Obafemi Awolowo University, Ile-Ife and then averaged into 1-hour intervals for different geographical seasons. The sequential quadratic programming (SQP) approach was used in the study to determine appropriate and economically viable sizes for the integrated energy systems. The SQP approach was used in the study to find optimal and cost-effective sizes for integrated energy systems that meet the specified requirements. Suitable mathematical models, and size optimization were obtained for the system’s components. Using MATLAB (version 2021a), a microcontroller algorithm for optimal power flow in a hybrid renewable energy source (HRES) was both developed and simulated. For the HRES cost analysis, the overall installation cost and cost per kW of each component were estimated, and three different optimal configurations for the site location were compared for techno-economic analysis. The results show that an off-grid energy system based on RES, with biogas backup, is feasible in the examined location. According to the simulation results, renewable energy (RE) contributes 51.4 % of total load demand in December during the academic period of the weekdays and 96.4 % of total load demand over the weekends of the same period in June. The energy contribution from RES from storage facilities ranged between 20.1 % and 44.0 % of total load demand. Among the three different configurations viz wind/PV/pumped-hydro/battery/biogas, PV/wind/battery, and wind/pumped- hydro/biogas, as examined in this work, wind/PV/pumped-hydro/battery/biogas is discovered to be the most cost-effective configuration with Net Present Cost and Levelised Cost of Energy of $3,085,675 and 0.027 $/kW respectively. The optimal and most cost-effective solution proposed configurations consist of 500 kW of PV system, 400 kW wind turbine. In conclusion, the study showed that implementing an off-grid HRES with sufficient storage, utilizing the pumped-hydro storage system, can provide a sustainable solution for electrification of once not connected to the grid.
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    Open Access
    Techno- Economic analysis of small hydropower development in Southwestern Nigeria.
    (Depatment of Technology management, Faculty of Technology, Obafemi Awolowo University., 2014) Abe Oloruntoba Williams
    The study identified the available dams and assessed the barriers to small hydropower plant systems in southwestern Nigeria, surveyed available technologies for small hydropower plant production of electrical energy and assessed the engineering economics and human capability of small hydropower plant.
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    Open Access
    Techno-Economic assessment of off grid Hydrokinetic Power infrastructure for urban residential development initiatives in Calabar, Cross River State
    (Faculty of Technology, Obafemi Awolowo University, 2024) Leonard Unimke UGI
    This study determined the electricity demand for urban residential development initiatives in Calabar, Cross River State, established the technological specifications for hydrokinetic power development for the urban residential development initiatives and assessed the economic viability of the hydrokinetic power infrastructure. These were with a view to promoting the adoption of hydrokinetic power infrastructure needed for the urban residents in Calabar, Cross River State, Nigeria. The study was carried out in three different selected urban residential areas, electricity audits of the selected urban residential development initiatives was carried out to obtain their power loads and total time of use. The data obtained was used to determine the electricity loads and energy demand. The obtained results served as the benchmarks for the design of the hydrokinetic power infrastructure. Data on technological specifications for the development of the hydrokinetic power infrastructure was obtained from journal articles and reports of the Cross River Urban-Rural Authority. The information obtained included the location coordinates, the lengths and widths of the river, and the river flow velocity. The specific location with its coordinates was mapped out using geographical positioning system (GPS). Information on appropriate turbine specifications and allied electrical components such as transformers came from equipment vendors and literature. Technological specifications for an alternate diesel power generation and CO2 emission savings were elicited from the International Energy Agency (IEA). The data obtained was analysed using energy planning and foresight analyses methodology. The economic viability of the hydrokinetic power infrastructure was determined using capital and operations costs, interest rates, and project time duration amongst others. The data obtained was analysed using life cycle and engineering economy analyses. The results showed that 815 housing units in the selected area had 9.2 MW power load demand with projected energy consumption of 51.8 MWh/day. The hydroquest turbine was found to be most suitable for the extraction of hydrokinetic power from the Calabar River. From the design calculations, 128 numbers of the suitable turbine (80kW hydroquest 2.80) were needed to produce the said electricity demand of 9.2 MW. The hydrokinetic requires a total investment cost of forty-one billion, nine hundred and three million four hundred and fifty naira (₦41,903.45 ×106). The investment required an annual operating cost of four billion five hundred and twelve million two hundred thousand (₦4,512.20 ×106). The levelized cost of HKP-based electricity was found to be ₦68.99/kWh at present. Subsequently, the levelized cost of HKP-based electricity for the first year of operation was ₦82.79/kWh. The estimated minimum revenue for the HKP-based electricity project was six billion five hundred and twenty-six million naira only (₦6,526.00×106) leading to investment recovery on the 7th year of 25 years life cycle of the project. The result also indicated that 528 metric tons of CO2 can be saved from the atmosphere over the 25 years life cycle of the project. The study concluded that, the establishment and development of hydrokinetic power plant in Calabar is technologically and economically viable.