Browsing by Author "Ajao, K.R."
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Item Computer Application for the Maintenance Management of Hydropower Plant(National Centre for Hydropower Research and Development (NACHRED) and Energy Commission of Nigeria (ECN), 2010) Ajao, K.R.; Ajimotokan, H.A.Item Design, Fabrication and Performance Evaluation of Awning/Canopy for Thermal Comfortability(Journal of Engineering and Technology, 2017) Ajao, K.R.; Yahaya, T.; Kolawole, M.Y.; Aweda, J.O.This paper presents the design, fabrication and performance evaluation of retractable awning/canopy system for thermal comfortability. It consists of frame (mild steel bars), linear actuator, fabric (acrylic), adapter, roller pathways and photo sensor (for easiness of control). After fabrication and coupling of the whole components of the retractable awning and connecting to the adapter and power source for performance test evaluation, it was observed that, the actuator arm which was coupled to the fabric began projecting outward and once the photo sensor was shaded from sunlight using a dark material, the fabric retracted into the roller. Also it was noted that, shading the window provided a reduced solar heat gain factor of 28.16W as compared to the solar gain factor of 498.54 W before shading the window with a cooling load of 415.37 W achieved. This can be incorporated into a building plans especially those at the sun heating direction and temperature region to reduce inner temperature aid air-conditioner loading for longer life and efficient operation.Item Engineering Education and Sustainable Development in Nigeria(Department of Civil Engineering, University of Ilorin, 2019) Ajimotokan, H.A.; Ajao, K.R.; Adebiyi, K.A.; Dainkeh, A.; Oloyede, A.A.Item Evaluation of noise pollution and effects on workers during wheat processing.(Journal of Applied Science and Environmental Management (JASEM), Published by University of Port Harcourt, Nigeria., 2014) Ibrahim, I.B.; Aremu, A.S.; Ajao, K.R.; Ojelabi, A.T.ABSTRACT: This study assessed the intensity and likely effects of noise on workers during wheat processing. Noise measurements were taken using HD600 sound level meter. Subjective assessment of the effects of noise was undertaken using semi structured questionnaire. Also audiometric test was conducted on workers using AD229e diagnostic audiometer. The results of the study show that during wheat processing operations, the noise level in the factory ranges between 56.0 dB(A) and100.9 dB(A). Also, only 25.6 % of all the readings was below the specified limit of 85 dB(A). Workers are also observed to have certain forms of physiological and psychological disorders related to noise. The audiometric test results revealed that 33 % of the examined workers have defect in their left or right ear. Based on these results, WHO Class-5 hearing protector is recommended to be worn by workers in the processing sections while room acoustics should be upgraded to absorb some sounds transmitted to offices.Item Laser metal deposition of Titanium alloy: Effect of laser power on surface finish(Centrepoint Journal: Science Edition, 2015) Mahamood, M.R.; Abdulkareem, S.; Ajao, K.R.; Aweda, J.O.Item Optimization of Photovoltaic-Wind Hybrid System for Electrifying University of Ilorin E-Library(Faculty of Engineering and Technology, Adeleke University., 2021) Popoola, O. T.; Rabiu, A.B.; Ibrahim, H.K.; Ajao, K.R.; Bamigboye, J.T.; Idakwoji, I.T.The current paper presents the simulation of a PV-Generator-Wind hybrid power system to electrify University of Ilorin E-Library using HOMER (Hybrid Optimization of Multiple Energy Resources) software. Different performance analysis such as optimization and sensitivity is carried out by the software. Environmental and economic analysis is used to discuss the sustainability of the hybrid power system. Results from the analysis revealed that the hybrid system consisting of an 8.33 𝑘𝑊 photovoltaic (PV) panel, 6.5 𝑘𝑊 diesel generator, 6 kW wind turbine, a 6 𝑘𝑊 converter and 10 batteries is the optimal system in terms of Net Present Cost (NPC), Cost of Energy (COE), Initial Cost and Operating cost The system has NPC, COE. Initial Cost and Operating cost of US$58,404, US$0.358kWh, US$44,876 and US$1,046 respectively which is better than a diesel system which has a Net Present Cost of 𝑈𝑆$ 80,256 and a Cost of Energy of 0.492 𝑈𝑆$/𝑘𝑊ℎ𝑟. Results show that the hybrid system emits 2,104.35kg/yr of carbon dioxide (CO2), 5.19kg/yr of carbon monoxide (CO) and 4.23kg/yr of sulphur dioxide (SO2) while the diesel system emits 20,115.90kg/yr of CO2, 49.65kg/yr of CO and 40.40kg/yr of SO2. The emission of the hybrid system is an order of ten lower compared to diesel system indicating a lower greenhouse effect. Sensitivity analysis on diesel price and wind speed shows that with increasing diesel price, the NPC and COE the hybrid system increases whereas with increasing wind speed, 𝑁𝑃𝐶 and 𝐶𝑂𝐸 decreases. These results serve as a reference point for the design and installation of hybrid system for the building.Item Optimization of Photovoltaic-Wind Hybrid System for Electrifying University of Ilorin E-Library(Faculty of Engineering and Technology, Adeleke University, 2021) Popoola, O. T.; Rabiu, A.B.; Ibrahim, H.K.; Ajao, K.R.; Bamigboye, J.T.; Idakwoji, I.T.Item Scanning speed influence on the physical properties of laser metal deposition of titanium alloy(Nigerian Journal of Technology, 2017) Mahamood, R.M.; Aweda, J.O.; Ajao, K.R.; Abdulkareem, S.; Ajimotokan, H.A.