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Articles by Y.K. Sanusi
Total Records ( 3 ) for Y.K. Sanusi
  J.A. Amusan , Y.K. Sanusi and G. R. Fajinmi
  Annual mean wind speed in Ogbomoso was calculated to be 127.517ms 1 through the monthly wind speed and direction data collected for 5 years from Nigeria Meteorological Agency (NIMET), Ilorin. The data were collected from Ilorin (Lattitude 80321 N and Longitude 40341E), which is very close to Ogbomoso (Latitude 80051 S and Longitude 40121 W). The determined annual mean wind speed was then applied in the Weibull Probability distribution function using c++ Programming Language. Weibull Probability distribution of 1.303010-54 at sea level is obtained which shows the wind speed variation over the period and thus indicates the probability distribution of annual mean wind speed being 127.517ms 1. Digital Data Logger is employed to compute the power potential for wind turbine. The annual energy capture potential of 5562.69MJ is obtained for wind power system. The obtained equivalent power potential of 635.01kW is a considerable amount when compared with power consumption of 956.25kW utilized in Ladoke Akintola University of Technology, Ogbomoso. We then realize that the annual energy capture potential for a single wind turbine is 66.4% of the power consumption in LAUTECH through conventional energy source.
  J.A. Amusan , G.R. Fajinmi and Y.K. Sanusi
  Lead Sulphide (PbS) thin films were deposited on glass substrates using chemical bath deposition technique. The prepared PbS samples were grouped into two: The `as-grown`` and the ``annealed`` samples. We deposited our PbS samples, both as-grown and annealed, at various deposition time of 3, 4 and 5 (i.e 3, 4, 5 h for as-grown, 3, 4, 5 h samples annealed at 100C, 3, 4, 5 h samples annealed at 150C and 3, 4, 5 h samples annealed at 200C. Absorbance of each sample was measured and recorded at various wavelengths using Visible/Ultra-violet Spectro-photometer model 6405. The result shows non-linear relationship between the deposition time and absorbance of chemically deposited PbS thin film. Absorptivity increases in the initial process of growth with deposition time but beyond a specific time, the absorbance decreases as deposition time increases. The optimum absorptivity of the PbS samples occurs at a specific deposition time after which the absorptivity decreases as deposition time increases. This optimum absorptivity is obtained between 220 and 250 min deposition time after which the absorptivity decreases with further increase in deposition time for all samples under investigation. Thus, the optical and electrical properties of PbS thin film are deposition time dependent.
  J.A. Amusan , G.R. Fajinmi , Y.K. Sanusi and S.A. Okewoye
  Chemical Bath Deposition (CBD) technique is employed in depositing prepared Lead Sulphide (PbS) as thin film on glass substrates at varied deposition time. The durations of our deposition are 180, 240 and 300 min. We annealed some prepared samples at 100, 150 and 200C so as to modify their grain boundaries and the remaining samples were left, as they were prepared. The `as prepared` and `annealed` PbS samples are then studied. We measured and recorded the transmittance of each sample at various wavelengths between 400 and 1000 nm using Visible/Ultra-violet Spectro-photometer model, 6405. The effect of deposition time on transmissivity of Lead sulphide is observed. The result shows non-linear relationship between the deposition time and transmissivity of PbS sample. The deposition time of `as prepared` PbS samples increases as transmissivity increases up to an optimum point of transmissivity between 230 and 240 min after which the transmissivity nearly remains constant with further increase in deposition time. The annealed samples initially show increase in transmissiviy with an increasing deposition time but beyond a specific time, termed `critical deposition time`, the transmittance decreases as deposition time increases. Thus, the optimum transmissivity of annealed PbS thin film occurs at this `critical deposition time` (between 235 and 245 min) beyond which the transmittance decreases with further increase in deposition time. Hence, the deposition time is then considered to have great influence on the transmissivity of chemically deposited Lead Sulphide (PbS) thin film and thus influence its electrical and optical characterization.
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