Muyiwa S. Adaramola

Analysis of wind speed data and wind energy potential in three selected locations in south-east Nigeria

In this study, the wind speed characteristics and energy potential in three selected locations in the southeastern part of Nigeria were investigated using wind speed data that span between 24 and 37 years and measured at a height of 10 m. It was shown that the annual mean wind speed at a height of 10 m for Enugu, Owerri and Onitsha are 5.42, 3.36 and 3.59 m/s, respectively, while the annual mean power densities are 96.98, 23.23 and 28.34 W/m2, respectively. It was further shown that the mean annual value of the most probable wind speed are 5.47, 3.72 and 3.50 m/s for Enugu, Owerri and Onitsha, respectively, while the respective annual value of the wind speed carrying maximum energy are 6.48, 4.33 and 3.90 m/s. The performance of selected commercial wind turbine models (with rated power between 50 and 1,000 kW) designed for electricity generation and a windmill (rated power, 0.36 kW) for water pumping located in these sites was examined. The annual energy output and capacity factor for these turbines, as well as the water produced by the windmill, were determined. The minimum required design parameters for a wind turbine to be a viable option for electricity generation in each location are also suggested.

ECONOMIC ANALYSIS OF WIND ENERGY CONVERSION SYSTEMS USING LEVELIZED COST OF ELECTRICITY AND PRESENT VALUE COST METHODS IN NIGERIA

Technical electricity generation assessment and economic analysis of six wind energy conversion systems in the categories small, medium, and large (with power ratings of 20, 35, 275, 500, 1,000, and 2,000 kW) were examined in this study. Electricity cost values were estimated based on the levelized cost of electricity (LCOE) and present value cost (PVC) methods for six locations selected across all the geopolitical zones of Nigeria. This was done using wind speed data that span between 25 and 37 years, measured at the height of 10 m. The result showed that the annual average energy output ranges from 2.242 MW h in Uyo with P10-20 turbine to 12,521.55 MW h in Kano using Vestas V80-2 MW wind turbine. Furthermore, of all the selected sites, Kano gave the least costs of electricity production per kilowatt hour with Vestas V80-2 MW model at 67-m hub heights, while the highest is obtained in Uyo with GEV-HP (1 MW) model at 70-m hub heights for the LCOE and PVC height for both the LCOE and PVC methods. In addition, sensitivity of the selected parameters to the levelized cost of electricity was also carried out.

Economic Assessment of Water Pumping Systems Using Wind Energy Conversion Systems in the Southern Part of Nigeria

This study assessed the wind energy potential and the economic viability of the water pumping systems supplied by various wind turbine models. The two-parameter Weibull probability density function was employed to analyze the wind speed data collected between 1971 and 2007 by the Nigerian Meteorological Agency for seven meteorological stations, in the southern part of Nigeria, namely Asaba, Calabar, Ogoja, P-Harcourt, Uyo, Benin-City, and Warri. The performance of small to medium size commercial wind turbine models of various rated powers ranging from 5.2 kW to 250 kW were investigated and economic evaluation of the wind energy in all the sites was performed using the levelised cost method. The results showed that the annual mean wind speeds range from 3.09 m/s at Warri to 4.15 m/s at Calabar, while the corresponding annual mean power densities vary from 23.17 W/m2 to 56.22 W/m2. Our analysis demonstrated that the wind resource in all the sites considered fall into Class 1 wind resource category, hence, they can marginally be considered for small scale standalone system for electricity generation. The cost of energy production per kWh for the selected sites varies between

Technical and economic assessment of hybrid energy systems in South-West Nigeria

0.090 at Ogoja and

Experimental investigation of wake effects on wind turbine performance

2.118 at Uyo. Moreover, the cost of water delivered varies from

Assessment of electricity generation and energy cost of wind energy conversion systems in north-central Nigeria

3.33 per cubic metres in Calabar to

Estimating global solar radiation using common meteorological data in Akure, Nigeria

54.96 per cubic metres in Uyo.

Performance and near wake measurements of a model horizontal axis wind turbine

The technical and economic assessment of using hybrid energy system for electricity generation in rural communities in the south-west of Nigeria is investigated in this study. Renewable resources (wind and solar data) in Ibadan located on the latitude of 7.43 °N and longitude 3.91 °E are used. Hybrid Optimization Model for Electric Renewable software has been employed to carry out the present study. It was found that Wind-PV-Generator-Battery hybrid system is most suitable option as stand-alone electricity generating system in Ibadan. The optimal simulation results indicate that the levelised cost of energy for this hybrid energy system varies between

Wind energy evaluation for electricity generation using WECS in seven selected locations in Nigeria

0.437/kWh and

Evaluating the performance of wind turbines in selected locations in Oyo state, Nigeria

0.606/kWh depending on the diesel price. These costs are significantly lower than the cost of using diesel generator only (without battery) which varies between