Wind speed pattern in Nigeria (a case study of some coastal and inland areas)

J.A Oyewole,T.O Aro

doi:10.4314/jasem.v22i1.22

Abstract

In this study, wind speeds were analysed using the daily wind data obtained from Nigeria Meteorological Agency, Oshodi Lagos at the height of 10m at the different stations during the period of 2000-2010. Weibull , lognormal and normal probability density functions were employed. It was found that the daily mean wind speed groups and percentage frequency of occurrence in brackets in the inland locations (Jos, Kano, and Ilorin) and in the coastal locations (Lagos, and Port Harcourt) ranged from (13-18) ms -1 (70.6%), (8-12)ms -1 (84.4%), (45)ms -1 (67%) and (8-12)ms -1 75.8% to (4-7)ms -1 97% of the observations respectively. Weibull shape parameters K ranged from 3.07 to 3.82. While the scale parameter C ranged from 9.91 to 15.07ms -1 for Kano; K ranged from 2.75 to 4.04 while C ranged from 12.75 to 17.44ms -1 for Jos; K ranged from 2.61 to 2.76 while C ranged from 10.58 to 10.79ms -1 for Lagos; K ranged from 1.95 to 1.98 while C ranged from 6.10 to 6.35ms -1 for Port Harcourt; and K ranged from 3.10 -5.60 while C ranged from 3.80 to 6.00ms -1 for Ilorin. Keywords: Weibull, Ikeja, Jos, Kano and Port Harcourt

Highlights

Nigeria is a country whose energy demand exceeds supply from the national utility
Due to accessibility to wind speed data information, some researchers reported wind speed data in one city (e.g. Medugu and Malgwi, 2005; Ngala et al, 2007; Oriaku et al, 2007; Fadare, 2008) while others reported wind speed data across the country (e.g. Fagbenle et al, 1980; Ojosu and Salawu, 1990a, b; Fadare, 2010; Okeniyi et al, 2015; Aliyu and Mohammed, 2014; Ahmed et al, 2014; Udoakah and Ikafia, 2017). Further study by these authors (1990b) that was based on another set of wind speed data (1968-1983) classified wind speeds across Nigeria into four different regimes: 1.0-2.0 m/s (e.g. Oshogbo, Minna and Yola), 2.1- 3.0 m/s (e.g. Lagos, Makurdi and Port Harcourt), 3.1-4.0 m/s (e.g. Enugu, Kano, Maiduguri) and > 4.1 m/s (e.g. Jos, Nguru, Sokoto) regimes
The probability density function is used to illustrate the fraction of time for which given wind speed possibly prevails at a location

Summary

Introduction

Nigeria is a country whose energy demand exceeds supply from the national utility. considering the fact that some of the rural areas are not connected to the national grid, suggests a need to develop adequate and sustainable energy system which will be suitable, sustainable, and able to be deployed as stand-alone power source (Ajayi,2009;Ajayi et al,2009). Further study by these authors (1990b) that was based on another set of wind speed data (1968-1983) classified wind speeds across Nigeria into four different regimes: 1.0-2.0 m/s (e.g. Oshogbo, Minna and Yola), 2.1- 3.0 m/s (e.g. Lagos, Makurdi and Port Harcourt), 3.1-4.0 m/s (e.g. Enugu, Kano, Maiduguri) and > 4.1 m/s (e.g. Jos, Nguru, Sokoto) regimes. Fagbenle and Karayiannis (1994) mentioned that average wind speeds in Nigeria range from about 2 m/s to about 4 m/s with highest average speeds of about 3.5 m/s and 7.5 m/s in the south and north areas, respectively.

Results

Conclusion