A.S.O. Ogunjuyigbe

Wind‐Driven Self‐Excited Reluctance Generator for Rural Electrification

This chapter presents the dynamic performance of an isolated wind‐driven self‐excited reluctance generator (WDSERG) for rural electrification application. The performances of the machine under conditions of constant wind speed, varying wind speed, constant load, and varying loads are analysed and presented. The modelling and simulation have been carried out using MATLAB‐Simulink. A step‐wise procedure clearly set forth for the Simulink implementation of the wind‐driven machine forms the balance of this work, which can be a good teaching aid. The result shows that with the variations in the connected loads, the output frequency of SERG remains constant, which makes it a good alterna‐ tive for rural electrification.

Optimum selection of photovoltaic modules using probabilistic approach based on capacity factor estimation

ABSTRACT In this paper, the optimum selection of photovoltaic module using probabilistic techniques based on capacity factor estimation is proposed. The approach entails modelling the solar irradiance characteristics of the site by fitting probability distributions to the irradiance data for different hours of a typical day in each month of the year. The parameters of the probability distribution that best fits the solar irradiance data for a particular hour are thereafter used to estimate the capacity factor of different designs of PV modules. The module with the highest average capacity factor across all the months is identified as the best suited module for the given site. The proposed technique is investigated using 5 years data (2008–2012) of solar irradiance and temperature. The choice of the year of observation of the data was due to accuracy and completeness of the data for the period. The data sheets of 10 commercially available PV modules were also obtained from different manufacturers. The proposed method is simple, easy to use, and can be applied to any solar regimes around the world.

Evaluation of solar powered water pumping system: the case study of three selected Abattoirs in Ibadan, Nigeria

ABSTRACT In this paper, detailed and comprehensive analysis of the technical, environmental and economic benefits of providing adequate water supply using solar PV system for three selected abattoirs (Bodija, Akinyele and Iyana church abattoirs) in Ibadan are presented. First, an estimate of average daily water requirement for slaughtering and cleaning cattle is obtained for each of the abattoir. This was achieved through oral interviews conducted at the different abattoirs to arrive at a reliable estimate. Thereafter, the total water requirement, the water storage capacity and the electrical load requirement necessary for the sizing of solar PV system that will enhance the smooth operation of the abattoir are determined. Some of the key results revealed that the water requirements of the abattoirs are 208,780, 91,632 and 78,590 l/week, respectively. The most suitable submersible pump for the three abattoirs is 60GS50 (5hp, 60gallon/min Goulds series). The cost of pumping water and providing lighting for smooth operation of the abattoirs are

On the most suitable sites for wind farm development in Nigeria

0.23,

Dynamic performance of wind-driven self-excited reluctance generator under varying wind speed and load

0.21 and

User satisfaction-induced demand side load management in residential buildings with user budget constraint

0.19, respectively. The results also show that 16,300, 15,200 and 14,600 kg/yr of carbon dioxide as well as 46.37, 43.36 and 41.45 kg/yr of carbon monoxide could be avoided, respectively with the implementation of the project.

Life cycle assessment of waste-to-energy (WtE) technologies for electricity generation using municipal solid waste in Nigeria

The increasing demand for energy and the need for clean and affordable energy in Nigeria have necessitated the need for renewable energy resource assessment and subsequent determination of suitable sites within the country. One of the promising renewable energy resources with good potentials of meeting the energy requirements is wind. One of the main challenges of wind power development in Nigeria is lack of scientific data for policy formulation and decision making that will aid the development of wind power utilization. The data presented in this article were obtained with proper evaluation of the wind resource while taking into consideration environmental, social, and economic factors. The information from the data could be useful for taking optimal site selection decision by the policy makers, government, engineers etc. This will ensure optimal investment and return on investment for wind farm developers.

Recyclable resources from municipal solid waste: Assessment of its energy, economic and environmental benefits in Nigeria

This paper presents the dynamic performance of a wind-driven self-excited reluctance generator (WDSERG) to obtain a desired output voltage under a stochastic wind speed variation and changing load. The dynamic model of SERG is developed and utilised to simulate the WDSERG in the MATLAB-Simulink environment. A stochastic wind speed profile is generated using weibull distribution. The excitation capacitance required to maintain the output voltage at a desired level is computed for each wind speed and load. The obtained capacitance value is utilised to provide the required excitation for the self-excited reluctance generator (SERG). Different scenarios of load conditions are considered and an optimal capacitance value is determined and selected for each load cases. The results show that in spite of the variation in wind speed or load, a desired output voltage level within predetermined limits is obtained. This illustrates that variable excitation capacitance can be utilised to follow the wind speed in order to produce a desired output voltage level under any given operating conditions of wind speed and terminal load, within the steady state limits of the SERG. Therefore, this can offer an effective and low-cost solution for output voltage control of WDSERG, particularly in remote locations.