John Chijioke - Academia.edu (original) (raw)
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Papers by John Chijioke
2019 15th International Conference on Electronics, Computer and Computation (ICECCO), 2019
Pipeline vandalism has been a problem to Nigeria for many decades, Nigeria suffered loss of oil r... more Pipeline vandalism has been a problem to Nigeria for many decades, Nigeria suffered loss of oil revenue as a result of lingering menace of oil pipeline and oil theft. Aside the loss of money from oil theft and leak, cost of pipeline repairs and damage to the environment and ecosystem are other devastating negative consequences posed by pipeline breaks, whether naturally occurring or caused by man. Many of the techniques proposed by researchers are infeasible and very costly. In this research, we propose a moderately cheap, environmental-friendly, and simple method of monitoring pipeline. Pipelines are independently coated using socket switching and proximity sensors. Attempts to open the enclosure or break the pipeline will first trigger the proximity sensors, which in their normal state have a HIGH signal. By triggering the alarm when there is no obstruction detected, the proximity sensors used operate in reverse. Independently, if the pipeline breaks inside an open-circuit is crea...
Energies
As the global diesel generator market grows and generators gain wider use, various methods are be... more As the global diesel generator market grows and generators gain wider use, various methods are being developed to increase their energy efficiency. One of these methods entails integrating a Li-ion battery with diesel generators (DGs). This method did not attract attention until recently because it was economically unappealing. A significant decrease in the price of Li-ion batteries in recent years has made hybrid diesel generator/Li-ion battery systems more viable. We present a model-based economic analysis of a hybrid DG/Li-ion battery system with the aim of increasing the energy efficiency of diesel power generators. Special blocks were developed for calculations and comparisons with a MATLAB Simulink model, including 457 kW DG operating modes with/without a Li-ion battery. We simulated the system in order to calculate the conditions required to achieve savings in fuel and the level of savings, in addition to the payback time of the Li-ion battery. Furthermore, we present the add...
Journal of Scientific Research and Reports
Wind energy conversion systems continue to show promises as energy source of the future. To champ... more Wind energy conversion systems continue to show promises as energy source of the future. To champion the supply for future industrial and domestic energy demand, it is imperative to improve on their reliability, energy extraction efficiency and security as these factors would enormously affect their viability and deployment. This paper presents an overview of the applications of power electronics to speed control of generators in wind energy conversion systems. Wind energy conversion system, the basis on which they are classified and their various components are concisely reviewed. Further, an up-to-date highlight of wind turbines speed control schemes is presented with focus on the roles of power electronics in these schemes. Concluding, necessary technological and economic development to aid applications of power electronics devices in emerging wind energy systems and their significance to the microgrid is understudied.
2019 15th International Conference on Electronics, Computer and Computation (ICECCO), 2019
Pipeline vandalism has been a problem to Nigeria for many decades, Nigeria suffered loss of oil r... more Pipeline vandalism has been a problem to Nigeria for many decades, Nigeria suffered loss of oil revenue as a result of lingering menace of oil pipeline and oil theft. Aside the loss of money from oil theft and leak, cost of pipeline repairs and damage to the environment and ecosystem are other devastating negative consequences posed by pipeline breaks, whether naturally occurring or caused by man. Many of the techniques proposed by researchers are infeasible and very costly. In this research, we propose a moderately cheap, environmental-friendly, and simple method of monitoring pipeline. Pipelines are independently coated using socket switching and proximity sensors. Attempts to open the enclosure or break the pipeline will first trigger the proximity sensors, which in their normal state have a HIGH signal. By triggering the alarm when there is no obstruction detected, the proximity sensors used operate in reverse. Independently, if the pipeline breaks inside an open-circuit is crea...
Energies
As the global diesel generator market grows and generators gain wider use, various methods are be... more As the global diesel generator market grows and generators gain wider use, various methods are being developed to increase their energy efficiency. One of these methods entails integrating a Li-ion battery with diesel generators (DGs). This method did not attract attention until recently because it was economically unappealing. A significant decrease in the price of Li-ion batteries in recent years has made hybrid diesel generator/Li-ion battery systems more viable. We present a model-based economic analysis of a hybrid DG/Li-ion battery system with the aim of increasing the energy efficiency of diesel power generators. Special blocks were developed for calculations and comparisons with a MATLAB Simulink model, including 457 kW DG operating modes with/without a Li-ion battery. We simulated the system in order to calculate the conditions required to achieve savings in fuel and the level of savings, in addition to the payback time of the Li-ion battery. Furthermore, we present the add...
Journal of Scientific Research and Reports
Wind energy conversion systems continue to show promises as energy source of the future. To champ... more Wind energy conversion systems continue to show promises as energy source of the future. To champion the supply for future industrial and domestic energy demand, it is imperative to improve on their reliability, energy extraction efficiency and security as these factors would enormously affect their viability and deployment. This paper presents an overview of the applications of power electronics to speed control of generators in wind energy conversion systems. Wind energy conversion system, the basis on which they are classified and their various components are concisely reviewed. Further, an up-to-date highlight of wind turbines speed control schemes is presented with focus on the roles of power electronics in these schemes. Concluding, necessary technological and economic development to aid applications of power electronics devices in emerging wind energy systems and their significance to the microgrid is understudied.