ABSTRACT This paper presents the application of Artificial Neural Network (ANN) in modeling the heat transfer coefficient of a staggered multi-row, multi-column, cross-flow, tube-type heat exchanger. Heat transfer data were obtained experimentally for air flowing over a bank of copper tubes arranged in staggered configuration with 5 rows and 4 columns at different air flow rates with throttle valve openings at 10 - 100%. The Reynolds number and the row number were used as input parameters, wh...
ABSTRACT A biofiltration wastewater treatment pond was developed and the performance evaluation undertaken at the Department of Agricultural and Bioresources Engineering, University of Nigeria, Nsukka, southeast, Nigeria. The biofiltration wastewater treatment system is made of three compartments comprising a wastewater storage unit, wastewater treatment unit and treated wastewater compartment. The compartments are of the same size with the following dimensions 0.61m x0.61m x 0.5m having a ...
ABSTRACT This work focused on Evaluating the Performance of the Unified Power Flow Controller (UPFC) on Fault Current Limitation in the Nigerian 330kV Power Network. The SIMULINK model of the Nigerian 330kV system was developed. The model of the UPFC was developed and integrated into the power system model. The proportional integral (PI) control parameters of the UPFC was optimized using genetic algorithm. Results from simulation carried out showed the versatility of the UPFC in the protecti...
ABSTRACT In this research work, Bioremediation technology was used to reduce the heavy contents of the soil collected from the bank of the sewage pond of the University of Nigeria Nsukka. The heavy metals were; zinc (Zn) cadmium (Cd) and lead (Pd). In the bioremediation process, fungi, bacteria and plants were used. The bacteria used were Bacillus cereus, the fungi used was Aspergillus fumigatus and the plant used was Bryophyllum pinnatum (life plant). The combinations of these organisms wer...
ABSTRACT With the growing demand for higher bandwidth multimedia services in a network domain over the past few years, Asynchronous Transfer Mode (ATM) has emerged as a fine solution. ATM provides mobility support for mobile users as they move among base stations. One of the key issues to support user mobility is the handoff. Efficient usage of network resources is also required. Most handover scheme like Mobile Motion Prediction (MMP) Algorithm and Hierarchical Position Prediction Algorithm...
Abstract Optimization of production downtime in plastic manufacturing serves as a method to minimize machine downtime. This paper describes how to minimize machine downtime using multiple regression analysis in Statistical Package for Social Sciences (SPSS) and graphs was also used to predict the effective of downtime to cycle time, weight, production capacity, overall equipment effectiveness (OEE) and graphs were plotted accordingly. The Overall Equipment Effectiveness (OEE) of the company w...
ABSTRACT Artificial Neural Networks (ANNs) area prormsing alternative to conventional tools in modeling and prediction of complex and non-linear parameters. However, the selection of appropriate network parameters for optimum performance pose application challenges In this study, the modeling and predictive performances of six backpropagation learning algorithms: Levenberg-Marquardt (LM), BFGS Quasi-Newton (BFG), Resilient Backpropagation (RP), Fletcher-Powell Conjugate Gradient (CGF), Variab...
ABSTRACT Carbon dioxide (CO2) emissions from solid wastes is a major contributor to the acceleration of global warming. In Nigeria, CO2 capture has been limited to the energy sector only. There is need to explore the reduction of CO2 emissions from solid wastes through appropriate technologies. This study, therefore was designed to assess CO2 extraction by adsorbents in a Municipal Solid Waste (MSW) management facility in Akure, Nigeria. An exploratory study design with an intervention compon...
ABSTRACT The study addresses the stability and control of nuclear systems with emphasis on the Supercritical Water Reactor (SCWR) as proposed in the Generation IV International Forum. The literature on the stability and control of the SCWR is presented. A Computational Fluid Dynamics code, STAR-CCM+, is used to study the flow stability problems in circular channels, fuel bundle slices with and without heating structures. Some of the effects of numerical discretisation, turbulence model effect...
ABSTRACT The GHARR-1 is in the final stages of converting its HEU (90.2 %) fuel to LEU (13 %) fuel. Due to the differences if the LEU core design as compared to that of the HEU; fuel density, dummy arrnagement, number of fuel elements, this study was carried out characterize the neutron spectrum at the irradiation sites of GHARR-1 to ascertain the impact of the conversion on the neutron spectrum. This was done theoretically using the MCNP5 code. The neutron spectrum parameters (a and f ), neu...
Abstract Power plant stability at lower loads is becoming ever more important, highlighting the increasing requirement for the development of advanced models and tools to analyse and design systems. Such tools enable a better understanding of the thermo-fluid processes and their dynamics, which improves the ability to specify and design better control algorithms and systems. During low load operation and transients, such as start-up and shutdown, the required water flow rate through the evapo...
ABSTRACT The City of Cape Town is the most congested city in South Africa, with Johannesburg coming in second. Capetonians are spending 75% more time in traffic because of the congestion during peak hours, thus reducing time spent on leisure and other activities. Due to population growth, increasing car ownership and declining capacity of rail infrastructure, Cape Town’s road infrastructure will continue to be under severe pressure if the status quo is maintained. Research shows that conges...
Abstract The electric vehicle relies on electric motors for propulsion. In this report, the case was made for the induction motor as a suitable candidate for this tractive application. Being able to control the electric motor invariably implies efficient control of the vehicle. This work reports the six-step operation of the constant volts/hertz (V/f) control technique for voltage fed induction motor drives. Mathematical equations supporting the principle is discussed and the drive is modell...
Abstract This thesis aims to extract d-axis machine parameters of a 214 MVA high-speed turbogenerator using well-established offline techniques. MATLAB/SIMULINK tool has been utilized to model the generator and perform sudden short-circuit (SSC) tests. Because constant speed operation of the generator is vital consideration for the accuracy of SSC tests for parameter extraction, this thesis has employed an arrangement of 2 DC motors operating alongside a drive system, which is configured to ...
ABSTRACT The development and utilization of energy has led to environmental degradation with associated health hazard. Hence the trust of this project is to optimize energy mix in a reliable, affordable, available, safe, efficient, effective and sustainable way at control cost subject to environmental constraints. In other to achieve the desired goal, the optimization model is derived with unit cost of each of the various energy sources as the objective function and environmental impact as c...