Abstract In the present study, a new technology controlled Ethanol/Water mix injection method is applied to a direct injection (DI) diesel engine to show effect on engine performance and emissions under steady operation. Ethanol/water mix is injected into the inlet manifold during inlet period. The experimental test matrix included six different fuels, namely Neat Diesel fuel and five secondary Ethanol/Water mix fuel with diesel fuel. The mixed fuels contain 0.55–2.79 by volume fraction of...
Abstract One motivation of grid computing is to aggregate the power of widely distributed resources and provide non trivial services to users. To achieve this goal an efficient grid scheduling system is an essential part of the grid. The scheduling of the processes can be implemented in different ways with different scheduling algorithms. In this project we use Shortest Job First [SJF] algorithm where it assigns highest priority to shortest process. If processes are long, it suffers with a l...
ABSTRACT The design of the wireless audio and video transmitter was done in stages taking into consideration a pre-selected desired frequency. These stages are the power supply stage, the carrier frequency generation stage, the carrier frequency pre-amplification stage, the voltage controlled oscillation stage and the final stage which is the modulation and amplification stage. First, carrier frequency was generated in the oscillator circuit comprising of an NPN transistor Cl 674, a vari...
Abstract Conventional methods of system load shedding are too slow and do not effectively calculate the correct amount of load to be shed. This results in either excessive or insufficient load reduction. In recent years, load shedding systems have been repackaged using conventional underfrequency relay and/or breaker interlocks schemes integrated with Programmable Logic Controllers to give a new look to an antiquated load preservation methodology. A truly modern and intelligent load shedding...
ABSTRACT This study was carried out on River Atuwara in Ota, Ogun State, Nigeria with the aim of developing a coefficient of re-aeration model applicable to River Atuwara and other rivers in the Nigerian environment. This was achieved by sourcing for data once every month from 22 sampling locations of interest within a pre-selected segment of the river over a period covering the dry and wet seasons. The data collected include hydraulic data (depth, width, velocity and time of travel) and wat...
Abstract Control system is integral part of modern society numerous applications are all around the whorled. The rockets live and the space shuttle lifts of the orbit in splashing cooling water, a malleable part is automatically machined a self guided vehicle delivering mechanical to work station in an a era space assembly planet glides along the floor speaking it’s destination. In modern industries the maintaining and handling of disturbance has a grate significance of efficiency and cost...
ABSTRACT In the last two decades, electricity generating plants in Nigeria have been operating below their capacity with available capacity barely surpassing half the installed capacity which is short of international standards of over 95% installed capacity. Due to this low availability, other key performance indicators such as capacity factor and load factor have also been relatively low. This research work therefore aims at evaluating the performance of selected gas turbine power plants i...
ABSTRACT Power quality is a global issue due to electronic equipment becoming the backbone of the modernday economy; it affects consumers, distribution, and transmission networks. This research work focuses on evaluating and proposing improvement of the measured power quality on the distribution network in Covenant University. Electrical equipment used in Covenant University can lead to power quality problems, measurements and evaluations are to be done from time to time to monitor the distr...
ABSTRACT The emission of noxious elements from building ceiling fire is increasingly becoming a source of concern globally. Hence, there is the need to develop eco-friendly flame-retardant building ceilings from composite materials to forestall the unwanted toxic emissions. This study aims at developing a bio-degradable hybrid aluminium dross ceiling utilizing varying material percentages using the moulding process. Box-Behnken factorial design from Minitab 17 was used to analyze the effect ...
ABSTRACT Power system voltage instability often results in voltage collapse and/or system blackout which is a source of concern for power network operators and consumers. This work proposes a new line stability index that is suitable for investigating the voltage stability condition of Power System Networks (PSNs). This index, which is called the New Line Stability Index-1 (NLSI_1), is derived from first principles and shown to incorporate the Line Stability Index (Lmn) and the Fast Voltage ...
Abstract This research is focus on the adjusting of a DC motor speed, predicts and expects the next values of errors that happen and appear from the difference between the actual speed and the desire speed.As known DC motor speed is hard to stabilize and adjusting in precise way, here we dealing with and use many techniques (PWM, PID controller and grey prediction) in order to reach and achieve suitable resultsfor speed and error. The main goal of this research is to introduce the grey predi...
ABSTRACT Access to groundwater, a major source of direct drinking water in many developing countries, should not be assumed as access to safe drinking water. There is a need to prevent or minimize the contamination of groundwater, especially arising from solid waste disposal. This research work investigated the suitability of using clay and bentonite modified with sawdust as landfill liner materials for minimizing the migration of Pb2+, Cd2+ and Ni2+ in order to protect the environment and p...
ABSTRACT A Printed Circuit Board (PCB) Mill is a device that etches out a pattern on a copper clad board such that it makes a PCB. PCBs are used everywhere in the field of electrical engineering to connect electrical components to one another. This research presents the design and implementation of low-cost mini PCB commuter numerical control machine based on microcontroller. A stepper motors were used to compile the movement of the three axes coordinates. Moreover, the generated Gerber file...
INTRODUCTION RADIO FUNDAMENTALS. Radio equipment are used for the transfer of information by electromagnetic means. A complete assembly of a radio circuit required to effect the desired transfer of Information is known as a telecommunication system. Common telecommunication systems include telegraphy, telephony, telemetry, television, radio etc. In general, the building block of wireless systems or otherwise include the transmitter, the channel and the receiver, The transmitter converts the...
In this thesis, assessment and upgrading of SCADA system in Petroleum pipelines is proposed, the Pipeline of Petro energy Company (Sudan branch) was considering as a case study to show the advantage of SCADA system in Petroleum pipelines and how can Achieve steady state operation. The Pipeline Control System uses SCADA to provide information to the operator in the control centre. SCADA systems displays the data transmitted from all the sensors on the pipeline and pump stations to the v...