ABSTRACT Nigeria currently imports large quantities of Activated Carbon (AC), for its domestic usage, despite abundance of agricultural wastes (coconut shells, palm kernel shells, etc), that can be used as raw materials. Short-circuiting of heating elements and absence of inert gases inlet have been identified as major challenges associated with AC production in Nigeria. This work was designed to develop a batch reactor incorporating functional materials for production of AC using locally so...
Abstract Abdominal aortic aneurysms affect 0.2% of the population and are closely associated with intraluminal thromboses (ILTs) that develop in the sac. Advanced imaging and treatment techniques are available, however there is room for improvement in the methods used to predict the outcome or necessity of surgical intervention. For a computational model to be useful in this clinical setting, it would need to incorporate relevant patient-specific data and prioritise simplicity and speed over...
Abstract This body of work entailed the broad contrasting of two hydrocarbon fuel auto-ignition models formulated for the emulation of combustion dynamics in Homogeneous Charge Compression Ignition (HCCI) engines. The first (empirical) auto-ignition model was adapted from its previously published form, for HCCI engine model implementation. This model was then combined with an explicit, single zone, thermodynamic engine model in order to investigate combustion phasing control strategies over ...
Blast loading of sandwich panels with thin-walled tube cores
Biodiesel is a clean-burning alternative fuel produced from renewable resources. However, it is susceptible to oxidative degradation due to autoxidation in the presence of oxygen, which hinders its widespread use. Antioxidant addition is a prospective solution to this problem. It is expected that antioxidants may affect the clean-burning characteristic of biodiesel. The aim of current study is to investigate the feasibility of biodiesel-diesel blended fuel of (30%, 35% and 40% biodiesel)...
Generally the anti-theft security system becomes very important these days according to the high rate recording of the theft crimes cases around the world. In this project the vehicles security system type will be the focus of the study. The main objective of this vehicle’s anti-Theft Security System project is to design a smart security system to provide the highest level of protection to the owners of the vehicles or the authorized persons for unauthorized usage objects. In the resu...
ABSTRACT Performance analysis of a model pulverized coal combustion system is undertaken. The system consists of a hopper, screw conveyor, blower, electric motor, among others. The design and construction of the system focused on the following procedures in this work: The outlet of the pulverized coal from the silo opens directly into the receiving hopper of the screw conveyor. The drive of the blower is connected to the drive of the screw conveyor via bearings, pulleys, belt and gears. This ...
Abstract Tolerancing in design stage and machining parameter optimization in manufacturing stage are related problems which have a great impact on overall production economics of a machining operation. Unfortunately, these problems have been viewed separately causing conflicts between design and manufacturing decisions. While a design decision is to attain a certain part tolerance in the manufacturing stage, the manufacturing decision may be more concerned about economical production and prod...
This research presents a building management system (BMS), which is the key module in order to perform the controlling and automation. The main area of this BMS focuses on switching and controlling of the power input/output, besidethis security. Modern building services systems are an integration of mechanical, electrical and control components. In the world of today, various subsystems in a big building have been traditionally operated separately, each with their own Information Techn...
Abstract A novel study on biomass-air gasification using a horizontal entrained-flow gasifier and catalytic processing of the product gas has been conducted. The study was designed to investigate the effect of catalyst loading on the product gas. The use of a horizontal entrained-flow gasifier reactor was used to assess the effect of the gasifier reactor orientation on the gasification process. Both experimental and computational fluid dynamics (CFD) approaches were employed. The gasificatio...
The Sudanese air force college trains its pilots using a world renowned light aircraft for basic pilot training called UTVA-75, during operation in the climate of Portsudan the exhaust tubes experienced failure in the shape of cracking and therefore become dangerous to operate. The study tackles the issue from a material point of view, as properties that eliminate or reduce cracking or any failure are essentially material properties. The research examines material selection methods to ...
ABSTRACT Although there are many computer codes available for analysis of fluid transients, only. a few are known to be applicable to linebreak situations and their scope is limited. There is, therefore, still a big potential for development work in the subject. Discrepancies between different models which have been developed have mainly centred on the assumptions used in developing the basic partial differential equations of flow, and subsequent simplifications; the thermophysical model use...
Abstract A novel study on biomass-air gasification using a horizontal entrained-flow gasifier and catalytic processing of the product gas has been conducted. The study was designed to investigate the effect of catalyst loading on the product gas. The use of a horizontal entrained-flow gasifier reactor was used to assess the effect of the gasifier reactor orientation on the gasification process. Both experimental and computational fluid dynamics (CFD) approaches were employed. The gasifica...
ABSTRACT In many types of buildings, both single and multi-storey, including schools, offices, places of worship, factories and residential buildings, the attic space is often given paramount consideration because its thermal characteristics have great influence on the conditions of the space directly below it. A significant amount of the cooling load in residential and industrial buildings is the result of heat transfer across the ceiling from the attic. Also, in some rural areas in the trop...
ABSTRACT The laminar free convective heat transfer characteristics of parabolic enclosures have been investigated using numerical computation and experimental modeling methods. The geometry is a long cavity made up of a parabolic wall bowed over a horizontal wall. Due to symmetry, the analytical model is one half of a two-dimensional cross-section consisting of a hot parabolic upper-wall, a cold horizontal base-wall of width B, and an adiabatic vertical wall of height, H. Two cases of heat-in...