Abstract In this work, three models are used to analyze the electric load capacity of a fast growing urban city and to estimate its future consumption. Ikorodu, the case-study location is a highly populated city whose energy demand is continuously increasing. The ultimate focus of this study is to establish a basis for the comparison of different electric load consumption for texisting populace and to provide estimates for the future planning of the city. In this work, three different models...
ABSTRACT Rice is the edible seed of a plant which is a member of the grass family. It is an annual plant which is grown in many countries throughout the world and is the staple diet for over half the world's population. Rice milling firm has therefore occupied a significant position in the small, medium and large scale enterprises of many nations. In application of job scheduling in rice milling activities a framework for proper scheduling of activities (jobs) in rice milling processing firm ...
ABSTRACT This paper presents the evaluation of the impact of climate change on water resources and yield capacity of Asa and Kampe reservoirs. Trend analysis of mean temperature, runoff, rainfall and evapotranspiration was carried out using Mann Kendall and Sen’s slope, while runoff was modeled as a function of temperature, rainfall and evapotranspiration using Artificial Neural Networks (ANN). Rainfall and runoff exhibited positive trends at the two dam sites and their upstream while fore...
ABSTRACT Lagos State has grown from 300,000 and 500,000 in 1950 and 1991 to an unprecedented population of 15.7 million (Mabogunje, 2002). Already, it is projected to have a population of 25 million by 2015 which will make Lagos the third largest megacity after Tokyo and Bombay and a population of 29 million by 2020, with an annual growth rate of 8 %( UNCHS, 1996; George, 2010; LWC, 2011). This scenario presents enormous emerging challenges as well as opportunities that are numerous, diverse...
ABSTRACT Energy and exergy analysis was conducted for a vegetable oil refinery in the Southwest of Nigeria. The plant, powered by two boilers and a 500 kVA generator, refines 100 tonnes of crude palm kernel oil (CPKO) into edible vegetable oil per day. The production system consists of four main group operations: neutralizer, bleacher, filter, and deodorizer. The performance of the plant was evaluated by considering energy and exergy losses of each unit operation of the production process. Th...
ABSTRACT The importance of cereal gruel as a highly nutritious food for infants in many countries in Africa cannot be overstated. Conventional methods of producing these food-slurries prior to their consumption as food cannot meet up with the high demand for these gruels. This current work is targeted at developing various archetypal machines for the improvement of the production of these food slurries. Three prototype machines have been developed and discussed in this paper, namely, the suct...
ABSTRACT Heat conduction through conventional and interlocking building bricks with cavities was studied in this work. Heat transfer analysis was carried out using MATLAB® partial differential equation toolbox. Regular and staggered hole arrangements were studied. Results showed that four staggered holed interlocking bricks were effective in thermal resistance into the bricks and increasing the holes beyond four did not give any thermal resistance advantage. For the conventional bricks stag...
ABSTRACT Experiments have been conducted to develop temper-annealing schedule for continously cast and cold-worked aluminium 1200. By using the method of graphical combination of the results of tensile and deep drawn tests, it is shown that a cost effective temper-annealing schedule that would impart improved mechanical properties.
ABSTRACT In vitro gas production of four different browse plants (Azadirachta indica, Terminalia catappa, Mangifera indica and Vernonia amygdalina) was investigated under different extractions. The relationship between the forage composition parameters (dry matter, organic matter, crude protein, acid detergent fibre, neutral detergent fibre and acid detergent lignin), process parameters (extraction mode and incubation time), and volume of gas production were modelled with artificial neural ne...
Abstract This paper examined the heat-transfer coefficients and the Nusselt number for turbulent flow for a methane-air flame occurring in cross-flow streams in an open duct. The governing equation of momentum, energy, mass fraction and radical nuclei concentration were solved in a fully coupled fashion at each control volume. The model encompasses conservation equations of gas components participating in the process and energy equation. A FORTRAN code was written with a Tridiagonal matrix s...
ABSTRACT The traditional welding flux development is by lengthy and costly trial and error experiments and the optimum welding flux formulation is not guaranteed. This paper presents discussions on promising multiobjective decision making (MODM) methods that can mitigate the limitations of the traditional approach to welding flux design. The methods are weighted-sum scalarization (WSS), desirability indices, goal programming and compromise programming. The steps a welding flux designer (WFD) ...
ABSTRACT A survey involving the use of structured questionnaires and personal communication was undertaken in South Western Nigeria to identify the livestock in the area, and their housing methods.. Chicken, pigs, rabbits, goats, sheep and cattle were the major animals found while the housing structures include baskets, battery cages, deep litter houses, cages, hutches, eggs, sheds and yards. In about half of the sites surveyed animals kept were not provided with housing, while in other pla...
The prediction of emission characteristics of sawdust particles immediately after the cutting operation from the interaction of band saw's blade and plank is a growing research area. Still, a wide gap exists with respect to understanding the behaviour of sawdust particles as they collide with one another. Previous efforts have focused on non-collision states of sawdust particles. However, in real life, collision of particles must occur, with several particles colliding after the cutting opera...
ABSTRACT This paper discusses the abundance of freshwater availability in Nigeria which is approximately 0.51 % of world freshwater resources. It further highlights the projected freshwater crises in Nigeria and Africa as a whole. Base-t on analyzed country data retrieved from International Organizations, Nigeria and in fact many developing countries in Sub Saharan Africa is presently termed water secure based on total Actual Renewable Water Resources, but projections into the nearest future ...
ABSTRACT The effects of cold water extraction, incorporation of calcium chloride (CaC1,) and aluminium sulphate (Al,(SO,),) on the setting time (LA, maximum hydration temperature (T,,), time ratio (td and surface chemistry of Eremospatha macrocarpa and Laccosperma secundiflorum particles mixed with Portland cement was investigated. The mixtures were placed in thermally sealed thermos flasks for 24 h after which L,, T,, and t, were measured. The &, T,,andt,were 12.4 and 11.9 h, 59.1 and 583"C,...