ABSTRACT Low cost and minimum emission of green house gases are two of the key advantages of using agricultural wastes as fuel in a bubbling fluidized bed combustor; however this advantage could be neutralized if significant cost and energy is spent on processing prior to usage of the waste, therefore if processing stage could be circumvented without compromising effectiveness and efficiency, a substantial operational cost saving could be achieved when using biomass as fuel in a commercial sc...
ABSTRACT The characteristics of flow over side weirs are taken into consideration to verify the discharge coefficient for subcritical flow conditions under the assumption of constant specific energy. The main channel discharge, length of weir crest and sill height of the weir are treated as controlled variables. The discharge coefficient Cd is found to depend 011 the Upstream Froude No 171 and also on the ratio of sill height to upstream flow depth S/Yl . Simple linear regression analysis was...
ABSTRACT Optimal allocation of products to downstream locations is a major requirement for minimizing the distribution costs associated with supply chain systems. Unfortunately many supply chain managers rely on, their intuition and feelings to make these allocation decisions. In this study a mathematical model was developed for minimizing the distribution cost in a multi-product 2-echleon supply chain system. The distribution system of a leading bottling plant in Nigeria was studied to under...
ABSTRACT The initial stages of the design, fabrication and performance analysis of a prototype beans particle seperating machine discussed in this work. The working principle of the machine is based on the difference in aerodynamic properties as the basis for seperation of beans and associated foreign particles, mainly chaff and stones. To achieve the pneumatic principle ,the archetype design necessitated the incorporation of two blower fans at various tilt angles to the horizontal plane. The...
ABSTRACT Secure communication systems employing chaos have recently attracted significant interest. This is partly due to their high unpredictability and simplicity of implementation over conventional secure communications systems. This study presents the implementation of four chaotic modulation techniques employing Lorenz system as chaos generator. The techniques are Chaotic Masking (CM), Chaos Shift Keying (CSK), Chaos On-Off Keying (COOK), and Differential Chaos Shift Keying (DCSK). Simul...
ABSTRACT In this study, an artificial neural network (ANN) based model for prediction of solar energy potential in Nigeria (lat. 4–14N, log. 2–15E) was developed. Standard multilayered, feed-forward, back-propagation neural networks with different architecture were designed using neural toolbox for MATLAB. Geographical and meteorological data of 195 cities in Nigeria for period of 10 years (1983–1993) from the NASA geo-satellite database were used for the training and testing the networ...
ABSTRACT The frequent occurrence of fire accidents in commercial complexes has become a serious problem in Nigeria. The development of a quantitative tool for evaluating the proneness of a commercial complex to so called 'market fires' is the focus of this study. A rigorous review of the literature was carried to identify and characterize some existing risk analysis models applicable to the problem. Some past fire disasters were analyzed. Using the insight gained from the above, a mathematica...
ABSTRACT This paper applies the concept of Hybrid Structural Interaction Matrix (IISIM) to the management of quality in a manufacturing organisation. 111e application is motivated by the need 10 evolve alternative prioritisation tools in quality management. A process, which could be used to analyse a specific situation, was presented by showing how Structural Interaction Matrix (SIM) and Hierarchical Tree Structure Diagram (lITSD) could be used 10 create a model. The result indicates the feas...
ABSTRACT Energy study was conducted in an organic fertilizer plant in Ibadan, Nigeria, to determine the energy requirement for production of both powdered and pelletised organic fertilizer. The energy consumption patterns of the unit operations were evaluated for production of 9,000 kg of the finished products. The analysis revealed that eight and nine defined unit operations were required for the production of powder and pellets, respectively. The electrical and manual energy required for t...
ABSTRACT There is much concern about the fossil fuel exhaustion and the environmental problems associated with conventional power generation. PV systems are the most direct way to convert solar radiation into electricity and are based on the PV effect, which was first observed by Henri Becquerel in 1839. It is quite generally defined as the emergence of an electric voltage between two electrodes attached to a solid or liquid system upon shining light onto this system. Practically, a...
ABSTRACT The effect of moisture content (5-24%) on some physical and compressive properties of the ‘Amelonado’ and ‘Hybrid’ varieties of cocoa beans were studied. Alongside, the effects of fermentation periods (0-8 days) on the biochemical profiles of the dried beans were studied in three morphological parts (whole bean, nib and shell). Four experiments were separately conducted as completely randomized, factorial designs. Compared to the ‘Amelonado’ variety, the axial dimension...
ABSTRACT This study assess of the potential impact of climate change on peanut yield in Senegal. Seven field experiments were conducted at three sites in the dry seasons of 2014 and 2015 and the rainy season of 2014. SIMPLACE1 crop model was calibration and validation at two sites Bambey and Nioro and for two peanut cultivars over two years. To assess the impact of climate change on peanut growth and yield in Senegal, outputs of four Regional Climate Models were used together accounting for ...
Abstract In this project the design of an automatic ground vehicle for use in warehouses is explained. Ecommerce has been growing rapidly across the globe because of the spread of the internet and due to the introduction and acceptance of secure digital payment systems. Volumes of products handled by online stores has been increasing exponentially because of increased demand. This has resulted in a need for online shops to automate some of their processes in order to make logistics more effic...
Abstract A Wind tunnel is a mechanical assembly used to analyze the behavior of air flow and the effects they have over objects. Using a wind tunnel, one can control the stream conditions which influence forces on the test object. Through the calculations of the forces on the model, one can anticipate the forces on the full-scale test object. In the beginning, wind tunnels were used to utilized to comprehend and improve the execution of airplanes. Over the years, cars, bridges, and building w...
ABSTRACT In search for an alternative source of energy and also in order to utilize the shea waste in an appropriate way and to reduce its negative impact on the environment, the waste was investigated to identify its potential in methane generation through anaerobic digestion. The basic raw materials for the study were shea waste and cow dung. Input substrates were prepared with addition of predetermined amounts of water to bring the substrates to the required organic dry matter (odm) conc...