ABSTRACT This study investigated thickness requirements for field fabricated (large) spherical liquefied natural gas (LNG) pressure vessels using the finite element method. In the FEM modeling, 3-dimenisonal analysis was used to determine thickness requirements at different sections of a 5-m radius spherical vessels based on the allowable stress of the material as given in ASME Section II Part D. Shallow triangular element based on shallow shell formation was employed using area coordinate sy...
ABSTRACT The amazing development in the thermal engineering literature during the last three decades has opened up totally new and challenging research areas. One of them is the determination of surface area of .metallic bodies. Modern advancements in surface area determination (SAD) have enabled the calculation of areas of several complex shapes. More recently, problems .in ragged metallic bodies (RMB) have evolved. , Research into SAD primarily aims at calculating the cost of coating or ele...
ABSTRACT Aircraft disaster has been in existence since air was conquered by man as a means of transportation. 487.5 million and 874.4 millions of cumulative departures and flight hours respectively have been estimated since 1959. Analysis of aircraft failure based on 5,149 on-board fatalities recorded shows that 13% of total aircraft accident was caused by mechanical faiIure while loss of control was responsible for over 3 1% of onboard fatalities. Aircraft accident is known to be most fatal ...
ABSTRACT A previous paper on developing a national capability for the manufacture of activated carbon from agricultural waste by the same authors was considered. In the said paper, the process flow diagram for the manufacture of Granular Activated Carbon from three agricultural wastes namely coconut shell, oil-palm shells and sugarcane bagasse was provided and the plant’s economic analysis done. The objectives of this study were to investigate selling price reducing options and profitabilit...
Abstract The design and construction of a flat plate solar collector is presented in this paper. The solar collector was designed to power adsorption refrigerator using activated carbon/methanol pair. Design was such as to provide simplicity and yet ruggedness for harsh operating environment in the tropical climate of Nigeria. For methanol desorption, the collector must reach a maximum temperature of at least 100"C. Performance results showed that the maximum temperature of 10aoC attained in ...
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 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 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 This work investigated the distribution of Von Misses stress in LNG Spherical Carbon Steel Storage tanks. Using the Finite Element Method and equations of elasticity, constant thickness carbon steel spherical storage tanks of 40 in. dia. 70in. dia of 1 in. shell thickness were subjected to different loading conditions from 500 to 4000Psi in incrementals of 500 Psi. Spherical triangular elements based on shallow shell formulation were used for the model. The element has five degrees ...
ABSTRACT Characterisation of surface finishes of machined components and parts in machining operations is becoming more important as the world tends towards globalisation and competitiveness. Companies are choosing new technologies to improve on the surface finish of components and parts. A new method of fractal characterisation of the spectral trace of machined surfaces is investigated in this work. Fractals have been used to describe and quantify irregular fragments or complex shapes of ,ma...
Abstract The development of a possible slip line field (slf) for theoretical calculations of the deforming pressure (load) in a second pass of a lubricated cold rolling sheet mill and validation using values from an aluminium sheet rolling mill was done in this work. This will be relevant in the manufacturing industries providing an easy method for determining necessary applied rolling load. Experimental rolling was carried out to observe the shear lines in the deformation field. Constructio...
Abstract Melon shelling is an intermediate stage in melon processing and needs to be given much attention for most of the farmers still employ manual means of shelling which is time consuming, energy demanding and resulting in low income. A melon shelling machine using a rubbing action motion in peeling was designed and fabricated. The machine which is powered by 1Hp, 1400rpm electric motor consists of a hopper, the shelling chamber (rotating inner serrated drum and a fixed cylindrical ring)...
This research work investigated the corrosion resistance of zinc plated 1018 steel in tomato fluid. It simulated the effect of continuous use of the material in a tomato environment where corrosion products are left in place. 1018 steel samples were zinc elecZrop1ated at voltages between O.5V to 0.9V far 5 to 2mutm.m plated samples were then subjected to tomato fluid environment for 30 days. The electrode potentials mV (SCE) were measured every day. Weight loss was determined at intervals of ...
ABSTRACT Road tankers are the most used means of transporting petroleum product to end users due to its cost effectiveness and energy-efficiency. The cylindrical tank has been well designed for by ASME VIII divisions 1 and 2 using analytical equations. Petrol tankers are not circular but elliptical probably for stability during transportation. This paper has used the finite element method to investigate in-plane displacements and Von-Mises stresses in both circular and elliptical cylindrical ...