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 The presence of impurities in cowpea affects its economic value as well as industrial and domestic utilisation. This problem has persisted despite the use of various manual and mechanical cleaning methods. There exists a need to improve the efficiencies of existing cowpea cleaning devices. Literature is sparse on modelling of pneumatic separation of cowpea. This study was therefore designed to develop and validate a mathematical model for the efficient separation of impurities from...
Air-conditioning system design and ducting analysis has over the years been an aspect of Engineering, which even though has developed greatly, yet it brings about very tedious tasks of analysis, low level of accuracy, and a lot of time input in carrying out its analysis manually. This work makes provision for the use of a software package, designed for ducting analysis. It has tile capability of handling analysis for buildings having as much as nine (9) floors, with each floor having up to tw...
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 Horizontal well application has sometimes been employed as a way of minimizing excessive water production arising from coning commonly encountered during oil production in vertical wells. Lots of efforts on water coning in vertical wells have been published. Available predictive models in horizontal wells vary from rather simplistic to complex models. This study investigated the development of practical models that combine ease of use with accuracy. Conformal mapping was used to comb...
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 The objective of this project is to design and fabricate a low cost water distiller capable of producing water that is pure in all ramifications for domestic and commercial consumers. The critical components of the distiller are made of stainless steel. These parts include the tank, the lid/condenser and the distilled water collector. Selection of material used is based on both their physical and chemical properties. The tank has a square base and the opening end of the tank is slant...
ABSTRACT Sand production, which is predominant in the Niger Delta, is a growing concern in the petroleum industry because of the associated technical, operational and economic challenges. The development of sanding predictive tools and effective management strategies has received much attention in literature. However, most of the published theoretical models have been validated with laboratory or data obtained from petroleum provinces other than the Niger Delta. This work developed a simple ...
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 ...
Abstract This contribution reports on the investigation of correlation properties in an English scientific text (engineering write-up) by means of a random walk. Though the idea to use a random walk to characterise correlations is not new (it was used e.g. in the genome analysis and in the analysis of texts), a random walk approach to the analysis of an English scientific text is still far from being exploited in its full strength as demonstrated in this paper. A method of high-dimensional e...
ABSTRACT The current status of wooden classroom chairs and desks in use in selected Secondary Schools (SS) in Ibadan was investigated. Fifty-four SS were randomly selected; 12 each from rural and semi-urban, and, 10 from urban areas of Ibadan. Random sampling survey was conducted using structured questionnaire and oral interview and to collect data on chairs and desks types, designs, construction materials and methods, durability and cost factors. Joint features, failure pattern and causes we...
ABSTRACT Energy study was conducted in an organic fertilizer production plant in Nigeria, to determine the energy consumption patterns and the associated costs for the production of both powdered and pelletised fertilizer. Analysis was conducted for a daily production of 9000 kg of the finished products. Eight and nine defined unit operations were required for production of powder and pellets, respectively. The electrical and manual energy required for the production of powder were 94.5 and 5...
ABSTRACT Failure in pre-cast waffle slabs can be attributed to factors like analytical error, poor handling during transportation and placement which factors often lead to partial/total failure of slabs. The conventional method of analysing waffle slabs focuses on the ribs, while the slab portions at the top are avoided. This has led to under reinforcement and subsequent failure of the slab portions that are usually in direct contact with loads. In this study, a method that incorporates bot...