ABSTRACT Exergctic analysis of atmospheric distillation plant of Warri Refinery and Petrochemical Company (WRPC) was conducted to evaluate exergy efficiencies and irreversibilities in each unit of the system with aim of identifying potential areas for improvement. The process simulation was carried out using commercial simulator HYSYS® 2003. The results of the simulation compared reasonably well 'with actual plant process parameters with a relative error of 7.22%, Thchighest irreversibility ...
Abstract This paper considers the problem of scheduling in flow-shop by Johnson's Algorithm method, Branch and- Bound Algorithm method and Genetic Algorithm-seethed to find an optimal sequence for n jobs m-machine problem based on minimum elapsed time.ln scheduling the two machine flow shop problem F211 I C, one has to determine a schedule that minimizes the sum of , finishing times of an arbitrary number of jobs that need to be executed on two machines, such that each job must complete proce...
ABSTRACT In this work, modifications have been done on a prototype pneumatic separator to improve its efficiency. The effects of the modifications were studied by carrying out performance test analyses on the two blowers and reciprocating sieve mechanism which make up the critical components of the separating machine. The variations in the feed weights of the sieve were analysed to determine the best and most effective screening process. Also, the best and least tilt angles of the blowers we...
Abstract In order to monitor and control the properties of drilling fluids, measurements are routinely made at the surface. However. these surface measurements may not be representative of down-hole properties where the desired functions of hole cleaning and other related issues are critical to the success of the drilling operations. Consequently, it is important to make necessary adjustments of the fluid properties obtained at ambient conditions to give estimate of properties at high temper...
Abstract- This study utilized fractal disk dimension characterization to investigate the system response of a nonlinear, harmonically driven pendulum of mass, m (or weight. W) and length I over a well-defined parameter plane of excitation amplitude versus damping factor. The system response was simulated at three drive ffequencies (symbol,*) of 1/3, 2/3 and 313. A Runge-Kutta fourth order algorithm, coded in FORTRAN programming language was used to simulate the System response over a 101 by ...
ABSTRACT This study investigated the corrosion resistance of Nickel and Gold plated carbon steels ornamentals in 0.5rno~dd Suphuric acid (&SO4) medium. Nickel plating of carbon steel ' was done in watts solution for 25 minutes with a current density of 3 Aldrn3 at 60°C. The nickel plated carbon steel was later gold plated for 20 minutes with a current density of 0.2 A,ldm3 at 50°C . The plated and unplated carbon steels were exposed to environment for 15 days. The weight loss was taken eve...
Abstract A survey involving the use of questionnaires and personal communication during field trips was carried out in Western Nigeria with the aim of classifying and assessing the efficiency of the existing structures for the storage of crops. Barns; cribs; trenches; platforms; warehouses and silos are among the important. storage structures. The existing structures could be efficient with proper management but a major limitation of most of them is the low unit capacity which is inadequate t...
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 Low carbon steel metal is used for the manufacture of nails. Steel wire with
ABSTRACT We have been using polycrystalline thin films of anhydrous cadmium chloride (CdCI2) as an electron beam positive resist for the fabrication of features in SO2- coated silicon wafers The kinetics and mechanism of the electron-beam-induced decomposition of CdCI, which is the resist reaction, have been studied in details this work required that we know the thickness and density of the film. In the ordinary way of things, film thickness and density determination is a routine matter, but ...
ABSTRACT Moringa oleifera plant is a promising nutritional and economic resource for developing countries. Previous studies on moringa plant have focused largely on its medicinal and nutritional uses, with only a few on extraction of oil from its seeds; while solvent and aqueous enzymatic oil extraction methods have been reported for moringa seeds, literature is scarce on mechanical oil expression. This study was conducted to investigate and optimise mechanical oil expression from moringa se...
ABSTRACT This paper presents the design of a central air-conditioning/ducting system for a case study of a University Senate Chamber in Nigeria. The design aims at maintaining conditions that are conducive to human comfort within the senate chamber of the University (24OC-25.5OC, 50%-55% RH). The design month was March (6) and using the expert assistance found in the carrier system design ducting analysis manual the refrigeration tonnage obtained was 40 and the total air quantity required to ...
ABSTRACT The high cost of purchasing good quality flexible polyurethane foam called for this project work, which examines the possible reduction in the cost of production which will eventually lead to reduction in all overall market cost. Process optimization technique was adopted using gradual chemical variance method for the foam surfactant (silicone oil) to locate the optimum silicone oil quantity required as against the usual practice of ipart of silicone oil to 100 part of polyol for 20...
ABSTRACT The different options involved in cam systems design such as types of cams and followers, number of applicable standard cam functions, divisions of follower motion-segments, and possible combinations of follower displacement profiles, among others, were critically studied to determine the structure and capabilities of a software package suited for extensive design analyses. The software was applied in the design of cam profiles with selected follower and cam functions and the result...
ABSTRACT Empirical correlations for Nusselt number (Nu) in a staggered multi-row multi-column cross-flow, tube-type heat exchanger is presented in this paper. In the experiment, air at ambient banks of cylindrical rods arranged in staggered configuration of 5 rows by four columns. A test element consisting of a tube of pure copper with length internal and external diameters of 0.125, 0.0115 and 0.0125 m was heated to a maximum temperature of about 90Oc and inserted into the air stream in the ...