ABSTRACT Qualitative description of reservoir fluids is normally based on such parameters as saturation pressure, gas in solution, viscosity and density. Most Engineers ignore compositional data unless when phase behavior predictions or compositional simulation are to be undertaken. This work describes a simple, quick method of qualitative reservoir crude assessment, using the well known Type Curve matching techniques with fluid compositional data. The method is demonstrated for some Niger De...
ABSTRACT This paper presents the description and thermodynamic analysis of a new hybrid system of solar powered water heater and adsorption ice maker. Mathematical models were generated based on heat transfer in the collector, heat and lpuass transfer within the adsorbent-adsorbate pair and the themodynamics of the adsorption process. The numerical models developed from finite difference transformation of the resulting equations were developed into a MATLAB computer code for easy implementat...
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 Greenhouse is a feasible option for sustainable crop production in the regions of adverse climatic conditions. For a succe5sM greenhouse design, the selection of shape and orientation is of paramount importance. In this study, three most commonly used single span shapes of greenhouses namely even-spin, uneven-span and vinery type have be& selected for comparison. The length, width and height (at the center) are kept same for all the selected shapes. The relevance of this paper was t...
ABSTRACT In semiautomated orange fruits canning factories, the concept of bouncing ball seems applicable to the raw material transformation process in which fresh hits are passed through conveyors from the supply station (feed station) on factory floor to an elevated height where processed hits are translated, ready for sales to customers. The motion of these oranges is similar to a ball constrained to an accelerating lift tabletop. As the orange ball drops onto the surface of the upward carr...
ABSTRACT Engineering materials, mostly steel, are heat treated under controlled sequence of heating and cooling to alter their physical and mechanical properties to meet desired engineering applications. In this study, the effect of heat treatment (annealing, normalising, hardening, and tempering) on the microstructure and some selected mechanical properties of NST 37-2 steel were studied. Sample of steel was purchased from local market and the spectrometry analysis was carried out. The stee...
Abstract Early agricultural engineering services required on Nigerian farms were provided by civil engineers and agronomists some of who later retrained to form the first crops of Nigerian agricultural engineers. Agricultural engineering training was substantially done overseas until about the early 1960s when local opportunities started to be available. Agricultural engineering education started with training in farm mechanization laying emphasis on tractorization in the colleges of agricul...
ABSTRACT A biobjective production planning problem was modelled using the Compromise Constraint Biobjective LP (CCBLP) method, the traditional Weighted-sum Scalarization (WSS) and Non-preemptive Goal Programming (NGP) approaches. Various preference indices were used to explore the tradeoff options and the ~ distance metric was used to determine the best compromise solution and the appropriate preference indices. The solution of CCBLP was the closest to the ideal solution with L1 metric of 0.3...
ABSTRACT This paper presents a bicriteria formulation of the material allocation to production facilities problem. The system under consideration is a toothpaste factory. Two objectives of the factory were identified, namely; (i) Minimization of the total sum of processing costs (ii) Maximization of the capacity utilization of production facilities. Linear Combination of Objective Functions (LCOF) method was used to solve the problem for the situation where the objectives were of equal impor...
ABSTRACT This study assessed dry season farming profitability and examines farming practices and their influence on the environment. Dry season farming practices identified from the literature were irrigation practices, land preparation, tillage practices and use of agrochemicals. A cross sectional design was adopted as quantitative data was collected from respondents. Five (5) communities along the White Volta River in the Bawku West District were purposively selected based on their p...
ABSTRACT Two field experiments were conducted to compare the growth and yield of tomatoes using experimentation and FAO AquaCrop model at the University of Cape Coast Teaching and Research Farm in the Cape Coast Metropolitan Assembly of the Central Region of Ghana. The Randomized Complete Block Design was used with four (4) treatments and four(4) replications for the two experiments. The treatments used for both experiments were T1 – Full irrigation (100 %), T2 – 90 % irrigation, T3 – ...
ABSTRACT The aim of this research was to design a mini-grid solar photovoltaic electricity system for Mpahin village in the Central Region of Ghana. The researcher adopted the mixed method approach. The study is organized into two parts. In the first part of the study, a comprehensive interview was performed on respondents to know their economic conditions, their means of getting light and cooking, their preferred energy, their knowledge about solar energy and its impact on their lives as we...
ABSTRACT The drying kinetics and effect quality of dried moringa leaves using different drying methods. The methods were microwave (MW) alone, solar, sun, shade, hot air alone and blanch-assisted and MW-assisted hot air drying methods. The drying experiments were performed in the temperature range of 50 to 70 °C, MW-power of 270 to 720 W, blanching time of 1 to 3 min and sample thickness 3 to 20 mm. MW-pretreatment time, blanching time, sample thickness, microwave power and hot air temperatu...
ABSTRACT The paper presents a control system for grinding process using fuzzy rule-based model for estimating the grinding conditions at which wheel wears occur. The grinding parameters include circumferential speed of a grinding segment workpiece velocity and work depth of cut using silicon carbide grinding wheels. There was a wide range of applications over many types or mild steel materials and various wheel wear values were recorded for predicting the grinding conditions. Grinding wheels...
Abstract: Rattan, a non-timber resource in Nigeria’s South-South forests remains largely unexplored. To create schedule for unlocking its potentials, this study investigates its availability, distribution and current utilization pattern in Akwa-Ibom, Bayelsa, Cross-rivers and Rivers States in Nigeria. Information was collected using structured questionnaire and on-the-spot-assessment while data was analyzed using simple statistical tools. The four states has rattan in abundance but unevenl...