Search result(s): 256 - 270 of 619 » Department » Engineering

modeling, analysis and simulation of a dc grid single ended primary inductance converter for dc load

This research studied a circuit topology of a solar based Single Ended Primary Inductance Converter (SEPIC) system and a battery furnishing a permanent magnet dc motor with current via a dc grid. The complete model equations of the entire system were derived. Harmonic balance technique was used to determine the converter steady state and ripple qua... Continue Reading

Engineering

design and environmental - behaviour modelling of a bluetooth controlled planter robot

This research is aimed at the design and implementation of a Bluetooth controlled planter robot. It involved a mechanical design, a Bluetooth control design, an implementation of prototype and environmental behaviour modelling as well as validation of the robot’s model. The design was optimized for planting maize as a case study in Zaria. In the ... Continue Reading

Engineering

carrier propagation on the shiroro complex 132kv transmission lines

This project aims at assessing the carrier propagation on a specified section of NEPA overhead powerlines, namely, the Shiroro Complex 132kV lines. Following an overview discussion of powerline carrier communication systems, consideration was given to the type of parameters required for assessing the communication system on the Shiroro Complex. Lin... Continue Reading

Engineering

effect of some vegetable based oil as lubricants on the extrusion of aluminium

Four vegetable based oils were used as trial lubricants in the extrusion of aluminium billet through four different die geometries. These oils were extracted from Castor seeds, Neem seeds, Jatropha seeds and Cotton seeds respectively. Results obtained from this work as compared with other works done in the area shows that these oils were found to b... Continue Reading

Engineering

application of fibre reinforced concrete in the design and construction of tension controlled structures

Linear-elastic theory of fracture mechanics was reviewed and a proposed method for designing structural elements subjected principally to tension presented, based on the strain-energy-release-rate for the fibrous concrete mixes. Eighteen experimental models were provided and of which seventeen were tested and reported including the load ranges and ... Continue Reading

Engineering

gasification of liquid fuels

Analysis of the results of the simulation for the production of gaseous fuel by gasification of kerosene was made. Also treated, were the possible methods of actualizing this principle. Simulation results showed that at ambient conditions, kerosene (DPK) can not support a flammable vapor and a liquid booster in form of petrol (PMS) was employed to ... Continue Reading

Engineering

modeling and stabilization analyses of a microunmanned aerial vehicle system using a modified radio controlled-based helicopter

This work is aimed at modeling and carrying out state space analysis of a micro-UAV (unmanned aerial vehicle) which is based on a modified radio controlled (RC) coaxial helicopter. The modification involved incorporating payload such as: GPS (global positioning system) module, Arduino microcontroller board and the Arduino Wi-Fi shield. The modeling... Continue Reading

Engineering

the functional form and energy stability of travel expenditures in nigeria

The characteristics of (ravel money expenditure in a Nigerian setting are examined, with special emphasis on the its functional form and energy stability, using the before and after the October 1994 fuel price increase situations. Preliminary analysis of travel charatcristics show general reduction in trip rates, with the least average reduction of... Continue Reading

Engineering

the structure, petrology and geochemistry of the tibchi younger granite ring-complex, nigeria

The 1 :50,000 geological map of the Tibchi Complex presented is characterised by a closed elliptical ring-dyke framework hitherto unpredicted by pioneer workers. Major rock units comprise a basalt - potassic granite suite. The structural history of the Complex involved a central shield volcano, succeeded by a caldera and fluidised intra-caldera vol... Continue Reading

Engineering

production of bioethanol from elephant grass (pennisetum purpureum) stem

The production of bio-ethanol from Elephant grass (Pennisetun purpureum) stem was carried out using elephant grass stem as a feedstock and a combination of Aspergillus niger at 0.2%(w/v) 0.4%(w/v), 0.6%(w/v), 0.8%(w/v) and 1%(w/v) concentrations and Saccharomyces cerevisiae (brewer’s yeast) at 0.5% (w/v), 1%(w/v), 1.5%(w/v), 2%(w/v) and 2.5%(w/v)... Continue Reading

Engineering

synthesis of biolubricant from vegetable oils

This thesis aimed at the production of biolubricant from vegetable oils. The first stage produced methyl ester of the oil and in the second stage; the methyl ester was transesterified with Trimethylolpropane (TMP) in a ratio of 3.5:1 at 1500C to produce the biolubricant. The pour points biolubricant and its blend were significantly improved when co... Continue Reading

Engineering

building response to dynamic loads due to quarry blasting

The Existence of quarries near residential areas is now becoming inevitable. In order to protect building Structures against quarry operations hazards, there is need to quantify response of these structures to hazards. One of such hazards is the dynonic loads emitted and transmitted through the soil and air media due to blasting of the rock for its... Continue Reading

Engineering

experimental performance evaluation of laboratory and field solar and hybrids crop dryers

Five small scale and two medium scale crop dryers with and without rockbed heat store well as a hybrid crop dryer, suitable for crop drying in different locations in savanna of Norther Nigeria were designed, constructed and lab-tested in IAR/ABU, Zaria The full capacity of the small scale dryers are 50kg of maize grain, 20kg of fresh tomatoes and 1... Continue Reading

Engineering

suitability of local vegetable oils for cold extrusion of aladja st60-2 structural stbel

The performance of some vegetable oils (palm oil groundnut oil, soya bean oil, and shea butter oil) as lubricants in the cold extrusion of Aladja ST60-2 structural steel has been investigated in the direct extrusion of 13mm diameter slugs with different initial billet lengths at various extrusion ratios and speeds. The performance criteria employed... Continue Reading

Engineering

a study of the influence of stopped delay on driver gap acceptance behaviour

The influence of stopped delay on driver gap acceptance behaviour is investigated. Gap rejection/acceptance data collected for minor road drivers executing left-turning manoeuvres at two separate priority intersections are analysed. The mean critical gapfit (C) and its variance (O2) are separately estimated from the aggregated data and from abstrac... Continue Reading

Engineering

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