Volume 5, 2019 (In Progress)

About the Cover

The reliability analysis on the boiler operation was conducted in this study. The operations of a boiler in the brewery process and the reasons for failure in the boiler’s system operation was investigated; the various components of a boiler system such as vapourizer, overheater, economizer, rotary air preheater, Air fan and Flue gas fan was examined for failure that can lead to its maintenance forecast and performance and to analyze the reliability of the boiler operation with respect to its failure rate. The descriptive statistics of the reliability indices was employed in the analysis and the Mean time between failures, mean time to repair, failure rate, repair rate and availability indices were determined. Reliability analysis was conducted on the boilers operation and results obtained reveals that for C1 and C2 the Mean failure rate (λ) is 0.0004852 failure/hour. The reliability at the end of 1000 hours of operations is 0.61. For C3 and C6 boilers, the mean failure rate (λ) is 0.0005422failure/hour. The reliability at the end of 1000 hours of operations is 0.58. For C4 and C5 boilers, the mean failure rate (λ) is 0.0004709 failure/hour.

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CASE STUDY

Reliability analysis of boiler operation in a brewery: a case study

AkeNdubuisi, Ukpaka C Peter, Nkoi B

The reliability analysis on the boiler operation was conducted in this study. The operations of a boiler in the brewery process and the reasons for failure in the boiler’s system operation was investigated; the various components of a boiler system such as vapourizer, overheater, economizer, rotary air preheater, Air fan and Flue gas fan was examined

Science & Technology 2019, 5, 1-18

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Viscosity analysis of crude oil: A case study of Nigeria Crude Oil

Hassan A

Crude oil transportation is of great paramount considering the safety and economical effect associated with it. Viscosity of crude oil which is the measure of the resistance to shear or flow is an important factor in transporting crude oil.

Science & Technology 2019, 5, 19-29

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ANALYSIS

Application of Langmuir Isotherm on Adsorption to Monitor the Uptake of oil using Abura Sawdust in Seawater medium

Ikenyiri PN, Abowei FMN, Ukpaka CP, Amadi SA

This research was conducted to examine the significance of the application of Langmuir isotherm on the rate of adsorption to monitor, predict and simulate the uptake of soil using Abura wood sawdust in sea water medium.

Science & Technology 2019, 5, 30-37

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Effect of Capillarity on Diffusion of Crude Oil in Soil Environment

Bright Chinyeze Wecheonwu, Puyate YT, Ukpaka PC, Ehirim EO

The effect of capillarity on diffusion of crude oil in soil environment in some fifteen measuring cylinders of different capacities, diameters and heights ranging from 10cm3 , 100cm3 , 250cm3 , 500cm3 , and 1000cm3 volumes, 1.20cm, 2.80cm, 3.90cm, 4.80cm and 6.40cm diameters and 12.80cm, 24.10cm, 29.50cm, 34.0cm and 42.50cm respectively.

Science & Technology 2019, 5, 38-47

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Growth, yield and nutrients potentials of Vigna unguiculata (L.) Walp as influenced by water regimen

Sam SM

Effects of different concentrations of water were evaluated on growth performances and nutrient potentials of Vigna unguiculata.

Science & Technology 2019, 5, 48-57

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REPORT

Performance evaluation of a biogas stove

Muhammadu Masin Muhammadu, Bongdap Nanbol Keza

This paper dwells on the design, fabrication and testing of a biogas stove from the locally available materials and fed with easily available cow dung as a seeder and kitchen wastes as continuous feed stock which yields much gas within 24 hours of charge resulting in a burning biogas stove for household usage.

Science & Technology 2019, 5, 58-68

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RESEARCH

Effect of Fe doping on the structural and optical properties of ZnO thin films for vapour sensor application

Elavarasan T, Suhashini Ernest, Fairose S, Samson Daniel

Fe doped ZnO samples (Fe 0.001M, Fe 0.002M and Fe 0.003M) ZnO (0.1M) were deposited on the glass substrate using spray pyrolysis technique at optimized deposition conditions.

Science & Technology 2019, 5, 69-77

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ANALYSIS

Comparative assessment of GHG Emissions of Efficient and Inefficient Broiler Farms in Kaduna State of Nigeria: Environmental Sustainability

Sadiq MS, Singh IP, Lawal Muhammad

This study applied a non-parametric method in determining efficiency of farmers, discriminate efficient farmers from inefficient ones, and identify wasteful uses of energy in order to optimize the energy inputs for broiler production.

Science & Technology 2019, 5, 78-90

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PERSPECTIVE

Real physical meaning of the spin of electron

Mei ZH, Mei SY, Yu QX

Further study of quantum mechanics led us to some new comprehensions. The spin of electron is no longer spin of electron in quantum mechanics, but the effect of relativity.

Science & Technology 2019, 5, 91-96

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ANALYSIS

Distribution of number and density of electrons in quadrupole Penning trap

Dyavappa BM, Sharath Ananthamurthy

In ion traps a single charged particle to few millions are trapped and studied to characterize them. The number distribution of the trapped electrons with trap voltage is measured.

Science & Technology 2019, 5, 97-105

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Double diffusive MHD flow of a chemically reacting Alumina nano fluid past a semi-infinite flat plate: Part 2

Ngiangia AT, Nwabuzor PO

The study of Double diffusive MHD flow of a chemically reacting Nanofluid is presented in this paper. The solution to the governing equations was obtained by the collocation weighted residual method

Science & Technology 2019, 5, 106-113

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Design and development of a Marine Rudder System

Thaddeus C Nwaoha, Fabian I Idubor

This research is primarily aimed at designing a rudder stock steering gear system that is capable of moving the rudder from 35o port to 35o starboard and vice versa under deepest draft and maximum speed

Science & Technology 2019, 5, 114-125

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REPORT

Dynamic effects associated with structural in homogeneity of structures

Mustafoyev Nemat Safoyevich, Akhmedov Mumtoz Abdunabiyevich, Akhmedov Maqsud Sharipovich

Oscillations of mechanical systems consisting of absolutely rigid bodies interconnected by measles viscoelastic elements are considered. The problem is reduced to solving transcendental algebraic equations, which is solved numerically.

Science & Technology 2019, 5, 126-131

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ANALYSIS

Experimental investigation on fluid flow and heat transfer in various lengths of square twisted duct

Suvanjan Bhattacharyya, Rabi Shankar Mukherjee, Souresh Pal, Kausik Pal, Dipayan Pal

The experimental friction factor and Nusselt number data through a square twisted duct have been presented. Experiments were conducted for air as a working fluid with uniform wall flux boundary condition.

Science & Technology 2019, 5, 132-139

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REPORT

Own linear vibrations of cylindrical shells in elastic medium

Muxitdinov RT

In this paper, we consider the natural linear oscillations of cylindrical shells in an infinitely elastic medium. The frequency equation is obtained, which is solved by the methods of Muller. An analysis of the numerical results.

Science & Technology 2019, 5, 140-146

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ANALYSIS

Application of geospatial technology in assessing the impact of urbanization on vegetation degradation in Kuje area council, Abuja, Nigeria

Abakpa DI, Ejaro SP

The level of Urbanization in Kuje Area Council in the last thirty (30) years has degraded the vegetation cover. This study used geospatial technology to assess the impact of urban growth on the vegetation cover between 1985 and 2015.

Science & Technology 2019, 5, 147-158

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