ORIGINAL RESEARCH ARTICLE | Dec. 30, 2018
Analysis of Natural Gas Pipeline Failure (A Case Study of a Typical Marginal Oil and Gas Field in Niger Delta, Nigeria)
Ugwunna A. D, Appah D, Evbuomwan B. O
Page no 672-679 |
10.21276/sjeat.2018.3.12.1
This paper aimed at carrying out a failure analysis on a typical gas pipeline in
Niger Delta, Nigeria. The research analyzes the causes of failure of an existing pipeline
which conveys 35MSCF/D of natural gas from the processing plant of marginal oil and
gas field to a power generating station, 14km away. Non Destructive Testing (NDT)
procedure, specifically, Ultrasonic Testing method was used to carry out the failure
analysis on the pipe specimen. The pipeline thickness gauging alongside the flaw
detention procedures carried out showed that the pipeline failed integrity test, therefore
unfit for its intended purpose. The overall result shows that the major causes of the pipe
failure are metallurgical/weld defect as well as corrosion along the welded line. The
parameters obtained were used to compute the failure model for the pipeline.
ORIGINAL RESEARCH ARTICLE | Dec. 30, 2018
Palm Oil Biomass Waste a Renewable Energy Resource for Power Generation
Obuka Nnaemeka SP, Onyechi Pius C, Okoli Ndubuisi C
Page no 680-691 |
10.21276/sjeat.2018.3.12.2
This work evaluated the palm oil biomass waste as a source of renewable
energy for electric power generation. Nigeria was once the largest producer of Oil Palm
products, but since has been relegated to the back ground by Malaysia and some other
countries and needs to revitalize its palm oil industries. Electricity regeneration in
Nigeria has also been highly politicized and still at shortfall to its teeming population
demand. This situation invariably requires revamping through exploitations of
alternative energy sources. This work was carried out at Presco Nigeria Ltd which owns
palm plantations from where we obtained our oil palm empty fruit bunches for this
research. The result obtained from this work shows that 896 kg of empty fruit bunches
produced 1.7 MW of power though lower than that of the same mass of methane, it is
proving to be by far more cost effective, easier to maintain and run. The research also
reported that oil palm empty fruit bunch has more calorific value than other oil palm
biomass resources. Placing this research finding with others in literature indicates that
the quantity of the biomass is directly proportional to the amount of energy produced.
ORIGINAL RESEARCH ARTICLE | Dec. 30, 2018
Electrical Performance of Durian Skin Powder Nanoparticles with Addition of EDTA Concentration and Crystal Size Control
Khairiah, Abdul Halim Daulay, Shinta Marito Siregar, Pratiwi Putri Lestari
Page no 692-696 |
10.21276/sjeat.2018.3.12.3
One area that interests many researchers is the development of nanoparticle
synthesis methods. Nanoparticles can occur naturally or through a synthesis process
by humans. Nanoparticle synthesis means making particles less than 100 nm in size
and simultaneously changing their properties or functions. Durian skin powder
nanoparticles were synthesized using the coprecipitation method. Where the
coprecipitation method is one method of synthesis of inorganic compounds based on
the deposition of more than one substance together when it passes the saturation point.
Coprecipitation is a method that processes using low temperatures and is easy to
control particle size so that the time needed is relatively shorter. EDTA is used to
control the crystal size (diamin tetra acetate ethanol) is a titrating ligand that is widely
used in complexometric titration. EDTA added was varied by 10 drops, 15 drops, 20
drops and 25 drops to see the change in crystal size that occurred. This crystal size
control aims to obtain maximum electrical performance in durian leather powder. The
maximum electrical voltage obtained by adding EDTA little by little is 5.5 Volt with
maximum droplets as well and the crystal size is 4.9 nm. The performance of the
partners obtained is not that different from the others. So that it can be said that the
voltage will continue to increase when the size of the crystal gets smaller and the
addition of EDTA increases the droplets increasing the value of the electrical voltage
and reducing the size of the crystals of the durian leather powder.
ORIGINAL RESEARCH ARTICLE | Dec. 30, 2018
Flexural Analysis of Clamped Thin Rectangular Isotropic Plates Using Galerkin Variational Method
C. H Aginam, V. O Okonkwo, P. D Onodagu, M. O Okoye
Page no 697-704 |
10.21276/sjeat.2018.3.12.4
The flexure of a clamped uniformly-loaded thin isotropic rectangular plate is
herein analysed. The deflected surface was approximated using a grid work of beams.
Coordinate polynomial deflection function satisfying the geometric boundary conditions
was derived. Furthermore, different approximations of the derived polynomial function
were developed for the clamped rectangular plate corresponding to the first, second and
third approximations. The unknown deflection coefficients of the different deflection
functions were obtained using Galerkin method, for different aspect ratios ranging from
1.0 to 2.0 for the different approximations. The numerical values of the computed
coefficients were compared with the results from previous works and the degree and
pattern of convergence observed. The convergence to the results of the classical solution
increased as the number of approximations increased from first to third approximation
such that the average percentage difference came to 1.98 %, for maximum deflection
and 1.96 % for the maximum span moment of the principal axis in the third
approximation. This clearly shows that the present study closely compares with the
results of classical solution.