Asian Transactions on Engineering

Volume: 01, Issue: 05, November 2011
ISSN 2221-4267


Title: DEVELOPING A PARALLEL MODEL FOR OIL PRODUCING PROCESS
Authors: Hamdi A. Awad
Paper ID: ATE-60102057
Pages: 1-16
Abstract: This paper introduces a novel Petri net model for an important process in oil industry named oil producing process (OPP) for two reasons. First, the OPP has huge modules. Second it has continuous and discrete modules. In this parallel model, the continuous modules are modeled using intelligent systems while the discrete modules designed using Petri nets. Finally, these continuous and discrete modules are merged in a unified parallel frame work. Two main issues are discussed for developing this unified frame work: First, which graphical tool is appropriate for oil industry modeling and supervision? and second, what methodology is appropriate for modeling and analysis of such industries?. Testing, verifying, and validating the developed parallel model is performed using the Petri net tool software version 2.1 using real data that are collected from the field of the OPP and its catalogues. Simulation results show that the developed OPP Petri net model has small computational demand due to its compact structure that drastically reduces the scan time limited by the available technologies.

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Title: Denoising of EMG Signals Based on Wavelet Transform
Authors: N. M. SOBAHI
Paper ID: ATE-50104056
Pages: 17-23
Abstract: Wavelet analysis is often very effective because it provides a simple approach for dealing with local aspects of a signal. Electromyography (EMG) signals can be used for clinical/biomedical applications, Evolvable Hardware Chip (EHW) development, and modern human computer interaction. EMG signals acquired from muscles require advanced methods for detection, decomposition, processing, and classification. In this paper, Wavelet transform (WT) has been applied for removing noise from the surface EMG. To fully understand the concept of WT, Matlab Simulation was used for sEMG data was collected from a forearm muscle.

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Title: Unique Structure and Solute –Solvent Interaction in Imidazolium Based Ionic Liquids: A Review
Authors: G. Gonfa, M.A. Bustam, Z. Man, M. I. Abdul Mutalib
Paper ID: ATE-20114053
Pages: 24-34
Abstract: Ionic liquids have attracted wide attention lately and their potential applications in different areas have been explored. Most of the current researches on ionic liquids are concentrated on investigating what can be done by ionic liquids and why they work the way they do. The latter provide the insight into the molecular factors that determine their properties ranging from quantitative thermodynamic and physical data and qualitative tends that guide in searching the best ionic liquids for particular purpose. Many of the applications rely upon the interaction of ionic liquids with other components. Ionic liquids exhibit nanoscale phase segregation into polar and nonpolar- regions. The nanoscale self-organisation is the result of interplay between Coulomb and van der Waals interactions which leads to the formation of high charge density permeated non-polar regions. This characteristic determines how different molecular solutes interact with certain domain of the ionic liquids and distinct local environment. However, the complexities of the nature and size of cation-anion interactions and intermolecular forces in liquids phase give rise to controversies. This Review discusses the current development in understanding molecular structure, cation- anion interaction, intermolecular forces and their effects of solvation. This work is mainly concentrated on imidazolium based ionic liquids.

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Title: Sharing Experiences and Lessons Learned in Disaster Management System in Indonesia
Authors: Mochamad Teguh
Paper ID: ATE-30101054
Pages: 35-44
Abstract: Indonesia has unique geography and geol-ogy affecting its prone to natural disasters such as earth-quakes, tsunamis, floods, landslides, cyclones and volcan-ic eruptions. With a large and dense population, human-induced disasters such as fires, forest fires, pollution and environmental degradation also pose large threats. Con-sequently, most part of the country is seismically active and the geomorphology is very fragile. Urban areas are highly vulnerable to earthquake disaster and it is one of the biggest obstacles for sustainable development. This paper reviews the disaster management system in Indo-nesia to share experiences and lessons learned from natu-ral disasters. Hence, Indonesian government has pro-vided a systematic guidance of disaster management system in order to minimize huge losses of lives and properties due to major disasters. Pre- and post-disaster assessments require effective recovery processes and suc-cessful assessments which are simple, flexible, adoptable, and adjustable for further recovery process. National ac-tion plans for the post-disaster recovery process towards a better and effective execution of rehabilitation and re-construction, and an efficient funding disbursement for the activities should be well managed. The outcome of disaster risk reduction activities should be the substantial reduction of disaster losses, in lives and social, economic and environmental assets of communities and countries.

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Title: SVC Additional Damping Controller Design Using Prony Identification
Authors: Yong Lin, MingChao Xia, Edward W.C. Lo
Paper ID: ATE-60113057
Pages: 45-48
Abstract: The paper presents an identification method based SVC damping controller parameters tuning method. The most detailed SVC structure is modeled, the Prony identification method is introduced to get the controlled system, the SVC damping controller is tuned in the optimal programming and the control design result is validated in IEEE 14- bus system. Due to the research work is established on the most detailed SVC structure module and system identification idea proposed method can be practical to use.

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Title: Removal of Cu(II) from Water by Adsorption on Papaya Seed
Authors: Norhafizah binti Abd. Hadi, Nurul Aimi binti Rohaizar, and Wong Chee Sien
Paper ID: ATE-40117055
Pages: 49-55
Abstract: The use of papaya seeds as the low-cost adsorbents was investigated as a replacement for current costly methods of removing copper ions from aqueous solutions. Batch adsorption studies were conducted to examine the effects of pH, stirring rate, Cu(II) concentration and contact time on the adsorption of Cu(II) by papaya seed. Equilibrium data were analyzed using the Langmuir and Freundlich isotherms whereas the adsorption kinetics data were evaluated by the pseudo-first-order and second-order kinetic models. The optimum pH and stirring rate were found to be at pH 6 and 350 rpm, respectively. Adsorption isotherm analysis data fitted well to the Langmuir model with a maximum adsorption capacity of 212 mg/g. The kinetic experimental data correlated well with the pseudo-second-order kinetic model, which indicated that chemisorption processes could be the rate-limiting step in the adsorption process. The results demonstrated that papaya seed has potential to be employed as the adsorbent for the removal of Cu(II) from aqueous solutions.

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Title: Seismic Hazard Assessment of Padang City Using Probabilistic Method
Authors: Delfebriyadi
Paper ID: ATE-60125057
Pages: 56-62
Abstract: This paper presents the seismic hazard assessment which involved spectral hazard for 10% probability of exceedance in 50 years or correspond to return period of approximately 475 years for bedrock of Padang city. The analysis was performed using the total probability theorm with 2D seismic source model. Time history data for this site was generated synthetically by modifying the existing time history data using spectral matching analysis. In this study, design response spectra were developed by applying the methods proposed by 1997 NEHRP. The final result are the spectral accelaration and the synthetic time histories on the bedrock, and the design response spectra on Padang ground surface for 475 years return periods.

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Title: CFD Prediction of Oil-Water Phase Separation in 180o Bend
Authors: Mohammed A. Al-Yaari, Basel F. Abu-Sharkh
Paper ID: ATE-40111055
Pages: 63-67
Abstract: Oil–water two-phase flow in 180° bend is numerically simulated using FLUENT 6.2. A flow in 150, 300, 600 mm radius bends with a circular cross-sectional area (100 mm ID) are simulated using Eulerian–Eulerian approach. Standard k–e turbulence model is adopted. Three different inlet velocities (0.3, 1 and 3 m/s) are studied for all the three bends. The phase separation and turbulent flow structure are investigated for the nine test matrix. The results show negative effect, on oil-water phase separation and turbulent mixing inside the studied 180o bends, as inlet velocity and/or bend to pipe radius (R/r) ratio increases.

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Title: CFD Prediction of Stratified Oil-Water Flow in a Horizontal Pipe
Authors: Mohammed A. Al-Yaari and Basel F. Abu-Sharkh
Paper ID: ATE-80112059
Pages: 68-75
Abstract: Oil–water two-phase flow in 0.0254 m horizontal pipe is numerically simulated using FLUENT 6.2. Oil-water stratified flow regime is simulated using Volume of Fluid (VOF) multiphase flow approach. RNG k–e turbulence model is adopted. Mesh independent study has been achieved to decide on the mesh size. The phase separation is investigated for the tested stratified flow points. The stratified flow pattern results were compared with published experimental results. CFD Numerical simulation predicted the stratified flow pattern and smoothness and the type of the interface. On the other hand, while the oil layer was clearly predicated by the CFD model, water layer was not clearly predicted as a clear segregated layer.

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Title: Study of residual stress mechanism using three elasto-platic bars model
Authors: Djarot B. Darmadi
Paper ID: ATE-20134053
Pages: 76-80
Abstract: Oil–water two-phase flow in 0.0254 m horizontal pipe is numerically simulated using FLUENT 6.2. Oil-water stratified flow regime is simulated using Volume of Fluid (VOF) multiphase flow approach. RNG k–e turbulence model is adopted. Mesh independent study has been achieved to decide on the mesh size. The phase separation is investigated for the tested stratified flow points. The stratified flow pattern results were compared with published experimental results. CFD Numerical simulation predicted the stratified flow pattern and smoothness and the type of the interface. On the other hand, while the oil layer was clearly predicated by the CFD model, water layer was not clearly predicted as a clear segregated layer.

Full Text: PDF (586 KB)