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Vol. 5, Issue 12, PP. 252-259, December 2018
Recent trends towards bulk renewable energy penetration in the power grid have made it essential to have reserve power in the system to overcome variability and intermittent nature of renewable energy sources. Battery energy storage systems (BESS) are vastly utilized for this purpose but the cost and limited life of batteries limits its use. In this paper a control strategy for battery energy storage systems is proposed in which batteries are discharged based on state of charge and state of health. Simulations are performed in MATLAB. By implementing this algorithm load can be shifted small batteries to batteries with better health and capacity. The results show the working of algorithm and the selection of batteries based on set input variable. In this way battery energy storage systems will have longer lifetime, better efficiency and economical operation.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 12, PP. 248-251, December 2018
This paper present reducing the energy consumption of light rail train by using co2-operated ventilation for air-conditioning. To achieve this precious goal, this paper proposes the use of co2-operated ventilation in order to reduce the energy used for air-conditioning purpose. The energy of co2-operated air-conditions and CAV (convention system) was simulated and analyzed by HAP software. The result of train simulation report has shown clearly that co2-operated air condition consume less energy and is cost energy effective as compared to CAV( conventional system).
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 11, PP. 240-247, November 2018
The world is currently in the process of the fourth industrial revolution due to the development of digital technologies. Developed countries in the world, such as Germany, USA, Japan and those that want to reach developed countries like China, are rapidly developing and implementing innovative technologies with the goal of achieving "intelligent manufacturing processes" or "intelligent factories". Germany is developing and implementing digital technologies through strategy called "Industry 4.0". With their policy named ‘’Advanced Manufacturing Partnership 2.0’’, the United States want to create high-quality manufacturing jobs, initiate renaissance of the production processes and connect industry with the internet. In May 2015, the Government of China, inspired by the German "Industry 4.0", has announced a ten-year development strategy or a reform called "Made in China 2025", which aims to promote China into a leading technological force by 2025, improve global competitiveness through innovations, explore and apply new jobs through adapting production, or in other words to progressively restructure and innovate the production sector like other industrial countries in the world. The best example of innovation is the automotive industry, for two reasons. The paper presents the representation of industrial robots in production processes, with particular reference to the application of industrial robots in the automotive industry, as well as innovative solutions for the future in relation to industrial robots. The paper also provides a review of innovative solutions in regard to the automotive industry.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 11, PP. 232-239, November 2018
Achieving elevated efficiency for the classification of the ECG signal is a noteworthy issue in the present world. Electrocardiogram (ECG) is a technique to identify heart diseases. However, the detection of the actual type of heart diseases is indispensable for further treatment. Various techniques have been invented and explored to categorize the heart diseases which are recognized as arrhythmias. This paper aims to investigate the development of various techniques of arrhythmia classification on the basis of fuzzy logic along with an elaborative discussion on accepted techniques. Moreover, a comparative study on their efficiency has been analyzed to emphasize the scope of novel research areas.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 11, PP. 224-231, November 2018
Fossil fuels is the main energy resource now a day with the advantage of generating gigantic electricity at a given location. Fossil resources, however, are subject to exhaustion rendering energy resources risks. The process of electricity generation from fossils fuels may be less costly compared to other schemes however this advantage comes at the expense of increased pollution, greenhouse gases emission contributing to overall global warming. Sustainable energy production requires reusable energy resources. Each renewable energy resource is characterized by a unique characteristic set and advantages, making it suitable for application of specific nature and location. In a hybrid system, the cummulative sum of the powers generated by the constituent systems should match the load demand rendering its implementation complex mainly due to the non linear behavior of the renewable energy resources and the non linearity of the fuel consumption curve. The dissimilar load demand pattern and the limit on the operation of the battery also poses a constraint. Controlling the process of any compound power source system in an optimal manner is essential and challenging to achieve low overall system cost.
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Bashir, Mohsen, and Javad Sadeh. ”Size optimization of new hybrid stand-alone renewable energy system considering a reliability index.” Environment and Electrical Engineering (EEEIC), 2012 11th International Conference on. IEEE, 2012.
Bernal-Agustłn, Jos L., and Rodolfo Dufo-Lopez. ”Simulation and optimization of stand-alone hybrid renewable energy systems.” Renewable and Sustainable Energy Reviews 13.8 (2009): 2111-2118.
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Connolly, David, et al. ”A review of computer tools for analysing the integration of renewable energy into various energy systems.” Applied energy 87.4 (2010): 1059-1082.
Dagdougui, Hanane, et al. ”A dynamic decision model for the real-time control of hybrid renewable energy production systems.” IEEE Systems Journal 4.3 (2010): 323-333.
Maniaci, David C., and Ye Li. Investigating the influence of the added mass effect to marine hydrokinetic horizontal-axis turbines using a General Dynamic Wake wind turbine code. IEEE, 2011.
Dagdougui, Hanane, et al. ”Modelling and control of a hybrid renewable energy system to supply demand of a green-building.” 5th Biennial Conference of the International Environmental Modelling and Software Society: Modelling for Environment’s Sake, iEMSs 2010. Vol. 2. iEMSs Secretariat c/-IDSIA, Galleria 2, Manno, 6928, Switzerland, 2010.
Dehghan, S., et al. ”Optimal sizing of a hybrid wind/PV plant consid-ering reliability indices.” World Academy of Science, Engineering and Technology 56.32 (2009): 527-535.
Afzal, Anis, Mohibullah Mohibullah, and Virendra Kumar Sharma. ”Op-timal hybrid renewable energy systems for energy security: a comparative study.” International Journal of Sustainable Energy 29.1 (2010): 48-58.
Diaf, Said, et al. ”A methodology for optimal sizing of autonomous hybrid PV/wind system.” Energy Policy 35.11 (2007): 5708-5718.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 216-223, October 2018
The aircraft complex systems (ACS) contains the auxiliary power unit (APU) based gas turbine, the performance assessment is totally cramped to inspection of different kind of parameters. So many other parameters can be observed in Quick Access Recorder (QAR) returns the APU condition from different aspects not having enough attention. The investigation intends to propose incorporated performance indicators by feature extraction many observing parameters. To approve the effectiveness of the strategy by anomaly identification, the clustering analysis is conducted. This technique can possibly effectively evaluate performance of some complex aircraft systems for early cautioning and prevent degradation at early stage. The parameters of Rowens model for APU based gas turbines in unique studies are assessed by utilization of accessible operational and performance data. Here, the work is planned to make understanding into different parts of the APU model and to present simple and comprehensive strategy to extract the parameters out of basic physical laws, focusing especially on researchers to let their interest in dynamic models and simulations. Gas turbine parameters are approximated by using straightforward thermodynamic assumptions, resulting great performance. In this paper, the step response of the simulation model is also simulated for number of scenarios and is presented here.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 211-215, October 2018
This paper has considered the problem of formation control of multiple quadrotor using a diversified feedback linearization technique. Taking the advantage of double integrator which normally can achieve any unrestrained shape, we have devised a linearization technique that is made possible using extended feedback. The technique has the ability of transmuting the dynamics of a quadrotor’s reference point to four double integrators in accordance with yaw angle and position of quadrotor in the space. The traditional exact feedback technique require a jerk (which is the derivative of acceleration) but it is not an issue for the extended feedback method. Ending by the conclusion the section numerical example elucidate formation control of quadrotor by using reference point and center of masses of the quadrotors.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 203-210, October 2018
Almost all developing countries are facing severe energy crisis, which is affecting their economy from several years. Most of remote areas have no access or limited access to grid, while grid extension is expensive and time consuming option. Generation from renewable sources at load center is a viable option, but huge investment and intermittency are the main constraints in implementing renewable base projects. By integrating different renewables can minimize cost and enhance reliability of distributed renewable systems. This paper mainly emphasizes on the optimization of hybrid renewable power systems having solar PV, biomass and micro-hydro with and without energy storage for a village in district Mardan, KP, Pakistan using Homer. Solar irradiance data is taken from National Aeronautics and Space Administration (NASA), hydro resource data from local irrigation department and biomass resource data from world bank biomass atlas. We have performed the techno-economic analysis of two different hybrid renewable power systems with unidirectional and bidirectional three phase converters. We have compared net present cost (NPC) and levelized cost of electricity (LCOE) of two models which justifies that system consist of PV, micro-hydro and biomass with battery storage is more economical and reliable.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 183-187, October 2018
In this paper a System for the automatic positioning of the heliostats of the Solar Power Tower plant is presented a clod detection system and a sun position algorithm will compute the exact position of the Sun, and the clouds will be detected next to the sun in order to preserve the integrity of the power tower’s system. The main purpose of this system is to achieve a maximum efficiency. Change the positions of the heliostat to away from the sun, when the clouds are about to cover the sun. In this way we can maintain the integrity of the system and to avoid damaging of the central receiver. The data that are used in the source code for the computation of the outputs from the given input parameters are also discussed. The system is successfully shock free and more efficient.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 198-202, October 2018
In this paper, we discussed voltage control method for buck convAbdul Basiterter operating in continuous conduction mode (CCM) using analog feedback system. The aim of this work is to control the output voltage of a buck converter during the variation in load current. It is obtained by using analog feedback made with operational amplifier (Opamp). However, the same technique can be applied to other DC-DC converters (e.g boost, buck-boost, cuk converter, etc) in CCM mode, but for the purpose of analysis buck converter is chosen as an example.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 193-197, October 2018
Terahertz Band (100GHz-10THz) offers larger bandwidth and ultra-higher data rates and is visualized as a key technology to alleviate the capacity limitation and spectrum scarcity of the currents wireless networks. There are some competent development and design challenges in the realization of wireless terahertz network. Signal high path loss is one of the major constraints for enabling wireless communication networks in the terahertz band. Thus for the consummation of wireless propagation links in the THz band an equivalent signal path loss model is designed incorporating the major peculiarities of the wireless channel that accounts for terahertz wave propagation in LoS propagation. The equivalent path loss model for terahertz LoS propagation is developed and simulated in matlabR. The simulation results are compared with the lognormal path loss model results.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 188-192, October 2018
Electrocatalytic activity at cathode in Polymer Exchange membrane fuel cell (PEMFC) is sluggish and requires a most active catalyst. Till now Platinium (Pt) is considered as the most feasible and active catalyst for Oxygen reduction reaction at cathode. It is most expensive and also faces the problem of poisioning due to carbon monoxide, hence a more reactive, durable catalyst is required to meet the demand for commercialization. In this study a novel non platinum group metal (N-PGM) Ni nanotubes were prepared by using hydrothermal technique using transition metal precursor with profound insight.Ni nano tubes were obtained after pyrolyzing Ni Zeolitic Imidazolate Framework (Ni/ZIF) at 800 0C under inert nitrogen atmosphere.It’s electro catalytic performance was examined by Linear Sweep Voltammetry (LSV) done with Rotating Disk Electrode (RDE) evaluation shows that, Ni nanotubes owns splendid electro catalytic behavior for Oxygen Reduction Reaction (ORR) in basic environment. It depicts a current density of -2.6mA/cm2 and an over potential of -0.28V Vs. Saturated Calomel Electrode (SCE), and RDE Results were obtained at 400,800,1200 and 1600 rpm in 0.1M KOH solution while the Ni/ZIF shows the minimum -1.4 mA/cm2..The Pt/C catalyst was also analyzed in the same environment for comparison purpose having a current density of -4.6 mA / cm2. The results reflect that Ni nanotubes is promising catalyst for Proton exchange membrane (PEM) fuel cell.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 176-182, October 2018
Electrical energy is one of the most important component in the development of any society. Electrical energy is primarily generated from fossil fuels, nuclear power or hydro but an increasing gap between demand and generation is leading is to find an alternative energy sources that produce clean energy and meet our increasing needs while maintaining the secure and reliable operation of power system. Presently Pakistan is facing extreme energy crisis and the situation is even worse in remote areas that are deprived from basic facility of electrical energy. These areas are normally gifted from natural resources that can play a key role in overcoming this problem. Run on River hydro generating units, solar Photovoltaic cells and Biomass generating units are able to generate clean electrical energy and meet the local demands; however, it is important that the frequency and voltage of that area is maintained within in the specified for the secure operation of power system. The voltage control plays important role in stable and reliable power supply. This research project will model a standalone micro grid where electrical energy will be generated from alternative sources of energy that are renewable i.e. hydro, solar irradiations and biomass resources, and then will employ specific technique for voltage control. This study will analyze the system behavior in different seasons when the load demand varies.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 10, PP. 172-175, October 2018
These days, the world faces glitches like energy crises, global warming and ozone depletion due to the power generation from fossil fuel. Petroleum derivative assets are diminishing with time because of which costs of traditional hydrocarbon fuel ascends in the universal market, along these lines most nations of the world are putting resources into sustainable power sources. Not at all like regular petroleum product run control age framework, is a power source that vitality effective, deliver low pollutions and being provided by boundless minimal effort fuel. The innovation of the fuel cell can handle these difficulties that are the reason as fuel cell is considered as ecological agreeable and effective innovation of future. Among different sorts of fuel cell, Polymer Electrolyte Membrane (PEM) fuel cell is the most diffused and well known kind of market because of its sound highlights, for example, low working temperature, brisk variety as per stack, high proficiency and better power density. In this paper PEM fuel cell stack is outlined and its model is executed in MATLAB/Simulink to dissect the examine the happening in PEM fuel cell stack and the variables that influence the efficiency of the fuel cell stacks. Besides, the properties of fuel cell stack are examined fluctuating flow rate of fuel and oxidants. The attributes curves are broken down with various working temperature, humidification temperatures, and mass (oxygen) exchange proportion.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 9, PP. 167-171, September 2018
This paper presents the effect of fly ash as reinforcement on mechanical behavior of aluminum alloy. 5% by weight of untreated fly ash was used as a reinforcement to fabricate the composite samples by sand casting technique. Tensile, Hardness and Fatigue tests were carried out for the samples. It has been observed that by the addition of fly ash to aluminum alloy improves the ultimate tensile strength(UTS) and hardness by 15.87% and 5.64% repectively as compared to sand casted simple aluminum alloy.Similarly fatigue tests reveal that fly ash reinforced aluminum composite has greater fatigue life than the unreinforced aluminum alloy.
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[2] Hartaj Singh, Sarabjit, Nrip Jit, Anand K Tyagi “An overview of metal matrix composite:processing and SiC Based Mechanical Properties” Journal of Engineering Research and Studies Vol. II, Issue IV, 72-78 Oct-Dec, 2011
[3] Pradeep, R., Praveen Kumar, B.S and Prashanth: “Evaluation of mechanical properties of aluminium alloy 7075 reinforced with silicon carbide and red mud composite” International Journal of Engineering Research and General Science, Vol. 2, Issue 6, (1081-88), 2014.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 9, PP. 163-166, September 2018
A three dimensional analysis of dynamic load - nonlinear soil - concrete blocks - pipeline have been investigated to study the major factors that influencing the response of whole system and which dominate on the interaction between different component of the problem. The present work consider the effect of pipe diameter, distance between applied force and whole system, distance between concrete blocks or span of pipe. Aspects which addressed in this study the effect of the previous factors on deformation which can be express as vertical displacement and bending moment , friction stresses between concrete blocks and soil and Also the behavior of concrete blocks with time and distance. ABAQUS software is used to reveal the effect of these factors on structural behavior of whole system.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 9, PP. 154-162, September 2018
Short term load forecasting (STLF) has gained huge interest among researchers because of its applications in economics, reliability, unit commitment (UC), economic dispatch (ED) and hydro-thermal coordination (HTC) of power systems. The aim of this study is to find an accurate algorithm as it is very important for the prediction of accurate load forecast. Support Vector Machine Regression Model (SVM-R) using different kernels i-e linear, polynomial and gaussian has been used and each kernel function effectiveness and its performance has been examined on real time series using ISO-New England utility data. LibSVM using R language is utilized in this research to employ SVM-R Model. Artificial Neural Network (ANN) is utilized to compare and check the effectiveness of proposed model and its performance by considering least Mean Absolute Percentage Error.
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This article is open access and distributed under the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 9, PP. 147-153, September 2018
Rural electrification requires to be designed in a sustainable way to improve the quality of life of rural communities. Pakistan is facing an acute energy crisis for years now. Pakistan’s energy mix mainly depends on indigenous natural gas and oil. Due to imports of oil and rapid decrease in gas reserves, there is a significant burden on the economy of Pakistan, which has forced the planners and policy makers to look for renewable energy sources. Micro Hydro Power (MHP) is an example of renewable energy which can be sustainable economically, environmentally and socially as Pakistan is rich in micro-hydro power especially the northern side. This paper analyses the outcomes from a field survey which is conducted in district Shangla, KPK Pakistan, where different agencies have implemented different MHP Projects (MHPPs). The quantitative and qualitative analyses have been used for comparing two MHPPs based on electricity tariff, community involvement, effect on the society and other factors. Quite a few issues were found due to lack of knowledge or unskilful operators in maintenance and operation in these MHPPs which are barriers to sustainable development. This research work concludes that these MHPPs requires proper management, quality work and skilful operators to have a sustainable and reliable system for the community. The MHPPs area already contributing significantly in the development of local communities.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 9, PP. 138-146, September 2018
In this investigation, the two-dimensional dynamic analyses of the wing airfoil of a swing-wing micro air vehicle (MAV) were carried under restrained pitching and flapping oscillations, which varied in the 10-degree oscillation range and the 0.1-10 reduced frequency range. The flow was in a laminar flow with a Reynolds number of 1100. The objective of this simulation was to study the flow behavior in the dynamic motions in a dynamic stall regime. Similar studies on the dynamic stall regime with low Reynolds numbers have not resulted in a particular numerical solution and have separately studied the parameters influencing the numerical solution. The most critical dynamic motions that require utmost precision in numerical analyses were reviewed and validated in this research. The results of the numerical research analyses were compared to the experimental results obtained with a water tunnel.
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Authors disclose no conflict of interest or having no competing interest.
Vol. 5, Issue 9, PP. 130-137, September 2018
There is a drastic need for the oil companies operating within the onshore(s) and offshore(s) of Nigeria to critically start looking at the various possibilities of heavy oil production from the nation’s various fields located in the Niger Delta region using already available Enhanced Oil Recovery techniques/methods such as In-situ combustion (ISC), CHOPS and SAGD. This study focused on In-situ combustion as a means of enhancing likely heavy oil production in the Niger Delta using the Nelson & McNeil 1961 ISC model. The study developed applicable screening criteria(s) for both reservoir candidacy and ISC project selection in the Niger Delta. Corresponding programs and flow-charts that would allow petroleum engineers in the Niger Delta to theoretically evaluate production performances using his/her computer(s) was also developed. It was discovered also during our course of work that all six reservoirs considered in both Case 1 (Venezuela reservoir) and Case 2 (Niger Delta reservoirs) met this study’s reservoir candidacy selection criteria(s) for possible applicability of an ISC project performance evaluation(s) with respect to enhancing oil production. These reservoirs were further graded / ranked based on their theoretical ISC project performances as calculated and evaluated using a well known ISC model as documented in the ISC handbook.
[1] Alizadeh AH et al (2014): Multi-Scale Experimental Study of Carbonated Water Injection: An effective process for mobilization and recovery of trapped oil. Fuel, 132 (2014) 219-235
[2] Al-Wadhahi, M., Boukadi, F.,Al-Bemani, A. (2005) .Nimr EOR Identification – Phase 1, Department of Petroleum and Chemical Engineering, Sultan Qaboos University
[3] Chukwudeme EA, Hamouda AA (2009): Enhanced Oil Recovery (EOR) by miscible CO2 and water flooding of asphaltenic and non-asphaltenic oil, Energy journal, 2, 714-737, DOI: 10.3390/en20300714
[4] Green, D. W., Willhite, G. P (1998) .Enhanced Oil Recovery", SPE.
[5] Hasiba, H.H, Wilson, L.A, (1975). The Potential Contribution of Enhanced Oil Recovery Technology to Domestic Crude Oil Reserves
[6] Kerunwa A, Anyadiegwu C.I.C, Ugwuanyi, A.C (2014). Enhance Recovery of Heavy Crudes in Niger Delta: CHOPS Application A key Option, The Journal of Applied Sciences Research, Vol 1, No 3 (2014).
[7] Muhammad M.R, Mahmoud M (2012): Conventional versus Enhanced Oil Recovery: A review. Journal of Petroleum Exploration and Production Technology, DOI: 10.1007/s13202-012-0034-x
[8] Nelson, T.W, McNeil, J.S (1961). How to Engineer an In-situ Combustion Project, Oil and Gas Journal, June 5, 1961, pp58-65
[9] Ossai, P.G.O, Ohia, P.N, Obah, B, Duru, U.I, Onaiwu, D.O (2017). Enhanced Recovery of Heavy Oil in the Niger Delta: Nelson and McNeil model a key option for in-situ combustion application. Advances in Petroleum Exploration and Development. (14) 2, 27-33, DOI:http://dx.doi.org/10.3968/10009
[10] Partha, S.S (1999). In-Situ Combustion Handbook — Principles and Practices, published 1999 by National Technology Information Services (403 pages)
[11] Patrick G.O. Ossai, Princewill N. Ohia, Boniface Obah & Ugochukwu I. Duru (2017) In situ combustion: Applicability to heavy oil reservoirs in the Niger Delta, Petroleum Science and Technology, 35:1, 51-58, DOI: 10.1080/10916466.2016.1247172
[12] Prats, M (1982) .Thermal Recovery, SPE, New York
[13] Sacuta, Aleksy (1980): Enhanced Oil Recovery using Electrical means. US Patent No: 4,228,854
[14] Snow, Dennis M, Tim AO (1998): Method for Enhanced Recovery of viscous oil deposits, US Patent No: 5,826,655
[15] Stevens S, Kuuskraa VA (1998): Enhanced Oil Recovery scoping study, Final Report. Palo Alto, Electric Power Research Institute.
[16] Wang Xinkui (2010): Experimental and Numerical Studies on Multiple Well Pairs SAGD Performance: A thesis submitted to the Faculty of Graduate Studies and Research, University of Alberta.
[17] Xia, T. X (2001). Down-hole Upgrading Athabasca Tar Sand, SPE69693 presented in the 2001 SPE, International Thermal Operations and Heavy Oil Symposium. Porlamar, Margarita Island, Venezuela, 12 March.
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Vol. 5, Issue 9, PP. 124-129, September 2018
This research work looked at the applicability concept of waterflooding as a key option for enhanced recovery of oil from stratified reservoirs in the Niger Delta, South of Nigeria. Waterflooding is a secondary recovery technique that commences after a homogeneous or multi-layered (stratified) reservoir has reached its economic limit by every possible primary recovery drives (i.e. natural drive mechanisms). The research also covered for Niger Delta the sweep/displacement efficiency deliverability of multi-layered (stratified) reservoirs, reservoir permeability ordering, the effect of waterflooding rates, and effectiveness of waterflooding schemes for multi-layered oil reservoirs, fractional flow of water during waterflooding processes, and the frontal advancement of the water front along the reservoir bed at a given time (t) in days.
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Vol. 5, Issue 6, PP. 120-123, June 2018
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Vol. 5, Issue 5, PP. 116-119, May 2018
The present research was undertaken to demonstrate the effects of heat treatment on the welded joints. The material used was mild steel and aluminum. Ten flat tensile specimens, ten mounted specimens for micro structure test were prepared for steel and four flat tensile specimens, four mounted specimens for micro structure. This project is an effort to establish better understanding about the heat treatment of the welded joints. The scope of work includes the preparation of test specimens for tensile testing and micro structure analyses.
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Vol. 5, Issue 5, PP. 111-115, May 2018
The emergence of Body Area Networks (BAN) in recent times has increased the interest of most researchers in the field of wearable antennas. Due to its widespread popularity most of the research has been done to improve the efficiency and flexibility of the wearable antennas for in-body and on-body applications. This work is the review of the recent development in the area of wearable antennas. Further the use of different textile materials has been studied and their performance has been compared with the ordinary used substrate such as FR-4 for wearable antennas. The results show that use of textile materials have not only increased the efficiency but also they are very flexible and make the antenna suitable for in-body and on- body applications such as medical and military. The properties of antennas inside human body, on human body and finally at some distance from the human body have been studied. It has been noted that as the distance between human body and antenna reduces the properties of antenna such as efficiency, directivity and gain degrade more and more. Also the resonant frequency of antenna shifts from its original position which is a very big issue and need to be rectified. For textile materials the shift in resonant frequency is not too much and also the degradation in other properties of antenna such as efficiency, directivity and gain are insignificant.
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Vol. 5, Issue 5, PP. 105-110, May 2018
Earth receives huge amount of solar energy which is thousands times more than the world�s yearly demand. Solar energy is very cheap reliable and pollution free source of energy. Solar energy is converted into electrical energy with the help of solar panels made of solar cells. Various methods have been developed to extract maximum power from these solar panels. Those methods are conventional and they lose huge amount of solar energy causing failure in extracting maximum power. This paper presents very efficient method to extract maximum possible power which a solar panel may deliver. Here MPPT charge controllers are used instead of conventional charge controllers which always keep on tracking maximum possible power. This paper involves designing and implementing Maximum Power Point Tracking System for a Solar Photovoltaic Panel (150 Watt). The efficiency of solar cells is low in general. So the impact of being able to extract maximum possible power out of the PV System (hence improving efficiency) is huge. The technique used in this paper to track maximum power point is Variance Inductance Method. This technique compares the actual value of ?P/?V in the circuit with zero on regular intervals to generate a PWM Signal using a microcontroller. This PWM signal then dictates the switching frequency of a buck regulator connected to the solar panel and the load/ batteries. Through this switching the values of V and P in the circuit are maintained such that maximum power keeps on getting transferred. This technique is designed and implemented in proteus and output is observed.
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Vol. 5, Issue 5, PP. 109-104, May 2018
The enormous amount of energy from sun has led to a rapid growth of the use of Solar Photovoltaic power. The solar PV power can be used in stand-alone, grid connected, and hybrid configurations. Grid connected solar PV power plants are huge and are increasing rapidly because of the diminishing of conventional fossil fuels� resources for power generation. The solar PV power plants are connected to existing power system at transmission and distribution levels. This solar PV power integration is likely to have impacts on the power system. The steady state impacts of integrating solar PV power were studied on an IEEE 9 Bus test system. Impacts on voltage levels and profile, voltage drop, voltage stability, line losses and loading of the system were studied. A comparative analysis of system without solar PV power, with PV power and different levels of penetration of solar PV power was done with the aid of a power system software namely ETAP. The study revealed that the integration of solar PV power improves the voltage levels and drops and voltage stability. However, the increase in level of penetration beyond a certain point had negative impacts on the power system i.e. worsening of voltage profile, increase of losses which can also lead the system to become unstable. From this the hosting capacity (limit to which maximum power can be penetrated) of the system is determined.
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Vol. 5, Issue 5, PP. 103-108, May 2018
Lightning strikes pose a major challenge to the safety of high voltage transmission and distribution lines. During a lightning strike a very high voltage is produced which can destroy the insulation and damage power systems. Not only are lightning strikes bad for power systems but also pose a serious threat to human life in the vicinity of electricity tower by increasing potential of the soil. Therefore, an effective lightening protections system is needed to cater those above mentioned problems. The effectiveness of a lightening protection system can be deduced by judging the earth connection of the system. Numerous and national standards are in place to help design a protection system that satisfy conditions necessary for the safety of both system and personnel. In this paper, the performance of a full scale 220kV & 500kV transmission tower base is investigated under DC, AC variable frequency and low and high impulse voltages and some of the values of Enhanced Earthling System are simulated through a MATLAB Program.
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Vol. 5, Issue 5, PP. 96-102, May 2018
Injection of solar power to current distribution system has provide many benefits such as power quality is improved, reliability is increased and peak demand is full filled. when a solar source is injected despite of it benefits it has some negative impact on protection system that in turn effect reliability and stability of system. injecting solar PV to system cause to increase fault current and severely effect protection system. We use IEEE 13 bus system for simulation with software ETAP.we inject solar PV on different buses and apply fault on different location. we compare the result of short circuit study of normal case and when PV is added. We also increase the penetration of PV and see it impact short circuit current . This comparison enables us to investigate impact of solar PV on short circuit current level and impact of this current on protection scheme and devices in this paper we will investgate the impact of injecting solar power on fault current level of distribution system and study the consequent effect of this fault current on protection system and devices of long transmission line and line losses is also reduced so it encourages to generate electricity in local and supply the near by load rather than constructing a long transmission line.
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Vol. 5, Issue 5, PP. 87-95, May 2018
Microwave pyrolysis is a modern technology to produce a good quality biochar. Gives best products, utilization and most important, process is environment friendly. In Microwave, radiation use for pyrolysis and process is: fast, specific heat area. But in conventional pyrolysis heat cannot be controlled for specific area. Microwave pyrolysis depends on the parameters: temperature, reaction time, feedstock type and Microwave Absorbers (MWAs). Production depends on the types of pyrolysis (slow, fast and flash). In the previous work focused on bio-oil and gases. But the biochar is storing source of energy and utilization. This review paper provides information about biochar obtained from microwave-assisted pyrolysis in all aspects and its utilization. It is concluded that microwave-assisted technology is an efficient technique to decrease the reaction time and increases the quality of products. In calculation, this method can overcome the requirements of feedstock destroying and improves the quality of heating.
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Vol. 5, Issue 5, PP. 76-86, May 2018
Dealing with high order coupled systems of FDEs through nonlinear p-Laplacian operator. We analyze existence, uniqueness & Hyer-Ulam stability (HUS) of the solutions by means of topological degree method. For this purpose, we transform the supposed problem into an integral system via Green�s function(s) and assume certain operator equivalent to the integral form of the problem. Then after, the results are proved with some necessary assumptions.
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Vol. 5, Issue 5, PP. 68-75, May 2018
Unconventional gas production from shale formation is not new to oil and gas experts worldwide. But our research work was built around hydraulic fracturing technique with focus on the Perkins Kern-Nordgren (PKN) 1972 hydraulic fracturing model(s). It is a very robust and flexible model that can be used on two major shale reservoirs (with the assumption of a fixed height and fracture fluid pressure). The essence was to compare detailed geo-mechanical parameters extracted from wire-line logs with Perkin-C model to select the right well as candidate for simulation. It aided in the prediction production of shale gas from tight shale formations. These also helped in reviewing safe and economical ways of obtaining clean energy sources. Based on similarities in well and formation properties our research team subjected IDJE-2 well (located in the Agbada shale Formation of Niger Delta, Nigeria) to various conditions, equations and assumptions proposed by the study model while also validating our results with the PENOBSCOT L-30 well, located in Canada (with existing profound results from stimulations). The PENOBSCOT L-30 well (Case 1) and IDJE-2 well (Case 2) were both subjected to same conditions, equations and assumptions as applicable to the study model to enable us compare and evaluate stimulation performances. But both cases tend to react differently. However the fluid behavior at constant injection time increases at about 99.64%. Whereas, the maximum width at wellbore shows that a constant increase of fracture width will yield an increase in propant permeability, tensile strength and Poissons ratio for Case 1 & 2. Our research results show how rock properties can affect fracture geometry and expected production rates from stimulated shale reservoir formations
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Vol. 5, Issue 4, PP. 61-67, April 2018
This paper focuses on the new approach to develop an efficient Boost Converter by using coupled inductors. In order to eliminate voltage spikes, a buffer circuit is used in the converter. Coupling coils generate leakage flux, and energy in the leakage flux causes voltage spikes. With a high boost ratio, the active switches in the converter can maintain the proper duty cycle, which can significantly reduce voltage and current stress. Since the main switch and the auxiliary switch can be turned on by the zero voltage switching, the switching loss is reduced, and the conversion efficiency is significantly improved. In this paper, an experiment was conducted by building a 200W boost converter model. The results show that the conversion efficiency is greater than 90%, and the surge phenomenon can be effectively suppressed. Finally, the feasibility of low-voltage input systems was verified by photovoltaic and battery system.
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Vol. 5, Issue 4, PP. 56-60, April 2018
There are millions of texts store in both off line and online forms. To utilize these documents properly, there is need of organizing these documents systematically and lots of applications are available for this purpose. Text classification is an important area of image processing deal with how the document belongs to its suitable class or category. Like other languages, Arabic language is also very rich and complex inflectional language which makes Arabic language very complex for ordinary analysis. In this review paper, we focus on the published research, especially in the field of Arabic text classification. Regard these all, three different types of feature extraction techniques are also implemented to extract features from different images of Arabic characters and presents a performance results of these techniques. From the result, it can be concluded that the combination of Linear binary pattern descriptor and Legendre moment, based moments features outperform and increase the accuracy of the LBP classifiers from 91.99 % to 93.12%.
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Vol. 5, Issue 3, PP. 50-55, March 2018
Communicating man and machine is always beneficial when their linkage is for information exchange. Information Communication Technologies (ICT) thus seek for such technologies and communication schemes where it can eliminate the use of frequent, time to time re-programming as well as charging/ topping up the battery resource. For the same purpose, researchers are always into the development of such Wireless networking based schemes where the battery constrains are minimized. Internet of things (IoT) is one of these emerging technologies. This research focuses on the implementation of IoT based techniques to minimize the battery re-charge time by studying the behavior of motes (Nodes in IoT) with respect to its information exchange, network throughput and power management. The research uses capacitor driven motes that can accept data wirelessly and transmit it directly after its reception or can restart the mote while the data is being preserved in its Read only flash. There different scenarios have been sequentially analyzed for incremental number of nodes from 2 to 15, whereas the capacitance is calculated for nominal data transfer. The results conclude that once the deployment of the network goes from scares to densely populated network, the charge due to the modeâ™s capacitance exponentially optimizes. The research concludes that lower number of nodes must be greater in order to use higher capacitance values whereas lower network density must follow the strategy of broadcasting its data without writing it on Read only flash memory.
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Vol. 5, Issue 3, PP. 40-49, March 2018
Nowadays power demand is increasing continuously and the biggest challenge for the power system is to provide good quality of power to the consumer under changing load conditions. When real power changes, system frequency gets affected while reactive power is dependent on variation in voltage value. For satisfactory operation the frequency of power system should be kept near constant value. Many techniques have been proposed to obtain constant value of frequency and to overcome any deviations. The Load Frequency Control (LFC) is used to restore the balance between load and generation by means of speed control. The main goal of LFC is to minimize the frequency deviations to zero. LFC incorporates an appropriate control system which is having the capability to bring the frequency of the Power system back to original set point values or very near to set point values effectively after the load change. This can be achieved by using a conventional controller like PID but the conventional controller is very slow in operation. Modern and optimal controllers are much faster and they also give better output response than conventional controllers. Linear Quadratic Regulator (LQR) is an advanced control technique in feedback control systems. It’s a control strategy based on minimizing a quadratic performance index. In despite of good results obtained from this method, the control design is not a straight forward task due to the trial and error involved in the selection of weight matrices Q and R. In this case, it may be hard to tune the controller parameters to obtain the optimal behaviour of the system. The difficulty to determine the weight matrices Q and R in LQR controller is solved using Genetic Algorithm (G.A). In this research Paper, G.A based LQG controller which is the combination of LQR and Kalman Filter is feedback in LFC using MATLAB/SIMULINK software package. Reduction in frequency deviations and settling time was successfully achieved by using LQG Controller with LFC based on G.A.
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Vol. 5, Issue 2, PP. 37-39, February 2018
In this research work, the effect of sandstone (SS) on concrete produced with plastic synthetic aggregate (PSA) was investigated. A mix proportion of 1:1.6:3.6 with water cement ratio of 0.50 were used. The percentage replacement of coarse aggregate (CA) with plastic synthetic aggregate and plastic synthetic aggregate/sandstone used were 0%, 5%, 10%, 20%, 30% and 40%. Concrete cubes of 150mmxl50mmxl50mm of CA/PSA and CA/PSA/SS were cast and cured at 3.7,28,60 and 90 days respectively. At the ends of each hydration period, the concrete cubes were crushed and their .compressive strength was determined. The result of compressive strength of 5-40% replacement of coarse aggregate with plastic synthetic aggregate ranges from 8.07-36.7lN/mm2 as against 24.55- 41.21N/mm2 for the control test. The result of the compressive strength of 5-40% replacement of coarse aggregate with plastic synthetic aggregate and sandstone ranges from 5.05-31.75N/mm2 as against 24.58- 41.21N/mm2 for the control test. The workability for 5-40% replacement of coarse aggregate with plastic synthetic aggregate ranges from 15-68mm as against 8mm for the control test (0% replacement).
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Vol. 5, Issue 2, PP. 32-36, February 2018
Different equipment’s are used to test the insulation of electrical machines and measure the break down voltages of different materials, e.g. Rogowski Profile, Borda Profile and fluke insulation tester. These testing techniques works on a common principle of applying a very high voltage across the insulating material and keep increasing the voltage which increases the electric field until the breakdown voltage is reached where the insulation breaks down. Different materials are tested via insulation testers to determine their breakdown voltages so that the corresponding correct materials are used accordingly in different situations. Devices with higher impurities causes sparks and arcing, so dielectrics having higher breakdowns should be used as their insulation, otherwise, a suitable dielectric should be used. This paper offers a novel method to overcome the above-mentioned problems using an insulation testing device that should be automated, less bulky, less expensive, portable and which shall be easy to use with higher degree of safety.
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Vol. 5, Issue 2, PP. 21-31, February 2018
Model Reference Adaptive System (MRAS) represents one of the most attractive and popular solutions for sensorless control of AC drive. According to the principle of asynchronous motor vector control,taking two phase rotating coordinates current model as the adjustable model and improved voltage model as reference model,a speed sensorless vector control system is built The model reference adaptive system (MRAS) method is used to identify system speed .Model reference adaptive system method is applied to asynchronous motor speed estimation and achieves speed sensorless control of asynchronous motor. The approach is implemented on Matlab /Simulink software.The simulation results show that the system has good control performance and accuracy. It proves the feasibility and practicability of the system.
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Vol. 5, Issue 2, PP. 16-20, February 2018
This paper presents the application of Modular Multilevel Converter (MMC) for connecting multistring photovoltaic generation plant. The proposed approach makes it possible for an increased PV plant capacity to be integrated with the grid, while also improving efficiency of conversion and power quality. To increase the efficiency of individual PV module, a DC-DC boost converter is employed with maximum power point tracking (MPPT). The MPPT is implemented by employing Perturb & Observe (P&O) algorithm. The PV modules with DC-DC boost converters are connected in parallel to form a DC bus which is connected to the utility grid with MMC. The MMC inverts the DC bus voltage for interfacing to the grid while maintaining the DC bus voltage constant. The simulation of the overall system in Simulink/MATLAB verifies the validity of the proposed system.
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Vol. 5, Issue 1, PP. 10-15, January 2018
In our daily routine life majority of electric loads usedare inductive in nature. Adequate supply of active power and reactive power must be supplied to these loads to ensure proper operation. If not provided with required active power and reactive power, these inductive loads burdens the system unnecessarily. Hence resulting in low power factor.In a local electrical distribution system it in uneconomical to upgrade existing network for improvement of power factor.In weak grid system residential consumers use voltage stabilizers to cope up with poor quality of voltage, while industrial consumers use switched capacitors. But voltage stabilizers regulate the voltage on cost of drawing more current from system. On the other hand switched capacitors technology is not robust enough to handle instant variations in power demand. Low power factor on local grid systems can be addressed using static var compensators. In this paper designing of SVC for local grid system is discussed.
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Vol. 5, Issue 1, PP. 1-9, January 2018
The electrical energy one of most important basics of modern lifeand the demand on this energy increase consciously. Which make some challenges to operators to increase the generation to feed the growing demand. This growth lead to extend the centralized plant to provide distribution network by required energy also lead them to develop transmission system. This method is so costly where it is required money to extend the power system. An appearance of distributed generation DG is considered a solution for these problems and can reduce the cost where it provides the load by electricity in customer side without passing through transmission system. While the aim target from DG is supporting the grid and improve power quality, voltage profile, reduction of power losses and reliability. In this paper will discuss sizing and siting the distributed generation in the grid. In this work introduced hybrid method where it is used 2/3 rule and harmony search algorithm to find optimum location and sizing respectively. This work is done under several loading cases up to 250 % from normal load also compared with other researches in this filed used the same model (IEEE 33 bus redial distribution system ) that used in this paper. MTLAB software used to complete this research.
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