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IJERD : Volume 13 - Issue 5

Version - 1 (May 2017)


Bjørn Kvamme, Marthe Austrheim, Anette Knarvik, Mojdeh Zarifi

Hydrate Formation During Transport of Natural Gas Containing Water And Impurities
  • Abstract
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  • Full Article
The upper limit of water content permitted in a natural gas stream during its pipeline transport without a risk of hydrate formation is a complex issue. We propose a novel thermodynamic scheme for investigation of different routes to hydrate formation, with ideal gas used as reference state for all components in all phases including hydrate phase. This makes comparison between different hydrate formation routes transparent and consistent in free energy changes and associated enthalpy change. From a thermodynamic point of view natural gas hydrate can form directly from water dissolved in natural gas but quite unlikely due to limitations in mass and.............
Gas hydrates, natural gas transport, rust, alternative formation routes

[1]. B. Kvamme,H. Tanaka,."Thermodynamic Stability of Hydrates for Ethane, Ethylene, and Carbon Dioxide,".J. Phys. Chem.,Vol.99, PP.7114-71191995
[2]. B.Kvamme,;T . Kuznetsova,,;P.-H.Kivelæ,.;J. Bauman,. "Can hydrate form in carbon dioxide from dissolved water,"PCCP., Vol.15,PP.2063-2074, 2013.
[3]. T. Buanes,."Mean-field approaches applied to hydrate phase transition kinetics,"PhD thesis, University of Bergen, Norway, 2008.
[4]. B. Kvamme, T.Kuznetsova, S.Stensholt, ;S. Sjøblom," Investigating chemical potential of water and H2S in CO2streams using molecular dynamics simulations and the Gibbs-Duhemrelation,"J. Chem. Eng. DataVol. 60, PP. 2906-2914, 2015.
[5]. B. Kvamme, T. Kuznetsova,B. Jensen,S.Stensholt,J. Bauman,S.Sjøblom, K.N. Lervik," Consequences of CO2 solubility for hydrate formation from carbon dioxide containing water and other impurities,"PCCPVol.16, PP. 8623 – 8638, 2014.

Citation
Bjørn Kvamme, Marthe Austrheim, Anette Knarvik, Mojdeh Zarifi "Hydrate Formation During Transport of Natural Gas Containing Water And Impurities" published at International Journal of Engineering Research and Development, Volume 13, Issue 5 (May 2017)
MID 1305.067X.0001. Norway
Page 01-16
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Reza Moheimani, Abdolreza Pasharavesh, Preetam C. Mohapatra

On the Vibration Characteristicsof Electrostatically Actuated Micro\nanoResonatorsMade of Non-perfect Conductor Materials

  • Abstract
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  • Full Article
Electrostatic actuation is one of the most prevalent methods of excitation and measurement in micron to Nano scale resonators. Heretofore, in the dynamical behavior analyses of these systems, the resonating beam has been assumed to be perfect conductor which is obviously an approximation. In this paper, effect of electrical resistivity on the vibrational response of these systems including natural frequency and damping, is investigated. The governing coupled nonlinear partial differential equations of motion are extracted and a finite element formulationby developinga new electromechanical element is presented...............
Electrical resistivity; Electrostatic actuation; Vibration characteristics; Micro\ nano resonators
[1] R. Legtenberg, H.A. Tilmans, ''Electrostatically Driven Vacuum-Encapsulated Polysilicon Resonators Part I. Design And Fabrication,''Sensors And Actuators A: Physical, 45 (1994) 57-66.
[2] W.H. Ko, Q. Wang, ''Touch Mode Capacitive Pressure Sensors,'' Sensors And Actuators A: Physical, 75 (1999) 242-251.
[3] A.A. Seshia, M. Palaniapan, T.A. Roessig, R.T. Howe, R.W. Gooch, T.R. Schimert, S. Montague, ''A Vacuum Packaged Surface Micromachined Resonant Accelerometer,''Journal Of Microelectromechanical Systems, 11 (2002) 784-793.
[4] J.-M. Huang, K. Liew, C. Wong, S. Rajendran, M. Tan, A. Liu, ''Mechanical Design And Optimization Of Capacitive Micromachined Switch'', Sensors And Actuators A: Physical, 93 (2001) 273-285.
[5] Z. Olszewski, M. Hill, C. O'mahony, R. Duane, R. Houlihan, ''Characterization, Modelling And Performance Evaluation Of Cmos Integrated Multielectrode Tunable Capacitor (Mtc)'', Journal Of Micromechanics And Microengineering, 15 (2005) S122.
Citation
Reza Moheimani, Abdolreza Pasharavesh, Preetam C. Mohapatra "On the Vibration Characteristicsof Electrostatically Actuated Micro\nanoResonatorsMade of Non-perfect Conductor Materials" published at International Journal of Engineering Research and Development, Volume 13, Issue 5 (May 2017)
MID 1305.067X.0002. Iran
Page 17-26
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Lidinga Mobonda, Alphonse Omboua

Self-Regulation of the Project Great Inga for an Interconnected Electrical Network

  • Abstract
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  • Full Article
In this article we present a mathematical approach which deals with the stability of power plants from which the synchronism should be lost; the regime on the interconnected network such as dynamic regime of linearization, the adjustment of the frequency and the regulation of power where we will take as the digital application, the case of the project great Inga (Inga is the great hydraulic power plant located in the Democratic Republic of Congo). The study of project great Inga planned for interconnecting several African countries.
Inga, Alternator, Regulation, Automatic, Interconnected network.
[1]. https://iiteeeestudents.wordpress.com/2011/11/14/interconnected-grid-system
[2]. http://www.sciencedirect.com/science/article/pii/S037877960700017X
[3]. J.F. Canard, " Impact of the generation of energy scattered in the distribution networks ", Doctoral thesis,
National polytechnic institute of Grenoble, December 12th, 2000.
[4]. B. Gotzig, " Research for an Optimal Diagram of Exploitation of an Electric Distribution network ",
Doctoral thesis, National polytechnic institute of Grenoble, December, 1997.
[5]. P. Petitclair, " Modelling and command of facts structures : application in the statcom ", Ph. D. essay,
INP Grenoble, on 1997
Citation
Lidinga Mobonda, Alphonse Omboua "Self-Regulation of the Project Great Inga for an Interconnected Electrical Network" published at International Journal of Engineering Research and Development, Volume 13, Issue 5 (May 2017)
MID 1305.067X.0003. Congo
Page 27-33
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Habtay Ghebrewold, Goteti V. Sarma

Qualitative Analysis of Prey Predator System With Imigrant Prey

  • Abstract
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The predator prey system with immigrant prey is introduced and studied through a suitable mathematical model. Existence conditions for interior equilibrium point and their stability is studied under suitable ecological restrictions. Global stability of the system around equilibrium point is also discussed.
..................
[1]. R.Clark Robinson, An introduction to dynamical systems, 2004
[2]. Jawdat Alebraheem, Persistence of predators in a two predators one prey model with non periodic solution, Applied mathematical sciences, Vol 6, 2012 N0:19, 943-956
[3]. S. Gakkhar, B. Sing, R.K.Naji Dynamical behavior of two predators competing over a single prey, Biosystems, 90 , 2007, 808-817
[4]. B.Dubey, R.K.Upadhyay. Persistence and extinction of one prey two predators system, Non linear analysis: Modeling and control, 9, 2004, 307-329
[5]. H.I.Freedman, Deterministic mathematical models in population ecology, Newyork 1980
Citation
Habtay Ghebrewold, Goteti V. Sarma "Qualitative Analysis of Prey Predator System With Imigrant Prey" published at International Journal of Engineering Research and Development, Volume 13, Issue 5 (May 2017)
MID 1305.067X.0004. India
Page 34-36
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A.Sugunakar, A.Kumar, R.Markandeya

Effect of Powder Mixed Dielectric Fluid on MRR And SR During Electrical Discharge Machining of RENE 80

  • Abstract
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This paper mainly focussed to investigate the machining characteristics of RENE 80 Nickel Alloy during powder mixed electrical discharge machining. The experiments were conducted considering electrical parameters (pulse on time, peak current and pulse off time) at optimal combination to get maximum material removal rate by varying powders like aluminium, graphite and combination of aluminium and graphite powders and their concentrations. The experimental results reveal that improvement in material removal rate with addition of powders into dielectric fluid. The maximum material removal rate (75.08 mm3/min) was noticed with graphite powder substances at 9 g/l. Minimum surface roughness...............
Aluminium Powder Concentration, Graphite Powder Concentration, Combination of Aluminium and Graphite Powders, Material Removal Rate and Surface Roughness.
[1]. Jeswani, M.L., Effect of the addition of graphite powder to kerosene used as the dielectric fluid in electrical discharge machining. Wear 1981; 70:2:133–139.
[2]. Yan, B.H. and Chen, S.L., Effects of dielectric with suspended aluminium powder on EDM, J Chinese Society of Mechanical Engineering 1993; 14: 3:307–312.
[3]. Kung, K.Y., Horng, J.T. and Chiang, K.T., Material removal rate and electrode wear ratio study on the powder mixed electrical discharge machining of cobalt-bonded tungsten carbide, Int J Adv Manuf Technol 2009; 40:95–104.
[4]. Anil Kumar.,Sachin Maheshwari., Chitra Sharma. and Naveen Beri., Realizing Potential of Graphite Powder in Enhancing Machining Rate in AEDM of Nickel Based Super Alloy 718,AMAE Int. J. on Production and Industrial Engineering 2010;01:01.
[5]. Kuldeep Ojha., Garg. R. K. and Singh. K. K., Experimental Investigation and Modeling of PMEDM Process with Chromium Powder Suspended Dielectric Int J Applied Science and Engineering 2011; 9:2:65-81.
Citation
A.Sugunakar, A.Kumar, R.Markandeya "Effect of Powder Mixed Dielectric Fluid on MRR And SR During Electrical Discharge Machining of RENE 80" published at International Journal of Engineering Research and Development, Volume 13, Issue 5 (May 2017)
MID 1305.067X.0005. India
Page 37-43
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