iosr-JMCE   International Conference on RECENT TRENDS IN ENGINEERING AND MANAGEMENT

Abstract: The paper presents the results related to the design, the realization and the experimentation of an autonomous PV system equipped with a solar regulator, digital MPPT command and power strip. The solar regulator controls the state of charge of batteries, and at the same time the energy supplied by photovoltaic panels is optimized to the maximum using a DC/DC converter of Boost-type , a digital MPPT command and a power strip. The results obtained during days with weather perturbations, showed the robustness of the PV system (stability, optimal functioning of PV panels),and good control of charge of batteries under the maximum of energy supplied by the PV panels, The programmable power strip, DC/DC converter and digital MPPT command constructed with the relays and controlled by the microcontroller allows to control and optimize the whole system through wireless transmission and determinate the state of charge of battery and provide protection against the overcharge and the deep discharge.
Keywords- Digital MPPT (maximum power point tracking); Regulator, PV(photovoltaic) system; , Efficiency; optimization of photovoltaic energy

[1]. RAFA Souad, KHENFRI Fouad, DIAF Saida Development and Realization of an Intelligent Power Strip for Energy Consumption Management in Hybrid Wind/Photovoltaic Systems a Centre de Développement des Energies Renouvlables, CDER, 16340, Algiers, Algeria
[2]. S. K. Khadem, M. Basu and M. F. Conlon. Power Quality in Grid Connected Renewable Energy Systems: Role of Custom Power Devices.
[3]. International Conference on Renewable Energies and Power Quality (ICREPQ'10) Granada (Spain) 23rd to 25th March 2010
[4]. Mrs Jaya et al. PIC BASED SOLAR CHARGING CONTROLLER FOR BATTERY. International Journal of Engineering Science and Technology (IJEST).Vol. 4 No.02 February 2012.

Abstract: Slurry is a mixture of liquid combined with some solid particles. There are varieties of pumps used for pumping slurries. Centrifugal slurry pump utilises the centrifugal force generated by a rotating impeller to impart energy to the slurry in the same manner as domestic centrifugal pumps. Slurry pumps are widely being used to transport corrosive/abrasive and high concentration slurries in Industries. The aim of this project is to improve the performance of the slurry pump by optimizing the impeller size. The impeller was modelled in Solidworks 2012 software and CFD analysis was done using fluid flow simulation package. CFD analysis was carried to predict the performance of the pump; a comparative analysis was made with experimental investigations. Four pump impeller models were developed for the critical design parameters of the pump. Inlet diameter, outlet diameter, Inlet angle, outlet angle, Vane number, Vane thickness and impeller width were the parameters which got varied to improve the efficiency of pump.CFD analysis was performed in the virtual models to predict the pump performance before experimental study.CFD results were validated by real time experiments. CFD results reveals that the efficiency of the centrifugal pump filled with optimized was impeller increased from 20.71% to 28.95% of efficiency compared to base line pump. The substantial rise in efficiency of the pump was due to change in vane numbers from 3 to 4 and width from 4.5mm to 5mm

[1]. Miedema, S.A., Lu, Z., Matousek, V., "Numerical Simulation of a Development of a Density Wave in a Long Slurry Pipeline".23rd WEDA Technical Conference & 35th TAMU Dredging Seminar, Chicago, USA, june 2003.
[2]. Hofstra, C.F., & Rhee, C. van, & Miedema, S.A. & Talmon, A.M., "On The Particle Trajectories In Dredge Pump Impellers". 14th International Conference Transport & Sedimentation Of Solid Particles. June 23-27 2008, St. Petersburg, Russia.
[3]. Miedema, S.A., & Riet, E.J. van, & Matousek, V.,"Theoretical Description And Numerical Sensitivity Analysis On Wilson Model For Hydraulic Transport Of Solids In Pipelines". WEDA Journal of Dredging Engineering, March 2002.
[4]. Miedema, S.A., "Considerations on limits of dredging processes".19th Annual Meeting & Technical Conference of the Western Dredging Association. Louisville Kentucky, May 16-18, 1999.
[5]. Graeme R. Addie, Robert J. Visintainer, Mihail C. Roco, Experiences with a numerical method of calculating slurry pump casing wear 1976,1980.
[6]. Hofstra, C. & Hemmen, A. van & Miedema, S.A. & Hulsteyn, J. van, "Describing the position of backhoe dredges".Texas A&M 32nd Annual Dredging Seminar. Warwick, Rhode Island, June 25-28, 2000
[7]. Asuaje M, Bakir F, Kouidri S, Rey R (2004). Inverse design method for centrifugal impellers and comparison with numerical simulation tools. International Journal of Computational Fluid Dynamics 18:101–110
[8]. Asuaje M, Bakir F, Kouidri S, Rey R (2004). Inverse design method for centrifugal impellers and comparison with numerical simulation tools. International Journal of Computational Fluid Dynamics 18:101–110
[9]. Chen SL, Wang WT (2001). Computer aided manufacturing technologies for centrifugal compressor impellers. Journal of Materials Processing Technology 115:284–293.
[10]. Dawes WN, Dhanasekaran PC, Kellar WP, Savill AM (2001). Reducing bottlenecks in the CAD-to-Mesh-to-Solution cycle time to allow CFD to participate in design. Journal of Turbo machinery 123:552–557.

Abstract: Centrifugal pumps are used extensively for pumping water over short to medium distance through pipeline where the requirements of head and discharge are moderate. This project is devoted to enhance the performance of the centrifugal pump through design modification of impeller. Theories on pump characteristics are studied in detail. Vane profile of the impeller is generated using point by point method. The impeller is modelled in Solidworks 2012 software and CFD analysis is done using fluid flow simulation package. CFD analysis enables to predict the performance of the pump and a comparative analysis is made for the entire control volume by varying meshing Pump impeller models have been developed for critical design parameters of the pump. CFD analysis is done in the models to predict the pump performance virtually. Experimental analysis is to be carried out during the second phase of the project work.
Keywords: centrifugal pump, impeller analysis, pump performance, pump characteristics, CFD analysis

[1]. AEA Technology Engineering Software Limited (2000). CFX-TASCflow Computational Fluid Dynamics Software: Primer Manual, Version 2.10.
[2]. Ahn CS, Kim KY (2003). Aerodynamic design optimization of a compressor Rotor with Navier- Stokes analysis. Proceedings of the Institution of Mechanical Engineers. Part A, Journal of Power and Energy.
[3]. Asuaje M, Bakir F, Kouidri S, Rey R (2004). Inverse design method for centrifugal impellers and comparison with numerical simulation tools. International Journal of Computational Fluid Dynamics.
[4]. Byskov RK, Jacobsen CB (2003). Flow in a centrifugal pump impeller at design and off- design conditions—part II: large eddy simulations. Journal of Fluids Engineering.
[5]. Chen SL, Wang WT (2001). Computer aided manufacturing technologies for centrifugal compressor impellers. Journal of Materials Processing Technology.
[6]. Dawes WN, Dhanasekaran PC, Kellar WP, Savill AM (2001). Reducing bottlenecks in the CAD-to-Mesh-to-Solution cycle time to allow CFD to participate in design. Journal of Turbo machinery.
[7]. Fan HY (1998). An inverse design method of diffuser blades by genetic algorithms. Proceedings of the Institution of Mechanical Engineers. Part A, Journal of Power and Energy 212:261–268.
[8]. Flathers MB, Bache GE (1999). Aerodynamically induced radial forces in a centrifugal gas compressor. Journal Engineering for Gas Turbines & Power
[9]. Greenman RM, Roth KR (1999). High-lift optimization design using neural networks on a multi-element airfoil. Journal of Fluids Engineering
[10]. Langthjem MA, Olhoff N (2004). A numerical study of flow-induced noise in a two- dimensional centrifugal pump. Journal of Fluids and Structures.

Abstract: The experimental setup is analysis of heat transfer rating and system performance. The pipe heat exchanger consist of single pipe with circular fins. This fins are arranged in vertically across the inside of the pipe in periodic distance with opposite sides. The fins immersed to inside of the pipe up to semi-circular and remaining part project to over the pipe. Hot fluid enters to one end and leave the cold fluid another end. The hot fluid flow with turbulent flow of inside of the pipe. This flow is increase the effectiveness of heat transfer rating due to more contact surface. Calculate the convective heat transfer with conduction on the pipe with fins. This arrangement is especially to increase heat transfer area, change the flow direction and reduce the cooling time with compact size. The design values are theoretically calculated then fabricate, analysis by standard parameter of existing heat exchanger.
Key Words: Heat transfer, circular fins, and effectiveness.

[1]. Cheng L, Luan T, Du W J, et al. Heat transfer enhancement by flow-induced vibration in heat exchangers. Int J Heat Mass Transfer, 2009, 52: 1053–1057
[2]. Guo J F, Xu M T, Cheng L. Principle of equipartition of entransy dissipation for heat exchanger design. Sci China Tech Sci, 2010, 53: 1309–1314
[3]. Guo J F, Xu M T, Cheng L. The entransy dissipation minimization principle under given heat duty and heat transfer area conditions.Chinese Sci Bull, 2010, 55: 3141–3146
[4]. Chato J C, Leverman R J, Shah J M. Analysis of parallel flow multistream heat exchangers. Int J Heat Mass Transfer, 1971, 14: 1691–1703
[5]. Paffenbarger M. General computer analysis of multistream plate fin heat exchanger. In: Shah R K, Krause A D, Etzger D M, eds. Compact Heat Exchanger-A Festschrift for London A L. New York: Hemisphere Publishing, 1990. 727–746
[6]. Roetzel W, Spang B. Design of heat exchangers. In: VDI, VDI-GVC. VDI Heat Atlas. Dusseldorf: VDI-Verlag, 1993
[7]. Sekulć D P, Shah R K. Thermal design theory of three-fluid heat exchanger. Adv Heat Exchanger, 1995, 26: 219–327
[8]. Shah R K, Sekulć D P. Nonuniform heat transfer coefficients in conventional heat exchanger design theory. ASME J Heat Transfer, 1998, 119: 520–525
[9]. A. K. Sen and S. Trinh, An exact solution for the rate of heat transfer from a rectangular fin governed by a power law-type temperature dependence,ASME J. of Heat Transfer 108 (1986) 457-459
[10]. S. Abrate and P. Newnham, Finite element analysis of triangular fins attached to a thick wall, Computers and Structures 57 (6) (1995) 945-957.

Abstract: As energy demand around the world is increasing day-by-day, wind energy is the good option for energy generation. The most common type of wind turbine is horizontal axis wind turbine (HAWT), but there exist other types. In this paper four different wind turbines are considered, three vertical axis wind turbines (VAWT): the Savonious, the Darrieus, the Giromill or H-rotor; and the HAWT. This study deals with the comparative study of these four different types of wind turbines from the most important aspects including design, construction, maintenance, blade profile. In this study it has been found that VAWT is more advantageous over HAWT in several aspects. Furthermore, different economic, environmental, technical and social issues related with wind energy are discussed.
Keywords— Darrieus, Giromill, HAWT, H-rotor, Savonious, VAWT.

[1] G. D. Rai. Non-Conventional Energy Sources. Khanna Publishers, ISBN No. 81-7409-073-8, Fourth Edition, Delhi, 2008, pg. 227-310.
[2] S. Erikson, H. Berhoff, M. Leijon. Evaluation of Different Turbine Concepts for Wind Power. Renewable and Sustainable Energy Reviews, 2008, vol. 12, pg. 1419-1434.
[3] R. Mittal, K. S. Sandhu, D. K. Jain. An Overview of Some Important Issues Related to Wind Energy Conversion System. .Int. J. of Environmental Science and Development, ISSN: 2010-0264, vol. 1(4), pg. 351-363.
[4] R. Mittal, K. S. Sandhu, D. K. Jain. Controlled Operation of Variable Speed Driven PMSG for Wind Energy Conversion System. WSEAS Transactions on System, vol. 8(2), 2009, pg. 189-199.
[5] T. S. Jaydev. Windmills Stage a Comeback. Nov., IEEE Spectrum, Pg. 45-49.
[6] J. Beurskem and P. M. Jensen. Economics of Wind Energy Prospects and Directions. Renewable Energy World, vol. 4(4), pg. 103-121.
[7] C. A. Morgan, P Gardner, I. D. Mays, M. B. Anderson. The Demonstration of a Stall Regulated 100 kW Vertical Axis Wind Turbine. In: Proceeding 1989 European Wind Energy Conference, Glasgow, Scotland, pg. 645-649.
[8] V. A. Tucker. Using a Collision Model to Design Safer Wind Turbine Rotors for Birds. J. Sol Eng. 1996, 118.
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Abstract: The main aim of this project is to reduce the stress act on the shaft. This project leads to the stress optimization of the shaft. By producing a middle disc we reduced the stress developed on the shaft. So, that there is increase in shaft life. By applying various thickness of the middle disc we increase the life of the shaft. There is a chance for reducing the weight of the component by using light weight material. The load distribution on the shaft is even with the supporting discs. So, that we reduce the total load act on the particular contact on shaft. The main components are shaft, disc, cylinder, and hub. Designing units of this kind requires precise calculations of all loads in static conditions. In this paper the component cross section was analyzed. The stress analysis using ansys is performed on the cross section of assembly of the reclaimer pulley considered as a reference for the existing design and even for the altered design which is the main task of this project. The cross section of the model was analyzed with the simple loading conditions. With that the cylinder deflection is minimized in the cross section analysis.
Key words: reclaimer pulley, design, calculating diameter, altering the design, analysis

[1]. Wolf Tim, Effects of drive Assembly-overhung loads o belt conveyor and pulley design, SME published in 2000 [5] Sheldon, Jerome F Conveyor belt pulleys- design features sme published in 1971.
[2]. O.Evans used of belt conveyors in United States "Millers guide" published in Philadelphia in 1795.
[3]. Reicks, Allen P.V, P.E "Pulley design with corresponding high reliability. [9] A G L Pratt Inclined Troughed Belt Conveyor system for underground Mass Mining Operations AUSIMM (the mineral institute) published in 2008
[4]. Utley, Ronald Belt conveyor Transport systems Published in AUSIMM (The mineral institute) in 2006.
[5]. International Journal of Engineering Research & Technology (IJERT) Vol. 1 Issue 7, September - 2012 ISSN: 2278-0181
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[7]. J.A. Martins, I. Kövesdy, I. Ferreira. Fracture analysis of collapsed heavy-duty pulley in a long-distance continuous conveyors application. Engineering Failure Analysis.Volume 16, Issue 7, October 2009, Pages 2274–2280.

Abstract: With energy consumption and the development of exploitation technology of oil and gas underground, the drilling engineering has developed toward the direction of deep well .The problem of fatigue of drill string has a great effect to drilling engineering. Strong vibration is one of the main reasons that induce drill string fatigue. This paper contains the study about vibration analysis for drill string considering with and without damping effect using Finite Element Analysis (FEA).The aim of this paper is to apply ANSYS software to determine the natural vibration modes and forced harmonic frequency response for drill string. This analysis is to find the natural frequency and harmonic frequency response of drill string in order to prevent resonance for drill string. From the result, this analysis can show the range of the frequency that is suitable for drill string which can prevent maximum amplitude and stress.

[1]. F. Abbassian and V. A. Dunayevsky, "Application of stability approach to torsional and lateral bit dynamics," Paper 30478-PA, in Proc. of SPE Ann. Technical Conf. and Exhibition, Dallas, TX, 1998, pp. 99-107.
[2]. F. H. Deily, D. W. Dareing, G. H. Paff, J. E. Ortloff, and R. D. Lynn, "Down hole measurements of drill string forces and motions," ASME J. of Eng. for Ind., May 1968, pp. 217-225.
[3]. R. I. Leine, D. H. van Campen, and W. J. G. Keultjes, "Stick-slip whirl interaction in drillstring dynamics," ASME J. of Vibration and Acoustics, vol. 124, no. 2, April 2002, pp. 209-220.
[4]. R. I. Clayton and B.S. Ivie, "Development of whirl resistant PDC bits," SPE Paper 26964, in Proc, Latin American /Caribbean Petroleum Eng. Conf., Buenos Aires, Argentina, April 27-29, 1994, pp. 625-637.
[5]. S. A. Al-Hiddabi, B. Samantha, and A. Seibi, "Non-linear control of torsional and bending vibrations of oilwell drillstrings," ASME J. of Sound and Vibration, vol. 265, no. 2, pp. 401-415, Aug. 2003.
[6]. T. M. Warren, J. F. Brett, and L. A. Sinor, "Development of a whirl- resistant bit," SPE Paper 19572, in Proc. of SPE 64th Ann. Technical Conf. and Exhibition, San Antonio, TX, Oct. 8-11, 1989, pp. 537-552.
[7]. M. Elsayed and D. W. Raymond, "Analysis of coupling between axial and torsional vibrations in a compliant model of a drill string equipped with a PDC bit," Paper ETCE2002/Struc-29002, in Proc. of the ASME, ETCE Conf., Houston, TX, Feb. 2002, pp. 1-8.
[8]. L. E. Miller and H. M. Rollins, "Evaluation of vibration damping tool and of drill stem torque requirements from data recorded by an instrumented drill stem member," ASME J. of Eng. for Ind., pp. 226- 230, May 1968.
[9]. C. A. Zamudio, J. Tlusty, and D. W. Daering, "Effect of shock absorber on drag bit chatter," SPE Paper 17194-MS, SPE/IADC Drilling Conf., Richardson, TX, Feb. 28- March 2, 1988, pp. 153-160.
[10]. M.A.Elsayed, and C.Aissi, "Analysis of shock absorber characteristics for drillstrings," Paper ESDA2006- 95141, in Proc. of ASME ESDA Conf., 2006.