İzelu Christopher OKECHUKWU, Agberegha Orobome LARRY, Oguntuberu Olusola BODE

Wind Energy Conversion System for Electrical Power Generation in UNIPORT and UPTH, Port Harcourt, Rivers State, Nigeria

Abstract- As one of the fifth major urban cities in Nigeria, high demand for electricity in Port Harcourt, Rivers State, Nigeria is evident, and hence, requires high installed capacity for steady conventional source. At present this is hardly met, coupled with its attendant risk of undesirable emissions and other disadvantages. This paper considers that the conventional energy source may be supported or entirely replaced by the alternative renewable sources to meet demands for electricity as well as minimize the risk of undesirable emissions including other limitations of the conventional sources. It therefore presents a study of wind energy conversion system to be installed along the Choba banks of the New Calabar River. The system should be capable of serving electricity need of the University of Port Harcourt and the University of Port Harcourt Teaching Hospital all in Port Harcourt. The study focused on the horizontal axis wind farm turbine rotor aerodynamic performance analysis using the blade element momentum theory and economic evaluation of the wind energy conversion system. It showed that, to meet with the total power requirement of 21 [MW] in the University and its teaching hospital for a projected period of 20 years, rotor blades of each of the wind farm turbine optimally designed for capacity of 1.5 [MW], wind velocity of 17.5 [m/s], and for airfoil shape of NACA 2412 are desired. The power and torque of the designed blades having positive non linear relationship with wind velocity must be achieved. Besides, an economic study of the system revealed savings in costs of N8, 633,032,101.98 as compared with the existing diesel plant.

Keywords:

Key Words: Port Harcourt, Nigeria, Wind Energy Conversion System, Horizontal Axis Wind Turbine Blade Element Momentum Theory, Turbine Rotor Blade, Aerodynamic Performance,

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Website: http://en.wikipedia.org/wiki/Port_Harcourt, Extracted on 2013, pp 1 – 7
Izelu, C. O., Agberegha, O. L. and Oguntuberu, O. B, Wind Resource Assessment for Wind Energy Utilization in Port Harcourt, River State, Nigeria, Based on Weibull Probability Distribution Function, International Journal of Renewable Energy Research, Vol. 3, No. 1, 2013, pp 180 – 185
Johnson, G. L., Wind Energy Conversion Systems, Electronic Edition, 2006, pp 1 – 449
Munteanu, I., Bratcu, A. I., Cutululis, N. A. and Ceanga, E., Wind Energy conversion System, Optimal Control of Wind Energy Systems Towards a Global approach, 2008,
XXII, 283 p. 203 illus, Chapter 2, pp 9 – 27 Stiebler, M., Wind Energy Conversion Systems Electric Power Generation, Springer Series in Green Energy and Technology, Springer-Verlag Berlin Heidelberg, 2008, pp – 201
Abarzadeh, M., Kojabadi, H. M. and Chang, L., Small Scale Wind Energy Conversion Systems, Wind Turbine, in Tech, 2011, pp 639 – 652
Ragheb, M and Ragheb, A. M., Wind Torbine Theory – The Betz Equation and Optimal Rotor Tip Speed Ratio, Fundamental and Advanced Topics in Wind Power, , In Tech, www.intechopen.com, pp 19 – 38 Ingram, G., Wind Turbine Blade Design using the Blade Element Momentum Method, Version 1.0, School of engineering, Durham University, 2005, pp 1 – 21
Ingram, G., Wind Turbine Blade Design using the Blade Element Momentum Method, Version 1.1, School of engineering, Durham University, 2011, pp 1 – 21
Cowgill, R. T., Fouts, J., Haley, B. and Whitham, C., Wind Turbine Rotor Design: Final Design Report, College of Engineering, Boise State University, 2006, pp – 36
Schubel, P. J. and Crossley, R. J., Wind Turbine Blade Design, Energies, 2012, Vol. 5, pp 3425 – 3449
Tenguria, N., Mittal, N. D. and Ahmed, S., Investigation of Blade Performance of Horizontal Axis Wind Turbine based on Blade Element Momentum Theory (BEMT) using NACA Airfoils, International Journal of Engineering, Science and Technology, Vol. 2, No. 12, 2010, pp 25 – 35
Shateri, A. R., A New Evolutionary Algorithm for Aerodynamic Design Optimization of Axis Wind Turbine, Advances in Natural and Applied Sciences, Vol. , No. 2, 2012, pp 147 – 152
Rathore, A. S. and Ahmed, S., Aerodynamic Analysis of Horizontal Axis Wind Turbine By Differential Blade Airfoil Using Computer Program, IOSR Journal of Engineering, Vol. 2, Issue 1, 2012, pp – 123
Leishman, J. G., Challenges in Modeling the Unsteady Aerodynamics of Wind Turbines, American Institute of Aeronautics and Astronautics, 2002, pp 1 – 28
Bak, C., Fuglsang, P., Sorensen, N. N., Madsen, H. A., Shen, W. Z, and Sorensen, J. N., Airfoil Characteristics for Wind Turbines, Information Service Department, Riso National Laboratory, Roskilde, 1999, pp 1 – 51
Zhang, J., Numerical Modeling of Vertical Axis Wind Turbine (VAWT), MSc Thesis, Department of Mechanical Engineering, Technical University of Denmark, 2004, pp 1 – 88
Claessens, M. C., The Design and Testing of Airfoils for Application in Small Vertical Axis Wind Turbines, Engineering, Delft University of Technology, 2006, pp 1 – 113 Faculty of Aerospace
Ahlstrom, A., Aeroelastic Simulation of Wind Turbine Dynamics, PhD Thesis, Royal Institute of Technology, Department of Mechanical Engineering, , Sweden, pp 1 – 154 Martens, A. H. J. A and Albers, P. H. W. M., Wind turbine Study: Investigation into CVT Application in Wind Turbines, Technische Universitiet Enidhoven, , pp 1 – 31 Khemiri, N., Khedher, A., and Mimouni, M. F., Wind Energy Conversion System using DFIG Controlled by Back-stepping and Sliding Mode Strategies, International Journal of Renewable Energy Research, Vol. 2, No. 3, 2012, pp 421 - 434
Belfedhal, S. A., Berkouk, E., Meslem, Y. and Soufi, Y., Modeling and Control of Wind Power Conversion System with a Flywheel Energy Storage System International Journal of Renewable Energy Research, Vol. 2, No. 3, 2012, pp 528 – 534 Reactive power,
Website:http://en.wikipedia.org/wiki/nasa_airfoil, Extracted on 2013, pp 1 – 6
Jacob, E. N., Ward, K. E. and Pinkerson, R. M., the Characteristics of 78 Related Airfoils Sections from Tests in the Variable-Density Wind Tunnel, NACA Report No. , 1935
Moran, J., An Introduction to Theoretical and Computational Aerodynamics, Dover, 2003, p 7
Light, T. and Robinson, J., Aerodynamic Design of a Large Horizontal-Axis Wind Turbine, London, 2003, p Website: www.alibaba.com/windturbinemanufacturers, Extracted on 27/11/2009.
Barrett, J., Giuffre, D., Haughton, J. and Tuerck, D. G., an Economic Analysis of a Wind Farm in Nantucket Sound, Beacon Hill Institute, Suffolk University, Suffolk, Appendix Table 1: Current Consumption for each Power Station and the Corresponding Line Voltage S/N Power Station Current Consumption for Seven (7) Days Average of Red-Yellow-Blue (Amperes) Day-1 Day-2 Day-3 Day-4 Day-5 Day-6 Day-7 Delta/Choba Park Abuja Ghana-Ama/Gambia-Ama 900 Average line Voltage: 415 [volt], 3-phase supply Source: Department of Works, UNIPORT, 19/06/2009
Table 2: Data for analysis of Alternative A COST ELEMENT QUANTITY UNIT Diesel price per litre as @ 01/01/2010 N /litre]
Inflation rate in Nigeria %] Engine oil cost per 3 months ,200.00 N] Diesel consumption rate of 3 plants per week 33000 litres]
Table 5: Summary of economic evaluation of alternatives ECONOMIC PARAMETERS VALUE (N) Total cost of diesel power (Alternative A) ,463,032,101.98 Total cost of wind power (Alternative B) ,830,000,000 Benefits of Alternative B over Alternative A: Fuel cost Saved Engine oil cost saved Maintenance Cost Saved Emission Reduced Greater Energy Independence ,534,891,836.68 ,026,087.82 ,114,177.48 Total savings accrued by implementing Alternative B 8,633,032,101.98