Theoretical Study of Wind Turbine Model with a New Concept on Swept Area

Sagarkumar M. Agravat^1*, N. V. S. Manyam², Sanket Mankar³, T. Harinarayana¹

¹Gujarat Energy Research and Management Institute, Gandhinagar, India.
²Department of Electrical Engineering, University of Petroleum and Energy Studies, Dehradun, India.
³School of Mechanical and Building Sciences, Vellore Institute of Technology, Vellore, India.

DOI: 10.4236/epe.2015.74012                

Abstract

Commercially available wind-turbines are optimized to operate at certain wind velocity, known as rated wind velocity. For other values of wind velocity, it has different output which is lower than the rated output of the wind plant. Wind mill can be designed to provide maximum power output at different wind velocities through modification of swept area to match with the wind speed available at the moment. This can result in higher power output at all the velocities except that at rated wind speed because of limitation of generator. This results in increased utilization of generation capacity of wind mill compared to its commercially designed counterpart. A theoretical simulation has been done to prove a new concept about swept area of wind turbine blade which results in a significant increase in the power output through the year. Simulation results of power extracted through normal wind blade design and new concept are studied and compared. The findings of the study are presented in graphical and tabular form. Study establishes that there can be a significant gain in the power output with the new concept.

Keywords

Cut-In Wind-Speed, Cut-Out Wind-Speed, CUF, Swept Area, Radius, Chord, Aerofoil, Axial Flow Induction Factor, Inflow Factor, Actuator Disc Concept, Momentum Theory

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	CEA Report (2013) http://cea.nic.in/reports/yearly/annual_rep/2012-13/ar_12_13.pdf
[2]	Madhu, S. et al. (2014) A Review of Wind Energy Scenario in India. International Journal of Environmental Sciences, 3, 87-92.
[3]	Sing, C. (2012) Variable Speed Wind Turbine. International Journal of Engineering Science, 2, 652-656.
[4]	Li, H. and Chen, Z. (2009) Design Optimization and Site Matching of Direct-Drive Permanent Magnet Wind Power Generator Systems. Renew. Energy, 34, 1174-1185. http://dx.doi.org/10.1016/j.renene.2008.04.041
[5]	Eminoglu, U. and Ayasun, S. (2014) Modeling and Design Optimization of Variable-Speed Wind Turbine Systems. Energies, 7, 402-419. http://dx.doi.org/10.3390/en7010402
[6]	Fingersh, L., Hand, M. and Laxson, A. (2006) Wind Turbine Design Cost and Scaling Model; Technical Report NREL/TP-500-40566. National Renewable Energy Laboratory (NREL), Golden.
[7]	Diveux, T., Sebastian, P., Bernard, D., Puiggali, R.J. and Grandidier, J.Y. (2001) Horizontal Axis Wind Turbine Systems: Optimization Using Genetic Algorithms. Wind Energy, 4, 151-171. http://dx.doi.org/10.1002/we.51
[8]	Fuglsang, P., Bak, C., Schepers, J.G., Bulder, B., Olesen, A., van Rossen, R. and Cockerill, T. (2010) Site Specific Design Optimization of Wind Turbines; Technical Report JOR3-CT98-0273. National Laboratory Riso, Roskilde.
[9]	Collecutt, G.R. and Flay, R.G. (1996) The Economic Optimization of Horizontal Axis Wind Turbine Design Parameters. Journal of Wind Engineering and Industrial Aerodynamics, 61, 87-97. http://dx.doi.org/10.1016/0167-6105(96)00048-7
[10]	Fuglsang, P. and Bak, C. (2002) Site-Specific Design Optimization of Wind Turbines. Wind Energy, 5, 261-279. http://dx.doi.org/10.1002/we.61
[11]	Kongam, C. and Nuchprayoon, S. (2010) A Particle Swarm Optimization for Wind Energy Control Problem. Renewable Energy, 35, 2431-2438. http://dx.doi.org/10.1016/j.renene.2010.02.020
[12]	Fuglsang, P. and Madsen, H.A. (1999) Optimization Method for Wind Turbine Rotors. Journal of Wind Engineering and Industrial Aerodynamics, 80, 191-206. http://dx.doi.org/10.1016/S0167-6105(98)00191-3
[13]	Maki, K., Sbragio, R. and Vlahopoulos, N. (2012) System Design of a Wind Turbine Using a Multi-Level Optimization Approach. Renewable Energy, 43, 101-110. http://dx.doi.org/10.1016/j.renene.2011.11.027
[14]	Muljadi, E. and Butterfield, C.P. (1999) Pitch-Controlled Variable-Speed Wind Turbine Generation. IEEE Transactions on Industry Applications, 37, 240-246.
[15]	Talavera Juan, A. and Cassarrubios Francisco, J. (2005) Swept Area Regulation for Increased Energy Output in Off-Shore Wind Turbine. http://wind.nrel.gov/public/SeaCon/Proceedings/Copenhagen.Offshore.Wind.2005/documents/papers /Poster/J.A.Talavera_SweptAreaRegulationforIncreasedEnergy.pdf
[16]	http://www.powersails.com/powersails/adjustable-swept-area-asa/
[17]	Dawson Mark, H. (2006) Variable Length Wind Turbine Blade. Project Report.