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Investigation of Vertical Wind Shear Characteristics Using 50m Meteorological Tower Data | ||
| فیزیک زمین و فضا | ||
| مقاله 4، دوره 43، شماره 4، دی 1396، صفحه 47-53 اصل مقاله (549.26 K) | ||
| شناسه دیجیتال (DOI): 10.22059/jesphys.2017.61678 | ||
| نویسنده | ||
| Poongavanam Sardar Maran* | ||
| Assistant Professor, Centre for Earth & Atmospheric Science Sathyabama Institute of Science and Technology, Chennai, India | ||
| چکیده | ||
| Wind measurement is important for estimating wind energy potential, but it is relatively cost-intensive and often conducted at a narrow height from the ground level. The typical range of most turbine hub heights is from 30-50 m or even higher. Extrapolation on wind data thus becomes necessary to estimate the wind speed at different heights. Doing so requires the essential understanding of wind shear characteristics representative to a location or a region. The analysis is carried out from the vertical profile of meteorological observation collected from 50 m tower at Sathyabama University during the period of 2010-2014. The tower is located near the coastal region in Chennai. The tower is equipped with instruments to measure several meteorological variables. For wind speed and direction, they are routinely measured at different heights, which are considered well suitable for wind shear characterization. In this work, the characteristics of wind shear exponent at the tower were investigated and discussed, with emphasis on temporal (diurnal and monthly) variation and spatial distribution. | ||
| کلیدواژه‌ها | ||
| Wind Energy؛ Wind Shear؛ Surface Roughness؛ Meteorological Tower | ||
| عنوان مقاله [English] | ||
| Investigation of Vertical Wind Shear Characteristics Using 50m Meteorological Tower Data | ||
| نویسندگان [English] | ||
| Poongavanam Sardar Maran | ||
| Assistant Professor, Centre for Earth & Atmospheric Science Sathyabama Institute of Science and Technology, Chennai, India | ||
| چکیده [English] | ||
| Wind measurement is important for estimating wind energy potential, but it is relatively cost-intensive and often conducted at a narrow height from the ground level. The typical range of most turbine hub heights is from 30-50 m or even higher. Extrapolation on wind data thus becomes necessary to estimate the wind speed at different heights. Doing so requires the essential understanding of wind shear characteristics representative to a location or a region. The analysis is carried out from the vertical profile of meteorological observation collected from 50 m tower at Sathyabama University during the period of 2010-2014. The tower is located near the coastal region in Chennai. The tower is equipped with instruments to measure several meteorological variables. For wind speed and direction, they are routinely measured at different heights, which are considered well suitable for wind shear characterization. In this work, the characteristics of wind shear exponent at the tower were investigated and discussed, with emphasis on temporal (diurnal and monthly) variation and spatial distribution. | ||
| کلیدواژه‌ها [English] | ||
| Wind Energy, Wind Shear, Surface Roughness, Meteorological Tower | ||
| مراجع | ||
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Farrugia, R. N., 2003, The wind shear exponent in a Mediterranean island climate, Renewable Energy, 28, 647-653. Gryning, S. E., Batchvarova, E., Brümmer, B., Jørgensen, H. and Larsen, S., 2007, On the extension of the wind profile over homogeneous terrain beyond the surface boundary layer, Boundary-Layer Meteorology, 124, 2, 251–268. Hosomia, M., Kobayashi, H. and Nitta, Y., 1997, Fatigue strength design for vortex-induced oscillation and buffeting of a bridge, Journal of Wind Engineering and Industrial Aerodynamics, 67–68, 227-237. Huschke, R., 1989, Glossary of Meteorology, American Meteorological Society. Landberg, L., Myllerup, L., Rathmann, O., Petersen, E. L., Jorgensen, B. H., Badger, J., and Mortensen, N. G., 2003, Wind resource estimation -an overview, Wind Energy, 6, 261-271. Martano, P., 2000, Estimation of surface roughness length and displacement height from single-level sonic anemometer data, Jnl appl. Met., 39, 708-15. Oke, T. R., 2006, Initial guidance to obtain representative meteorological observations at urbansites. WMO/TD (ed.), Instruments and Observation Methods Rep. No. 81. Oke, T. R., 1987, Boundary Layer Climates, Second ed. Methuen, London. Panofsky, H. A., Tennekes, H., Lenschow, D. H. and Wyngaard, J. C., 1977, The charecteristics of turbulence velocity components in the surface layer under convective conditions, Bounday layer meteorology, 11, 355-361. Panofsky, H. A. and Dutton, J., 1984, Atmospheric Turbulence. John Wiley & Sons, New York. Paton, C. P. and Manomaiphiboon, K., 2013, A Metropolitan Wind Resource Assessment for Bangkok, Thailand Part 1: Wind Resource Mapping, Journal of Sustainable Energy & Environment, 4, 69-76. Rehman, S. and Al-Abbadi, N. M., 2005, Wind shear coefficients and their effect on energy production, Energy Conversion and Management, 46, 2578-2591. Schwartz, M. and Elliott, D., 2006, Wind shear characteristics at Central Plains tall towers, Proceedings of American Wind Energy Association Wind Power 2006 Conference, Pittsburgh, Pennsylvania, US. Stull, R. B., 1988, An Introduction to Boundary Layer Meteorology. Kluwer Academic Publishers, Dordrecht, Boston and London. | ||
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