Browse > Article
http://dx.doi.org/10.12791/KSBEC.2015.24.3.135

Analysis of Wind Velocity Profile for Calculation of Wind Pressure on Greenhouse  

Jung, Seung-Hyeon (Department of Agricultural Engg., Kyungpook National Univ.)
Lee, Jong-Won (Institute Agricultural Science & Technology, Kyungpook National Univ.)
Lee, Si-Young (Department of Agricultural Engg., National Academy of Agricultural Science, RDA)
Lee, Hyun-Woo (Department of Agricultural Engg., Kyungpook National Univ.)
Publication Information
Journal of Bio-Environment Control / v.24, no.3, 2015 , pp. 135-146 More about this Journal
Abstract
To provide the data necessary to determine the design wind speed for calculating the wind load acting on a greenhouse, we measured the wind speed below 10m height and analyzed the power law exponents at Buan and Gunwi. A wind speed greater than $5m{\cdot}s^{-1}$ is appropriate for calculating the power law exponent necessary to determine the wind speed distribution function according to height. We observed that the wind speed increased according to a power law function with increased height at Buan, showing a similar trend to the RDC and JGHA standards. Therefore, this result should be applied when determining the power law function for calculating the design wind speed of the greenhouse structure. The ordinary trend is that if terrain roughness increases the value of power law exponent also increases, but in the case of Gunwi the value of power law exponent was 0.06, which shows contrary value than that of the ordinary trend. This contrary trend was due to the elevations difference of 2m between tower installed and surrounding area, which cause contraction in streamline. The power law exponent started to decrease at 7 am, stopped decreasing and started to increase at 3 pm, and stopped increasing and remained constant at 12 pm at Buan. These changes correspond to the general change trends of the power law exponent. The calculated value of the shape parameter for Buan was 1.51, confirming that the wind characteristics at Buan, a reclaimed area near the coast, were similar to those of coastal areas in Jeju.
Keywords
agricultural open terrain; greenhouse structural design standard; low rise structure; power law exponent; terrain roughness;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Al-Abbadi, N.M. and S. Rehman. 2009. Wind speed and wind power characteristics for Gassim, Saudi Arabia. Int'l J. Green Energy 6(2):201-217.   DOI
2 Architectural Institute of Japan (AIJ). 2004. Recommendations for loads on buildings.
3 Architectural Institute of Korea (AIK). 2009. Korean building code and commentary (in Korean).
4 Capps, S. B. and Zender, C. S. 2008. Observed CAM3 GCM sea surface wind speed distributions: characterization, comparison, and bias reduction. J. Climate, 21(24):6569-6585.   DOI
5 Choi, M.G., S.W. Yun, H.T. Kim, S.Y. Lee and Y.C. Yoon. 2014. Current status on the greenhouse foundation. Journal of Agriculture & Life Science 48(3):251-260 (in Korean).   DOI
6 Clobes, M., A. Willecke and U. Peil. 2011. Shape-dependent characteristics of full-scale wind profiles. J. Wind Engg. and Ind. Aerodyn. 99(9):919-930.   DOI
7 Davenport, A.G. 1960. Rationale for determining design wind velocities. J. Struct. Engg. ASCE86:39-68.
8 Farrugia, R.N. 2003. The wind shear exponent in a Mediterranean island climate. Renewable Energy 28(4):647-653.   DOI
9 Gualtieri, G. and S. Secci. 2011. Wind shear coefficients, roughness length and energy yield over coastal locations in southern Italy. Renewable Energy 36(3):1081-1094.   DOI
10 Ha, Y.C. 1998. Characteristic of wind profile according to change in ground surface roughness. Wind Engineering Institute of Korea 2(2):171-178 (in Korean).
11 Hanafusa, T., C.B. Lee and A.K. Lo. 1986. Dependence of the exponent in power law wind profiles on stability and height interval. Atmospheric Environment 20(10):2059-2066.   DOI
12 Japan Greenhouse Horticulture Association (JGHA), 1997. Standard for structural safety of greenhouse. Tokyo: Japan Greenhouse Horticulture Association (in Japanese).
13 Jung, S.H., H.W. Lee, J.W. Lee, W.H. Na and S.Y. Lee. 2014a. Comparison of wind pressure calculation formula for greenhouse structure design in some nations standard. Proceedings of the Korean Society for Bio-Environment Control Conference 23(1):189-190 (in Korean).
14 Jung, S.H., H.W. Lee, J.W. Lee, W.H. Na and S.Y. Lee. 2014b. Comparison of snow loads calculation standards for greenhouse structure design in some nations. Proceedings of the Korean Society for Bio-Environment Control Conference 23(2):169-170 (in Korean).
15 Kim, M.K., Nam, S.W., Suh, W.M., Yoon, Y.C., Lee, S.G. and Lee, H.W. 2000. Agricultural structure engineering. Hyangmoonsa (in Korean).
16 Kim, H.G. and J.O. Choi. 2002. Calculation of wind profile exponent in Pohang area. Wind Engineering Institute of Korea 6(1):47-52 (in Korean).
17 Kwon, D.K. and A. Kareem. 2013. Comparative study of major international wind codes and standards for wind effects on tall buildings. J. Engg. Struct. 51:23-35   DOI
18 Kim, H.G. 2012. Analysis on wind profile characteristics in a sublayer of atmospheric boundary layer over a semi-complex terrain. J. Env. Sci. 21(2):145-152 (in Korean).
19 Kim, R.U., D.W. Kim, K.C. Ryu, K.S. Kwon, and I.B. Lee. 2014. Estimation of wind pressure coefficients on even-span greenhouse built in reclaimed land according to roof slope using wind tunnel. Protected Horticulture and Plant Factory. 23(4):269-280 (in Korean).   DOI
20 Ko, J.W., Quan, H.C. and Lee, B.G. 2012. The study on assessment of roughness coefficient for designing wind farm in Jeju island. J. Korean Society for Geo-Spatial Information System 20(2):15-22 (in Korean).
21 Lassig, J.L., M.G. Cogliati, M.A. Bastanski and C. Palese. 1999. Wind characteristics in Neuquen, north Patagonia, Argentina. J. Wind Engg. and Ind. Aerodyn. 79(1-2):183-199.   DOI
22 Lee, B.G., S.J. Moon, and J.W. Ko. 2013. Power law exponent in coastal area of northeastern Jeju island for the investigation of wind resource. J. Korean Society for Geo-Spatial Information System 21(4):65-71 (in Korean).
23 Li, Q.S., L. Zhi and F. Hu. 2010. Boundary layer wind structure from observations on a 325m tower. J. Wind Engg. and Ind. Aerodyn. 98(12):818-832.   DOI
24 Liu, H. 1990. Wind Engineering - A handbook for structural engineers.
25 Ministry of Agriculture, Food and Rural Affairs (MAFRA). 1999. Greenhouse structure design standards and explanations (in Korean).
26 Peil, U. and G. Telljohann. 1999. A wind turbulence model based on long-term measurements. Wind Engineering into The 21st Century - Proceedings of The 10th International Conference on Wind Engineering. Copenhagen, Denmark, 147-153.
27 Ministry for Food, Agriculture, Forestry and Fisheries(MIFAFF), Rural Development Administration(RDA). 2010. Designated notice of standards to endure disaster for horticultural and special facilities (in Korean).
28 National Greenhouse Manufactures Association (NGMA). 2004. Structural design manual. ed. NGMA, PA, USA.
29 Netherlands Standardization Institute (NEN). 2004. Greenhouses : Design and construction - Part1 : Commercial production greenhouses.
30 Pryor, S. and R. Barthelmie. 2009. Historical trends in nearsurface wind speeds. Indiana University Press. In Understanding Climate Change, chapter 15:169-183.
31 Ro, K.S. and P.G. Hunt. 2007. Characteristic wind speed distributions and reliability of the logarithmic wind profile. J. Env. Engg. 133(3):313-318.   DOI
32 Rural Development Corporation(RDC). 1995. Greenhouse structural requirements. ed. RDC, Uiwang, Korea (in Korean).
33 Sen, Z., A. Altunkaynak and T. Erdik, 2012. Wind velocity vertical extrapolation by extended power law. Advances in Meteorology. 2012:Article ID 178623.
34 Smith, K., G. Randall, D. Malcolm, N. Kelly and B. Smith. 2002. Evaluation of wind shear patterns at Midwest wind energy facilities. American Wind Energy Association(AWEA) WindPower 2002 Conference, Portland, OR (US)