tailieunhanh - Fundamental and Advanced Topics in Wind Power Part 5

Tham khảo tài liệu 'fundamental and advanced topics in wind power part 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 110 Fundamental and Advanced Topics in Wind Power 5. Conclusions Extreme wind speed from different directions and for return periods of 10 25 50 100 and 200 years were predicted for five different locations in Kuwait Viz. Kuwait International Airport KIA Kuwait Institute for Scientific Research KISR Ras Al-Ardh Failaka Island and Al-Wafra. Measured wind speed by the Meteorological office of KIA is used for this analysis. The wind speeds are measured at 10 m elevation from the ground and the data value is the average of 10 minutes duration. For KIA location data is available for 45 years From 1962 to 2006 . For other locations measured data is available for about 12 years. The annual maximum measured wind speed data at KIA location is used as input for the extreme value analysis for KIA location whereas the monthly maximum measured wind speed data is used for other locations. The extreme 10 minute average wind speeds are predicted based on Gumbel distribution. The wind speed on the earth is dictated by the spatial gradient of the atmospheric pressure which in turn is governed by the temperature gradient. The long term climate change affects the temperature gradients and hence the wind speed. Extreme wind and Gust speed for different return periods is an important input for safe and economic design of tall structures power transmission towers extreme sand movement in desert and its effects on farm land and related infrastructures. The updated wind and Gust speed data from Kuwait International Airport measured data for 54 years from 1957 to 2009 is divided into 3 equal periods . 1957-1974 1975-1992 19932009 each of 18 years duration. Extreme value analysis is also carried out on these three sets of data to understand the climate change effect on the extreme wind speed. The following important conclusions are obtained based on the study - a. Among the five locations selected for the study KIA area is expected to experience the highest wind speed from ENE ESE SSE S .