Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 489 for “"Wind speed"”.
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Quantifying hurricane wind speed with undersea sound
Hurricanes, powerful storms with wind speeds that can exceed 80 m/s, are one of the most destructive natural disasters known to man. While current satellite technology has made it possible to effectively detect and track hurricanes, expensive 'hurricanehunting' aircraft are required to accurately …
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Modelling of the near-surface wind speed
Das Wissen über die oberflächennahe Windgeschwindigkeit und deren Vorhersage ist von größtem Interesse für eine Vielzahl von Anwendungen, einschließlich der Windenergie. Für die vorliegende Arbeit wurden folgende Aspekte untersucht: i) die Variabilität des Windes in der Vergangenheit über …
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Quantifying hurricane wind speed with undersea sound
Hurricanes, powerful storms with wind speeds that can exceed 80 m/s, are one of the most destructive natural disasters known to man. While current satellite technology has made it possible to effectively detect and track hurricanes, expensive 'hurricane-hunting' aircraft are required to accurately …
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Correlation of cloud height and wind speed
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Meteorology, 1961.
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Verification of gridded seasonal wind speed forecasts over South Africa.
… provisional global and Southern African seasonal wind forecasts generated using the United Kingdom Meteorological Office Atmospheric General Circulation Model (AGCM) HadAM3P (non-standard version of HadAM3). This study examines the quality of the seasonal wind speed forecasts through a forecast …
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Outdoor wind speed enhancement in residential precincts in tropical cities
Wind speeds in urban areas are significantly reduced due to the blockage effects of urban structures. Lower wind speeds inhibit passive ventilation and reduce thermal comfort in tropical cities. This thesis uses both experimental and computational fluid dynamics (CFD) modeling to explore the …
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Short-Term Wind Speed Time Series Forecasting Using Artificial Neural Networks
<p>Renewable energies such as wind power have become integral parts of modern power networks. Short-term wind speed prediction is crucial for smart grids, as it can help balance the demand and supply, as well as set the energy price in the market.</p> <p>In this thesis, we simulate and compare …
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Quantifying the relationship between wind turbine component failure rates and wind speed
Onshore wind turbine technology has matured to the point when assets are now expected to produce availabilities greater than 97%. The wind speed a wind turbine operates in has an impact on its reliability. Hitherto this relationship has not been defined, quantified or used to undertake analysis to …
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A short-term ensemble wind-speed forecasting system for wind power applications
Accurate short-term wind speed forecasts for utility-scale wind farms will be crucial for the U.S. Department of Energy’s (DOE) goal of providing 20% of total power from wind by 2030. For typical pitch-controlled wind turbines, power output varies as the cube of wind speed over a significant …
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The trend of wind speed over the United States during 1998 - 2011
… studies. The decreasing trend of near-surface wind speed is statistically significant (p<0.01). However, the statistical significance of the decreasing trend drops with increases in altitude. We identified a largest negative trend in wind speed close to the surface. The magnitude of this …
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Hurricane Wind Speed And Rain Rate Retrieval Algorithm For The Stepped Frequency Microwave Radiometer
… (HIRA) for the measurement of oceanic surface wind speed and rain rate in hurricanes. The HIRA is designed to process airborne microwave brightness temperatures from the NOAA, Stepped Frequency Microwave Radiometer (SFMR), which routinely collects data during NOAA hurricane hunter aircraft …
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Quantifying the effects of airflow distortion on anemometer wind speed measurements from merchant ships
… have been carried out experimentally using a low-speed wind tunnel and numerically using a commercial Computational Fluid Dynamics (CFD) code VECTIS. The investigations examined the airflow over simple block models of VOS shapes. The results of the investigations were compared to wind speed …
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Optimizing peak gust and maximum sustained wind speed estimates from mid-latitude wave cyclones
Wind storms cause significant damage and economic loss and are a major recurring threat in many countries. Maximum sustained and peak gust weather station data from multiple historic wind storms occurring over more than three decades across Europe were analyzed to identify storm tracks, …
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An Improved Microwave Radiative Transfer Model For Ocean Emissivity At Hurricane Force Surface Wind Speed
… surface under the forcing of strong surface winds in hurricanes is being developed. This ocean emissivity model will be incorporated into a larger radiative transfer model used to infer ocean surface wind speed and rain rate in hurricanes from remotely sensed radiometric brightness …
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Optimization of wind-solar energy systems using low wind speed turbines to improve rural electrification
… on renewable energy technologies, namely Wind Turbine (WT) and Photovoltaic (PV) systems. They have been developed and applied to RE because they are simple and environmentally friendly. They can be installed as separate units and they are sustainable alternative energy solutions. …
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Wind Speed Forecasting for Power Generation Using a Self-Assembling Closed-Loop Recurrent Neural Network
… as a time series forecasting method for wind speed prediction. We compare its multi-step prediction performance against a proven recurrent neural network, NARX (Non-linear Auto-Regressive neural network with eXogenous inputs), on several univariate and multivariate time series, including …
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Cooling rates of dummies under various degrees of air humidity, wind speed and air temperature
… was to correlate measured air flow rates (wind speed) and measured relative air humidity levels (RH) with post-mortem cooling rate in order to formulate appropriate corrective factors to be used with Henssge’s Nomogram. The effect of air flow rates and air humidity on the post-mortem …
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Bird Abundance at Bird Feeders in Response to Temperature, Wind Speed and Precipitation During the Winter Season
… attributes are lower than average temperatures, wind speed and precipitation level. Information about the bird species and all of the data associated with them is provided by Project FeederWatch (PFW). This is a citizen based survey study that provides key information about bird species abundance …
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Wind wave tank for experimental investigation of momentum and enthalpy transfer from the ocean surface at high wind speed
… easily performed on the high seas. Therefore, a wind wave tank has been constructed in which a few aspects of a tropical storm are simulated. The air velocity inside the annular tank is comparable to that of hurricane. However, the three dimensionality of the tank obscures the quantitative …
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Analysis of alternative methods for long-term wind speed and initial site assessment for purposes of wind energy production estimation
… and evaluation of viable sites for wind energy. However, this is made difficult by the site-specific nature of the wind. A review of current industry practices shows that linear regression is the preferred method, although little work has been done to investigate alternative …
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