Sökning: "MERRA"
Hittade 5 uppsatser innehållade ordet MERRA.
1. INVESTIGATION OF POTENTIAL REASONS TO ACCOUNT FOR THE UNDERPERFORMANCE OF AN OPERATIONAL WIND FARM
Magister-uppsats, Uppsala universitet/Institutionen för geovetenskaperSammanfattning : Wind farms are costly projects and prior to the construction, comprehensive wind resource assessment processes are carried out in order to predict the future energy yield with a reliable accuracy. These estimations are made to constitute a basis for the financial assessment of the project. LÄS MER
2. NAO Index: An Extreme Pressure Approach
Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapsläraSammanfattning : The North Atlantic Oscillation (NAO) is the major mode of atmospheric winter variability over the North Atlantic. Its current state has long been described by the station‐based NAO Index. This index has been shown to represent winter temperature anomalies over Northern Europe well. LÄS MER
3. Meteorological Investigation of Preconditions for Extreme-Scale Wind Turbines in Scandinavia
Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapsläraSammanfattning : During the last three decades, the hub height of wind turbines has increased from 24 to 162 meters and with an increasing demand for break-through innovations in green energy production it seems likely that this trend will continue. The meteorological preconditions for extreme-scale wind turbines are investigated for Scandinavia using 33 years of reanalysis data from MERRA (Modern-Era Retrospective Analysis for Research and Applications). LÄS MER
4. Uncertainty Analysis of Long Term Correction Methods for Annual Average Winds
Master-uppsats, Institutionen för fysikSammanfattning : For the construction of a wind farm, one needs to assess the wind resources of the considered site location. Using reference time series from numerical weather prediction models, global assimilation databases or observations close to the area considered, the on-site measured wind speeds and wind directions are corrected in order to represent the actual long-term wind conditions. LÄS MER
5. Wind Turbine Production losses in Cold Climate : case study of ten wind farms in Sweden
Magister-uppsats, Institutionen för kultur, energi och miljöSammanfattning : As wind power expands rapidly worldwide, it is becoming more common to build wind farms in alpine locations where the wind resources often are good and conflicting interests are few. This is evident in Sweden where a substantial portion of the large wind parks planned are to be built in cold climate locations. LÄS MER