262 uppsatser · sida 8 av 18
… that are profitable, that the repayment time isn’t too long. Solar cells and wind turbines are examined as well, but the repayment time for solar cells are too long at the moment. The repayment time for solar cells varies between 42 - 75 years, while the expected lifetime is 25 …
case study of Tönsen wind power park project
… was mostly used. The chosen framework was applied to a case study of the wind power project in Tönsen. Methods for the study include a literature review and surveys. The results include suggestions on how to better design a detailed framework for analysis. It was found that …
… they affect the stand on behalf of future growth, theoretical economic result, wind impact, snow pressure and density of stand. The investigation is regarding the first commercial thinning of pine stands, after pre-commercial thinning that was well conducted. The investigation …
Construction of an autonomous wind station was a project with the goal of creating a product that could collect wind data from a sensor and then transfer this data to a server wirelessly over the GSM network. The device would be powered by batteries and solar cells and function …
… friction velocities above 0.4 m/s. There appeared four distinctly different wind direction sectors that showed significantly different respiration levels. These sectors were weakly correlated to differences in stand properties. A PLS-model for the carbon flux was created with …
en studie i norra Island
… of papers and books. Correlations were made comparing tetratherm against the wind speed, height above sea level and distance to the sea. The parameters explained 74 % of the variation of the tetratherm. Therefore would it be interesting to further develop the tetratherm model by …
en ekonomisk analys
… of the problem. A lot of forest owners got large areas of spruce stands wind thrown during this storm. Can naturally regenerated birch (Betula sp.) be an alternative on these wind-exposed sites? This was the main question I was facing when discussilig the problems with Esben …
… robots and the two automatic feeder together with the space boarding at strong wind. Brandstadholm on the other hand is very quiet. The wall hatch on the north side are the primarily air inlets together with the ridge in the west at Bollerup. The measures at Brandstadholm shows …
… climate parameters (air temperature, globe temperature, relative humidity, wind angle and wind speed and solar radiation) were recorded in a weather-station. Inside the barn air temperature and relative humidity were recorded. The study also collected parameters reflecting the …
jämförelse mellan naturlig och mekanisk ventilation
… is based on the temperature difference between the external and internal air, wind speed and, most crucially, the speed of the vehicle itself. It thus varies considerably. Mechanical fans can be mounted inside to provide a more even ventilation effect and to guarantee that the …
… of this work was to study if the edge of the forest is more resistant to heavy winds than the trees located further in from the edge, and how this edge effect changes between different types of tree species and site types. The data was collected from an electric power line going …
… of these commodities are pure bio electricity, pure hydro electricity, pure wind electricity and gray electricity. Gray electricity is an unspecified mix of different power sources where origin does not matter. The aim of this thesis was to create models which can be used to …
The aim of this master thesis was to find and grade suitable sites for wind turbines in the rural district of Lerum at the reguest of Göteborg Energi. The rural district of Lerum consists of very complicated terrain which was the reason why we picked Lerum. The assignment was …
… between amateurs and professionals and how to pick music in an amateur wind band. In the result chapter I account for the inquiry and the interviews. The results show that the orchestra grew with this task, but also that it demanded more of the individual musician than some of …
Micro-power wind energy convertors have recently increased in popularity. The reasons for this are among other things the increasing cost of electric energy and enviromental concern. In this thesis the connection of these micro-power wind energy convertors to the utility network …
