Vindkraftsetablering i skog
This thesis assignment at C-level is focused on calculation models and prediction methodswhish can be used in the stage we call ?prospecting? of possible windmill locations. Thelocation is southeast of Halmstad at the Farm ?Stjernarpsgods?. The rapport has two mainareas directed towards this task. The areas are a study of literature and a description ofmethods used in the project. The ?prospect? project description is aimed towards calculationsof the energy carried by the wind and transformed to electricity by windmills.With a relatively simple algorithm of mean wind speed data from the MIUU - model, Cp androtor area from a turbine with 90 m diameter, the calculated production is 6 638 MWh. Whenthe same mean wind speed is used in the second type of calculation, Weibull distribution(with a calculated A and the form value c set to 2) and the power curve for Vestas V90 takenfrom WindPro, the production was 6 873 MWh. The third alternative uses collected data froma local mast at a distance of 18km´s from the site. This data is normalized and used tocalculate with Weibull distribution the production to 7 443 MWh. Finally a referencecalculation is done using WindPro and the official SMHI wind data from Halmstad andRinghals. In this case the production was calculated to 5 725 MWh. The difference is a 30procent increase from the lowest to the highest production value. Comparing calculations atdifferent heights shows that the difference in result is very small at a height of 50 meters, butincrease with increasing height.The Pay-off time was calculated with 3 different energy prediction models. The result wasPay-off times off 7, 5 ? 9 ? 11, 4 years, with the price of electricity at 0, 60 Sek/kWh.The environmental consequence analysis which is presented in appendix 1 is mainly focusedon landscape impact, whish in this case means, that the windmills are clearly visible fromwest and southwest.The conclusion is that the value of wind measurements and understanding of sources of erroris important, and that no investment should be done without proper wind measurements onsite.