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to first-class-cup-anemometry. In daily practice the advantage of RSDs is their mobility. European wind resource specialists, like the international engineering consultant BBB Umwelttechnik install their LiDAR units in compact trailers which are equipped with PV and fuel cells that allow operation even in the remotest areas. Raising the p-value pays off Another highly important advantage of using LiDAR technology, especially in combination with cup anemometry Wind Edition is that it can significantly raise the p-value. In energy yield assessments the p-value describes the probability of matching or exceeding the calculated energy yields. A p-50 value describes a probability of 50 percent that the hypothesis is true. For financial transactions the p-90 value is the most important reference. This value is strongly influenced by uncertainties: the higher the uncertainties, the lower the p-90 value. In the graph (see graphic) the influence of an additional LiDAR measurement alongside a met mast measurement on the p-90 value is particularly noticeable. With the met mast alone it lies at 56.4 GWh/a, while a combined measurement raises it to 60.7 GWh/a. In this exemplary calculation the difference amounts to 7.7 percent increase of the yield figure. Economically this correlates with an increase of project IRR of approximately 5 %. So whether the ultimate goal is to find the ideal project layout or to optimize your project for a finan- 140 Mast 140 m Mast + 3x3 LiDAR Comparison of yield estimations based on measurements with or without the use of additional LiDAR technology Source: BBB Umwelttechnik cial transaction – high quality wind measurements are potentially the most valuable milestone on the path to success. www.husumwind.com MESSE HUSUM & CONGRESS Book your stand now! in co-operation with Partners of HUSUM Wind 2015 See you at HUSUM Wind! 15 –18 September 2015 in Husum, Germany The perfect place to do business Markus Rieger Markus Rieger is Manager Marketing & Sales at BBB Umwelttechnik GmbH, www.bbb-umwelt.com AEP, p50 = 75 GWh a-1 p90 (Mast) = 56.4 GWh a-1 p90 (Mast+LiDAR) = 60.7 GWh a-1 140 m Mast 140 m Mast + 3x3 LiDAR AEP, p50 = 75 GWh a-1 p90 (Mast) = 56.4 GWh a-1 p90 (Mast+LiDAR) = 60.7 GWh a-1 Probability Density Forcasted average annual return in GWh a-1


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