Download OPENWIND® USER MANUAL - AWS Software


Blade Degradation Loss. This can be used to specify a spatially varying energy loss due to blade
degradation.
Site Access Loss. This can be used to specify a spatially varying energy loss due to problems
accessing the site for maintenance.
Icing Loss. This can be used to specify a spatially varying energy loss due to icing.
Temp Loss. This can be used to specify a spatially varying energy loss due to high or low
temperature shutdown. This loss will get overridden when using the time series energy capture
with the option to include effects of time-varying temperature.
Other Energy Loss. This is a catch-all used by the Energy Capture routine that allows the input of
a spatially varying predetermined energy loss not listed above.
Uncertainty - this can be used as part of an uncertainty function. When an uncertainty blended
adjustment of a WRG is carried out, a blended uncertainty raster is created and it has to have
this interpretation.
Cost Multiplier - this is used in the cost of energy module (Section 37 below).






Although it might seem fairly obvious that a just-loaded raster is a terrain elevation layer, Openwind
needs to be told how to interpret this information. Until a physical interpretation has been set in the
Interpretation tab, Openwind sees only a grid of values with no particular meaning and will treat it as a
display layer. When one of the models in Openwind does not behave as expected, users will want to
check this tab along with the position of the layer in its hierarchy.
The Interpretation tab shown in Figure 16.2 is common to the LineLayers and PolygonLayers, although the
list of physical interpretations is tailored to each.
Figure 16.2 - Layer Properties: Interpretation (LineLayer)
Openwind includes the ability to interpret qualitatively for features such as water courses where a value
may not be sensible but where certain models still benefit from being informed of their location. An
example of this would be a road generation algorithm that uses location of a water course to re-route a
section of access road or to increase the cost of that section.
52
OPENWIND USER MANUAL