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WAsP – the Wind Atlas Analysis and Application Program |
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WAsP – the Wind Atlas Analysis and Application Program |
This list of known issues relates to the newest versions of the WAsP programs only. You may also check the FAQ's for more information on program specifications and limitations. For a list of known issues related to version 7.3 of WAsP click here.
Description: Dongle may not be recognized.
Issue #794
Users affected: Users with Windows XP operating system.
Details: WAsP may have been correctly installed without the dongle
attached, and afterwards the Licence Manager is invoked with the dongle
attached. Nevertheless, the following error is experienced by some users: The dongle is not detected by the Licence Manager, and
in the page "Get the ID code" the dongle field says "No dongle is attached".
Hence the licence unlock-code associated with the dongle cannot be installed.
Workaround: The HASP dongle driver may have to be updated manually.
Contact waspsupport@risoe.dk to get a
Dongle Driver updating kit to install and run.
Fixes: This bug will be fixed in one of the near-future WAsP versions.
Description: An error message that vb.usercontrol is
not set up right is issued.
Users affected: Users who have upgraded to 8.3.0037
directly from a very old version 8.
Details: When you try to launch a window, or a script,
with a climate rose or graph, you get some kind of complaining message about
vb.usercontrol not being set up right.
Workaround: Delete manually the file "Rvea0042.ocx" in the
"....\Program files \WAsP\Bin" folder. (The folder name may be different
depending on a national WINDOWS version). Then next time WasP is started it will
update this file to a new version where the error has been fixed.
Fixes: In the latest WAsP 8.3.0037 installation package (released
25.06.2007) the problem has been solved.
Description: Non-standard air densities cannot be
treated explicitly. Issue #420
Users affected: All.
Details: No possibility to specify the air density for a single turbine or for a wind farm.
Workaround: Obtain from the wind turbine manufacturer a power curve
which is optimized for the actual average site air density, and use that instead of the standard density power curve.
Fixes: Wind turbine power curves containing multiple air density information will be introduced in a
future version.
Description: Low land roughness and water roughness confusion. Issue
#885.
Users affected: All.
Details: Non-zero roughness lengths below or equal to 0.0005 may be interpreted by
WAsP as water.
Workaround: Never use land rougnesses below or equal to 0.0005 m in a map. Doing so
may cause the roughness rose calculation to confuse land with water. This can be
revealed by inspecting the roughness rose looking for roughness lengths of zero.
For water areas there is no change: you should always set the roughness value to
0 (zero) in WAsP.
Fixes: This issue will be fixed in a future version.
Description: Misleading labeling of distribution functions for power
density, AEP and probability of occurrence. Issue #1852.
Users affected: All.
Details: In the windows for wind turbines, the pages “Power” and “Wind”
include graphs of the distribution functions (functions of wind speed) for power
density (PD), AEP and probability of occurrence (f). Whereas the units for
these properties themselves are quite straight-forward (column 2 in the table
below), the corresponding distribution functions have – strictly speaking – different units as they express the contribution to the property in question per
unit wind speed (column 3 in the table):
Property
Unit
Basic
Distribution function
Power Density (PD)
[W/m2]
[(W/m2)/(m/s)]
AEP
[MWh]
[MWh/(m/s)]
Probability of occurrence (PO)
[%]
[%/(m/s)]
However, at the ordinate of the graphs, the distribution
functions are designated with the unit of the basic property only – not with
that of the distribution function. Admittedly, this may be misleading in some
cases.
The same misleading labeling is seen in the distribution function graphs for
Observed Wind Climates (OWC) and Regional Wind Climates (RWC or ‘Wind Atlas’).
Correspondingly, in the single-wind-turbine report the Power Density
distribution function, at the wind speed where this distribution function takes
its maximum, is given with a misleading unit: [W/m2], where the
correct unit should have been [(W/m2)/(m/s)].
Workaround: For all distribution function graphs – for power density
(PD), AEP and probability of occurrence (f) – it should be implied that the
stated unit of the function should be extended like <Basic unit>
Fixes: The single-turbine-site report script will be corrected. The
entire problem will be explained in a forthcoming version of the HELP file.
Description: Break-down of lengthy digitization operations. Issue #423.
Users affected: All.
Details: When performing lengthy on-screen digitizations of height contours/roughness lines on top of a background bit-mapped map image, the process may sometimes lock up, leaving the map display window empty, and also sometimes affecting the functioning of the operating system. The cause seems to be limited assigned graphical memory in the
Windows operating system.
Workaround: The problem may be avoided by – at suitably regular intervals – saving the map digitized so far, followed by closing down and restarting the map editor, and then continuing the digitization
process.
Fixes: Will be fixed in later version of the map editor by using an alternative graphical drawing technique.
