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Brian Ohrbeck Hansen

WAsP team
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  1. Hi Pedro, Please have a look in the WAsP Map Editor's help file regarding "Digital Map Databases" and "Database-Map-Importer". Best regards, Brian
  2. Dear ysga, Horizontal axis wind turbines do of course also "accept" wind from all directions (because they are able to yaw/turn). That aside, the starting point of the WASP analysis is a high-quality wind data set. Wind data should preferably be available as time-series of wind speed and wind direction. The time-series data to be used in a wind climate analysis, should come with some additional information:
- name of data file(s)
- data period
- data format
- observation interval
- averaging period
- calm thresholds (for speed and direction, resp.)
- data discretisation (resolution)
- flag
  3. Hi Rachel, The capacity factor of a wind farm is the annual energy production (AEP) divided by the theoretical maximum AEP. Capacity factor = AEP / (rated power * 8760 hours per year) See also: http://drømstørre.dk/wp-content/wind/miller/windpower%20web/en/tour/wres/annu.htm#capfac Best regards, Brian
  4. Hi Carriv9, WAsP is for the vertical and horizontal extrapolation of wind climate statistics. Based on an observed wind climate statistics, WAsP calculates a generalized wind climate and, in turn, WAsP calculates a predicted wind climate statistics and AEP (annual energy production). It is our recommendation that your selection of wind data should cover a sufficient time period. At least one year, but preferably several (whole) years. Cheers,
  5. Hi vob, Can you please send this message to "waspsupport@dtu.dk" and include your WAsP workspace? Thanks, Brian
  6. Hi Gyeongil, Regarding your question 2, we decided to increase the generalized wind climate default height range because we had on more occasions been contacted by WAsP users who needed to make calculations beyond the old height range. So this does not mean that we have made changes or improvements targeted at "tall profiles" yet. Best regards, Brian
  7. WAsP 11.4 Release D WAsP version 11.4.0016 has been released. It restores display ability in Google Earth.
  8. Please update your WAsP Engineering and re-create recent projects There is a problem with the water roughness calculations in WAsP Engineering 3.1 which means that fetch calculations will not be properly invoked. We recommend that you install the latest release of WAsP Engineering (3.1 release ‘E’) and recreate any projects which have been created with WEng 3.1. What is the scope of the problem? This only applies to projects created with WEng 3.1 from vector maps (using the built-in gridding converter), or projects created from grid maps which were created using the updated GridMaker utility
  9. The Windfarm Assessment Tool (WAT) is a post-processor of results from WAsP and WAsP Engineering, supporting the site assessments of various IEC standards. The new release contains several new features. The Windfarm Assessment Tool (WAT) is for wind energy engineers: • Include effects of wind sector management, technical losses and uncertainty in windfarm production estimates • Check site suitability of a given wind turbine class • Make terrain assessments in preparations for power-performance measurements The main feature of WAT is still the IEC 61400-1 site assessment based on combined
  10. Hi vman, In order to be able to calculate a wind farm power curve (power output of the wind farm as a function of wind speed and wind direction at a common reference position), it is necessary to refer the wind speed and wind direction to a common reference position; the reference site. Please refer to the WAsP help file for further information about reference sites. Cheers, Brian
  11. Hi Jan, Here's a WAsP turbulence intensity example - simulating the Bolund case: In the wake of Bolund: - The speed-up factor from the WAsP CFD result file, A = U/Uref = 0,3066 - The turbulence from the WAsP CFD result file is K = sqrt(TKE)/Uref = 0,1658. Uref is the wind speed at the inlet of the computational domain. WAsP will give the turbulence intensity as 0,1658/0,3066 = 0,54 = 54 % WAsP will truncate the turbulence intensity at 100 % The speed-up factor and the turbulence from the WAsP CFD result file are both wind speed independent (WAsP CFD calculations are Reynolds number indep
  12. WAsP 11.1 includes a couple of quite extraordinary new features for siting of wind turbines, wind farms and met stations. WAsP CFD result files now include turbulence data and with WAsP 11.1 it is now possible to show WAsP CFD turbulence intensity and flow inclination in WAsP resource grids. In WAsP 11.1 these same properties are now also included in the ”Site effects” tab for turbine sites, reference sites and met stations. New features: •Integration of turbulence and flow inclination from WAsP CFD results files •Site effects tab now separates IBZ and CFD information (relevant reports too)
  13. A new version of the WAsP Map Editor version 11.3 is available from http://www.wasp.dk/ It has the following new features: - SRTM Map importer implemented - Projection database reading (Asian Windows versions) error fixed - Shape file reading errors fixed - Shape-file elevation from associated dBase file now supported - DXF-map reading bug re. files with unspecified DXF-format version now fixed
  14. The WAsP Team is happy to announce that WAsP 11 is released on 29 April 2013. WAsP 11* is the latest version of the Wind Atlas Analysis and Application Program, which now includes a fundamentally new approach to Computational Fluid Dynamics (CFD) for wind resource assessment in complex terrain**. We call this new feature WAsP CFD and it combines WAsP with the CFD solver EllipSys in the elegant WAsP graphical user interface that you already know. The design philosophy of WAsP CFD has been a joint model approach; you set up the WAsP project and can subsequently opt for a CFD solution if the si
  15. With the release of WEng 3 last December, we will no longer be supporting WAsP Engineering 2 and we therefore recommend all WEng 2 users to upgrade their licences. If we receive the upgrade order in 2012, we will offer a 10% discount.
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