Issuu on Google+

New features in Meteodyn WT 4.5 March 2013


Release information • • • • •

New input formats for topography data Improvement of the input data process New overlapping tool New smoothing tool Improvement in the Statistical graphics tools


Release information • • • • •

New input formats for topography data Improvement of the input data process New overlapping tool New smoothing tool Improvement in the Statistical graphics tools


New formats • New input formats for topography data – Shape file for topography (orography and roughness) – Color Tiff file for roughness Available formats in Meteodyn WT Orography: map, xyz, dxf, shp Roughness: map, xyz, chm, shp, tiff/tif Topography: map Pre loaded database available for roughness value(Corine Land Cover for Europe, NLCD for US, …)


SHAPE in practice A *.shp file is a vector data format describing geometries like points, polylines or polygones which contain different types of information. Mandatory files related to shape file: - SHP: shape format ďƒ  geometry - SHX: shape index format –> a positional index of the feature geometry to allow seeking forwards and backwards quickly. - DBF: attribute format When using a shp file it is necessary to have the .DBF and .SHX files associated with your shape file in the same folder.


SHAPE in practice Orography The user is able to specify a new attribute for elevation data


SHAPE in practice Roughness


SHAPE in practice Roughness

Roughness length code available database CLC

Corine Land Cover Europe

100m resolution

LULC

Croatia, Bosnia, Macedonia, Serbia

5m resolution

NLCD

National Land Cover Database ďƒ  US and Puerto Rico

30m resolution


TIFF in practice TIFF COLOR Not TIFF index (in progress)

Automatically deduced from the file Available database : CLC, NLCD, UCL + User database


TIFF in practice In case of user database: Roughness length


New formats: in practice In progress: Global roughness database with a resolution of around 300 meters Generated by ESA(European Spatial Agency)


Release information • • • • •

New input formats for topography data Improvement of the input data process New overlapping tool New smoothing tool Improvement in the Statistical graphics tools


Input data process Roughness and elevation data process is now optimized  “save and check” faster “Display”  faster view of the site Mesh and global computation faster Time reduced by a factor of 3 to 5 thanks to improvements and optimization in the code of the software


Input data process Example for 5 sites Site Name

Characteristics

Radius (m)

Site 1

Semi complex and forested terrain

4,000

Site 2

Complex and forested terrain

6,000

Site 3

Coastal area

9,500

Site 4

Complex and forested area

5,000

Site 5

Coastal area

15,000


Release information • • • • •

New input formats for topography data Improvement of the input data process New overlapping tool New smoothing tool Improvement in the Statistical graphics tools


Overlapping tool Before: it was possible to overlap several files but was not adapted to customers’ problematic The idea is to have the possibility to define two neighboring forested zones with different densities

Overlapping parameters: By default, grid resolution = 25 m What kind of files can be overlapped? Only files that have the same format (extension) For orography: No process on data files A large file is created: merge of the different orographic files For roughness: Hierarchy in the files in the site windows


Overlapping tool

roughness3.map

roughness11.map

Example of roughness maps – map format


Overlapping tool Example of roughness maps – map format


Overlapping tool

Shp1_3.shp

Shp1_2.shp

Shp1_1.shp

Example of roughness maps – shape format

312 Rugo = 0,7

211 Rugo = 0,06

No information outside the blue lines

324 Rugo = 0,35

No information inside and outside the pink lines


Overlapping tool Example of roughness maps – shape format


Overlapping tool Example of roughness maps – shape format


Release information • • • • •

New input formats for topography data Improvement of the input data process New overlapping tool New smoothing tool Improvement in the Statistical graphics tools


Smoothing tool The smoothing can be activated by the user in case of divergence problem due to hilly areas

In case the user is sure that the divergence comes from sharp elevation data, smoothing is the first thing to try to avoid divergence

Better convergence rate in case of very sharp elevation data


Smoothing tool 1. Smoothing of the 4 boundaries 2. Propagation of the smoothing until the radius is reached 3. At the radius distance, there is no smoothing

Do not use this option for small sites (less than 10 km for radius)


Smoothing tool Results on a complex site more than 900m difference in elevation for a radius domain of 12 km Convergence rate obtained with / without smoothing tool


Release information • • • • •

New input formats for topography data Improvement of the input data process New overlapping tool New smoothing tool Improvement in the Statistical graphics tools


Statistical graphics tools More information on Weibull parameters directly available in this window Useful for customers who work with other software (windpro / windfarmer/ ‌) These software use Weibull parameter for production estimation


Statistical graphics tools Example for a directional display


New features in the version 4.5 of the CFD meteodyn WT dedicated to wind resource assessment