Description: Objects		Version: 4.9.0		Updated: 10.03.09

Objects

Placing the objects

The Objects module is used to position turbines, climatologies and transferred climatologies. For visualisation purposes various geometrical objects can also be placed within the 3D terrain model.

Alternatively objects can be read from a .ows files using the Tools->Import objects menu item, see example of the .ows format.

Climatology conversion

If the climatology data is not given on the WindSim format .wws, a conversion is necessary before the data can be used within WindSim.

Conversion from other formats is performed by clicking the Tools->Convert climatology data menu item. The Convert climatology data is subject to continuous development, so please contact WindSim AS if you need extensions in order to perform the conversion of your specific data, see examples of supported climatology formats: third party formats. Alternatively, you can convert your climatology data directly to the .wws format by using your own tools, see: climatology data.

	Properties
	1. Object definition
	Object type
	Setting the object type as Turbine, Climatology, Geometrical or TransferredClimatology. Default value is Turbine (-).
	Name
	Name of the object.
	Visible
	Setting the object as visible or invisible for visualisation purposes. Setting visible, False for a Turbine object will cause it to be disregarded in the energy calculation. Setting visible , False for a Climatology object will cause it to be disregarded in the wind resource and energy calculation.
	Visualisation file
	Specification of a file with geometry used for visualisation. For Turbine objects it is recommended to use turbin_nn (nn is a height), which automatically generates simple scaleable geometries in accordance with the legend in the report section. Likewise for climatology and climatology transfer objects it is recommended to use climatology_nn (nn is a height). Default value depends on Object type (-).
	Climatology file
	Specification of a climatology file. Climatologies can be converted from other formats by clicking the Tools->Convert climatology data menu item.
	If the object type is TransferredClimatology then the specification of an existing climatology file used within the project will be transferred to a new position. Any x and y coordinates within the model is allowed, but there is a restriction on the z values. The z values must be above the first computational node, which varies according to the resolution in the given mode. A warning is given if a value below the allowed minimum is given. The height of the reduced wind database, specified under the Wind Fields module defines the maximum z value. The transferred climatology will be placed in the climatology folder with the prefix trans_ added to the original file name.
	Transfer climatology is useful for cross checking and for successive transfer of climatologies over larger distances. By transferring a climatology to higher altitudes in a refined model, small scale effects are filtered out. Now the transferred climatology can be used in a coarser model for transfer over larger distances. Finally the climatology can be imported again in new refined models.
	Note that transferred climatology objects within a model are not used in the Wind Resources and Energy modules, as they don't provide any new information. A climatology transferred from an external model will provide new information, these climatologies can be included as ordinary climatology objects. Default value is none (-).
	Power curve file
	Specification of a power curve file. If a turbine type is not available you can create it in a text editor. Default value is none (-).
	Hub height
	Turbine hub height. Default value is 80 (meters).
	Rotor diameter
	Turbine rotor diameter. Default value is 60 (meters).
	Rotation speed
	The rotational speed of the turbine blades or the climatology anemometer. Default value is 10 (rounds per minute) for turbines and 25 (rounds per minute) for climatologies.
	Facing wind direction
	The direction towards which a turbine is turned. The angle is in degrees measured clockwise from North. The default value is 180 (degrees), meaning that the turbine is oriented towards South.
	2. Position
	Coordinate system
	Positioning of objects is by reference to a local or global coordinate system. The local coordinate system has its origin in the lower left-hand corner of the 3D terrain model. The global system is the system specified in the grid.gws file. Default value is Local (-).
	X and Y position
	The X and Y position of the objects according to specified coordinate system. For Climatology objects the position cannot be changed, because it is specified in the .wws file. The .wws file can be opened in a text editor by clicking the Tools->View climatology data (.wws) menu item.