When creating a new Rhinoceros model for Umi, always use Meters as the unit system.
Choose Meters as the default unit in Umi.
After pressing the 'Location' button, a series of layers is created by Umi which all thermal geometry must be modeled upon.
The available Umi-Thermal layers.
- Buildings, all building polysurface representations that will be simulated are located on this layer.
- Windows, window planes coincident with building surfaces are modeled on this layer.
- Floor-Levels contains automatically-generated polylines to indicate floor height levels of each building.
- Labels / Results is a layer for displaying results that is safe to ignore.
- Shading (non-thermal)
- Ubiquitous Shading (Tall Buildings) is for modeling objects that will shade every building in your simulation file, such as very tall buildings.
- Contextual Shading (Buildings) is for modeling smaller buildings whose energy will not be simulated but can cast shadows onto simulated buildings. Each building on the Buildings layer will test within the user-set shading radius for whether these buildings should be included in the shading calculation.
- Local Shading (Louvers) is used for modeling planar shading surfaces which are attached to a specific building. These surfaces are often automatically generated when creating windows and fixed shading devices, but can be modeled manually and must be coincident with a building polysurface object.
- Trees is for modeling deciduous trees as polysurfaces. During the sinter, objects on this layer transmit 30% of light, and otherwise they transmit 60% of light. Any month during which the average outside dry bulb temperature is below 8.0 C is considered a winter month.
- Photovoltaic Systems is used to model photovoltaic panels as planes. Like the Local Shading (Louvers) layer, the planes must be coincident with a building polysurface object.
Building polysurfaces in Umi must be modeled as orthogonal extrusions.
An example of a correctly and incorrectly modeled polysurface pair in Umi.
Buildings must have a continuous outside edge; therefore a courtyard building must be modeled in two halves. The adjoining walls will be adiabatic.
A courtyard building in Umi must be modeled as two halves.
All shared walls, ceilings or floors in Umi will be considered adiabatic.
Example stacked courtyard buildings with adiabatic surfaces identified.
Photovoltaic and Local Shading Geometry
Photovoltaic panels and local shading geometry must be modeled as planes with an edge coincident to the building polysurface.
An example of correctly modeled photovoltaic panels and louvers.
Next: Assigning Building Information