BOUNDARY
This tab lets you specify which lines of the frame are in contact with internal and external environments. By selecting one of the available boundary conditions you'll be able to set the following parameters:
Name: name of the boundary condition;
Air temperature: temperature of the environment's air; please note that you have to use default temperatures to perform a simulation respecting the standards;
Resistance: surface resistance;
Humidity: environment's humidity;
Color: boundary condition's color.
These are the commands:
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Assign selected boundary condition to a single line. |
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Assign selected boundary condition to every line having the same boundary condition of the line you're going to click. |
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Remove all the assigned boundary conditions from the project. |
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Select boundary condition by clicking on a line. |
U-factor surface
Each boundary condition has the ability to affect U-factors calculation (refer to U-factors documentation for more information). Leaving this setting to the default value ("use segment settings"), the U-factors calculation is not altered, but if you select a U-factor, all the segments to which is assigned the current boundary condition will be used for the calculation of that factor. By selecting "Create New", a new U-factor surface will be created with the same name of the current boundary condition.
Increased resistance algorithm
EN 10077-2 states that in some cases increased surface resistance has to be used on internal borders; by default this software identifies these lines automatically. You can disable this algorithm by unchecking "Active" box. "Tolerance" parameter allows you to control the algorithm's sensitivity: the higher the value, the more likely is increased resistances detection.