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TonyC

Building Envelope Boundaries. Air-conditioned and NON-air-conditioned boundary areas

TonyC 2021-06-11 14:45:46


Here's another really interesting support case I'd like to share with our users

Question
What is the purpose of defining air-conditioned and NON-air-conditioned boundary environments?

Answer
By defining the air-conditioned and NON-air-conditioned boundary environments it is possible to simulate the boundary of the enclosures with environments that haven't been modelled.

The air-conditioned and NON-air-conditioned boundary areas must be defined in the "BEM and Zones" section in "Building Data".
Click here to see where to define the air-conditioned and NON-air-conditioned boundary environments

For a boundary area (air-conditioned or NOT air-conditioned) it is also possible to exclude the heat exchange with this environment (adiabatic envelope) from the calculation.
Click here to see how!

Or, in the calculation, consider the heat exchange with this environment by defining the average monthly temperatures and the internal heat transfers of opaque surfaces.
Click here to see how!

Selecting the objects "vertical envelope" and "horizontal envelope" it is necessary to indicate, the boundary conditions in the properties toolbox
Click here to see where to assign boundary conditions to an envelope

The default condition "Calculated environment", specifies that the envelope boundary is acquired directly from the model (for example room or external environment).
Click here to see how to set "Calculated environment"

Alternatively, setting the boundary with "The air-conditioned or NOT air-conditioned environment" it is possible to simulate the boundary of the envelope with environments NOT present in the model.
Click here to see how to set "Air-conditioned and NOT air-conditioned boundary environment"

If the envelope is in contact with the ground, and object "ground contact" has NOT been used, this condition must always be set in the boundary conditions of the envelope.
On the other hand, in the presence of the "ground contact" object applied to the envelope, the boundary is acquired directly from the model (default option "Calculated environment").
Click here to see how to set the land boundary
For more information on the land boundary continue to the following discussion:
forum.accasoftware.com/en/termus-plus/id103968/how-to-define-the-boundary-with-the-terrain.html