Why you should model and calculate in 3D - a publication by Dr. Pont:
The consideration of thermal bridges in building envelopes gained
importance in recent years. This is due to their potential impact on the
overall thermal building performance of highly-insulated buildings.
Moreover, energy-efficient buildings tend to be more sensitive to
problems associated with thermal bridges, such as surface condensation,
mould growth, and thermal comfort issues. Therefore, planners must
minimize the negative impact of thermal bridges. Although user-friendly
thermal bridge simulation tools are available, they are not yet widely
used in practice. Instead, planners often rely on generic details from
the building construction literature. The thermal performance of such
details often remains unknown, given the wide range of possible building
materials (and their thermal properties). In this contribution, we
present the results of a thermal bridge simulation of a set of such
standard details. Thereby, we assessed vertical sections through typical
constructions via 2D thermal bridge simulation, as well as 3D corner
situations constituted by such 2D sections. This was done to address two
research questions: i. How do typical details perform, given the large
range of thermal properties of applied materials? ii. How does the
performance of the 3D-thermal bridges compare to their constituent
2D-details, and is it possible to use 2D results to approximate the
results of 3D thermal bridges?
Link to the publication: http://www.antherm.at/antherm/C75_postreview.pdf
Monday 16 October 2017
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