Computational Prediction Of Hygrothermal
Conditions In Innovated AAC-based
Building Envelopes
Author(s)
J. Maděra, V. Kočí, J. Kočí, J. Výborný & R. Černý
Abstract
Hygrothermal conditions in innovated AAC-based building envelopes are
studied in the paper, using computational analysis with exactly measured hygric
and thermal transport and storage properties as input parameters. The applied
computational model of heat and moisture transport in multi-layered systems of
porous materials is based on the Galerkin finite element approach. The computer
code written in C++ is used in a series of computational simulations. Climatic
data corresponding to the test reference year for Prague are used as boundary
conditions, so that cyclic wetting and drying occurs in the envelope. The results
of computer simulations of moisture and temperature fields are then utilized in
the subsequent service life analysis. On the basis of changes of moisture and
temperature, particularly the number of wetting-drying cycles and frost cycles
the durability of the AAC envelopes is assessed.
Keywords: AAC building envelope, heat and moisture transport, computational
simulation, service life estimation.
1 Introduction
Autoclaved aerated concrete (AAC) is a structural material which is commonly
used around Europe, particularly as it combines ease of construction with
excellent combination of its mechanical and thermal properties. However, the
empirical principles employed in construction design until now have led to
serious failures which may have serious consequences for the future practical
Keywords
AAC building envelope, heat and moisture transport, computational
simulation, service life estimation
Related Book
Other papers in this volume
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