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Humidity of indoor air is an important factor influencing the air quality and energy con- sumption of buildings as well as durability of building components. Indoor humidity depends on several factors, such as moisture sources, air change, sorption in materials and possible condensation. Since all these phenomena are strongly dependent on each other, numerical predictions of indoor humidity need to be integrated into combined heat and airflow simulation tools. The purpose of a recent international collaborative project, IEA ECBCS Annex 41, has been to advance development in modelling the integral heat, air and moisture transfer processes that take place in "whole buildings" by considering all relevant parts of its constituents. It is believed that full understanding of these processes for the whole building is absolutely crucial for future energy optimization of buildings, as this cannot take place without a coherent and complete description of all hygrothermal processes. This paper will illustrate some of the modelling work that has taken place within the project and present some of the simulation tools used.


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Tools for Performance Simulation of Heat, Air and Moisture Conditions of Whole Buildings

Show Author's information Monika Woloszyn1Carsten Rode2( )
Université de Lyon, Lyon, F-69003, France; Université Lyon1, Villeurbanne, F-69622; INSA-Lyon, CNRS, UMR5008, CETHIL, INSA-Lyon, bat. Sadi Carnot, 69621 Villeurbanne CEDEX, France
Technical University of Denmark, Brovej, Bygning 118, DTU, DK-2800 Kgs. Lyngby, Denmark

Abstract

Humidity of indoor air is an important factor influencing the air quality and energy con- sumption of buildings as well as durability of building components. Indoor humidity depends on several factors, such as moisture sources, air change, sorption in materials and possible condensation. Since all these phenomena are strongly dependent on each other, numerical predictions of indoor humidity need to be integrated into combined heat and airflow simulation tools. The purpose of a recent international collaborative project, IEA ECBCS Annex 41, has been to advance development in modelling the integral heat, air and moisture transfer processes that take place in "whole buildings" by considering all relevant parts of its constituents. It is believed that full understanding of these processes for the whole building is absolutely crucial for future energy optimization of buildings, as this cannot take place without a coherent and complete description of all hygrothermal processes. This paper will illustrate some of the modelling work that has taken place within the project and present some of the simulation tools used.

Keywords: modelling, heat, air, moisture, whole building

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DOI
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Publication history

Received: 21 November 2007
Revised: 18 January 2008
Accepted: 28 January 2008
Published: 01 March 2008
Issue date: March 2008

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© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2008

Acknowledgements

IEA Annex 41 had participation of researchers from 39 institutions representing 19 different countries. The col- laboration with and contributions from all colleagues is greatly acknowledged.

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© Tsinghua Press and Springer-Verlag 2008

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