A Contribution to Understanding the Mass and Heat Transfer Through the Building Envelope Components

摘要

For decades, building simulation has been used for prediction, design and analysis of new and existing buildings. Two types of computer simulation are often distinguished: global and local, for reducing the cost of energy in buildings.;Global simulation, usually used by the building energy simulation programs, based on conservation equations at the level both outside and inside surfaces, indoor air. These models usually focus on a specific aspect of the building, using all building and systems information and characteristics. The local simulation programs focus on local part of the building, such as walls, floor, or attic, for detailed prediction of the component behavior: temperature and heat flux distributions within the system.;In our work, the local models have been used. Two aspects have been considered: moisture storage in building wall components and heat transfer through the building envelope, based on numerical methods, heat and mass transfer equations. These models are based on heat transfer phenomena: conduction, convection, radiation and phase change materials.;Our objective is to identify the behavior of different assemblies in term of mass and heat transfer under different weather conditions (or under different boundary conditions).