Abstract :
This paper is based on the study of an experimental wooden-framed house, equipped with a ventilated cladding, located in France.
The focus is on investigating the heat transfer taking place in the ventilated air gap behind the cladding and on estimating their impact on
heat transfer in the insulated part of the walls.
Preliminary CFD simulation made it possible to describe the airflow in the ventilated air gap when buoyancy was acting as the main
driving force. It was found that the airflow velocity could reach 0.8 m s 1, when exposed to 570 W m 2 solar irradiance. This was verified
experimentally. A correlation to assess airflow rate in the air gap behind the cladding has been developed based on temperature differences
and on experimental conclusions. The correlation is adapted to energy performance simulation and efficiently represents the average
cavity airflow at different height for various irradiance and temperature conditions.
2012 Elsevier Ltd. All rights reserved.
