SYMPOSIA PAPER Published: 01 January 1990

Influence of Natural Convection in an Insulated Cavity on the Thermal Performance of a Wall


The influence of the airtightness of the insulation layer in a partially filled cavity construction is discussed. In theory it is assumed that the insulation forms a continuous layer that is perfectly fixed against the inner wall of the cavity, leaving an air space between the outer wall and the insulation. However, in practice we frequently notice the presence of air gaps in the insulation layer, and of a second small cavity between the insulation and the inner wall. The influence of these inaccuracies on the heat transfer is studied by means of experimental research and computer simulations.

This paper presents the results of extensive measurements on a partially filled cavity wall (temperature profiles, heat loss), using a calibrated Hot Box-Cold Box. These results are compared with calculations of the temperature profiles and the overall heat transfer. A second series of measurements deals with the influence of the slope of the cavity.

Author Information

Lecompte, JGN
Laboratory of Building Physics, Katholieke Universiteit Leuven, Heverlee, Belgium
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Developed by Committee: C16
Pages: 397–420
DOI: 10.1520/STP23320S
ISBN-EB: 978-0-8031-5109-3
ISBN-13: 978-0-8031-1278-0