Table of Contents
ISRN Renewable Energy
Volume 2012 (2012), Article ID 573176, 9 pages
http://dx.doi.org/10.5402/2012/573176
Research Article

Natural Convection of a Solar Wall in a Test Room under Tunisian Climate

Laboratoire des Procédés Thermiques, Centre de Recherches et des Technologies de l’Energie, Technopôle de Borj-Cédria, BP 95, 2050 Hammam-Lif, Tunisia

Received 13 April 2012; Accepted 9 May 2012

Academic Editors: E. R. Bandala and B. Mwinyiwiwa

Copyright © 2012 N. Dimassi and L. Dehmani. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Tunisia has a great potential of solar energy, which is the most important source of renewable energy; however, sufficient benefit can be obtained from this clean energy source especially for building heating. This paper reports on an experimental investigation on the natural convection of a Trombe wall in a test room located in Borj Cedria under the Mediterranean climatic conditions of Tunisia. Temperatures were recorded throughout the test room, as were the air velocity and the climatic parameters affecting the Trombe wall operation. This work deals with analyzing the natural convection heat transfer process with the evaluation of Rayleigh number, Nusselt number, the wall convection coefficient, and the convective flux. The results show that many parameters affect the wall function and therefore the thermocirculation process. The flow along the wall was found to be composite and turbulent most of the time.