Thermal behaviour of roof-mounted radiant barriers under tropical and humid climactic conditions: ..


Thermal barriers, intended to minimise building temperatures by reflecting solar radiation, were studied and an empirical model of the thermal behaviour was developed. The barriers were mounted below and parallel to a galvanised steel roof, set at an angle of a 20 degrees to the horizontal. A plasterboard ceiling was fitted below the barrier, and the roof mounted on a small modular building with an interior volume of approximately 29.8 cu m, the configuration of which could be changed to simulate the behaviour of different rooms. The building was fitted with temperature and radiation sensors. Model studies showed that convective heat transfer was a significant factor influencing the dry air temperature of the air layer between the ceiling and the roof. Appropriate treatment of convected heat transfer coefficients gave acceptable agreement between the experimental measurements and the model predictions. 14 refs.

Primary author(s): Miranville F;Boyer H;Mara T;Garde F

Source: Energy Build.

             Vol.35, No.10, 2003, p.997-1008




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