Residential Attic with Radiant Barrier System: Finite Element Simulation and Parametric Study

The current study involves developing a three-dimensional transient finite element (FE) model to evaluate the thermal performance of an attic radiant barrier system (ARBS) as an energy efficient technology. The heat transfer modes of convection, radiation, and conduction were considered in the FE model. The results from the FE analysis were then validated based on hourly experimental data collected in houses located in Zachary, Louisiana. Upon validation, the design variables and their influence on the performance of the radiant barrier insulation system were also studied. Accordingly, the existence of an air gap on both sides of the radiant barrier and the emissivity of asphalt shingle were found to have a significant effect on the performance of the radiant barrier insulation system in comparison with other design factors.