Paper Conference

Proceedings of Building Simulation 2011: 12th Conference of IBPSA


Effective absorptances and emittances of opaque surfaces and their impact on simulations of thermal and energy performance of buildings.

Victor Figueiredo Roriz, Rosana Maria Caram, Maurício Roriz

Abstract: On surfaces perfectly flat and smooth, there are no obstacles to the radiant flow. However, typical surfaces of buildings have bumps and hollows that Table 1 Effect of roughness on effective emittance (adapt from: MARCHETTI, BOUDENNE E CANDAU, 2008). can significantly change the behaviour of them. The real absorptances and emittances resulting from these surface irregularities could be called effective. This paper presents a simple method developed to evaluate these influences.
Pages: 2017 - 2023