Analysis of transient effects on the performance of advanced double and single skin facades including transparent insulation. Numerical study and experimental validation

摘要

Transparent insulation materials are being used in advanced facades, in order to avoid thermal losses while keeping large solar gains. A transient and one-dimensional numerical model has been developed to simulate single and double skin facades including honeycomb-type transparent insulation. Radiative heat transfer equation is solved considering a one-dimensional plane-parallel medium, with a discrete ordinate method, assuming azimuthal symmetry and two spectral bands: solar and thermal. The numerical model has been validated by comparison with analytical solutions and experimental data. A long-term numerical analysis of the performance of single and double skin facades including transparent insulation has been carried out, in order to determine the heating demand of a room with different types of fenestration systems.