Authors : R. Family, S. Celik and, M. P. Menguc
Conference : SBE16 Smart Metropoles, Integrated Solutions for Sustainable and Smart Buildings & Cities Conference
Place and date : Istanbul, Turkey, October 13-15, 2016
Abstract:
In this study, selected building materials are evaluated numerically and experimentally to explore their radiative and conductive heat transfer characteristics. The purpose for radiation part is to evaluate sustainable materials for buildings with desired spectral and directional performances to decrease the heating loads. For situations where a surface is to be kept cool while exposed to the sun, the objective is to have maximum reflection of solar energy with maximum radiative emission from the surface (radiative cooling). Such materials are called “spectrally selective.” Spectrally selective materials can also be useful where it is desirable to cool an object exposed to incident radiation from a high-temperature source. Conduction heat transfer through these materials was also investigated since the main objective in choosing materials for roofs is to come up with high-resistance, low-cost insulation materials which also are of low density for the sake of reduced weight. Reverse heat leak method is used in determination of R-values of all samples. Materials for this purpose were developed and fabricated. They were tested using an insulated test chamber which was built for this study. The characteristics and the details of these materials are discussed for optimization of both radiation and conduction transfer through them.