The air may contain water vapor to limit an amount which depends on its temperature. When the moisture content contained in the air is max, is said is saturated. The higher the air temperature, the greater the mass of water vapor that it can contain without reaching the saturation point. Condensation: This phenomenon can occur in buildings facades as, even if the ambient air is not saturateddo, during nighttime, the outer surfaces of buildings tend to be at lower temperature than the outside air, due to loss of thermal energy by long-wave radiation to the sky. The temperature below which condensation starts to occur is dew point temperature call. Depending on the facade material, the night cooling can be more or less intense. Facades with lower thermal resistance and higher thermal capacity less tend to cool because the heat accumulated during the day on the sealing material and the internal environment of the building is transmitted on a larger scale abroad, reducing the effect of external cooling. One of the materials that have contributed to this improvement is the concrete with incorporated air.
Estefano Jefferson de Oliveira - Civil Engineer SMC Engineering Project.
