Kapalı boşluklu–çift cidarlı cephelerin yoğuşma riski ve enerji performans analizleri

The condensation risk and energy performance of closed cavity façade, so called Façade Respirante was analysed in this thesis. The research is composed of three different parts whiâch are condensation risk assessment based on computational fluid dynamics (CFD) modelling, testing condensation risk in Lab environment and energy performance analysis of tested closed cavity façade. Condensation risk assessment on CFD is based on the methodology and the data obtained from CSTB (Centre Scientifique et Technique du Bâtiment) test with CLC 12-260039255 code. The methodology and the result of this test is used in order to validate the outputs of three different filter modelling which are "Model with porous media", "Model without porous media" and "Linear channel" approach. These approaches are modelled separately as 3 different CFD models. The values obtained from interior cavity match up with each 3 models in quite high level in terms of relative humidity, temperature and velocity. Dew point values at "model with linear channel" is lower with respect to other models. The reason is having higher velocities leads to lower dew points. Higher velocities with ignorable level are observed at the model with linear channel. The dew points which are obtained with August-Roches Magnus approach in the middle of cavity between venetian blind and exterior glass are considerably lower than temperature on glass surface with same height. Therefore, there is no condensation in all specified CFD models with indicated conditions. There is also analysis with respect to filter distance change to exterior side. When filter gets closer to interior side, relative humidity next outer glass becomes higher. Filter position influences more bottom part of cavity from temperature, velocity and relative humidity aspect. As a result, Façade Respirante model is developed without any condensation under specified conditions by considering comprehensive CFD results. Closed cavity façade (Façade Respirante) experiment module is configured based on comprehensive CFD results. Configured closed cavity façade is tested at FTI (Façade Testing Institute) Labs in Istanbul Turkey. Experiment results indicates that there is high tendency to condensation formation at venetian blinds vertically positioned case. On the other hand, when the blinds are removed, there is less probability to form condensation on outer glass surface Moreover, as long as number of filter decrease, there is higher condensation risk. There is no condensation formation on glass surfaces, if there is at least 5 filters at bottom side of configured façade respirante system. Energy performance analysis is composed of two parts which are façade's thermal and energy performance analyses.The simulation for thermal analyses on specified aluminium surfaces of Façade Respirante shows that there is no condensation. Final Uw value of closed cavity façade module is determined as 1.56 W/m2K and 0.39 solar factor with respect to specified standards. The comparison with reference window which has 2.40 W/m2K and 0.42 solar heat gain coefficient based on TS 825 standard are made to evaluate the heat transfer due to temperature difference and solar radiation intensity. Consequently, there is monthly up to 6.4 W/m2 and annually up to 17.8 W/m2 saving in cooling load by applying cloesd cavity façade (CCF) system. Besides, there is monthly up to 23.6 W/m2 and annually up to 130.5 W/m2 saving in heating load by applying CCF system. There is up to 130.5 W/m2 heat transfer rate difference in Turkey. It means, it can be up to 339.3 kWh annual saving for each m2 of window. Configured CCF system with 339.3 kWh for each m2 energy saving potential, decrease 234 kg CO2 emission in a year which corresponds to 6 trees CO2 emission toleration.