BTRL ribbon

Assessment of the ventilated double skin facade of a landmark Abu Dhabi building

The goal of the study is to examine the impact of ventilated double skin façade (DSF) on the cooling load as well as the Urban Heat Island (UHI). A detailed engineering model of a health care facility in Abu Dhabi has been prepared and calibrated using district cooling monthly bills. Being a hospital, the facility uses a 100% fresh air cooling system (no recirculation of the exhaust air). The exhaust air stream is channeled, from the bottom, into the air cavity created by the DSF, before being rejected at the top of the cavity. It is anticipated that this will attenuate the impact of the outdoor climate and reduce the cooling load of the building. A thermal network model representing the interactions between the building core and the air cavity, as well as between the outer skin and the urban canopy has been developed and tested. The hybrid model (engineering model of the core + thermal network model of the DSF), once fully calibrated, makes it possible to assess the effectiveness of the DSF in cooling load reduction and UHI mitigation.