EFFECTIVENESS OF DOUBLE SKIN FAÇADE TO CONTROL INDOOR THERMAL ENVIRONMENT

• Main Author: DIINAL AZIIZ (NIM : 25215003), AKHLISH
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/20893
• Institution: Institut Teknologi Bandung

Indonesia area acquires plenty of sun light throughout the year, which has relatively high air temperatures and affects the comfort level for building <br /> <br /> The high temperature of the air inside the building provides a large cooling load of space and requires a lot of electrical energy. The use of artificial cooling is almost inevitable in the construction of buildings, especially on high-rise buildings in Indonesia. Efforts to reduce the use of artificial cooling (AC) is one program to suppress the consumption of electrical energy. Installation of double façade systems in buildings can reduce the recovery of heat energy from the sun thereby decreasing the cooling load of buildings. <br /> <br /> Several studies in sub-tropical climates reveal that this system is effective for controlling building air temperature, whereas, its effectiveness in tropical regions such as Indonesia is not widely known. <br /> <br /> This research uses 1: 1 scale test model placed at Gedung Pusat Riset dan Inovasi ITB Lt. IV which facing east so it can be sun light exposed directly and can be measured from morning until late noon. In this model is used variable distance (air gap) DSF and variable type of glass. Distance variations include 0.5, 0.1, and 1.5 meters from the outer shell of the building to see the effect of DSF distance on the delay and reduction of heat coming into the building. While the type of glass variables allegedly can control solar radiation into the building. The effects of these two factors are seen through the values of air temperature, black ball temperatures, and glass surface temperatures. It also measured the speed of airflow in the air gap where the effects of airflow were seen through decreasing air temperature in the DSF gap and the space in the building. <br /> <br /> This study revealed that the distance of DSF 1.5 meter managed to lower the temperature of 5.460 C rather than 0.5 m distance of 4,690 C due to longer delay the entry of heat in the building. While the type of glass that has a high reflectance, value has the potential in lowering the air temperature in the building of 7.70 C while the glass material that has high heat absorbency value only decreased by 2.260 C. While the study of the air flow rate showed relatively high airflow in the narrow façade gap of 0.38 m / s, compared to a distance of 1 m of 0.43 m / s and 1.5 m of 0.36 m / s. However, the speed of airflow is not much lower the air temperature, only has a difference of 0.030 C. Thus, the effectiveness of double facades with a distance of 1.5 meters and glass material with high reflectance characteristic value has greater potential in lowering the air temperature inside the building. <br />