TABLE OF CONTENTS - The Professional Green Building Council

Theme B: Creating a livable, healthy and environmentally viable citiesA PRELIMINARY TEST FOR PREDICTION OF CAVITYTEMPERATURE IN A DOUBLE-SKIN ENVELOPEYU-MIN KIM 1 , SOO-YOUNG KIM 2 , SUNG-WOO SHIN 3 , AND JANG-YEULSOHN 11 College of Architecture, Hanyang University, Seoul, South Korea2 Sustainable Building Research Center, Hanyang University, Ansan, South Koera3 School of Architecture and Architectural Engineering, Hanyang University, Ansan, South KoreaABSTRACT: This study examines thermal properties that potentially influence on energy inbuilding with double-skin envelope in order to provide fundamental data that will be used foreffective controls of cavity. Field measurements were performed in a three story building that hasdouble-skin on its eastern and western facades. Results imply that cavity temperature wassignificantly influenced by solar irradiance. The western façade was more influenced compared witheastern side due to direct irradiance and accumulated diffused irradiance as time passed by. Airvelocity thorough cavities indicate that natural ventilation occurred effectively.Keywords: double-skin, solar irradiance, air velocity, natural ventilation1. INTRODUCTIONEnergy consumption in buildings emits chemical compounds that will cause greenhouse effect. It results in serious problems in environment such as global warming.Reducing energy consumption in buildings using natural energy is considered to bea good way to reduce the negative effects.Curtain-wall structures with high ratio of glazing to wall are popularly used forhigh-rised buildings, since they have benefit to satisfy visual satisfaction. However,the structures cause increased cooling load since the higher ratio allow solarradiation to penetrate into indoor space. They also have increased heating load dueto the weak thermal resistance of glazing. This will be directly connected to energyconsumption in buildings and will cause more environmental load.To diminish the weakness of curtain wall structure, double-skin envelope wasapplied to building designs and constructed in practice. [1,2] It is considered to bea environment-friendly design since it utilizes natural ventilation so that less538