Determining the infiltration and exfiltration in Supertall and Mega Tall Buildings

Abstract

Most traditional heating and cooling load calculations are based on weather conditions measured at a height of 10 m. But how appropriate is this in Super-Tall buildings 300m+ and Mega-Tall Buildings 600m+? This paper will present some specifics of evaluating building designs and performance in Tall Buildings. From previous designs and research, we know that outdoor conditions vary with height. and the outside climate can have both a positive and a negative effect on the space conditions within the building. This paper illustrates the fluctuation of pressure differentials on the heating and cooling loads of spaces over the height of the building. Rarely does the design of the upper level of the building capitalize on this phenomenon. Furthermore, wind, temperature, and pressure conditions at the top of a tall building are considerably different, therefore façade leakage rates and the buildings stack effect must be carefully assessed. If sufficient data is known about this difference, it can be incorporated to optimize the overall building design. This novel paper explores the nuances of the ambient climate on tall buildings and the effects on the performance of the building.