The Influence of Canyon Asymmetry on Heating and Cooling Energy Demand of Buildings in the Mediterranean Climate of the Gaza Strip

Abstract

This paper shows the effect of canyon asymmetry on the energy consumption of buildings in the Mediterranean climate of the Gaza strip. The study was conducted using threedimensional computer models, namely, ECOTECT and IDA ICE. The ratio of the opposite buildings heights ranging from 0.2 to 3.2 were examined in the study at two different orientations, which are (EW) and (NS). The results showed that the asymmetrical profiles seemed to have a significant influence on the thermal response of buildings. The ratio which ranges between 1.2 to 2.0 is more preferable for both cooling and heating requirements. The received solar radiation is reduced by 14.02% and 55.02% in summer with increasing the buildings heights ratio at (NS) and (EW) streets respectively from 1.0 to 3.2. Asymmetrical canyon with the highest ratio provides the maximum energy savings throughout the year especially in the upper floors. About 29.53% of energy consumption can be reduced by choosing the opposite building height equal to the examined building height+ 5floor. Therefore, the study recommends to utilize the advantages of the different heights of buildings in achieving shading on the roof and building’s façades for the purpose of energy saving.