Comparison of the Fixed External Sun Shading Devices Performance in order to Daylight Control (Case Study: Southern Facade in Yazd Climate)

With the advancement of technology, there has been an increase in energy consumption. For example, in hot and dry climates, where the amount of heat and sunlight is high during the day, it causes too much sunlight to enter the interior and increases the temperature, which increases the consumption of cooling energy. Fixed sun shading in this climate can greatly reduce cooling energy consumption. Therefore, the purpose of this study is to identify different types of fixed external sun shading devices and finally select the best of them in terms of performance to optimize energy consumption in hot and dry climates.

The research method is quantitative and simulation-modeling. The data collection tool for the theoretical foundations section is library and documentary. In this way, the fixed sun shading devices are modeled in Rhino 6 software and Grasshopper plugin. After that, the climate of Yazd, which is hot and dry, has been selected for energy analysis by the Ladybug Tools 1.1.0 in a Grasshopper environment in order to achieve a suitable type of fixed external sun shading devices in hot and dry climates. Thermal analyzes have been performed in Ecotect software.    

The results of the present research show that the geometric, eggcrate and horizontal shading devices have the best performance in terms of optimizing energy consumption.  

Therefore, considering that geometric shading devices are very similar to the shading devices in traditional Iranian architecture, it can be concluded that proper innovation by preserving the principles and avoiding blind imitation of the past can be desirable and economical solutions to the problems of the present age.