Typology of general form and relative compactness of residential buildings in Tehran from the perspective of climatic performance and optimization of energy consumption

This study investigates the amount of heating load, cooling load, daylight and ventilation in different types of construction in Tehran and based on the objective function, calculates the optimal building type by considering the general form and RC(relative compactness) and Introduces the basis of WWR(window to wall ratio), states of window to wall distribution and orientation.

At first, different types of building types in Tehran were extracted. The types were arranged in a modular method and were classified after calculating the RC. Then the types were modeled and simulated using software to calculate heating load, cooling load, daylight and ventilation in different modes. For each type, 60 analysis were performed and by writing the objective function, the types were compared and the optimal types was introduced.

The types with a RC=0.95, WWR=10% and West 270, had the lowest heating and cooling load. Although it has a minimum energy load, it doeschr(chr('39')39chr('39'))nt have maximum daylight and ventilation. For this purpose, after equalizing the unit and writing the target function, a building types with a RC=0.54, WWR=40% and Uniform 180 with the lowest energy consumption and the highest amount of daylight and ventilation was selected as the optimal form.

Although the building types with high RC has the least load of heating and cooling, but considering other variables, these types is not optimal in climatic performance. Therefore, the weight coefficient of variables in the objective function is very important for deciding on the energy consumption of building types.