Paper Conference

Proceedings of BSA Conference 2015: Second Conference of IBPSA-Italy


Optimizing Window size of South Facades in Tehran City and the Environmental Impacts

Fazel Khayatian, Seyed Amin Tabatabaei Fard, Maryam Meshkin Kiya

Abstract: This paper investigates the effects of altering the glazing size of lounge spaces in Tehran city houses. The magnitude of effects is demonstrated through comparing the energy consumption of various models. A great portion of the global energy consumption and resource depletion is dedicated to the construction sector. Considering the low thermal resistance of windows and their role in a building’s aesthetic, optimizing window to wall ratio is a key factor in the design process. This research attempts to find the optimum glazing area of lounge spaces while monitoring energy consumption and daylight factor simultaneously. A total of 16 samples with different width to length ratios are studied by exploring the minimum satisfactory daylight factor according to BREEAM regulations. Considering the importance of south facades in Tehran city’s urban texture, this paper is concentrated on south façade glazing proportions. Final results indicate that increasing the glazing area of a south façade after meeting the minimum required daylight factor may double the annual energy consumption of a living space. Results also show that altering the window to wall ratio of the south façade has a liner impact on the annual energy consumption of lounge spaces.
Pages: 499 - 505