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Open AccessArticle

The Impact of Iwan as a Traditional Shading Device on the Building Energy Consumption

Department of Architecture, Faculty of Architecture and urbanism, Art University of Isfahan, 8146834615 Isfahan, Iran
Department of Architecture, Faculty of Art and Architecture, Tarbiat Modares University, 14115116 Tehran, Iran
Author to whom correspondence should be addressed.
Buildings 2018, 8(1), 3;
Received: 11 October 2017 / Revised: 5 December 2017 / Accepted: 6 December 2017 / Published: 27 December 2017
(This article belongs to the Special Issue Innovative Approaches to Achieving Building Energy Efficiency)
In this paper, the effect of an exterior shading element (Iwan) on energy consumption in four different climatic regions and for different orientations, has been investigated numerically and experimentally. By applying different materials and techniques and creating various elements and spaces, architects make hard climatic conditions more tolerable for residents. Iwan is one of the cooling elements which is used in different forms and dimensions in the Islamic architecture. In the present research, Iwan has been introduced as a climatic element in traditional and contemporary architectures and its role in reducing the energy consumption in buildings has been studied. In this respect, first, the thermal loads of a building without Iwan are computed using the EnergyPlus software. Then, four different forms of Iwan are added to the above-mentioned structure along the four principal orientations, moreover, the effect of Iwan on the reduction of thermal loads is analyzed for four different climates. Finally, the design parameters of Iwan, in terms of depth and form, which can help reduce the thermal loads in different climatic conditions are presented. The results show that the best position for using an Iwan is the south direction and the use of Iwan in temperate & humid, hot & humid, cold & mountainous and hot & dry climates could reduce the energy consumption in buildings by 32%, 26%, 14% and 29%, respectively. View Full-Text
Keywords: shadings; thermal performance; Iwan; experimental; EnergyPlus shadings; thermal performance; Iwan; experimental; EnergyPlus
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Eskandari, H.; Saedvandi, M.; Mahdavinejad, M. The Impact of Iwan as a Traditional Shading Device on the Building Energy Consumption. Buildings 2018, 8, 3.

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