A Comparative Study of the Types of Atriums Form and Skylight to Improve the Energy Efficiency in Educational Buildings in Tehran

Document Type : Original Article

Authors
Ahmadreza Keshtkar Ghalati 1
Maryam Farahkhiz 2
1 Assistant Professor, Department of Architecture, Faculty of Art and Architecture, Kharazmi University, Tehran, Iran.
2 M.Sc. in Architecture and Energy, Department of Architecture, Faculty of Architecture, Rassam Institute of Higher Education, Karaj, Iran.
10.22034/usd.2024.2014712.1154
Abstract
Atrium, as a passive light absorbing solution, in addition to having positive psychological effects due to creating a connection between indoor and outdoor space, may increase the heat in the hot season of the year and increase the cooling load if there is no ventilation and shading on the glass surfaces. Therefore, the atrium should be measured with criteria and patterns of energy consumption reduction, otherwise, it will impose a significant energy load on the building. Many studies on the daylighting of atriums have been investigated and have shown that the daylighting performance of an atrium largely depends on its geometrical characteristics. The main features of atriums can be categorized into three parts: (1) skylight system (skylight height, shape, scale); (2) atrium form (well height, shape, scale); and (3) surrounding interface (corridors, windows, etc.). In this research, two important components of the atrium form and the geometry of the roof skylight have been investigated. The purpose of this study is to compare the different forms of the atrium body and its skylight roof in an educational space in order to optimize energy consumption. For this purpose, Design Builder software has been used for data simulation and analysis, as well as Energy Plus engine for calculations. In this regard, the initial model with three different plans of the atrium was simulated in the design-builder software and the optimal plan was determined according to the amount of energy consumption, and then three types of skylight roofs were added to the atrium and the amount of energy consumption in them was checked again. In this project, the dimensions of the plans are considered so that they have the same area. In the first stage of the research, three plans with the same areas with three forms of circle, square, and rectangle are simulated and the amount of energy consumption in each is obtained. At this stage, the energy analysis results obtained from three atrium forms are compared, then the most optimal form is selected in terms of energy consumption. Calculations related to energy consumption have been evaluated separately and the amount of energy consumed by equipment, lighting, heating, cooling, and the amount of energy for hot water consumption have also been determined. The results show that in different atrium plans with the same area, in the circular plan, the total energy consumption is 215.5 (MWh), and this amount is 215.9 (MWh) in the square plan and 216.77 (MWh) in the rectangular plan. Therefore, the atrium plan form with a circular plan has the best function and the rectangular form has the weakest energy efficiency. In the second step, three forms of spherical, flat, and cylindrical skylights with a height of 1.20 were simulated. The results showed that the amount of energy consumption in the building with a flat skylight is 207.1 (MWh), in the atrium with a spherical skylight is 222.83 (MWh), and in the atrium with a cylinder skylight is 215.5 (MWh). Therefore, it can be concluded that the atrium with a circular plan form and a flat skylight has a more effective energy efficiency than other forms.

Keywords

Subjects

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Journal of Urban Sustainable Development
Volume 6, Issue 18
Spring 2025
Pages 81-95