Evaluation of the Effects of Central Atrium Design on Thermal Loads of Office Buildings in Isfahan in order to Derive an Energy Performance Algorithm

Document Type : Original Article

Authors

1 Department of Architecture, Na.C., Islamic Azad University, Najafabad, Iran

2 Architecture Department, Ilam University, Ilam, Iran

3 Department of Architecture, Advancement in Architecture and Urban Planning Research Center, Na.C., Islamic Azad University, Najafabad, Iran

Abstract

The increase in energy consumption in the office buildings in hot and dry climates has doubled the need to pay attention to architectural solutions, especially the design of the central atrium. This study aims to evaluate the effect of atrium design on thermal loads and extract an algorithm for predicting energy performance, examining the Amir Kabir office complex in Isfahan as a case study. The main research question is "which combination of geometric and physical features of the atrium can create the most optimal energy performance in office buildings in hot and dry climates". Design Builder and statistical analysis, using multivariate regression in the SPSS environment, were used as in this paper. The variables studied included the type of plan (open and combined), the ratio of the building and atrium dimensions (R1, R2, R3), the percentage of the atrium area (10%, 20%, 30%), and the type of atrium (without opening, with a skylight opening and with a roof canopy with different angles) simulated in the form of 54 scenarios. The findings showed that a 5-degree roof canopy was the most effective factor in reducing annual cooling load and energy consumption, while atriums without a canopy or opening created the highest thermal load. Also, the combination of R3 volumetric form (length to width ratio 3:2) with an open plan and appropriate canopy design provided optimal thermal performance in some scenarios. Finally, the algorithms obtained from regression analysis allowed for the prediction of annual heating, cooling, and energy consumption loads and could be used as a practical tool for architects’ decision-making in the early stages of designing office buildings in hot and dry climates.

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Main Subjects


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