Investigating the Effect of the Distance between the Two-shell facades on the Thermal Load in an Office Building in the Hot and Dry Climate of Isfahan City

Subject Areas : Sociology, social sciences and economics

Niloofar Adhamian ¹ (Master's degree, Architecture and Energy, Advanced Scholars Institute of Higher Education, Isfahan, Iran (corresponding author))
Maryam ّFarhadian ² (Post-doctoral researcher of Tokyo City University, Tokyo, Japan and visiting assistant professor of architecture department, non-profit non-governmental leading scholars, Isfahan, Iran)
Afrooz Rahimi Ariyae ³ (Assistant Professor of the Department of Architecture, Non-Governmental Non-Profit Higher Education Sepehr Danesh Mazares, Isfahan, Iran)

Received: 2023-11-05 Accepted : 2024-05-23 Published : 2024-08-31

Keywords: Energy consumption reduction, Office building, Double-skin facade, Thermal load, Cavity depth, Hot and dry climate,

Abstract :

In modern architecture, the transition from load-bearing wall systems to frame structures has enabled increased transparency to enhance natural light intake in buildings. However, the increased use of glass surfaces has led to higher energy consumption and increased heat loss in buildings. This challenge is more significant in cold and hot climates with higher temperature differentials. In this regard, one cost-effective technique in passive methods is the implementation of double-skin facades in buildings. The use of double-skin facades as a novel technology for energy savings in contemporary buildings has a significant impact on determining optimal facade behavior. The main issue addressed in this research is the assessment of the thermal load and the performance of the building envelope in heat exchange. Therefore, the main objective of this study is to achieve the optimal distance between the double skins to improve the thermal load of office buildings in the hot and dry climate of Isfahan city. This paper extracts the influential components on the thermal performance of the outer walls of office buildings based on theoretical foundations and then identifies scenarios accordingly. The software used for simulation in this research is Design Builder. Eventually, ten different scenarios of the distance between the double skins ranging from 200 millimeters to 200 centimeters in the south direction of the building were analyzed for thermal performance, and the best scenario was selected. The results indicate that the distance between the double skins has a considerable impact on thermal load performance. In fact, with an increase in the distance between the double skins, the thermal load decreases. Based on the analyses, the optimal system in terms of overall loads is a double-skin facade with a 2-meter distance between the two skins. These findings can be useful in the design of office buildings in hot and dry climates

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