Volume 10, Issue 2 (2020)
Naqshejahan 2020, 10(2): 137-152 |
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Saligheh E, Saadatjoo P. Impact of Central Courtyard Proportions on Passive Cooling Potential in Hot and Humid Regions (Case Study: Single-story Buildings in Bandar Abbas). Naqshejahan 2020; 10 (2) :137-152
URL: http://bsnt.modares.ac.ir/article-2-40649-en.html
URL: http://bsnt.modares.ac.ir/article-2-40649-en.html
1- Architecture Department, Civil Engineering Faculty, Tabriz University, Tabriz, Iran
2- Architecture Department, Civil Engineering Faculty, Tabriz University, Tabriz, Iran , paria.saadatjoo@tabrizu.ac.ir
2- Architecture Department, Civil Engineering Faculty, Tabriz University, Tabriz, Iran , paria.saadatjoo@tabrizu.ac.ir
Abstract: (5169 Views)
Aims: The central courtyard can play an important role in reducing energy consumption, increasing shading, enhancing the flow of passage and creating evaporative cooling in windphil buildings. This paper seeks to examine the role of central courtyard proportions in the amount of shading, radiant energy received, cooling load and natural ventilation potential.
Methods: The research method in this research is a descriptive-analytical one in which the software of Design builder 6.1.2.009, Computational Fluid Dynamics (CFD), and Ecotect 2011 were applied to investigate the effect of central yard width change on wind flow pattern, shading pattern and the amount of radiant energy received and the calculation cooling load of windphil architecture.
Findings: Comparing U-shaped quadruple buildings with a central courtyard with a fixed volume-to surface ratio, the 4-meter-wide courtyard building model is the best option. Changing the width of central courtyard from 4 to 10 meters resulted in a %13 increase in cooling load and a %10 decrease in shaded areas. However, increasing the width of the courtyard from 4 to 6 meters resulted in a speed reduction of 18.75% and a change of width from 6 to 10 meters lead to a 6% increase in flow rate.
Conclusion: Increasing the width of the central courtyard degrades the passive cooling potential of the building. As a result, a courtyard would perform as an efficient passive cooling system when its proportions are approximately 1: 2.5.
Methods: The research method in this research is a descriptive-analytical one in which the software of Design builder 6.1.2.009, Computational Fluid Dynamics (CFD), and Ecotect 2011 were applied to investigate the effect of central yard width change on wind flow pattern, shading pattern and the amount of radiant energy received and the calculation cooling load of windphil architecture.
Findings: Comparing U-shaped quadruple buildings with a central courtyard with a fixed volume-to surface ratio, the 4-meter-wide courtyard building model is the best option. Changing the width of central courtyard from 4 to 10 meters resulted in a %13 increase in cooling load and a %10 decrease in shaded areas. However, increasing the width of the courtyard from 4 to 6 meters resulted in a speed reduction of 18.75% and a change of width from 6 to 10 meters lead to a 6% increase in flow rate.
Conclusion: Increasing the width of the central courtyard degrades the passive cooling potential of the building. As a result, a courtyard would perform as an efficient passive cooling system when its proportions are approximately 1: 2.5.
Article Type: Original Research |
Subject:
Highperformance Architecture
Received: 2020/02/12 | Accepted: 2020/03/14 | Published: 2020/09/20
Received: 2020/02/12 | Accepted: 2020/03/14 | Published: 2020/09/20
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