Mathematical model for calculating the shaded and sunlit areas in a circular courtyard geometry

Muhaisen, Ahmed S.; Gadi, Mohamed B.

doi:10.1016/j.buildenv.2004.12.018

Cited by 39 publications

(17 citation statements)

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“…It is concluded that geometry has a vital role in thermal behavior of such courtyards along with proper orientation and regulating ventilation as well as appropriate shadowing could improve the microclimatic situation. Muhaisen and Gadi's research on circular, polygon and rectangular courtyards indicate dimensions, proper proportion, latitude and climatic conditions are effective in terms of appropriate shadowing in a courtyard (Muhaisen & Gadi, 2006a) (Muhaisen & Gadi, 2005) (Muhaisen, 2006). They also suggest the optimum height for rectangular courtyards in hot and humid, hot and dry, temperate and cold climates are 4, 2 and 1 floor respectively.…”

Section: Introductionmentioning

confidence: 98%

Numerical evaluation of thermal comfort in traditional courtyards to develop new microclimate design in a hot and dry climate

Nasrollahi

Hatami

Khastar

et al. 2017

Sustainable Cities and Society

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The growing interest in thermal comfort of outdoor environments yields in different analysis on courtyards as a common space between urban and architectural scales. However, there is a limited knowledge regarding the microclimatic behavior of such spaces. Using ENVI-met simulations, this paper aims to numerically discuss the thermal performance of different configurations of traditionally designed courtyards in Shiraz, Iran, which experiences hot summers and cold winters. The geometrical effects such as orientation and H/W (height to width ratio) of courtyards are considered as potential parameters to improve the microclimatic conditions. In this paper, PMV and UTCI are used as thermal comfort indices.The obtained results indicate mean radiant temperature and wind speed as the most effective parameters for thermal comfort of courtyards. In addition, the aforementioned geometrical parameters might not be able to solely create a desirable condition, but they could significantly improve the thermal comfort of courtyards during summer and winter. To achieve a desirable thermal comfort level, the results suggest using configurations of a high H/W rate and southward orientation in order to obtain better shading during summer as well as allowing the solar radiation in while regulating the wind speed in winter.

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Section: Introductionmentioning

confidence: 98%

Numerical evaluation of thermal comfort in traditional courtyards to develop new microclimate design in a hot and dry climate

Nasrollahi

Hatami

Khastar

et al. 2017

Sustainable Cities and Society

View full text Add to dashboard Cite

show abstract

“…From the literature survey it appeared that shallow courtyards perform better than deeper ones during winter; however, courtyards having deep forms require low energy for cooling in summer [15,24,25]. With regard to the achievement of an optimum height for courtyard building, Muhaisen (2006) suggested three stories in hot, humid climates, two stories in hot, dry, and temperate climates, and one story in a cold climate [26].…”

Section: Building Heightmentioning

confidence: 99%

“…Courtyard thermal performance is mainly affected by the solar radiation penetration of the internal envelope, which is dependent on the courtyard geometrical parameters and the sun's position [15,24,25]. Shading and exposure conditions on the internal envelope of the courtyard are affected by rectangular courtyard proportions [26].…”

Section: Shape Of the Courtyardmentioning

confidence: 99%

“…Energy efficiency is becoming more of a priority in recent years because energy consumption is becoming a crisis [15]. The commercial buildings sector consumes a huge amount of energy and its energy consumption pattern will likely increase sharply in the near future [16].…”

Section: Literature Reviewmentioning

confidence: 99%

“…Muhaisen and Gadi (2005) showed that shallow courtyards perform better than deeper ones [15]. Muhaisen and Gadi (2006a) found that deep courtyards require less energy for cooling in summer [24].…”

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confidence: 99%

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An Investigation into Energy Performance with the Integrated Usage of a Courtyard and Atrium

Tabesh

Sertyeşilışık

2016

Buildings

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Offices and retail spaces are among the most energy-intensive building typologies. Designing office buildings without proper consideration of their form, orientation, envelope, and other variables can lead to a considerable increase in energy usage. This research investigates how integrated usage of an atrium and courtyard can improve a building's energy performance. Thermal performance of both atrium and courtyard spaces as well as their energy-efficient integrated usage in office buildings have been investigated within the scope of this research. DesignBuilder as an interface and EnergyPlus (based on ASHRAE, the American Society of Heating, Refrigeration, and Air-Conditioning Engineers) as analytical software have been used to investigate the thermal behavior of an atrium and courtyard in two stages. From the results it appeared that a courtyard with 40% window-to-wall ratio and triple glazing has the best energy performance, while those with single glazing and an 80% window-to-wall ratio represent maximum energy consumption in all climates. The findings also revealed that the integrated usage of a courtyard and atrium can save energy if it is used as a courtyard type of building during summer in all climates and if it is used as an atrium in the cold months. This research is original and will contribute to the literature, as it investigates the integrated usage of an atrium and courtyard with respect to energy efficiency. This research is expected to be beneficial to professionals and academics, especially with respect to the energy-efficient use of courtyards, atria, and their integrated modes. Furthermore, the findings can contribute to the sustainability performance of the built environment through an integrated atrium-courtyard building, resulting in minimal energy consumption.

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Courtyard’ Design as a Sustainable Tool for Classrooms’ Lighting and Thermal Performance

Salameh

Touqan

2023

Advances in Civil Engineering Materials

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Mathematical model for calculating the shaded and sunlit areas in a circular courtyard geometry

Cited by 39 publications

References 1 publication

Numerical evaluation of thermal comfort in traditional courtyards to develop new microclimate design in a hot and dry climate

Numerical evaluation of thermal comfort in traditional courtyards to develop new microclimate design in a hot and dry climate

An Investigation into Energy Performance with the Integrated Usage of a Courtyard and Atrium

Courtyard’ Design as a Sustainable Tool for Classrooms’ Lighting and Thermal Performance

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