Optimizing Courtyard Design for Thermal Performance: A Study on Shadow and Sunlight Dynamics in Traditional Houses

Akhlaghinezhad, Fateme; Mohajerani, Mostafa; Bagheri Sabzevar, Hadi

doi:10.22034/ijumes.2024.2019088.1190

Optimizing Courtyard Design for Thermal Performance: A Study on Shadow and Sunlight Dynamics in Traditional Houses

Document Type : Original Article

Authors

Fateme Akhlaghinezhad

Mostafa Mohajerani

Hadi Bagheri Sabzevar

Department of Architecture and Urbanism, Hakim Sabzevari University, Sabzevar, Iran

10.22034/ijumes.2024.2019088.1190

Abstract

The rising interest in outdoor activities in modern society is influenced by evolving urban lifestyles and complex city infrastructures. Courtyards are central in this shift, impacting microclimates and managing shadows and sunlight for thermal comfort. This study explores how traditional houses, particularly courtyards, adapt to challenging weather, focusing on the relationship between their design elements and their impact on shadow and sunlight. The goal is to optimize courtyard design for better shadow and sunlight during both summer and winter. Data from 16 traditional courtyard houses in the hot, dry climate of Yazd were analyzed using ENVI-met software for the Shadow-Sunlit index. The findings highlight the significant effects of width-to-height and length-to-width ratios, and courtyard orientation on this index, accounting for 70.9%, 25.7%, and 3.4% respectively. The Arab-ha House emerged as an exemplar for optimizing shadow and sunlight dynamics. This research emphasizes the importance of courtyards in urban design and contributes to advancing sustainable architectural practices.

Keywords

Shadow-Sunlit index

Courtyard

Geometry

Hot-dry Climate

Yazd

Abass, F., Ismail, L. H., & Solla, M. (2016). A review of courtyard house: History, evolution, forms, and functions. ARPN Journal of Engineering and Applied Sciences, 11(4), 2557-2563.
Akbari, H., & Niazi Motlagh Joonaghani, N. (2022). Analysis of the geometric and natural properties of courtyards in historical houses of Isfahan (Iran). Journal of Asian Architecture and Building Engineering, 21(5), 1879-1890.
Aldawoud, A. (2008). Thermal performance of courtyard buildings. Energy and Buildings, 40(5), 906-910.
Amasyali, K., & El-Gohary, N. M. (2018). A review of data-driven building energy consumption prediction studies. Renewable and Sustainable Energy Reviews, 81, 1192-1205.
Bruse, M., & Fleer, H. (1998). Simulating surface–plant–air interactions inside urban environments with a three-dimensional numerical model. Environmental Modelling & Software, 13(3-4), 373-384.
Cao, X., Dai, X., & Liu, J. (2016). Building energy-consumption status worldwide and the state-of-the-art technologies for zero-energy buildings during the past decade. Energy and Buildings, 128, 198-213.
Coffel, E. D., Keith, B., Lesk, C., Horton, R. M., Bower, E., Lee, J., & Mankin, J. S. (2019). Future hot and dry years worsen Nile Basin water scarcity despite projected precipitation increases. Earth’s Future, 7(8), 967-977.
de la Flor, F. J. S., Ruiz-Pardo, Á., Diz-Mellado, E., Rivera-Gómez, C., & Galán-Marín, C. (2021). Assessing the impact of courtyards in cooling energy demand in buildings. Journal of Cleaner Production, 320, 128742.
Fazlikhani, F., Goudarzi, H., & Solgi, E. (2017). Numerical analysis of the efficiency of earth to air heat exchange systems in cold and hot-arid climates. Energy Conversion and Management, 148, 78-89.
Foruzanmehr, A. (2012). Summer-time thermal comfort in vernacular earth dwellings in Yazd, Iran. International Journal of Sustainable Design, 2(1), 46-63.
Haji-Qassemi, K. (2003). Iranian Islamic architecture(Vol. 14). Yazd houses. Iran: Rowzaneh Publication.
Hao, S., Yu, C., Xu, Y., & Song, Y. (2019). The effects of courtyards on the thermal performance of a vernacular house in a hot-summer and cold-winter climate. Energies, 12(6), 1042.
Izadpanahi, P., Farahani, L. M., & Nikpey, R. (2021). Lessons from sustainable and vernacular passive cooling strategies used in traditional Iranian houses. Journal of Sustainability Research, 3(3).
Karimi, A., Kim, Y. J., Zadeh, N. M., García-Martínez, A., Delfani, S., Brown, R. D., Moreno-Rangel, D., & Mohammad, P. (2022). Assessment of outdoor design conditions on the energy performance of cooling systems in future climate scenarios—A case study over three cities of Texas, United States. Sustainability, 14(22), 14848.
Kubota, T., Zakaria, M. A., Abe, S., & Toe, D. H. C. (2017). Thermal functions of internal courtyards in traditional Chinese shophouses in the hot-humid climate of Malaysia. Building and Environment, 112, 115-131.
Liu, S., Kwok, Y. T., Lau, K. K.-L., Ouyang, W., & Ng, E. (2020). Effectiveness of passive design strategies in responding to future climate change for residential buildings in hot and humid Hong Kong. Energy and Buildings, 228, 110469.
Martinelli, L., & Matzarakis, A. (2017). Influence of height/width proportions on the thermal comfort of courtyard typology for Italian climate zones. Sustainable Cities and Society, 29, 97-106.
Muhaisen, A. S., & Gadi, M. B. (2006a). Effect of courtyard proportions on solar heat gain and energy requirement in the temperate climate of Rome. Building and Environment, 41(3), 245-253.
Muhaisen, A. S., & Gadi, M. B. (2006b). Shading performance of polygonal courtyard forms. Building and Environment, 41(8), 1050-1059.
Mushtaha, E., Shareef, S., Alsyouf, I., Mori, T., Kayed, A., Abdelrahim, M., & Albannay, S. (2021). A study of the impact of major urban heat island factors in a hot climate courtyard: The case of the University of Sharjah, UAE. Sustainable Cities and Society, 69, 102844.
Nasrollahi, N., Hatami, M., Khastar, S. R., & Taleghani, M. (2017). Numerical evaluation of thermal comfort in traditional courtyards to develop new microclimate design in a hot and dry climate. Sustainable Cities and Society, 35, 449-467.
Rodríguez-Algeciras, J., Tablada, A., Chaos-Yeras, M., De la Paz, G., & Matzarakis, A. (2018). Influence of aspect ratio and orientation on large courtyard thermal conditions in the historical centre of Camagüey-Cuba. Renewable Energy, 125, 840-856.
Sabzevar, H. B., Ahmad, M. H., & Gharakhani, A. (2014). Courtyard geometry on solar heat gain in hot-dry region. Advanced Materials Research, 935, 76-79.
Sabzevar, H. B., Masomi, M., & Tarzafan, S. (2017). Dormitory courtyard proportion and orientation in Yazd, Iran on energy consumption. International Journal of Architectural Engineering and Urban Planning, 27(2), 75-81.
Shaeri, J., Yaghoubi, M., & Habibi, A. (2018). Influence of iwans on the thermal comfort of talar rooms in the traditional houses: A study in Shiraz, Iran. Buildings, 8(6), 81.
Simon, H., Lindén, J., Hoffmann, D., Braun, P., Bruse, M., & Esper, J. (2018). Modeling transpiration and leaf temperature of urban trees–a case study evaluating the microclimate model ENVI-met against measurement data. Landscape and Urban Planning, 174, 33-40.
Soflaei, F., Shokouhian, M., & Shemirani, S. M. M. (2016). Investigation of Iranian traditional courtyard as passive cooling strategy (a field study on BS climate). International Journal of Sustainable Built Environment, 5(1), 99-113.
Soflaei, F., Shokouhian, M., & Soflaei, A. (2017). Traditional courtyard houses as a model for sustainable design: A case study on BWhs mesoclimate of Iran. Frontiers of Architectural Research, 6(3), 329-345.
Sun, X., Gou, Z., & Lau, S. S.-Y. (2018). Cost-effectiveness of active and passive design strategies for existing building retrofits in tropical climate: Case study of a zero energy building. Journal of Cleaner Production, 183, 35-45.
Taleb, H. M. (2014). Using passive cooling strategies to improve thermal performance and reduce energy consumption of residential buildings in UAE buildings. Frontiers of Architectural Research, 3(2), 154-165.
Taleghani, M., Kleerekoper, L., Tenpierik, M., & Van den Dobbelsteen, A. (2015). Outdoor thermal comfort within five different urban forms in the Netherlands. Building and Environment, 83, 65-78.
Teshnehdel, S., Bahari, M., & Mirnezami, S. (2019). Traditional courtyards as a microclimate in the improvement of human thermal comfort condition. Landscape Architecture Regional Planning, 4(3), 53.
Teshnehdel, S., Mirnezami, S., Saber, A., Pourzangbar, A., & Olabi, A. G. (2020). Data-driven and numerical approaches to predict thermal comfort in traditional courtyards. Sustainable Energy Technologies and Assessments, 37, 100569.
Teshnehdel, S., Soflaei, F., & Shokouhian, M. (2020). Assessment of solar shading performance of courtyard houses in desert climate of Kashan, Iran. Architectural Engineering and Design Management, 16(6), 473-485.
Yang, L., Liu, X., Qian, F., & Niu, S. (2020). Research on the wind environment and air quality of parallel courtyards in a university campus. Sustainable Cities and Society, 56, 102019.
Yaşa, E., & Ok, V. (2014). Evaluation of the effects of courtyard building shapes on solar heat gains and energy efficiency according to different climatic regions. Energy and Buildings, 73, 192-199.
Zamani, Z., Heidari, S., & Hanachi, P. (2018). Reviewing the thermal and microclimatic function of courtyards. Renewable and Sustainable Energy Reviews, 93, 580-595.