Potentials of Vernacular Climatic Solutions (VCS) in Energy Efficiency of Domestic Buildings in Hot and Humid Climate: The Case Study of Bushehr, Iran

Document Type : Original Article


1 Ph.D. Candidate, Faculty of Architecture and Urbanism, Art University of Isfahan, Isfahan , Iran .

2 Assistant Professor , Faculty of Architecture and Urbanism, Art University of Isfahan, Isfahan , Iran.

3 Associate Professor , Faculty of Architecture and Urbanism, Shahid Beheshti University, Tehran , Iran.

4 Assistant Professor, Faculty of Architecture and Urbanism, Art University of Isfahan, Isfahan , Iran.


This study aims to use vernacular climatic solutions (VCS) of traditional dwellings of Bushehr in common residential buildings of this city in southern Iran and answer to the question that “What is the effect of VCS in terms of energy consumption in these buildings?”. This research was conducted on two levels. At the first level, after selecting an existing model of common residential buildings and short-time field measurements from local climate throughout the year, the collected data was used in simulation and some changes in terms of improvement in shading, natural ventilation and insulation of external walls and roof as vernacular climatic strategies were made in this building. At second level, the proposed models of common residential buildings were offered and the data collected at the first level was used in their simulation in two states of with and without using VCS. All models were simulated with the Design Builder software under natural ventilation conditions in moderate periods of the year while split air-conditioning systems were used during hot and humid periods. The findings showed that in the existing model, discomfort hours, cooling energy consumption and CO2 production reduced by 54 percent, 44 percent and 22 percent, respectively. In the proposed models, these values showed a decrease by 10 to 20 percent, 42 percent and 32 to 34 percent, respectively. It is also predicted that using the VCS in common residential buildings of Bushehr, could reduce the energy consumption of each household by 3500 kWh per year.


A-T. Nguyen, Q.-B. T., D-Q. Tran, S. Reiter. (2010). An investigation on climate responsive design strategies of vernacular housing in Vietnam,. Building and Environment, 46, 2088-2106.
 Aldossary, N. A., Rezgui, Y., & Kwan, A. (2014). Domestic energy consumption patterns in a hot and humid climate: A multiple-case study analysis. Applied Energy, 114, 353-365. doi: http://dx.doi.org/10.1016/j.apenergy.2013.09.061
Bodach Susanne, L. W., Hamhaber Johannes. (2014). Climate responsive building design strategies of vernacular architecture in Nepal. Energy and Buildings, 81, 227-242.
Borong, L., Gang, T., Peng, W., Ling, S., Yingxin, Z., & Guangkui, Z. (2004). Study on the thermal performance of the Chinese traditional vernacular dwellings in Summer. Energy and Buildings, 36(1), 73-79. doi: http://dx.doi.org/10.1016/S0378-7788(03)00090-2
 Brahmand Zadeh, D., & Rezaei Ghahroodi, Z. (2014). Investigating the trend of changes in power consumption in different sectors during the period from 2001 to 2012. srtc-amar, 2(2), 29-33(In Persian).
 Cheung, C. K., Fuller, R. J., & Luther, M. B. (2005). Energy-efficient envelope design for high-rise apartments. Energy and Buildings, 37(1), 37-48. doi: http://dx.doi.org/10.1016/j.enbuild.2004.05.002
Dili, A. S., Naseer, M. A., & Varghese, T. Z. (2010). Passive environment control system of Kerala vernacular residential architecture for a comfortable indoor environment: A qualitative and quantitative analyses. Energy and Buildings, 42(6), 917-927. doi: http://dx.doi.org/10.1016/j.enbuild.2010.01.002
Dili, A. S., Naseer, M. A., & Zacharia Varghese, T. (2011). Passive control methods for a comfortable indoor environment: Comparative investigation of traditional and modern architecture of Kerala in summer. Energy and Buildings, 43(2), 653-664. doi: http://dx.doi.org/10.1016/j.enbuild.2010.11.006
Haggag, M., & Elmasry, S. (2011). Integrating Passive Cooling Techniques for Sustaiable Building Performance in hot climates with Refrence to UAE. In C. Brebbia & Ē. Beriatos (Eds.), Sustainable Development and Planning V. UK: WIT Press.
Hammad, F., & Abu-Hijleh, B. (2010). The energy savings potential of using dynamic external louvers in an office building. Energy and Buildings, 42(10), 1888-1895. doi: http://dx.doi.org/10.1016/j.enbuild.2010.05.024
Hazbei, M., Nematollahi, O., Behnia, M., & Adib, Z. (2015). Reduction of energy consumption using passive architecture in hot and humid climates. Tunnelling and Underground Space Technology, 47(0), 16-27. doi: 10.1016/j.tust.2014.12.001
Hirano, T., Kato, S., Murakami, S., Ikaga, T., & Shiraishi, Y. (2006). A study on a porous residential building model in hot and humid regions: Part 1—the natural ventilation performance and the cooling load reduction effect of the building model. Building and Environment, 41(1), 21-32. doi: http://dx.doi.org/10.1016/j.buildenv.2005.01.018
M.Previtali, Z. J. Z. J. (2010). Ancient vernacular architecture: characteristics categorization and energy performance evaluation. Energy and Buildings, 42(3), 357-365.
M.R.Sumerkan, N. E. N. V. S. v. (2007). Climatic effect in the formation of vernacular houses in the Eastern Black Sea region. Building and Environment, 42(2), 960-969.
Malhotra, M. (2005). An analysis of maximum residential energy-efficiency in hot and humid climates. Texas A&M University, USA. Retrieved from http://hdl.handle.net/1969.1/3097
Mohammadi, A. (2017). The Effect of Passive Techniques on Reducing Energy Consumption in Hot and Humid Regions: The Case Study of Vernacular Cooling Methods in Common Residential Buildings of Bushehr City. (Ph.D.), Art University of Isfahan, Unpublished(In Persian).  
Mohammadi, A., & Ayatollahi, S. M. H. (2011). Designing a model shading device for Bushehr city SOFFEH, 21(3), 43-54(In Persian).
Nikghadam, N. (2015). Climatic Patterns of Functional Spaces in Vernacular Houses of Bushehr (By Grounded Theory). The Scientific Journal of NAZAR research center (Nrc) for Art, Architecture & Urbanism, 12(32), 77-90(In Persian).
Nikghadam, N. (2016). The effect of wind and sun on modulating the heating conditions of Bushehr houses Case Study: Golshan House. Iranian Journal of Architecture & Urbanism, 7(12), 29-46(In Persian).
Oropeza-Perez, I., & Østergaard, P. A. (2014). Energy saving potential of utilizing natural ventilation under warm conditions – A case study of Mexico. Applied Energy, 130, 20-32. doi: http://dx.doi.org/10.1016/j.apenergy.2014.05.035
P. Hennicke, S. B. (2010). Energierevolution Effizienzsteigerung und erneuerbare Energien als globale Herausforderung. München: Oekom-Verl.
Perez, Y. V., & Capeluto, I. G. (2009). Climatic considerations in school building design in the hot–humid climate for reducing energy consumption. Applied Energy, 86(3), 340-348. doi: http://dx.doi.org/10.1016/j.apenergy.2008.05.007
Prajongsan, P., & Sharples, S. (2012). Enhancing natural ventilation, thermal comfort and energy savings in high-rise residential buildings in Bangkok through the use of ventilation shafts. Building and Environment, 50, 104-113. doi: http://dx.doi.org/10.1016/j.buildenv.2011.10.020
Radhi, H. (2009). Evaluating the potential impact of global warming on the UAE residential buildings – A contribution to reduce the CO2 emissions. Building and Environment, 44(12), 2451-2462. doi: http://dx.doi.org/10.1016/j.buildenv.2009.04.006
ranjbar, e., pourjafar, m., & khaliji, k. (2010). Innovations In Climatic Designing Due to The Wind Flowing Through The Old Bushehr. The Scientific Journal of NAZAR research center (Nrc) for Art, Architecture & Urbanism, 7(13), 17-34(In Persian).
Rubio-Bellido, C., Pulido-Arcas, A. J., & Cabeza-Lainez, M. J. (2015). Adaptation Strategies and Resilience to Climate Change of Historic Dwellings. sustainability, 7(4). doi: 10.3390/su7043695
Shahmortezaei, S. R., & Sabernejad, J. (2016). Optimization of Proportions of Central Courtyard based on Comfort Standards in the Traditional Qajar Period Houses in Boushehr. Space Ontology International Journal, 5(2), 49-55.
Shanthi Priya, R., Sundarraja, M. C., Radhakrishnan, S., & Vijayalakshmi, L. (2012). Solar passive techniques in the vernacular buildings of coastal regions in Nagapattinam, TamilNadu-India – a qualitative and quantitative analysis. Energy and Buildings, 49, 50-61. doi: http://dx.doi.org/10.1016/j.enbuild.2011.09.033
Tahbaz, M., & jalilian, S. (2008). Challenge of Vernacular Architecture and Modern Life Style – Case Study in Iran. Paper presented at the 25th Conference on Passive and Low Energy Architecture, Dublin.
Taleb, H. M. (2014). Using passive cooling strategies to improve thermal performance and reduce energy consumption of residential buildings in U.A.E. buildings. Frontiers of architectural research, 3(2), 154-165. doi: http://dx.doi.org/10.1016/j.foar.2014.01.002
Toe, D. H. C., & Kubota, T. (2015). Comparative assessment of vernacular passive cooling techniques for improving indoor thermal comfort of modern terraced houses in hot–humid climate of Malaysia. Solar Energy, 114, 229-258. doi: http://dx.doi.org/10.1016/j.solener.2015.01.035
Xu Hong, H. Q., Liu Gang, Zhang Qi. (2016). A quantitative study of the climate-responsive design strategies of ancient timber-frame halls in northern China based on field measurements. Energy and Buildings, 133, 306–320.
Online References
Google image of Iran [Online image]. (2016). Retrieved April 14, 2016 from https://www.google.com/imghp?hl=en&tab=wi
Google maps of Bushehr [Online maps]. (2016). Retrieved April 16, 2016 from https://www.google.com/maps/@28.9714229,50.8425552,5252m/data=!3m1!1e3
Google maps of Bushehr [Online maps]. (2016). Retrieved April 16, 2016 from https://www.google.com/maps/@28.9557326,50.8498294,657m/data=!3m1!1e3
Google maps of Bushehr [Online maps]. (2016). Retrieved April 17, 2016 from https://www.google.com/maps/@28.9558476,50.8486868,328m/data=!3m1!1e3