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Abstract:This study aims to use the vernacular climatic strategies (VCS) of traditional dwellings in Bushehr, in the common residential buildings of this southern Iranian city (which is characterized by its hot and humid climate), and provide answers to the following question: What effects do VCS have in terms of energy consumption in these buildings? This study has been conducted at three levels. At the first level, three context-based climatic solutions including shading, natural ventilation, and insulation of external walls and roofs were identified and selected based on bibliographic study. At the second level, a case study reflecting the current typology of common residential buildings in Bushehr city was selected. A combination of the mentioned climatic solutions was used in the baseline case to create a developed model. Based on the space layout of the developed model and some design criteria, a series of proposed models was also created and modeled. The selected case study building was also used to establish a local weather station at a height of 12 m based on the roof, collecting local climate data which were then used for simulation to improve simulation accuracy. Finally, all models were simulated with the use of Design Builder software under natural ventilation conditions during moderate climatic periods of the year while split air-conditioning systems were used during hot and humid periods. The results showed reductions of 16% in energy consumption and 22% in CO 2 emissions for the developed model, and reductions of 24-26% in energy consumption and 32-34% in CO 2 emissions for the proposed models, as compared with the baseline model. Furthermore, all proposed models achieved lower annual energy consumption when compared with a selection of international sustainable low energy standards and domestic energy performance references for the Middle East region. Further studies are also recommended, and there is potential for combining VCS with other solutions such as on-site renewable energies.

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Since the advent of modern methods and new constructional approaches in architecture and landscape architecture, traditional architecture techniques which were based on utilizing natural energies have been completely set aside. In this case, the art of Iranian gardening has a great deal of valuable achievements and experiences which need to be reconsidered. Owing to its special geographic situation, the city of Shiraz includes a number of globally well-known gardens such as Eram, Jahannama, and Delgosha garden. As long as Persian gardens are considered as important parts of open and green spaces and urban landscapes in cities, the main purpose of this paper is the study of their structural features along with the role they play in improving environmental quality and comfort conditions. From this point of view in Landscape architecture, a quantitative-qualitative study was performed for the first time based on two distinct samples of Persian garden, Jahannama and Delgosha, to evaluate the thermal conditions of the garden's microclimate compared with the local climate and surrounding urban environment in extreme summer heat as well as intense winter cold. In this research, the latest assessment index of the open space thermal condition named the universal thermal climate index (UTCI) has been employed to evaluate the obtained data on January 24th and 25th of 2013 and July 31th and August 4th of 2014. Field data has been collected by mobile weather forecast facilities capable of recording temperature, humidity, wind, air pressure, and radiation temperature on the pre-set grid in both gardens. Final results obtained by extracting data from meteorological stations and the achieved data indicated that the structural features of the samples can highly mitigate the microclimate condition against local climate as well as short-term and long-term climate of the city. So, the main achievement of the present study is determining the role of Persian garden in improving the quality of microclimate and local climate as well as investigating the role of garden's components in enhancing thermal comfort conditions inside it.