Evaluation of natural ventilation systems in tall buildings considering altitude based environmental variations

Karadağ, İlker
Buildings relied on natural ventilation strategies alone for many centuries up to the post-World War II period in which cheap energy started to liberate architecture from its connection with the natural environment. Then, the economic downturn in the 1970s, fuelled by the worldwide energy crisis in 1973 drew the attention to reduction and conservation of energy, the response was the model of the sealed glass box with an acceptance of the air-conditioning system. This resulted in Sick Building Syndrome (SBS) caused by the quality of the internal air and created the basis for widespread criticism in the 1970s and 1980s. Now, the current key decision should be the re-introduction of the natural ventilation systems into the tall buildings, since natural ventilation embodies a number of advantages such as reduced CO2 emissions, elimination of SBS, better internal air quality, reduced energy consumption with reducing demand on Heating, Ventilating and Air-conditioning systems. In this study, naturally ventilated tall buildings are evaluated with respect to their natural ventilation systems’ efficiency. While doing this, some key parameters to assess natural ventilation systems is benefitted. Besides, the characteristics and gradient of vertical variations of environmental parameters influencing natural ventilation directly, such as temperature, wind velocity and direction, humidity and air pressure are examined to make it clear whether they provide new or improved strategies for natural ventilation or not. It is concluded that, natural ventilation systems encompasses more than simply operable windows and narrow plans, and to use natural ventilation systems in tall buildings, generic principles of natural ventilation as a background should be researched and this should be followed with investigation of advanced systems that enable natural ventilation at higher levels of the tall buildings.


A Study on the preliminary design of tall buildings: investigating structural components
Çamlıbel, Gülçin; Ay, Bekir Özer; Department of Building Science in Architecture (2019)
Tall buildings are built to respond to limited and high-cost urban land problem, and they became essential for urbanization which changes the sights of the cities. These buildings are huge investments, and keeping Net Floor Area (NFA) within acceptable limits while satisfying stiffness and strength requirements of the building is important; therefore, different structural systems are improved in order to overcome huge lateral load demands. Since simple design approaches and rule-of-thumb dimensioning method...
Integration of natural ventilation to office building typology in the Ankara context : a case study
Uğursal, Ahmet; Düzgüneş, Arda; Department of Architecture (2003)
Together with a global concern for the reduction and conservation of energy, the oil crisis of 1973 brought about a turning point in the design of buildings. Responses in this vein were mostly concentrated on the simplistic one of sealing the building against outdoor conditions. This approach towards energy consumption, associated with the introduction of air-conditioning systems, led to different problems such as Sick Building Syndrome. Lack of user satisfaction also appeared to be a common complaint in su...
Evaluating the impact of different atria configurations on the energy performance of buildings in different climates
Farhoudi, Meysam; Elias Özkan, Soofia Tahira; Department of Building Science in Architecture (2016)
Generally, the impact of the building sector on the world energy consumption and environmental protection is considerable; in fact, the building sector holds the half of the world total energy consumption share. Nowadays, energy efficiency phenomena as the result of several challenges that the world is encountering has become an important issue. Meanwhile, the atrium as a tool to improve the energy performance of a building can be utilized to address the high energy consumption of the conventional buildings...
The Integration of tall buildings with the urban environment: considering the key sustainability concepts
Tohumcu, Tulu; Zeytun Çakmaklı, Ayşem Berrin; Baş Bütüner, Funda; Department of Building Science in Architecture (2014)
As a result of physical, social and economic needs, demand for tall buildings is increasing worldwide. Due to their great size and large impacts on the urban environment, tall buildings, through careful design and urban integration, have the potential to improve the quality around them. Also, depending on their large area of influence, design considerations regarding sustainability and environmental integration of tall buildings need to be handled with more care than with other conventional buildings to pro...
Planning considerations of tall buildings : service core configuration and typologies
Keskin, Zeynep; Günel, Mehmet Halis; Department of Building Science in Architecture (2012)
In general, tall buildings, some of which are termed as “skyscrapers”, are among the typical and almost unavoidable features of the metropolitan cities. There is a competititive race of constructing higher and higher buildings since the birth of the infamous Home Insurance Building in Chicago which is still considered to be the pioneer of the modern tall buildings. Recently, an efficient service core design is strongly needed and inquired with the increase in height and capacity of tall buildings. Such need...
Citation Formats
İ. Karadağ, “Evaluation of natural ventilation systems in tall buildings considering altitude based environmental variations,” M.S. - Master of Science, Middle East Technical University, 2014.