Abstract:

Turkey is undergoing a major urban transformation process. This process, also called urban renovation, takes place in the neighborhood and building scales (local transformation). In literature, the process of urban transformation is more focused on the problem of transformation in the neighborhood scale. But the characteristics of the problems associated with the scale transformation of the building are different. One of these is the distinction of tissue. With the process of restoration in place, the present urban tissue and its micro-climate characteristics are changing. A small-storey existing building in the street is transformed and built as a multi-storey building and the neighboring buildings in the fabric are shadowed. In this case, existing buildings can be predicted to be affected by energy consumption performance. The aim of this study is to explore the impact of rebuilt multi-storey buildings on existing buildings in the tissue in terms of energy. Due to the very high urban renovation activity, the example work area was selected as Suadiye (Kadıköy, Istanbul). Using the computer simulation methodology, a reference building’s energy performance is calculated for three tissue scenarios: the basic state (the rural tissue), the 1960 urban tissue and the 2019 tissue (post-renovation). In this study, where the building shell is kept stable, the impact of the city tissue on the building energy consumption has been clearly observed. According to the results of the study, during the transition from rural tissue to 1960 tissue, the reference building consumed about 9% more lighting and heating energy. The 6306 urban transformation law issued in 2012 optimized the city tissue to ensure energy savings. But in the application, when converted from 1960 to 2019 textile, the reference building consumed 1.5 percent more energy. In other words, the tissue change has increased instead of reducing energy consumption. One of the objectives of this high-cost conversion process, which is necessarily experienced with earthquake risk, is to ensure energy savings. For this purpose, in the renovated buildings, the coal isolation is required. However, regardless of the structure, the characteristic of the urban tissue also plays an important role in energy consumption. Therefore, the optimization of the urban tissue should be considered as part of the conversion process and the legal arrangements that support it should be implemented. The potential effect analysis should be done before intervention in the city tissue.

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