Quantification of thermal comfort based on different street orientation in winter months of urban city Dadaşkent

For healthy cities, climatic and ecological data important for thermal comfort should be considered. Especially in cities with cold winters, such data are important in terms of directed streets and building façades. The objective of this study was to assess thermal comfort for different street orientations in Dadaskent, Erzurum. The measurements were taken on 10^th, 20^th and 30^th days of each month during a 3-month period from November 2016 through January 2017. The thermal comfort measurements were taken in four different directions; North to South NDASH Camlica Villages Street (1), East to West NDASH Camlica Village Street (2), North-West to South-East NDASH Milli Egemenlik Street (3) and North-East to South-West - Emir-Seyh Street (4). Integrated average values of 4 locations on each Street and 3 measurements on each location were evaluated using area-averaged sky view factor (SVFa) and RayMan model for thermal comfort. The measurements indicated that while the average temperature and relative humidity changed between -1.5 and 0°C and 26-30% in the NE-SW oriented street, they were -1.9 and -0.2°C and 28-32% in the NW-SE oriented street, -3.0 and -1.0°C and 30-34% in the E-W oriented street and -3.3 and -1.6°C and 31-33% in the N-S oriented street, respectively. These values clearly indicated that the most suitable oriented street for the winter thermal comfort was the NE-SW oriented street, but the worst was the N-S oriented street. The results clearly indicated that the thermal comfort was better in the sub-street with lower SVF_a values. It was concluded that street orientation, public space layouts, height and shape of the buildings and vegetation strongly affect thermal conditions of the cities and therefore are important parameters for landscape architects and planners for creating healthy urban environments.