Abstract
The present study aims at testing the influence of the urban morphology on the external weather conditions and the urban microclimate by treating quantitative aspects of the outdoor thermal comfort. This is based on a site investigation aims at studying the correlation between the geometry of the street, its orientation and the evolution of the physical variables: air temperature (Ta), Mean Radiant Temperature (MRT), Relative Humidity (RH), Wind speed (Ws). The measures were the subject of a campaign carried out in the urban fabric of the ksar of the red village in the wilaya of Biskra in Algeria. The objective is to define the most efficient urban geometry in term of summer thermal comfort by studying the real impacts of the urban form on the solar control and microclimatic conditions. The evaluation of the thermal comfort in these external spaces is carried out by analyzing physiologically equivalent temperature (PET) values calculated by Rayman Pro 2.1 software based on the measured microclimatic parameters.
Highlights
For several decades, the influence of climatological parameters on the comfort conditions at the urban scale has motivated a great deal of research
The evaluation of the values of the physiological equivalent temperature presented in the graph (Figure 5), we note the relationship between physiologically equivalent temperature (PET) and MTR, the increase of Mean Radiant Temperature (MRT) of which leads to an increase in PET values
It is remarkable that the values of MRT and PET vary simultaneously with the variation in the values of the SVF, the increase of which leads to an increase in the values of this index, the maximum value at point with the highest SVF
Summary
The influence of climatological parameters on the comfort conditions at the urban scale has motivated a great deal of research. Researchers specialized in urban climatology have developed a number of approaches and methods for evaluation, concluding that thermal comfort is influenced by physiological responses to the regulatory system via the microclimatic variables and by the inevitable psychological and social adaptation, which shows the degree of adaptation of the users to the external conditions, considering that the adoption of the physiological approach alone is not sufficient for a convincing and reliable evaluation of the Thermal comfort in an outdoor space (Makaremi et al, 2012; Louafi et al, 2013)
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