Περίληψη:
In Greece, the minimum mandatory distance (D) of a
building from the plot’s boundaries, relates only to the
building’s maximum height (H), given as D = 3 + 0.10*H.
This is the main institutional tool that shapes urban open
spaces and, consequently, the urban microclimate in Greece.
In this paper, we will illustrate a numerical model for city
planning, named D (b) in an attempt to define mandatory
minimum distance between building structures on different
plots, taking into account the ground relief and climatic
conditions of an area. The methodology we used to create
the model is based on bibliographical sources for bioclimatic
design. In particular, we were interested in identifying
data regarding the sun’s height angle (V sun), the height
of the building causing shading (Z building), the desired
shadow height (Z shadow), and the ground slope (ω).
Our model was a pilot one applied in the city planning
of a sparsely built area (a separate unit) to be incorporated
in the master plan of Serres town in Northern Greece. Two
city planning scenarios were developed (one using the presently
applied, and the other using the proposed tool), and the
results of the expected thermal islet, as given by the two
scenarios, were evaluated in comparison.
The results of this pilot program suggest that bioclimatic
distance between building structures [D (b)] contributes
to the utilization of passive energy saving systems.
Thus, it could be institutionally utilized and, in combination
with currently observed distances, could constitute a valuable
addition to the existing city planning tools in Greece.