Microclimatic conditions in urban open spaces are characterized by the morphology of the urban pattern and by the properties of urban surfaces. In this paper a variety of ground surface materials and vegetation located in typical open spaces, in a historical city of middle Italy (Ascoli Piceno), were examined to evaluate the influence of the surfaces on the microclimatic variations of the study area. Inside street canyons, public places and open spaces the local microclimate depends directly on the physical properties of the surrounding surfaces and objects, producing well-known effects such as wind speed decrease, local jets, increased turbulence or increased thermal loads. These phenomena can have a big influence on the comfort of the city and on the comfort of pedestrian. This urban climate assessment process requires different methods starting with numerical climate models that provide the meteorological parameters ending up with a set of models that simulate the comfort level. The used tools in the simulation are the numerical microclimate model ENVI-met and the COMFA+ thermal model which aims to calculate comfort conditions Several techniques based on bioclimatic architecture criteria and energy conservation principles have been analysed in order to improve the microclimate in an outdoor space located in a typical Mediterranean area.

Thermal comfort and microclimates in open spaces. I

COCCI GRIFONI, ROBERTA;
2010-01-01

Abstract

Microclimatic conditions in urban open spaces are characterized by the morphology of the urban pattern and by the properties of urban surfaces. In this paper a variety of ground surface materials and vegetation located in typical open spaces, in a historical city of middle Italy (Ascoli Piceno), were examined to evaluate the influence of the surfaces on the microclimatic variations of the study area. Inside street canyons, public places and open spaces the local microclimate depends directly on the physical properties of the surrounding surfaces and objects, producing well-known effects such as wind speed decrease, local jets, increased turbulence or increased thermal loads. These phenomena can have a big influence on the comfort of the city and on the comfort of pedestrian. This urban climate assessment process requires different methods starting with numerical climate models that provide the meteorological parameters ending up with a set of models that simulate the comfort level. The used tools in the simulation are the numerical microclimate model ENVI-met and the COMFA+ thermal model which aims to calculate comfort conditions Several techniques based on bioclimatic architecture criteria and energy conservation principles have been analysed in order to improve the microclimate in an outdoor space located in a typical Mediterranean area.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/312783
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