High resolution thermo-radiative modeling of an urban fragment in Marseilles city center during the UBL-ESCOMPTE campaign

The thermodynamic exchanges of the old city center of Marseilles during a summer period are analyzed with the SOLENE thermo-radiative model, using measurements of the UBL-ESCOMPTE experimental campaign in June–July 2001. The selected scene is an actual fragment of the urban canopy composed of 4 stre...

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Bibliographic Details
Published in:Building and environment 2011-09, Vol.46 (9), p.1747-1764
Main Authors: Hénon, Aurélien, Mestayer, Patrice G., Groleau, Dominique, Voogt, James
Format: Article
Language:English
Subjects:
Applied sciences
Atmospheres
Buildings. Public works
Canopies
Climatology and bioclimatics for buildings
Computation methods. Tables. Charts
Computer simulation
ESCOMPTE
Exact sciences and technology
Fluid mechanics
Fluxes
Fragmentation
Heat flux
Mechanics
Physics
Radiation flux
Roofs
Sensors
Structural analysis. Stresses
Summer
Urban canopy
Urban climatology
Urban development
Urban thermodynamics
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Summary:The thermodynamic exchanges of the old city center of Marseilles during a summer period are analyzed with the SOLENE thermo-radiative model, using measurements of the UBL-ESCOMPTE experimental campaign in June–July 2001. The selected scene is an actual fragment of the urban canopy composed of 4 streets at right angles, with various 19th century houses and yards. The SOLENE software’s ability to simulate the heat and radiation exchanges of this urban district with the atmosphere is first evaluated by comparing simulation outputs with surface temperatures of individual roof and façade elements measured by infrared radiation thermometers and with integrated fluxes measured on top of a neighboring meteorological mast. This model assessment is reinforced by a sensitivity study to the interior building temperature, a variable of possible influence which is usually not measured in studies at the scale of an urban fragment or district. The flux sensor position influence on the comparison is also studied by introducing a virtual sensor in the simulated scene. The software is further used to analyze the behavior of individual surface elements of the scene with various orientations during a typical summer diurnal cycle. The contributions of the different surface classes (roofs, façades, streets, yards) to the upward radiation and heat fluxes to the atmosphere are then detailed for several canopy morphologies (H/W).
ISSN:0360-1323
1873-684X
DOI:10.1016/j.buildenv.2011.02.001