Investigating changes in façades’ energy balance according to coating optical properties

Cooling energy refurbishment of buildings can be achieved by coating the outdoor walls with paints that have high solar reflectance (0.3-2.5µm) and high thermal emittance (4-80µm). In this presentation, the thermal performance of some paints is studied through an outdoor experiment. In a second part, the inwards conductive flux for a non-insulated wall is modelled with a premise energy budget’s module. Lastly, we introduce the construction of a 1/10th reduced scale model of 4 street canyon set to allow the validation of a model coupling mass and thermal transfers between buildings and urban microclimate. Boundary conditions and energy balance are discussed through installed sensors.